1 /*
2 * Copyright 1995-2021 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 <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/buffer.h>
13 #include <openssl/bn.h>
14 #include <openssl/objects.h>
15 #include <openssl/x509.h>
16 #include <openssl/x509v3.h>
17 #include "crypto/asn1.h"
18 #include "crypto/x509.h"
19
20 #ifndef OPENSSL_NO_STDIO
X509_print_fp(FILE * fp,X509 * x)21 int X509_print_fp(FILE *fp, X509 *x)
22 {
23 return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
24 }
25
X509_print_ex_fp(FILE * fp,X509 * x,unsigned long nmflag,unsigned long cflag)26 int X509_print_ex_fp(FILE *fp, X509 *x, unsigned long nmflag,
27 unsigned long cflag)
28 {
29 BIO *b;
30 int ret;
31
32 if ((b = BIO_new(BIO_s_file())) == NULL) {
33 ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
34 return 0;
35 }
36 BIO_set_fp(b, fp, BIO_NOCLOSE);
37 ret = X509_print_ex(b, x, nmflag, cflag);
38 BIO_free(b);
39 return ret;
40 }
41 #endif
42
X509_print(BIO * bp,X509 * x)43 int X509_print(BIO *bp, X509 *x)
44 {
45 return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
46 }
47
X509_print_ex(BIO * bp,X509 * x,unsigned long nmflags,unsigned long cflag)48 int X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags,
49 unsigned long cflag)
50 {
51 long l;
52 int ret = 0, i;
53 char *m = NULL, mlch = ' ';
54 int nmindent = 0, printok = 0;
55 EVP_PKEY *pkey = NULL;
56 const char *neg;
57
58 if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
59 mlch = '\n';
60 nmindent = 12;
61 }
62
63 if (nmflags == XN_FLAG_COMPAT)
64 printok = 1;
65
66 if (!(cflag & X509_FLAG_NO_HEADER)) {
67 if (BIO_write(bp, "Certificate:\n", 13) <= 0)
68 goto err;
69 if (BIO_write(bp, " Data:\n", 10) <= 0)
70 goto err;
71 }
72 if (!(cflag & X509_FLAG_NO_VERSION)) {
73 l = X509_get_version(x);
74 if (l >= X509_VERSION_1 && l <= X509_VERSION_3) {
75 if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n", "", l + 1, (unsigned long)l) <= 0)
76 goto err;
77 } else {
78 if (BIO_printf(bp, "%8sVersion: Unknown (%ld)\n", "", l) <= 0)
79 goto err;
80 }
81 }
82 if (!(cflag & X509_FLAG_NO_SERIAL)) {
83 const ASN1_INTEGER *bs = X509_get0_serialNumber(x);
84
85 if (BIO_write(bp, " Serial Number:", 22) <= 0)
86 goto err;
87
88 if (bs->length <= (int)sizeof(long)) {
89 ERR_set_mark();
90 l = ASN1_INTEGER_get(bs);
91 ERR_pop_to_mark();
92 } else {
93 l = -1;
94 }
95 if (l != -1) {
96 unsigned long ul;
97 if (bs->type == V_ASN1_NEG_INTEGER) {
98 ul = 0 - (unsigned long)l;
99 neg = "-";
100 } else {
101 ul = l;
102 neg = "";
103 }
104 if (BIO_printf(bp, " %s%lu (%s0x%lx)\n", neg, ul, neg, ul) <= 0)
105 goto err;
106 } else {
107 neg = (bs->type == V_ASN1_NEG_INTEGER) ? " (Negative)" : "";
108 if (BIO_printf(bp, "\n%12s%s", "", neg) <= 0)
109 goto err;
110
111 for (i = 0; i < bs->length; i++) {
112 if (BIO_printf(bp, "%02x%c", bs->data[i],
113 ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
114 goto err;
115 }
116 }
117
118 }
119
120 if (!(cflag & X509_FLAG_NO_SIGNAME)) {
121 const X509_ALGOR *tsig_alg = X509_get0_tbs_sigalg(x);
122
123 if (BIO_puts(bp, " ") <= 0)
124 goto err;
125 if (X509_signature_print(bp, tsig_alg, NULL) <= 0)
126 goto err;
127 }
128
129 if (!(cflag & X509_FLAG_NO_ISSUER)) {
130 if (BIO_printf(bp, " Issuer:%c", mlch) <= 0)
131 goto err;
132 if (X509_NAME_print_ex(bp, X509_get_issuer_name(x), nmindent, nmflags)
133 < printok)
134 goto err;
135 if (BIO_write(bp, "\n", 1) <= 0)
136 goto err;
137 }
138 if (!(cflag & X509_FLAG_NO_VALIDITY)) {
139 if (BIO_write(bp, " Validity\n", 17) <= 0)
140 goto err;
141 if (BIO_write(bp, " Not Before: ", 24) <= 0)
142 goto err;
143 if (ossl_asn1_time_print_ex(bp, X509_get0_notBefore(x), ASN1_DTFLGS_RFC822) == 0)
144 goto err;
145 if (BIO_write(bp, "\n Not After : ", 25) <= 0)
146 goto err;
147 if (ossl_asn1_time_print_ex(bp, X509_get0_notAfter(x), ASN1_DTFLGS_RFC822) == 0)
148 goto err;
149 if (BIO_write(bp, "\n", 1) <= 0)
150 goto err;
151 }
152 if (!(cflag & X509_FLAG_NO_SUBJECT)) {
153 if (BIO_printf(bp, " Subject:%c", mlch) <= 0)
154 goto err;
155 if (X509_NAME_print_ex
156 (bp, X509_get_subject_name(x), nmindent, nmflags) < printok)
157 goto err;
158 if (BIO_write(bp, "\n", 1) <= 0)
159 goto err;
160 }
161 if (!(cflag & X509_FLAG_NO_PUBKEY)) {
162 X509_PUBKEY *xpkey = X509_get_X509_PUBKEY(x);
163 ASN1_OBJECT *xpoid;
164 X509_PUBKEY_get0_param(&xpoid, NULL, NULL, NULL, xpkey);
165 if (BIO_write(bp, " Subject Public Key Info:\n", 33) <= 0)
166 goto err;
167 if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
168 goto err;
169 if (i2a_ASN1_OBJECT(bp, xpoid) <= 0)
170 goto err;
171 if (BIO_puts(bp, "\n") <= 0)
172 goto err;
173
174 pkey = X509_get0_pubkey(x);
175 if (pkey == NULL) {
176 BIO_printf(bp, "%12sUnable to load Public Key\n", "");
177 ERR_print_errors(bp);
178 } else {
179 EVP_PKEY_print_public(bp, pkey, 16, NULL);
180 }
181 }
182
183 if (!(cflag & X509_FLAG_NO_IDS)) {
184 const ASN1_BIT_STRING *iuid, *suid;
185 X509_get0_uids(x, &iuid, &suid);
186 if (iuid != NULL) {
187 if (BIO_printf(bp, "%8sIssuer Unique ID: ", "") <= 0)
188 goto err;
189 if (!X509_signature_dump(bp, iuid, 12))
190 goto err;
191 }
192 if (suid != NULL) {
193 if (BIO_printf(bp, "%8sSubject Unique ID: ", "") <= 0)
194 goto err;
195 if (!X509_signature_dump(bp, suid, 12))
196 goto err;
197 }
198 }
199
200 if (!(cflag & X509_FLAG_NO_EXTENSIONS)
201 && !X509V3_extensions_print(bp, "X509v3 extensions",
202 X509_get0_extensions(x), cflag, 8))
203 goto err;
204
205 if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
206 const X509_ALGOR *sig_alg;
207 const ASN1_BIT_STRING *sig;
208 X509_get0_signature(&sig, &sig_alg, x);
209 if (X509_signature_print(bp, sig_alg, sig) <= 0)
210 goto err;
211 }
212 if (!(cflag & X509_FLAG_NO_AUX)) {
213 if (!X509_aux_print(bp, x, 0))
214 goto err;
215 }
216 ret = 1;
217 err:
218 OPENSSL_free(m);
219 return ret;
220 }
221
X509_ocspid_print(BIO * bp,X509 * x)222 int X509_ocspid_print(BIO *bp, X509 *x)
223 {
224 unsigned char *der = NULL;
225 unsigned char *dertmp;
226 int derlen;
227 int i;
228 unsigned char SHA1md[SHA_DIGEST_LENGTH];
229 ASN1_BIT_STRING *keybstr;
230 const X509_NAME *subj;
231 EVP_MD *md = NULL;
232
233 if (x == NULL || bp == NULL)
234 return 0;
235 /*
236 * display the hash of the subject as it would appear in OCSP requests
237 */
238 if (BIO_printf(bp, " Subject OCSP hash: ") <= 0)
239 goto err;
240 subj = X509_get_subject_name(x);
241 derlen = i2d_X509_NAME(subj, NULL);
242 if (derlen <= 0)
243 goto err;
244 if ((der = dertmp = OPENSSL_malloc(derlen)) == NULL)
245 goto err;
246 i2d_X509_NAME(subj, &dertmp);
247
248 md = EVP_MD_fetch(x->libctx, SN_sha1, x->propq);
249 if (md == NULL)
250 goto err;
251 if (!EVP_Digest(der, derlen, SHA1md, NULL, md, NULL))
252 goto err;
253 for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
254 if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
255 goto err;
256 }
257 OPENSSL_free(der);
258 der = NULL;
259
260 /*
261 * display the hash of the public key as it would appear in OCSP requests
262 */
263 if (BIO_printf(bp, "\n Public key OCSP hash: ") <= 0)
264 goto err;
265
266 keybstr = X509_get0_pubkey_bitstr(x);
267
268 if (keybstr == NULL)
269 goto err;
270
271 if (!EVP_Digest(ASN1_STRING_get0_data(keybstr),
272 ASN1_STRING_length(keybstr), SHA1md, NULL, md, NULL))
273 goto err;
274 for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
275 if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
276 goto err;
277 }
278 BIO_printf(bp, "\n");
279 EVP_MD_free(md);
280
281 return 1;
282 err:
283 OPENSSL_free(der);
284 EVP_MD_free(md);
285 return 0;
286 }
287
X509_signature_dump(BIO * bp,const ASN1_STRING * sig,int indent)288 int X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
289 {
290 const unsigned char *s;
291 int i, n;
292
293 n = sig->length;
294 s = sig->data;
295 for (i = 0; i < n; i++) {
296 if ((i % 18) == 0) {
297 if (i > 0 && BIO_write(bp, "\n", 1) <= 0)
298 return 0;
299 if (BIO_indent(bp, indent, indent) <= 0)
300 return 0;
301 }
302 if (BIO_printf(bp, "%02x%s", s[i], ((i + 1) == n) ? "" : ":") <= 0)
303 return 0;
304 }
305 if (BIO_write(bp, "\n", 1) != 1)
306 return 0;
307
308 return 1;
309 }
310
X509_signature_print(BIO * bp,const X509_ALGOR * sigalg,const ASN1_STRING * sig)311 int X509_signature_print(BIO *bp, const X509_ALGOR *sigalg,
312 const ASN1_STRING *sig)
313 {
314 int sig_nid;
315 int indent = 4;
316 if (BIO_printf(bp, "%*sSignature Algorithm: ", indent, "") <= 0)
317 return 0;
318 if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
319 return 0;
320
321 if (sig && BIO_printf(bp, "\n%*sSignature Value:", indent, "") <= 0)
322 return 0;
323 sig_nid = OBJ_obj2nid(sigalg->algorithm);
324 if (sig_nid != NID_undef) {
325 int pkey_nid, dig_nid;
326 const EVP_PKEY_ASN1_METHOD *ameth;
327 if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
328 ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
329 if (ameth && ameth->sig_print)
330 return ameth->sig_print(bp, sigalg, sig, indent + 4, 0);
331 }
332 }
333 if (BIO_write(bp, "\n", 1) != 1)
334 return 0;
335 if (sig)
336 return X509_signature_dump(bp, sig, indent + 4);
337 return 1;
338 }
339
X509_aux_print(BIO * out,X509 * x,int indent)340 int X509_aux_print(BIO *out, X509 *x, int indent)
341 {
342 char oidstr[80], first;
343 STACK_OF(ASN1_OBJECT) *trust, *reject;
344 const unsigned char *alias, *keyid;
345 int keyidlen;
346 int i;
347 if (X509_trusted(x) == 0)
348 return 1;
349 trust = X509_get0_trust_objects(x);
350 reject = X509_get0_reject_objects(x);
351 if (trust) {
352 first = 1;
353 BIO_printf(out, "%*sTrusted Uses:\n%*s", indent, "", indent + 2, "");
354 for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
355 if (!first)
356 BIO_puts(out, ", ");
357 else
358 first = 0;
359 OBJ_obj2txt(oidstr, sizeof(oidstr),
360 sk_ASN1_OBJECT_value(trust, i), 0);
361 BIO_puts(out, oidstr);
362 }
363 BIO_puts(out, "\n");
364 } else
365 BIO_printf(out, "%*sNo Trusted Uses.\n", indent, "");
366 if (reject) {
367 first = 1;
368 BIO_printf(out, "%*sRejected Uses:\n%*s", indent, "", indent + 2, "");
369 for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
370 if (!first)
371 BIO_puts(out, ", ");
372 else
373 first = 0;
374 OBJ_obj2txt(oidstr, sizeof(oidstr),
375 sk_ASN1_OBJECT_value(reject, i), 0);
376 BIO_puts(out, oidstr);
377 }
378 BIO_puts(out, "\n");
379 } else
380 BIO_printf(out, "%*sNo Rejected Uses.\n", indent, "");
381 alias = X509_alias_get0(x, &i);
382 if (alias)
383 BIO_printf(out, "%*sAlias: %.*s\n", indent, "", i, alias);
384 keyid = X509_keyid_get0(x, &keyidlen);
385 if (keyid) {
386 BIO_printf(out, "%*sKey Id: ", indent, "");
387 for (i = 0; i < keyidlen; i++)
388 BIO_printf(out, "%s%02X", i ? ":" : "", keyid[i]);
389 BIO_write(out, "\n", 1);
390 }
391 return 1;
392 }
393
394 /*
395 * Helper functions for improving certificate verification error diagnostics
396 */
397
ossl_x509_print_ex_brief(BIO * bio,X509 * cert,unsigned long neg_cflags)398 int ossl_x509_print_ex_brief(BIO *bio, X509 *cert, unsigned long neg_cflags)
399 {
400 unsigned long flags = ASN1_STRFLGS_RFC2253 | ASN1_STRFLGS_ESC_QUOTE |
401 XN_FLAG_SEP_CPLUS_SPC | XN_FLAG_FN_SN;
402
403 if (cert == NULL)
404 return BIO_printf(bio, " (no certificate)\n") > 0;
405 if (BIO_printf(bio, " certificate\n") <= 0
406 || !X509_print_ex(bio, cert, flags, ~X509_FLAG_NO_SUBJECT))
407 return 0;
408 if (X509_check_issued((X509 *)cert, cert) == X509_V_OK) {
409 if (BIO_printf(bio, " self-issued\n") <= 0)
410 return 0;
411 } else {
412 if (BIO_printf(bio, " ") <= 0
413 || !X509_print_ex(bio, cert, flags, ~X509_FLAG_NO_ISSUER))
414 return 0;
415 }
416 if (!X509_print_ex(bio, cert, flags,
417 ~(X509_FLAG_NO_SERIAL | X509_FLAG_NO_VALIDITY)))
418 return 0;
419 if (X509_cmp_current_time(X509_get0_notBefore(cert)) > 0)
420 if (BIO_printf(bio, " not yet valid\n") <= 0)
421 return 0;
422 if (X509_cmp_current_time(X509_get0_notAfter(cert)) < 0)
423 if (BIO_printf(bio, " no more valid\n") <= 0)
424 return 0;
425 return X509_print_ex(bio, cert, flags,
426 ~neg_cflags & ~X509_FLAG_EXTENSIONS_ONLY_KID);
427 }
428
print_certs(BIO * bio,const STACK_OF (X509)* certs)429 static int print_certs(BIO *bio, const STACK_OF(X509) *certs)
430 {
431 int i;
432
433 if (certs == NULL || sk_X509_num(certs) <= 0)
434 return BIO_printf(bio, " (no certificates)\n") >= 0;
435
436 for (i = 0; i < sk_X509_num(certs); i++) {
437 X509 *cert = sk_X509_value(certs, i);
438
439 if (cert != NULL) {
440 if (!ossl_x509_print_ex_brief(bio, cert, 0))
441 return 0;
442 if (!X509V3_extensions_print(bio, NULL,
443 X509_get0_extensions(cert),
444 X509_FLAG_EXTENSIONS_ONLY_KID, 8))
445 return 0;
446 }
447 }
448 return 1;
449 }
450
print_store_certs(BIO * bio,X509_STORE * store)451 static int print_store_certs(BIO *bio, X509_STORE *store)
452 {
453 if (store != NULL) {
454 STACK_OF(X509) *certs = X509_STORE_get1_all_certs(store);
455 int ret = print_certs(bio, certs);
456
457 sk_X509_pop_free(certs, X509_free);
458 return ret;
459 } else {
460 return BIO_printf(bio, " (no trusted store)\n") >= 0;
461 }
462 }
463
464 /* Extend the error queue with details on a failed cert verification */
X509_STORE_CTX_print_verify_cb(int ok,X509_STORE_CTX * ctx)465 int X509_STORE_CTX_print_verify_cb(int ok, X509_STORE_CTX *ctx)
466 {
467 if (ok == 0 && ctx != NULL) {
468 int cert_error = X509_STORE_CTX_get_error(ctx);
469 BIO *bio = BIO_new(BIO_s_mem()); /* may be NULL */
470
471 BIO_printf(bio, "%s at depth = %d error = %d (%s)\n",
472 X509_STORE_CTX_get0_parent_ctx(ctx) != NULL
473 ? "CRL path validation"
474 : "Certificate verification",
475 X509_STORE_CTX_get_error_depth(ctx),
476 cert_error, X509_verify_cert_error_string(cert_error));
477 {
478 X509_STORE *ts = X509_STORE_CTX_get0_store(ctx);
479 X509_VERIFY_PARAM *vpm = X509_STORE_get0_param(ts);
480 char *str;
481 int idx = 0;
482
483 switch (cert_error) {
484 case X509_V_ERR_HOSTNAME_MISMATCH:
485 BIO_printf(bio, "Expected hostname(s) = ");
486 while ((str = X509_VERIFY_PARAM_get0_host(vpm, idx++)) != NULL)
487 BIO_printf(bio, "%s%s", idx == 1 ? "" : ", ", str);
488 BIO_printf(bio, "\n");
489 break;
490 case X509_V_ERR_EMAIL_MISMATCH:
491 str = X509_VERIFY_PARAM_get0_email(vpm);
492 if (str != NULL)
493 BIO_printf(bio, "Expected email address = %s\n", str);
494 break;
495 case X509_V_ERR_IP_ADDRESS_MISMATCH:
496 str = X509_VERIFY_PARAM_get1_ip_asc(vpm);
497 if (str != NULL)
498 BIO_printf(bio, "Expected IP address = %s\n", str);
499 OPENSSL_free(str);
500 break;
501 default:
502 break;
503 }
504 }
505
506 BIO_printf(bio, "Failure for:\n");
507 ossl_x509_print_ex_brief(bio, X509_STORE_CTX_get_current_cert(ctx),
508 X509_FLAG_NO_EXTENSIONS);
509 if (cert_error == X509_V_ERR_CERT_UNTRUSTED
510 || cert_error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT
511 || cert_error == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN
512 || cert_error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT
513 || cert_error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY
514 || cert_error == X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER
515 || cert_error == X509_V_ERR_STORE_LOOKUP) {
516 BIO_printf(bio, "Non-trusted certs:\n");
517 print_certs(bio, X509_STORE_CTX_get0_untrusted(ctx));
518 BIO_printf(bio, "Certs in trust store:\n");
519 print_store_certs(bio, X509_STORE_CTX_get0_store(ctx));
520 }
521 ERR_raise(ERR_LIB_X509, X509_R_CERTIFICATE_VERIFICATION_FAILED);
522 ERR_add_error_mem_bio("\n", bio);
523 BIO_free(bio);
524 }
525
526 return ok;
527 }
528