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_trust(X509_STORE_CTX *ctx);
117 static int check_revocation(X509_STORE_CTX *ctx);
118 static int check_cert(X509_STORE_CTX *ctx);
119 static int check_policy(X509_STORE_CTX *ctx);
121 static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
122 unsigned int *preasons,
123 X509_CRL *crl, X509 *x);
124 static int get_crl_delta(X509_STORE_CTX *ctx,
125 X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x);
126 static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pcrl_score,
127 X509_CRL *base, STACK_OF(X509_CRL) *crls);
128 static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
129 X509 **pissuer, int *pcrl_score);
130 static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
131 unsigned int *preasons);
132 static int check_crl_path(X509_STORE_CTX *ctx, X509 *x);
133 static int check_crl_chain(X509_STORE_CTX *ctx,
134 STACK_OF(X509) *cert_path,
135 STACK_OF(X509) *crl_path);
137 static int internal_verify(X509_STORE_CTX *ctx);
138 const char X509_version[]="X.509" OPENSSL_VERSION_PTEXT;
141 static int null_callback(int ok, X509_STORE_CTX *e)
147 static int x509_subject_cmp(X509 **a, X509 **b)
149 return X509_subject_name_cmp(*a,*b);
153 int X509_verify_cert(X509_STORE_CTX *ctx)
155 X509 *x,*xtmp,*chain_ss=NULL;
157 X509_VERIFY_PARAM *param = ctx->param;
160 int (*cb)(int xok,X509_STORE_CTX *xctx);
161 STACK_OF(X509) *sktmp=NULL;
162 if (ctx->cert == NULL)
164 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
170 /* first we make sure the chain we are going to build is
171 * present and that the first entry is in place */
172 if (ctx->chain == NULL)
174 if ( ((ctx->chain=sk_X509_new_null()) == NULL) ||
175 (!sk_X509_push(ctx->chain,ctx->cert)))
177 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
180 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
181 ctx->last_untrusted=1;
184 /* We use a temporary STACK so we can chop and hack at it */
185 if (ctx->untrusted != NULL
186 && (sktmp=sk_X509_dup(ctx->untrusted)) == NULL)
188 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
192 num=sk_X509_num(ctx->chain);
193 x=sk_X509_value(ctx->chain,num-1);
199 /* If we have enough, we break */
200 if (depth < num) break; /* FIXME: If this happens, we should take
201 * note of it and, if appropriate, use the
202 * X509_V_ERR_CERT_CHAIN_TOO_LONG error
206 /* If we are self signed, we break */
207 if (ctx->check_issued(ctx, x,x)) break;
209 /* If we were passed a cert chain, use it first */
210 if (ctx->untrusted != NULL)
212 xtmp=find_issuer(ctx, sktmp,x);
215 if (!sk_X509_push(ctx->chain,xtmp))
217 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
220 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
221 (void)sk_X509_delete_ptr(sktmp,xtmp);
222 ctx->last_untrusted++;
225 /* reparse the full chain for
233 /* at this point, chain should contain a list of untrusted
234 * certificates. We now need to add at least one trusted one,
235 * if possible, otherwise we complain. */
237 /* Examine last certificate in chain and see if it
241 i=sk_X509_num(ctx->chain);
242 x=sk_X509_value(ctx->chain,i-1);
243 if (ctx->check_issued(ctx, x, x))
245 /* we have a self signed certificate */
246 if (sk_X509_num(ctx->chain) == 1)
248 /* We have a single self signed certificate: see if
249 * we can find it in the store. We must have an exact
250 * match to avoid possible impersonation.
252 ok = ctx->get_issuer(&xtmp, ctx, x);
253 if ((ok <= 0) || X509_cmp(x, xtmp))
255 ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
257 ctx->error_depth=i-1;
258 if (ok == 1) X509_free(xtmp);
265 /* We have a match: replace certificate with store version
266 * so we get any trust settings.
270 (void)sk_X509_set(ctx->chain, i - 1, x);
271 ctx->last_untrusted=0;
276 /* extract and save self signed certificate for later use */
277 chain_ss=sk_X509_pop(ctx->chain);
278 ctx->last_untrusted--;
280 x=sk_X509_value(ctx->chain,num-1);
284 /* We now lookup certs from the certificate store */
287 /* If we have enough, we break */
288 if (depth < num) break;
290 /* If we are self signed, we break */
291 if (ctx->check_issued(ctx,x,x)) break;
293 ok = ctx->get_issuer(&xtmp, ctx, x);
295 if (ok < 0) return ok;
299 if (!sk_X509_push(ctx->chain,x))
302 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
308 /* we now have our chain, lets check it... */
310 /* Is last certificate looked up self signed? */
311 if (!ctx->check_issued(ctx,x,x))
313 if ((chain_ss == NULL) || !ctx->check_issued(ctx, x, chain_ss))
315 if (ctx->last_untrusted >= num)
316 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
318 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
324 sk_X509_push(ctx->chain,chain_ss);
326 ctx->last_untrusted=num;
327 ctx->current_cert=chain_ss;
328 ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
332 ctx->error_depth=num-1;
338 /* We have the chain complete: now we need to check its purpose */
339 ok = check_chain_extensions(ctx);
343 /* Check name constraints */
345 ok = check_name_constraints(ctx);
349 /* The chain extensions are OK: check trust */
351 if (param->trust > 0) ok = check_trust(ctx);
355 /* We may as well copy down any DSA parameters that are required */
356 X509_get_pubkey_parameters(NULL,ctx->chain);
358 /* Check revocation status: we do this after copying parameters
359 * because they may be needed for CRL signature verification.
362 ok = ctx->check_revocation(ctx);
365 /* At this point, we have a chain and need to verify it */
366 if (ctx->verify != NULL)
369 ok=internal_verify(ctx);
372 #ifndef OPENSSL_NO_RFC3779
373 /* RFC 3779 path validation, now that CRL check has been done */
374 ok = v3_asid_validate_path(ctx);
376 ok = v3_addr_validate_path(ctx);
380 /* If we get this far evaluate policies */
381 if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK))
382 ok = ctx->check_policy(ctx);
387 X509_get_pubkey_parameters(NULL,ctx->chain);
389 if (sktmp != NULL) sk_X509_free(sktmp);
390 if (chain_ss != NULL) X509_free(chain_ss);
395 /* Given a STACK_OF(X509) find the issuer of cert (if any)
398 static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x)
402 for (i = 0; i < sk_X509_num(sk); i++)
404 issuer = sk_X509_value(sk, i);
405 if (ctx->check_issued(ctx, x, issuer))
411 /* Given a possible certificate and issuer check them */
413 static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer)
416 ret = X509_check_issued(issuer, x);
417 if (ret == X509_V_OK)
419 /* If we haven't asked for issuer errors don't set ctx */
420 if (!(ctx->param->flags & X509_V_FLAG_CB_ISSUER_CHECK))
424 ctx->current_cert = x;
425 ctx->current_issuer = issuer;
426 return ctx->verify_cb(0, ctx);
430 /* Alternative lookup method: look from a STACK stored in other_ctx */
432 static int get_issuer_sk(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
434 *issuer = find_issuer(ctx, ctx->other_ctx, x);
437 CRYPTO_add(&(*issuer)->references,1,CRYPTO_LOCK_X509);
445 /* Check a certificate chains extensions for consistency
446 * with the supplied purpose
449 static int check_chain_extensions(X509_STORE_CTX *ctx)
451 #ifdef OPENSSL_NO_CHAIN_VERIFY
454 int i, ok=0, must_be_ca, plen = 0;
456 int (*cb)(int xok,X509_STORE_CTX *xctx);
457 int proxy_path_length = 0;
459 int allow_proxy_certs;
462 /* must_be_ca can have 1 of 3 values:
463 -1: we accept both CA and non-CA certificates, to allow direct
464 use of self-signed certificates (which are marked as CA).
465 0: we only accept non-CA certificates. This is currently not
466 used, but the possibility is present for future extensions.
467 1: we only accept CA certificates. This is currently used for
468 all certificates in the chain except the leaf certificate.
472 /* CRL path validation */
475 allow_proxy_certs = 0;
476 purpose = X509_PURPOSE_CRL_SIGN;
481 !!(ctx->param->flags & X509_V_FLAG_ALLOW_PROXY_CERTS);
482 /* A hack to keep people who don't want to modify their
484 if (getenv("OPENSSL_ALLOW_PROXY_CERTS"))
485 allow_proxy_certs = 1;
486 purpose = ctx->param->purpose;
489 /* Check all untrusted certificates */
490 for (i = 0; i < ctx->last_untrusted; i++)
493 x = sk_X509_value(ctx->chain, i);
494 if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
495 && (x->ex_flags & EXFLAG_CRITICAL))
497 ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION;
498 ctx->error_depth = i;
499 ctx->current_cert = x;
503 if (!allow_proxy_certs && (x->ex_flags & EXFLAG_PROXY))
505 ctx->error = X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED;
506 ctx->error_depth = i;
507 ctx->current_cert = x;
511 ret = X509_check_ca(x);
515 if ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
516 && (ret != 1) && (ret != 0))
519 ctx->error = X509_V_ERR_INVALID_CA;
528 ctx->error = X509_V_ERR_INVALID_NON_CA;
535 || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
539 ctx->error = X509_V_ERR_INVALID_CA;
547 ctx->error_depth = i;
548 ctx->current_cert = x;
552 if (ctx->param->purpose > 0)
554 ret = X509_check_purpose(x, purpose, must_be_ca > 0);
556 || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
559 ctx->error = X509_V_ERR_INVALID_PURPOSE;
560 ctx->error_depth = i;
561 ctx->current_cert = x;
566 /* Check pathlen if not self issued */
567 if ((i > 1) && !(x->ex_flags & EXFLAG_SI)
568 && (x->ex_pathlen != -1)
569 && (plen > (x->ex_pathlen + proxy_path_length + 1)))
571 ctx->error = X509_V_ERR_PATH_LENGTH_EXCEEDED;
572 ctx->error_depth = i;
573 ctx->current_cert = x;
577 /* Increment path length if not self issued */
578 if (!(x->ex_flags & EXFLAG_SI))
580 /* If this certificate is a proxy certificate, the next
581 certificate must be another proxy certificate or a EE
582 certificate. If not, the next certificate must be a
584 if (x->ex_flags & EXFLAG_PROXY)
586 if (x->ex_pcpathlen != -1 && i > x->ex_pcpathlen)
589 X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
590 ctx->error_depth = i;
591 ctx->current_cert = x;
607 static int check_name_constraints(X509_STORE_CTX *ctx)
611 /* Check name constraints for all certificates */
612 for (i = sk_X509_num(ctx->chain) - 1; i >= 0; i--)
614 x = sk_X509_value(ctx->chain, i);
615 /* Ignore self issued certs unless last in chain */
616 if (i && (x->ex_flags & EXFLAG_SI))
618 /* Check against constraints for all certificates higher in
619 * chain including trust anchor. Trust anchor not strictly
620 * speaking needed but if it includes constraints it is to be
621 * assumed it expects them to be obeyed.
623 for (j = sk_X509_num(ctx->chain) - 1; j > i; j--)
625 NAME_CONSTRAINTS *nc = sk_X509_value(ctx->chain, j)->nc;
628 rv = NAME_CONSTRAINTS_check(x, nc);
632 ctx->error_depth = i;
633 ctx->current_cert = x;
634 if (!ctx->verify_cb(0,ctx))
643 static int check_trust(X509_STORE_CTX *ctx)
645 #ifdef OPENSSL_NO_CHAIN_VERIFY
650 int (*cb)(int xok,X509_STORE_CTX *xctx);
652 /* For now just check the last certificate in the chain */
653 i = sk_X509_num(ctx->chain) - 1;
654 x = sk_X509_value(ctx->chain, i);
655 ok = X509_check_trust(x, ctx->param->trust, 0);
656 if (ok == X509_TRUST_TRUSTED)
658 ctx->error_depth = i;
659 ctx->current_cert = x;
660 if (ok == X509_TRUST_REJECTED)
661 ctx->error = X509_V_ERR_CERT_REJECTED;
663 ctx->error = X509_V_ERR_CERT_UNTRUSTED;
669 static int check_revocation(X509_STORE_CTX *ctx)
672 if (!(ctx->param->flags & X509_V_FLAG_CRL_CHECK))
674 if (ctx->param->flags & X509_V_FLAG_CRL_CHECK_ALL)
675 last = sk_X509_num(ctx->chain) - 1;
678 /* If checking CRL paths this isn't the EE certificate */
683 for(i = 0; i <= last; i++)
685 ctx->error_depth = i;
686 ok = check_cert(ctx);
692 static int check_cert(X509_STORE_CTX *ctx)
694 X509_CRL *crl = NULL, *dcrl = NULL;
697 unsigned int last_reasons;
698 cnum = ctx->error_depth;
699 x = sk_X509_value(ctx->chain, cnum);
700 ctx->current_cert = x;
701 ctx->current_issuer = NULL;
702 ctx->current_crl_score = 0;
703 ctx->current_reasons = 0;
704 while (ctx->current_reasons != CRLDP_ALL_REASONS)
706 last_reasons = ctx->current_reasons;
707 /* Try to retrieve relevant CRL */
709 ok = ctx->get_crl(ctx, &crl, x);
711 ok = get_crl_delta(ctx, &crl, &dcrl, x);
712 /* If error looking up CRL, nothing we can do except
717 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
718 ok = ctx->verify_cb(0, ctx);
721 ctx->current_crl = crl;
722 ok = ctx->check_crl(ctx, crl);
728 ok = ctx->check_crl(ctx, dcrl);
731 ok = ctx->cert_crl(ctx, dcrl, x);
738 /* Don't look in full CRL if delta reason is removefromCRL */
741 ok = ctx->cert_crl(ctx, crl, x);
750 /* If reasons not updated we wont get anywhere by
751 * another iteration, so exit loop.
753 if (last_reasons == ctx->current_reasons)
755 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
756 ok = ctx->verify_cb(0, ctx);
764 ctx->current_crl = NULL;
769 /* Check CRL times against values in X509_STORE_CTX */
771 static int check_crl_time(X509_STORE_CTX *ctx, X509_CRL *crl, int notify)
776 ctx->current_crl = crl;
777 if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
778 ptime = &ctx->param->check_time;
782 i=X509_cmp_time(X509_CRL_get_lastUpdate(crl), ptime);
787 ctx->error=X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD;
788 if (!ctx->verify_cb(0, ctx))
796 ctx->error=X509_V_ERR_CRL_NOT_YET_VALID;
797 if (!ctx->verify_cb(0, ctx))
801 if(X509_CRL_get_nextUpdate(crl))
803 i=X509_cmp_time(X509_CRL_get_nextUpdate(crl), ptime);
809 ctx->error=X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD;
810 if (!ctx->verify_cb(0, ctx))
813 /* Ignore expiry of base CRL is delta is valid */
814 if ((i < 0) && !(ctx->current_crl_score & CRL_SCORE_TIME_DELTA))
818 ctx->error=X509_V_ERR_CRL_HAS_EXPIRED;
819 if (!ctx->verify_cb(0, ctx))
825 ctx->current_crl = NULL;
830 static int get_crl_sk(X509_STORE_CTX *ctx, X509_CRL **pcrl, X509_CRL **pdcrl,
831 X509 **pissuer, int *pscore, unsigned int *preasons,
832 STACK_OF(X509_CRL) *crls)
834 int i, crl_score, best_score = *pscore;
835 unsigned int reasons, best_reasons = 0;
836 X509 *x = ctx->current_cert;
837 X509_CRL *crl, *best_crl = NULL;
838 X509 *crl_issuer = NULL, *best_crl_issuer = NULL;
840 for (i = 0; i < sk_X509_CRL_num(crls); i++)
842 crl = sk_X509_CRL_value(crls, i);
844 crl_score = get_crl_score(ctx, &crl_issuer, &reasons, crl, x);
846 if (crl_score > best_score)
849 best_crl_issuer = crl_issuer;
850 best_score = crl_score;
851 best_reasons = reasons;
858 X509_CRL_free(*pcrl);
860 *pissuer = best_crl_issuer;
861 *pscore = best_score;
862 *preasons = best_reasons;
863 CRYPTO_add(&best_crl->references, 1, CRYPTO_LOCK_X509_CRL);
866 X509_CRL_free(*pdcrl);
869 get_delta_sk(ctx, pdcrl, pscore, best_crl, crls);
872 if (best_score >= CRL_SCORE_VALID)
878 /* Compare two CRL extensions for delta checking purposes. They should be
879 * both present or both absent. If both present all fields must be identical.
882 static int crl_extension_match(X509_CRL *a, X509_CRL *b, int nid)
884 ASN1_OCTET_STRING *exta, *extb;
886 i = X509_CRL_get_ext_by_NID(a, nid, -1);
889 /* Can't have multiple occurrences */
890 if (X509_CRL_get_ext_by_NID(a, nid, i) != -1)
892 exta = X509_EXTENSION_get_data(X509_CRL_get_ext(a, i));
897 i = X509_CRL_get_ext_by_NID(b, nid, -1);
902 if (X509_CRL_get_ext_by_NID(b, nid, i) != -1)
904 extb = X509_EXTENSION_get_data(X509_CRL_get_ext(b, i));
916 if (ASN1_OCTET_STRING_cmp(exta, extb))
922 /* See if a base and delta are compatible */
924 static int check_delta_base(X509_CRL *delta, X509_CRL *base)
926 /* Delta CRL must be a delta */
927 if (!delta->base_crl_number)
929 /* Base must have a CRL number */
930 if (!base->crl_number)
932 /* Issuer names must match */
933 if (X509_NAME_cmp(X509_CRL_get_issuer(base),
934 X509_CRL_get_issuer(delta)))
936 /* AKID and IDP must match */
937 if (!crl_extension_match(delta, base, NID_authority_key_identifier))
939 if (!crl_extension_match(delta, base, NID_issuing_distribution_point))
941 /* Delta CRL base number must not exceed Full CRL number. */
942 if (ASN1_INTEGER_cmp(delta->base_crl_number, base->crl_number) > 0)
944 /* Delta CRL number must exceed full CRL number */
945 if (ASN1_INTEGER_cmp(delta->crl_number, base->crl_number) > 0)
950 /* For a given base CRL find a delta... maybe extend to delta scoring
951 * or retrieve a chain of deltas...
954 static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pscore,
955 X509_CRL *base, STACK_OF(X509_CRL) *crls)
959 if (!(ctx->param->flags & X509_V_FLAG_USE_DELTAS))
961 if (!((ctx->current_cert->ex_flags | base->flags) & EXFLAG_FRESHEST))
963 for (i = 0; i < sk_X509_CRL_num(crls); i++)
965 delta = sk_X509_CRL_value(crls, i);
966 if (check_delta_base(delta, base))
968 if (check_crl_time(ctx, delta, 0))
969 *pscore |= CRL_SCORE_TIME_DELTA;
970 CRYPTO_add(&delta->references, 1, CRYPTO_LOCK_X509_CRL);
978 /* For a given CRL return how suitable it is for the supplied certificate 'x'.
979 * The return value is a mask of several criteria.
980 * If the issuer is not the certificate issuer this is returned in *pissuer.
981 * The reasons mask is also used to determine if the CRL is suitable: if
982 * no new reasons the CRL is rejected, otherwise reasons is updated.
985 static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
986 unsigned int *preasons,
987 X509_CRL *crl, X509 *x)
991 unsigned int tmp_reasons = *preasons, crl_reasons;
993 /* First see if we can reject CRL straight away */
995 /* Invalid IDP cannot be processed */
996 if (crl->idp_flags & IDP_INVALID)
998 /* Reason codes or indirect CRLs need extended CRL support */
999 if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
1001 if (crl->idp_flags & (IDP_INDIRECT | IDP_REASONS))
1004 else if (crl->idp_flags & IDP_REASONS)
1006 /* If no new reasons reject */
1007 if (!(crl->idp_reasons & ~tmp_reasons))
1010 /* Don't process deltas at this stage */
1011 else if (crl->base_crl_number)
1013 /* If issuer name doesn't match certificate need indirect CRL */
1014 if (X509_NAME_cmp(X509_get_issuer_name(x), X509_CRL_get_issuer(crl)))
1016 if (!(crl->idp_flags & IDP_INDIRECT))
1020 crl_score |= CRL_SCORE_ISSUER_NAME;
1022 if (!(crl->flags & EXFLAG_CRITICAL))
1023 crl_score |= CRL_SCORE_NOCRITICAL;
1026 if (check_crl_time(ctx, crl, 0))
1027 crl_score |= CRL_SCORE_TIME;
1029 /* Check authority key ID and locate certificate issuer */
1030 crl_akid_check(ctx, crl, pissuer, &crl_score);
1032 /* If we can't locate certificate issuer at this point forget it */
1034 if (!(crl_score & CRL_SCORE_AKID))
1037 /* Check cert for matching CRL distribution points */
1039 if (crl_crldp_check(x, crl, crl_score, &crl_reasons))
1041 /* If no new reasons reject */
1042 if (!(crl_reasons & ~tmp_reasons))
1044 tmp_reasons |= crl_reasons;
1045 crl_score |= CRL_SCORE_SCOPE;
1048 *preasons = tmp_reasons;
1054 static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
1055 X509 **pissuer, int *pcrl_score)
1057 X509 *crl_issuer = NULL;
1058 X509_NAME *cnm = X509_CRL_get_issuer(crl);
1059 int cidx = ctx->error_depth;
1062 if (cidx != sk_X509_num(ctx->chain) - 1)
1065 crl_issuer = sk_X509_value(ctx->chain, cidx);
1067 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1069 if (*pcrl_score & CRL_SCORE_ISSUER_NAME)
1071 *pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_ISSUER_CERT;
1072 *pissuer = crl_issuer;
1077 for (cidx++; cidx < sk_X509_num(ctx->chain); cidx++)
1079 crl_issuer = sk_X509_value(ctx->chain, cidx);
1080 if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
1082 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1084 *pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_SAME_PATH;
1085 *pissuer = crl_issuer;
1090 /* Anything else needs extended CRL support */
1092 if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
1095 /* Otherwise the CRL issuer is not on the path. Look for it in the
1096 * set of untrusted certificates.
1098 for (i = 0; i < sk_X509_num(ctx->untrusted); i++)
1100 crl_issuer = sk_X509_value(ctx->untrusted, i);
1101 if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
1103 if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
1105 *pissuer = crl_issuer;
1106 *pcrl_score |= CRL_SCORE_AKID;
1112 /* Check the path of a CRL issuer certificate. This creates a new
1113 * X509_STORE_CTX and populates it with most of the parameters from the
1114 * parent. This could be optimised somewhat since a lot of path checking
1115 * will be duplicated by the parent, but this will rarely be used in
1119 static int check_crl_path(X509_STORE_CTX *ctx, X509 *x)
1121 X509_STORE_CTX crl_ctx;
1123 /* Don't allow recursive CRL path validation */
1126 if (!X509_STORE_CTX_init(&crl_ctx, ctx->ctx, x, ctx->untrusted))
1129 crl_ctx.crls = ctx->crls;
1130 /* Copy verify params across */
1131 X509_STORE_CTX_set0_param(&crl_ctx, ctx->param);
1133 crl_ctx.parent = ctx;
1134 crl_ctx.verify_cb = ctx->verify_cb;
1136 /* Verify CRL issuer */
1137 ret = X509_verify_cert(&crl_ctx);
1142 /* Check chain is acceptable */
1144 ret = check_crl_chain(ctx, ctx->chain, crl_ctx.chain);
1146 X509_STORE_CTX_cleanup(&crl_ctx);
1150 /* RFC3280 says nothing about the relationship between CRL path
1151 * and certificate path, which could lead to situations where a
1152 * certificate could be revoked or validated by a CA not authorised
1153 * to do so. RFC5280 is more strict and states that the two paths must
1154 * end in the same trust anchor, though some discussions remain...
1155 * until this is resolved we use the RFC5280 version
1158 static int check_crl_chain(X509_STORE_CTX *ctx,
1159 STACK_OF(X509) *cert_path,
1160 STACK_OF(X509) *crl_path)
1162 X509 *cert_ta, *crl_ta;
1163 cert_ta = sk_X509_value(cert_path, sk_X509_num(cert_path) - 1);
1164 crl_ta = sk_X509_value(crl_path, sk_X509_num(crl_path) - 1);
1165 if (!X509_cmp(cert_ta, crl_ta))
1170 /* Check for match between two dist point names: three separate cases.
1171 * 1. Both are relative names and compare X509_NAME types.
1172 * 2. One full, one relative. Compare X509_NAME to GENERAL_NAMES.
1173 * 3. Both are full names and compare two GENERAL_NAMES.
1174 * 4. One is NULL: automatic match.
1178 static int idp_check_dp(DIST_POINT_NAME *a, DIST_POINT_NAME *b)
1180 X509_NAME *nm = NULL;
1181 GENERAL_NAMES *gens = NULL;
1182 GENERAL_NAME *gena, *genb;
1190 /* Case 1: two X509_NAME */
1195 if (!X509_NAME_cmp(a->dpname, b->dpname))
1200 /* Case 2: set name and GENERAL_NAMES appropriately */
1202 gens = b->name.fullname;
1204 else if (b->type == 1)
1208 /* Case 2: set name and GENERAL_NAMES appropriately */
1209 gens = a->name.fullname;
1213 /* Handle case 2 with one GENERAL_NAMES and one X509_NAME */
1216 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
1218 gena = sk_GENERAL_NAME_value(gens, i);
1219 if (gena->type != GEN_DIRNAME)
1221 if (!X509_NAME_cmp(nm, gena->d.directoryName))
1227 /* Else case 3: two GENERAL_NAMES */
1229 for (i = 0; i < sk_GENERAL_NAME_num(a->name.fullname); i++)
1231 gena = sk_GENERAL_NAME_value(a->name.fullname, i);
1232 for (j = 0; j < sk_GENERAL_NAME_num(b->name.fullname); j++)
1234 genb = sk_GENERAL_NAME_value(b->name.fullname, j);
1235 if (!GENERAL_NAME_cmp(gena, genb))
1244 static int crldp_check_crlissuer(DIST_POINT *dp, X509_CRL *crl, int crl_score)
1247 X509_NAME *nm = X509_CRL_get_issuer(crl);
1248 /* If no CRLissuer return is successful iff don't need a match */
1250 return !!(crl_score & CRL_SCORE_ISSUER_NAME);
1251 for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++)
1253 GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
1254 if (gen->type != GEN_DIRNAME)
1256 if (!X509_NAME_cmp(gen->d.directoryName, nm))
1262 /* Check CRLDP and IDP */
1264 static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
1265 unsigned int *preasons)
1268 if (crl->idp_flags & IDP_ONLYATTR)
1270 if (x->ex_flags & EXFLAG_CA)
1272 if (crl->idp_flags & IDP_ONLYUSER)
1277 if (crl->idp_flags & IDP_ONLYCA)
1280 *preasons = crl->idp_reasons;
1281 for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
1283 DIST_POINT *dp = sk_DIST_POINT_value(x->crldp, i);
1284 if (crldp_check_crlissuer(dp, crl, crl_score))
1287 idp_check_dp(dp->distpoint, crl->idp->distpoint))
1289 *preasons &= dp->dp_reasons;
1294 if ((!crl->idp || !crl->idp->distpoint) && (crl_score & CRL_SCORE_ISSUER_NAME))
1299 /* Retrieve CRL corresponding to current certificate.
1300 * If deltas enabled try to find a delta CRL too
1303 static int get_crl_delta(X509_STORE_CTX *ctx,
1304 X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x)
1307 X509 *issuer = NULL;
1309 unsigned int reasons;
1310 X509_CRL *crl = NULL, *dcrl = NULL;
1311 STACK_OF(X509_CRL) *skcrl;
1312 X509_NAME *nm = X509_get_issuer_name(x);
1313 reasons = ctx->current_reasons;
1314 ok = get_crl_sk(ctx, &crl, &dcrl,
1315 &issuer, &crl_score, &reasons, ctx->crls);
1320 /* Lookup CRLs from store */
1322 skcrl = ctx->lookup_crls(ctx, nm);
1324 /* If no CRLs found and a near match from get_crl_sk use that */
1328 get_crl_sk(ctx, &crl, &dcrl, &issuer, &crl_score, &reasons, skcrl);
1330 sk_X509_CRL_pop_free(skcrl, X509_CRL_free);
1334 /* If we got any kind of CRL use it and return success */
1337 ctx->current_issuer = issuer;
1338 ctx->current_crl_score = crl_score;
1339 ctx->current_reasons = reasons;
1348 /* Check CRL validity */
1349 static int check_crl(X509_STORE_CTX *ctx, X509_CRL *crl)
1351 X509 *issuer = NULL;
1352 EVP_PKEY *ikey = NULL;
1353 int ok = 0, chnum, cnum;
1354 cnum = ctx->error_depth;
1355 chnum = sk_X509_num(ctx->chain) - 1;
1356 /* if we have an alternative CRL issuer cert use that */
1357 if (ctx->current_issuer)
1358 issuer = ctx->current_issuer;
1360 /* Else find CRL issuer: if not last certificate then issuer
1361 * is next certificate in chain.
1363 else if (cnum < chnum)
1364 issuer = sk_X509_value(ctx->chain, cnum + 1);
1367 issuer = sk_X509_value(ctx->chain, chnum);
1368 /* If not self signed, can't check signature */
1369 if(!ctx->check_issued(ctx, issuer, issuer))
1371 ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER;
1372 ok = ctx->verify_cb(0, ctx);
1379 /* Skip most tests for deltas because they have already
1382 if (!crl->base_crl_number)
1384 /* Check for cRLSign bit if keyUsage present */
1385 if ((issuer->ex_flags & EXFLAG_KUSAGE) &&
1386 !(issuer->ex_kusage & KU_CRL_SIGN))
1388 ctx->error = X509_V_ERR_KEYUSAGE_NO_CRL_SIGN;
1389 ok = ctx->verify_cb(0, ctx);
1393 if (!(ctx->current_crl_score & CRL_SCORE_SCOPE))
1395 ctx->error = X509_V_ERR_DIFFERENT_CRL_SCOPE;
1396 ok = ctx->verify_cb(0, ctx);
1400 if (!(ctx->current_crl_score & CRL_SCORE_SAME_PATH))
1402 if (check_crl_path(ctx, ctx->current_issuer) <= 0)
1404 ctx->error = X509_V_ERR_CRL_PATH_VALIDATION_ERROR;
1405 ok = ctx->verify_cb(0, ctx);
1410 if (crl->idp_flags & IDP_INVALID)
1412 ctx->error = X509_V_ERR_INVALID_EXTENSION;
1413 ok = ctx->verify_cb(0, ctx);
1420 if (!(ctx->current_crl_score & CRL_SCORE_TIME))
1422 ok = check_crl_time(ctx, crl, 1);
1427 /* Attempt to get issuer certificate public key */
1428 ikey = X509_get_pubkey(issuer);
1432 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
1433 ok = ctx->verify_cb(0, ctx);
1438 /* Verify CRL signature */
1439 if(X509_CRL_verify(crl, ikey) <= 0)
1441 ctx->error=X509_V_ERR_CRL_SIGNATURE_FAILURE;
1442 ok = ctx->verify_cb(0, ctx);
1451 EVP_PKEY_free(ikey);
1455 /* Check certificate against CRL */
1456 static int cert_crl(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x)
1460 /* The rules changed for this... previously if a CRL contained
1461 * unhandled critical extensions it could still be used to indicate
1462 * a certificate was revoked. This has since been changed since
1463 * critical extension can change the meaning of CRL entries.
1465 if (crl->flags & EXFLAG_CRITICAL)
1467 if (ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
1469 ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
1470 ok = ctx->verify_cb(0, ctx);
1474 /* Look for serial number of certificate in CRL
1475 * If found make sure reason is not removeFromCRL.
1477 if (X509_CRL_get0_by_cert(crl, &rev, x))
1479 if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
1481 ctx->error = X509_V_ERR_CERT_REVOKED;
1482 ok = ctx->verify_cb(0, ctx);
1490 static int check_policy(X509_STORE_CTX *ctx)
1495 ret = X509_policy_check(&ctx->tree, &ctx->explicit_policy, ctx->chain,
1496 ctx->param->policies, ctx->param->flags);
1499 X509err(X509_F_CHECK_POLICY,ERR_R_MALLOC_FAILURE);
1502 /* Invalid or inconsistent extensions */
1505 /* Locate certificates with bad extensions and notify
1510 for (i = 1; i < sk_X509_num(ctx->chain); i++)
1512 x = sk_X509_value(ctx->chain, i);
1513 if (!(x->ex_flags & EXFLAG_INVALID_POLICY))
1515 ctx->current_cert = x;
1516 ctx->error = X509_V_ERR_INVALID_POLICY_EXTENSION;
1517 if(!ctx->verify_cb(0, ctx))
1524 ctx->current_cert = NULL;
1525 ctx->error = X509_V_ERR_NO_EXPLICIT_POLICY;
1526 return ctx->verify_cb(0, ctx);
1529 if (ctx->param->flags & X509_V_FLAG_NOTIFY_POLICY)
1531 ctx->current_cert = NULL;
1532 ctx->error = X509_V_OK;
1533 if (!ctx->verify_cb(2, ctx))
1540 static int check_cert_time(X509_STORE_CTX *ctx, X509 *x)
1545 if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
1546 ptime = &ctx->param->check_time;
1550 i=X509_cmp_time(X509_get_notBefore(x), ptime);
1553 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
1554 ctx->current_cert=x;
1555 if (!ctx->verify_cb(0, ctx))
1561 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
1562 ctx->current_cert=x;
1563 if (!ctx->verify_cb(0, ctx))
1567 i=X509_cmp_time(X509_get_notAfter(x), ptime);
1570 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
1571 ctx->current_cert=x;
1572 if (!ctx->verify_cb(0, ctx))
1578 ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
1579 ctx->current_cert=x;
1580 if (!ctx->verify_cb(0, ctx))
1587 static int internal_verify(X509_STORE_CTX *ctx)
1591 EVP_PKEY *pkey=NULL;
1592 int (*cb)(int xok,X509_STORE_CTX *xctx);
1596 n=sk_X509_num(ctx->chain);
1597 ctx->error_depth=n-1;
1599 xi=sk_X509_value(ctx->chain,n);
1601 if (ctx->check_issued(ctx, xi, xi))
1607 ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
1608 ctx->current_cert=xi;
1616 xs=sk_X509_value(ctx->chain,n);
1620 /* ctx->error=0; not needed */
1625 /* Skip signature check for self signed certificates unless
1626 * explicitly asked for. It doesn't add any security and
1629 if (!xs->valid && (xs != xi || (ctx->param->flags & X509_V_FLAG_CHECK_SS_SIGNATURE)))
1631 if ((pkey=X509_get_pubkey(xi)) == NULL)
1633 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
1634 ctx->current_cert=xi;
1638 else if (X509_verify(xs,pkey) <= 0)
1640 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
1641 ctx->current_cert=xs;
1645 EVP_PKEY_free(pkey);
1649 EVP_PKEY_free(pkey);
1655 ok = check_cert_time(ctx, xs);
1659 /* The last error (if any) is still in the error value */
1660 ctx->current_issuer=xi;
1661 ctx->current_cert=xs;
1669 xs=sk_X509_value(ctx->chain,n);
1677 int X509_cmp_current_time(const ASN1_TIME *ctm)
1679 return X509_cmp_time(ctm, NULL);
1682 int X509_cmp_time(const ASN1_TIME *ctm, time_t *cmp_time)
1687 char buff1[24],buff2[24],*p;
1692 str=(char *)ctm->data;
1693 if (ctm->type == V_ASN1_UTCTIME)
1695 if ((i < 11) || (i > 17)) return 0;
1702 if (i < 13) return 0;
1708 if ((*str == 'Z') || (*str == '-') || (*str == '+'))
1709 { *(p++)='0'; *(p++)='0'; }
1714 /* Skip any fractional seconds... */
1718 while ((*str >= '0') && (*str <= '9')) str++;
1729 if ((*str != '+') && (*str != '-'))
1731 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
1732 offset+=(str[3]-'0')*10+(str[4]-'0');
1738 atm.length=sizeof(buff2);
1739 atm.data=(unsigned char *)buff2;
1741 if (X509_time_adj(&atm, offset*60, cmp_time) == NULL)
1744 if (ctm->type == V_ASN1_UTCTIME)
1746 i=(buff1[0]-'0')*10+(buff1[1]-'0');
1747 if (i < 50) i+=100; /* cf. RFC 2459 */
1748 j=(buff2[0]-'0')*10+(buff2[1]-'0');
1751 if (i < j) return -1;
1752 if (i > j) return 1;
1754 i=strcmp(buff1,buff2);
1755 if (i == 0) /* wait a second then return younger :-) */
1761 ASN1_TIME *X509_gmtime_adj(ASN1_TIME *s, long adj)
1763 return X509_time_adj(s, adj, NULL);
1766 ASN1_TIME *X509_time_adj(ASN1_TIME *s, long offset_sec, time_t *in_tm)
1768 return X509_time_adj_ex(s, 0, offset_sec, in_tm);
1771 ASN1_TIME *X509_time_adj_ex(ASN1_TIME *s,
1772 int offset_day, long offset_sec, time_t *in_tm)
1776 if (in_tm) t = *in_tm;
1779 if (s && !(s->flags & ASN1_STRING_FLAG_MSTRING))
1781 if (s->type == V_ASN1_UTCTIME)
1782 return ASN1_UTCTIME_adj(s,t, offset_day, offset_sec);
1783 if (s->type == V_ASN1_GENERALIZEDTIME)
1784 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day,
1787 return ASN1_TIME_adj(s, t, offset_day, offset_sec);
1790 int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
1792 EVP_PKEY *ktmp=NULL,*ktmp2;
1795 if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return 1;
1797 for (i=0; i<sk_X509_num(chain); i++)
1799 ktmp=X509_get_pubkey(sk_X509_value(chain,i));
1802 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
1805 if (!EVP_PKEY_missing_parameters(ktmp))
1809 EVP_PKEY_free(ktmp);
1815 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
1819 /* first, populate the other certs */
1820 for (j=i-1; j >= 0; j--)
1822 ktmp2=X509_get_pubkey(sk_X509_value(chain,j));
1823 EVP_PKEY_copy_parameters(ktmp2,ktmp);
1824 EVP_PKEY_free(ktmp2);
1827 if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
1828 EVP_PKEY_free(ktmp);
1832 int X509_STORE_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
1833 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
1835 /* This function is (usually) called only once, by
1836 * SSL_get_ex_data_X509_STORE_CTX_idx (ssl/ssl_cert.c). */
1837 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509_STORE_CTX, argl, argp,
1838 new_func, dup_func, free_func);
1841 int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
1843 return CRYPTO_set_ex_data(&ctx->ex_data,idx,data);
1846 void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
1848 return CRYPTO_get_ex_data(&ctx->ex_data,idx);
1851 int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
1856 void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
1861 int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
1863 return ctx->error_depth;
1866 X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
1868 return ctx->current_cert;
1871 STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
1876 STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx)
1880 STACK_OF(X509) *chain;
1881 if (!ctx->chain || !(chain = sk_X509_dup(ctx->chain))) return NULL;
1882 for (i = 0; i < sk_X509_num(chain); i++)
1884 x = sk_X509_value(chain, i);
1885 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1890 X509 *X509_STORE_CTX_get0_current_issuer(X509_STORE_CTX *ctx)
1892 return ctx->current_issuer;
1895 X509_CRL *X509_STORE_CTX_get0_current_crl(X509_STORE_CTX *ctx)
1897 return ctx->current_crl;
1900 X509_STORE_CTX *X509_STORE_CTX_get0_parent_ctx(X509_STORE_CTX *ctx)
1905 void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
1910 void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
1915 void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk)
1920 int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose)
1922 return X509_STORE_CTX_purpose_inherit(ctx, 0, purpose, 0);
1925 int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust)
1927 return X509_STORE_CTX_purpose_inherit(ctx, 0, 0, trust);
1930 /* This function is used to set the X509_STORE_CTX purpose and trust
1931 * values. This is intended to be used when another structure has its
1932 * own trust and purpose values which (if set) will be inherited by
1933 * the ctx. If they aren't set then we will usually have a default
1934 * purpose in mind which should then be used to set the trust value.
1935 * An example of this is SSL use: an SSL structure will have its own
1936 * purpose and trust settings which the application can set: if they
1937 * aren't set then we use the default of SSL client/server.
1940 int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
1941 int purpose, int trust)
1944 /* If purpose not set use default */
1945 if (!purpose) purpose = def_purpose;
1946 /* If we have a purpose then check it is valid */
1950 idx = X509_PURPOSE_get_by_id(purpose);
1953 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
1954 X509_R_UNKNOWN_PURPOSE_ID);
1957 ptmp = X509_PURPOSE_get0(idx);
1958 if (ptmp->trust == X509_TRUST_DEFAULT)
1960 idx = X509_PURPOSE_get_by_id(def_purpose);
1963 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
1964 X509_R_UNKNOWN_PURPOSE_ID);
1967 ptmp = X509_PURPOSE_get0(idx);
1969 /* If trust not set then get from purpose default */
1970 if (!trust) trust = ptmp->trust;
1974 idx = X509_TRUST_get_by_id(trust);
1977 X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
1978 X509_R_UNKNOWN_TRUST_ID);
1983 if (purpose && !ctx->param->purpose) ctx->param->purpose = purpose;
1984 if (trust && !ctx->param->trust) ctx->param->trust = trust;
1988 X509_STORE_CTX *X509_STORE_CTX_new(void)
1990 X509_STORE_CTX *ctx;
1991 ctx = (X509_STORE_CTX *)OPENSSL_malloc(sizeof(X509_STORE_CTX));
1994 X509err(X509_F_X509_STORE_CTX_NEW,ERR_R_MALLOC_FAILURE);
1997 memset(ctx, 0, sizeof(X509_STORE_CTX));
2001 void X509_STORE_CTX_free(X509_STORE_CTX *ctx)
2003 X509_STORE_CTX_cleanup(ctx);
2007 int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
2008 STACK_OF(X509) *chain)
2012 ctx->current_method=0;
2014 ctx->untrusted=chain;
2016 ctx->last_untrusted=0;
2017 ctx->other_ctx=NULL;
2021 ctx->explicit_policy=0;
2023 ctx->current_cert=NULL;
2024 ctx->current_issuer=NULL;
2025 ctx->current_crl=NULL;
2026 ctx->current_crl_score=0;
2027 ctx->current_reasons=0;
2031 ctx->param = X509_VERIFY_PARAM_new();
2035 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2039 /* Inherit callbacks and flags from X509_STORE if not set
2045 ret = X509_VERIFY_PARAM_inherit(ctx->param, store->param);
2047 ctx->param->inh_flags |= X509_VP_FLAG_DEFAULT|X509_VP_FLAG_ONCE;
2051 ctx->verify_cb = store->verify_cb;
2052 ctx->cleanup = store->cleanup;
2058 ret = X509_VERIFY_PARAM_inherit(ctx->param,
2059 X509_VERIFY_PARAM_lookup("default"));
2063 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2067 if (store && store->check_issued)
2068 ctx->check_issued = store->check_issued;
2070 ctx->check_issued = check_issued;
2072 if (store && store->get_issuer)
2073 ctx->get_issuer = store->get_issuer;
2075 ctx->get_issuer = X509_STORE_CTX_get1_issuer;
2077 if (store && store->verify_cb)
2078 ctx->verify_cb = store->verify_cb;
2080 ctx->verify_cb = null_callback;
2082 if (store && store->verify)
2083 ctx->verify = store->verify;
2085 ctx->verify = internal_verify;
2087 if (store && store->check_revocation)
2088 ctx->check_revocation = store->check_revocation;
2090 ctx->check_revocation = check_revocation;
2092 if (store && store->get_crl)
2093 ctx->get_crl = store->get_crl;
2095 ctx->get_crl = NULL;
2097 if (store && store->check_crl)
2098 ctx->check_crl = store->check_crl;
2100 ctx->check_crl = check_crl;
2102 if (store && store->cert_crl)
2103 ctx->cert_crl = store->cert_crl;
2105 ctx->cert_crl = cert_crl;
2107 if (store && store->lookup_certs)
2108 ctx->lookup_certs = store->lookup_certs;
2110 ctx->lookup_certs = X509_STORE_get1_certs;
2112 if (store && store->lookup_crls)
2113 ctx->lookup_crls = store->lookup_crls;
2115 ctx->lookup_crls = X509_STORE_get1_crls;
2117 ctx->check_policy = check_policy;
2120 /* This memset() can't make any sense anyway, so it's removed. As
2121 * X509_STORE_CTX_cleanup does a proper "free" on the ex_data, we put a
2122 * corresponding "new" here and remove this bogus initialisation. */
2123 /* memset(&(ctx->ex_data),0,sizeof(CRYPTO_EX_DATA)); */
2124 if(!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx,
2128 X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
2134 /* Set alternative lookup method: just a STACK of trusted certificates.
2135 * This avoids X509_STORE nastiness where it isn't needed.
2138 void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
2140 ctx->other_ctx = sk;
2141 ctx->get_issuer = get_issuer_sk;
2144 void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx)
2146 if (ctx->cleanup) ctx->cleanup(ctx);
2147 if (ctx->param != NULL)
2149 if (ctx->parent == NULL)
2150 X509_VERIFY_PARAM_free(ctx->param);
2153 if (ctx->tree != NULL)
2155 X509_policy_tree_free(ctx->tree);
2158 if (ctx->chain != NULL)
2160 sk_X509_pop_free(ctx->chain,X509_free);
2163 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx, &(ctx->ex_data));
2164 memset(&ctx->ex_data,0,sizeof(CRYPTO_EX_DATA));
2167 void X509_STORE_CTX_set_depth(X509_STORE_CTX *ctx, int depth)
2169 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2172 void X509_STORE_CTX_set_flags(X509_STORE_CTX *ctx, unsigned long flags)
2174 X509_VERIFY_PARAM_set_flags(ctx->param, flags);
2177 void X509_STORE_CTX_set_time(X509_STORE_CTX *ctx, unsigned long flags, time_t t)
2179 X509_VERIFY_PARAM_set_time(ctx->param, t);
2182 void X509_STORE_CTX_set_verify_cb(X509_STORE_CTX *ctx,
2183 int (*verify_cb)(int, X509_STORE_CTX *))
2185 ctx->verify_cb=verify_cb;
2188 X509_POLICY_TREE *X509_STORE_CTX_get0_policy_tree(X509_STORE_CTX *ctx)
2193 int X509_STORE_CTX_get_explicit_policy(X509_STORE_CTX *ctx)
2195 return ctx->explicit_policy;
2198 int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name)
2200 const X509_VERIFY_PARAM *param;
2201 param = X509_VERIFY_PARAM_lookup(name);
2204 return X509_VERIFY_PARAM_inherit(ctx->param, param);
2207 X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx)
2212 void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param)
2215 X509_VERIFY_PARAM_free(ctx->param);
2219 IMPLEMENT_STACK_OF(X509)
2220 IMPLEMENT_ASN1_SET_OF(X509)
2222 IMPLEMENT_STACK_OF(X509_NAME)
2224 IMPLEMENT_STACK_OF(X509_ATTRIBUTE)
2225 IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE)