1 /*
2 * Copyright 1995-2022 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 <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
OSSL_STACK_OF_X509_free(STACK_OF (X509)* certs)20 void OSSL_STACK_OF_X509_free(STACK_OF(X509) *certs)
21 {
22 sk_X509_pop_free(certs, X509_free);
23 }
24
25 #ifndef OPENSSL_NO_STDIO
X509_print_fp(FILE * fp,X509 * x)26 int X509_print_fp(FILE *fp, X509 *x)
27 {
28 return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
29 }
30
X509_print_ex_fp(FILE * fp,X509 * x,unsigned long nmflag,unsigned long cflag)31 int X509_print_ex_fp(FILE *fp, X509 *x, unsigned long nmflag,
32 unsigned long cflag)
33 {
34 BIO *b;
35 int ret;
36
37 if ((b = BIO_new(BIO_s_file())) == NULL) {
38 ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
39 return 0;
40 }
41 BIO_set_fp(b, fp, BIO_NOCLOSE);
42 ret = X509_print_ex(b, x, nmflag, cflag);
43 BIO_free(b);
44 return ret;
45 }
46 #endif
47
X509_print(BIO * bp,X509 * x)48 int X509_print(BIO *bp, X509 *x)
49 {
50 return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
51 }
52
X509_print_ex(BIO * bp,X509 * x,unsigned long nmflags,unsigned long cflag)53 int X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags,
54 unsigned long cflag)
55 {
56 long l;
57 int ret = 0;
58 char mlch = ' ';
59 int nmindent = 0, printok = 0;
60 EVP_PKEY *pkey = NULL;
61
62 if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
63 mlch = '\n';
64 nmindent = 12;
65 }
66
67 if (nmflags == XN_FLAG_COMPAT)
68 printok = 1;
69
70 if (!(cflag & X509_FLAG_NO_HEADER)) {
71 if (BIO_write(bp, "Certificate:\n", 13) <= 0)
72 goto err;
73 if (BIO_write(bp, " Data:\n", 10) <= 0)
74 goto err;
75 }
76 if (!(cflag & X509_FLAG_NO_VERSION)) {
77 l = X509_get_version(x);
78 if (l >= X509_VERSION_1 && l <= X509_VERSION_3) {
79 if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n", "", l + 1, (unsigned long)l) <= 0)
80 goto err;
81 } else {
82 if (BIO_printf(bp, "%8sVersion: Unknown (%ld)\n", "", l) <= 0)
83 goto err;
84 }
85 }
86 if (!(cflag & X509_FLAG_NO_SERIAL)) {
87 const ASN1_INTEGER *bs = X509_get0_serialNumber(x);
88
89 if (BIO_write(bp, " Serial Number:", 22) <= 0)
90 goto err;
91 if (ossl_serial_number_print(bp, bs, 12) != 0)
92 goto err;
93 if (BIO_puts(bp, "\n") <= 0)
94 goto err;
95 }
96
97 if (!(cflag & X509_FLAG_NO_SIGNAME)) {
98 const X509_ALGOR *tsig_alg = X509_get0_tbs_sigalg(x);
99
100 if (BIO_puts(bp, " ") <= 0)
101 goto err;
102 if (X509_signature_print(bp, tsig_alg, NULL) <= 0)
103 goto err;
104 }
105
106 if (!(cflag & X509_FLAG_NO_ISSUER)) {
107 if (BIO_printf(bp, " Issuer:%c", mlch) <= 0)
108 goto err;
109 if (X509_NAME_print_ex(bp, X509_get_issuer_name(x), nmindent, nmflags)
110 < printok)
111 goto err;
112 if (BIO_write(bp, "\n", 1) <= 0)
113 goto err;
114 }
115 if (!(cflag & X509_FLAG_NO_VALIDITY)) {
116 if (BIO_write(bp, " Validity\n", 17) <= 0)
117 goto err;
118 if (BIO_write(bp, " Not Before: ", 24) <= 0)
119 goto err;
120 if (ossl_asn1_time_print_ex(bp, X509_get0_notBefore(x), ASN1_DTFLGS_RFC822) == 0)
121 goto err;
122 if (BIO_write(bp, "\n Not After : ", 25) <= 0)
123 goto err;
124 if (ossl_asn1_time_print_ex(bp, X509_get0_notAfter(x), ASN1_DTFLGS_RFC822) == 0)
125 goto err;
126 if (BIO_write(bp, "\n", 1) <= 0)
127 goto err;
128 }
129 if (!(cflag & X509_FLAG_NO_SUBJECT)) {
130 if (BIO_printf(bp, " Subject:%c", mlch) <= 0)
131 goto err;
132 if (X509_NAME_print_ex
133 (bp, X509_get_subject_name(x), nmindent, nmflags) < printok)
134 goto err;
135 if (BIO_write(bp, "\n", 1) <= 0)
136 goto err;
137 }
138 if (!(cflag & X509_FLAG_NO_PUBKEY)) {
139 X509_PUBKEY *xpkey = X509_get_X509_PUBKEY(x);
140 ASN1_OBJECT *xpoid;
141 X509_PUBKEY_get0_param(&xpoid, NULL, NULL, NULL, xpkey);
142 if (BIO_write(bp, " Subject Public Key Info:\n", 33) <= 0)
143 goto err;
144 if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
145 goto err;
146 if (i2a_ASN1_OBJECT(bp, xpoid) <= 0)
147 goto err;
148 if (BIO_puts(bp, "\n") <= 0)
149 goto err;
150
151 pkey = X509_get0_pubkey(x);
152 if (pkey == NULL) {
153 BIO_printf(bp, "%12sUnable to load Public Key\n", "");
154 ERR_print_errors(bp);
155 } else {
156 EVP_PKEY_print_public(bp, pkey, 16, NULL);
157 }
158 }
159
160 if (!(cflag & X509_FLAG_NO_IDS)) {
161 const ASN1_BIT_STRING *iuid, *suid;
162 X509_get0_uids(x, &iuid, &suid);
163 if (iuid != NULL) {
164 if (BIO_printf(bp, "%8sIssuer Unique ID: ", "") <= 0)
165 goto err;
166 if (!X509_signature_dump(bp, iuid, 12))
167 goto err;
168 }
169 if (suid != NULL) {
170 if (BIO_printf(bp, "%8sSubject Unique ID: ", "") <= 0)
171 goto err;
172 if (!X509_signature_dump(bp, suid, 12))
173 goto err;
174 }
175 }
176
177 if (!(cflag & X509_FLAG_NO_EXTENSIONS)
178 && !X509V3_extensions_print(bp, "X509v3 extensions",
179 X509_get0_extensions(x), cflag, 8))
180 goto err;
181
182 if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
183 const X509_ALGOR *sig_alg;
184 const ASN1_BIT_STRING *sig;
185 X509_get0_signature(&sig, &sig_alg, x);
186 if (X509_signature_print(bp, sig_alg, sig) <= 0)
187 goto err;
188 }
189 if (!(cflag & X509_FLAG_NO_AUX)) {
190 if (!X509_aux_print(bp, x, 0))
191 goto err;
192 }
193 ret = 1;
194 err:
195 return ret;
196 }
197
X509_ocspid_print(BIO * bp,X509 * x)198 int X509_ocspid_print(BIO *bp, X509 *x)
199 {
200 unsigned char *der = NULL;
201 unsigned char *dertmp;
202 int derlen;
203 int i;
204 unsigned char SHA1md[SHA_DIGEST_LENGTH];
205 ASN1_BIT_STRING *keybstr;
206 const X509_NAME *subj;
207 EVP_MD *md = NULL;
208
209 if (x == NULL || bp == NULL)
210 return 0;
211 /*
212 * display the hash of the subject as it would appear in OCSP requests
213 */
214 if (BIO_printf(bp, " Subject OCSP hash: ") <= 0)
215 goto err;
216 subj = X509_get_subject_name(x);
217 derlen = i2d_X509_NAME(subj, NULL);
218 if (derlen <= 0)
219 goto err;
220 if ((der = dertmp = OPENSSL_malloc(derlen)) == NULL)
221 goto err;
222 i2d_X509_NAME(subj, &dertmp);
223
224 md = EVP_MD_fetch(x->libctx, SN_sha1, x->propq);
225 if (md == NULL)
226 goto err;
227 if (!EVP_Digest(der, derlen, SHA1md, NULL, md, NULL))
228 goto err;
229 for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
230 if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
231 goto err;
232 }
233 OPENSSL_free(der);
234 der = NULL;
235
236 /*
237 * display the hash of the public key as it would appear in OCSP requests
238 */
239 if (BIO_printf(bp, "\n Public key OCSP hash: ") <= 0)
240 goto err;
241
242 keybstr = X509_get0_pubkey_bitstr(x);
243
244 if (keybstr == NULL)
245 goto err;
246
247 if (!EVP_Digest(ASN1_STRING_get0_data(keybstr),
248 ASN1_STRING_length(keybstr), SHA1md, NULL, md, NULL))
249 goto err;
250 for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
251 if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
252 goto err;
253 }
254 BIO_printf(bp, "\n");
255 EVP_MD_free(md);
256
257 return 1;
258 err:
259 OPENSSL_free(der);
260 EVP_MD_free(md);
261 return 0;
262 }
263
X509_signature_dump(BIO * bp,const ASN1_STRING * sig,int indent)264 int X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
265 {
266 const unsigned char *s;
267 int i, n;
268
269 n = sig->length;
270 s = sig->data;
271 for (i = 0; i < n; i++) {
272 if ((i % 18) == 0) {
273 if (i > 0 && BIO_write(bp, "\n", 1) <= 0)
274 return 0;
275 if (BIO_indent(bp, indent, indent) <= 0)
276 return 0;
277 }
278 if (BIO_printf(bp, "%02x%s", s[i], ((i + 1) == n) ? "" : ":") <= 0)
279 return 0;
280 }
281 if (BIO_write(bp, "\n", 1) != 1)
282 return 0;
283
284 return 1;
285 }
286
X509_signature_print(BIO * bp,const X509_ALGOR * sigalg,const ASN1_STRING * sig)287 int X509_signature_print(BIO *bp, const X509_ALGOR *sigalg,
288 const ASN1_STRING *sig)
289 {
290 int sig_nid;
291 int indent = 4;
292 if (BIO_printf(bp, "%*sSignature Algorithm: ", indent, "") <= 0)
293 return 0;
294 if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
295 return 0;
296
297 if (sig && BIO_printf(bp, "\n%*sSignature Value:", indent, "") <= 0)
298 return 0;
299 sig_nid = OBJ_obj2nid(sigalg->algorithm);
300 if (sig_nid != NID_undef) {
301 int pkey_nid, dig_nid;
302 const EVP_PKEY_ASN1_METHOD *ameth;
303 if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
304 ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
305 if (ameth && ameth->sig_print)
306 return ameth->sig_print(bp, sigalg, sig, indent + 4, 0);
307 }
308 }
309 if (BIO_write(bp, "\n", 1) != 1)
310 return 0;
311 if (sig)
312 return X509_signature_dump(bp, sig, indent + 4);
313 return 1;
314 }
315
X509_aux_print(BIO * out,X509 * x,int indent)316 int X509_aux_print(BIO *out, X509 *x, int indent)
317 {
318 char oidstr[80], first;
319 STACK_OF(ASN1_OBJECT) *trust, *reject;
320 const unsigned char *alias, *keyid;
321 int keyidlen;
322 int i;
323 if (X509_trusted(x) == 0)
324 return 1;
325 trust = X509_get0_trust_objects(x);
326 reject = X509_get0_reject_objects(x);
327 if (trust) {
328 first = 1;
329 BIO_printf(out, "%*sTrusted Uses:\n%*s", indent, "", indent + 2, "");
330 for (i = 0; i < sk_ASN1_OBJECT_num(trust); i++) {
331 if (!first)
332 BIO_puts(out, ", ");
333 else
334 first = 0;
335 OBJ_obj2txt(oidstr, sizeof(oidstr),
336 sk_ASN1_OBJECT_value(trust, i), 0);
337 BIO_puts(out, oidstr);
338 }
339 BIO_puts(out, "\n");
340 } else
341 BIO_printf(out, "%*sNo Trusted Uses.\n", indent, "");
342 if (reject) {
343 first = 1;
344 BIO_printf(out, "%*sRejected Uses:\n%*s", indent, "", indent + 2, "");
345 for (i = 0; i < sk_ASN1_OBJECT_num(reject); i++) {
346 if (!first)
347 BIO_puts(out, ", ");
348 else
349 first = 0;
350 OBJ_obj2txt(oidstr, sizeof(oidstr),
351 sk_ASN1_OBJECT_value(reject, i), 0);
352 BIO_puts(out, oidstr);
353 }
354 BIO_puts(out, "\n");
355 } else
356 BIO_printf(out, "%*sNo Rejected Uses.\n", indent, "");
357 alias = X509_alias_get0(x, &i);
358 if (alias)
359 BIO_printf(out, "%*sAlias: %.*s\n", indent, "", i, alias);
360 keyid = X509_keyid_get0(x, &keyidlen);
361 if (keyid) {
362 BIO_printf(out, "%*sKey Id: ", indent, "");
363 for (i = 0; i < keyidlen; i++)
364 BIO_printf(out, "%s%02X", i ? ":" : "", keyid[i]);
365 BIO_write(out, "\n", 1);
366 }
367 return 1;
368 }
369
370 /*
371 * Helper functions for improving certificate verification error diagnostics
372 */
373
ossl_x509_print_ex_brief(BIO * bio,X509 * cert,unsigned long neg_cflags)374 int ossl_x509_print_ex_brief(BIO *bio, X509 *cert, unsigned long neg_cflags)
375 {
376 unsigned long flags = ASN1_STRFLGS_RFC2253 | ASN1_STRFLGS_ESC_QUOTE |
377 XN_FLAG_SEP_CPLUS_SPC | XN_FLAG_FN_SN;
378
379 if (cert == NULL)
380 return BIO_printf(bio, " (no certificate)\n") > 0;
381 if (BIO_printf(bio, " certificate\n") <= 0
382 || !X509_print_ex(bio, cert, flags, ~X509_FLAG_NO_SUBJECT))
383 return 0;
384 if (X509_check_issued((X509 *)cert, cert) == X509_V_OK) {
385 if (BIO_printf(bio, " self-issued\n") <= 0)
386 return 0;
387 } else {
388 if (BIO_printf(bio, " ") <= 0
389 || !X509_print_ex(bio, cert, flags, ~X509_FLAG_NO_ISSUER))
390 return 0;
391 }
392 if (!X509_print_ex(bio, cert, flags,
393 ~(X509_FLAG_NO_SERIAL | X509_FLAG_NO_VALIDITY)))
394 return 0;
395 if (X509_cmp_current_time(X509_get0_notBefore(cert)) > 0)
396 if (BIO_printf(bio, " not yet valid\n") <= 0)
397 return 0;
398 if (X509_cmp_current_time(X509_get0_notAfter(cert)) < 0)
399 if (BIO_printf(bio, " no more valid\n") <= 0)
400 return 0;
401 return X509_print_ex(bio, cert, flags,
402 ~neg_cflags & ~X509_FLAG_EXTENSIONS_ONLY_KID);
403 }
404
print_certs(BIO * bio,const STACK_OF (X509)* certs)405 static int print_certs(BIO *bio, const STACK_OF(X509) *certs)
406 {
407 int i;
408
409 if (certs == NULL || sk_X509_num(certs) <= 0)
410 return BIO_printf(bio, " (no certificates)\n") >= 0;
411
412 for (i = 0; i < sk_X509_num(certs); i++) {
413 X509 *cert = sk_X509_value(certs, i);
414
415 if (cert != NULL) {
416 if (!ossl_x509_print_ex_brief(bio, cert, 0))
417 return 0;
418 if (!X509V3_extensions_print(bio, NULL,
419 X509_get0_extensions(cert),
420 X509_FLAG_EXTENSIONS_ONLY_KID, 8))
421 return 0;
422 }
423 }
424 return 1;
425 }
426
print_store_certs(BIO * bio,X509_STORE * store)427 static int print_store_certs(BIO *bio, X509_STORE *store)
428 {
429 if (store != NULL) {
430 STACK_OF(X509) *certs = X509_STORE_get1_all_certs(store);
431 int ret = print_certs(bio, certs);
432
433 OSSL_STACK_OF_X509_free(certs);
434 return ret;
435 } else {
436 return BIO_printf(bio, " (no trusted store)\n") >= 0;
437 }
438 }
439
440 /* Extend the error queue with details on a failed cert verification */
X509_STORE_CTX_print_verify_cb(int ok,X509_STORE_CTX * ctx)441 int X509_STORE_CTX_print_verify_cb(int ok, X509_STORE_CTX *ctx)
442 {
443 if (ok == 0 && ctx != NULL) {
444 int cert_error = X509_STORE_CTX_get_error(ctx);
445 BIO *bio = BIO_new(BIO_s_mem()); /* may be NULL */
446
447 if (bio == NULL)
448 return 0;
449 BIO_printf(bio, "%s at depth = %d error = %d (%s)\n",
450 X509_STORE_CTX_get0_parent_ctx(ctx) != NULL
451 ? "CRL path validation"
452 : "Certificate verification",
453 X509_STORE_CTX_get_error_depth(ctx),
454 cert_error, X509_verify_cert_error_string(cert_error));
455 {
456 X509_STORE *ts = X509_STORE_CTX_get0_store(ctx);
457 X509_VERIFY_PARAM *vpm = X509_STORE_get0_param(ts);
458 char *str;
459 int idx = 0;
460
461 switch (cert_error) {
462 case X509_V_ERR_HOSTNAME_MISMATCH:
463 BIO_printf(bio, "Expected hostname(s) = ");
464 while ((str = X509_VERIFY_PARAM_get0_host(vpm, idx++)) != NULL)
465 BIO_printf(bio, "%s%s", idx == 1 ? "" : ", ", str);
466 BIO_printf(bio, "\n");
467 break;
468 case X509_V_ERR_EMAIL_MISMATCH:
469 str = X509_VERIFY_PARAM_get0_email(vpm);
470 if (str != NULL)
471 BIO_printf(bio, "Expected email address = %s\n", str);
472 break;
473 case X509_V_ERR_IP_ADDRESS_MISMATCH:
474 str = X509_VERIFY_PARAM_get1_ip_asc(vpm);
475 if (str != NULL)
476 BIO_printf(bio, "Expected IP address = %s\n", str);
477 OPENSSL_free(str);
478 break;
479 default:
480 break;
481 }
482 }
483
484 BIO_printf(bio, "Failure for:\n");
485 ossl_x509_print_ex_brief(bio, X509_STORE_CTX_get_current_cert(ctx),
486 X509_FLAG_NO_EXTENSIONS);
487 if (cert_error == X509_V_ERR_CERT_UNTRUSTED
488 || cert_error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT
489 || cert_error == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN
490 || cert_error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT
491 || cert_error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY
492 || cert_error == X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER
493 || cert_error == X509_V_ERR_STORE_LOOKUP) {
494 BIO_printf(bio, "Non-trusted certs:\n");
495 print_certs(bio, X509_STORE_CTX_get0_untrusted(ctx));
496 BIO_printf(bio, "Certs in trust store:\n");
497 print_store_certs(bio, X509_STORE_CTX_get0_store(ctx));
498 }
499 ERR_raise(ERR_LIB_X509, X509_R_CERTIFICATE_VERIFICATION_FAILED);
500 ERR_add_error_mem_bio("\n", bio);
501 BIO_free(bio);
502 }
503
504 return ok;
505 }
506
507 /*
508 * Prints serial numbers in decimal and hexadecimal. The indent argument is only
509 * used if the serial number is too large to fit in a long int.
510 */
ossl_serial_number_print(BIO * out,const ASN1_INTEGER * bs,int indent)511 int ossl_serial_number_print(BIO *out, const ASN1_INTEGER *bs, int indent)
512 {
513 int i;
514 long l;
515 unsigned long ul;
516 const char *neg;
517
518 if (bs->length <= (int)sizeof(long)) {
519 ERR_set_mark();
520 l = ASN1_INTEGER_get(bs);
521 ERR_pop_to_mark();
522 } else {
523 l = -1;
524 }
525 if (l != -1) { /* Reading a long int succeeded: print decimal and hex. */
526 if (bs->type == V_ASN1_NEG_INTEGER) {
527 ul = 0 - (unsigned long)l;
528 neg = "-";
529 } else {
530 ul = l;
531 neg = "";
532 }
533 if (BIO_printf(out, " %s%lu (%s0x%lx)", neg, ul, neg, ul) <= 0)
534 return -1;
535 } else { /* Reading a long int failed: just print hex. */
536 neg = (bs->type == V_ASN1_NEG_INTEGER) ? " (Negative)" : "";
537 if (BIO_printf(out, "\n%*s%s", indent, "", neg) <= 0)
538 return -1;
539
540 for (i = 0; i < bs->length - 1; i++) {
541 if (BIO_printf(out, "%02x%c", bs->data[i], ':') <= 0)
542 return -1;
543 }
544 if (BIO_printf(out, "%02x", bs->data[i]) <= 0)
545 return -1;
546 }
547 return 0;
548 }
549
