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>
74 /* CRL score values */
76 /* No unhandled critical extensions */
78 #define CRL_SCORE_NOCRITICAL 0x100
80 /* certificate is within CRL scope */
82 #define CRL_SCORE_SCOPE 0x080
86 #define CRL_SCORE_TIME 0x040
88 /* Issuer name matches certificate */
90 #define CRL_SCORE_ISSUER_NAME 0x020
92 /* If this score or above CRL is probably valid */
94 #define CRL_SCORE_VALID (CRL_SCORE_NOCRITICAL|CRL_SCORE_TIME|CRL_SCORE_SCOPE)
96 /* CRL issuer is certificate issuer */
98 #define CRL_SCORE_ISSUER_CERT 0x018
100 /* CRL issuer is on certificate path */
102 #define CRL_SCORE_SAME_PATH 0x008
104 /* CRL issuer matches CRL AKID */
106 #define CRL_SCORE_AKID 0x004
108 /* Have a delta CRL with valid times */
110 #define CRL_SCORE_TIME_DELTA 0x002
112 static int null_callback(int ok,X509_STORE_CTX *e);
113 static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
114 static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x);
115 static int check_chain_extensions(X509_STORE_CTX *ctx);
116 static int check_name_constraints(X509_STORE_CTX *ctx);
117 static int check_id(X509_STORE_CTX *ctx);
118 static int check_trust(X509_STORE_CTX *ctx);
119 static int check_revocation(X509_STORE_CTX *ctx);
120 static int check_cert(X509_STORE_CTX *ctx);
121 static int check_policy(X509_STORE_CTX *ctx);
123 static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
124 unsigned int *preasons,
125 X509_CRL *crl, X509 *x);
126 static int get_crl_delta(X509_STORE_CTX *ctx,
127 X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x);
128 static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pcrl_score,
129 X509_CRL *base, STACK_OF(X509_CRL) *crls);
130 static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
131 X509 **pissuer, int *pcrl_score);
132 static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
133 unsigned int *preasons);
134 static int check_crl_path(X509_STORE_CTX *ctx, X509 *x);
135 static int check_crl_chain(X509_STORE_CTX *ctx,
136 STACK_OF(X509) *cert_path,
137 STACK_OF(X509) *crl_path);
139 static int internal_verify(X509_STORE_CTX *ctx);
140 const char X509_version[]="X.509" OPENSSL_VERSION_PTEXT;
143 static int null_callback(int ok, X509_STORE_CTX *e)
149 static int x509_subject_cmp(X509 **a, X509 **b)
151 return X509_subject_name_cmp(*a,*b);
154 /* Return 1 is a certificate is self signed */
155 static int cert_self_signed(X509 *x)
157 X509_check_purpose(x, -1, 0);
158 if (x->ex_flags & EXFLAG_SS)
164 /* Given a certificate try and find an exact match in the store */
166 static X509 *lookup_cert_match(X509_STORE_CTX *ctx, X509 *x)
168 STACK_OF(X509) *certs;
171 /* Lookup all certs with matching subject name */
172 certs = ctx->lookup_certs(ctx, X509_get_subject_name(x));
175 /* Look for exact match */
176 for (i = 0; i < sk_X509_num(certs); i++)
178 xtmp = sk_X509_value(certs, i);
179 if (!X509_cmp(xtmp, x))
182 if (i < sk_X509_num(certs))
183 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
186 sk_X509_pop_free(certs, X509_free);
190 int X509_verify_cert(X509_STORE_CTX *ctx)
192 X509 *x,*xtmp,*chain_ss=NULL;
194 X509_VERIFY_PARAM *param = ctx->param;
197 int (*cb)(int xok,X509_STORE_CTX *xctx);
198 STACK_OF(X509) *sktmp=NULL;
199 if (ctx->cert == NULL)
201 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
207 /* first we make sure the chain we are going to build is
208 * present and that the first entry is in place */
209 if (ctx->chain == NULL)
211 if ( ((ctx->chain=sk_X509_new_null()) == NULL) ||
212 (!sk_X509_push(ctx->chain,ctx->cert)))
214 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
217 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
218 ctx->last_untrusted=1;
221 /* We use a temporary STACK so we can chop and hack at it */
222 if (ctx->untrusted != NULL
223 && (sktmp=sk_X509_dup(ctx->untrusted)) == NULL)
225 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
229 num=sk_X509_num(ctx->chain);
230 x=sk_X509_value(ctx->chain,num-1);
236 /* If we have enough, we break */
237 if (depth < num) break; /* FIXME: If this happens, we should take
238 * note of it and, if appropriate, use the
239 * X509_V_ERR_CERT_CHAIN_TOO_LONG error
243 /* If we are self signed, we break */
244 if (cert_self_signed(x))
246 /* If asked see if we can find issuer in trusted store first */
247 if (ctx->param->flags & X509_V_FLAG_TRUSTED_FIRST)
249 ok = ctx->get_issuer(&xtmp, ctx, x);
252 /* If successful for now free up cert so it
253 * will be picked up again later.
262 /* If we were passed a cert chain, use it first */
263 if (ctx->untrusted != NULL)
265 xtmp=find_issuer(ctx, sktmp,x);
268 if (!sk_X509_push(ctx->chain,xtmp))
270 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
273 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
274 (void)sk_X509_delete_ptr(sktmp,xtmp);
275 ctx->last_untrusted++;
278 /* reparse the full chain for
286 /* at this point, chain should contain a list of untrusted
287 * certificates. We now need to add at least one trusted one,
288 * if possible, otherwise we complain. */
290 /* Examine last certificate in chain and see if it
294 i=sk_X509_num(ctx->chain);
295 x=sk_X509_value(ctx->chain,i-1);
296 if (cert_self_signed(x))
298 /* we have a self signed certificate */
299 if (sk_X509_num(ctx->chain) == 1)
301 /* We have a single self signed certificate: see if
302 * we can find it in the store. We must have an exact
303 * match to avoid possible impersonation.
305 ok = ctx->get_issuer(&xtmp, ctx, x);
306 if ((ok <= 0) || X509_cmp(x, xtmp))
308 ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
310 ctx->error_depth=i-1;
311 if (ok == 1) X509_free(xtmp);
318 /* We have a match: replace certificate with store version
319 * so we get any trust settings.
323 (void)sk_X509_set(ctx->chain, i - 1, x);
324 ctx->last_untrusted=0;
329 /* extract and save self signed certificate for later use */
330 chain_ss=sk_X509_pop(ctx->chain);
331 ctx->last_untrusted--;
333 x=sk_X509_value(ctx->chain,num-1);
337 /* We now lookup certs from the certificate store */
340 /* If we have enough, we break */
341 if (depth < num) break;
343 /* If we are self signed, we break */
344 if (cert_self_signed(x))
347 ok = ctx->get_issuer(&xtmp, ctx, x);
349 if (ok < 0) return ok;
353 if (!sk_X509_push(ctx->chain,x))
356 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
362 /* we now have our chain, lets check it... */
364 i = check_trust(ctx);
366 /* If explicitly rejected error */
367 if (i == X509_TRUST_REJECTED)
369 /* If not explicitly trusted then indicate error unless it's
370 * a single self signed certificate in which case we've indicated
371 * an error already and set bad_chain == 1
373 if (i != X509_TRUST_TRUSTED && !bad_chain)
375 if ((chain_ss == NULL) || !ctx->check_issued(ctx, x, chain_ss))
377 if (ctx->last_untrusted >= num)
378 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
380 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
386 sk_X509_push(ctx->chain,chain_ss);
388 ctx->last_untrusted=num;
389 ctx->current_cert=chain_ss;
390 ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
394 ctx->error_depth=num-1;
400 /* We have the chain complete: now we need to check its purpose */
401 ok = check_chain_extensions(ctx);
405 /* Check name constraints */
407 ok = check_name_constraints(ctx);
415 /* We may as well copy down any DSA parameters that are required */
416 X509_get_pubkey_parameters(NULL,ctx->chain);
418 /* Check revocation status: we do this after copying parameters
419 * because they may be needed for CRL signature verification.
422 ok = ctx->check_revocation(ctx);
425 i = X509_chain_check_suiteb(&ctx->error_depth, NULL, ctx->chain,
430 ctx->current_cert = sk_X509_value(ctx->chain, ctx->error_depth);
436 /* At this point, we have a chain and need to verify it */
437 if (ctx->verify != NULL)
440 ok=internal_verify(ctx);
443 #ifndef OPENSSL_NO_RFC3779
444 /* RFC 3779 path validation, now that CRL check has been done */
445 ok = v3_asid_validate_path(ctx);
447 ok = v3_addr_validate_path(ctx);
451 /* If we get this far evaluate policies */
452 if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK))
453 ok = ctx->check_policy(ctx);
458 X509_get_pubkey_parameters(NULL,ctx->chain);
460 if (sktmp != NULL) sk_X509_free(sktmp);
461 if (chain_ss != NULL) X509_free(chain_ss);
466 /* Given a STACK_OF(X509) find the issuer of cert (if any)
469 static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x)
472 X509 *issuer, *rv = NULL;;
473 for (i = 0; i < sk_X509_num(sk); i++)
475 issuer = sk_X509_value(sk, i);
476 if (ctx->check_issued(ctx, x, issuer))
479 if (x509_check_cert_time(ctx, rv, 1))
486 /* Given a possible certificate and issuer check them */
488 static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer)
492 return cert_self_signed(x);
493 ret = X509_check_issued(issuer, x);
494 if (ret == X509_V_OK)
498 /* Special case: single self signed certificate */
499 if (cert_self_signed(x) && sk_X509_num(ctx->chain) == 1)
501 for (i = 0; i < sk_X509_num(ctx->chain); i++)
503 ch = sk_X509_value(ctx->chain, i);
504 if (ch == issuer || !X509_cmp(ch, issuer))
506 ret = X509_V_ERR_PATH_LOOP;
512 if (ret == X509_V_OK)
514 /* If we haven't asked for issuer errors don't set ctx */
515 if (!(ctx->param->flags & X509_V_FLAG_CB_ISSUER_CHECK))
519 ctx->current_cert = x;
520 ctx->current_issuer = issuer;
521 return ctx->verify_cb(0, ctx);
525 /* Alternative lookup method: look from a STACK stored in other_ctx */
527 static int get_issuer_sk(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
529 *issuer = find_issuer(ctx, ctx->other_ctx, x);
532 CRYPTO_add(&(*issuer)->references,1,CRYPTO_LOCK_X509);
540 /* Check a certificate chains extensions for consistency
541 * with the supplied purpose
544 static int check_chain_extensions(X509_STORE_CTX *ctx)
546 #ifdef OPENSSL_NO_CHAIN_VERIFY
549 int i, ok=0, must_be_ca, plen = 0;
551 int (*cb)(int xok,X509_STORE_CTX *xctx);
552 int proxy_path_length = 0;
554 int allow_proxy_certs;
557 /* must_be_ca can have 1 of 3 values:
558 -1: we accept both CA and non-CA certificates, to allow direct
559 use of self-signed certificates (which are marked as CA).
560 0: we only accept non-CA certificates. This is currently not
561 used, but the possibility is present for future extensions.
562 1: we only accept CA certificates. This is currently used for
563 all certificates in the chain except the leaf certificate.
567 /* CRL path validation */
570 allow_proxy_certs = 0;
571 purpose = X509_PURPOSE_CRL_SIGN;
576 !!(ctx->param->flags & X509_V_FLAG_ALLOW_PROXY_CERTS);
577 /* A hack to keep people who don't want to modify their
579 if (getenv("OPENSSL_ALLOW_PROXY_CERTS"))
580 allow_proxy_certs = 1;
581 purpose = ctx->param->purpose;
584 /* Check all untrusted certificates */
585 for (i = 0; i < ctx->last_untrusted; i++)
588 x = sk_X509_value(ctx->chain, i);
589 if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
590 && (x->ex_flags & EXFLAG_CRITICAL))
592 ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION;
593 ctx->error_depth = i;
594 ctx->current_cert = x;
598 if (!allow_proxy_certs && (x->ex_flags & EXFLAG_PROXY))
600 ctx->error = X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED;
601 ctx->error_depth = i;
602 ctx->current_cert = x;
606 ret = X509_check_ca(x);
610 if ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
611 && (ret != 1) && (ret != 0))
614 ctx->error = X509_V_ERR_INVALID_CA;
623 ctx->error = X509_V_ERR_INVALID_NON_CA;
630 || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
634 ctx->error = X509_V_ERR_INVALID_CA;
642 ctx->error_depth = i;
643 ctx->current_cert = x;
647 if (ctx->param->purpose > 0)
649 ret = X509_check_purpose(x, purpose, must_be_ca > 0);
651 || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
654 ctx->error = X509_V_ERR_INVALID_PURPOSE;
655 ctx->error_depth = i;
656 ctx->current_cert = x;
661 /* Check pathlen if not self issued */
662 if ((i > 1) && !(x->ex_flags & EXFLAG_SI)
663 && (x->ex_pathlen != -1)
664 && (plen > (x->ex_pathlen + proxy_path_length + 1)))
666 ctx->error = X509_V_ERR_PATH_LENGTH_EXCEEDED;
667 ctx->error_depth = i;
668 ctx->current_cert = x;
672 /* Increment path length if not self issued */
673 if (!(x->ex_flags & EXFLAG_SI))
675 /* If this certificate is a proxy certificate, the next
676 certificate must be another proxy certificate or a EE
677 certificate. If not, the next certificate must be a
679 if (x->ex_flags & EXFLAG_PROXY)
681 if (x->ex_pcpathlen != -1 && i > x->ex_pcpathlen)
684 X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
685 ctx->error_depth = i;
686 ctx->current_cert = x;
702 static int check_name_constraints(X509_STORE_CTX *ctx)
706 /* Check name constraints for all certificates */
707 for (i = sk_X509_num(ctx->chain) - 1; i >= 0; i--)
709 x = sk_X509_value(ctx->chain, i);
710 /* Ignore self issued certs unless last in chain */
711 if (i && (x->ex_flags & EXFLAG_SI))
713 /* Check against constraints for all certificates higher in
714 * chain including trust anchor. Trust anchor not strictly
715 * speaking needed but if it includes constraints it is to be
716 * assumed it expects them to be obeyed.
718 for (j = sk_X509_num(ctx->chain) - 1; j > i; j--)
720 NAME_CONSTRAINTS *nc = sk_X509_value(ctx->chain, j)->nc;
723 rv = NAME_CONSTRAINTS_check(x, nc);
727 ctx->error_depth = i;
728 ctx->current_cert = x;
729 if (!ctx->verify_cb(0,ctx))
738 static int check_id_error(X509_STORE_CTX *ctx, int errcode)
740 ctx->error = errcode;
741 ctx->current_cert = ctx->cert;
742 ctx->error_depth = 0;
743 return ctx->verify_cb(0, ctx);
746 static int check_id(X509_STORE_CTX *ctx)
748 X509_VERIFY_PARAM *vpm = ctx->param;
749 X509_VERIFY_PARAM_ID *id = vpm->id;
751 if (id->host && !X509_check_host(x, id->host, id->hostlen,
754 if (!check_id_error(ctx, X509_V_ERR_HOSTNAME_MISMATCH))
757 if (id->email && !X509_check_email(x, id->email, id->emaillen, 0))
759 if (!check_id_error(ctx, X509_V_ERR_EMAIL_MISMATCH))
762 if (id->ip && !X509_check_ip(x, id->ip, id->iplen, 0))
764 if (!check_id_error(ctx, X509_V_ERR_IP_ADDRESS_MISMATCH))
770 static int check_trust(X509_STORE_CTX *ctx)
774 int (*cb)(int xok,X509_STORE_CTX *xctx);
776 /* Check all trusted certificates in chain */
777 for (i = ctx->last_untrusted; i < sk_X509_num(ctx->chain); i++)
779 x = sk_X509_value(ctx->chain, i);
780 ok = X509_check_trust(x, ctx->param->trust, 0);
781 /* If explicitly trusted return trusted */
782 if (ok == X509_TRUST_TRUSTED)
783 return X509_TRUST_TRUSTED;
784 /* If explicitly rejected notify callback and reject if
787 if (ok == X509_TRUST_REJECTED)
789 ctx->error_depth = i;
790 ctx->current_cert = x;
791 ctx->error = X509_V_ERR_CERT_REJECTED;
794 return X509_TRUST_REJECTED;
797 /* If we accept partial chains and have at least one trusted
798 * certificate return success.
800 if (ctx->param->flags & X509_V_FLAG_PARTIAL_CHAIN)
803 if (ctx->last_untrusted < sk_X509_num(ctx->chain))
804 return X509_TRUST_TRUSTED;
805 x = sk_X509_value(ctx->chain, 0);
806 mx = lookup_cert_match(ctx, x);
809 (void)sk_X509_set(ctx->chain, 0, mx);
811 ctx->last_untrusted = 0;
812 return X509_TRUST_TRUSTED;
816 /* If no trusted certs in chain at all return untrusted and
817 * allow standard (no issuer cert) etc errors to be indicated.
819 return X509_TRUST_UNTRUSTED;
822 static int check_revocation(X509_STORE_CTX *ctx)
825 if (!(ctx->param->flags & X509_V_FLAG_CRL_CHECK))
827 if (ctx->param->flags & X509_V_FLAG_CRL_CHECK_ALL)
828 last = sk_X509_num(ctx->chain) - 1;
831 /* If checking CRL paths this isn't the EE certificate */
836 for(i = 0; i <= last; i++)
838 ctx->error_depth = i;
839 ok = check_cert(ctx);
845 static int check_cert(X509_STORE_CTX *ctx)
847 X509_CRL *crl = NULL, *dcrl = NULL;
850 unsigned int last_reasons;
851 cnum = ctx->error_depth;
852 x = sk_X509_value(ctx->chain, cnum);
853 ctx->current_cert = x;
854 ctx->current_issuer = NULL;
855 ctx->current_crl_score = 0;
856 ctx->current_reasons = 0;
857 while (ctx->current_reasons != CRLDP_ALL_REASONS)
859 last_reasons = ctx->current_reasons;
860 /* Try to retrieve relevant CRL */
862 ok = ctx->get_crl(ctx, &crl, x);
864 ok = get_crl_delta(ctx, &crl, &dcrl, x);
865 /* If error looking up CRL, nothing we can do except
870 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
871 ok = ctx->verify_cb(0, ctx);
874 ctx->current_crl = crl;
875 ok = ctx->check_crl(ctx, crl);
881 ok = ctx->check_crl(ctx, dcrl);
884 ok = ctx->cert_crl(ctx, dcrl, x);
891 /* Don't look in full CRL if delta reason is removefromCRL */
894 ok = ctx->cert_crl(ctx, crl, x);
903 /* If reasons not updated we wont get anywhere by
904 * another iteration, so exit loop.
906 if (last_reasons == ctx->current_reasons)
908 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
909 ok = ctx->verify_cb(0, ctx);
917 ctx->current_crl = NULL;
922 /* Check CRL times against values in X509_STORE_CTX */
924 static int check_crl_time(X509_STORE_CTX *ctx, X509_CRL *crl, int notify)
929 ctx->current_crl = crl;
930 if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
931 ptime = &ctx->param->check_time;
935 i=X509_cmp_time(X509_CRL_get_lastUpdate(crl), ptime);
940 ctx->error=X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD;
941 if (!ctx->verify_cb(0, ctx))
949 ctx->error=X509_V_ERR_CRL_NOT_YET_VALID;
950 if (!ctx->verify_cb(0, ctx))
954 if(X509_CRL_get_nextUpdate(crl))
956 i=X509_cmp_time(X509_CRL_get_nextUpdate(crl), ptime);
962 ctx->error=X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD;
963 if (!ctx->verify_cb(0, ctx))
966 /* Ignore expiry of base CRL is delta is valid */
967 if ((i < 0) && !(ctx->current_crl_score & CRL_SCORE_TIME_DELTA))
971 ctx->error=X509_V_ERR_CRL_HAS_EXPIRED;
972 if (!ctx->verify_cb(0, ctx))
978 ctx->current_crl = NULL;
983 static int get_crl_sk(X509_STORE_CTX *ctx, X509_CRL **pcrl, X509_CRL **pdcrl,
984 X509 **pissuer, int *pscore, unsigned int *preasons,
985 STACK_OF(X509_CRL) *crls)
987 int i, crl_score, best_score = *pscore;
988 unsigned int reasons, best_reasons = 0;
989 X509 *x = ctx->current_cert;
990 X509_CRL *crl, *best_crl = NULL;
991 X509 *crl_issuer = NULL, *best_crl_issuer = NULL;
993 for (i = 0; i < sk_X509_CRL_num(crls); i++)
995 crl = sk_X509_CRL_value(crls, i);
997 crl_score = get_crl_score(ctx, &crl_issuer, &reasons, crl, x);
999 if (crl_score > best_score)
1002 best_crl_issuer = crl_issuer;
1003 best_score = crl_score;
1004 best_reasons = reasons;
1011 X509_CRL_free(*pcrl);
1013 *pissuer = best_crl_issuer;
1014 *pscore = best_score;
1015 *preasons = best_reasons;
1016 CRYPTO_add(&best_crl->references, 1, CRYPTO_LOCK_X509_CRL);
1019 X509_CRL_free(*pdcrl);
1022 get_delta_sk(ctx, pdcrl, pscore, best_crl, crls);
1025 if (best_score >= CRL_SCORE_VALID)
1031 /* Compare two CRL extensions for delta checking purposes. They should be
1032 * both present or both absent. If both present all fields must be identical.
1035 static int crl_extension_match(X509_CRL *a, X509_CRL *b, int nid)
1037 ASN1_OCTET_STRING *exta, *extb;
1039 i = X509_CRL_get_ext_by_NID(a, nid, -1);
1042 /* Can't have multiple occurrences */
1043 if (X509_CRL_get_ext_by_NID(a, nid, i) != -1)
1045 exta = X509_EXTENSION_get_data(X509_CRL_get_ext(a, i));
1050 i = X509_CRL_get_ext_by_NID(b, nid, -1);
1055 if (X509_CRL_get_ext_by_NID(b, nid, i) != -1)
1057 extb = X509_EXTENSION_get_data(X509_CRL_get_ext(b, i));
1069 if (ASN1_OCTET_STRING_cmp(exta, extb))
1075 /* See if a base and delta are compatible */
1077 static int check_delta_base(X509_CRL *delta, X509_CRL *base)
1079 /* Delta CRL must be a delta */
1080 if (!delta->base_crl_number)
1082 /* Base must have a CRL number */
1083 if (!base->crl_number)
1085 /* Issuer names must match */
1086 if (X509_NAME_cmp(X509_CRL_get_issuer(base),
1087 X509_CRL_get_issuer(delta)))
1089 /* AKID and IDP must match */
1090 if (!crl_extension_match(delta, base, NID_authority_key_identifier))
1092 if (!crl_extension_match(delta, base, NID_issuing_distribution_point))
1094 /* Delta CRL base number must not exceed Full CRL number. */
1095 if (ASN1_INTEGER_cmp(delta->base_crl_number, base->crl_number) > 0)
1097 /* Delta CRL number must exceed full CRL number */
1098 if (ASN1_INTEGER_cmp(delta->crl_number, base->crl_number) > 0)
1103 /* For a given base CRL find a delta... maybe extend to delta scoring
1104 * or retrieve a chain of deltas...
1107 static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pscore,
1108 X509_CRL *base, STACK_OF(X509_CRL) *crls)
1112 if (!(ctx->param->flags & X509_V_FLAG_USE_DELTAS))
1114 if (!((ctx->current_cert->ex_flags | base->flags) & EXFLAG_FRESHEST))
1116 for (i = 0; i < sk_X509_CRL_num(crls); i++)
1118 delta = sk_X509_CRL_value(crls, i);
1119 if (check_delta_base(delta, base))
1121 if (check_crl_time(ctx, delta, 0))
1122 *pscore |= CRL_SCORE_TIME_DELTA;
1123 CRYPTO_add(&delta->references, 1, CRYPTO_LOCK_X509_CRL);
1131 /* For a given CRL return how suitable it is for the supplied certificate 'x'.
1132 * The return value is a mask of several criteria.
1133 * If the issuer is not the certificate issuer this is returned in *pissuer.
1134 * The reasons mask is also used to determine if the CRL is suitable: if
1135 * no new reasons the CRL is rejected, otherwise reasons is updated.
1138 static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
1139 unsigned int *preasons,
1140 X509_CRL *crl, X509 *x)
1144 unsigned int tmp_reasons = *preasons, crl_reasons;
1146 /* First see if we can reject CRL straight away */
1148 /* Invalid IDP cannot be processed */
1149 if (crl->idp_flags & IDP_INVALID)
1151 /* Reason codes or indirect CRLs need extended CRL support */
1152 if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
1154 if (crl->idp_flags & (IDP_INDIRECT | IDP_REASONS))
1157 else if (crl->idp_flags & IDP_REASONS)
1159 /* If no new reasons reject */
1160 if (!(crl->idp_reasons & ~tmp_reasons))
1163 /* Don't process deltas at this stage */
1164 else if (crl->base_crl_number)
1166 /* If issuer name doesn't match certificate need indirect CRL */
1167 if (X509_NAME_cmp(X509_get_issuer_name(x), X509_CRL_get_issuer(crl)))
1169 if (!(crl->idp_flags & IDP_INDIRECT))
1173 crl_score |= CRL_SCORE_ISSUER_NAME;
1175 if (!(crl->flags & EXFLAG_CRITICAL))
1176 crl_score |= CRL_SCORE_NOCRITICAL;
1179 if (check_crl_time(ctx, crl, 0))
1180 crl_score |= CRL_SCORE_TIME;
1182 /* Check authority key ID and locate certificate issuer */
1183 crl_akid_check(ctx, crl, pissuer, &crl_score);
1185 /* If we can't locate certificate issuer at this point forget it */
1187 if (!(crl_score & CRL_SCORE_AKID))
1190 /* Check cert for matching CRL distribution points */
1192 if (crl_crldp_check(x, crl, crl_score, &crl_reasons))
1194 /* If no new reasons reject */
1195 if (!(crl_reasons & ~tmp_reasons))
1197 tmp_reasons |= crl_reasons;
1198 crl_score |= CRL_SCORE_SCOPE;
1201 *preasons = tmp_reasons;
1207 static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
1208 X509 **pissuer, int *pcrl_score)
1210 X509 *crl_issuer = NULL;
1211 X509_NAME *cnm = X509_CRL_get_issuer(crl);
1212 int cidx = ctx->error_depth;
1215 if (cidx != sk_X509_num(ctx->chain) - 1)
1218 crl_issuer = sk_X509_value(ctx->chain, cidx);
1220 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1222 if (*pcrl_score & CRL_SCORE_ISSUER_NAME)
1224 *pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_ISSUER_CERT;
1225 *pissuer = crl_issuer;
1230 for (cidx++; cidx < sk_X509_num(ctx->chain); cidx++)
1232 crl_issuer = sk_X509_value(ctx->chain, cidx);
1233 if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
1235 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1237 *pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_SAME_PATH;
1238 *pissuer = crl_issuer;
1243 /* Anything else needs extended CRL support */
1245 if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
1248 /* Otherwise the CRL issuer is not on the path. Look for it in the
1249 * set of untrusted certificates.
1251 for (i = 0; i < sk_X509_num(ctx->untrusted); i++)
1253 crl_issuer = sk_X509_value(ctx->untrusted, i);
1254 if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
1256 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1258 *pissuer = crl_issuer;
1259 *pcrl_score |= CRL_SCORE_AKID;
1265 /* Check the path of a CRL issuer certificate. This creates a new
1266 * X509_STORE_CTX and populates it with most of the parameters from the
1267 * parent. This could be optimised somewhat since a lot of path checking
1268 * will be duplicated by the parent, but this will rarely be used in
1272 static int check_crl_path(X509_STORE_CTX *ctx, X509 *x)
1274 X509_STORE_CTX crl_ctx;
1276 /* Don't allow recursive CRL path validation */
1279 if (!X509_STORE_CTX_init(&crl_ctx, ctx->ctx, x, ctx->untrusted))
1282 crl_ctx.crls = ctx->crls;
1283 /* Copy verify params across */
1284 X509_STORE_CTX_set0_param(&crl_ctx, ctx->param);
1286 crl_ctx.parent = ctx;
1287 crl_ctx.verify_cb = ctx->verify_cb;
1289 /* Verify CRL issuer */
1290 ret = X509_verify_cert(&crl_ctx);
1295 /* Check chain is acceptable */
1297 ret = check_crl_chain(ctx, ctx->chain, crl_ctx.chain);
1299 X509_STORE_CTX_cleanup(&crl_ctx);
1303 /* RFC3280 says nothing about the relationship between CRL path
1304 * and certificate path, which could lead to situations where a
1305 * certificate could be revoked or validated by a CA not authorised
1306 * to do so. RFC5280 is more strict and states that the two paths must
1307 * end in the same trust anchor, though some discussions remain...
1308 * until this is resolved we use the RFC5280 version
1311 static int check_crl_chain(X509_STORE_CTX *ctx,
1312 STACK_OF(X509) *cert_path,
1313 STACK_OF(X509) *crl_path)
1315 X509 *cert_ta, *crl_ta;
1316 cert_ta = sk_X509_value(cert_path, sk_X509_num(cert_path) - 1);
1317 crl_ta = sk_X509_value(crl_path, sk_X509_num(crl_path) - 1);
1318 if (!X509_cmp(cert_ta, crl_ta))
1323 /* Check for match between two dist point names: three separate cases.
1324 * 1. Both are relative names and compare X509_NAME types.
1325 * 2. One full, one relative. Compare X509_NAME to GENERAL_NAMES.
1326 * 3. Both are full names and compare two GENERAL_NAMES.
1327 * 4. One is NULL: automatic match.
1331 static int idp_check_dp(DIST_POINT_NAME *a, DIST_POINT_NAME *b)
1333 X509_NAME *nm = NULL;
1334 GENERAL_NAMES *gens = NULL;
1335 GENERAL_NAME *gena, *genb;
1343 /* Case 1: two X509_NAME */
1348 if (!X509_NAME_cmp(a->dpname, b->dpname))
1353 /* Case 2: set name and GENERAL_NAMES appropriately */
1355 gens = b->name.fullname;
1357 else if (b->type == 1)
1361 /* Case 2: set name and GENERAL_NAMES appropriately */
1362 gens = a->name.fullname;
1366 /* Handle case 2 with one GENERAL_NAMES and one X509_NAME */
1369 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
1371 gena = sk_GENERAL_NAME_value(gens, i);
1372 if (gena->type != GEN_DIRNAME)
1374 if (!X509_NAME_cmp(nm, gena->d.directoryName))
1380 /* Else case 3: two GENERAL_NAMES */
1382 for (i = 0; i < sk_GENERAL_NAME_num(a->name.fullname); i++)
1384 gena = sk_GENERAL_NAME_value(a->name.fullname, i);
1385 for (j = 0; j < sk_GENERAL_NAME_num(b->name.fullname); j++)
1387 genb = sk_GENERAL_NAME_value(b->name.fullname, j);
1388 if (!GENERAL_NAME_cmp(gena, genb))
1397 static int crldp_check_crlissuer(DIST_POINT *dp, X509_CRL *crl, int crl_score)
1400 X509_NAME *nm = X509_CRL_get_issuer(crl);
1401 /* If no CRLissuer return is successful iff don't need a match */
1403 return !!(crl_score & CRL_SCORE_ISSUER_NAME);
1404 for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++)
1406 GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
1407 if (gen->type != GEN_DIRNAME)
1409 if (!X509_NAME_cmp(gen->d.directoryName, nm))
1415 /* Check CRLDP and IDP */
1417 static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
1418 unsigned int *preasons)
1421 if (crl->idp_flags & IDP_ONLYATTR)
1423 if (x->ex_flags & EXFLAG_CA)
1425 if (crl->idp_flags & IDP_ONLYUSER)
1430 if (crl->idp_flags & IDP_ONLYCA)
1433 *preasons = crl->idp_reasons;
1434 for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
1436 DIST_POINT *dp = sk_DIST_POINT_value(x->crldp, i);
1437 if (crldp_check_crlissuer(dp, crl, crl_score))
1440 idp_check_dp(dp->distpoint, crl->idp->distpoint))
1442 *preasons &= dp->dp_reasons;
1447 if ((!crl->idp || !crl->idp->distpoint) && (crl_score & CRL_SCORE_ISSUER_NAME))
1452 /* Retrieve CRL corresponding to current certificate.
1453 * If deltas enabled try to find a delta CRL too
1456 static int get_crl_delta(X509_STORE_CTX *ctx,
1457 X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x)
1460 X509 *issuer = NULL;
1462 unsigned int reasons;
1463 X509_CRL *crl = NULL, *dcrl = NULL;
1464 STACK_OF(X509_CRL) *skcrl;
1465 X509_NAME *nm = X509_get_issuer_name(x);
1466 reasons = ctx->current_reasons;
1467 ok = get_crl_sk(ctx, &crl, &dcrl,
1468 &issuer, &crl_score, &reasons, ctx->crls);
1473 /* Lookup CRLs from store */
1475 skcrl = ctx->lookup_crls(ctx, nm);
1477 /* If no CRLs found and a near match from get_crl_sk use that */
1481 get_crl_sk(ctx, &crl, &dcrl, &issuer, &crl_score, &reasons, skcrl);
1483 sk_X509_CRL_pop_free(skcrl, X509_CRL_free);
1487 /* If we got any kind of CRL use it and return success */
1490 ctx->current_issuer = issuer;
1491 ctx->current_crl_score = crl_score;
1492 ctx->current_reasons = reasons;
1501 /* Check CRL validity */
1502 static int check_crl(X509_STORE_CTX *ctx, X509_CRL *crl)
1504 X509 *issuer = NULL;
1505 EVP_PKEY *ikey = NULL;
1506 int ok = 0, chnum, cnum;
1507 cnum = ctx->error_depth;
1508 chnum = sk_X509_num(ctx->chain) - 1;
1509 /* if we have an alternative CRL issuer cert use that */
1510 if (ctx->current_issuer)
1511 issuer = ctx->current_issuer;
1513 /* Else find CRL issuer: if not last certificate then issuer
1514 * is next certificate in chain.
1516 else if (cnum < chnum)
1517 issuer = sk_X509_value(ctx->chain, cnum + 1);
1520 issuer = sk_X509_value(ctx->chain, chnum);
1521 /* If not self signed, can't check signature */
1522 if(!ctx->check_issued(ctx, issuer, issuer))
1524 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER;
1525 ok = ctx->verify_cb(0, ctx);
1532 /* Skip most tests for deltas because they have already
1535 if (!crl->base_crl_number)
1537 /* Check for cRLSign bit if keyUsage present */
1538 if ((issuer->ex_flags & EXFLAG_KUSAGE) &&
1539 !(issuer->ex_kusage & KU_CRL_SIGN))
1541 ctx->error = X509_V_ERR_KEYUSAGE_NO_CRL_SIGN;
1542 ok = ctx->verify_cb(0, ctx);
1546 if (!(ctx->current_crl_score & CRL_SCORE_SCOPE))
1548 ctx->error = X509_V_ERR_DIFFERENT_CRL_SCOPE;
1549 ok = ctx->verify_cb(0, ctx);
1553 if (!(ctx->current_crl_score & CRL_SCORE_SAME_PATH))
1555 if (check_crl_path(ctx, ctx->current_issuer) <= 0)
1557 ctx->error = X509_V_ERR_CRL_PATH_VALIDATION_ERROR;
1558 ok = ctx->verify_cb(0, ctx);
1563 if (crl->idp_flags & IDP_INVALID)
1565 ctx->error = X509_V_ERR_INVALID_EXTENSION;
1566 ok = ctx->verify_cb(0, ctx);
1573 if (!(ctx->current_crl_score & CRL_SCORE_TIME))
1575 ok = check_crl_time(ctx, crl, 1);
1580 /* Attempt to get issuer certificate public key */
1581 ikey = X509_get_pubkey(issuer);
1585 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
1586 ok = ctx->verify_cb(0, ctx);
1592 rv = X509_CRL_check_suiteb(crl, ikey, ctx->param->flags);
1593 if (rv != X509_V_OK)
1596 ok = ctx->verify_cb(0, ctx);
1600 /* Verify CRL signature */
1601 if(X509_CRL_verify(crl, ikey) <= 0)
1603 ctx->error=X509_V_ERR_CRL_SIGNATURE_FAILURE;
1604 ok = ctx->verify_cb(0, ctx);
1613 EVP_PKEY_free(ikey);
1617 /* Check certificate against CRL */
1618 static int cert_crl(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x)
1622 /* The rules changed for this... previously if a CRL contained
1623 * unhandled critical extensions it could still be used to indicate
1624 * a certificate was revoked. This has since been changed since
1625 * critical extension can change the meaning of CRL entries.
1627 if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
1628 && (crl->flags & EXFLAG_CRITICAL))
1630 ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
1631 ok = ctx->verify_cb(0, ctx);
1635 /* Look for serial number of certificate in CRL
1636 * If found make sure reason is not removeFromCRL.
1638 if (X509_CRL_get0_by_cert(crl, &rev, x))
1640 if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
1642 ctx->error = X509_V_ERR_CERT_REVOKED;
1643 ok = ctx->verify_cb(0, ctx);
1651 static int check_policy(X509_STORE_CTX *ctx)
1656 ret = X509_policy_check(&ctx->tree, &ctx->explicit_policy, ctx->chain,
1657 ctx->param->policies, ctx->param->flags);
1660 X509err(X509_F_CHECK_POLICY,ERR_R_MALLOC_FAILURE);
1663 /* Invalid or inconsistent extensions */
1666 /* Locate certificates with bad extensions and notify
1671 for (i = 1; i < sk_X509_num(ctx->chain); i++)
1673 x = sk_X509_value(ctx->chain, i);
1674 if (!(x->ex_flags & EXFLAG_INVALID_POLICY))
1676 ctx->current_cert = x;
1677 ctx->error = X509_V_ERR_INVALID_POLICY_EXTENSION;
1678 if(!ctx->verify_cb(0, ctx))
1685 ctx->current_cert = NULL;
1686 ctx->error = X509_V_ERR_NO_EXPLICIT_POLICY;
1687 return ctx->verify_cb(0, ctx);
1690 if (ctx->param->flags & X509_V_FLAG_NOTIFY_POLICY)
1692 ctx->current_cert = NULL;
1693 ctx->error = X509_V_OK;
1694 if (!ctx->verify_cb(2, ctx))
1701 int x509_check_cert_time(X509_STORE_CTX *ctx, X509 *x, int quiet)
1706 if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
1707 ptime = &ctx->param->check_time;
1711 i=X509_cmp_time(X509_get_notBefore(x), ptime);
1716 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
1717 ctx->current_cert=x;
1718 if (!ctx->verify_cb(0, ctx))
1726 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
1727 ctx->current_cert=x;
1728 if (!ctx->verify_cb(0, ctx))
1732 i=X509_cmp_time(X509_get_notAfter(x), ptime);
1737 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
1738 ctx->current_cert=x;
1739 if (!ctx->verify_cb(0, ctx))
1747 ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
1748 ctx->current_cert=x;
1749 if (!ctx->verify_cb(0, ctx))
1756 static int internal_verify(X509_STORE_CTX *ctx)
1760 EVP_PKEY *pkey=NULL;
1761 int (*cb)(int xok,X509_STORE_CTX *xctx);
1765 n=sk_X509_num(ctx->chain);
1766 ctx->error_depth=n-1;
1768 xi=sk_X509_value(ctx->chain,n);
1770 if (ctx->check_issued(ctx, xi, xi))
1774 if (ctx->param->flags & X509_V_FLAG_PARTIAL_CHAIN)
1781 ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
1782 ctx->current_cert=xi;
1790 xs=sk_X509_value(ctx->chain,n);
1794 /* ctx->error=0; not needed */
1799 /* Skip signature check for self signed certificates unless
1800 * explicitly asked for. It doesn't add any security and
1803 if (!xs->valid && (xs != xi || (ctx->param->flags & X509_V_FLAG_CHECK_SS_SIGNATURE)))
1805 if ((pkey=X509_get_pubkey(xi)) == NULL)
1807 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
1808 ctx->current_cert=xi;
1812 else if (X509_verify(xs,pkey) <= 0)
1814 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
1815 ctx->current_cert=xs;
1819 EVP_PKEY_free(pkey);
1823 EVP_PKEY_free(pkey);
1830 ok = x509_check_cert_time(ctx, xs, 0);
1834 /* The last error (if any) is still in the error value */
1835 ctx->current_issuer=xi;
1836 ctx->current_cert=xs;
1844 xs=sk_X509_value(ctx->chain,n);
1852 int X509_cmp_current_time(const ASN1_TIME *ctm)
1854 return X509_cmp_time(ctm, NULL);
1857 int X509_cmp_time(const ASN1_TIME *ctm, time_t *cmp_time)
1862 char buff1[24],buff2[24],*p;
1867 str=(char *)ctm->data;
1868 if (ctm->type == V_ASN1_UTCTIME)
1870 if ((i < 11) || (i > 17)) return 0;
1877 if (i < 13) return 0;
1883 if ((*str == 'Z') || (*str == '-') || (*str == '+'))
1884 { *(p++)='0'; *(p++)='0'; }
1889 /* Skip any fractional seconds... */
1893 while ((*str >= '0') && (*str <= '9')) str++;
1904 if ((*str != '+') && (*str != '-'))
1906 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
1907 offset+=(str[3]-'0')*10+(str[4]-'0');
1913 atm.length=sizeof(buff2);
1914 atm.data=(unsigned char *)buff2;
1916 if (X509_time_adj(&atm, offset*60, cmp_time) == NULL)
1919 if (ctm->type == V_ASN1_UTCTIME)
1921 i=(buff1[0]-'0')*10+(buff1[1]-'0');
1922 if (i < 50) i+=100; /* cf. RFC 2459 */
1923 j=(buff2[0]-'0')*10+(buff2[1]-'0');
1926 if (i < j) return -1;
1927 if (i > j) return 1;
1929 i=strcmp(buff1,buff2);
1930 if (i == 0) /* wait a second then return younger :-) */
1936 ASN1_TIME *X509_gmtime_adj(ASN1_TIME *s, long adj)
1938 return X509_time_adj(s, adj, NULL);
1941 ASN1_TIME *X509_time_adj(ASN1_TIME *s, long offset_sec, time_t *in_tm)
1943 return X509_time_adj_ex(s, 0, offset_sec, in_tm);
1946 ASN1_TIME *X509_time_adj_ex(ASN1_TIME *s,
1947 int offset_day, long offset_sec, time_t *in_tm)
1951 if (in_tm) t = *in_tm;
1954 if (s && !(s->flags & ASN1_STRING_FLAG_MSTRING))
1956 if (s->type == V_ASN1_UTCTIME)
1957 return ASN1_UTCTIME_adj(s,t, offset_day, offset_sec);
1958 if (s->type == V_ASN1_GENERALIZEDTIME)
1959 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day,
1962 return ASN1_TIME_adj(s, t, offset_day, offset_sec);
1965 int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
1967 EVP_PKEY *ktmp=NULL,*ktmp2;
1970 if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return 1;
1972 for (i=0; i<sk_X509_num(chain); i++)
1974 ktmp=X509_get_pubkey(sk_X509_value(chain,i));
1977 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
1980 if (!EVP_PKEY_missing_parameters(ktmp))
1984 EVP_PKEY_free(ktmp);
1990 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
1994 /* first, populate the other certs */
1995 for (j=i-1; j >= 0; j--)
1997 ktmp2=X509_get_pubkey(sk_X509_value(chain,j));
1998 EVP_PKEY_copy_parameters(ktmp2,ktmp);
1999 EVP_PKEY_free(ktmp2);
2002 if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
2003 EVP_PKEY_free(ktmp);
2007 /* Make a delta CRL as the diff between two full CRLs */
2009 X509_CRL *X509_CRL_diff(X509_CRL *base, X509_CRL *newer,
2010 EVP_PKEY *skey, const EVP_MD *md, unsigned int flags)
2012 X509_CRL *crl = NULL;
2014 STACK_OF(X509_REVOKED) *revs = NULL;
2015 /* CRLs can't be delta already */
2016 if (base->base_crl_number || newer->base_crl_number)
2018 X509err(X509_F_X509_CRL_DIFF, X509_R_CRL_ALREADY_DELTA);
2021 /* Base and new CRL must have a CRL number */
2022 if (!base->crl_number || !newer->crl_number)
2024 X509err(X509_F_X509_CRL_DIFF, X509_R_NO_CRL_NUMBER);
2027 /* Issuer names must match */
2028 if (X509_NAME_cmp(X509_CRL_get_issuer(base),
2029 X509_CRL_get_issuer(newer)))
2031 X509err(X509_F_X509_CRL_DIFF, X509_R_ISSUER_MISMATCH);
2034 /* AKID and IDP must match */
2035 if (!crl_extension_match(base, newer, NID_authority_key_identifier))
2037 X509err(X509_F_X509_CRL_DIFF, X509_R_AKID_MISMATCH);
2040 if (!crl_extension_match(base, newer, NID_issuing_distribution_point))
2042 X509err(X509_F_X509_CRL_DIFF, X509_R_IDP_MISMATCH);
2045 /* Newer CRL number must exceed full CRL number */
2046 if (ASN1_INTEGER_cmp(newer->crl_number, base->crl_number) <= 0)
2048 X509err(X509_F_X509_CRL_DIFF, X509_R_NEWER_CRL_NOT_NEWER);
2051 /* CRLs must verify */
2052 if (skey && (X509_CRL_verify(base, skey) <= 0 ||
2053 X509_CRL_verify(newer, skey) <= 0))
2055 X509err(X509_F_X509_CRL_DIFF, X509_R_CRL_VERIFY_FAILURE);
2058 /* Create new CRL */
2059 crl = X509_CRL_new();
2060 if (!crl || !X509_CRL_set_version(crl, 1))
2062 /* Set issuer name */
2063 if (!X509_CRL_set_issuer_name(crl, X509_CRL_get_issuer(newer)))
2066 if (!X509_CRL_set_lastUpdate(crl, X509_CRL_get_lastUpdate(newer)))
2068 if (!X509_CRL_set_nextUpdate(crl, X509_CRL_get_nextUpdate(newer)))
2071 /* Set base CRL number: must be critical */
2073 if (!X509_CRL_add1_ext_i2d(crl, NID_delta_crl, base->crl_number, 1, 0))
2076 /* Copy extensions across from newest CRL to delta: this will set
2077 * CRL number to correct value too.
2080 for (i = 0; i < X509_CRL_get_ext_count(newer); i++)
2082 X509_EXTENSION *ext;
2083 ext = X509_CRL_get_ext(newer, i);
2084 if (!X509_CRL_add_ext(crl, ext, -1))
2088 /* Go through revoked entries, copying as needed */
2090 revs = X509_CRL_get_REVOKED(newer);
2092 for (i = 0; i < sk_X509_REVOKED_num(revs); i++)
2094 X509_REVOKED *rvn, *rvtmp;
2095 rvn = sk_X509_REVOKED_value(revs, i);
2096 /* Add only if not also in base.
2097 * TODO: need something cleverer here for some more complex
2098 * CRLs covering multiple CAs.
2100 if (!X509_CRL_get0_by_serial(base, &rvtmp, rvn->serialNumber))
2102 rvtmp = X509_REVOKED_dup(rvn);
2105 if (!X509_CRL_add0_revoked(crl, rvtmp))
2107 X509_REVOKED_free(rvtmp);
2112 /* TODO: optionally prune deleted entries */
2114 if (skey && md && !X509_CRL_sign(crl, skey, md))
2120 X509err(X509_F_X509_CRL_DIFF, ERR_R_MALLOC_FAILURE);
2126 int X509_STORE_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
2127 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
2129 /* This function is (usually) called only once, by
2130 * SSL_get_ex_data_X509_STORE_CTX_idx (ssl/ssl_cert.c). */
2131 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509_STORE_CTX, argl, argp,
2132 new_func, dup_func, free_func);
2135 int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
2137 return CRYPTO_set_ex_data(&ctx->ex_data,idx,data);
2140 void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
2142 return CRYPTO_get_ex_data(&ctx->ex_data,idx);
2145 int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
2150 void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
2155 int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
2157 return ctx->error_depth;
2160 X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
2162 return ctx->current_cert;
2165 STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
2170 STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx)
2174 return X509_chain_up_ref(ctx->chain);
2177 X509 *X509_STORE_CTX_get0_current_issuer(X509_STORE_CTX *ctx)
2179 return ctx->current_issuer;
2182 X509_CRL *X509_STORE_CTX_get0_current_crl(X509_STORE_CTX *ctx)
2184 return ctx->current_crl;
2187 X509_STORE_CTX *X509_STORE_CTX_get0_parent_ctx(X509_STORE_CTX *ctx)
2192 void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
2197 void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
2202 void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk)
2207 int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose)
2209 return X509_STORE_CTX_purpose_inherit(ctx, 0, purpose, 0);
2212 int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust)
2214 return X509_STORE_CTX_purpose_inherit(ctx, 0, 0, trust);
2217 /* This function is used to set the X509_STORE_CTX purpose and trust
2218 * values. This is intended to be used when another structure has its
2219 * own trust and purpose values which (if set) will be inherited by
2220 * the ctx. If they aren't set then we will usually have a default
2221 * purpose in mind which should then be used to set the trust value.
2222 * An example of this is SSL use: an SSL structure will have its own
2223 * purpose and trust settings which the application can set: if they
2224 * aren't set then we use the default of SSL client/server.
2227 int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
2228 int purpose, int trust)
2231 /* If purpose not set use default */
2232 if (!purpose) purpose = def_purpose;
2233 /* If we have a purpose then check it is valid */
2237 idx = X509_PURPOSE_get_by_id(purpose);
2240 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
2241 X509_R_UNKNOWN_PURPOSE_ID);
2244 ptmp = X509_PURPOSE_get0(idx);
2245 if (ptmp->trust == X509_TRUST_DEFAULT)
2247 idx = X509_PURPOSE_get_by_id(def_purpose);
2250 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
2251 X509_R_UNKNOWN_PURPOSE_ID);
2254 ptmp = X509_PURPOSE_get0(idx);
2256 /* If trust not set then get from purpose default */
2257 if (!trust) trust = ptmp->trust;
2261 idx = X509_TRUST_get_by_id(trust);
2264 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
2265 X509_R_UNKNOWN_TRUST_ID);
2270 if (purpose && !ctx->param->purpose) ctx->param->purpose = purpose;
2271 if (trust && !ctx->param->trust) ctx->param->trust = trust;
2275 X509_STORE_CTX *X509_STORE_CTX_new(void)
2277 X509_STORE_CTX *ctx;
2278 ctx = (X509_STORE_CTX *)OPENSSL_malloc(sizeof(X509_STORE_CTX));
2281 X509err(X509_F_X509_STORE_CTX_NEW,ERR_R_MALLOC_FAILURE);
2284 memset(ctx, 0, sizeof(X509_STORE_CTX));
2288 void X509_STORE_CTX_free(X509_STORE_CTX *ctx)
2290 X509_STORE_CTX_cleanup(ctx);
2294 int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
2295 STACK_OF(X509) *chain)
2299 ctx->current_method=0;
2301 ctx->untrusted=chain;
2303 ctx->last_untrusted=0;
2304 ctx->other_ctx=NULL;
2308 ctx->explicit_policy=0;
2310 ctx->current_cert=NULL;
2311 ctx->current_issuer=NULL;
2312 ctx->current_crl=NULL;
2313 ctx->current_crl_score=0;
2314 ctx->current_reasons=0;
2318 ctx->param = X509_VERIFY_PARAM_new();
2322 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2326 /* Inherit callbacks and flags from X509_STORE if not set
2332 ret = X509_VERIFY_PARAM_inherit(ctx->param, store->param);
2334 ctx->param->inh_flags |= X509_VP_FLAG_DEFAULT|X509_VP_FLAG_ONCE;
2338 ctx->verify_cb = store->verify_cb;
2339 ctx->cleanup = store->cleanup;
2345 ret = X509_VERIFY_PARAM_inherit(ctx->param,
2346 X509_VERIFY_PARAM_lookup("default"));
2350 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2354 if (store && store->check_issued)
2355 ctx->check_issued = store->check_issued;
2357 ctx->check_issued = check_issued;
2359 if (store && store->get_issuer)
2360 ctx->get_issuer = store->get_issuer;
2362 ctx->get_issuer = X509_STORE_CTX_get1_issuer;
2364 if (store && store->verify_cb)
2365 ctx->verify_cb = store->verify_cb;
2367 ctx->verify_cb = null_callback;
2369 if (store && store->verify)
2370 ctx->verify = store->verify;
2372 ctx->verify = internal_verify;
2374 if (store && store->check_revocation)
2375 ctx->check_revocation = store->check_revocation;
2377 ctx->check_revocation = check_revocation;
2379 if (store && store->get_crl)
2380 ctx->get_crl = store->get_crl;
2382 ctx->get_crl = NULL;
2384 if (store && store->check_crl)
2385 ctx->check_crl = store->check_crl;
2387 ctx->check_crl = check_crl;
2389 if (store && store->cert_crl)
2390 ctx->cert_crl = store->cert_crl;
2392 ctx->cert_crl = cert_crl;
2394 if (store && store->lookup_certs)
2395 ctx->lookup_certs = store->lookup_certs;
2397 ctx->lookup_certs = X509_STORE_get1_certs;
2399 if (store && store->lookup_crls)
2400 ctx->lookup_crls = store->lookup_crls;
2402 ctx->lookup_crls = X509_STORE_get1_crls;
2404 ctx->check_policy = check_policy;
2407 /* This memset() can't make any sense anyway, so it's removed. As
2408 * X509_STORE_CTX_cleanup does a proper "free" on the ex_data, we put a
2409 * corresponding "new" here and remove this bogus initialisation. */
2410 /* memset(&(ctx->ex_data),0,sizeof(CRYPTO_EX_DATA)); */
2411 if(!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx,
2415 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2421 /* Set alternative lookup method: just a STACK of trusted certificates.
2422 * This avoids X509_STORE nastiness where it isn't needed.
2425 void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
2427 ctx->other_ctx = sk;
2428 ctx->get_issuer = get_issuer_sk;
2431 void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx)
2433 if (ctx->cleanup) ctx->cleanup(ctx);
2434 if (ctx->param != NULL)
2436 if (ctx->parent == NULL)
2437 X509_VERIFY_PARAM_free(ctx->param);
2440 if (ctx->tree != NULL)
2442 X509_policy_tree_free(ctx->tree);
2445 if (ctx->chain != NULL)
2447 sk_X509_pop_free(ctx->chain,X509_free);
2450 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx, &(ctx->ex_data));
2451 memset(&ctx->ex_data,0,sizeof(CRYPTO_EX_DATA));
2454 void X509_STORE_CTX_set_depth(X509_STORE_CTX *ctx, int depth)
2456 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2459 void X509_STORE_CTX_set_flags(X509_STORE_CTX *ctx, unsigned long flags)
2461 X509_VERIFY_PARAM_set_flags(ctx->param, flags);
2464 void X509_STORE_CTX_set_time(X509_STORE_CTX *ctx, unsigned long flags, time_t t)
2466 X509_VERIFY_PARAM_set_time(ctx->param, t);
2469 void X509_STORE_CTX_set_verify_cb(X509_STORE_CTX *ctx,
2470 int (*verify_cb)(int, X509_STORE_CTX *))
2472 ctx->verify_cb=verify_cb;
2475 X509_POLICY_TREE *X509_STORE_CTX_get0_policy_tree(X509_STORE_CTX *ctx)
2480 int X509_STORE_CTX_get_explicit_policy(X509_STORE_CTX *ctx)
2482 return ctx->explicit_policy;
2485 int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name)
2487 const X509_VERIFY_PARAM *param;
2488 param = X509_VERIFY_PARAM_lookup(name);
2491 return X509_VERIFY_PARAM_inherit(ctx->param, param);
2494 X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx)
2499 void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param)
2502 X509_VERIFY_PARAM_free(ctx->param);
2506 IMPLEMENT_STACK_OF(X509)
2507 IMPLEMENT_ASN1_SET_OF(X509)
2509 IMPLEMENT_STACK_OF(X509_NAME)
2511 IMPLEMENT_STACK_OF(X509_ATTRIBUTE)
2512 IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE)