xref: /freebsd/crypto/openssl/apps/s_client.c (revision 833a452e9f082a7982a31c21f0da437dbbe0a39d)
1 /*
2  * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3  * Copyright 2005 Nokia. All rights reserved.
4  *
5  * Licensed under the OpenSSL license (the "License").  You may not use
6  * this file except in compliance with the License.  You can obtain a copy
7  * in the file LICENSE in the source distribution or at
8  * https://www.openssl.org/source/license.html
9  */
10 
11 #include "e_os.h"
12 #include <ctype.h>
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <errno.h>
17 #include <openssl/e_os2.h>
18 
19 #ifndef OPENSSL_NO_SOCK
20 
21 /*
22  * With IPv6, it looks like Digital has mixed up the proper order of
23  * recursive header file inclusion, resulting in the compiler complaining
24  * that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
25  * needed to have fileno() declared correctly...  So let's define u_int
26  */
27 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
28 # define __U_INT
29 typedef unsigned int u_int;
30 #endif
31 
32 #include "apps.h"
33 #include "progs.h"
34 #include <openssl/x509.h>
35 #include <openssl/ssl.h>
36 #include <openssl/err.h>
37 #include <openssl/pem.h>
38 #include <openssl/rand.h>
39 #include <openssl/ocsp.h>
40 #include <openssl/bn.h>
41 #include <openssl/async.h>
42 #ifndef OPENSSL_NO_SRP
43 # include <openssl/srp.h>
44 #endif
45 #ifndef OPENSSL_NO_CT
46 # include <openssl/ct.h>
47 #endif
48 #include "s_apps.h"
49 #include "timeouts.h"
50 #include "internal/sockets.h"
51 
52 #if defined(__has_feature)
53 # if __has_feature(memory_sanitizer)
54 #  include <sanitizer/msan_interface.h>
55 # endif
56 #endif
57 
58 #undef BUFSIZZ
59 #define BUFSIZZ 1024*8
60 #define S_CLIENT_IRC_READ_TIMEOUT 8
61 
62 static char *prog;
63 static int c_debug = 0;
64 static int c_showcerts = 0;
65 static char *keymatexportlabel = NULL;
66 static int keymatexportlen = 20;
67 static BIO *bio_c_out = NULL;
68 static int c_quiet = 0;
69 static char *sess_out = NULL;
70 static SSL_SESSION *psksess = NULL;
71 
72 static void print_stuff(BIO *berr, SSL *con, int full);
73 #ifndef OPENSSL_NO_OCSP
74 static int ocsp_resp_cb(SSL *s, void *arg);
75 #endif
76 static int ldap_ExtendedResponse_parse(const char *buf, long rem);
77 static int is_dNS_name(const char *host);
78 
79 static int saved_errno;
80 
81 static void save_errno(void)
82 {
83     saved_errno = errno;
84     errno = 0;
85 }
86 
87 static int restore_errno(void)
88 {
89     int ret = errno;
90     errno = saved_errno;
91     return ret;
92 }
93 
94 static void do_ssl_shutdown(SSL *ssl)
95 {
96     int ret;
97 
98     do {
99         /* We only do unidirectional shutdown */
100         ret = SSL_shutdown(ssl);
101         if (ret < 0) {
102             switch (SSL_get_error(ssl, ret)) {
103             case SSL_ERROR_WANT_READ:
104             case SSL_ERROR_WANT_WRITE:
105             case SSL_ERROR_WANT_ASYNC:
106             case SSL_ERROR_WANT_ASYNC_JOB:
107                 /* We just do busy waiting. Nothing clever */
108                 continue;
109             }
110             ret = 0;
111         }
112     } while (ret < 0);
113 }
114 
115 /* Default PSK identity and key */
116 static char *psk_identity = "Client_identity";
117 
118 #ifndef OPENSSL_NO_PSK
119 static unsigned int psk_client_cb(SSL *ssl, const char *hint, char *identity,
120                                   unsigned int max_identity_len,
121                                   unsigned char *psk,
122                                   unsigned int max_psk_len)
123 {
124     int ret;
125     long key_len;
126     unsigned char *key;
127 
128     if (c_debug)
129         BIO_printf(bio_c_out, "psk_client_cb\n");
130     if (!hint) {
131         /* no ServerKeyExchange message */
132         if (c_debug)
133             BIO_printf(bio_c_out,
134                        "NULL received PSK identity hint, continuing anyway\n");
135     } else if (c_debug) {
136         BIO_printf(bio_c_out, "Received PSK identity hint '%s'\n", hint);
137     }
138 
139     /*
140      * lookup PSK identity and PSK key based on the given identity hint here
141      */
142     ret = BIO_snprintf(identity, max_identity_len, "%s", psk_identity);
143     if (ret < 0 || (unsigned int)ret > max_identity_len)
144         goto out_err;
145     if (c_debug)
146         BIO_printf(bio_c_out, "created identity '%s' len=%d\n", identity,
147                    ret);
148 
149     /* convert the PSK key to binary */
150     key = OPENSSL_hexstr2buf(psk_key, &key_len);
151     if (key == NULL) {
152         BIO_printf(bio_err, "Could not convert PSK key '%s' to buffer\n",
153                    psk_key);
154         return 0;
155     }
156     if (max_psk_len > INT_MAX || key_len > (long)max_psk_len) {
157         BIO_printf(bio_err,
158                    "psk buffer of callback is too small (%d) for key (%ld)\n",
159                    max_psk_len, key_len);
160         OPENSSL_free(key);
161         return 0;
162     }
163 
164     memcpy(psk, key, key_len);
165     OPENSSL_free(key);
166 
167     if (c_debug)
168         BIO_printf(bio_c_out, "created PSK len=%ld\n", key_len);
169 
170     return key_len;
171  out_err:
172     if (c_debug)
173         BIO_printf(bio_err, "Error in PSK client callback\n");
174     return 0;
175 }
176 #endif
177 
178 const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 };
179 const unsigned char tls13_aes256gcmsha384_id[] = { 0x13, 0x02 };
180 
181 static int psk_use_session_cb(SSL *s, const EVP_MD *md,
182                               const unsigned char **id, size_t *idlen,
183                               SSL_SESSION **sess)
184 {
185     SSL_SESSION *usesess = NULL;
186     const SSL_CIPHER *cipher = NULL;
187 
188     if (psksess != NULL) {
189         SSL_SESSION_up_ref(psksess);
190         usesess = psksess;
191     } else {
192         long key_len;
193         unsigned char *key = OPENSSL_hexstr2buf(psk_key, &key_len);
194 
195         if (key == NULL) {
196             BIO_printf(bio_err, "Could not convert PSK key '%s' to buffer\n",
197                        psk_key);
198             return 0;
199         }
200 
201         /* We default to SHA-256 */
202         cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id);
203         if (cipher == NULL) {
204             BIO_printf(bio_err, "Error finding suitable ciphersuite\n");
205             OPENSSL_free(key);
206             return 0;
207         }
208 
209         usesess = SSL_SESSION_new();
210         if (usesess == NULL
211                 || !SSL_SESSION_set1_master_key(usesess, key, key_len)
212                 || !SSL_SESSION_set_cipher(usesess, cipher)
213                 || !SSL_SESSION_set_protocol_version(usesess, TLS1_3_VERSION)) {
214             OPENSSL_free(key);
215             goto err;
216         }
217         OPENSSL_free(key);
218     }
219 
220     cipher = SSL_SESSION_get0_cipher(usesess);
221     if (cipher == NULL)
222         goto err;
223 
224     if (md != NULL && SSL_CIPHER_get_handshake_digest(cipher) != md) {
225         /* PSK not usable, ignore it */
226         *id = NULL;
227         *idlen = 0;
228         *sess = NULL;
229         SSL_SESSION_free(usesess);
230     } else {
231         *sess = usesess;
232         *id = (unsigned char *)psk_identity;
233         *idlen = strlen(psk_identity);
234     }
235 
236     return 1;
237 
238  err:
239     SSL_SESSION_free(usesess);
240     return 0;
241 }
242 
243 /* This is a context that we pass to callbacks */
244 typedef struct tlsextctx_st {
245     BIO *biodebug;
246     int ack;
247 } tlsextctx;
248 
249 static int ssl_servername_cb(SSL *s, int *ad, void *arg)
250 {
251     tlsextctx *p = (tlsextctx *) arg;
252     const char *hn = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
253     if (SSL_get_servername_type(s) != -1)
254         p->ack = !SSL_session_reused(s) && hn != NULL;
255     else
256         BIO_printf(bio_err, "Can't use SSL_get_servername\n");
257 
258     return SSL_TLSEXT_ERR_OK;
259 }
260 
261 #ifndef OPENSSL_NO_SRP
262 
263 /* This is a context that we pass to all callbacks */
264 typedef struct srp_arg_st {
265     char *srppassin;
266     char *srplogin;
267     int msg;                    /* copy from c_msg */
268     int debug;                  /* copy from c_debug */
269     int amp;                    /* allow more groups */
270     int strength;               /* minimal size for N */
271 } SRP_ARG;
272 
273 # define SRP_NUMBER_ITERATIONS_FOR_PRIME 64
274 
275 static int srp_Verify_N_and_g(const BIGNUM *N, const BIGNUM *g)
276 {
277     BN_CTX *bn_ctx = BN_CTX_new();
278     BIGNUM *p = BN_new();
279     BIGNUM *r = BN_new();
280     int ret =
281         g != NULL && N != NULL && bn_ctx != NULL && BN_is_odd(N) &&
282         BN_is_prime_ex(N, SRP_NUMBER_ITERATIONS_FOR_PRIME, bn_ctx, NULL) == 1 &&
283         p != NULL && BN_rshift1(p, N) &&
284         /* p = (N-1)/2 */
285         BN_is_prime_ex(p, SRP_NUMBER_ITERATIONS_FOR_PRIME, bn_ctx, NULL) == 1 &&
286         r != NULL &&
287         /* verify g^((N-1)/2) == -1 (mod N) */
288         BN_mod_exp(r, g, p, N, bn_ctx) &&
289         BN_add_word(r, 1) && BN_cmp(r, N) == 0;
290 
291     BN_free(r);
292     BN_free(p);
293     BN_CTX_free(bn_ctx);
294     return ret;
295 }
296 
297 /*-
298  * This callback is used here for two purposes:
299  * - extended debugging
300  * - making some primality tests for unknown groups
301  * The callback is only called for a non default group.
302  *
303  * An application does not need the call back at all if
304  * only the standard groups are used.  In real life situations,
305  * client and server already share well known groups,
306  * thus there is no need to verify them.
307  * Furthermore, in case that a server actually proposes a group that
308  * is not one of those defined in RFC 5054, it is more appropriate
309  * to add the group to a static list and then compare since
310  * primality tests are rather cpu consuming.
311  */
312 
313 static int ssl_srp_verify_param_cb(SSL *s, void *arg)
314 {
315     SRP_ARG *srp_arg = (SRP_ARG *)arg;
316     BIGNUM *N = NULL, *g = NULL;
317 
318     if (((N = SSL_get_srp_N(s)) == NULL) || ((g = SSL_get_srp_g(s)) == NULL))
319         return 0;
320     if (srp_arg->debug || srp_arg->msg || srp_arg->amp == 1) {
321         BIO_printf(bio_err, "SRP parameters:\n");
322         BIO_printf(bio_err, "\tN=");
323         BN_print(bio_err, N);
324         BIO_printf(bio_err, "\n\tg=");
325         BN_print(bio_err, g);
326         BIO_printf(bio_err, "\n");
327     }
328 
329     if (SRP_check_known_gN_param(g, N))
330         return 1;
331 
332     if (srp_arg->amp == 1) {
333         if (srp_arg->debug)
334             BIO_printf(bio_err,
335                        "SRP param N and g are not known params, going to check deeper.\n");
336 
337         /*
338          * The srp_moregroups is a real debugging feature. Implementors
339          * should rather add the value to the known ones. The minimal size
340          * has already been tested.
341          */
342         if (BN_num_bits(g) <= BN_BITS && srp_Verify_N_and_g(N, g))
343             return 1;
344     }
345     BIO_printf(bio_err, "SRP param N and g rejected.\n");
346     return 0;
347 }
348 
349 # define PWD_STRLEN 1024
350 
351 static char *ssl_give_srp_client_pwd_cb(SSL *s, void *arg)
352 {
353     SRP_ARG *srp_arg = (SRP_ARG *)arg;
354     char *pass = app_malloc(PWD_STRLEN + 1, "SRP password buffer");
355     PW_CB_DATA cb_tmp;
356     int l;
357 
358     cb_tmp.password = (char *)srp_arg->srppassin;
359     cb_tmp.prompt_info = "SRP user";
360     if ((l = password_callback(pass, PWD_STRLEN, 0, &cb_tmp)) < 0) {
361         BIO_printf(bio_err, "Can't read Password\n");
362         OPENSSL_free(pass);
363         return NULL;
364     }
365     *(pass + l) = '\0';
366 
367     return pass;
368 }
369 
370 #endif
371 
372 #ifndef OPENSSL_NO_NEXTPROTONEG
373 /* This the context that we pass to next_proto_cb */
374 typedef struct tlsextnextprotoctx_st {
375     unsigned char *data;
376     size_t len;
377     int status;
378 } tlsextnextprotoctx;
379 
380 static tlsextnextprotoctx next_proto;
381 
382 static int next_proto_cb(SSL *s, unsigned char **out, unsigned char *outlen,
383                          const unsigned char *in, unsigned int inlen,
384                          void *arg)
385 {
386     tlsextnextprotoctx *ctx = arg;
387 
388     if (!c_quiet) {
389         /* We can assume that |in| is syntactically valid. */
390         unsigned i;
391         BIO_printf(bio_c_out, "Protocols advertised by server: ");
392         for (i = 0; i < inlen;) {
393             if (i)
394                 BIO_write(bio_c_out, ", ", 2);
395             BIO_write(bio_c_out, &in[i + 1], in[i]);
396             i += in[i] + 1;
397         }
398         BIO_write(bio_c_out, "\n", 1);
399     }
400 
401     ctx->status =
402         SSL_select_next_proto(out, outlen, in, inlen, ctx->data, ctx->len);
403     return SSL_TLSEXT_ERR_OK;
404 }
405 #endif                         /* ndef OPENSSL_NO_NEXTPROTONEG */
406 
407 static int serverinfo_cli_parse_cb(SSL *s, unsigned int ext_type,
408                                    const unsigned char *in, size_t inlen,
409                                    int *al, void *arg)
410 {
411     char pem_name[100];
412     unsigned char ext_buf[4 + 65536];
413 
414     /* Reconstruct the type/len fields prior to extension data */
415     inlen &= 0xffff; /* for formal memcmpy correctness */
416     ext_buf[0] = (unsigned char)(ext_type >> 8);
417     ext_buf[1] = (unsigned char)(ext_type);
418     ext_buf[2] = (unsigned char)(inlen >> 8);
419     ext_buf[3] = (unsigned char)(inlen);
420     memcpy(ext_buf + 4, in, inlen);
421 
422     BIO_snprintf(pem_name, sizeof(pem_name), "SERVERINFO FOR EXTENSION %d",
423                  ext_type);
424     PEM_write_bio(bio_c_out, pem_name, "", ext_buf, 4 + inlen);
425     return 1;
426 }
427 
428 /*
429  * Hex decoder that tolerates optional whitespace.  Returns number of bytes
430  * produced, advances inptr to end of input string.
431  */
432 static ossl_ssize_t hexdecode(const char **inptr, void *result)
433 {
434     unsigned char **out = (unsigned char **)result;
435     const char *in = *inptr;
436     unsigned char *ret = app_malloc(strlen(in) / 2, "hexdecode");
437     unsigned char *cp = ret;
438     uint8_t byte;
439     int nibble = 0;
440 
441     if (ret == NULL)
442         return -1;
443 
444     for (byte = 0; *in; ++in) {
445         int x;
446 
447         if (isspace(_UC(*in)))
448             continue;
449         x = OPENSSL_hexchar2int(*in);
450         if (x < 0) {
451             OPENSSL_free(ret);
452             return 0;
453         }
454         byte |= (char)x;
455         if ((nibble ^= 1) == 0) {
456             *cp++ = byte;
457             byte = 0;
458         } else {
459             byte <<= 4;
460         }
461     }
462     if (nibble != 0) {
463         OPENSSL_free(ret);
464         return 0;
465     }
466     *inptr = in;
467 
468     return cp - (*out = ret);
469 }
470 
471 /*
472  * Decode unsigned 0..255, returns 1 on success, <= 0 on failure. Advances
473  * inptr to next field skipping leading whitespace.
474  */
475 static ossl_ssize_t checked_uint8(const char **inptr, void *out)
476 {
477     uint8_t *result = (uint8_t *)out;
478     const char *in = *inptr;
479     char *endp;
480     long v;
481     int e;
482 
483     save_errno();
484     v = strtol(in, &endp, 10);
485     e = restore_errno();
486 
487     if (((v == LONG_MIN || v == LONG_MAX) && e == ERANGE) ||
488         endp == in || !isspace(_UC(*endp)) ||
489         v != (*result = (uint8_t) v)) {
490         return -1;
491     }
492     for (in = endp; isspace(_UC(*in)); ++in)
493         continue;
494 
495     *inptr = in;
496     return 1;
497 }
498 
499 struct tlsa_field {
500     void *var;
501     const char *name;
502     ossl_ssize_t (*parser)(const char **, void *);
503 };
504 
505 static int tlsa_import_rr(SSL *con, const char *rrdata)
506 {
507     /* Not necessary to re-init these values; the "parsers" do that. */
508     static uint8_t usage;
509     static uint8_t selector;
510     static uint8_t mtype;
511     static unsigned char *data;
512     static struct tlsa_field tlsa_fields[] = {
513         { &usage, "usage", checked_uint8 },
514         { &selector, "selector", checked_uint8 },
515         { &mtype, "mtype", checked_uint8 },
516         { &data, "data", hexdecode },
517         { NULL, }
518     };
519     struct tlsa_field *f;
520     int ret;
521     const char *cp = rrdata;
522     ossl_ssize_t len = 0;
523 
524     for (f = tlsa_fields; f->var; ++f) {
525         /* Returns number of bytes produced, advances cp to next field */
526         if ((len = f->parser(&cp, f->var)) <= 0) {
527             BIO_printf(bio_err, "%s: warning: bad TLSA %s field in: %s\n",
528                        prog, f->name, rrdata);
529             return 0;
530         }
531     }
532     /* The data field is last, so len is its length */
533     ret = SSL_dane_tlsa_add(con, usage, selector, mtype, data, len);
534     OPENSSL_free(data);
535 
536     if (ret == 0) {
537         ERR_print_errors(bio_err);
538         BIO_printf(bio_err, "%s: warning: unusable TLSA rrdata: %s\n",
539                    prog, rrdata);
540         return 0;
541     }
542     if (ret < 0) {
543         ERR_print_errors(bio_err);
544         BIO_printf(bio_err, "%s: warning: error loading TLSA rrdata: %s\n",
545                    prog, rrdata);
546         return 0;
547     }
548     return ret;
549 }
550 
551 static int tlsa_import_rrset(SSL *con, STACK_OF(OPENSSL_STRING) *rrset)
552 {
553     int num = sk_OPENSSL_STRING_num(rrset);
554     int count = 0;
555     int i;
556 
557     for (i = 0; i < num; ++i) {
558         char *rrdata = sk_OPENSSL_STRING_value(rrset, i);
559         if (tlsa_import_rr(con, rrdata) > 0)
560             ++count;
561     }
562     return count > 0;
563 }
564 
565 typedef enum OPTION_choice {
566     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
567     OPT_4, OPT_6, OPT_HOST, OPT_PORT, OPT_CONNECT, OPT_BIND, OPT_UNIX,
568     OPT_XMPPHOST, OPT_VERIFY, OPT_NAMEOPT,
569     OPT_CERT, OPT_CRL, OPT_CRL_DOWNLOAD, OPT_SESS_OUT, OPT_SESS_IN,
570     OPT_CERTFORM, OPT_CRLFORM, OPT_VERIFY_RET_ERROR, OPT_VERIFY_QUIET,
571     OPT_BRIEF, OPT_PREXIT, OPT_CRLF, OPT_QUIET, OPT_NBIO,
572     OPT_SSL_CLIENT_ENGINE, OPT_IGN_EOF, OPT_NO_IGN_EOF,
573     OPT_DEBUG, OPT_TLSEXTDEBUG, OPT_STATUS, OPT_WDEBUG,
574     OPT_MSG, OPT_MSGFILE, OPT_ENGINE, OPT_TRACE, OPT_SECURITY_DEBUG,
575     OPT_SECURITY_DEBUG_VERBOSE, OPT_SHOWCERTS, OPT_NBIO_TEST, OPT_STATE,
576     OPT_PSK_IDENTITY, OPT_PSK, OPT_PSK_SESS,
577 #ifndef OPENSSL_NO_SRP
578     OPT_SRPUSER, OPT_SRPPASS, OPT_SRP_STRENGTH, OPT_SRP_LATEUSER,
579     OPT_SRP_MOREGROUPS,
580 #endif
581     OPT_SSL3, OPT_SSL_CONFIG,
582     OPT_TLS1_3, OPT_TLS1_2, OPT_TLS1_1, OPT_TLS1, OPT_DTLS, OPT_DTLS1,
583     OPT_DTLS1_2, OPT_SCTP, OPT_TIMEOUT, OPT_MTU, OPT_KEYFORM, OPT_PASS,
584     OPT_CERT_CHAIN, OPT_CAPATH, OPT_NOCAPATH, OPT_CHAINCAPATH, OPT_VERIFYCAPATH,
585     OPT_KEY, OPT_RECONNECT, OPT_BUILD_CHAIN, OPT_CAFILE, OPT_NOCAFILE,
586     OPT_CHAINCAFILE, OPT_VERIFYCAFILE, OPT_NEXTPROTONEG, OPT_ALPN,
587     OPT_SERVERINFO, OPT_STARTTLS, OPT_SERVERNAME, OPT_NOSERVERNAME, OPT_ASYNC,
588     OPT_USE_SRTP, OPT_KEYMATEXPORT, OPT_KEYMATEXPORTLEN, OPT_PROTOHOST,
589     OPT_MAXFRAGLEN, OPT_MAX_SEND_FRAG, OPT_SPLIT_SEND_FRAG, OPT_MAX_PIPELINES,
590     OPT_READ_BUF, OPT_KEYLOG_FILE, OPT_EARLY_DATA, OPT_REQCAFILE,
591     OPT_V_ENUM,
592     OPT_X_ENUM,
593     OPT_S_ENUM,
594     OPT_FALLBACKSCSV, OPT_NOCMDS, OPT_PROXY, OPT_DANE_TLSA_DOMAIN,
595 #ifndef OPENSSL_NO_CT
596     OPT_CT, OPT_NOCT, OPT_CTLOG_FILE,
597 #endif
598     OPT_DANE_TLSA_RRDATA, OPT_DANE_EE_NO_NAME,
599     OPT_ENABLE_PHA,
600     OPT_SCTP_LABEL_BUG,
601     OPT_R_ENUM
602 } OPTION_CHOICE;
603 
604 const OPTIONS s_client_options[] = {
605     {"help", OPT_HELP, '-', "Display this summary"},
606     {"host", OPT_HOST, 's', "Use -connect instead"},
607     {"port", OPT_PORT, 'p', "Use -connect instead"},
608     {"connect", OPT_CONNECT, 's',
609      "TCP/IP where to connect (default is :" PORT ")"},
610     {"bind", OPT_BIND, 's', "bind local address for connection"},
611     {"proxy", OPT_PROXY, 's',
612      "Connect to via specified proxy to the real server"},
613 #ifdef AF_UNIX
614     {"unix", OPT_UNIX, 's', "Connect over the specified Unix-domain socket"},
615 #endif
616     {"4", OPT_4, '-', "Use IPv4 only"},
617 #ifdef AF_INET6
618     {"6", OPT_6, '-', "Use IPv6 only"},
619 #endif
620     {"verify", OPT_VERIFY, 'p', "Turn on peer certificate verification"},
621     {"cert", OPT_CERT, '<', "Certificate file to use, PEM format assumed"},
622     {"certform", OPT_CERTFORM, 'F',
623      "Certificate format (PEM or DER) PEM default"},
624     {"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
625     {"key", OPT_KEY, 's', "Private key file to use, if not in -cert file"},
626     {"keyform", OPT_KEYFORM, 'E', "Key format (PEM, DER or engine) PEM default"},
627     {"pass", OPT_PASS, 's', "Private key file pass phrase source"},
628     {"CApath", OPT_CAPATH, '/', "PEM format directory of CA's"},
629     {"CAfile", OPT_CAFILE, '<', "PEM format file of CA's"},
630     {"no-CAfile", OPT_NOCAFILE, '-',
631      "Do not load the default certificates file"},
632     {"no-CApath", OPT_NOCAPATH, '-',
633      "Do not load certificates from the default certificates directory"},
634     {"requestCAfile", OPT_REQCAFILE, '<',
635       "PEM format file of CA names to send to the server"},
636     {"dane_tlsa_domain", OPT_DANE_TLSA_DOMAIN, 's', "DANE TLSA base domain"},
637     {"dane_tlsa_rrdata", OPT_DANE_TLSA_RRDATA, 's',
638      "DANE TLSA rrdata presentation form"},
639     {"dane_ee_no_namechecks", OPT_DANE_EE_NO_NAME, '-',
640      "Disable name checks when matching DANE-EE(3) TLSA records"},
641     {"reconnect", OPT_RECONNECT, '-',
642      "Drop and re-make the connection with the same Session-ID"},
643     {"showcerts", OPT_SHOWCERTS, '-',
644      "Show all certificates sent by the server"},
645     {"debug", OPT_DEBUG, '-', "Extra output"},
646     {"msg", OPT_MSG, '-', "Show protocol messages"},
647     {"msgfile", OPT_MSGFILE, '>',
648      "File to send output of -msg or -trace, instead of stdout"},
649     {"nbio_test", OPT_NBIO_TEST, '-', "More ssl protocol testing"},
650     {"state", OPT_STATE, '-', "Print the ssl states"},
651     {"crlf", OPT_CRLF, '-', "Convert LF from terminal into CRLF"},
652     {"quiet", OPT_QUIET, '-', "No s_client output"},
653     {"ign_eof", OPT_IGN_EOF, '-', "Ignore input eof (default when -quiet)"},
654     {"no_ign_eof", OPT_NO_IGN_EOF, '-', "Don't ignore input eof"},
655     {"starttls", OPT_STARTTLS, 's',
656      "Use the appropriate STARTTLS command before starting TLS"},
657     {"xmpphost", OPT_XMPPHOST, 's',
658      "Alias of -name option for \"-starttls xmpp[-server]\""},
659     OPT_R_OPTIONS,
660     {"sess_out", OPT_SESS_OUT, '>', "File to write SSL session to"},
661     {"sess_in", OPT_SESS_IN, '<', "File to read SSL session from"},
662 #ifndef OPENSSL_NO_SRTP
663     {"use_srtp", OPT_USE_SRTP, 's',
664      "Offer SRTP key management with a colon-separated profile list"},
665 #endif
666     {"keymatexport", OPT_KEYMATEXPORT, 's',
667      "Export keying material using label"},
668     {"keymatexportlen", OPT_KEYMATEXPORTLEN, 'p',
669      "Export len bytes of keying material (default 20)"},
670     {"maxfraglen", OPT_MAXFRAGLEN, 'p',
671      "Enable Maximum Fragment Length Negotiation (len values: 512, 1024, 2048 and 4096)"},
672     {"fallback_scsv", OPT_FALLBACKSCSV, '-', "Send the fallback SCSV"},
673     {"name", OPT_PROTOHOST, 's',
674      "Hostname to use for \"-starttls lmtp\", \"-starttls smtp\" or \"-starttls xmpp[-server]\""},
675     {"CRL", OPT_CRL, '<', "CRL file to use"},
676     {"crl_download", OPT_CRL_DOWNLOAD, '-', "Download CRL from distribution points"},
677     {"CRLform", OPT_CRLFORM, 'F', "CRL format (PEM or DER) PEM is default"},
678     {"verify_return_error", OPT_VERIFY_RET_ERROR, '-',
679      "Close connection on verification error"},
680     {"verify_quiet", OPT_VERIFY_QUIET, '-', "Restrict verify output to errors"},
681     {"brief", OPT_BRIEF, '-',
682      "Restrict output to brief summary of connection parameters"},
683     {"prexit", OPT_PREXIT, '-',
684      "Print session information when the program exits"},
685     {"security_debug", OPT_SECURITY_DEBUG, '-',
686      "Enable security debug messages"},
687     {"security_debug_verbose", OPT_SECURITY_DEBUG_VERBOSE, '-',
688      "Output more security debug output"},
689     {"cert_chain", OPT_CERT_CHAIN, '<',
690      "Certificate chain file (in PEM format)"},
691     {"chainCApath", OPT_CHAINCAPATH, '/',
692      "Use dir as certificate store path to build CA certificate chain"},
693     {"verifyCApath", OPT_VERIFYCAPATH, '/',
694      "Use dir as certificate store path to verify CA certificate"},
695     {"build_chain", OPT_BUILD_CHAIN, '-', "Build certificate chain"},
696     {"chainCAfile", OPT_CHAINCAFILE, '<',
697      "CA file for certificate chain (PEM format)"},
698     {"verifyCAfile", OPT_VERIFYCAFILE, '<',
699      "CA file for certificate verification (PEM format)"},
700     {"nocommands", OPT_NOCMDS, '-', "Do not use interactive command letters"},
701     {"servername", OPT_SERVERNAME, 's',
702      "Set TLS extension servername (SNI) in ClientHello (default)"},
703     {"noservername", OPT_NOSERVERNAME, '-',
704      "Do not send the server name (SNI) extension in the ClientHello"},
705     {"tlsextdebug", OPT_TLSEXTDEBUG, '-',
706      "Hex dump of all TLS extensions received"},
707 #ifndef OPENSSL_NO_OCSP
708     {"status", OPT_STATUS, '-', "Request certificate status from server"},
709 #endif
710     {"serverinfo", OPT_SERVERINFO, 's',
711      "types  Send empty ClientHello extensions (comma-separated numbers)"},
712     {"alpn", OPT_ALPN, 's',
713      "Enable ALPN extension, considering named protocols supported (comma-separated list)"},
714     {"async", OPT_ASYNC, '-', "Support asynchronous operation"},
715     {"ssl_config", OPT_SSL_CONFIG, 's', "Use specified configuration file"},
716     {"max_send_frag", OPT_MAX_SEND_FRAG, 'p', "Maximum Size of send frames "},
717     {"split_send_frag", OPT_SPLIT_SEND_FRAG, 'p',
718      "Size used to split data for encrypt pipelines"},
719     {"max_pipelines", OPT_MAX_PIPELINES, 'p',
720      "Maximum number of encrypt/decrypt pipelines to be used"},
721     {"read_buf", OPT_READ_BUF, 'p',
722      "Default read buffer size to be used for connections"},
723     OPT_S_OPTIONS,
724     OPT_V_OPTIONS,
725     OPT_X_OPTIONS,
726 #ifndef OPENSSL_NO_SSL3
727     {"ssl3", OPT_SSL3, '-', "Just use SSLv3"},
728 #endif
729 #ifndef OPENSSL_NO_TLS1
730     {"tls1", OPT_TLS1, '-', "Just use TLSv1"},
731 #endif
732 #ifndef OPENSSL_NO_TLS1_1
733     {"tls1_1", OPT_TLS1_1, '-', "Just use TLSv1.1"},
734 #endif
735 #ifndef OPENSSL_NO_TLS1_2
736     {"tls1_2", OPT_TLS1_2, '-', "Just use TLSv1.2"},
737 #endif
738 #ifndef OPENSSL_NO_TLS1_3
739     {"tls1_3", OPT_TLS1_3, '-', "Just use TLSv1.3"},
740 #endif
741 #ifndef OPENSSL_NO_DTLS
742     {"dtls", OPT_DTLS, '-', "Use any version of DTLS"},
743     {"timeout", OPT_TIMEOUT, '-',
744      "Enable send/receive timeout on DTLS connections"},
745     {"mtu", OPT_MTU, 'p', "Set the link layer MTU"},
746 #endif
747 #ifndef OPENSSL_NO_DTLS1
748     {"dtls1", OPT_DTLS1, '-', "Just use DTLSv1"},
749 #endif
750 #ifndef OPENSSL_NO_DTLS1_2
751     {"dtls1_2", OPT_DTLS1_2, '-', "Just use DTLSv1.2"},
752 #endif
753 #ifndef OPENSSL_NO_SCTP
754     {"sctp", OPT_SCTP, '-', "Use SCTP"},
755     {"sctp_label_bug", OPT_SCTP_LABEL_BUG, '-', "Enable SCTP label length bug"},
756 #endif
757 #ifndef OPENSSL_NO_SSL_TRACE
758     {"trace", OPT_TRACE, '-', "Show trace output of protocol messages"},
759 #endif
760 #ifdef WATT32
761     {"wdebug", OPT_WDEBUG, '-', "WATT-32 tcp debugging"},
762 #endif
763     {"nbio", OPT_NBIO, '-', "Use non-blocking IO"},
764     {"psk_identity", OPT_PSK_IDENTITY, 's', "PSK identity"},
765     {"psk", OPT_PSK, 's', "PSK in hex (without 0x)"},
766     {"psk_session", OPT_PSK_SESS, '<', "File to read PSK SSL session from"},
767 #ifndef OPENSSL_NO_SRP
768     {"srpuser", OPT_SRPUSER, 's', "SRP authentication for 'user'"},
769     {"srppass", OPT_SRPPASS, 's', "Password for 'user'"},
770     {"srp_lateuser", OPT_SRP_LATEUSER, '-',
771      "SRP username into second ClientHello message"},
772     {"srp_moregroups", OPT_SRP_MOREGROUPS, '-',
773      "Tolerate other than the known g N values."},
774     {"srp_strength", OPT_SRP_STRENGTH, 'p', "Minimal length in bits for N"},
775 #endif
776 #ifndef OPENSSL_NO_NEXTPROTONEG
777     {"nextprotoneg", OPT_NEXTPROTONEG, 's',
778      "Enable NPN extension, considering named protocols supported (comma-separated list)"},
779 #endif
780 #ifndef OPENSSL_NO_ENGINE
781     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
782     {"ssl_client_engine", OPT_SSL_CLIENT_ENGINE, 's',
783      "Specify engine to be used for client certificate operations"},
784 #endif
785 #ifndef OPENSSL_NO_CT
786     {"ct", OPT_CT, '-', "Request and parse SCTs (also enables OCSP stapling)"},
787     {"noct", OPT_NOCT, '-', "Do not request or parse SCTs (default)"},
788     {"ctlogfile", OPT_CTLOG_FILE, '<', "CT log list CONF file"},
789 #endif
790     {"keylogfile", OPT_KEYLOG_FILE, '>', "Write TLS secrets to file"},
791     {"early_data", OPT_EARLY_DATA, '<', "File to send as early data"},
792     {"enable_pha", OPT_ENABLE_PHA, '-', "Enable post-handshake-authentication"},
793     {NULL, OPT_EOF, 0x00, NULL}
794 };
795 
796 typedef enum PROTOCOL_choice {
797     PROTO_OFF,
798     PROTO_SMTP,
799     PROTO_POP3,
800     PROTO_IMAP,
801     PROTO_FTP,
802     PROTO_TELNET,
803     PROTO_XMPP,
804     PROTO_XMPP_SERVER,
805     PROTO_CONNECT,
806     PROTO_IRC,
807     PROTO_MYSQL,
808     PROTO_POSTGRES,
809     PROTO_LMTP,
810     PROTO_NNTP,
811     PROTO_SIEVE,
812     PROTO_LDAP
813 } PROTOCOL_CHOICE;
814 
815 static const OPT_PAIR services[] = {
816     {"smtp", PROTO_SMTP},
817     {"pop3", PROTO_POP3},
818     {"imap", PROTO_IMAP},
819     {"ftp", PROTO_FTP},
820     {"xmpp", PROTO_XMPP},
821     {"xmpp-server", PROTO_XMPP_SERVER},
822     {"telnet", PROTO_TELNET},
823     {"irc", PROTO_IRC},
824     {"mysql", PROTO_MYSQL},
825     {"postgres", PROTO_POSTGRES},
826     {"lmtp", PROTO_LMTP},
827     {"nntp", PROTO_NNTP},
828     {"sieve", PROTO_SIEVE},
829     {"ldap", PROTO_LDAP},
830     {NULL, 0}
831 };
832 
833 #define IS_INET_FLAG(o) \
834  (o == OPT_4 || o == OPT_6 || o == OPT_HOST || o == OPT_PORT || o == OPT_CONNECT)
835 #define IS_UNIX_FLAG(o) (o == OPT_UNIX)
836 
837 #define IS_PROT_FLAG(o) \
838  (o == OPT_SSL3 || o == OPT_TLS1 || o == OPT_TLS1_1 || o == OPT_TLS1_2 \
839   || o == OPT_TLS1_3 || o == OPT_DTLS || o == OPT_DTLS1 || o == OPT_DTLS1_2)
840 
841 /* Free |*dest| and optionally set it to a copy of |source|. */
842 static void freeandcopy(char **dest, const char *source)
843 {
844     OPENSSL_free(*dest);
845     *dest = NULL;
846     if (source != NULL)
847         *dest = OPENSSL_strdup(source);
848 }
849 
850 static int new_session_cb(SSL *s, SSL_SESSION *sess)
851 {
852 
853     if (sess_out != NULL) {
854         BIO *stmp = BIO_new_file(sess_out, "w");
855 
856         if (stmp == NULL) {
857             BIO_printf(bio_err, "Error writing session file %s\n", sess_out);
858         } else {
859             PEM_write_bio_SSL_SESSION(stmp, sess);
860             BIO_free(stmp);
861         }
862     }
863 
864     /*
865      * Session data gets dumped on connection for TLSv1.2 and below, and on
866      * arrival of the NewSessionTicket for TLSv1.3.
867      */
868     if (SSL_version(s) == TLS1_3_VERSION) {
869         BIO_printf(bio_c_out,
870                    "---\nPost-Handshake New Session Ticket arrived:\n");
871         SSL_SESSION_print(bio_c_out, sess);
872         BIO_printf(bio_c_out, "---\n");
873     }
874 
875     /*
876      * We always return a "fail" response so that the session gets freed again
877      * because we haven't used the reference.
878      */
879     return 0;
880 }
881 
882 int s_client_main(int argc, char **argv)
883 {
884     BIO *sbio;
885     EVP_PKEY *key = NULL;
886     SSL *con = NULL;
887     SSL_CTX *ctx = NULL;
888     STACK_OF(X509) *chain = NULL;
889     X509 *cert = NULL;
890     X509_VERIFY_PARAM *vpm = NULL;
891     SSL_EXCERT *exc = NULL;
892     SSL_CONF_CTX *cctx = NULL;
893     STACK_OF(OPENSSL_STRING) *ssl_args = NULL;
894     char *dane_tlsa_domain = NULL;
895     STACK_OF(OPENSSL_STRING) *dane_tlsa_rrset = NULL;
896     int dane_ee_no_name = 0;
897     STACK_OF(X509_CRL) *crls = NULL;
898     const SSL_METHOD *meth = TLS_client_method();
899     const char *CApath = NULL, *CAfile = NULL;
900     char *cbuf = NULL, *sbuf = NULL;
901     char *mbuf = NULL, *proxystr = NULL, *connectstr = NULL, *bindstr = NULL;
902     char *cert_file = NULL, *key_file = NULL, *chain_file = NULL;
903     char *chCApath = NULL, *chCAfile = NULL, *host = NULL;
904     char *port = OPENSSL_strdup(PORT);
905     char *bindhost = NULL, *bindport = NULL;
906     char *passarg = NULL, *pass = NULL, *vfyCApath = NULL, *vfyCAfile = NULL;
907     char *ReqCAfile = NULL;
908     char *sess_in = NULL, *crl_file = NULL, *p;
909     const char *protohost = NULL;
910     struct timeval timeout, *timeoutp;
911     fd_set readfds, writefds;
912     int noCApath = 0, noCAfile = 0;
913     int build_chain = 0, cbuf_len, cbuf_off, cert_format = FORMAT_PEM;
914     int key_format = FORMAT_PEM, crlf = 0, full_log = 1, mbuf_len = 0;
915     int prexit = 0;
916     int sdebug = 0;
917     int reconnect = 0, verify = SSL_VERIFY_NONE, vpmtouched = 0;
918     int ret = 1, in_init = 1, i, nbio_test = 0, s = -1, k, width, state = 0;
919     int sbuf_len, sbuf_off, cmdletters = 1;
920     int socket_family = AF_UNSPEC, socket_type = SOCK_STREAM, protocol = 0;
921     int starttls_proto = PROTO_OFF, crl_format = FORMAT_PEM, crl_download = 0;
922     int write_tty, read_tty, write_ssl, read_ssl, tty_on, ssl_pending;
923 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
924     int at_eof = 0;
925 #endif
926     int read_buf_len = 0;
927     int fallback_scsv = 0;
928     OPTION_CHOICE o;
929 #ifndef OPENSSL_NO_DTLS
930     int enable_timeouts = 0;
931     long socket_mtu = 0;
932 #endif
933 #ifndef OPENSSL_NO_ENGINE
934     ENGINE *ssl_client_engine = NULL;
935 #endif
936     ENGINE *e = NULL;
937 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
938     struct timeval tv;
939 #endif
940     const char *servername = NULL;
941     int noservername = 0;
942     const char *alpn_in = NULL;
943     tlsextctx tlsextcbp = { NULL, 0 };
944     const char *ssl_config = NULL;
945 #define MAX_SI_TYPES 100
946     unsigned short serverinfo_types[MAX_SI_TYPES];
947     int serverinfo_count = 0, start = 0, len;
948 #ifndef OPENSSL_NO_NEXTPROTONEG
949     const char *next_proto_neg_in = NULL;
950 #endif
951 #ifndef OPENSSL_NO_SRP
952     char *srppass = NULL;
953     int srp_lateuser = 0;
954     SRP_ARG srp_arg = { NULL, NULL, 0, 0, 0, 1024 };
955 #endif
956 #ifndef OPENSSL_NO_SRTP
957     char *srtp_profiles = NULL;
958 #endif
959 #ifndef OPENSSL_NO_CT
960     char *ctlog_file = NULL;
961     int ct_validation = 0;
962 #endif
963     int min_version = 0, max_version = 0, prot_opt = 0, no_prot_opt = 0;
964     int async = 0;
965     unsigned int max_send_fragment = 0;
966     unsigned int split_send_fragment = 0, max_pipelines = 0;
967     enum { use_inet, use_unix, use_unknown } connect_type = use_unknown;
968     int count4or6 = 0;
969     uint8_t maxfraglen = 0;
970     int c_nbio = 0, c_msg = 0, c_ign_eof = 0, c_brief = 0;
971     int c_tlsextdebug = 0;
972 #ifndef OPENSSL_NO_OCSP
973     int c_status_req = 0;
974 #endif
975     BIO *bio_c_msg = NULL;
976     const char *keylog_file = NULL, *early_data_file = NULL;
977 #ifndef OPENSSL_NO_DTLS
978     int isdtls = 0;
979 #endif
980     char *psksessf = NULL;
981     int enable_pha = 0;
982 #ifndef OPENSSL_NO_SCTP
983     int sctp_label_bug = 0;
984 #endif
985 
986     FD_ZERO(&readfds);
987     FD_ZERO(&writefds);
988 /* Known false-positive of MemorySanitizer. */
989 #if defined(__has_feature)
990 # if __has_feature(memory_sanitizer)
991     __msan_unpoison(&readfds, sizeof(readfds));
992     __msan_unpoison(&writefds, sizeof(writefds));
993 # endif
994 #endif
995 
996     prog = opt_progname(argv[0]);
997     c_quiet = 0;
998     c_debug = 0;
999     c_showcerts = 0;
1000     c_nbio = 0;
1001     vpm = X509_VERIFY_PARAM_new();
1002     cctx = SSL_CONF_CTX_new();
1003 
1004     if (vpm == NULL || cctx == NULL) {
1005         BIO_printf(bio_err, "%s: out of memory\n", prog);
1006         goto end;
1007     }
1008 
1009     cbuf = app_malloc(BUFSIZZ, "cbuf");
1010     sbuf = app_malloc(BUFSIZZ, "sbuf");
1011     mbuf = app_malloc(BUFSIZZ, "mbuf");
1012 
1013     SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT | SSL_CONF_FLAG_CMDLINE);
1014 
1015     prog = opt_init(argc, argv, s_client_options);
1016     while ((o = opt_next()) != OPT_EOF) {
1017         /* Check for intermixing flags. */
1018         if (connect_type == use_unix && IS_INET_FLAG(o)) {
1019             BIO_printf(bio_err,
1020                        "%s: Intermixed protocol flags (unix and internet domains)\n",
1021                        prog);
1022             goto end;
1023         }
1024         if (connect_type == use_inet && IS_UNIX_FLAG(o)) {
1025             BIO_printf(bio_err,
1026                        "%s: Intermixed protocol flags (internet and unix domains)\n",
1027                        prog);
1028             goto end;
1029         }
1030 
1031         if (IS_PROT_FLAG(o) && ++prot_opt > 1) {
1032             BIO_printf(bio_err, "Cannot supply multiple protocol flags\n");
1033             goto end;
1034         }
1035         if (IS_NO_PROT_FLAG(o))
1036             no_prot_opt++;
1037         if (prot_opt == 1 && no_prot_opt) {
1038             BIO_printf(bio_err,
1039                        "Cannot supply both a protocol flag and '-no_<prot>'\n");
1040             goto end;
1041         }
1042 
1043         switch (o) {
1044         case OPT_EOF:
1045         case OPT_ERR:
1046  opthelp:
1047             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
1048             goto end;
1049         case OPT_HELP:
1050             opt_help(s_client_options);
1051             ret = 0;
1052             goto end;
1053         case OPT_4:
1054             connect_type = use_inet;
1055             socket_family = AF_INET;
1056             count4or6++;
1057             break;
1058 #ifdef AF_INET6
1059         case OPT_6:
1060             connect_type = use_inet;
1061             socket_family = AF_INET6;
1062             count4or6++;
1063             break;
1064 #endif
1065         case OPT_HOST:
1066             connect_type = use_inet;
1067             freeandcopy(&host, opt_arg());
1068             break;
1069         case OPT_PORT:
1070             connect_type = use_inet;
1071             freeandcopy(&port, opt_arg());
1072             break;
1073         case OPT_CONNECT:
1074             connect_type = use_inet;
1075             freeandcopy(&connectstr, opt_arg());
1076             break;
1077         case OPT_BIND:
1078             freeandcopy(&bindstr, opt_arg());
1079             break;
1080         case OPT_PROXY:
1081             proxystr = opt_arg();
1082             starttls_proto = PROTO_CONNECT;
1083             break;
1084 #ifdef AF_UNIX
1085         case OPT_UNIX:
1086             connect_type = use_unix;
1087             socket_family = AF_UNIX;
1088             freeandcopy(&host, opt_arg());
1089             break;
1090 #endif
1091         case OPT_XMPPHOST:
1092             /* fall through, since this is an alias */
1093         case OPT_PROTOHOST:
1094             protohost = opt_arg();
1095             break;
1096         case OPT_VERIFY:
1097             verify = SSL_VERIFY_PEER;
1098             verify_args.depth = atoi(opt_arg());
1099             if (!c_quiet)
1100                 BIO_printf(bio_err, "verify depth is %d\n", verify_args.depth);
1101             break;
1102         case OPT_CERT:
1103             cert_file = opt_arg();
1104             break;
1105         case OPT_NAMEOPT:
1106             if (!set_nameopt(opt_arg()))
1107                 goto end;
1108             break;
1109         case OPT_CRL:
1110             crl_file = opt_arg();
1111             break;
1112         case OPT_CRL_DOWNLOAD:
1113             crl_download = 1;
1114             break;
1115         case OPT_SESS_OUT:
1116             sess_out = opt_arg();
1117             break;
1118         case OPT_SESS_IN:
1119             sess_in = opt_arg();
1120             break;
1121         case OPT_CERTFORM:
1122             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &cert_format))
1123                 goto opthelp;
1124             break;
1125         case OPT_CRLFORM:
1126             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &crl_format))
1127                 goto opthelp;
1128             break;
1129         case OPT_VERIFY_RET_ERROR:
1130             verify = SSL_VERIFY_PEER;
1131             verify_args.return_error = 1;
1132             break;
1133         case OPT_VERIFY_QUIET:
1134             verify_args.quiet = 1;
1135             break;
1136         case OPT_BRIEF:
1137             c_brief = verify_args.quiet = c_quiet = 1;
1138             break;
1139         case OPT_S_CASES:
1140             if (ssl_args == NULL)
1141                 ssl_args = sk_OPENSSL_STRING_new_null();
1142             if (ssl_args == NULL
1143                 || !sk_OPENSSL_STRING_push(ssl_args, opt_flag())
1144                 || !sk_OPENSSL_STRING_push(ssl_args, opt_arg())) {
1145                 BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
1146                 goto end;
1147             }
1148             break;
1149         case OPT_V_CASES:
1150             if (!opt_verify(o, vpm))
1151                 goto end;
1152             vpmtouched++;
1153             break;
1154         case OPT_X_CASES:
1155             if (!args_excert(o, &exc))
1156                 goto end;
1157             break;
1158         case OPT_PREXIT:
1159             prexit = 1;
1160             break;
1161         case OPT_CRLF:
1162             crlf = 1;
1163             break;
1164         case OPT_QUIET:
1165             c_quiet = c_ign_eof = 1;
1166             break;
1167         case OPT_NBIO:
1168             c_nbio = 1;
1169             break;
1170         case OPT_NOCMDS:
1171             cmdletters = 0;
1172             break;
1173         case OPT_ENGINE:
1174             e = setup_engine(opt_arg(), 1);
1175             break;
1176         case OPT_SSL_CLIENT_ENGINE:
1177 #ifndef OPENSSL_NO_ENGINE
1178             ssl_client_engine = ENGINE_by_id(opt_arg());
1179             if (ssl_client_engine == NULL) {
1180                 BIO_printf(bio_err, "Error getting client auth engine\n");
1181                 goto opthelp;
1182             }
1183 #endif
1184             break;
1185         case OPT_R_CASES:
1186             if (!opt_rand(o))
1187                 goto end;
1188             break;
1189         case OPT_IGN_EOF:
1190             c_ign_eof = 1;
1191             break;
1192         case OPT_NO_IGN_EOF:
1193             c_ign_eof = 0;
1194             break;
1195         case OPT_DEBUG:
1196             c_debug = 1;
1197             break;
1198         case OPT_TLSEXTDEBUG:
1199             c_tlsextdebug = 1;
1200             break;
1201         case OPT_STATUS:
1202 #ifndef OPENSSL_NO_OCSP
1203             c_status_req = 1;
1204 #endif
1205             break;
1206         case OPT_WDEBUG:
1207 #ifdef WATT32
1208             dbug_init();
1209 #endif
1210             break;
1211         case OPT_MSG:
1212             c_msg = 1;
1213             break;
1214         case OPT_MSGFILE:
1215             bio_c_msg = BIO_new_file(opt_arg(), "w");
1216             break;
1217         case OPT_TRACE:
1218 #ifndef OPENSSL_NO_SSL_TRACE
1219             c_msg = 2;
1220 #endif
1221             break;
1222         case OPT_SECURITY_DEBUG:
1223             sdebug = 1;
1224             break;
1225         case OPT_SECURITY_DEBUG_VERBOSE:
1226             sdebug = 2;
1227             break;
1228         case OPT_SHOWCERTS:
1229             c_showcerts = 1;
1230             break;
1231         case OPT_NBIO_TEST:
1232             nbio_test = 1;
1233             break;
1234         case OPT_STATE:
1235             state = 1;
1236             break;
1237         case OPT_PSK_IDENTITY:
1238             psk_identity = opt_arg();
1239             break;
1240         case OPT_PSK:
1241             for (p = psk_key = opt_arg(); *p; p++) {
1242                 if (isxdigit(_UC(*p)))
1243                     continue;
1244                 BIO_printf(bio_err, "Not a hex number '%s'\n", psk_key);
1245                 goto end;
1246             }
1247             break;
1248         case OPT_PSK_SESS:
1249             psksessf = opt_arg();
1250             break;
1251 #ifndef OPENSSL_NO_SRP
1252         case OPT_SRPUSER:
1253             srp_arg.srplogin = opt_arg();
1254             if (min_version < TLS1_VERSION)
1255                 min_version = TLS1_VERSION;
1256             break;
1257         case OPT_SRPPASS:
1258             srppass = opt_arg();
1259             if (min_version < TLS1_VERSION)
1260                 min_version = TLS1_VERSION;
1261             break;
1262         case OPT_SRP_STRENGTH:
1263             srp_arg.strength = atoi(opt_arg());
1264             BIO_printf(bio_err, "SRP minimal length for N is %d\n",
1265                        srp_arg.strength);
1266             if (min_version < TLS1_VERSION)
1267                 min_version = TLS1_VERSION;
1268             break;
1269         case OPT_SRP_LATEUSER:
1270             srp_lateuser = 1;
1271             if (min_version < TLS1_VERSION)
1272                 min_version = TLS1_VERSION;
1273             break;
1274         case OPT_SRP_MOREGROUPS:
1275             srp_arg.amp = 1;
1276             if (min_version < TLS1_VERSION)
1277                 min_version = TLS1_VERSION;
1278             break;
1279 #endif
1280         case OPT_SSL_CONFIG:
1281             ssl_config = opt_arg();
1282             break;
1283         case OPT_SSL3:
1284             min_version = SSL3_VERSION;
1285             max_version = SSL3_VERSION;
1286             socket_type = SOCK_STREAM;
1287 #ifndef OPENSSL_NO_DTLS
1288             isdtls = 0;
1289 #endif
1290             break;
1291         case OPT_TLS1_3:
1292             min_version = TLS1_3_VERSION;
1293             max_version = TLS1_3_VERSION;
1294             socket_type = SOCK_STREAM;
1295 #ifndef OPENSSL_NO_DTLS
1296             isdtls = 0;
1297 #endif
1298             break;
1299         case OPT_TLS1_2:
1300             min_version = TLS1_2_VERSION;
1301             max_version = TLS1_2_VERSION;
1302             socket_type = SOCK_STREAM;
1303 #ifndef OPENSSL_NO_DTLS
1304             isdtls = 0;
1305 #endif
1306             break;
1307         case OPT_TLS1_1:
1308             min_version = TLS1_1_VERSION;
1309             max_version = TLS1_1_VERSION;
1310             socket_type = SOCK_STREAM;
1311 #ifndef OPENSSL_NO_DTLS
1312             isdtls = 0;
1313 #endif
1314             break;
1315         case OPT_TLS1:
1316             min_version = TLS1_VERSION;
1317             max_version = TLS1_VERSION;
1318             socket_type = SOCK_STREAM;
1319 #ifndef OPENSSL_NO_DTLS
1320             isdtls = 0;
1321 #endif
1322             break;
1323         case OPT_DTLS:
1324 #ifndef OPENSSL_NO_DTLS
1325             meth = DTLS_client_method();
1326             socket_type = SOCK_DGRAM;
1327             isdtls = 1;
1328 #endif
1329             break;
1330         case OPT_DTLS1:
1331 #ifndef OPENSSL_NO_DTLS1
1332             meth = DTLS_client_method();
1333             min_version = DTLS1_VERSION;
1334             max_version = DTLS1_VERSION;
1335             socket_type = SOCK_DGRAM;
1336             isdtls = 1;
1337 #endif
1338             break;
1339         case OPT_DTLS1_2:
1340 #ifndef OPENSSL_NO_DTLS1_2
1341             meth = DTLS_client_method();
1342             min_version = DTLS1_2_VERSION;
1343             max_version = DTLS1_2_VERSION;
1344             socket_type = SOCK_DGRAM;
1345             isdtls = 1;
1346 #endif
1347             break;
1348         case OPT_SCTP:
1349 #ifndef OPENSSL_NO_SCTP
1350             protocol = IPPROTO_SCTP;
1351 #endif
1352             break;
1353         case OPT_SCTP_LABEL_BUG:
1354 #ifndef OPENSSL_NO_SCTP
1355             sctp_label_bug = 1;
1356 #endif
1357             break;
1358         case OPT_TIMEOUT:
1359 #ifndef OPENSSL_NO_DTLS
1360             enable_timeouts = 1;
1361 #endif
1362             break;
1363         case OPT_MTU:
1364 #ifndef OPENSSL_NO_DTLS
1365             socket_mtu = atol(opt_arg());
1366 #endif
1367             break;
1368         case OPT_FALLBACKSCSV:
1369             fallback_scsv = 1;
1370             break;
1371         case OPT_KEYFORM:
1372             if (!opt_format(opt_arg(), OPT_FMT_PDE, &key_format))
1373                 goto opthelp;
1374             break;
1375         case OPT_PASS:
1376             passarg = opt_arg();
1377             break;
1378         case OPT_CERT_CHAIN:
1379             chain_file = opt_arg();
1380             break;
1381         case OPT_KEY:
1382             key_file = opt_arg();
1383             break;
1384         case OPT_RECONNECT:
1385             reconnect = 5;
1386             break;
1387         case OPT_CAPATH:
1388             CApath = opt_arg();
1389             break;
1390         case OPT_NOCAPATH:
1391             noCApath = 1;
1392             break;
1393         case OPT_CHAINCAPATH:
1394             chCApath = opt_arg();
1395             break;
1396         case OPT_VERIFYCAPATH:
1397             vfyCApath = opt_arg();
1398             break;
1399         case OPT_BUILD_CHAIN:
1400             build_chain = 1;
1401             break;
1402         case OPT_REQCAFILE:
1403             ReqCAfile = opt_arg();
1404             break;
1405         case OPT_CAFILE:
1406             CAfile = opt_arg();
1407             break;
1408         case OPT_NOCAFILE:
1409             noCAfile = 1;
1410             break;
1411 #ifndef OPENSSL_NO_CT
1412         case OPT_NOCT:
1413             ct_validation = 0;
1414             break;
1415         case OPT_CT:
1416             ct_validation = 1;
1417             break;
1418         case OPT_CTLOG_FILE:
1419             ctlog_file = opt_arg();
1420             break;
1421 #endif
1422         case OPT_CHAINCAFILE:
1423             chCAfile = opt_arg();
1424             break;
1425         case OPT_VERIFYCAFILE:
1426             vfyCAfile = opt_arg();
1427             break;
1428         case OPT_DANE_TLSA_DOMAIN:
1429             dane_tlsa_domain = opt_arg();
1430             break;
1431         case OPT_DANE_TLSA_RRDATA:
1432             if (dane_tlsa_rrset == NULL)
1433                 dane_tlsa_rrset = sk_OPENSSL_STRING_new_null();
1434             if (dane_tlsa_rrset == NULL ||
1435                 !sk_OPENSSL_STRING_push(dane_tlsa_rrset, opt_arg())) {
1436                 BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
1437                 goto end;
1438             }
1439             break;
1440         case OPT_DANE_EE_NO_NAME:
1441             dane_ee_no_name = 1;
1442             break;
1443         case OPT_NEXTPROTONEG:
1444 #ifndef OPENSSL_NO_NEXTPROTONEG
1445             next_proto_neg_in = opt_arg();
1446 #endif
1447             break;
1448         case OPT_ALPN:
1449             alpn_in = opt_arg();
1450             break;
1451         case OPT_SERVERINFO:
1452             p = opt_arg();
1453             len = strlen(p);
1454             for (start = 0, i = 0; i <= len; ++i) {
1455                 if (i == len || p[i] == ',') {
1456                     serverinfo_types[serverinfo_count] = atoi(p + start);
1457                     if (++serverinfo_count == MAX_SI_TYPES)
1458                         break;
1459                     start = i + 1;
1460                 }
1461             }
1462             break;
1463         case OPT_STARTTLS:
1464             if (!opt_pair(opt_arg(), services, &starttls_proto))
1465                 goto end;
1466             break;
1467         case OPT_SERVERNAME:
1468             servername = opt_arg();
1469             break;
1470         case OPT_NOSERVERNAME:
1471             noservername = 1;
1472             break;
1473         case OPT_USE_SRTP:
1474 #ifndef OPENSSL_NO_SRTP
1475             srtp_profiles = opt_arg();
1476 #endif
1477             break;
1478         case OPT_KEYMATEXPORT:
1479             keymatexportlabel = opt_arg();
1480             break;
1481         case OPT_KEYMATEXPORTLEN:
1482             keymatexportlen = atoi(opt_arg());
1483             break;
1484         case OPT_ASYNC:
1485             async = 1;
1486             break;
1487         case OPT_MAXFRAGLEN:
1488             len = atoi(opt_arg());
1489             switch (len) {
1490             case 512:
1491                 maxfraglen = TLSEXT_max_fragment_length_512;
1492                 break;
1493             case 1024:
1494                 maxfraglen = TLSEXT_max_fragment_length_1024;
1495                 break;
1496             case 2048:
1497                 maxfraglen = TLSEXT_max_fragment_length_2048;
1498                 break;
1499             case 4096:
1500                 maxfraglen = TLSEXT_max_fragment_length_4096;
1501                 break;
1502             default:
1503                 BIO_printf(bio_err,
1504                            "%s: Max Fragment Len %u is out of permitted values",
1505                            prog, len);
1506                 goto opthelp;
1507             }
1508             break;
1509         case OPT_MAX_SEND_FRAG:
1510             max_send_fragment = atoi(opt_arg());
1511             break;
1512         case OPT_SPLIT_SEND_FRAG:
1513             split_send_fragment = atoi(opt_arg());
1514             break;
1515         case OPT_MAX_PIPELINES:
1516             max_pipelines = atoi(opt_arg());
1517             break;
1518         case OPT_READ_BUF:
1519             read_buf_len = atoi(opt_arg());
1520             break;
1521         case OPT_KEYLOG_FILE:
1522             keylog_file = opt_arg();
1523             break;
1524         case OPT_EARLY_DATA:
1525             early_data_file = opt_arg();
1526             break;
1527         case OPT_ENABLE_PHA:
1528             enable_pha = 1;
1529             break;
1530         }
1531     }
1532     if (count4or6 >= 2) {
1533         BIO_printf(bio_err, "%s: Can't use both -4 and -6\n", prog);
1534         goto opthelp;
1535     }
1536     if (noservername) {
1537         if (servername != NULL) {
1538             BIO_printf(bio_err,
1539                        "%s: Can't use -servername and -noservername together\n",
1540                        prog);
1541             goto opthelp;
1542         }
1543         if (dane_tlsa_domain != NULL) {
1544             BIO_printf(bio_err,
1545                "%s: Can't use -dane_tlsa_domain and -noservername together\n",
1546                prog);
1547             goto opthelp;
1548         }
1549     }
1550     argc = opt_num_rest();
1551     if (argc == 1) {
1552         /* If there's a positional argument, it's the equivalent of
1553          * OPT_CONNECT.
1554          * Don't allow -connect and a separate argument.
1555          */
1556         if (connectstr != NULL) {
1557             BIO_printf(bio_err,
1558                        "%s: must not provide both -connect option and target parameter\n",
1559                        prog);
1560             goto opthelp;
1561         }
1562         connect_type = use_inet;
1563         freeandcopy(&connectstr, *opt_rest());
1564     } else if (argc != 0) {
1565         goto opthelp;
1566     }
1567 
1568 #ifndef OPENSSL_NO_NEXTPROTONEG
1569     if (min_version == TLS1_3_VERSION && next_proto_neg_in != NULL) {
1570         BIO_printf(bio_err, "Cannot supply -nextprotoneg with TLSv1.3\n");
1571         goto opthelp;
1572     }
1573 #endif
1574     if (proxystr != NULL) {
1575         int res;
1576         char *tmp_host = host, *tmp_port = port;
1577         if (connectstr == NULL) {
1578             BIO_printf(bio_err, "%s: -proxy requires use of -connect or target parameter\n", prog);
1579             goto opthelp;
1580         }
1581         res = BIO_parse_hostserv(proxystr, &host, &port, BIO_PARSE_PRIO_HOST);
1582         if (tmp_host != host)
1583             OPENSSL_free(tmp_host);
1584         if (tmp_port != port)
1585             OPENSSL_free(tmp_port);
1586         if (!res) {
1587             BIO_printf(bio_err,
1588                        "%s: -proxy argument malformed or ambiguous\n", prog);
1589             goto end;
1590         }
1591     } else {
1592         int res = 1;
1593         char *tmp_host = host, *tmp_port = port;
1594         if (connectstr != NULL)
1595             res = BIO_parse_hostserv(connectstr, &host, &port,
1596                                      BIO_PARSE_PRIO_HOST);
1597         if (tmp_host != host)
1598             OPENSSL_free(tmp_host);
1599         if (tmp_port != port)
1600             OPENSSL_free(tmp_port);
1601         if (!res) {
1602             BIO_printf(bio_err,
1603                        "%s: -connect argument or target parameter malformed or ambiguous\n",
1604                        prog);
1605             goto end;
1606         }
1607     }
1608 
1609     if (bindstr != NULL) {
1610         int res;
1611         res = BIO_parse_hostserv(bindstr, &bindhost, &bindport,
1612                                  BIO_PARSE_PRIO_HOST);
1613         if (!res) {
1614             BIO_printf(bio_err,
1615                        "%s: -bind argument parameter malformed or ambiguous\n",
1616                        prog);
1617             goto end;
1618         }
1619     }
1620 
1621 #ifdef AF_UNIX
1622     if (socket_family == AF_UNIX && socket_type != SOCK_STREAM) {
1623         BIO_printf(bio_err,
1624                    "Can't use unix sockets and datagrams together\n");
1625         goto end;
1626     }
1627 #endif
1628 
1629 #ifndef OPENSSL_NO_SCTP
1630     if (protocol == IPPROTO_SCTP) {
1631         if (socket_type != SOCK_DGRAM) {
1632             BIO_printf(bio_err, "Can't use -sctp without DTLS\n");
1633             goto end;
1634         }
1635         /* SCTP is unusual. It uses DTLS over a SOCK_STREAM protocol */
1636         socket_type = SOCK_STREAM;
1637     }
1638 #endif
1639 
1640 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1641     next_proto.status = -1;
1642     if (next_proto_neg_in) {
1643         next_proto.data =
1644             next_protos_parse(&next_proto.len, next_proto_neg_in);
1645         if (next_proto.data == NULL) {
1646             BIO_printf(bio_err, "Error parsing -nextprotoneg argument\n");
1647             goto end;
1648         }
1649     } else
1650         next_proto.data = NULL;
1651 #endif
1652 
1653     if (!app_passwd(passarg, NULL, &pass, NULL)) {
1654         BIO_printf(bio_err, "Error getting password\n");
1655         goto end;
1656     }
1657 
1658     if (key_file == NULL)
1659         key_file = cert_file;
1660 
1661     if (key_file != NULL) {
1662         key = load_key(key_file, key_format, 0, pass, e,
1663                        "client certificate private key file");
1664         if (key == NULL) {
1665             ERR_print_errors(bio_err);
1666             goto end;
1667         }
1668     }
1669 
1670     if (cert_file != NULL) {
1671         cert = load_cert(cert_file, cert_format, "client certificate file");
1672         if (cert == NULL) {
1673             ERR_print_errors(bio_err);
1674             goto end;
1675         }
1676     }
1677 
1678     if (chain_file != NULL) {
1679         if (!load_certs(chain_file, &chain, FORMAT_PEM, NULL,
1680                         "client certificate chain"))
1681             goto end;
1682     }
1683 
1684     if (crl_file != NULL) {
1685         X509_CRL *crl;
1686         crl = load_crl(crl_file, crl_format);
1687         if (crl == NULL) {
1688             BIO_puts(bio_err, "Error loading CRL\n");
1689             ERR_print_errors(bio_err);
1690             goto end;
1691         }
1692         crls = sk_X509_CRL_new_null();
1693         if (crls == NULL || !sk_X509_CRL_push(crls, crl)) {
1694             BIO_puts(bio_err, "Error adding CRL\n");
1695             ERR_print_errors(bio_err);
1696             X509_CRL_free(crl);
1697             goto end;
1698         }
1699     }
1700 
1701     if (!load_excert(&exc))
1702         goto end;
1703 
1704     if (bio_c_out == NULL) {
1705         if (c_quiet && !c_debug) {
1706             bio_c_out = BIO_new(BIO_s_null());
1707             if (c_msg && bio_c_msg == NULL)
1708                 bio_c_msg = dup_bio_out(FORMAT_TEXT);
1709         } else if (bio_c_out == NULL)
1710             bio_c_out = dup_bio_out(FORMAT_TEXT);
1711     }
1712 #ifndef OPENSSL_NO_SRP
1713     if (!app_passwd(srppass, NULL, &srp_arg.srppassin, NULL)) {
1714         BIO_printf(bio_err, "Error getting password\n");
1715         goto end;
1716     }
1717 #endif
1718 
1719     ctx = SSL_CTX_new(meth);
1720     if (ctx == NULL) {
1721         ERR_print_errors(bio_err);
1722         goto end;
1723     }
1724 
1725     SSL_CTX_clear_mode(ctx, SSL_MODE_AUTO_RETRY);
1726 
1727     if (sdebug)
1728         ssl_ctx_security_debug(ctx, sdebug);
1729 
1730     if (!config_ctx(cctx, ssl_args, ctx))
1731         goto end;
1732 
1733     if (ssl_config != NULL) {
1734         if (SSL_CTX_config(ctx, ssl_config) == 0) {
1735             BIO_printf(bio_err, "Error using configuration \"%s\"\n",
1736                        ssl_config);
1737             ERR_print_errors(bio_err);
1738             goto end;
1739         }
1740     }
1741 
1742 #ifndef OPENSSL_NO_SCTP
1743     if (protocol == IPPROTO_SCTP && sctp_label_bug == 1)
1744         SSL_CTX_set_mode(ctx, SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG);
1745 #endif
1746 
1747     if (min_version != 0
1748         && SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
1749         goto end;
1750     if (max_version != 0
1751         && SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
1752         goto end;
1753 
1754     if (vpmtouched && !SSL_CTX_set1_param(ctx, vpm)) {
1755         BIO_printf(bio_err, "Error setting verify params\n");
1756         ERR_print_errors(bio_err);
1757         goto end;
1758     }
1759 
1760     if (async) {
1761         SSL_CTX_set_mode(ctx, SSL_MODE_ASYNC);
1762     }
1763 
1764     if (max_send_fragment > 0
1765         && !SSL_CTX_set_max_send_fragment(ctx, max_send_fragment)) {
1766         BIO_printf(bio_err, "%s: Max send fragment size %u is out of permitted range\n",
1767                    prog, max_send_fragment);
1768         goto end;
1769     }
1770 
1771     if (split_send_fragment > 0
1772         && !SSL_CTX_set_split_send_fragment(ctx, split_send_fragment)) {
1773         BIO_printf(bio_err, "%s: Split send fragment size %u is out of permitted range\n",
1774                    prog, split_send_fragment);
1775         goto end;
1776     }
1777 
1778     if (max_pipelines > 0
1779         && !SSL_CTX_set_max_pipelines(ctx, max_pipelines)) {
1780         BIO_printf(bio_err, "%s: Max pipelines %u is out of permitted range\n",
1781                    prog, max_pipelines);
1782         goto end;
1783     }
1784 
1785     if (read_buf_len > 0) {
1786         SSL_CTX_set_default_read_buffer_len(ctx, read_buf_len);
1787     }
1788 
1789     if (maxfraglen > 0
1790             && !SSL_CTX_set_tlsext_max_fragment_length(ctx, maxfraglen)) {
1791         BIO_printf(bio_err,
1792                    "%s: Max Fragment Length code %u is out of permitted values"
1793                    "\n", prog, maxfraglen);
1794         goto end;
1795     }
1796 
1797     if (!ssl_load_stores(ctx, vfyCApath, vfyCAfile, chCApath, chCAfile,
1798                          crls, crl_download)) {
1799         BIO_printf(bio_err, "Error loading store locations\n");
1800         ERR_print_errors(bio_err);
1801         goto end;
1802     }
1803     if (ReqCAfile != NULL) {
1804         STACK_OF(X509_NAME) *nm = sk_X509_NAME_new_null();
1805 
1806         if (nm == NULL || !SSL_add_file_cert_subjects_to_stack(nm, ReqCAfile)) {
1807             sk_X509_NAME_pop_free(nm, X509_NAME_free);
1808             BIO_printf(bio_err, "Error loading CA names\n");
1809             ERR_print_errors(bio_err);
1810             goto end;
1811         }
1812         SSL_CTX_set0_CA_list(ctx, nm);
1813     }
1814 #ifndef OPENSSL_NO_ENGINE
1815     if (ssl_client_engine) {
1816         if (!SSL_CTX_set_client_cert_engine(ctx, ssl_client_engine)) {
1817             BIO_puts(bio_err, "Error setting client auth engine\n");
1818             ERR_print_errors(bio_err);
1819             ENGINE_free(ssl_client_engine);
1820             goto end;
1821         }
1822         ENGINE_free(ssl_client_engine);
1823     }
1824 #endif
1825 
1826 #ifndef OPENSSL_NO_PSK
1827     if (psk_key != NULL) {
1828         if (c_debug)
1829             BIO_printf(bio_c_out, "PSK key given, setting client callback\n");
1830         SSL_CTX_set_psk_client_callback(ctx, psk_client_cb);
1831     }
1832 #endif
1833     if (psksessf != NULL) {
1834         BIO *stmp = BIO_new_file(psksessf, "r");
1835 
1836         if (stmp == NULL) {
1837             BIO_printf(bio_err, "Can't open PSK session file %s\n", psksessf);
1838             ERR_print_errors(bio_err);
1839             goto end;
1840         }
1841         psksess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
1842         BIO_free(stmp);
1843         if (psksess == NULL) {
1844             BIO_printf(bio_err, "Can't read PSK session file %s\n", psksessf);
1845             ERR_print_errors(bio_err);
1846             goto end;
1847         }
1848     }
1849     if (psk_key != NULL || psksess != NULL)
1850         SSL_CTX_set_psk_use_session_callback(ctx, psk_use_session_cb);
1851 
1852 #ifndef OPENSSL_NO_SRTP
1853     if (srtp_profiles != NULL) {
1854         /* Returns 0 on success! */
1855         if (SSL_CTX_set_tlsext_use_srtp(ctx, srtp_profiles) != 0) {
1856             BIO_printf(bio_err, "Error setting SRTP profile\n");
1857             ERR_print_errors(bio_err);
1858             goto end;
1859         }
1860     }
1861 #endif
1862 
1863     if (exc != NULL)
1864         ssl_ctx_set_excert(ctx, exc);
1865 
1866 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1867     if (next_proto.data != NULL)
1868         SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &next_proto);
1869 #endif
1870     if (alpn_in) {
1871         size_t alpn_len;
1872         unsigned char *alpn = next_protos_parse(&alpn_len, alpn_in);
1873 
1874         if (alpn == NULL) {
1875             BIO_printf(bio_err, "Error parsing -alpn argument\n");
1876             goto end;
1877         }
1878         /* Returns 0 on success! */
1879         if (SSL_CTX_set_alpn_protos(ctx, alpn, alpn_len) != 0) {
1880             BIO_printf(bio_err, "Error setting ALPN\n");
1881             goto end;
1882         }
1883         OPENSSL_free(alpn);
1884     }
1885 
1886     for (i = 0; i < serverinfo_count; i++) {
1887         if (!SSL_CTX_add_client_custom_ext(ctx,
1888                                            serverinfo_types[i],
1889                                            NULL, NULL, NULL,
1890                                            serverinfo_cli_parse_cb, NULL)) {
1891             BIO_printf(bio_err,
1892                        "Warning: Unable to add custom extension %u, skipping\n",
1893                        serverinfo_types[i]);
1894         }
1895     }
1896 
1897     if (state)
1898         SSL_CTX_set_info_callback(ctx, apps_ssl_info_callback);
1899 
1900 #ifndef OPENSSL_NO_CT
1901     /* Enable SCT processing, without early connection termination */
1902     if (ct_validation &&
1903         !SSL_CTX_enable_ct(ctx, SSL_CT_VALIDATION_PERMISSIVE)) {
1904         ERR_print_errors(bio_err);
1905         goto end;
1906     }
1907 
1908     if (!ctx_set_ctlog_list_file(ctx, ctlog_file)) {
1909         if (ct_validation) {
1910             ERR_print_errors(bio_err);
1911             goto end;
1912         }
1913 
1914         /*
1915          * If CT validation is not enabled, the log list isn't needed so don't
1916          * show errors or abort. We try to load it regardless because then we
1917          * can show the names of the logs any SCTs came from (SCTs may be seen
1918          * even with validation disabled).
1919          */
1920         ERR_clear_error();
1921     }
1922 #endif
1923 
1924     SSL_CTX_set_verify(ctx, verify, verify_callback);
1925 
1926     if (!ctx_set_verify_locations(ctx, CAfile, CApath, noCAfile, noCApath)) {
1927         ERR_print_errors(bio_err);
1928         goto end;
1929     }
1930 
1931     ssl_ctx_add_crls(ctx, crls, crl_download);
1932 
1933     if (!set_cert_key_stuff(ctx, cert, key, chain, build_chain))
1934         goto end;
1935 
1936     if (!noservername) {
1937         tlsextcbp.biodebug = bio_err;
1938         SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
1939         SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp);
1940     }
1941 # ifndef OPENSSL_NO_SRP
1942     if (srp_arg.srplogin) {
1943         if (!srp_lateuser && !SSL_CTX_set_srp_username(ctx, srp_arg.srplogin)) {
1944             BIO_printf(bio_err, "Unable to set SRP username\n");
1945             goto end;
1946         }
1947         srp_arg.msg = c_msg;
1948         srp_arg.debug = c_debug;
1949         SSL_CTX_set_srp_cb_arg(ctx, &srp_arg);
1950         SSL_CTX_set_srp_client_pwd_callback(ctx, ssl_give_srp_client_pwd_cb);
1951         SSL_CTX_set_srp_strength(ctx, srp_arg.strength);
1952         if (c_msg || c_debug || srp_arg.amp == 0)
1953             SSL_CTX_set_srp_verify_param_callback(ctx,
1954                                                   ssl_srp_verify_param_cb);
1955     }
1956 # endif
1957 
1958     if (dane_tlsa_domain != NULL) {
1959         if (SSL_CTX_dane_enable(ctx) <= 0) {
1960             BIO_printf(bio_err,
1961                        "%s: Error enabling DANE TLSA authentication.\n",
1962                        prog);
1963             ERR_print_errors(bio_err);
1964             goto end;
1965         }
1966     }
1967 
1968     /*
1969      * In TLSv1.3 NewSessionTicket messages arrive after the handshake and can
1970      * come at any time. Therefore we use a callback to write out the session
1971      * when we know about it. This approach works for < TLSv1.3 as well.
1972      */
1973     SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_CLIENT
1974                                         | SSL_SESS_CACHE_NO_INTERNAL_STORE);
1975     SSL_CTX_sess_set_new_cb(ctx, new_session_cb);
1976 
1977     if (set_keylog_file(ctx, keylog_file))
1978         goto end;
1979 
1980     con = SSL_new(ctx);
1981     if (con == NULL)
1982         goto end;
1983 
1984     if (enable_pha)
1985         SSL_set_post_handshake_auth(con, 1);
1986 
1987     if (sess_in != NULL) {
1988         SSL_SESSION *sess;
1989         BIO *stmp = BIO_new_file(sess_in, "r");
1990         if (stmp == NULL) {
1991             BIO_printf(bio_err, "Can't open session file %s\n", sess_in);
1992             ERR_print_errors(bio_err);
1993             goto end;
1994         }
1995         sess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
1996         BIO_free(stmp);
1997         if (sess == NULL) {
1998             BIO_printf(bio_err, "Can't open session file %s\n", sess_in);
1999             ERR_print_errors(bio_err);
2000             goto end;
2001         }
2002         if (!SSL_set_session(con, sess)) {
2003             BIO_printf(bio_err, "Can't set session\n");
2004             ERR_print_errors(bio_err);
2005             goto end;
2006         }
2007 
2008         SSL_SESSION_free(sess);
2009     }
2010 
2011     if (fallback_scsv)
2012         SSL_set_mode(con, SSL_MODE_SEND_FALLBACK_SCSV);
2013 
2014     if (!noservername && (servername != NULL || dane_tlsa_domain == NULL)) {
2015         if (servername == NULL) {
2016             if(host == NULL || is_dNS_name(host))
2017                 servername = (host == NULL) ? "localhost" : host;
2018         }
2019         if (servername != NULL && !SSL_set_tlsext_host_name(con, servername)) {
2020             BIO_printf(bio_err, "Unable to set TLS servername extension.\n");
2021             ERR_print_errors(bio_err);
2022             goto end;
2023         }
2024     }
2025 
2026     if (dane_tlsa_domain != NULL) {
2027         if (SSL_dane_enable(con, dane_tlsa_domain) <= 0) {
2028             BIO_printf(bio_err, "%s: Error enabling DANE TLSA "
2029                        "authentication.\n", prog);
2030             ERR_print_errors(bio_err);
2031             goto end;
2032         }
2033         if (dane_tlsa_rrset == NULL) {
2034             BIO_printf(bio_err, "%s: DANE TLSA authentication requires at "
2035                        "least one -dane_tlsa_rrdata option.\n", prog);
2036             goto end;
2037         }
2038         if (tlsa_import_rrset(con, dane_tlsa_rrset) <= 0) {
2039             BIO_printf(bio_err, "%s: Failed to import any TLSA "
2040                        "records.\n", prog);
2041             goto end;
2042         }
2043         if (dane_ee_no_name)
2044             SSL_dane_set_flags(con, DANE_FLAG_NO_DANE_EE_NAMECHECKS);
2045     } else if (dane_tlsa_rrset != NULL) {
2046         BIO_printf(bio_err, "%s: DANE TLSA authentication requires the "
2047                    "-dane_tlsa_domain option.\n", prog);
2048         goto end;
2049     }
2050 
2051  re_start:
2052     if (init_client(&s, host, port, bindhost, bindport, socket_family,
2053                     socket_type, protocol) == 0) {
2054         BIO_printf(bio_err, "connect:errno=%d\n", get_last_socket_error());
2055         BIO_closesocket(s);
2056         goto end;
2057     }
2058     BIO_printf(bio_c_out, "CONNECTED(%08X)\n", s);
2059 
2060     if (c_nbio) {
2061         if (!BIO_socket_nbio(s, 1)) {
2062             ERR_print_errors(bio_err);
2063             goto end;
2064         }
2065         BIO_printf(bio_c_out, "Turned on non blocking io\n");
2066     }
2067 #ifndef OPENSSL_NO_DTLS
2068     if (isdtls) {
2069         union BIO_sock_info_u peer_info;
2070 
2071 #ifndef OPENSSL_NO_SCTP
2072         if (protocol == IPPROTO_SCTP)
2073             sbio = BIO_new_dgram_sctp(s, BIO_NOCLOSE);
2074         else
2075 #endif
2076             sbio = BIO_new_dgram(s, BIO_NOCLOSE);
2077 
2078         if ((peer_info.addr = BIO_ADDR_new()) == NULL) {
2079             BIO_printf(bio_err, "memory allocation failure\n");
2080             BIO_closesocket(s);
2081             goto end;
2082         }
2083         if (!BIO_sock_info(s, BIO_SOCK_INFO_ADDRESS, &peer_info)) {
2084             BIO_printf(bio_err, "getsockname:errno=%d\n",
2085                        get_last_socket_error());
2086             BIO_ADDR_free(peer_info.addr);
2087             BIO_closesocket(s);
2088             goto end;
2089         }
2090 
2091         (void)BIO_ctrl_set_connected(sbio, peer_info.addr);
2092         BIO_ADDR_free(peer_info.addr);
2093         peer_info.addr = NULL;
2094 
2095         if (enable_timeouts) {
2096             timeout.tv_sec = 0;
2097             timeout.tv_usec = DGRAM_RCV_TIMEOUT;
2098             BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout);
2099 
2100             timeout.tv_sec = 0;
2101             timeout.tv_usec = DGRAM_SND_TIMEOUT;
2102             BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout);
2103         }
2104 
2105         if (socket_mtu) {
2106             if (socket_mtu < DTLS_get_link_min_mtu(con)) {
2107                 BIO_printf(bio_err, "MTU too small. Must be at least %ld\n",
2108                            DTLS_get_link_min_mtu(con));
2109                 BIO_free(sbio);
2110                 goto shut;
2111             }
2112             SSL_set_options(con, SSL_OP_NO_QUERY_MTU);
2113             if (!DTLS_set_link_mtu(con, socket_mtu)) {
2114                 BIO_printf(bio_err, "Failed to set MTU\n");
2115                 BIO_free(sbio);
2116                 goto shut;
2117             }
2118         } else {
2119             /* want to do MTU discovery */
2120             BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);
2121         }
2122     } else
2123 #endif /* OPENSSL_NO_DTLS */
2124         sbio = BIO_new_socket(s, BIO_NOCLOSE);
2125 
2126     if (nbio_test) {
2127         BIO *test;
2128 
2129         test = BIO_new(BIO_f_nbio_test());
2130         sbio = BIO_push(test, sbio);
2131     }
2132 
2133     if (c_debug) {
2134         BIO_set_callback(sbio, bio_dump_callback);
2135         BIO_set_callback_arg(sbio, (char *)bio_c_out);
2136     }
2137     if (c_msg) {
2138 #ifndef OPENSSL_NO_SSL_TRACE
2139         if (c_msg == 2)
2140             SSL_set_msg_callback(con, SSL_trace);
2141         else
2142 #endif
2143             SSL_set_msg_callback(con, msg_cb);
2144         SSL_set_msg_callback_arg(con, bio_c_msg ? bio_c_msg : bio_c_out);
2145     }
2146 
2147     if (c_tlsextdebug) {
2148         SSL_set_tlsext_debug_callback(con, tlsext_cb);
2149         SSL_set_tlsext_debug_arg(con, bio_c_out);
2150     }
2151 #ifndef OPENSSL_NO_OCSP
2152     if (c_status_req) {
2153         SSL_set_tlsext_status_type(con, TLSEXT_STATUSTYPE_ocsp);
2154         SSL_CTX_set_tlsext_status_cb(ctx, ocsp_resp_cb);
2155         SSL_CTX_set_tlsext_status_arg(ctx, bio_c_out);
2156     }
2157 #endif
2158 
2159     SSL_set_bio(con, sbio, sbio);
2160     SSL_set_connect_state(con);
2161 
2162     /* ok, lets connect */
2163     if (fileno_stdin() > SSL_get_fd(con))
2164         width = fileno_stdin() + 1;
2165     else
2166         width = SSL_get_fd(con) + 1;
2167 
2168     read_tty = 1;
2169     write_tty = 0;
2170     tty_on = 0;
2171     read_ssl = 1;
2172     write_ssl = 1;
2173 
2174     cbuf_len = 0;
2175     cbuf_off = 0;
2176     sbuf_len = 0;
2177     sbuf_off = 0;
2178 
2179     switch ((PROTOCOL_CHOICE) starttls_proto) {
2180     case PROTO_OFF:
2181         break;
2182     case PROTO_LMTP:
2183     case PROTO_SMTP:
2184         {
2185             /*
2186              * This is an ugly hack that does a lot of assumptions. We do
2187              * have to handle multi-line responses which may come in a single
2188              * packet or not. We therefore have to use BIO_gets() which does
2189              * need a buffering BIO. So during the initial chitchat we do
2190              * push a buffering BIO into the chain that is removed again
2191              * later on to not disturb the rest of the s_client operation.
2192              */
2193             int foundit = 0;
2194             BIO *fbio = BIO_new(BIO_f_buffer());
2195 
2196             BIO_push(fbio, sbio);
2197             /* Wait for multi-line response to end from LMTP or SMTP */
2198             do {
2199                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2200             } while (mbuf_len > 3 && mbuf[3] == '-');
2201             if (protohost == NULL)
2202                 protohost = "mail.example.com";
2203             if (starttls_proto == (int)PROTO_LMTP)
2204                 BIO_printf(fbio, "LHLO %s\r\n", protohost);
2205             else
2206                 BIO_printf(fbio, "EHLO %s\r\n", protohost);
2207             (void)BIO_flush(fbio);
2208             /*
2209              * Wait for multi-line response to end LHLO LMTP or EHLO SMTP
2210              * response.
2211              */
2212             do {
2213                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2214                 if (strstr(mbuf, "STARTTLS"))
2215                     foundit = 1;
2216             } while (mbuf_len > 3 && mbuf[3] == '-');
2217             (void)BIO_flush(fbio);
2218             BIO_pop(fbio);
2219             BIO_free(fbio);
2220             if (!foundit)
2221                 BIO_printf(bio_err,
2222                            "Didn't find STARTTLS in server response,"
2223                            " trying anyway...\n");
2224             BIO_printf(sbio, "STARTTLS\r\n");
2225             BIO_read(sbio, sbuf, BUFSIZZ);
2226         }
2227         break;
2228     case PROTO_POP3:
2229         {
2230             BIO_read(sbio, mbuf, BUFSIZZ);
2231             BIO_printf(sbio, "STLS\r\n");
2232             mbuf_len = BIO_read(sbio, sbuf, BUFSIZZ);
2233             if (mbuf_len < 0) {
2234                 BIO_printf(bio_err, "BIO_read failed\n");
2235                 goto end;
2236             }
2237         }
2238         break;
2239     case PROTO_IMAP:
2240         {
2241             int foundit = 0;
2242             BIO *fbio = BIO_new(BIO_f_buffer());
2243 
2244             BIO_push(fbio, sbio);
2245             BIO_gets(fbio, mbuf, BUFSIZZ);
2246             /* STARTTLS command requires CAPABILITY... */
2247             BIO_printf(fbio, ". CAPABILITY\r\n");
2248             (void)BIO_flush(fbio);
2249             /* wait for multi-line CAPABILITY response */
2250             do {
2251                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2252                 if (strstr(mbuf, "STARTTLS"))
2253                     foundit = 1;
2254             }
2255             while (mbuf_len > 3 && mbuf[0] != '.');
2256             (void)BIO_flush(fbio);
2257             BIO_pop(fbio);
2258             BIO_free(fbio);
2259             if (!foundit)
2260                 BIO_printf(bio_err,
2261                            "Didn't find STARTTLS in server response,"
2262                            " trying anyway...\n");
2263             BIO_printf(sbio, ". STARTTLS\r\n");
2264             BIO_read(sbio, sbuf, BUFSIZZ);
2265         }
2266         break;
2267     case PROTO_FTP:
2268         {
2269             BIO *fbio = BIO_new(BIO_f_buffer());
2270 
2271             BIO_push(fbio, sbio);
2272             /* wait for multi-line response to end from FTP */
2273             do {
2274                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2275             }
2276             while (mbuf_len > 3 && (!isdigit(mbuf[0]) || !isdigit(mbuf[1]) || !isdigit(mbuf[2]) || mbuf[3] != ' '));
2277             (void)BIO_flush(fbio);
2278             BIO_pop(fbio);
2279             BIO_free(fbio);
2280             BIO_printf(sbio, "AUTH TLS\r\n");
2281             BIO_read(sbio, sbuf, BUFSIZZ);
2282         }
2283         break;
2284     case PROTO_XMPP:
2285     case PROTO_XMPP_SERVER:
2286         {
2287             int seen = 0;
2288             BIO_printf(sbio, "<stream:stream "
2289                        "xmlns:stream='http://etherx.jabber.org/streams' "
2290                        "xmlns='jabber:%s' to='%s' version='1.0'>",
2291                        starttls_proto == PROTO_XMPP ? "client" : "server",
2292                        protohost ? protohost : host);
2293             seen = BIO_read(sbio, mbuf, BUFSIZZ);
2294             if (seen < 0) {
2295                 BIO_printf(bio_err, "BIO_read failed\n");
2296                 goto end;
2297             }
2298             mbuf[seen] = '\0';
2299             while (!strstr
2300                    (mbuf, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'")
2301                    && !strstr(mbuf,
2302                               "<starttls xmlns=\"urn:ietf:params:xml:ns:xmpp-tls\""))
2303             {
2304                 seen = BIO_read(sbio, mbuf, BUFSIZZ);
2305 
2306                 if (seen <= 0)
2307                     goto shut;
2308 
2309                 mbuf[seen] = '\0';
2310             }
2311             BIO_printf(sbio,
2312                        "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
2313             seen = BIO_read(sbio, sbuf, BUFSIZZ);
2314             if (seen < 0) {
2315                 BIO_printf(bio_err, "BIO_read failed\n");
2316                 goto shut;
2317             }
2318             sbuf[seen] = '\0';
2319             if (!strstr(sbuf, "<proceed"))
2320                 goto shut;
2321             mbuf[0] = '\0';
2322         }
2323         break;
2324     case PROTO_TELNET:
2325         {
2326             static const unsigned char tls_do[] = {
2327                 /* IAC    DO   START_TLS */
2328                    255,   253, 46
2329             };
2330             static const unsigned char tls_will[] = {
2331                 /* IAC  WILL START_TLS */
2332                    255, 251, 46
2333             };
2334             static const unsigned char tls_follows[] = {
2335                 /* IAC  SB   START_TLS FOLLOWS IAC  SE */
2336                    255, 250, 46,       1,      255, 240
2337             };
2338             int bytes;
2339 
2340             /* Telnet server should demand we issue START_TLS */
2341             bytes = BIO_read(sbio, mbuf, BUFSIZZ);
2342             if (bytes != 3 || memcmp(mbuf, tls_do, 3) != 0)
2343                 goto shut;
2344             /* Agree to issue START_TLS and send the FOLLOWS sub-command */
2345             BIO_write(sbio, tls_will, 3);
2346             BIO_write(sbio, tls_follows, 6);
2347             (void)BIO_flush(sbio);
2348             /* Telnet server also sent the FOLLOWS sub-command */
2349             bytes = BIO_read(sbio, mbuf, BUFSIZZ);
2350             if (bytes != 6 || memcmp(mbuf, tls_follows, 6) != 0)
2351                 goto shut;
2352         }
2353         break;
2354     case PROTO_CONNECT:
2355         {
2356             enum {
2357                 error_proto,     /* Wrong protocol, not even HTTP */
2358                 error_connect,   /* CONNECT failed */
2359                 success
2360             } foundit = error_connect;
2361             BIO *fbio = BIO_new(BIO_f_buffer());
2362 
2363             BIO_push(fbio, sbio);
2364             BIO_printf(fbio, "CONNECT %s HTTP/1.0\r\n\r\n", connectstr);
2365             (void)BIO_flush(fbio);
2366             /*
2367              * The first line is the HTTP response.  According to RFC 7230,
2368              * it's formatted exactly like this:
2369              *
2370              * HTTP/d.d ddd Reason text\r\n
2371              */
2372             mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2373             if (mbuf_len < (int)strlen("HTTP/1.0 200")) {
2374                 BIO_printf(bio_err,
2375                            "%s: HTTP CONNECT failed, insufficient response "
2376                            "from proxy (got %d octets)\n", prog, mbuf_len);
2377                 (void)BIO_flush(fbio);
2378                 BIO_pop(fbio);
2379                 BIO_free(fbio);
2380                 goto shut;
2381             }
2382             if (mbuf[8] != ' ') {
2383                 BIO_printf(bio_err,
2384                            "%s: HTTP CONNECT failed, incorrect response "
2385                            "from proxy\n", prog);
2386                 foundit = error_proto;
2387             } else if (mbuf[9] != '2') {
2388                 BIO_printf(bio_err, "%s: HTTP CONNECT failed: %s ", prog,
2389                            &mbuf[9]);
2390             } else {
2391                 foundit = success;
2392             }
2393             if (foundit != error_proto) {
2394                 /* Read past all following headers */
2395                 do {
2396                     mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2397                 } while (mbuf_len > 2);
2398             }
2399             (void)BIO_flush(fbio);
2400             BIO_pop(fbio);
2401             BIO_free(fbio);
2402             if (foundit != success) {
2403                 goto shut;
2404             }
2405         }
2406         break;
2407     case PROTO_IRC:
2408         {
2409             int numeric;
2410             BIO *fbio = BIO_new(BIO_f_buffer());
2411 
2412             BIO_push(fbio, sbio);
2413             BIO_printf(fbio, "STARTTLS\r\n");
2414             (void)BIO_flush(fbio);
2415             width = SSL_get_fd(con) + 1;
2416 
2417             do {
2418                 numeric = 0;
2419 
2420                 FD_ZERO(&readfds);
2421                 openssl_fdset(SSL_get_fd(con), &readfds);
2422                 timeout.tv_sec = S_CLIENT_IRC_READ_TIMEOUT;
2423                 timeout.tv_usec = 0;
2424                 /*
2425                  * If the IRCd doesn't respond within
2426                  * S_CLIENT_IRC_READ_TIMEOUT seconds, assume
2427                  * it doesn't support STARTTLS. Many IRCds
2428                  * will not give _any_ sort of response to a
2429                  * STARTTLS command when it's not supported.
2430                  */
2431                 if (!BIO_get_buffer_num_lines(fbio)
2432                     && !BIO_pending(fbio)
2433                     && !BIO_pending(sbio)
2434                     && select(width, (void *)&readfds, NULL, NULL,
2435                               &timeout) < 1) {
2436                     BIO_printf(bio_err,
2437                                "Timeout waiting for response (%d seconds).\n",
2438                                S_CLIENT_IRC_READ_TIMEOUT);
2439                     break;
2440                 }
2441 
2442                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2443                 if (mbuf_len < 1 || sscanf(mbuf, "%*s %d", &numeric) != 1)
2444                     break;
2445                 /* :example.net 451 STARTTLS :You have not registered */
2446                 /* :example.net 421 STARTTLS :Unknown command */
2447                 if ((numeric == 451 || numeric == 421)
2448                     && strstr(mbuf, "STARTTLS") != NULL) {
2449                     BIO_printf(bio_err, "STARTTLS not supported: %s", mbuf);
2450                     break;
2451                 }
2452                 if (numeric == 691) {
2453                     BIO_printf(bio_err, "STARTTLS negotiation failed: ");
2454                     ERR_print_errors(bio_err);
2455                     break;
2456                 }
2457             } while (numeric != 670);
2458 
2459             (void)BIO_flush(fbio);
2460             BIO_pop(fbio);
2461             BIO_free(fbio);
2462             if (numeric != 670) {
2463                 BIO_printf(bio_err, "Server does not support STARTTLS.\n");
2464                 ret = 1;
2465                 goto shut;
2466             }
2467         }
2468         break;
2469     case PROTO_MYSQL:
2470         {
2471             /* SSL request packet */
2472             static const unsigned char ssl_req[] = {
2473                 /* payload_length,   sequence_id */
2474                    0x20, 0x00, 0x00, 0x01,
2475                 /* payload */
2476                 /* capability flags, CLIENT_SSL always set */
2477                    0x85, 0xae, 0x7f, 0x00,
2478                 /* max-packet size */
2479                    0x00, 0x00, 0x00, 0x01,
2480                 /* character set */
2481                    0x21,
2482                 /* string[23] reserved (all [0]) */
2483                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
2484                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
2485                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
2486             };
2487             int bytes = 0;
2488             int ssl_flg = 0x800;
2489             int pos;
2490             const unsigned char *packet = (const unsigned char *)sbuf;
2491 
2492             /* Receiving Initial Handshake packet. */
2493             bytes = BIO_read(sbio, (void *)packet, BUFSIZZ);
2494             if (bytes < 0) {
2495                 BIO_printf(bio_err, "BIO_read failed\n");
2496                 goto shut;
2497             /* Packet length[3], Packet number[1] + minimum payload[17] */
2498             } else if (bytes < 21) {
2499                 BIO_printf(bio_err, "MySQL packet too short.\n");
2500                 goto shut;
2501             } else if (bytes != (4 + packet[0] +
2502                                  (packet[1] << 8) +
2503                                  (packet[2] << 16))) {
2504                 BIO_printf(bio_err, "MySQL packet length does not match.\n");
2505                 goto shut;
2506             /* protocol version[1] */
2507             } else if (packet[4] != 0xA) {
2508                 BIO_printf(bio_err,
2509                            "Only MySQL protocol version 10 is supported.\n");
2510                 goto shut;
2511             }
2512 
2513             pos = 5;
2514             /* server version[string+NULL] */
2515             for (;;) {
2516                 if (pos >= bytes) {
2517                     BIO_printf(bio_err, "Cannot confirm server version. ");
2518                     goto shut;
2519                 } else if (packet[pos++] == '\0') {
2520                     break;
2521                 }
2522             }
2523 
2524             /* make sure we have at least 15 bytes left in the packet */
2525             if (pos + 15 > bytes) {
2526                 BIO_printf(bio_err,
2527                            "MySQL server handshake packet is broken.\n");
2528                 goto shut;
2529             }
2530 
2531             pos += 12; /* skip over conn id[4] + SALT[8] */
2532             if (packet[pos++] != '\0') { /* verify filler */
2533                 BIO_printf(bio_err,
2534                            "MySQL packet is broken.\n");
2535                 goto shut;
2536             }
2537 
2538             /* capability flags[2] */
2539             if (!((packet[pos] + (packet[pos + 1] << 8)) & ssl_flg)) {
2540                 BIO_printf(bio_err, "MySQL server does not support SSL.\n");
2541                 goto shut;
2542             }
2543 
2544             /* Sending SSL Handshake packet. */
2545             BIO_write(sbio, ssl_req, sizeof(ssl_req));
2546             (void)BIO_flush(sbio);
2547         }
2548         break;
2549     case PROTO_POSTGRES:
2550         {
2551             static const unsigned char ssl_request[] = {
2552                 /* Length        SSLRequest */
2553                    0, 0, 0, 8,   4, 210, 22, 47
2554             };
2555             int bytes;
2556 
2557             /* Send SSLRequest packet */
2558             BIO_write(sbio, ssl_request, 8);
2559             (void)BIO_flush(sbio);
2560 
2561             /* Reply will be a single S if SSL is enabled */
2562             bytes = BIO_read(sbio, sbuf, BUFSIZZ);
2563             if (bytes != 1 || sbuf[0] != 'S')
2564                 goto shut;
2565         }
2566         break;
2567     case PROTO_NNTP:
2568         {
2569             int foundit = 0;
2570             BIO *fbio = BIO_new(BIO_f_buffer());
2571 
2572             BIO_push(fbio, sbio);
2573             BIO_gets(fbio, mbuf, BUFSIZZ);
2574             /* STARTTLS command requires CAPABILITIES... */
2575             BIO_printf(fbio, "CAPABILITIES\r\n");
2576             (void)BIO_flush(fbio);
2577             /* wait for multi-line CAPABILITIES response */
2578             do {
2579                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2580                 if (strstr(mbuf, "STARTTLS"))
2581                     foundit = 1;
2582             } while (mbuf_len > 1 && mbuf[0] != '.');
2583             (void)BIO_flush(fbio);
2584             BIO_pop(fbio);
2585             BIO_free(fbio);
2586             if (!foundit)
2587                 BIO_printf(bio_err,
2588                            "Didn't find STARTTLS in server response,"
2589                            " trying anyway...\n");
2590             BIO_printf(sbio, "STARTTLS\r\n");
2591             mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
2592             if (mbuf_len < 0) {
2593                 BIO_printf(bio_err, "BIO_read failed\n");
2594                 goto end;
2595             }
2596             mbuf[mbuf_len] = '\0';
2597             if (strstr(mbuf, "382") == NULL) {
2598                 BIO_printf(bio_err, "STARTTLS failed: %s", mbuf);
2599                 goto shut;
2600             }
2601         }
2602         break;
2603     case PROTO_SIEVE:
2604         {
2605             int foundit = 0;
2606             BIO *fbio = BIO_new(BIO_f_buffer());
2607 
2608             BIO_push(fbio, sbio);
2609             /* wait for multi-line response to end from Sieve */
2610             do {
2611                 mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
2612                 /*
2613                  * According to RFC 5804 § 1.7, capability
2614                  * is case-insensitive, make it uppercase
2615                  */
2616                 if (mbuf_len > 1 && mbuf[0] == '"') {
2617                     make_uppercase(mbuf);
2618                     if (strncmp(mbuf, "\"STARTTLS\"", 10) == 0)
2619                         foundit = 1;
2620                 }
2621             } while (mbuf_len > 1 && mbuf[0] == '"');
2622             (void)BIO_flush(fbio);
2623             BIO_pop(fbio);
2624             BIO_free(fbio);
2625             if (!foundit)
2626                 BIO_printf(bio_err,
2627                            "Didn't find STARTTLS in server response,"
2628                            " trying anyway...\n");
2629             BIO_printf(sbio, "STARTTLS\r\n");
2630             mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
2631             if (mbuf_len < 0) {
2632                 BIO_printf(bio_err, "BIO_read failed\n");
2633                 goto end;
2634             }
2635             mbuf[mbuf_len] = '\0';
2636             if (mbuf_len < 2) {
2637                 BIO_printf(bio_err, "STARTTLS failed: %s", mbuf);
2638                 goto shut;
2639             }
2640             /*
2641              * According to RFC 5804 § 2.2, response codes are case-
2642              * insensitive, make it uppercase but preserve the response.
2643              */
2644             strncpy(sbuf, mbuf, 2);
2645             make_uppercase(sbuf);
2646             if (strncmp(sbuf, "OK", 2) != 0) {
2647                 BIO_printf(bio_err, "STARTTLS not supported: %s", mbuf);
2648                 goto shut;
2649             }
2650         }
2651         break;
2652     case PROTO_LDAP:
2653         {
2654             /* StartTLS Operation according to RFC 4511 */
2655             static char ldap_tls_genconf[] = "asn1=SEQUENCE:LDAPMessage\n"
2656                 "[LDAPMessage]\n"
2657                 "messageID=INTEGER:1\n"
2658                 "extendedReq=EXPLICIT:23A,IMPLICIT:0C,"
2659                 "FORMAT:ASCII,OCT:1.3.6.1.4.1.1466.20037\n";
2660             long errline = -1;
2661             char *genstr = NULL;
2662             int result = -1;
2663             ASN1_TYPE *atyp = NULL;
2664             BIO *ldapbio = BIO_new(BIO_s_mem());
2665             CONF *cnf = NCONF_new(NULL);
2666 
2667             if (cnf == NULL) {
2668                 BIO_free(ldapbio);
2669                 goto end;
2670             }
2671             BIO_puts(ldapbio, ldap_tls_genconf);
2672             if (NCONF_load_bio(cnf, ldapbio, &errline) <= 0) {
2673                 BIO_free(ldapbio);
2674                 NCONF_free(cnf);
2675                 if (errline <= 0) {
2676                     BIO_printf(bio_err, "NCONF_load_bio failed\n");
2677                     goto end;
2678                 } else {
2679                     BIO_printf(bio_err, "Error on line %ld\n", errline);
2680                     goto end;
2681                 }
2682             }
2683             BIO_free(ldapbio);
2684             genstr = NCONF_get_string(cnf, "default", "asn1");
2685             if (genstr == NULL) {
2686                 NCONF_free(cnf);
2687                 BIO_printf(bio_err, "NCONF_get_string failed\n");
2688                 goto end;
2689             }
2690             atyp = ASN1_generate_nconf(genstr, cnf);
2691             if (atyp == NULL) {
2692                 NCONF_free(cnf);
2693                 BIO_printf(bio_err, "ASN1_generate_nconf failed\n");
2694                 goto end;
2695             }
2696             NCONF_free(cnf);
2697 
2698             /* Send SSLRequest packet */
2699             BIO_write(sbio, atyp->value.sequence->data,
2700                       atyp->value.sequence->length);
2701             (void)BIO_flush(sbio);
2702             ASN1_TYPE_free(atyp);
2703 
2704             mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
2705             if (mbuf_len < 0) {
2706                 BIO_printf(bio_err, "BIO_read failed\n");
2707                 goto end;
2708             }
2709             result = ldap_ExtendedResponse_parse(mbuf, mbuf_len);
2710             if (result < 0) {
2711                 BIO_printf(bio_err, "ldap_ExtendedResponse_parse failed\n");
2712                 goto shut;
2713             } else if (result > 0) {
2714                 BIO_printf(bio_err, "STARTTLS failed, LDAP Result Code: %i\n",
2715                            result);
2716                 goto shut;
2717             }
2718             mbuf_len = 0;
2719         }
2720         break;
2721     }
2722 
2723     if (early_data_file != NULL
2724             && ((SSL_get0_session(con) != NULL
2725                  && SSL_SESSION_get_max_early_data(SSL_get0_session(con)) > 0)
2726                 || (psksess != NULL
2727                     && SSL_SESSION_get_max_early_data(psksess) > 0))) {
2728         BIO *edfile = BIO_new_file(early_data_file, "r");
2729         size_t readbytes, writtenbytes;
2730         int finish = 0;
2731 
2732         if (edfile == NULL) {
2733             BIO_printf(bio_err, "Cannot open early data file\n");
2734             goto shut;
2735         }
2736 
2737         while (!finish) {
2738             if (!BIO_read_ex(edfile, cbuf, BUFSIZZ, &readbytes))
2739                 finish = 1;
2740 
2741             while (!SSL_write_early_data(con, cbuf, readbytes, &writtenbytes)) {
2742                 switch (SSL_get_error(con, 0)) {
2743                 case SSL_ERROR_WANT_WRITE:
2744                 case SSL_ERROR_WANT_ASYNC:
2745                 case SSL_ERROR_WANT_READ:
2746                     /* Just keep trying - busy waiting */
2747                     continue;
2748                 default:
2749                     BIO_printf(bio_err, "Error writing early data\n");
2750                     BIO_free(edfile);
2751                     ERR_print_errors(bio_err);
2752                     goto shut;
2753                 }
2754             }
2755         }
2756 
2757         BIO_free(edfile);
2758     }
2759 
2760     for (;;) {
2761         FD_ZERO(&readfds);
2762         FD_ZERO(&writefds);
2763 
2764         if (SSL_is_dtls(con) && DTLSv1_get_timeout(con, &timeout))
2765             timeoutp = &timeout;
2766         else
2767             timeoutp = NULL;
2768 
2769         if (!SSL_is_init_finished(con) && SSL_total_renegotiations(con) == 0
2770                 && SSL_get_key_update_type(con) == SSL_KEY_UPDATE_NONE) {
2771             in_init = 1;
2772             tty_on = 0;
2773         } else {
2774             tty_on = 1;
2775             if (in_init) {
2776                 in_init = 0;
2777 
2778                 if (c_brief) {
2779                     BIO_puts(bio_err, "CONNECTION ESTABLISHED\n");
2780                     print_ssl_summary(con);
2781                 }
2782 
2783                 print_stuff(bio_c_out, con, full_log);
2784                 if (full_log > 0)
2785                     full_log--;
2786 
2787                 if (starttls_proto) {
2788                     BIO_write(bio_err, mbuf, mbuf_len);
2789                     /* We don't need to know any more */
2790                     if (!reconnect)
2791                         starttls_proto = PROTO_OFF;
2792                 }
2793 
2794                 if (reconnect) {
2795                     reconnect--;
2796                     BIO_printf(bio_c_out,
2797                                "drop connection and then reconnect\n");
2798                     do_ssl_shutdown(con);
2799                     SSL_set_connect_state(con);
2800                     BIO_closesocket(SSL_get_fd(con));
2801                     goto re_start;
2802                 }
2803             }
2804         }
2805 
2806         ssl_pending = read_ssl && SSL_has_pending(con);
2807 
2808         if (!ssl_pending) {
2809 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
2810             if (tty_on) {
2811                 /*
2812                  * Note that select() returns when read _would not block_,
2813                  * and EOF satisfies that.  To avoid a CPU-hogging loop,
2814                  * set the flag so we exit.
2815                  */
2816                 if (read_tty && !at_eof)
2817                     openssl_fdset(fileno_stdin(), &readfds);
2818 #if !defined(OPENSSL_SYS_VMS)
2819                 if (write_tty)
2820                     openssl_fdset(fileno_stdout(), &writefds);
2821 #endif
2822             }
2823             if (read_ssl)
2824                 openssl_fdset(SSL_get_fd(con), &readfds);
2825             if (write_ssl)
2826                 openssl_fdset(SSL_get_fd(con), &writefds);
2827 #else
2828             if (!tty_on || !write_tty) {
2829                 if (read_ssl)
2830                     openssl_fdset(SSL_get_fd(con), &readfds);
2831                 if (write_ssl)
2832                     openssl_fdset(SSL_get_fd(con), &writefds);
2833             }
2834 #endif
2835 
2836             /*
2837              * Note: under VMS with SOCKETSHR the second parameter is
2838              * currently of type (int *) whereas under other systems it is
2839              * (void *) if you don't have a cast it will choke the compiler:
2840              * if you do have a cast then you can either go for (int *) or
2841              * (void *).
2842              */
2843 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
2844             /*
2845              * Under Windows/DOS we make the assumption that we can always
2846              * write to the tty: therefore if we need to write to the tty we
2847              * just fall through. Otherwise we timeout the select every
2848              * second and see if there are any keypresses. Note: this is a
2849              * hack, in a proper Windows application we wouldn't do this.
2850              */
2851             i = 0;
2852             if (!write_tty) {
2853                 if (read_tty) {
2854                     tv.tv_sec = 1;
2855                     tv.tv_usec = 0;
2856                     i = select(width, (void *)&readfds, (void *)&writefds,
2857                                NULL, &tv);
2858                     if (!i && (!has_stdin_waiting() || !read_tty))
2859                         continue;
2860                 } else
2861                     i = select(width, (void *)&readfds, (void *)&writefds,
2862                                NULL, timeoutp);
2863             }
2864 #else
2865             i = select(width, (void *)&readfds, (void *)&writefds,
2866                        NULL, timeoutp);
2867 #endif
2868             if (i < 0) {
2869                 BIO_printf(bio_err, "bad select %d\n",
2870                            get_last_socket_error());
2871                 goto shut;
2872             }
2873         }
2874 
2875         if (SSL_is_dtls(con) && DTLSv1_handle_timeout(con) > 0)
2876             BIO_printf(bio_err, "TIMEOUT occurred\n");
2877 
2878         if (!ssl_pending && FD_ISSET(SSL_get_fd(con), &writefds)) {
2879             k = SSL_write(con, &(cbuf[cbuf_off]), (unsigned int)cbuf_len);
2880             switch (SSL_get_error(con, k)) {
2881             case SSL_ERROR_NONE:
2882                 cbuf_off += k;
2883                 cbuf_len -= k;
2884                 if (k <= 0)
2885                     goto end;
2886                 /* we have done a  write(con,NULL,0); */
2887                 if (cbuf_len <= 0) {
2888                     read_tty = 1;
2889                     write_ssl = 0;
2890                 } else {        /* if (cbuf_len > 0) */
2891 
2892                     read_tty = 0;
2893                     write_ssl = 1;
2894                 }
2895                 break;
2896             case SSL_ERROR_WANT_WRITE:
2897                 BIO_printf(bio_c_out, "write W BLOCK\n");
2898                 write_ssl = 1;
2899                 read_tty = 0;
2900                 break;
2901             case SSL_ERROR_WANT_ASYNC:
2902                 BIO_printf(bio_c_out, "write A BLOCK\n");
2903                 wait_for_async(con);
2904                 write_ssl = 1;
2905                 read_tty = 0;
2906                 break;
2907             case SSL_ERROR_WANT_READ:
2908                 BIO_printf(bio_c_out, "write R BLOCK\n");
2909                 write_tty = 0;
2910                 read_ssl = 1;
2911                 write_ssl = 0;
2912                 break;
2913             case SSL_ERROR_WANT_X509_LOOKUP:
2914                 BIO_printf(bio_c_out, "write X BLOCK\n");
2915                 break;
2916             case SSL_ERROR_ZERO_RETURN:
2917                 if (cbuf_len != 0) {
2918                     BIO_printf(bio_c_out, "shutdown\n");
2919                     ret = 0;
2920                     goto shut;
2921                 } else {
2922                     read_tty = 1;
2923                     write_ssl = 0;
2924                     break;
2925                 }
2926 
2927             case SSL_ERROR_SYSCALL:
2928                 if ((k != 0) || (cbuf_len != 0)) {
2929                     BIO_printf(bio_err, "write:errno=%d\n",
2930                                get_last_socket_error());
2931                     goto shut;
2932                 } else {
2933                     read_tty = 1;
2934                     write_ssl = 0;
2935                 }
2936                 break;
2937             case SSL_ERROR_WANT_ASYNC_JOB:
2938                 /* This shouldn't ever happen in s_client - treat as an error */
2939             case SSL_ERROR_SSL:
2940                 ERR_print_errors(bio_err);
2941                 goto shut;
2942             }
2943         }
2944 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VMS)
2945         /* Assume Windows/DOS/BeOS can always write */
2946         else if (!ssl_pending && write_tty)
2947 #else
2948         else if (!ssl_pending && FD_ISSET(fileno_stdout(), &writefds))
2949 #endif
2950         {
2951 #ifdef CHARSET_EBCDIC
2952             ascii2ebcdic(&(sbuf[sbuf_off]), &(sbuf[sbuf_off]), sbuf_len);
2953 #endif
2954             i = raw_write_stdout(&(sbuf[sbuf_off]), sbuf_len);
2955 
2956             if (i <= 0) {
2957                 BIO_printf(bio_c_out, "DONE\n");
2958                 ret = 0;
2959                 goto shut;
2960             }
2961 
2962             sbuf_len -= i;
2963             sbuf_off += i;
2964             if (sbuf_len <= 0) {
2965                 read_ssl = 1;
2966                 write_tty = 0;
2967             }
2968         } else if (ssl_pending || FD_ISSET(SSL_get_fd(con), &readfds)) {
2969 #ifdef RENEG
2970             {
2971                 static int iiii;
2972                 if (++iiii == 52) {
2973                     SSL_renegotiate(con);
2974                     iiii = 0;
2975                 }
2976             }
2977 #endif
2978             k = SSL_read(con, sbuf, 1024 /* BUFSIZZ */ );
2979 
2980             switch (SSL_get_error(con, k)) {
2981             case SSL_ERROR_NONE:
2982                 if (k <= 0)
2983                     goto end;
2984                 sbuf_off = 0;
2985                 sbuf_len = k;
2986 
2987                 read_ssl = 0;
2988                 write_tty = 1;
2989                 break;
2990             case SSL_ERROR_WANT_ASYNC:
2991                 BIO_printf(bio_c_out, "read A BLOCK\n");
2992                 wait_for_async(con);
2993                 write_tty = 0;
2994                 read_ssl = 1;
2995                 if ((read_tty == 0) && (write_ssl == 0))
2996                     write_ssl = 1;
2997                 break;
2998             case SSL_ERROR_WANT_WRITE:
2999                 BIO_printf(bio_c_out, "read W BLOCK\n");
3000                 write_ssl = 1;
3001                 read_tty = 0;
3002                 break;
3003             case SSL_ERROR_WANT_READ:
3004                 BIO_printf(bio_c_out, "read R BLOCK\n");
3005                 write_tty = 0;
3006                 read_ssl = 1;
3007                 if ((read_tty == 0) && (write_ssl == 0))
3008                     write_ssl = 1;
3009                 break;
3010             case SSL_ERROR_WANT_X509_LOOKUP:
3011                 BIO_printf(bio_c_out, "read X BLOCK\n");
3012                 break;
3013             case SSL_ERROR_SYSCALL:
3014                 ret = get_last_socket_error();
3015                 if (c_brief)
3016                     BIO_puts(bio_err, "CONNECTION CLOSED BY SERVER\n");
3017                 else
3018                     BIO_printf(bio_err, "read:errno=%d\n", ret);
3019                 goto shut;
3020             case SSL_ERROR_ZERO_RETURN:
3021                 BIO_printf(bio_c_out, "closed\n");
3022                 ret = 0;
3023                 goto shut;
3024             case SSL_ERROR_WANT_ASYNC_JOB:
3025                 /* This shouldn't ever happen in s_client. Treat as an error */
3026             case SSL_ERROR_SSL:
3027                 ERR_print_errors(bio_err);
3028                 goto shut;
3029             }
3030         }
3031 /* OPENSSL_SYS_MSDOS includes OPENSSL_SYS_WINDOWS */
3032 #if defined(OPENSSL_SYS_MSDOS)
3033         else if (has_stdin_waiting())
3034 #else
3035         else if (FD_ISSET(fileno_stdin(), &readfds))
3036 #endif
3037         {
3038             if (crlf) {
3039                 int j, lf_num;
3040 
3041                 i = raw_read_stdin(cbuf, BUFSIZZ / 2);
3042                 lf_num = 0;
3043                 /* both loops are skipped when i <= 0 */
3044                 for (j = 0; j < i; j++)
3045                     if (cbuf[j] == '\n')
3046                         lf_num++;
3047                 for (j = i - 1; j >= 0; j--) {
3048                     cbuf[j + lf_num] = cbuf[j];
3049                     if (cbuf[j] == '\n') {
3050                         lf_num--;
3051                         i++;
3052                         cbuf[j + lf_num] = '\r';
3053                     }
3054                 }
3055                 assert(lf_num == 0);
3056             } else
3057                 i = raw_read_stdin(cbuf, BUFSIZZ);
3058 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
3059             if (i == 0)
3060                 at_eof = 1;
3061 #endif
3062 
3063             if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q' && cmdletters))) {
3064                 BIO_printf(bio_err, "DONE\n");
3065                 ret = 0;
3066                 goto shut;
3067             }
3068 
3069             if ((!c_ign_eof) && (cbuf[0] == 'R' && cmdletters)) {
3070                 BIO_printf(bio_err, "RENEGOTIATING\n");
3071                 SSL_renegotiate(con);
3072                 cbuf_len = 0;
3073 	    } else if (!c_ign_eof && (cbuf[0] == 'K' || cbuf[0] == 'k' )
3074                     && cmdletters) {
3075                 BIO_printf(bio_err, "KEYUPDATE\n");
3076                 SSL_key_update(con,
3077                                cbuf[0] == 'K' ? SSL_KEY_UPDATE_REQUESTED
3078                                               : SSL_KEY_UPDATE_NOT_REQUESTED);
3079                 cbuf_len = 0;
3080             }
3081 #ifndef OPENSSL_NO_HEARTBEATS
3082             else if ((!c_ign_eof) && (cbuf[0] == 'B' && cmdletters)) {
3083                 BIO_printf(bio_err, "HEARTBEATING\n");
3084                 SSL_heartbeat(con);
3085                 cbuf_len = 0;
3086             }
3087 #endif
3088             else {
3089                 cbuf_len = i;
3090                 cbuf_off = 0;
3091 #ifdef CHARSET_EBCDIC
3092                 ebcdic2ascii(cbuf, cbuf, i);
3093 #endif
3094             }
3095 
3096             write_ssl = 1;
3097             read_tty = 0;
3098         }
3099     }
3100 
3101     ret = 0;
3102  shut:
3103     if (in_init)
3104         print_stuff(bio_c_out, con, full_log);
3105     do_ssl_shutdown(con);
3106 
3107     /*
3108      * If we ended with an alert being sent, but still with data in the
3109      * network buffer to be read, then calling BIO_closesocket() will
3110      * result in a TCP-RST being sent. On some platforms (notably
3111      * Windows) then this will result in the peer immediately abandoning
3112      * the connection including any buffered alert data before it has
3113      * had a chance to be read. Shutting down the sending side first,
3114      * and then closing the socket sends TCP-FIN first followed by
3115      * TCP-RST. This seems to allow the peer to read the alert data.
3116      */
3117     shutdown(SSL_get_fd(con), 1); /* SHUT_WR */
3118     /*
3119      * We just said we have nothing else to say, but it doesn't mean that
3120      * the other side has nothing. It's even recommended to consume incoming
3121      * data. [In testing context this ensures that alerts are passed on...]
3122      */
3123     timeout.tv_sec = 0;
3124     timeout.tv_usec = 500000;  /* some extreme round-trip */
3125     do {
3126         FD_ZERO(&readfds);
3127         openssl_fdset(s, &readfds);
3128     } while (select(s + 1, &readfds, NULL, NULL, &timeout) > 0
3129              && BIO_read(sbio, sbuf, BUFSIZZ) > 0);
3130 
3131     BIO_closesocket(SSL_get_fd(con));
3132  end:
3133     if (con != NULL) {
3134         if (prexit != 0)
3135             print_stuff(bio_c_out, con, 1);
3136         SSL_free(con);
3137     }
3138     SSL_SESSION_free(psksess);
3139 #if !defined(OPENSSL_NO_NEXTPROTONEG)
3140     OPENSSL_free(next_proto.data);
3141 #endif
3142     SSL_CTX_free(ctx);
3143     set_keylog_file(NULL, NULL);
3144     X509_free(cert);
3145     sk_X509_CRL_pop_free(crls, X509_CRL_free);
3146     EVP_PKEY_free(key);
3147     sk_X509_pop_free(chain, X509_free);
3148     OPENSSL_free(pass);
3149 #ifndef OPENSSL_NO_SRP
3150     OPENSSL_free(srp_arg.srppassin);
3151 #endif
3152     OPENSSL_free(connectstr);
3153     OPENSSL_free(bindstr);
3154     OPENSSL_free(bindhost);
3155     OPENSSL_free(bindport);
3156     OPENSSL_free(host);
3157     OPENSSL_free(port);
3158     X509_VERIFY_PARAM_free(vpm);
3159     ssl_excert_free(exc);
3160     sk_OPENSSL_STRING_free(ssl_args);
3161     sk_OPENSSL_STRING_free(dane_tlsa_rrset);
3162     SSL_CONF_CTX_free(cctx);
3163     OPENSSL_clear_free(cbuf, BUFSIZZ);
3164     OPENSSL_clear_free(sbuf, BUFSIZZ);
3165     OPENSSL_clear_free(mbuf, BUFSIZZ);
3166     release_engine(e);
3167     BIO_free(bio_c_out);
3168     bio_c_out = NULL;
3169     BIO_free(bio_c_msg);
3170     bio_c_msg = NULL;
3171     return ret;
3172 }
3173 
3174 static void print_stuff(BIO *bio, SSL *s, int full)
3175 {
3176     X509 *peer = NULL;
3177     STACK_OF(X509) *sk;
3178     const SSL_CIPHER *c;
3179     int i, istls13 = (SSL_version(s) == TLS1_3_VERSION);
3180     long verify_result;
3181 #ifndef OPENSSL_NO_COMP
3182     const COMP_METHOD *comp, *expansion;
3183 #endif
3184     unsigned char *exportedkeymat;
3185 #ifndef OPENSSL_NO_CT
3186     const SSL_CTX *ctx = SSL_get_SSL_CTX(s);
3187 #endif
3188 
3189     if (full) {
3190         int got_a_chain = 0;
3191 
3192         sk = SSL_get_peer_cert_chain(s);
3193         if (sk != NULL) {
3194             got_a_chain = 1;
3195 
3196             BIO_printf(bio, "---\nCertificate chain\n");
3197             for (i = 0; i < sk_X509_num(sk); i++) {
3198                 BIO_printf(bio, "%2d s:", i);
3199                 X509_NAME_print_ex(bio, X509_get_subject_name(sk_X509_value(sk, i)), 0, get_nameopt());
3200                 BIO_puts(bio, "\n");
3201                 BIO_printf(bio, "   i:");
3202                 X509_NAME_print_ex(bio, X509_get_issuer_name(sk_X509_value(sk, i)), 0, get_nameopt());
3203                 BIO_puts(bio, "\n");
3204                 if (c_showcerts)
3205                     PEM_write_bio_X509(bio, sk_X509_value(sk, i));
3206             }
3207         }
3208 
3209         BIO_printf(bio, "---\n");
3210         peer = SSL_get_peer_certificate(s);
3211         if (peer != NULL) {
3212             BIO_printf(bio, "Server certificate\n");
3213 
3214             /* Redundant if we showed the whole chain */
3215             if (!(c_showcerts && got_a_chain))
3216                 PEM_write_bio_X509(bio, peer);
3217             dump_cert_text(bio, peer);
3218         } else {
3219             BIO_printf(bio, "no peer certificate available\n");
3220         }
3221         print_ca_names(bio, s);
3222 
3223         ssl_print_sigalgs(bio, s);
3224         ssl_print_tmp_key(bio, s);
3225 
3226 #ifndef OPENSSL_NO_CT
3227         /*
3228          * When the SSL session is anonymous, or resumed via an abbreviated
3229          * handshake, no SCTs are provided as part of the handshake.  While in
3230          * a resumed session SCTs may be present in the session's certificate,
3231          * no callbacks are invoked to revalidate these, and in any case that
3232          * set of SCTs may be incomplete.  Thus it makes little sense to
3233          * attempt to display SCTs from a resumed session's certificate, and of
3234          * course none are associated with an anonymous peer.
3235          */
3236         if (peer != NULL && !SSL_session_reused(s) && SSL_ct_is_enabled(s)) {
3237             const STACK_OF(SCT) *scts = SSL_get0_peer_scts(s);
3238             int sct_count = scts != NULL ? sk_SCT_num(scts) : 0;
3239 
3240             BIO_printf(bio, "---\nSCTs present (%i)\n", sct_count);
3241             if (sct_count > 0) {
3242                 const CTLOG_STORE *log_store = SSL_CTX_get0_ctlog_store(ctx);
3243 
3244                 BIO_printf(bio, "---\n");
3245                 for (i = 0; i < sct_count; ++i) {
3246                     SCT *sct = sk_SCT_value(scts, i);
3247 
3248                     BIO_printf(bio, "SCT validation status: %s\n",
3249                                SCT_validation_status_string(sct));
3250                     SCT_print(sct, bio, 0, log_store);
3251                     if (i < sct_count - 1)
3252                         BIO_printf(bio, "\n---\n");
3253                 }
3254                 BIO_printf(bio, "\n");
3255             }
3256         }
3257 #endif
3258 
3259         BIO_printf(bio,
3260                    "---\nSSL handshake has read %ju bytes "
3261                    "and written %ju bytes\n",
3262                    BIO_number_read(SSL_get_rbio(s)),
3263                    BIO_number_written(SSL_get_wbio(s)));
3264     }
3265     print_verify_detail(s, bio);
3266     BIO_printf(bio, (SSL_session_reused(s) ? "---\nReused, " : "---\nNew, "));
3267     c = SSL_get_current_cipher(s);
3268     BIO_printf(bio, "%s, Cipher is %s\n",
3269                SSL_CIPHER_get_version(c), SSL_CIPHER_get_name(c));
3270     if (peer != NULL) {
3271         EVP_PKEY *pktmp;
3272 
3273         pktmp = X509_get0_pubkey(peer);
3274         BIO_printf(bio, "Server public key is %d bit\n",
3275                    EVP_PKEY_bits(pktmp));
3276     }
3277     BIO_printf(bio, "Secure Renegotiation IS%s supported\n",
3278                SSL_get_secure_renegotiation_support(s) ? "" : " NOT");
3279 #ifndef OPENSSL_NO_COMP
3280     comp = SSL_get_current_compression(s);
3281     expansion = SSL_get_current_expansion(s);
3282     BIO_printf(bio, "Compression: %s\n",
3283                comp ? SSL_COMP_get_name(comp) : "NONE");
3284     BIO_printf(bio, "Expansion: %s\n",
3285                expansion ? SSL_COMP_get_name(expansion) : "NONE");
3286 #endif
3287 #ifndef OPENSSL_NO_KTLS
3288     if (BIO_get_ktls_send(SSL_get_wbio(s)))
3289         BIO_printf(bio_err, "Using Kernel TLS for sending\n");
3290     if (BIO_get_ktls_recv(SSL_get_rbio(s)))
3291         BIO_printf(bio_err, "Using Kernel TLS for receiving\n");
3292 #endif
3293 
3294 #ifdef SSL_DEBUG
3295     {
3296         /* Print out local port of connection: useful for debugging */
3297         int sock;
3298         union BIO_sock_info_u info;
3299 
3300         sock = SSL_get_fd(s);
3301         if ((info.addr = BIO_ADDR_new()) != NULL
3302             && BIO_sock_info(sock, BIO_SOCK_INFO_ADDRESS, &info)) {
3303             BIO_printf(bio_c_out, "LOCAL PORT is %u\n",
3304                        ntohs(BIO_ADDR_rawport(info.addr)));
3305         }
3306         BIO_ADDR_free(info.addr);
3307     }
3308 #endif
3309 
3310 #if !defined(OPENSSL_NO_NEXTPROTONEG)
3311     if (next_proto.status != -1) {
3312         const unsigned char *proto;
3313         unsigned int proto_len;
3314         SSL_get0_next_proto_negotiated(s, &proto, &proto_len);
3315         BIO_printf(bio, "Next protocol: (%d) ", next_proto.status);
3316         BIO_write(bio, proto, proto_len);
3317         BIO_write(bio, "\n", 1);
3318     }
3319 #endif
3320     {
3321         const unsigned char *proto;
3322         unsigned int proto_len;
3323         SSL_get0_alpn_selected(s, &proto, &proto_len);
3324         if (proto_len > 0) {
3325             BIO_printf(bio, "ALPN protocol: ");
3326             BIO_write(bio, proto, proto_len);
3327             BIO_write(bio, "\n", 1);
3328         } else
3329             BIO_printf(bio, "No ALPN negotiated\n");
3330     }
3331 
3332 #ifndef OPENSSL_NO_SRTP
3333     {
3334         SRTP_PROTECTION_PROFILE *srtp_profile =
3335             SSL_get_selected_srtp_profile(s);
3336 
3337         if (srtp_profile)
3338             BIO_printf(bio, "SRTP Extension negotiated, profile=%s\n",
3339                        srtp_profile->name);
3340     }
3341 #endif
3342 
3343     if (istls13) {
3344         switch (SSL_get_early_data_status(s)) {
3345         case SSL_EARLY_DATA_NOT_SENT:
3346             BIO_printf(bio, "Early data was not sent\n");
3347             break;
3348 
3349         case SSL_EARLY_DATA_REJECTED:
3350             BIO_printf(bio, "Early data was rejected\n");
3351             break;
3352 
3353         case SSL_EARLY_DATA_ACCEPTED:
3354             BIO_printf(bio, "Early data was accepted\n");
3355             break;
3356 
3357         }
3358 
3359         /*
3360          * We also print the verify results when we dump session information,
3361          * but in TLSv1.3 we may not get that right away (or at all) depending
3362          * on when we get a NewSessionTicket. Therefore we print it now as well.
3363          */
3364         verify_result = SSL_get_verify_result(s);
3365         BIO_printf(bio, "Verify return code: %ld (%s)\n", verify_result,
3366                    X509_verify_cert_error_string(verify_result));
3367     } else {
3368         /* In TLSv1.3 we do this on arrival of a NewSessionTicket */
3369         SSL_SESSION_print(bio, SSL_get_session(s));
3370     }
3371 
3372     if (SSL_get_session(s) != NULL && keymatexportlabel != NULL) {
3373         BIO_printf(bio, "Keying material exporter:\n");
3374         BIO_printf(bio, "    Label: '%s'\n", keymatexportlabel);
3375         BIO_printf(bio, "    Length: %i bytes\n", keymatexportlen);
3376         exportedkeymat = app_malloc(keymatexportlen, "export key");
3377         if (!SSL_export_keying_material(s, exportedkeymat,
3378                                         keymatexportlen,
3379                                         keymatexportlabel,
3380                                         strlen(keymatexportlabel),
3381                                         NULL, 0, 0)) {
3382             BIO_printf(bio, "    Error\n");
3383         } else {
3384             BIO_printf(bio, "    Keying material: ");
3385             for (i = 0; i < keymatexportlen; i++)
3386                 BIO_printf(bio, "%02X", exportedkeymat[i]);
3387             BIO_printf(bio, "\n");
3388         }
3389         OPENSSL_free(exportedkeymat);
3390     }
3391     BIO_printf(bio, "---\n");
3392     X509_free(peer);
3393     /* flush, or debugging output gets mixed with http response */
3394     (void)BIO_flush(bio);
3395 }
3396 
3397 # ifndef OPENSSL_NO_OCSP
3398 static int ocsp_resp_cb(SSL *s, void *arg)
3399 {
3400     const unsigned char *p;
3401     int len;
3402     OCSP_RESPONSE *rsp;
3403     len = SSL_get_tlsext_status_ocsp_resp(s, &p);
3404     BIO_puts(arg, "OCSP response: ");
3405     if (p == NULL) {
3406         BIO_puts(arg, "no response sent\n");
3407         return 1;
3408     }
3409     rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
3410     if (rsp == NULL) {
3411         BIO_puts(arg, "response parse error\n");
3412         BIO_dump_indent(arg, (char *)p, len, 4);
3413         return 0;
3414     }
3415     BIO_puts(arg, "\n======================================\n");
3416     OCSP_RESPONSE_print(arg, rsp, 0);
3417     BIO_puts(arg, "======================================\n");
3418     OCSP_RESPONSE_free(rsp);
3419     return 1;
3420 }
3421 # endif
3422 
3423 static int ldap_ExtendedResponse_parse(const char *buf, long rem)
3424 {
3425     const unsigned char *cur, *end;
3426     long len;
3427     int tag, xclass, inf, ret = -1;
3428 
3429     cur = (const unsigned char *)buf;
3430     end = cur + rem;
3431 
3432     /*
3433      * From RFC 4511:
3434      *
3435      *    LDAPMessage ::= SEQUENCE {
3436      *         messageID       MessageID,
3437      *         protocolOp      CHOICE {
3438      *              ...
3439      *              extendedResp          ExtendedResponse,
3440      *              ... },
3441      *         controls       [0] Controls OPTIONAL }
3442      *
3443      *    ExtendedResponse ::= [APPLICATION 24] SEQUENCE {
3444      *         COMPONENTS OF LDAPResult,
3445      *         responseName     [10] LDAPOID OPTIONAL,
3446      *         responseValue    [11] OCTET STRING OPTIONAL }
3447      *
3448      *    LDAPResult ::= SEQUENCE {
3449      *         resultCode         ENUMERATED {
3450      *              success                      (0),
3451      *              ...
3452      *              other                        (80),
3453      *              ...  },
3454      *         matchedDN          LDAPDN,
3455      *         diagnosticMessage  LDAPString,
3456      *         referral           [3] Referral OPTIONAL }
3457      */
3458 
3459     /* pull SEQUENCE */
3460     inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3461     if (inf != V_ASN1_CONSTRUCTED || tag != V_ASN1_SEQUENCE ||
3462         (rem = end - cur, len > rem)) {
3463         BIO_printf(bio_err, "Unexpected LDAP response\n");
3464         goto end;
3465     }
3466 
3467     rem = len;  /* ensure that we don't overstep the SEQUENCE */
3468 
3469     /* pull MessageID */
3470     inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3471     if (inf != V_ASN1_UNIVERSAL || tag != V_ASN1_INTEGER ||
3472         (rem = end - cur, len > rem)) {
3473         BIO_printf(bio_err, "No MessageID\n");
3474         goto end;
3475     }
3476 
3477     cur += len; /* shall we check for MessageId match or just skip? */
3478 
3479     /* pull [APPLICATION 24] */
3480     rem = end - cur;
3481     inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3482     if (inf != V_ASN1_CONSTRUCTED || xclass != V_ASN1_APPLICATION ||
3483         tag != 24) {
3484         BIO_printf(bio_err, "Not ExtendedResponse\n");
3485         goto end;
3486     }
3487 
3488     /* pull resultCode */
3489     rem = end - cur;
3490     inf = ASN1_get_object(&cur, &len, &tag, &xclass, rem);
3491     if (inf != V_ASN1_UNIVERSAL || tag != V_ASN1_ENUMERATED || len == 0 ||
3492         (rem = end - cur, len > rem)) {
3493         BIO_printf(bio_err, "Not LDAPResult\n");
3494         goto end;
3495     }
3496 
3497     /* len should always be one, but just in case... */
3498     for (ret = 0, inf = 0; inf < len; inf++) {
3499         ret <<= 8;
3500         ret |= cur[inf];
3501     }
3502     /* There is more data, but we don't care... */
3503  end:
3504     return ret;
3505 }
3506 
3507 /*
3508  * Host dNS Name verifier: used for checking that the hostname is in dNS format
3509  * before setting it as SNI
3510  */
3511 static int is_dNS_name(const char *host)
3512 {
3513     const size_t MAX_LABEL_LENGTH = 63;
3514     size_t i;
3515     int isdnsname = 0;
3516     size_t length = strlen(host);
3517     size_t label_length = 0;
3518     int all_numeric = 1;
3519 
3520     /*
3521      * Deviation from strict DNS name syntax, also check names with '_'
3522      * Check DNS name syntax, any '-' or '.' must be internal,
3523      * and on either side of each '.' we can't have a '-' or '.'.
3524      *
3525      * If the name has just one label, we don't consider it a DNS name.
3526      */
3527     for (i = 0; i < length && label_length < MAX_LABEL_LENGTH; ++i) {
3528         char c = host[i];
3529 
3530         if ((c >= 'a' && c <= 'z')
3531             || (c >= 'A' && c <= 'Z')
3532             || c == '_') {
3533             label_length += 1;
3534             all_numeric = 0;
3535             continue;
3536         }
3537 
3538         if (c >= '0' && c <= '9') {
3539             label_length += 1;
3540             continue;
3541         }
3542 
3543         /* Dot and hyphen cannot be first or last. */
3544         if (i > 0 && i < length - 1) {
3545             if (c == '-') {
3546                 label_length += 1;
3547                 continue;
3548             }
3549             /*
3550              * Next to a dot the preceding and following characters must not be
3551              * another dot or a hyphen.  Otherwise, record that the name is
3552              * plausible, since it has two or more labels.
3553              */
3554             if (c == '.'
3555                 && host[i + 1] != '.'
3556                 && host[i - 1] != '-'
3557                 && host[i + 1] != '-') {
3558                 label_length = 0;
3559                 isdnsname = 1;
3560                 continue;
3561             }
3562         }
3563         isdnsname = 0;
3564         break;
3565     }
3566 
3567     /* dNS name must not be all numeric and labels must be shorter than 64 characters. */
3568     isdnsname &= !all_numeric && !(label_length == MAX_LABEL_LENGTH);
3569 
3570     return isdnsname;
3571 }
3572 #endif                          /* OPENSSL_NO_SOCK */
3573