xref: /freebsd/crypto/openssl/apps/ocsp.c (revision 4543ef516683042d46f3bd3bb8a4f3f746e00499)
1 /*
2  * Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 #include <openssl/opensslconf.h>
11 
12 #ifdef OPENSSL_SYS_VMS
13   /* So fd_set and friends get properly defined on OpenVMS */
14 # define _XOPEN_SOURCE_EXTENDED
15 #endif
16 
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <string.h>
20 #include <time.h>
21 #include <ctype.h>
22 
23 /* Needs to be included before the openssl headers */
24 #include "apps.h"
25 #include "http_server.h"
26 #include "progs.h"
27 #include "internal/sockets.h"
28 #include <openssl/e_os2.h>
29 #include <openssl/crypto.h>
30 #include <openssl/err.h>
31 #include <openssl/ssl.h>
32 #include <openssl/evp.h>
33 #include <openssl/bn.h>
34 #include <openssl/x509v3.h>
35 
36 #if defined(__TANDEM)
37 # if defined(OPENSSL_TANDEM_FLOSS)
38 #  include <floss.h(floss_fork)>
39 # endif
40 #endif
41 
42 #if defined(OPENSSL_SYS_VXWORKS)
43 /* not supported */
44 int setpgid(pid_t pid, pid_t pgid)
45 {
46     errno = ENOSYS;
47     return 0;
48 }
49 /* not supported */
50 pid_t fork(void)
51 {
52     errno = ENOSYS;
53     return (pid_t) -1;
54 }
55 #endif
56 /* Maximum leeway in validity period: default 5 minutes */
57 #define MAX_VALIDITY_PERIOD    (5 * 60)
58 
59 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
60                          const EVP_MD *cert_id_md, X509 *issuer,
61                          STACK_OF(OCSP_CERTID) *ids);
62 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
63                            const EVP_MD *cert_id_md, X509 *issuer,
64                            STACK_OF(OCSP_CERTID) *ids);
65 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
66                               STACK_OF(OPENSSL_STRING) *names,
67                               STACK_OF(OCSP_CERTID) *ids, long nsec,
68                               long maxage);
69 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
70                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
71                               EVP_PKEY *rkey, const EVP_MD *md,
72                               STACK_OF(OPENSSL_STRING) *sigopts,
73                               STACK_OF(X509) *rother, unsigned long flags,
74                               int nmin, int ndays, int badsig,
75                               const EVP_MD *resp_md);
76 
77 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
78 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
79                         const char *port, int timeout);
80 static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp);
81 static char *prog;
82 
83 #ifdef HTTP_DAEMON
84 static int index_changed(CA_DB *);
85 #endif
86 
87 typedef enum OPTION_choice {
88     OPT_COMMON,
89     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
90 #ifndef OPENSSL_NO_SOCK
91     OPT_PROXY, OPT_NO_PROXY,
92 #endif
93     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
94     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
95     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
96     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
97     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
98     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
99     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
100     OPT_NOCAPATH, OPT_NOCASTORE,
101     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
102     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
103     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
104     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
105     OPT_PASSIN,
106     OPT_RCID,
107     OPT_V_ENUM,
108     OPT_MD,
109     OPT_MULTI, OPT_PROV_ENUM
110 } OPTION_CHOICE;
111 
112 const OPTIONS ocsp_options[] = {
113     OPT_SECTION("General"),
114     {"help", OPT_HELP, '-', "Display this summary"},
115     {"ignore_err", OPT_IGNORE_ERR, '-',
116      "Ignore error on OCSP request or response and continue running"},
117     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
118     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
119     {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
120     {"no-CAfile", OPT_NOCAFILE, '-',
121      "Do not load the default certificates file"},
122     {"no-CApath", OPT_NOCAPATH, '-',
123      "Do not load certificates from the default certificates directory"},
124     {"no-CAstore", OPT_NOCASTORE, '-',
125      "Do not load certificates from the default certificates store"},
126 
127     OPT_SECTION("Responder"),
128     {"timeout", OPT_TIMEOUT, 'p',
129      "Connection timeout (in seconds) to the OCSP responder"},
130     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
131      "Don't include any certificates in response"},
132 #ifdef HTTP_DAEMON
133     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
134 #endif
135     {"no_certs", OPT_NO_CERTS, '-',
136      "Don't include any certificates in signed request"},
137     {"badsig", OPT_BADSIG, '-',
138         "Corrupt last byte of loaded OCSP response signature (for test)"},
139     {"CA", OPT_CA, '<', "CA certificate"},
140     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
141     {"nrequest", OPT_REQUEST, 'p',
142      "Number of requests to accept (default unlimited)"},
143     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
144     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
145     {"sign_other", OPT_SIGN_OTHER, '<',
146      "Additional certificates to include in signed request"},
147     {"index", OPT_INDEX, '<', "Certificate status index file"},
148     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
149     {"rsigner", OPT_RSIGNER, '<',
150      "Responder certificate to sign responses with"},
151     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
152     {"passin", OPT_PASSIN, 's', "Responder key pass phrase source"},
153     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
154     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
155     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
156     {"header", OPT_HEADER, 's', "key=value header to add"},
157     {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
158     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
159 
160     OPT_SECTION("Client"),
161     {"url", OPT_URL, 's', "Responder URL"},
162     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
163     {"port", OPT_PORT, 'N', "Port to run responder on"},
164     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
165 #ifndef OPENSSL_NO_SOCK
166     {"proxy", OPT_PROXY, 's',
167      "[http[s]://]host[:port][/path] of HTTP(S) proxy to use; path is ignored"},
168     {"no_proxy", OPT_NO_PROXY, 's',
169      "List of addresses of servers not to use HTTP(S) proxy for"},
170     {OPT_MORE_STR, 0, 0,
171      "Default from environment variable 'no_proxy', else 'NO_PROXY', else none"},
172 #endif
173     {"out", OPT_OUTFILE, '>', "Output filename"},
174     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
175     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
176     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
177     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
178      "Don't check signature on response"},
179     {"resp_key_id", OPT_RESP_KEY_ID, '-',
180      "Identify response by signing certificate key ID"},
181     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
182      "Don't check signing certificate"},
183     {"text", OPT_TEXT, '-', "Print text form of request and response"},
184     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
185     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
186     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
187     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
188      "Don't do additional checks on signing certificate"},
189     {"no_explicit", OPT_NO_EXPLICIT, '-',
190      "Do not explicitly check the chain, just verify the root"},
191     {"trust_other", OPT_TRUST_OTHER, '-',
192      "Don't verify additional certificates"},
193     {"no_intern", OPT_NO_INTERN, '-',
194      "Don't search certificates contained in response for signer"},
195     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
196     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
197     {"verify_other", OPT_VERIFY_OTHER, '<',
198      "Additional certificates to search for signer"},
199     {"cert", OPT_CERT, '<', "Certificate to check"},
200     {"serial", OPT_SERIAL, 's', "Serial number to check"},
201     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
202      "Maximum validity discrepancy in seconds"},
203     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
204     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
205     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
206     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
207     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
208 
209     OPT_V_OPTIONS,
210     OPT_PROV_OPTIONS,
211     {NULL}
212 };
213 
214 int ocsp_main(int argc, char **argv)
215 {
216     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
217     EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
218     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
219     int trailing_md = 0;
220     CA_DB *rdb = NULL;
221     EVP_PKEY *key = NULL, *rkey = NULL;
222     OCSP_BASICRESP *bs = NULL;
223     OCSP_REQUEST *req = NULL;
224     OCSP_RESPONSE *resp = NULL;
225     STACK_OF(CONF_VALUE) *headers = NULL;
226     STACK_OF(OCSP_CERTID) *ids = NULL;
227     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
228     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
229     STACK_OF(X509) *issuers = NULL;
230     X509 *issuer = NULL, *cert = NULL;
231     STACK_OF(X509) *rca_cert = NULL;
232     EVP_MD *resp_certid_md = NULL;
233     X509 *signer = NULL, *rsigner = NULL;
234     X509_STORE *store = NULL;
235     X509_VERIFY_PARAM *vpm = NULL;
236     const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
237     char *header, *value, *respdigname = NULL;
238     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
239 #ifndef OPENSSL_NO_SOCK
240     char *opt_proxy = NULL;
241     char *opt_no_proxy = NULL;
242 #endif
243     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
244     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
245     char *rsignfile = NULL, *rkeyfile = NULL;
246     char *passinarg = NULL, *passin = NULL;
247     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
248     char *signfile = NULL, *keyfile = NULL;
249     char *thost = NULL, *tport = NULL, *tpath = NULL;
250     int noCAfile = 0, noCApath = 0, noCAstore = 0;
251     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
252     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
253     int req_text = 0, resp_text = 0, res, ret = 1;
254     int req_timeout = -1;
255     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
256     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
257     OPTION_CHOICE o;
258 
259     if ((reqnames = sk_OPENSSL_STRING_new_null()) == NULL
260             || (ids = sk_OCSP_CERTID_new_null()) == NULL
261             || (vpm = X509_VERIFY_PARAM_new()) == NULL)
262         goto end;
263 
264     prog = opt_init(argc, argv, ocsp_options);
265     while ((o = opt_next()) != OPT_EOF) {
266         switch (o) {
267         case OPT_EOF:
268         case OPT_ERR:
269  opthelp:
270             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
271             goto end;
272         case OPT_HELP:
273             ret = 0;
274             opt_help(ocsp_options);
275             goto end;
276         case OPT_OUTFILE:
277             outfile = opt_arg();
278             break;
279         case OPT_TIMEOUT:
280 #ifndef OPENSSL_NO_SOCK
281             req_timeout = atoi(opt_arg());
282 #endif
283             break;
284         case OPT_URL:
285             OPENSSL_free(thost);
286             OPENSSL_free(tport);
287             OPENSSL_free(tpath);
288             thost = tport = tpath = NULL;
289             if (!OSSL_HTTP_parse_url(opt_arg(), &use_ssl, NULL /* userinfo */,
290                                      &host, &port, NULL /* port_num */,
291                                      &path, NULL /* qry */, NULL /* frag */)) {
292                 BIO_printf(bio_err, "%s Error parsing -url argument\n", prog);
293                 goto end;
294             }
295             thost = host;
296             tport = port;
297             tpath = path;
298             break;
299         case OPT_HOST:
300             host = opt_arg();
301             break;
302         case OPT_PORT:
303             port = opt_arg();
304             break;
305         case OPT_PATH:
306             path = opt_arg();
307             break;
308 #ifndef OPENSSL_NO_SOCK
309         case OPT_PROXY:
310             opt_proxy = opt_arg();
311             break;
312         case OPT_NO_PROXY:
313             opt_no_proxy = opt_arg();
314             break;
315 #endif
316         case OPT_IGNORE_ERR:
317             ignore_err = 1;
318             break;
319         case OPT_NOVERIFY:
320             noverify = 1;
321             break;
322         case OPT_NONCE:
323             add_nonce = 2;
324             break;
325         case OPT_NO_NONCE:
326             add_nonce = 0;
327             break;
328         case OPT_RESP_NO_CERTS:
329             rflags |= OCSP_NOCERTS;
330             break;
331         case OPT_RESP_KEY_ID:
332             rflags |= OCSP_RESPID_KEY;
333             break;
334         case OPT_NO_CERTS:
335             sign_flags |= OCSP_NOCERTS;
336             break;
337         case OPT_NO_SIGNATURE_VERIFY:
338             verify_flags |= OCSP_NOSIGS;
339             break;
340         case OPT_NO_CERT_VERIFY:
341             verify_flags |= OCSP_NOVERIFY;
342             break;
343         case OPT_NO_CHAIN:
344             verify_flags |= OCSP_NOCHAIN;
345             break;
346         case OPT_NO_CERT_CHECKS:
347             verify_flags |= OCSP_NOCHECKS;
348             break;
349         case OPT_NO_EXPLICIT:
350             verify_flags |= OCSP_NOEXPLICIT;
351             break;
352         case OPT_TRUST_OTHER:
353             verify_flags |= OCSP_TRUSTOTHER;
354             break;
355         case OPT_NO_INTERN:
356             verify_flags |= OCSP_NOINTERN;
357             break;
358         case OPT_BADSIG:
359             badsig = 1;
360             break;
361         case OPT_TEXT:
362             req_text = resp_text = 1;
363             break;
364         case OPT_REQ_TEXT:
365             req_text = 1;
366             break;
367         case OPT_RESP_TEXT:
368             resp_text = 1;
369             break;
370         case OPT_REQIN:
371             reqin = opt_arg();
372             break;
373         case OPT_RESPIN:
374             respin = opt_arg();
375             break;
376         case OPT_SIGNER:
377             signfile = opt_arg();
378             break;
379         case OPT_VAFILE:
380             verify_certfile = opt_arg();
381             verify_flags |= OCSP_TRUSTOTHER;
382             break;
383         case OPT_SIGN_OTHER:
384             sign_certfile = opt_arg();
385             break;
386         case OPT_VERIFY_OTHER:
387             verify_certfile = opt_arg();
388             break;
389         case OPT_CAFILE:
390             CAfile = opt_arg();
391             break;
392         case OPT_CAPATH:
393             CApath = opt_arg();
394             break;
395         case OPT_CASTORE:
396             CAstore = opt_arg();
397             break;
398         case OPT_NOCAFILE:
399             noCAfile = 1;
400             break;
401         case OPT_NOCAPATH:
402             noCApath = 1;
403             break;
404         case OPT_NOCASTORE:
405             noCAstore = 1;
406             break;
407         case OPT_V_CASES:
408             if (!opt_verify(o, vpm))
409                 goto end;
410             vpmtouched++;
411             break;
412         case OPT_VALIDITY_PERIOD:
413             opt_long(opt_arg(), &nsec);
414             break;
415         case OPT_STATUS_AGE:
416             opt_long(opt_arg(), &maxage);
417             break;
418         case OPT_SIGNKEY:
419             keyfile = opt_arg();
420             break;
421         case OPT_REQOUT:
422             reqout = opt_arg();
423             break;
424         case OPT_RESPOUT:
425             respout = opt_arg();
426             break;
427         case OPT_ISSUER:
428             issuer = load_cert(opt_arg(), FORMAT_UNDEF, "issuer certificate");
429             if (issuer == NULL)
430                 goto end;
431             if (issuers == NULL) {
432                 if ((issuers = sk_X509_new_null()) == NULL)
433                     goto end;
434             }
435             if (!sk_X509_push(issuers, issuer))
436                 goto end;
437             break;
438         case OPT_CERT:
439             X509_free(cert);
440             cert = load_cert(opt_arg(), FORMAT_UNDEF, "certificate");
441             if (cert == NULL)
442                 goto end;
443             if (cert_id_md == NULL)
444                 cert_id_md = (EVP_MD *)EVP_sha1();
445             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
446                 goto end;
447             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
448                 goto end;
449             trailing_md = 0;
450             break;
451         case OPT_SERIAL:
452             if (cert_id_md == NULL)
453                 cert_id_md = (EVP_MD *)EVP_sha1();
454             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
455                 goto end;
456             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
457                 goto end;
458             trailing_md = 0;
459             break;
460         case OPT_INDEX:
461             ridx_filename = opt_arg();
462             break;
463         case OPT_CA:
464             rca_filename = opt_arg();
465             break;
466         case OPT_NMIN:
467             nmin = opt_int_arg();
468             if (ndays == -1)
469                 ndays = 0;
470             break;
471         case OPT_REQUEST:
472             accept_count = opt_int_arg();
473             break;
474         case OPT_NDAYS:
475             ndays = atoi(opt_arg());
476             break;
477         case OPT_RSIGNER:
478             rsignfile = opt_arg();
479             break;
480         case OPT_RKEY:
481             rkeyfile = opt_arg();
482             break;
483         case OPT_PASSIN:
484             passinarg = opt_arg();
485             break;
486         case OPT_ROTHER:
487             rcertfile = opt_arg();
488             break;
489         case OPT_RMD:   /* Response MessageDigest */
490             respdigname = opt_arg();
491             break;
492         case OPT_RSIGOPT:
493             if (rsign_sigopts == NULL)
494                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
495             if (rsign_sigopts == NULL
496                 || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
497                 goto end;
498             break;
499         case OPT_HEADER:
500             header = opt_arg();
501             value = strchr(header, '=');
502             if (value == NULL) {
503                 BIO_printf(bio_err, "Missing = in header key=value\n");
504                 goto opthelp;
505             }
506             *value++ = '\0';
507             if (!X509V3_add_value(header, value, &headers))
508                 goto end;
509             break;
510         case OPT_RCID:
511             if (!opt_md(opt_arg(), &resp_certid_md))
512                 goto opthelp;
513             break;
514         case OPT_MD:
515             if (trailing_md) {
516                 BIO_printf(bio_err,
517                            "%s: Digest must be before -cert or -serial\n",
518                            prog);
519                 goto opthelp;
520             }
521             if (!opt_md(opt_unknown(), &cert_id_md))
522                 goto opthelp;
523             trailing_md = 1;
524             break;
525         case OPT_MULTI:
526 #ifdef HTTP_DAEMON
527             multi = atoi(opt_arg());
528 #endif
529             break;
530         case OPT_PROV_CASES:
531             if (!opt_provider(o))
532                 goto end;
533             break;
534         }
535     }
536 
537     /* No extra arguments. */
538     argc = opt_num_rest();
539     if (argc != 0)
540         goto opthelp;
541 
542     if (trailing_md) {
543         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
544                    prog);
545         goto opthelp;
546     }
547 
548     if (respdigname != NULL) {
549         if (!opt_md(respdigname, &rsign_md))
550             goto end;
551     }
552 
553     /* Have we anything to do? */
554     if (req == NULL && reqin == NULL
555         && respin == NULL && !(port != NULL && ridx_filename != NULL))
556         goto opthelp;
557 
558     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
559     if (out == NULL)
560         goto end;
561 
562     if (req == NULL && (add_nonce != 2))
563         add_nonce = 0;
564 
565     if (req == NULL && reqin != NULL) {
566         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
567         if (derbio == NULL)
568             goto end;
569         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
570         BIO_free(derbio);
571         if (req == NULL) {
572             BIO_printf(bio_err, "Error reading OCSP request\n");
573             goto end;
574         }
575     }
576 
577     if (req == NULL && port != NULL) {
578 #ifndef OPENSSL_NO_SOCK
579         acbio = http_server_init_bio(prog, port);
580         if (acbio == NULL)
581             goto end;
582 #else
583         BIO_printf(bio_err, "Cannot act as server - sockets not supported\n");
584         goto end;
585 #endif
586     }
587 
588     if (rsignfile != NULL) {
589         if (rkeyfile == NULL)
590             rkeyfile = rsignfile;
591         rsigner = load_cert(rsignfile, FORMAT_UNDEF, "responder certificate");
592         if (rsigner == NULL) {
593             BIO_printf(bio_err, "Error loading responder certificate\n");
594             goto end;
595         }
596         if (!load_certs(rca_filename, 0, &rca_cert, NULL, "CA certificates"))
597             goto end;
598         if (rcertfile != NULL) {
599             if (!load_certs(rcertfile, 0, &rother, NULL,
600                             "responder other certificates"))
601                 goto end;
602         }
603         if (!app_passwd(passinarg, NULL, &passin, NULL)) {
604             BIO_printf(bio_err, "Error getting password\n");
605             goto end;
606         }
607         rkey = load_key(rkeyfile, FORMAT_UNDEF, 0, passin, NULL,
608                         "responder private key");
609         if (rkey == NULL)
610             goto end;
611     }
612 
613     if (ridx_filename != NULL
614         && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
615         BIO_printf(bio_err,
616                    "Responder mode requires certificate, key, and CA.\n");
617         goto end;
618     }
619 
620     if (ridx_filename != NULL) {
621         rdb = load_index(ridx_filename, NULL);
622         if (rdb == NULL || index_index(rdb) <= 0) {
623             BIO_printf(bio_err,
624                 "Problem with index file: %s (could not load/parse file)\n",
625                 ridx_filename);
626             ret = 1;
627             goto end;
628         }
629     }
630 
631 #ifdef HTTP_DAEMON
632     if (multi && acbio != NULL)
633         spawn_loop(prog);
634     if (acbio != NULL && req_timeout > 0)
635         signal(SIGALRM, socket_timeout);
636 #endif
637 
638     if (acbio != NULL)
639         log_message(prog, LOG_INFO, "waiting for OCSP client connections...");
640 
641 redo_accept:
642 
643     if (acbio != NULL) {
644 #ifdef HTTP_DAEMON
645         if (index_changed(rdb)) {
646             CA_DB *newrdb = load_index(ridx_filename, NULL);
647 
648             if (newrdb != NULL && index_index(newrdb) > 0) {
649                 free_index(rdb);
650                 rdb = newrdb;
651             } else {
652                 free_index(newrdb);
653                 log_message(prog, LOG_ERR, "error reloading updated index: %s",
654                             ridx_filename);
655             }
656         }
657 #endif
658 
659         req = NULL;
660         res = do_responder(&req, &cbio, acbio, port, req_timeout);
661         if (res == 0)
662             goto redo_accept;
663 
664         if (req == NULL) {
665             if (res == 1) {
666                 resp =
667                     OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
668                                          NULL);
669                 send_ocsp_response(cbio, resp);
670             }
671             goto done_resp;
672         }
673     }
674 
675     if (req == NULL
676         && (signfile != NULL || reqout != NULL
677             || host != NULL || add_nonce || ridx_filename != NULL)) {
678         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
679         goto end;
680     }
681 
682     if (req != NULL && add_nonce) {
683         if (!OCSP_request_add1_nonce(req, NULL, -1))
684             goto end;
685     }
686 
687     if (signfile != NULL) {
688         if (keyfile == NULL)
689             keyfile = signfile;
690         signer = load_cert(signfile, FORMAT_UNDEF, "signer certificate");
691         if (signer == NULL) {
692             BIO_printf(bio_err, "Error loading signer certificate\n");
693             goto end;
694         }
695         if (sign_certfile != NULL) {
696             if (!load_certs(sign_certfile, 0, &sign_other, NULL,
697                             "signer certificates"))
698                 goto end;
699         }
700         key = load_key(keyfile, FORMAT_UNDEF, 0, NULL, NULL,
701                        "signer private key");
702         if (key == NULL)
703             goto end;
704 
705         if (!OCSP_request_sign(req, signer, key, NULL,
706                                sign_other, sign_flags)) {
707             BIO_printf(bio_err, "Error signing OCSP request\n");
708             goto end;
709         }
710     }
711 
712     if (req_text && req != NULL)
713         OCSP_REQUEST_print(out, req, 0);
714 
715     if (reqout != NULL) {
716         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
717         if (derbio == NULL)
718             goto end;
719         i2d_OCSP_REQUEST_bio(derbio, req);
720         BIO_free(derbio);
721     }
722 
723     if (rdb != NULL) {
724         make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
725                            rsign_md, rsign_sigopts, rother, rflags, nmin, ndays,
726                            badsig, resp_certid_md);
727         if (resp == NULL)
728             goto end;
729         if (cbio != NULL)
730             send_ocsp_response(cbio, resp);
731     } else if (host != NULL) {
732 #ifndef OPENSSL_NO_SOCK
733         resp = process_responder(req, host, port, path, opt_proxy, opt_no_proxy,
734                                  use_ssl, headers, req_timeout);
735         if (resp == NULL)
736             goto end;
737 #else
738         BIO_printf(bio_err,
739                    "Error creating connect BIO - sockets not supported\n");
740         goto end;
741 #endif
742     } else if (respin != NULL) {
743         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
744         if (derbio == NULL)
745             goto end;
746         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
747         BIO_free(derbio);
748         if (resp == NULL) {
749             BIO_printf(bio_err, "Error reading OCSP response\n");
750             goto end;
751         }
752     } else {
753         ret = 0;
754         goto end;
755     }
756 
757  done_resp:
758 
759     if (respout != NULL) {
760         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
761         if (derbio == NULL)
762             goto end;
763         i2d_OCSP_RESPONSE_bio(derbio, resp);
764         BIO_free(derbio);
765     }
766 
767     i = OCSP_response_status(resp);
768     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
769         BIO_printf(out, "Responder Error: %s (%d)\n",
770                    OCSP_response_status_str(i), i);
771         if (!ignore_err)
772                 goto end;
773     }
774 
775     if (resp_text)
776         OCSP_RESPONSE_print(out, resp, 0);
777 
778     /* If running as responder don't verify our own response */
779     if (cbio != NULL) {
780         /* If not unlimited, see if we took all we should. */
781         if (accept_count != -1 && --accept_count <= 0) {
782             ret = 0;
783             goto end;
784         }
785         BIO_free_all(cbio);
786         cbio = NULL;
787         OCSP_REQUEST_free(req);
788         req = NULL;
789         OCSP_RESPONSE_free(resp);
790         resp = NULL;
791         goto redo_accept;
792     }
793     if (ridx_filename != NULL) {
794         ret = 0;
795         goto end;
796     }
797 
798     if (store == NULL) {
799         store = setup_verify(CAfile, noCAfile, CApath, noCApath,
800                              CAstore, noCAstore);
801         if (!store)
802             goto end;
803     }
804     if (vpmtouched)
805         X509_STORE_set1_param(store, vpm);
806     if (verify_certfile != NULL) {
807         if (!load_certs(verify_certfile, 0, &verify_other, NULL,
808                         "validator certificates"))
809             goto end;
810     }
811 
812     bs = OCSP_response_get1_basic(resp);
813     if (bs == NULL) {
814         BIO_printf(bio_err, "Error parsing response\n");
815         goto end;
816     }
817 
818     ret = 0;
819 
820     if (!noverify) {
821         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
822             if (i == -1)
823                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
824             else {
825                 BIO_printf(bio_err, "Nonce Verify error\n");
826                 ret = 1;
827                 goto end;
828             }
829         }
830 
831         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
832         if (i <= 0 && issuers) {
833             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
834             if (i > 0)
835                 ERR_clear_error();
836         }
837         if (i <= 0) {
838             BIO_printf(bio_err, "Response Verify Failure\n");
839             ERR_print_errors(bio_err);
840             ret = 1;
841         } else {
842             BIO_printf(bio_err, "Response verify OK\n");
843         }
844     }
845 
846     if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
847         ret = 1;
848 
849  end:
850     ERR_print_errors(bio_err);
851     X509_free(signer);
852     X509_STORE_free(store);
853     X509_VERIFY_PARAM_free(vpm);
854     sk_OPENSSL_STRING_free(rsign_sigopts);
855     EVP_PKEY_free(key);
856     EVP_PKEY_free(rkey);
857     EVP_MD_free(cert_id_md);
858     EVP_MD_free(rsign_md);
859     EVP_MD_free(resp_certid_md);
860     X509_free(cert);
861     sk_X509_pop_free(issuers, X509_free);
862     X509_free(rsigner);
863     sk_X509_pop_free(rca_cert, X509_free);
864     free_index(rdb);
865     BIO_free_all(cbio);
866     BIO_free_all(acbio);
867     BIO_free_all(out);
868     OCSP_REQUEST_free(req);
869     OCSP_RESPONSE_free(resp);
870     OCSP_BASICRESP_free(bs);
871     sk_OPENSSL_STRING_free(reqnames);
872     sk_OCSP_CERTID_free(ids);
873     sk_X509_pop_free(sign_other, X509_free);
874     sk_X509_pop_free(verify_other, X509_free);
875     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
876     OPENSSL_free(thost);
877     OPENSSL_free(tport);
878     OPENSSL_free(tpath);
879 
880     return ret;
881 }
882 
883 #ifdef HTTP_DAEMON
884 
885 static int index_changed(CA_DB *rdb)
886 {
887     struct stat sb;
888 
889     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
890         if (rdb->dbst.st_mtime != sb.st_mtime
891             || rdb->dbst.st_ctime != sb.st_ctime
892             || rdb->dbst.st_ino != sb.st_ino
893             || rdb->dbst.st_dev != sb.st_dev) {
894             syslog(LOG_INFO, "index file changed, reloading");
895             return 1;
896         }
897     }
898     return 0;
899 }
900 
901 #endif
902 
903 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
904                          const EVP_MD *cert_id_md, X509 *issuer,
905                          STACK_OF(OCSP_CERTID) *ids)
906 {
907     OCSP_CERTID *id;
908 
909     if (issuer == NULL) {
910         BIO_printf(bio_err, "No issuer certificate specified\n");
911         return 0;
912     }
913     if (*req == NULL)
914         *req = OCSP_REQUEST_new();
915     if (*req == NULL)
916         goto err;
917     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
918     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
919         goto err;
920     if (!OCSP_request_add0_id(*req, id))
921         goto err;
922     return 1;
923 
924  err:
925     BIO_printf(bio_err, "Error Creating OCSP request\n");
926     return 0;
927 }
928 
929 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
930                            const EVP_MD *cert_id_md, X509 *issuer,
931                            STACK_OF(OCSP_CERTID) *ids)
932 {
933     OCSP_CERTID *id;
934     const X509_NAME *iname;
935     ASN1_BIT_STRING *ikey;
936     ASN1_INTEGER *sno;
937 
938     if (issuer == NULL) {
939         BIO_printf(bio_err, "No issuer certificate specified\n");
940         return 0;
941     }
942     if (*req == NULL)
943         *req = OCSP_REQUEST_new();
944     if (*req == NULL)
945         goto err;
946     iname = X509_get_subject_name(issuer);
947     ikey = X509_get0_pubkey_bitstr(issuer);
948     sno = s2i_ASN1_INTEGER(NULL, serial);
949     if (sno == NULL) {
950         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
951         return 0;
952     }
953     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
954     ASN1_INTEGER_free(sno);
955     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
956         goto err;
957     if (!OCSP_request_add0_id(*req, id))
958         goto err;
959     return 1;
960 
961  err:
962     BIO_printf(bio_err, "Error Creating OCSP request\n");
963     return 0;
964 }
965 
966 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
967                               STACK_OF(OPENSSL_STRING) *names,
968                               STACK_OF(OCSP_CERTID) *ids, long nsec,
969                               long maxage)
970 {
971     OCSP_CERTID *id;
972     const char *name;
973     int i, status, reason;
974     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
975     int ret = 1;
976 
977     if (req == NULL || !sk_OPENSSL_STRING_num(names))
978         return 1;
979 
980     if (bs == NULL || !sk_OCSP_CERTID_num(ids))
981         return 0;
982 
983     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
984         id = sk_OCSP_CERTID_value(ids, i);
985         name = sk_OPENSSL_STRING_value(names, i);
986         BIO_printf(out, "%s: ", name);
987 
988         if (!OCSP_resp_find_status(bs, id, &status, &reason,
989                                    &rev, &thisupd, &nextupd)) {
990             BIO_puts(out, "ERROR: No Status found.\n");
991             ret = 0;
992             continue;
993         }
994 
995         /*
996          * Check validity: if invalid write to output BIO so we know which
997          * response this refers to.
998          */
999         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1000             BIO_puts(out, "WARNING: Status times invalid.\n");
1001             ERR_print_errors(out);
1002         }
1003         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1004 
1005         BIO_puts(out, "\tThis Update: ");
1006         ASN1_GENERALIZEDTIME_print(out, thisupd);
1007         BIO_puts(out, "\n");
1008 
1009         if (nextupd) {
1010             BIO_puts(out, "\tNext Update: ");
1011             ASN1_GENERALIZEDTIME_print(out, nextupd);
1012             BIO_puts(out, "\n");
1013         }
1014 
1015         if (status != V_OCSP_CERTSTATUS_REVOKED)
1016             continue;
1017 
1018         if (reason != -1)
1019             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1020 
1021         BIO_puts(out, "\tRevocation Time: ");
1022         ASN1_GENERALIZEDTIME_print(out, rev);
1023         BIO_puts(out, "\n");
1024     }
1025     return ret;
1026 }
1027 
1028 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1029                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1030                               EVP_PKEY *rkey, const EVP_MD *rmd,
1031                               STACK_OF(OPENSSL_STRING) *sigopts,
1032                               STACK_OF(X509) *rother, unsigned long flags,
1033                               int nmin, int ndays, int badsig,
1034                               const EVP_MD *resp_md)
1035 {
1036     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1037     OCSP_CERTID *cid;
1038     OCSP_BASICRESP *bs = NULL;
1039     int i, id_count;
1040     EVP_MD_CTX *mctx = NULL;
1041     EVP_PKEY_CTX *pkctx = NULL;
1042 
1043     id_count = OCSP_request_onereq_count(req);
1044 
1045     if (id_count <= 0) {
1046         *resp =
1047             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1048         goto end;
1049     }
1050 
1051     bs = OCSP_BASICRESP_new();
1052     thisupd = X509_gmtime_adj(NULL, 0);
1053     if (ndays != -1)
1054         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1055 
1056     /* Examine each certificate id in the request */
1057     for (i = 0; i < id_count; i++) {
1058         OCSP_ONEREQ *one;
1059         ASN1_INTEGER *serial;
1060         char **inf;
1061         int jj;
1062         int found = 0;
1063         ASN1_OBJECT *cert_id_md_oid;
1064         const EVP_MD *cert_id_md;
1065         OCSP_CERTID *cid_resp_md = NULL;
1066 
1067         one = OCSP_request_onereq_get0(req, i);
1068         cid = OCSP_onereq_get0_id(one);
1069 
1070         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1071 
1072         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1073         if (cert_id_md == NULL) {
1074             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1075                                          NULL);
1076             goto end;
1077         }
1078         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1079             X509 *ca_cert = sk_X509_value(ca, jj);
1080             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1081 
1082             if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1083                 found = 1;
1084                 if (resp_md != NULL)
1085                     cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1086             }
1087             OCSP_CERTID_free(ca_id);
1088         }
1089         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1090         inf = lookup_serial(db, serial);
1091 
1092         /* at this point, we can have cid be an alias of cid_resp_md */
1093         cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1094 
1095         if (!found) {
1096             OCSP_basic_add1_status(bs, cid,
1097                                    V_OCSP_CERTSTATUS_UNKNOWN,
1098                                    0, NULL, thisupd, nextupd);
1099             continue;
1100         }
1101         if (inf == NULL) {
1102             OCSP_basic_add1_status(bs, cid,
1103                                    V_OCSP_CERTSTATUS_UNKNOWN,
1104                                    0, NULL, thisupd, nextupd);
1105         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1106             OCSP_basic_add1_status(bs, cid,
1107                                    V_OCSP_CERTSTATUS_GOOD,
1108                                    0, NULL, thisupd, nextupd);
1109         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1110             ASN1_OBJECT *inst = NULL;
1111             ASN1_TIME *revtm = NULL;
1112             ASN1_GENERALIZEDTIME *invtm = NULL;
1113             OCSP_SINGLERESP *single;
1114             int reason = -1;
1115 
1116             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1117             single = OCSP_basic_add1_status(bs, cid,
1118                                             V_OCSP_CERTSTATUS_REVOKED,
1119                                             reason, revtm, thisupd, nextupd);
1120             if (single == NULL) {
1121                 *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1122                                              NULL);
1123                 goto end;
1124             }
1125             if (invtm != NULL)
1126                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1127                                              invtm, 0, 0);
1128             else if (inst != NULL)
1129                 OCSP_SINGLERESP_add1_ext_i2d(single,
1130                                              NID_hold_instruction_code, inst,
1131                                              0, 0);
1132             ASN1_OBJECT_free(inst);
1133             ASN1_TIME_free(revtm);
1134             ASN1_GENERALIZEDTIME_free(invtm);
1135         }
1136         OCSP_CERTID_free(cid_resp_md);
1137     }
1138 
1139     OCSP_copy_nonce(bs, req);
1140 
1141     mctx = EVP_MD_CTX_new();
1142     if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1143         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1144         goto end;
1145     }
1146     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1147         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1148 
1149         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1150             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1151             ERR_print_errors(bio_err);
1152             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1153                                          NULL);
1154             goto end;
1155         }
1156     }
1157     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1158         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1159         goto end;
1160     }
1161 
1162     if (badsig) {
1163         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1164         corrupt_signature(sig);
1165     }
1166 
1167     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1168 
1169  end:
1170     EVP_MD_CTX_free(mctx);
1171     ASN1_TIME_free(thisupd);
1172     ASN1_TIME_free(nextupd);
1173     OCSP_BASICRESP_free(bs);
1174 }
1175 
1176 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1177 {
1178     int i;
1179     BIGNUM *bn = NULL;
1180     char *itmp, *row[DB_NUMBER], **rrow;
1181     for (i = 0; i < DB_NUMBER; i++)
1182         row[i] = NULL;
1183     bn = ASN1_INTEGER_to_BN(ser, NULL);
1184     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1185                                  * point and abort */
1186     if (BN_is_zero(bn)) {
1187         itmp = OPENSSL_strdup("00");
1188         OPENSSL_assert(itmp);
1189     } else {
1190         itmp = BN_bn2hex(bn);
1191     }
1192     row[DB_serial] = itmp;
1193     BN_free(bn);
1194     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1195     OPENSSL_free(itmp);
1196     return rrow;
1197 }
1198 
1199 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1200                         const char *port, int timeout)
1201 {
1202 #ifndef OPENSSL_NO_SOCK
1203     return http_server_get_asn1_req(ASN1_ITEM_rptr(OCSP_REQUEST),
1204                                     (ASN1_VALUE **)preq, NULL, pcbio, acbio,
1205                                     NULL /* found_keep_alive */,
1206                                     prog, port, 1 /* accept_get */, timeout);
1207 #else
1208     BIO_printf(bio_err,
1209                "Error getting OCSP request - sockets not supported\n");
1210     *preq = NULL;
1211     return 0;
1212 #endif
1213 }
1214 
1215 static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp)
1216 {
1217 #ifndef OPENSSL_NO_SOCK
1218     return http_server_send_asn1_resp(cbio,
1219                                       0 /* no keep-alive */,
1220                                       "application/ocsp-response",
1221                                       ASN1_ITEM_rptr(OCSP_RESPONSE),
1222                                       (const ASN1_VALUE *)resp);
1223 #else
1224     BIO_printf(bio_err,
1225                "Error sending OCSP response - sockets not supported\n");
1226     return 0;
1227 #endif
1228 }
1229 
1230 #ifndef OPENSSL_NO_SOCK
1231 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req, const char *host,
1232                                  const char *port, const char *path,
1233                                  const char *proxy, const char *no_proxy,
1234                                  int use_ssl, STACK_OF(CONF_VALUE) *headers,
1235                                  int req_timeout)
1236 {
1237     SSL_CTX *ctx = NULL;
1238     OCSP_RESPONSE *resp = NULL;
1239 
1240     if (use_ssl == 1) {
1241         ctx = SSL_CTX_new(TLS_client_method());
1242         if (ctx == NULL) {
1243             BIO_printf(bio_err, "Error creating SSL context.\n");
1244             goto end;
1245         }
1246     }
1247 
1248     resp = (OCSP_RESPONSE *)
1249         app_http_post_asn1(host, port, path, proxy, no_proxy,
1250                            ctx, headers, "application/ocsp-request",
1251                            (ASN1_VALUE *)req, ASN1_ITEM_rptr(OCSP_REQUEST),
1252                            "application/ocsp-response",
1253                            req_timeout, ASN1_ITEM_rptr(OCSP_RESPONSE));
1254 
1255     if (resp == NULL)
1256         BIO_printf(bio_err, "Error querying OCSP responder\n");
1257 
1258  end:
1259     SSL_CTX_free(ctx);
1260     return resp;
1261 }
1262 #endif
1263