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