1 /* crypto/x509/x509_vfy.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
64 #include <openssl/crypto.h>
65 #include <openssl/lhash.h>
66 #include <openssl/buffer.h>
67 #include <openssl/evp.h>
68 #include <openssl/asn1.h>
69 #include <openssl/x509.h>
70 #include <openssl/x509v3.h>
71 #include <openssl/objects.h>
73 /* CRL score values */
75 /* No unhandled critical extensions */
77 #define CRL_SCORE_NOCRITICAL 0x100
79 /* certificate is within CRL scope */
81 #define CRL_SCORE_SCOPE 0x080
85 #define CRL_SCORE_TIME 0x040
87 /* Issuer name matches certificate */
89 #define CRL_SCORE_ISSUER_NAME 0x020
91 /* If this score or above CRL is probably valid */
93 #define CRL_SCORE_VALID (CRL_SCORE_NOCRITICAL|CRL_SCORE_TIME|CRL_SCORE_SCOPE)
95 /* CRL issuer is certificate issuer */
97 #define CRL_SCORE_ISSUER_CERT 0x018
99 /* CRL issuer is on certificate path */
101 #define CRL_SCORE_SAME_PATH 0x008
103 /* CRL issuer matches CRL AKID */
105 #define CRL_SCORE_AKID 0x004
107 /* Have a delta CRL with valid times */
109 #define CRL_SCORE_TIME_DELTA 0x002
111 static int null_callback(int ok,X509_STORE_CTX *e);
112 static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
113 static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x);
114 static int check_chain_extensions(X509_STORE_CTX *ctx);
115 static int check_name_constraints(X509_STORE_CTX *ctx);
116 static int check_id(X509_STORE_CTX *ctx);
117 static int check_trust(X509_STORE_CTX *ctx);
118 static int check_revocation(X509_STORE_CTX *ctx);
119 static int check_cert(X509_STORE_CTX *ctx);
120 static int check_policy(X509_STORE_CTX *ctx);
122 static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
123 unsigned int *preasons,
124 X509_CRL *crl, X509 *x);
125 static int get_crl_delta(X509_STORE_CTX *ctx,
126 X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x);
127 static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pcrl_score,
128 X509_CRL *base, STACK_OF(X509_CRL) *crls);
129 static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
130 X509 **pissuer, int *pcrl_score);
131 static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
132 unsigned int *preasons);
133 static int check_crl_path(X509_STORE_CTX *ctx, X509 *x);
134 static int check_crl_chain(X509_STORE_CTX *ctx,
135 STACK_OF(X509) *cert_path,
136 STACK_OF(X509) *crl_path);
138 static int internal_verify(X509_STORE_CTX *ctx);
139 const char X509_version[]="X.509" OPENSSL_VERSION_PTEXT;
142 static int null_callback(int ok, X509_STORE_CTX *e)
148 static int x509_subject_cmp(X509 **a, X509 **b)
150 return X509_subject_name_cmp(*a,*b);
153 /* Return 1 is a certificate is self signed */
154 static int cert_self_signed(X509 *x)
156 X509_check_purpose(x, -1, 0);
157 if (x->ex_flags & EXFLAG_SS)
163 /* Given a certificate try and find an exact match in the store */
165 static X509 *lookup_cert_match(X509_STORE_CTX *ctx, X509 *x)
167 STACK_OF(X509) *certs;
170 /* Lookup all certs with matching subject name */
171 certs = ctx->lookup_certs(ctx, X509_get_subject_name(x));
174 /* Look for exact match */
175 for (i = 0; i < sk_X509_num(certs); i++)
177 xtmp = sk_X509_value(certs, i);
178 if (!X509_cmp(xtmp, x))
181 if (i < sk_X509_num(certs))
182 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
185 sk_X509_pop_free(certs, X509_free);
189 int X509_verify_cert(X509_STORE_CTX *ctx)
191 X509 *x,*xtmp,*chain_ss=NULL;
193 X509_VERIFY_PARAM *param = ctx->param;
196 int (*cb)(int xok,X509_STORE_CTX *xctx);
197 STACK_OF(X509) *sktmp=NULL;
198 if (ctx->cert == NULL)
200 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
206 /* first we make sure the chain we are going to build is
207 * present and that the first entry is in place */
208 if (ctx->chain == NULL)
210 if ( ((ctx->chain=sk_X509_new_null()) == NULL) ||
211 (!sk_X509_push(ctx->chain,ctx->cert)))
213 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
216 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
217 ctx->last_untrusted=1;
220 /* We use a temporary STACK so we can chop and hack at it */
221 if (ctx->untrusted != NULL
222 && (sktmp=sk_X509_dup(ctx->untrusted)) == NULL)
224 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
228 num=sk_X509_num(ctx->chain);
229 x=sk_X509_value(ctx->chain,num-1);
235 /* If we have enough, we break */
236 if (depth < num) break; /* FIXME: If this happens, we should take
237 * note of it and, if appropriate, use the
238 * X509_V_ERR_CERT_CHAIN_TOO_LONG error
242 /* If we are self signed, we break */
243 if (cert_self_signed(x))
245 /* If asked see if we can find issuer in trusted store first */
246 if (ctx->param->flags & X509_V_FLAG_TRUSTED_FIRST)
248 ok = ctx->get_issuer(&xtmp, ctx, x);
251 /* If successful for now free up cert so it
252 * will be picked up again later.
261 /* If we were passed a cert chain, use it first */
262 if (ctx->untrusted != NULL)
264 xtmp=find_issuer(ctx, sktmp,x);
267 if (!sk_X509_push(ctx->chain,xtmp))
269 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
272 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
273 (void)sk_X509_delete_ptr(sktmp,xtmp);
274 ctx->last_untrusted++;
277 /* reparse the full chain for
285 /* at this point, chain should contain a list of untrusted
286 * certificates. We now need to add at least one trusted one,
287 * if possible, otherwise we complain. */
289 /* Examine last certificate in chain and see if it
293 i=sk_X509_num(ctx->chain);
294 x=sk_X509_value(ctx->chain,i-1);
295 if (cert_self_signed(x))
297 /* we have a self signed certificate */
298 if (sk_X509_num(ctx->chain) == 1)
300 /* We have a single self signed certificate: see if
301 * we can find it in the store. We must have an exact
302 * match to avoid possible impersonation.
304 ok = ctx->get_issuer(&xtmp, ctx, x);
305 if ((ok <= 0) || X509_cmp(x, xtmp))
307 ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
309 ctx->error_depth=i-1;
310 if (ok == 1) X509_free(xtmp);
317 /* We have a match: replace certificate with store version
318 * so we get any trust settings.
322 (void)sk_X509_set(ctx->chain, i - 1, x);
323 ctx->last_untrusted=0;
328 /* extract and save self signed certificate for later use */
329 chain_ss=sk_X509_pop(ctx->chain);
330 ctx->last_untrusted--;
332 x=sk_X509_value(ctx->chain,num-1);
336 /* We now lookup certs from the certificate store */
339 /* If we have enough, we break */
340 if (depth < num) break;
342 /* If we are self signed, we break */
343 if (cert_self_signed(x))
346 ok = ctx->get_issuer(&xtmp, ctx, x);
348 if (ok < 0) return ok;
352 if (!sk_X509_push(ctx->chain,x))
355 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
361 /* we now have our chain, lets check it... */
363 i = check_trust(ctx);
365 /* If explicitly rejected error */
366 if (i == X509_TRUST_REJECTED)
368 /* If not explicitly trusted then indicate error */
369 if (i != X509_TRUST_TRUSTED)
371 if ((chain_ss == NULL) || !ctx->check_issued(ctx, x, chain_ss))
373 if (ctx->last_untrusted >= num)
374 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
376 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
382 sk_X509_push(ctx->chain,chain_ss);
384 ctx->last_untrusted=num;
385 ctx->current_cert=chain_ss;
386 ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
390 ctx->error_depth=num-1;
396 /* We have the chain complete: now we need to check its purpose */
397 ok = check_chain_extensions(ctx);
401 /* Check name constraints */
403 ok = check_name_constraints(ctx);
411 /* We may as well copy down any DSA parameters that are required */
412 X509_get_pubkey_parameters(NULL,ctx->chain);
414 /* Check revocation status: we do this after copying parameters
415 * because they may be needed for CRL signature verification.
418 ok = ctx->check_revocation(ctx);
421 i = X509_chain_check_suiteb(&ctx->error_depth, NULL, ctx->chain,
426 ctx->current_cert = sk_X509_value(ctx->chain, ctx->error_depth);
432 /* At this point, we have a chain and need to verify it */
433 if (ctx->verify != NULL)
436 ok=internal_verify(ctx);
439 #ifndef OPENSSL_NO_RFC3779
440 /* RFC 3779 path validation, now that CRL check has been done */
441 ok = v3_asid_validate_path(ctx);
443 ok = v3_addr_validate_path(ctx);
447 /* If we get this far evaluate policies */
448 if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK))
449 ok = ctx->check_policy(ctx);
454 X509_get_pubkey_parameters(NULL,ctx->chain);
456 if (sktmp != NULL) sk_X509_free(sktmp);
457 if (chain_ss != NULL) X509_free(chain_ss);
462 /* Given a STACK_OF(X509) find the issuer of cert (if any)
465 static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x)
469 for (i = 0; i < sk_X509_num(sk); i++)
471 issuer = sk_X509_value(sk, i);
472 if (ctx->check_issued(ctx, x, issuer))
478 /* Given a possible certificate and issuer check them */
480 static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer)
483 ret = X509_check_issued(issuer, x);
484 if (ret == X509_V_OK)
488 /* Special case: single self signed certificate */
489 if (cert_self_signed(x) && sk_X509_num(ctx->chain) == 1)
491 for (i = 0; i < sk_X509_num(ctx->chain); i++)
493 ch = sk_X509_value(ctx->chain, i);
494 if (ch == issuer || !X509_cmp(ch, issuer))
496 ret = X509_V_ERR_PATH_LOOP;
502 if (ret == X509_V_OK)
504 /* If we haven't asked for issuer errors don't set ctx */
505 if (!(ctx->param->flags & X509_V_FLAG_CB_ISSUER_CHECK))
509 ctx->current_cert = x;
510 ctx->current_issuer = issuer;
511 return ctx->verify_cb(0, ctx);
515 /* Alternative lookup method: look from a STACK stored in other_ctx */
517 static int get_issuer_sk(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
519 *issuer = find_issuer(ctx, ctx->other_ctx, x);
522 CRYPTO_add(&(*issuer)->references,1,CRYPTO_LOCK_X509);
530 /* Check a certificate chains extensions for consistency
531 * with the supplied purpose
534 static int check_chain_extensions(X509_STORE_CTX *ctx)
536 #ifdef OPENSSL_NO_CHAIN_VERIFY
539 int i, ok=0, must_be_ca, plen = 0;
541 int (*cb)(int xok,X509_STORE_CTX *xctx);
542 int proxy_path_length = 0;
544 int allow_proxy_certs;
547 /* must_be_ca can have 1 of 3 values:
548 -1: we accept both CA and non-CA certificates, to allow direct
549 use of self-signed certificates (which are marked as CA).
550 0: we only accept non-CA certificates. This is currently not
551 used, but the possibility is present for future extensions.
552 1: we only accept CA certificates. This is currently used for
553 all certificates in the chain except the leaf certificate.
557 /* CRL path validation */
560 allow_proxy_certs = 0;
561 purpose = X509_PURPOSE_CRL_SIGN;
566 !!(ctx->param->flags & X509_V_FLAG_ALLOW_PROXY_CERTS);
567 /* A hack to keep people who don't want to modify their
569 if (getenv("OPENSSL_ALLOW_PROXY_CERTS"))
570 allow_proxy_certs = 1;
571 purpose = ctx->param->purpose;
574 /* Check all untrusted certificates */
575 for (i = 0; i < ctx->last_untrusted; i++)
578 x = sk_X509_value(ctx->chain, i);
579 if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
580 && (x->ex_flags & EXFLAG_CRITICAL))
582 ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION;
583 ctx->error_depth = i;
584 ctx->current_cert = x;
588 if (!allow_proxy_certs && (x->ex_flags & EXFLAG_PROXY))
590 ctx->error = X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED;
591 ctx->error_depth = i;
592 ctx->current_cert = x;
596 ret = X509_check_ca(x);
600 if ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
601 && (ret != 1) && (ret != 0))
604 ctx->error = X509_V_ERR_INVALID_CA;
613 ctx->error = X509_V_ERR_INVALID_NON_CA;
620 || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
624 ctx->error = X509_V_ERR_INVALID_CA;
632 ctx->error_depth = i;
633 ctx->current_cert = x;
637 if (ctx->param->purpose > 0)
639 ret = X509_check_purpose(x, purpose, must_be_ca > 0);
641 || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
644 ctx->error = X509_V_ERR_INVALID_PURPOSE;
645 ctx->error_depth = i;
646 ctx->current_cert = x;
651 /* Check pathlen if not self issued */
652 if ((i > 1) && !(x->ex_flags & EXFLAG_SI)
653 && (x->ex_pathlen != -1)
654 && (plen > (x->ex_pathlen + proxy_path_length + 1)))
656 ctx->error = X509_V_ERR_PATH_LENGTH_EXCEEDED;
657 ctx->error_depth = i;
658 ctx->current_cert = x;
662 /* Increment path length if not self issued */
663 if (!(x->ex_flags & EXFLAG_SI))
665 /* If this certificate is a proxy certificate, the next
666 certificate must be another proxy certificate or a EE
667 certificate. If not, the next certificate must be a
669 if (x->ex_flags & EXFLAG_PROXY)
671 if (x->ex_pcpathlen != -1 && i > x->ex_pcpathlen)
674 X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
675 ctx->error_depth = i;
676 ctx->current_cert = x;
692 static int check_name_constraints(X509_STORE_CTX *ctx)
696 /* Check name constraints for all certificates */
697 for (i = sk_X509_num(ctx->chain) - 1; i >= 0; i--)
699 x = sk_X509_value(ctx->chain, i);
700 /* Ignore self issued certs unless last in chain */
701 if (i && (x->ex_flags & EXFLAG_SI))
703 /* Check against constraints for all certificates higher in
704 * chain including trust anchor. Trust anchor not strictly
705 * speaking needed but if it includes constraints it is to be
706 * assumed it expects them to be obeyed.
708 for (j = sk_X509_num(ctx->chain) - 1; j > i; j--)
710 NAME_CONSTRAINTS *nc = sk_X509_value(ctx->chain, j)->nc;
713 rv = NAME_CONSTRAINTS_check(x, nc);
717 ctx->error_depth = i;
718 ctx->current_cert = x;
719 if (!ctx->verify_cb(0,ctx))
728 static int check_id_error(X509_STORE_CTX *ctx, int errcode)
730 ctx->error = errcode;
731 ctx->current_cert = ctx->cert;
732 ctx->error_depth = 0;
733 return ctx->verify_cb(0, ctx);
736 static int check_id(X509_STORE_CTX *ctx)
738 X509_VERIFY_PARAM *vpm = ctx->param;
740 if (vpm->host && !X509_check_host(x, vpm->host, vpm->hostlen, 0))
742 if (!check_id_error(ctx, X509_V_ERR_HOSTNAME_MISMATCH))
745 if (vpm->email && !X509_check_email(x, vpm->email, vpm->emaillen, 0))
747 if (!check_id_error(ctx, X509_V_ERR_EMAIL_MISMATCH))
750 if (vpm->ip && !X509_check_ip(x, vpm->ip, vpm->iplen, 0))
752 if (!check_id_error(ctx, X509_V_ERR_IP_ADDRESS_MISMATCH))
758 static int check_trust(X509_STORE_CTX *ctx)
762 int (*cb)(int xok,X509_STORE_CTX *xctx);
764 /* Check all trusted certificates in chain */
765 for (i = ctx->last_untrusted; i < sk_X509_num(ctx->chain); i++)
767 x = sk_X509_value(ctx->chain, i);
768 ok = X509_check_trust(x, ctx->param->trust, 0);
769 /* If explicitly trusted return trusted */
770 if (ok == X509_TRUST_TRUSTED)
771 return X509_TRUST_TRUSTED;
772 /* If explicitly rejected notify callback and reject if
775 if (ok == X509_TRUST_REJECTED)
777 ctx->error_depth = i;
778 ctx->current_cert = x;
779 ctx->error = X509_V_ERR_CERT_REJECTED;
782 return X509_TRUST_REJECTED;
785 /* If we accept partial chains and have at least one trusted
786 * certificate return success.
788 if (ctx->param->flags & X509_V_FLAG_PARTIAL_CHAIN)
790 if (ctx->last_untrusted < sk_X509_num(ctx->chain))
791 return X509_TRUST_TRUSTED;
792 if (sk_X509_num(ctx->chain) == 1)
795 x = sk_X509_value(ctx->chain, 0);
796 mx = lookup_cert_match(ctx, x);
799 (void)sk_X509_set(ctx->chain, 0, mx);
801 ctx->last_untrusted = 0;
802 return X509_TRUST_TRUSTED;
807 /* If no trusted certs in chain at all return untrusted and
808 * allow standard (no issuer cert) etc errors to be indicated.
810 return X509_TRUST_UNTRUSTED;
813 static int check_revocation(X509_STORE_CTX *ctx)
816 if (!(ctx->param->flags & X509_V_FLAG_CRL_CHECK))
818 if (ctx->param->flags & X509_V_FLAG_CRL_CHECK_ALL)
819 last = sk_X509_num(ctx->chain) - 1;
822 /* If checking CRL paths this isn't the EE certificate */
827 for(i = 0; i <= last; i++)
829 ctx->error_depth = i;
830 ok = check_cert(ctx);
836 static int check_cert(X509_STORE_CTX *ctx)
838 X509_CRL *crl = NULL, *dcrl = NULL;
841 unsigned int last_reasons;
842 cnum = ctx->error_depth;
843 x = sk_X509_value(ctx->chain, cnum);
844 ctx->current_cert = x;
845 ctx->current_issuer = NULL;
846 ctx->current_crl_score = 0;
847 ctx->current_reasons = 0;
848 while (ctx->current_reasons != CRLDP_ALL_REASONS)
850 last_reasons = ctx->current_reasons;
851 /* Try to retrieve relevant CRL */
853 ok = ctx->get_crl(ctx, &crl, x);
855 ok = get_crl_delta(ctx, &crl, &dcrl, x);
856 /* If error looking up CRL, nothing we can do except
861 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
862 ok = ctx->verify_cb(0, ctx);
865 ctx->current_crl = crl;
866 ok = ctx->check_crl(ctx, crl);
872 ok = ctx->check_crl(ctx, dcrl);
875 ok = ctx->cert_crl(ctx, dcrl, x);
882 /* Don't look in full CRL if delta reason is removefromCRL */
885 ok = ctx->cert_crl(ctx, crl, x);
894 /* If reasons not updated we wont get anywhere by
895 * another iteration, so exit loop.
897 if (last_reasons == ctx->current_reasons)
899 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
900 ok = ctx->verify_cb(0, ctx);
908 ctx->current_crl = NULL;
913 /* Check CRL times against values in X509_STORE_CTX */
915 static int check_crl_time(X509_STORE_CTX *ctx, X509_CRL *crl, int notify)
920 ctx->current_crl = crl;
921 if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
922 ptime = &ctx->param->check_time;
926 i=X509_cmp_time(X509_CRL_get_lastUpdate(crl), ptime);
931 ctx->error=X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD;
932 if (!ctx->verify_cb(0, ctx))
940 ctx->error=X509_V_ERR_CRL_NOT_YET_VALID;
941 if (!ctx->verify_cb(0, ctx))
945 if(X509_CRL_get_nextUpdate(crl))
947 i=X509_cmp_time(X509_CRL_get_nextUpdate(crl), ptime);
953 ctx->error=X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD;
954 if (!ctx->verify_cb(0, ctx))
957 /* Ignore expiry of base CRL is delta is valid */
958 if ((i < 0) && !(ctx->current_crl_score & CRL_SCORE_TIME_DELTA))
962 ctx->error=X509_V_ERR_CRL_HAS_EXPIRED;
963 if (!ctx->verify_cb(0, ctx))
969 ctx->current_crl = NULL;
974 static int get_crl_sk(X509_STORE_CTX *ctx, X509_CRL **pcrl, X509_CRL **pdcrl,
975 X509 **pissuer, int *pscore, unsigned int *preasons,
976 STACK_OF(X509_CRL) *crls)
978 int i, crl_score, best_score = *pscore;
979 unsigned int reasons, best_reasons = 0;
980 X509 *x = ctx->current_cert;
981 X509_CRL *crl, *best_crl = NULL;
982 X509 *crl_issuer = NULL, *best_crl_issuer = NULL;
984 for (i = 0; i < sk_X509_CRL_num(crls); i++)
986 crl = sk_X509_CRL_value(crls, i);
988 crl_score = get_crl_score(ctx, &crl_issuer, &reasons, crl, x);
990 if (crl_score > best_score)
993 best_crl_issuer = crl_issuer;
994 best_score = crl_score;
995 best_reasons = reasons;
1002 X509_CRL_free(*pcrl);
1004 *pissuer = best_crl_issuer;
1005 *pscore = best_score;
1006 *preasons = best_reasons;
1007 CRYPTO_add(&best_crl->references, 1, CRYPTO_LOCK_X509_CRL);
1010 X509_CRL_free(*pdcrl);
1013 get_delta_sk(ctx, pdcrl, pscore, best_crl, crls);
1016 if (best_score >= CRL_SCORE_VALID)
1022 /* Compare two CRL extensions for delta checking purposes. They should be
1023 * both present or both absent. If both present all fields must be identical.
1026 static int crl_extension_match(X509_CRL *a, X509_CRL *b, int nid)
1028 ASN1_OCTET_STRING *exta, *extb;
1030 i = X509_CRL_get_ext_by_NID(a, nid, -1);
1033 /* Can't have multiple occurrences */
1034 if (X509_CRL_get_ext_by_NID(a, nid, i) != -1)
1036 exta = X509_EXTENSION_get_data(X509_CRL_get_ext(a, i));
1041 i = X509_CRL_get_ext_by_NID(b, nid, -1);
1046 if (X509_CRL_get_ext_by_NID(b, nid, i) != -1)
1048 extb = X509_EXTENSION_get_data(X509_CRL_get_ext(b, i));
1060 if (ASN1_OCTET_STRING_cmp(exta, extb))
1066 /* See if a base and delta are compatible */
1068 static int check_delta_base(X509_CRL *delta, X509_CRL *base)
1070 /* Delta CRL must be a delta */
1071 if (!delta->base_crl_number)
1073 /* Base must have a CRL number */
1074 if (!base->crl_number)
1076 /* Issuer names must match */
1077 if (X509_NAME_cmp(X509_CRL_get_issuer(base),
1078 X509_CRL_get_issuer(delta)))
1080 /* AKID and IDP must match */
1081 if (!crl_extension_match(delta, base, NID_authority_key_identifier))
1083 if (!crl_extension_match(delta, base, NID_issuing_distribution_point))
1085 /* Delta CRL base number must not exceed Full CRL number. */
1086 if (ASN1_INTEGER_cmp(delta->base_crl_number, base->crl_number) > 0)
1088 /* Delta CRL number must exceed full CRL number */
1089 if (ASN1_INTEGER_cmp(delta->crl_number, base->crl_number) > 0)
1094 /* For a given base CRL find a delta... maybe extend to delta scoring
1095 * or retrieve a chain of deltas...
1098 static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pscore,
1099 X509_CRL *base, STACK_OF(X509_CRL) *crls)
1103 if (!(ctx->param->flags & X509_V_FLAG_USE_DELTAS))
1105 if (!((ctx->current_cert->ex_flags | base->flags) & EXFLAG_FRESHEST))
1107 for (i = 0; i < sk_X509_CRL_num(crls); i++)
1109 delta = sk_X509_CRL_value(crls, i);
1110 if (check_delta_base(delta, base))
1112 if (check_crl_time(ctx, delta, 0))
1113 *pscore |= CRL_SCORE_TIME_DELTA;
1114 CRYPTO_add(&delta->references, 1, CRYPTO_LOCK_X509_CRL);
1122 /* For a given CRL return how suitable it is for the supplied certificate 'x'.
1123 * The return value is a mask of several criteria.
1124 * If the issuer is not the certificate issuer this is returned in *pissuer.
1125 * The reasons mask is also used to determine if the CRL is suitable: if
1126 * no new reasons the CRL is rejected, otherwise reasons is updated.
1129 static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
1130 unsigned int *preasons,
1131 X509_CRL *crl, X509 *x)
1135 unsigned int tmp_reasons = *preasons, crl_reasons;
1137 /* First see if we can reject CRL straight away */
1139 /* Invalid IDP cannot be processed */
1140 if (crl->idp_flags & IDP_INVALID)
1142 /* Reason codes or indirect CRLs need extended CRL support */
1143 if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
1145 if (crl->idp_flags & (IDP_INDIRECT | IDP_REASONS))
1148 else if (crl->idp_flags & IDP_REASONS)
1150 /* If no new reasons reject */
1151 if (!(crl->idp_reasons & ~tmp_reasons))
1154 /* Don't process deltas at this stage */
1155 else if (crl->base_crl_number)
1157 /* If issuer name doesn't match certificate need indirect CRL */
1158 if (X509_NAME_cmp(X509_get_issuer_name(x), X509_CRL_get_issuer(crl)))
1160 if (!(crl->idp_flags & IDP_INDIRECT))
1164 crl_score |= CRL_SCORE_ISSUER_NAME;
1166 if (!(crl->flags & EXFLAG_CRITICAL))
1167 crl_score |= CRL_SCORE_NOCRITICAL;
1170 if (check_crl_time(ctx, crl, 0))
1171 crl_score |= CRL_SCORE_TIME;
1173 /* Check authority key ID and locate certificate issuer */
1174 crl_akid_check(ctx, crl, pissuer, &crl_score);
1176 /* If we can't locate certificate issuer at this point forget it */
1178 if (!(crl_score & CRL_SCORE_AKID))
1181 /* Check cert for matching CRL distribution points */
1183 if (crl_crldp_check(x, crl, crl_score, &crl_reasons))
1185 /* If no new reasons reject */
1186 if (!(crl_reasons & ~tmp_reasons))
1188 tmp_reasons |= crl_reasons;
1189 crl_score |= CRL_SCORE_SCOPE;
1192 *preasons = tmp_reasons;
1198 static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
1199 X509 **pissuer, int *pcrl_score)
1201 X509 *crl_issuer = NULL;
1202 X509_NAME *cnm = X509_CRL_get_issuer(crl);
1203 int cidx = ctx->error_depth;
1206 if (cidx != sk_X509_num(ctx->chain) - 1)
1209 crl_issuer = sk_X509_value(ctx->chain, cidx);
1211 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1213 if (*pcrl_score & CRL_SCORE_ISSUER_NAME)
1215 *pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_ISSUER_CERT;
1216 *pissuer = crl_issuer;
1221 for (cidx++; cidx < sk_X509_num(ctx->chain); cidx++)
1223 crl_issuer = sk_X509_value(ctx->chain, cidx);
1224 if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
1226 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1228 *pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_SAME_PATH;
1229 *pissuer = crl_issuer;
1234 /* Anything else needs extended CRL support */
1236 if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
1239 /* Otherwise the CRL issuer is not on the path. Look for it in the
1240 * set of untrusted certificates.
1242 for (i = 0; i < sk_X509_num(ctx->untrusted); i++)
1244 crl_issuer = sk_X509_value(ctx->untrusted, i);
1245 if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
1247 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1249 *pissuer = crl_issuer;
1250 *pcrl_score |= CRL_SCORE_AKID;
1256 /* Check the path of a CRL issuer certificate. This creates a new
1257 * X509_STORE_CTX and populates it with most of the parameters from the
1258 * parent. This could be optimised somewhat since a lot of path checking
1259 * will be duplicated by the parent, but this will rarely be used in
1263 static int check_crl_path(X509_STORE_CTX *ctx, X509 *x)
1265 X509_STORE_CTX crl_ctx;
1267 /* Don't allow recursive CRL path validation */
1270 if (!X509_STORE_CTX_init(&crl_ctx, ctx->ctx, x, ctx->untrusted))
1273 crl_ctx.crls = ctx->crls;
1274 /* Copy verify params across */
1275 X509_STORE_CTX_set0_param(&crl_ctx, ctx->param);
1277 crl_ctx.parent = ctx;
1278 crl_ctx.verify_cb = ctx->verify_cb;
1280 /* Verify CRL issuer */
1281 ret = X509_verify_cert(&crl_ctx);
1286 /* Check chain is acceptable */
1288 ret = check_crl_chain(ctx, ctx->chain, crl_ctx.chain);
1290 X509_STORE_CTX_cleanup(&crl_ctx);
1294 /* RFC3280 says nothing about the relationship between CRL path
1295 * and certificate path, which could lead to situations where a
1296 * certificate could be revoked or validated by a CA not authorised
1297 * to do so. RFC5280 is more strict and states that the two paths must
1298 * end in the same trust anchor, though some discussions remain...
1299 * until this is resolved we use the RFC5280 version
1302 static int check_crl_chain(X509_STORE_CTX *ctx,
1303 STACK_OF(X509) *cert_path,
1304 STACK_OF(X509) *crl_path)
1306 X509 *cert_ta, *crl_ta;
1307 cert_ta = sk_X509_value(cert_path, sk_X509_num(cert_path) - 1);
1308 crl_ta = sk_X509_value(crl_path, sk_X509_num(crl_path) - 1);
1309 if (!X509_cmp(cert_ta, crl_ta))
1314 /* Check for match between two dist point names: three separate cases.
1315 * 1. Both are relative names and compare X509_NAME types.
1316 * 2. One full, one relative. Compare X509_NAME to GENERAL_NAMES.
1317 * 3. Both are full names and compare two GENERAL_NAMES.
1318 * 4. One is NULL: automatic match.
1322 static int idp_check_dp(DIST_POINT_NAME *a, DIST_POINT_NAME *b)
1324 X509_NAME *nm = NULL;
1325 GENERAL_NAMES *gens = NULL;
1326 GENERAL_NAME *gena, *genb;
1334 /* Case 1: two X509_NAME */
1339 if (!X509_NAME_cmp(a->dpname, b->dpname))
1344 /* Case 2: set name and GENERAL_NAMES appropriately */
1346 gens = b->name.fullname;
1348 else if (b->type == 1)
1352 /* Case 2: set name and GENERAL_NAMES appropriately */
1353 gens = a->name.fullname;
1357 /* Handle case 2 with one GENERAL_NAMES and one X509_NAME */
1360 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
1362 gena = sk_GENERAL_NAME_value(gens, i);
1363 if (gena->type != GEN_DIRNAME)
1365 if (!X509_NAME_cmp(nm, gena->d.directoryName))
1371 /* Else case 3: two GENERAL_NAMES */
1373 for (i = 0; i < sk_GENERAL_NAME_num(a->name.fullname); i++)
1375 gena = sk_GENERAL_NAME_value(a->name.fullname, i);
1376 for (j = 0; j < sk_GENERAL_NAME_num(b->name.fullname); j++)
1378 genb = sk_GENERAL_NAME_value(b->name.fullname, j);
1379 if (!GENERAL_NAME_cmp(gena, genb))
1388 static int crldp_check_crlissuer(DIST_POINT *dp, X509_CRL *crl, int crl_score)
1391 X509_NAME *nm = X509_CRL_get_issuer(crl);
1392 /* If no CRLissuer return is successful iff don't need a match */
1394 return !!(crl_score & CRL_SCORE_ISSUER_NAME);
1395 for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++)
1397 GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
1398 if (gen->type != GEN_DIRNAME)
1400 if (!X509_NAME_cmp(gen->d.directoryName, nm))
1406 /* Check CRLDP and IDP */
1408 static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
1409 unsigned int *preasons)
1412 if (crl->idp_flags & IDP_ONLYATTR)
1414 if (x->ex_flags & EXFLAG_CA)
1416 if (crl->idp_flags & IDP_ONLYUSER)
1421 if (crl->idp_flags & IDP_ONLYCA)
1424 *preasons = crl->idp_reasons;
1425 for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
1427 DIST_POINT *dp = sk_DIST_POINT_value(x->crldp, i);
1428 if (crldp_check_crlissuer(dp, crl, crl_score))
1431 idp_check_dp(dp->distpoint, crl->idp->distpoint))
1433 *preasons &= dp->dp_reasons;
1438 if ((!crl->idp || !crl->idp->distpoint) && (crl_score & CRL_SCORE_ISSUER_NAME))
1443 /* Retrieve CRL corresponding to current certificate.
1444 * If deltas enabled try to find a delta CRL too
1447 static int get_crl_delta(X509_STORE_CTX *ctx,
1448 X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x)
1451 X509 *issuer = NULL;
1453 unsigned int reasons;
1454 X509_CRL *crl = NULL, *dcrl = NULL;
1455 STACK_OF(X509_CRL) *skcrl;
1456 X509_NAME *nm = X509_get_issuer_name(x);
1457 reasons = ctx->current_reasons;
1458 ok = get_crl_sk(ctx, &crl, &dcrl,
1459 &issuer, &crl_score, &reasons, ctx->crls);
1464 /* Lookup CRLs from store */
1466 skcrl = ctx->lookup_crls(ctx, nm);
1468 /* If no CRLs found and a near match from get_crl_sk use that */
1472 get_crl_sk(ctx, &crl, &dcrl, &issuer, &crl_score, &reasons, skcrl);
1474 sk_X509_CRL_pop_free(skcrl, X509_CRL_free);
1478 /* If we got any kind of CRL use it and return success */
1481 ctx->current_issuer = issuer;
1482 ctx->current_crl_score = crl_score;
1483 ctx->current_reasons = reasons;
1492 /* Check CRL validity */
1493 static int check_crl(X509_STORE_CTX *ctx, X509_CRL *crl)
1495 X509 *issuer = NULL;
1496 EVP_PKEY *ikey = NULL;
1497 int ok = 0, chnum, cnum;
1498 cnum = ctx->error_depth;
1499 chnum = sk_X509_num(ctx->chain) - 1;
1500 /* if we have an alternative CRL issuer cert use that */
1501 if (ctx->current_issuer)
1502 issuer = ctx->current_issuer;
1504 /* Else find CRL issuer: if not last certificate then issuer
1505 * is next certificate in chain.
1507 else if (cnum < chnum)
1508 issuer = sk_X509_value(ctx->chain, cnum + 1);
1511 issuer = sk_X509_value(ctx->chain, chnum);
1512 /* If not self signed, can't check signature */
1513 if(!ctx->check_issued(ctx, issuer, issuer))
1515 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER;
1516 ok = ctx->verify_cb(0, ctx);
1523 /* Skip most tests for deltas because they have already
1526 if (!crl->base_crl_number)
1528 /* Check for cRLSign bit if keyUsage present */
1529 if ((issuer->ex_flags & EXFLAG_KUSAGE) &&
1530 !(issuer->ex_kusage & KU_CRL_SIGN))
1532 ctx->error = X509_V_ERR_KEYUSAGE_NO_CRL_SIGN;
1533 ok = ctx->verify_cb(0, ctx);
1537 if (!(ctx->current_crl_score & CRL_SCORE_SCOPE))
1539 ctx->error = X509_V_ERR_DIFFERENT_CRL_SCOPE;
1540 ok = ctx->verify_cb(0, ctx);
1544 if (!(ctx->current_crl_score & CRL_SCORE_SAME_PATH))
1546 if (check_crl_path(ctx, ctx->current_issuer) <= 0)
1548 ctx->error = X509_V_ERR_CRL_PATH_VALIDATION_ERROR;
1549 ok = ctx->verify_cb(0, ctx);
1554 if (crl->idp_flags & IDP_INVALID)
1556 ctx->error = X509_V_ERR_INVALID_EXTENSION;
1557 ok = ctx->verify_cb(0, ctx);
1564 if (!(ctx->current_crl_score & CRL_SCORE_TIME))
1566 ok = check_crl_time(ctx, crl, 1);
1571 /* Attempt to get issuer certificate public key */
1572 ikey = X509_get_pubkey(issuer);
1576 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
1577 ok = ctx->verify_cb(0, ctx);
1583 rv = X509_CRL_check_suiteb(crl, ikey, ctx->param->flags);
1584 if (rv != X509_V_OK)
1587 ok = ctx->verify_cb(0, ctx);
1591 /* Verify CRL signature */
1592 if(X509_CRL_verify(crl, ikey) <= 0)
1594 ctx->error=X509_V_ERR_CRL_SIGNATURE_FAILURE;
1595 ok = ctx->verify_cb(0, ctx);
1604 EVP_PKEY_free(ikey);
1608 /* Check certificate against CRL */
1609 static int cert_crl(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x)
1613 /* The rules changed for this... previously if a CRL contained
1614 * unhandled critical extensions it could still be used to indicate
1615 * a certificate was revoked. This has since been changed since
1616 * critical extension can change the meaning of CRL entries.
1618 if (crl->flags & EXFLAG_CRITICAL)
1620 if (ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
1622 ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
1623 ok = ctx->verify_cb(0, ctx);
1627 /* Look for serial number of certificate in CRL
1628 * If found make sure reason is not removeFromCRL.
1630 if (X509_CRL_get0_by_cert(crl, &rev, x))
1632 if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
1634 ctx->error = X509_V_ERR_CERT_REVOKED;
1635 ok = ctx->verify_cb(0, ctx);
1643 static int check_policy(X509_STORE_CTX *ctx)
1648 ret = X509_policy_check(&ctx->tree, &ctx->explicit_policy, ctx->chain,
1649 ctx->param->policies, ctx->param->flags);
1652 X509err(X509_F_CHECK_POLICY,ERR_R_MALLOC_FAILURE);
1655 /* Invalid or inconsistent extensions */
1658 /* Locate certificates with bad extensions and notify
1663 for (i = 1; i < sk_X509_num(ctx->chain); i++)
1665 x = sk_X509_value(ctx->chain, i);
1666 if (!(x->ex_flags & EXFLAG_INVALID_POLICY))
1668 ctx->current_cert = x;
1669 ctx->error = X509_V_ERR_INVALID_POLICY_EXTENSION;
1670 if(!ctx->verify_cb(0, ctx))
1677 ctx->current_cert = NULL;
1678 ctx->error = X509_V_ERR_NO_EXPLICIT_POLICY;
1679 return ctx->verify_cb(0, ctx);
1682 if (ctx->param->flags & X509_V_FLAG_NOTIFY_POLICY)
1684 ctx->current_cert = NULL;
1685 ctx->error = X509_V_OK;
1686 if (!ctx->verify_cb(2, ctx))
1693 static int check_cert_time(X509_STORE_CTX *ctx, X509 *x)
1698 if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
1699 ptime = &ctx->param->check_time;
1703 i=X509_cmp_time(X509_get_notBefore(x), ptime);
1706 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
1707 ctx->current_cert=x;
1708 if (!ctx->verify_cb(0, ctx))
1714 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
1715 ctx->current_cert=x;
1716 if (!ctx->verify_cb(0, ctx))
1720 i=X509_cmp_time(X509_get_notAfter(x), ptime);
1723 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
1724 ctx->current_cert=x;
1725 if (!ctx->verify_cb(0, ctx))
1731 ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
1732 ctx->current_cert=x;
1733 if (!ctx->verify_cb(0, ctx))
1740 static int internal_verify(X509_STORE_CTX *ctx)
1744 EVP_PKEY *pkey=NULL;
1745 int (*cb)(int xok,X509_STORE_CTX *xctx);
1749 n=sk_X509_num(ctx->chain);
1750 ctx->error_depth=n-1;
1752 xi=sk_X509_value(ctx->chain,n);
1754 if (ctx->check_issued(ctx, xi, xi))
1758 if (ctx->param->flags & X509_V_FLAG_PARTIAL_CHAIN && n == 0)
1759 return check_cert_time(ctx, xi);
1762 ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
1763 ctx->current_cert=xi;
1771 xs=sk_X509_value(ctx->chain,n);
1775 /* ctx->error=0; not needed */
1780 /* Skip signature check for self signed certificates unless
1781 * explicitly asked for. It doesn't add any security and
1784 if (!xs->valid && (xs != xi || (ctx->param->flags & X509_V_FLAG_CHECK_SS_SIGNATURE)))
1786 if ((pkey=X509_get_pubkey(xi)) == NULL)
1788 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
1789 ctx->current_cert=xi;
1793 else if (X509_verify(xs,pkey) <= 0)
1795 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
1796 ctx->current_cert=xs;
1800 EVP_PKEY_free(pkey);
1804 EVP_PKEY_free(pkey);
1810 ok = check_cert_time(ctx, xs);
1814 /* The last error (if any) is still in the error value */
1815 ctx->current_issuer=xi;
1816 ctx->current_cert=xs;
1824 xs=sk_X509_value(ctx->chain,n);
1832 int X509_cmp_current_time(const ASN1_TIME *ctm)
1834 return X509_cmp_time(ctm, NULL);
1837 int X509_cmp_time(const ASN1_TIME *ctm, time_t *cmp_time)
1842 char buff1[24],buff2[24],*p;
1847 str=(char *)ctm->data;
1848 if (ctm->type == V_ASN1_UTCTIME)
1850 if ((i < 11) || (i > 17)) return 0;
1857 if (i < 13) return 0;
1863 if ((*str == 'Z') || (*str == '-') || (*str == '+'))
1864 { *(p++)='0'; *(p++)='0'; }
1869 /* Skip any fractional seconds... */
1873 while ((*str >= '0') && (*str <= '9')) str++;
1884 if ((*str != '+') && (*str != '-'))
1886 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
1887 offset+=(str[3]-'0')*10+(str[4]-'0');
1893 atm.length=sizeof(buff2);
1894 atm.data=(unsigned char *)buff2;
1896 if (X509_time_adj(&atm, offset*60, cmp_time) == NULL)
1899 if (ctm->type == V_ASN1_UTCTIME)
1901 i=(buff1[0]-'0')*10+(buff1[1]-'0');
1902 if (i < 50) i+=100; /* cf. RFC 2459 */
1903 j=(buff2[0]-'0')*10+(buff2[1]-'0');
1906 if (i < j) return -1;
1907 if (i > j) return 1;
1909 i=strcmp(buff1,buff2);
1910 if (i == 0) /* wait a second then return younger :-) */
1916 ASN1_TIME *X509_gmtime_adj(ASN1_TIME *s, long adj)
1918 return X509_time_adj(s, adj, NULL);
1921 ASN1_TIME *X509_time_adj(ASN1_TIME *s, long offset_sec, time_t *in_tm)
1923 return X509_time_adj_ex(s, 0, offset_sec, in_tm);
1926 ASN1_TIME *X509_time_adj_ex(ASN1_TIME *s,
1927 int offset_day, long offset_sec, time_t *in_tm)
1931 if (in_tm) t = *in_tm;
1934 if (s && !(s->flags & ASN1_STRING_FLAG_MSTRING))
1936 if (s->type == V_ASN1_UTCTIME)
1937 return ASN1_UTCTIME_adj(s,t, offset_day, offset_sec);
1938 if (s->type == V_ASN1_GENERALIZEDTIME)
1939 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day,
1942 return ASN1_TIME_adj(s, t, offset_day, offset_sec);
1945 int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
1947 EVP_PKEY *ktmp=NULL,*ktmp2;
1950 if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return 1;
1952 for (i=0; i<sk_X509_num(chain); i++)
1954 ktmp=X509_get_pubkey(sk_X509_value(chain,i));
1957 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
1960 if (!EVP_PKEY_missing_parameters(ktmp))
1964 EVP_PKEY_free(ktmp);
1970 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
1974 /* first, populate the other certs */
1975 for (j=i-1; j >= 0; j--)
1977 ktmp2=X509_get_pubkey(sk_X509_value(chain,j));
1978 EVP_PKEY_copy_parameters(ktmp2,ktmp);
1979 EVP_PKEY_free(ktmp2);
1982 if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
1983 EVP_PKEY_free(ktmp);
1987 /* Make a delta CRL as the diff between two full CRLs */
1989 X509_CRL *X509_CRL_diff(X509_CRL *base, X509_CRL *newer,
1990 EVP_PKEY *skey, const EVP_MD *md, unsigned int flags)
1992 X509_CRL *crl = NULL;
1994 STACK_OF(X509_REVOKED) *revs = NULL;
1995 /* CRLs can't be delta already */
1996 if (base->base_crl_number || newer->base_crl_number)
1998 X509err(X509_F_X509_CRL_DIFF, X509_R_CRL_ALREADY_DELTA);
2001 /* Base and new CRL must have a CRL number */
2002 if (!base->crl_number || !newer->crl_number)
2004 X509err(X509_F_X509_CRL_DIFF, X509_R_NO_CRL_NUMBER);
2007 /* Issuer names must match */
2008 if (X509_NAME_cmp(X509_CRL_get_issuer(base),
2009 X509_CRL_get_issuer(newer)))
2011 X509err(X509_F_X509_CRL_DIFF, X509_R_ISSUER_MISMATCH);
2014 /* AKID and IDP must match */
2015 if (!crl_extension_match(base, newer, NID_authority_key_identifier))
2017 X509err(X509_F_X509_CRL_DIFF, X509_R_AKID_MISMATCH);
2020 if (!crl_extension_match(base, newer, NID_issuing_distribution_point))
2022 X509err(X509_F_X509_CRL_DIFF, X509_R_IDP_MISMATCH);
2025 /* Newer CRL number must exceed full CRL number */
2026 if (ASN1_INTEGER_cmp(newer->crl_number, base->crl_number) <= 0)
2028 X509err(X509_F_X509_CRL_DIFF, X509_R_NEWER_CRL_NOT_NEWER);
2031 /* CRLs must verify */
2032 if (skey && (X509_CRL_verify(base, skey) <= 0 ||
2033 X509_CRL_verify(newer, skey) <= 0))
2035 X509err(X509_F_X509_CRL_DIFF, X509_R_CRL_VERIFY_FAILURE);
2038 /* Create new CRL */
2039 crl = X509_CRL_new();
2040 if (!crl || !X509_CRL_set_version(crl, 1))
2042 /* Set issuer name */
2043 if (!X509_CRL_set_issuer_name(crl, X509_CRL_get_issuer(newer)))
2046 if (!X509_CRL_set_lastUpdate(crl, X509_CRL_get_lastUpdate(newer)))
2048 if (!X509_CRL_set_nextUpdate(crl, X509_CRL_get_nextUpdate(newer)))
2051 /* Set base CRL number: must be critical */
2053 if (!X509_CRL_add1_ext_i2d(crl, NID_delta_crl, base->crl_number, 1, 0))
2056 /* Copy extensions across from newest CRL to delta: this will set
2057 * CRL number to correct value too.
2060 for (i = 0; i < X509_CRL_get_ext_count(newer); i++)
2062 X509_EXTENSION *ext;
2063 ext = X509_CRL_get_ext(newer, i);
2064 if (!X509_CRL_add_ext(crl, ext, -1))
2068 /* Go through revoked entries, copying as needed */
2070 revs = X509_CRL_get_REVOKED(newer);
2072 for (i = 0; i < sk_X509_REVOKED_num(revs); i++)
2074 X509_REVOKED *rvn, *rvtmp;
2075 rvn = sk_X509_REVOKED_value(revs, i);
2076 /* Add only if not also in base.
2077 * TODO: need something cleverer here for some more complex
2078 * CRLs covering multiple CAs.
2080 if (!X509_CRL_get0_by_serial(base, &rvtmp, rvn->serialNumber))
2082 rvtmp = X509_REVOKED_dup(rvn);
2085 if (!X509_CRL_add0_revoked(crl, rvtmp))
2087 X509_REVOKED_free(rvtmp);
2092 /* TODO: optionally prune deleted entries */
2094 if (skey && md && !X509_CRL_sign(crl, skey, md))
2100 X509err(X509_F_X509_CRL_DIFF, ERR_R_MALLOC_FAILURE);
2106 int X509_STORE_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
2107 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
2109 /* This function is (usually) called only once, by
2110 * SSL_get_ex_data_X509_STORE_CTX_idx (ssl/ssl_cert.c). */
2111 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509_STORE_CTX, argl, argp,
2112 new_func, dup_func, free_func);
2115 int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
2117 return CRYPTO_set_ex_data(&ctx->ex_data,idx,data);
2120 void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
2122 return CRYPTO_get_ex_data(&ctx->ex_data,idx);
2125 int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
2130 void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
2135 int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
2137 return ctx->error_depth;
2140 X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
2142 return ctx->current_cert;
2145 STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
2150 STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx)
2154 return X509_chain_up_ref(ctx->chain);
2157 X509 *X509_STORE_CTX_get0_current_issuer(X509_STORE_CTX *ctx)
2159 return ctx->current_issuer;
2162 X509_CRL *X509_STORE_CTX_get0_current_crl(X509_STORE_CTX *ctx)
2164 return ctx->current_crl;
2167 X509_STORE_CTX *X509_STORE_CTX_get0_parent_ctx(X509_STORE_CTX *ctx)
2172 void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
2177 void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
2182 void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk)
2187 int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose)
2189 return X509_STORE_CTX_purpose_inherit(ctx, 0, purpose, 0);
2192 int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust)
2194 return X509_STORE_CTX_purpose_inherit(ctx, 0, 0, trust);
2197 /* This function is used to set the X509_STORE_CTX purpose and trust
2198 * values. This is intended to be used when another structure has its
2199 * own trust and purpose values which (if set) will be inherited by
2200 * the ctx. If they aren't set then we will usually have a default
2201 * purpose in mind which should then be used to set the trust value.
2202 * An example of this is SSL use: an SSL structure will have its own
2203 * purpose and trust settings which the application can set: if they
2204 * aren't set then we use the default of SSL client/server.
2207 int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
2208 int purpose, int trust)
2211 /* If purpose not set use default */
2212 if (!purpose) purpose = def_purpose;
2213 /* If we have a purpose then check it is valid */
2217 idx = X509_PURPOSE_get_by_id(purpose);
2220 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
2221 X509_R_UNKNOWN_PURPOSE_ID);
2224 ptmp = X509_PURPOSE_get0(idx);
2225 if (ptmp->trust == X509_TRUST_DEFAULT)
2227 idx = X509_PURPOSE_get_by_id(def_purpose);
2230 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
2231 X509_R_UNKNOWN_PURPOSE_ID);
2234 ptmp = X509_PURPOSE_get0(idx);
2236 /* If trust not set then get from purpose default */
2237 if (!trust) trust = ptmp->trust;
2241 idx = X509_TRUST_get_by_id(trust);
2244 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
2245 X509_R_UNKNOWN_TRUST_ID);
2250 if (purpose && !ctx->param->purpose) ctx->param->purpose = purpose;
2251 if (trust && !ctx->param->trust) ctx->param->trust = trust;
2255 X509_STORE_CTX *X509_STORE_CTX_new(void)
2257 X509_STORE_CTX *ctx;
2258 ctx = (X509_STORE_CTX *)OPENSSL_malloc(sizeof(X509_STORE_CTX));
2261 X509err(X509_F_X509_STORE_CTX_NEW,ERR_R_MALLOC_FAILURE);
2264 memset(ctx, 0, sizeof(X509_STORE_CTX));
2268 void X509_STORE_CTX_free(X509_STORE_CTX *ctx)
2270 X509_STORE_CTX_cleanup(ctx);
2274 int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
2275 STACK_OF(X509) *chain)
2279 ctx->current_method=0;
2281 ctx->untrusted=chain;
2283 ctx->last_untrusted=0;
2284 ctx->other_ctx=NULL;
2288 ctx->explicit_policy=0;
2290 ctx->current_cert=NULL;
2291 ctx->current_issuer=NULL;
2292 ctx->current_crl=NULL;
2293 ctx->current_crl_score=0;
2294 ctx->current_reasons=0;
2298 ctx->param = X509_VERIFY_PARAM_new();
2302 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2306 /* Inherit callbacks and flags from X509_STORE if not set
2312 ret = X509_VERIFY_PARAM_inherit(ctx->param, store->param);
2314 ctx->param->inh_flags |= X509_VP_FLAG_DEFAULT|X509_VP_FLAG_ONCE;
2318 ctx->verify_cb = store->verify_cb;
2319 ctx->cleanup = store->cleanup;
2325 ret = X509_VERIFY_PARAM_inherit(ctx->param,
2326 X509_VERIFY_PARAM_lookup("default"));
2330 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2334 if (store && store->check_issued)
2335 ctx->check_issued = store->check_issued;
2337 ctx->check_issued = check_issued;
2339 if (store && store->get_issuer)
2340 ctx->get_issuer = store->get_issuer;
2342 ctx->get_issuer = X509_STORE_CTX_get1_issuer;
2344 if (store && store->verify_cb)
2345 ctx->verify_cb = store->verify_cb;
2347 ctx->verify_cb = null_callback;
2349 if (store && store->verify)
2350 ctx->verify = store->verify;
2352 ctx->verify = internal_verify;
2354 if (store && store->check_revocation)
2355 ctx->check_revocation = store->check_revocation;
2357 ctx->check_revocation = check_revocation;
2359 if (store && store->get_crl)
2360 ctx->get_crl = store->get_crl;
2362 ctx->get_crl = NULL;
2364 if (store && store->check_crl)
2365 ctx->check_crl = store->check_crl;
2367 ctx->check_crl = check_crl;
2369 if (store && store->cert_crl)
2370 ctx->cert_crl = store->cert_crl;
2372 ctx->cert_crl = cert_crl;
2374 if (store && store->lookup_certs)
2375 ctx->lookup_certs = store->lookup_certs;
2377 ctx->lookup_certs = X509_STORE_get1_certs;
2379 if (store && store->lookup_crls)
2380 ctx->lookup_crls = store->lookup_crls;
2382 ctx->lookup_crls = X509_STORE_get1_crls;
2384 ctx->check_policy = check_policy;
2387 /* This memset() can't make any sense anyway, so it's removed. As
2388 * X509_STORE_CTX_cleanup does a proper "free" on the ex_data, we put a
2389 * corresponding "new" here and remove this bogus initialisation. */
2390 /* memset(&(ctx->ex_data),0,sizeof(CRYPTO_EX_DATA)); */
2391 if(!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx,
2395 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2401 /* Set alternative lookup method: just a STACK of trusted certificates.
2402 * This avoids X509_STORE nastiness where it isn't needed.
2405 void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
2407 ctx->other_ctx = sk;
2408 ctx->get_issuer = get_issuer_sk;
2411 void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx)
2413 if (ctx->cleanup) ctx->cleanup(ctx);
2414 if (ctx->param != NULL)
2416 if (ctx->parent == NULL)
2417 X509_VERIFY_PARAM_free(ctx->param);
2420 if (ctx->tree != NULL)
2422 X509_policy_tree_free(ctx->tree);
2425 if (ctx->chain != NULL)
2427 sk_X509_pop_free(ctx->chain,X509_free);
2430 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx, &(ctx->ex_data));
2431 memset(&ctx->ex_data,0,sizeof(CRYPTO_EX_DATA));
2434 void X509_STORE_CTX_set_depth(X509_STORE_CTX *ctx, int depth)
2436 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2439 void X509_STORE_CTX_set_flags(X509_STORE_CTX *ctx, unsigned long flags)
2441 X509_VERIFY_PARAM_set_flags(ctx->param, flags);
2444 void X509_STORE_CTX_set_time(X509_STORE_CTX *ctx, unsigned long flags, time_t t)
2446 X509_VERIFY_PARAM_set_time(ctx->param, t);
2449 void X509_STORE_CTX_set_verify_cb(X509_STORE_CTX *ctx,
2450 int (*verify_cb)(int, X509_STORE_CTX *))
2452 ctx->verify_cb=verify_cb;
2455 X509_POLICY_TREE *X509_STORE_CTX_get0_policy_tree(X509_STORE_CTX *ctx)
2460 int X509_STORE_CTX_get_explicit_policy(X509_STORE_CTX *ctx)
2462 return ctx->explicit_policy;
2465 int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name)
2467 const X509_VERIFY_PARAM *param;
2468 param = X509_VERIFY_PARAM_lookup(name);
2471 return X509_VERIFY_PARAM_inherit(ctx->param, param);
2474 X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx)
2479 void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param)
2482 X509_VERIFY_PARAM_free(ctx->param);
2486 IMPLEMENT_STACK_OF(X509)
2487 IMPLEMENT_ASN1_SET_OF(X509)
2489 IMPLEMENT_STACK_OF(X509_NAME)
2491 IMPLEMENT_STACK_OF(X509_ATTRIBUTE)
2492 IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE)