2 * Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include "internal/numbers.h"
13 #include <openssl/x509v3.h>
14 #include <openssl/x509_vfy.h>
15 #include "internal/x509_int.h"
16 #include "internal/tsan_assist.h"
18 static void x509v3_cache_extensions(X509 *x);
20 static int check_ssl_ca(const X509 *x);
21 static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
23 static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
25 static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
27 static int purpose_smime(const X509 *x, int ca);
28 static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
30 static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
32 static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
34 static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
36 static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca);
37 static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca);
39 static int xp_cmp(const X509_PURPOSE *const *a, const X509_PURPOSE *const *b);
40 static void xptable_free(X509_PURPOSE *p);
42 static X509_PURPOSE xstandard[] = {
43 {X509_PURPOSE_SSL_CLIENT, X509_TRUST_SSL_CLIENT, 0,
44 check_purpose_ssl_client, "SSL client", "sslclient", NULL},
45 {X509_PURPOSE_SSL_SERVER, X509_TRUST_SSL_SERVER, 0,
46 check_purpose_ssl_server, "SSL server", "sslserver", NULL},
47 {X509_PURPOSE_NS_SSL_SERVER, X509_TRUST_SSL_SERVER, 0,
48 check_purpose_ns_ssl_server, "Netscape SSL server", "nssslserver", NULL},
49 {X509_PURPOSE_SMIME_SIGN, X509_TRUST_EMAIL, 0, check_purpose_smime_sign,
50 "S/MIME signing", "smimesign", NULL},
51 {X509_PURPOSE_SMIME_ENCRYPT, X509_TRUST_EMAIL, 0,
52 check_purpose_smime_encrypt, "S/MIME encryption", "smimeencrypt", NULL},
53 {X509_PURPOSE_CRL_SIGN, X509_TRUST_COMPAT, 0, check_purpose_crl_sign,
54 "CRL signing", "crlsign", NULL},
55 {X509_PURPOSE_ANY, X509_TRUST_DEFAULT, 0, no_check, "Any Purpose", "any",
57 {X509_PURPOSE_OCSP_HELPER, X509_TRUST_COMPAT, 0, ocsp_helper,
58 "OCSP helper", "ocsphelper", NULL},
59 {X509_PURPOSE_TIMESTAMP_SIGN, X509_TRUST_TSA, 0,
60 check_purpose_timestamp_sign, "Time Stamp signing", "timestampsign",
64 #define X509_PURPOSE_COUNT OSSL_NELEM(xstandard)
66 static STACK_OF(X509_PURPOSE) *xptable = NULL;
68 static int xp_cmp(const X509_PURPOSE *const *a, const X509_PURPOSE *const *b)
70 return (*a)->purpose - (*b)->purpose;
74 * As much as I'd like to make X509_check_purpose use a "const" X509* I
75 * really can't because it does recalculate hashes and do other non-const
78 int X509_check_purpose(X509 *x, int id, int ca)
81 const X509_PURPOSE *pt;
83 x509v3_cache_extensions(x);
85 /* Return if side-effect only call */
88 idx = X509_PURPOSE_get_by_id(id);
91 pt = X509_PURPOSE_get0(idx);
92 return pt->check_purpose(pt, x, ca);
95 int X509_PURPOSE_set(int *p, int purpose)
97 if (X509_PURPOSE_get_by_id(purpose) == -1) {
98 X509V3err(X509V3_F_X509_PURPOSE_SET, X509V3_R_INVALID_PURPOSE);
105 int X509_PURPOSE_get_count(void)
108 return X509_PURPOSE_COUNT;
109 return sk_X509_PURPOSE_num(xptable) + X509_PURPOSE_COUNT;
112 X509_PURPOSE *X509_PURPOSE_get0(int idx)
116 if (idx < (int)X509_PURPOSE_COUNT)
117 return xstandard + idx;
118 return sk_X509_PURPOSE_value(xptable, idx - X509_PURPOSE_COUNT);
121 int X509_PURPOSE_get_by_sname(const char *sname)
125 for (i = 0; i < X509_PURPOSE_get_count(); i++) {
126 xptmp = X509_PURPOSE_get0(i);
127 if (strcmp(xptmp->sname, sname) == 0)
133 int X509_PURPOSE_get_by_id(int purpose)
138 if ((purpose >= X509_PURPOSE_MIN) && (purpose <= X509_PURPOSE_MAX))
139 return purpose - X509_PURPOSE_MIN;
142 tmp.purpose = purpose;
143 idx = sk_X509_PURPOSE_find(xptable, &tmp);
146 return idx + X509_PURPOSE_COUNT;
149 int X509_PURPOSE_add(int id, int trust, int flags,
150 int (*ck) (const X509_PURPOSE *, const X509 *, int),
151 const char *name, const char *sname, void *arg)
156 * This is set according to what we change: application can't set it
158 flags &= ~X509_PURPOSE_DYNAMIC;
159 /* This will always be set for application modified trust entries */
160 flags |= X509_PURPOSE_DYNAMIC_NAME;
161 /* Get existing entry if any */
162 idx = X509_PURPOSE_get_by_id(id);
163 /* Need a new entry */
165 if ((ptmp = OPENSSL_malloc(sizeof(*ptmp))) == NULL) {
166 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
169 ptmp->flags = X509_PURPOSE_DYNAMIC;
171 ptmp = X509_PURPOSE_get0(idx);
173 /* OPENSSL_free existing name if dynamic */
174 if (ptmp->flags & X509_PURPOSE_DYNAMIC_NAME) {
175 OPENSSL_free(ptmp->name);
176 OPENSSL_free(ptmp->sname);
178 /* dup supplied name */
179 ptmp->name = OPENSSL_strdup(name);
180 ptmp->sname = OPENSSL_strdup(sname);
181 if (!ptmp->name || !ptmp->sname) {
182 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
185 /* Keep the dynamic flag of existing entry */
186 ptmp->flags &= X509_PURPOSE_DYNAMIC;
187 /* Set all other flags */
188 ptmp->flags |= flags;
192 ptmp->check_purpose = ck;
193 ptmp->usr_data = arg;
195 /* If its a new entry manage the dynamic table */
198 && (xptable = sk_X509_PURPOSE_new(xp_cmp)) == NULL) {
199 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
202 if (!sk_X509_PURPOSE_push(xptable, ptmp)) {
203 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
210 OPENSSL_free(ptmp->name);
211 OPENSSL_free(ptmp->sname);
217 static void xptable_free(X509_PURPOSE *p)
221 if (p->flags & X509_PURPOSE_DYNAMIC) {
222 if (p->flags & X509_PURPOSE_DYNAMIC_NAME) {
223 OPENSSL_free(p->name);
224 OPENSSL_free(p->sname);
230 void X509_PURPOSE_cleanup(void)
232 sk_X509_PURPOSE_pop_free(xptable, xptable_free);
236 int X509_PURPOSE_get_id(const X509_PURPOSE *xp)
241 char *X509_PURPOSE_get0_name(const X509_PURPOSE *xp)
246 char *X509_PURPOSE_get0_sname(const X509_PURPOSE *xp)
251 int X509_PURPOSE_get_trust(const X509_PURPOSE *xp)
256 static int nid_cmp(const int *a, const int *b)
261 DECLARE_OBJ_BSEARCH_CMP_FN(int, int, nid);
262 IMPLEMENT_OBJ_BSEARCH_CMP_FN(int, int, nid);
264 int X509_supported_extension(X509_EXTENSION *ex)
267 * This table is a list of the NIDs of supported extensions: that is
268 * those which are used by the verify process. If an extension is
269 * critical and doesn't appear in this list then the verify process will
270 * normally reject the certificate. The list must be kept in numerical
271 * order because it will be searched using bsearch.
274 static const int supported_nids[] = {
275 NID_netscape_cert_type, /* 71 */
276 NID_key_usage, /* 83 */
277 NID_subject_alt_name, /* 85 */
278 NID_basic_constraints, /* 87 */
279 NID_certificate_policies, /* 89 */
280 NID_crl_distribution_points, /* 103 */
281 NID_ext_key_usage, /* 126 */
282 #ifndef OPENSSL_NO_RFC3779
283 NID_sbgp_ipAddrBlock, /* 290 */
284 NID_sbgp_autonomousSysNum, /* 291 */
286 NID_policy_constraints, /* 401 */
287 NID_proxyCertInfo, /* 663 */
288 NID_name_constraints, /* 666 */
289 NID_policy_mappings, /* 747 */
290 NID_inhibit_any_policy /* 748 */
293 int ex_nid = OBJ_obj2nid(X509_EXTENSION_get_object(ex));
295 if (ex_nid == NID_undef)
298 if (OBJ_bsearch_nid(&ex_nid, supported_nids, OSSL_NELEM(supported_nids)))
303 static void setup_dp(X509 *x, DIST_POINT *dp)
305 X509_NAME *iname = NULL;
308 if (dp->reasons->length > 0)
309 dp->dp_reasons = dp->reasons->data[0];
310 if (dp->reasons->length > 1)
311 dp->dp_reasons |= (dp->reasons->data[1] << 8);
312 dp->dp_reasons &= CRLDP_ALL_REASONS;
314 dp->dp_reasons = CRLDP_ALL_REASONS;
315 if (!dp->distpoint || (dp->distpoint->type != 1))
317 for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++) {
318 GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
319 if (gen->type == GEN_DIRNAME) {
320 iname = gen->d.directoryName;
325 iname = X509_get_issuer_name(x);
327 DIST_POINT_set_dpname(dp->distpoint, iname);
331 static void setup_crldp(X509 *x)
334 x->crldp = X509_get_ext_d2i(x, NID_crl_distribution_points, NULL, NULL);
335 for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
336 setup_dp(x, sk_DIST_POINT_value(x->crldp, i));
339 #define V1_ROOT (EXFLAG_V1|EXFLAG_SS)
340 #define ku_reject(x, usage) \
341 (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
342 #define xku_reject(x, usage) \
343 (((x)->ex_flags & EXFLAG_XKUSAGE) && !((x)->ex_xkusage & (usage)))
344 #define ns_reject(x, usage) \
345 (((x)->ex_flags & EXFLAG_NSCERT) && !((x)->ex_nscert & (usage)))
347 static void x509v3_cache_extensions(X509 *x)
349 BASIC_CONSTRAINTS *bs;
350 PROXY_CERT_INFO_EXTENSION *pci;
351 ASN1_BIT_STRING *usage;
353 EXTENDED_KEY_USAGE *extusage;
358 /* fast lock-free check, see end of the function for details. */
359 if (tsan_ld_acq((TSAN_QUALIFIER int *)&x->ex_cached))
363 CRYPTO_THREAD_write_lock(x->lock);
364 if (x->ex_flags & EXFLAG_SET) {
365 CRYPTO_THREAD_unlock(x->lock);
369 X509_digest(x, EVP_sha1(), x->sha1_hash, NULL);
370 /* V1 should mean no extensions ... */
371 if (!X509_get_version(x))
372 x->ex_flags |= EXFLAG_V1;
373 /* Handle basic constraints */
374 if ((bs = X509_get_ext_d2i(x, NID_basic_constraints, NULL, NULL))) {
376 x->ex_flags |= EXFLAG_CA;
378 if ((bs->pathlen->type == V_ASN1_NEG_INTEGER)
380 x->ex_flags |= EXFLAG_INVALID;
383 x->ex_pathlen = ASN1_INTEGER_get(bs->pathlen);
386 BASIC_CONSTRAINTS_free(bs);
387 x->ex_flags |= EXFLAG_BCONS;
389 /* Handle proxy certificates */
390 if ((pci = X509_get_ext_d2i(x, NID_proxyCertInfo, NULL, NULL))) {
391 if (x->ex_flags & EXFLAG_CA
392 || X509_get_ext_by_NID(x, NID_subject_alt_name, -1) >= 0
393 || X509_get_ext_by_NID(x, NID_issuer_alt_name, -1) >= 0) {
394 x->ex_flags |= EXFLAG_INVALID;
396 if (pci->pcPathLengthConstraint) {
397 x->ex_pcpathlen = ASN1_INTEGER_get(pci->pcPathLengthConstraint);
399 x->ex_pcpathlen = -1;
400 PROXY_CERT_INFO_EXTENSION_free(pci);
401 x->ex_flags |= EXFLAG_PROXY;
403 /* Handle key usage */
404 if ((usage = X509_get_ext_d2i(x, NID_key_usage, NULL, NULL))) {
405 if (usage->length > 0) {
406 x->ex_kusage = usage->data[0];
407 if (usage->length > 1)
408 x->ex_kusage |= usage->data[1] << 8;
411 x->ex_flags |= EXFLAG_KUSAGE;
412 ASN1_BIT_STRING_free(usage);
415 if ((extusage = X509_get_ext_d2i(x, NID_ext_key_usage, NULL, NULL))) {
416 x->ex_flags |= EXFLAG_XKUSAGE;
417 for (i = 0; i < sk_ASN1_OBJECT_num(extusage); i++) {
418 switch (OBJ_obj2nid(sk_ASN1_OBJECT_value(extusage, i))) {
419 case NID_server_auth:
420 x->ex_xkusage |= XKU_SSL_SERVER;
423 case NID_client_auth:
424 x->ex_xkusage |= XKU_SSL_CLIENT;
427 case NID_email_protect:
428 x->ex_xkusage |= XKU_SMIME;
432 x->ex_xkusage |= XKU_CODE_SIGN;
437 x->ex_xkusage |= XKU_SGC;
441 x->ex_xkusage |= XKU_OCSP_SIGN;
445 x->ex_xkusage |= XKU_TIMESTAMP;
449 x->ex_xkusage |= XKU_DVCS;
452 case NID_anyExtendedKeyUsage:
453 x->ex_xkusage |= XKU_ANYEKU;
457 sk_ASN1_OBJECT_pop_free(extusage, ASN1_OBJECT_free);
460 if ((ns = X509_get_ext_d2i(x, NID_netscape_cert_type, NULL, NULL))) {
462 x->ex_nscert = ns->data[0];
465 x->ex_flags |= EXFLAG_NSCERT;
466 ASN1_BIT_STRING_free(ns);
468 x->skid = X509_get_ext_d2i(x, NID_subject_key_identifier, NULL, NULL);
469 x->akid = X509_get_ext_d2i(x, NID_authority_key_identifier, NULL, NULL);
470 /* Does subject name match issuer ? */
471 if (!X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x))) {
472 x->ex_flags |= EXFLAG_SI;
473 /* If SKID matches AKID also indicate self signed */
474 if (X509_check_akid(x, x->akid) == X509_V_OK &&
475 !ku_reject(x, KU_KEY_CERT_SIGN))
476 x->ex_flags |= EXFLAG_SS;
478 x->altname = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
479 x->nc = X509_get_ext_d2i(x, NID_name_constraints, &i, NULL);
480 if (!x->nc && (i != -1))
481 x->ex_flags |= EXFLAG_INVALID;
484 #ifndef OPENSSL_NO_RFC3779
485 x->rfc3779_addr = X509_get_ext_d2i(x, NID_sbgp_ipAddrBlock, NULL, NULL);
486 x->rfc3779_asid = X509_get_ext_d2i(x, NID_sbgp_autonomousSysNum,
489 for (i = 0; i < X509_get_ext_count(x); i++) {
490 ex = X509_get_ext(x, i);
491 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex))
493 x->ex_flags |= EXFLAG_FRESHEST;
494 if (!X509_EXTENSION_get_critical(ex))
496 if (!X509_supported_extension(ex)) {
497 x->ex_flags |= EXFLAG_CRITICAL;
501 x509_init_sig_info(x);
502 x->ex_flags |= EXFLAG_SET;
504 tsan_st_rel((TSAN_QUALIFIER int *)&x->ex_cached, 1);
506 * Above store triggers fast lock-free check in the beginning of the
507 * function. But one has to ensure that the structure is "stable", i.e.
508 * all stores are visible on all processors. Hence the release fence.
511 CRYPTO_THREAD_unlock(x->lock);
515 * CA checks common to all purposes
519 * 2 basicConstraints absent so "maybe" a CA
520 * 3 basicConstraints absent but self signed V1.
521 * 4 basicConstraints absent but keyUsage present and keyCertSign asserted.
524 static int check_ca(const X509 *x)
526 /* keyUsage if present should allow cert signing */
527 if (ku_reject(x, KU_KEY_CERT_SIGN))
529 if (x->ex_flags & EXFLAG_BCONS) {
530 if (x->ex_flags & EXFLAG_CA)
532 /* If basicConstraints says not a CA then say so */
536 /* we support V1 roots for... uh, I don't really know why. */
537 if ((x->ex_flags & V1_ROOT) == V1_ROOT)
540 * If key usage present it must have certSign so tolerate it
542 else if (x->ex_flags & EXFLAG_KUSAGE)
544 /* Older certificates could have Netscape-specific CA types */
545 else if (x->ex_flags & EXFLAG_NSCERT && x->ex_nscert & NS_ANY_CA)
547 /* can this still be regarded a CA certificate? I doubt it */
552 void X509_set_proxy_flag(X509 *x)
554 x->ex_flags |= EXFLAG_PROXY;
557 void X509_set_proxy_pathlen(X509 *x, long l)
562 int X509_check_ca(X509 *x)
564 x509v3_cache_extensions(x);
569 /* Check SSL CA: common checks for SSL client and server */
570 static int check_ssl_ca(const X509 *x)
573 ca_ret = check_ca(x);
576 /* check nsCertType if present */
577 if (ca_ret != 5 || x->ex_nscert & NS_SSL_CA)
583 static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
586 if (xku_reject(x, XKU_SSL_CLIENT))
589 return check_ssl_ca(x);
590 /* We need to do digital signatures or key agreement */
591 if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_KEY_AGREEMENT))
593 /* nsCertType if present should allow SSL client use */
594 if (ns_reject(x, NS_SSL_CLIENT))
600 * Key usage needed for TLS/SSL server: digital signature, encipherment or
601 * key agreement. The ssl code can check this more thoroughly for individual
605 KU_DIGITAL_SIGNATURE|KU_KEY_ENCIPHERMENT|KU_KEY_AGREEMENT
607 static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
610 if (xku_reject(x, XKU_SSL_SERVER | XKU_SGC))
613 return check_ssl_ca(x);
615 if (ns_reject(x, NS_SSL_SERVER))
617 if (ku_reject(x, KU_TLS))
624 static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
628 ret = check_purpose_ssl_server(xp, x, ca);
631 /* We need to encipher or Netscape complains */
632 if (ku_reject(x, KU_KEY_ENCIPHERMENT))
637 /* common S/MIME checks */
638 static int purpose_smime(const X509 *x, int ca)
640 if (xku_reject(x, XKU_SMIME))
644 ca_ret = check_ca(x);
647 /* check nsCertType if present */
648 if (ca_ret != 5 || x->ex_nscert & NS_SMIME_CA)
653 if (x->ex_flags & EXFLAG_NSCERT) {
654 if (x->ex_nscert & NS_SMIME)
656 /* Workaround for some buggy certificates */
657 if (x->ex_nscert & NS_SSL_CLIENT)
664 static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
668 ret = purpose_smime(x, ca);
671 if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_NON_REPUDIATION))
676 static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
680 ret = purpose_smime(x, ca);
683 if (ku_reject(x, KU_KEY_ENCIPHERMENT))
688 static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
693 if ((ca_ret = check_ca(x)) != 2)
698 if (ku_reject(x, KU_CRL_SIGN))
704 * OCSP helper: this is *not* a full OCSP check. It just checks that each CA
705 * is valid. Additional checks must be made on the chain.
708 static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca)
711 * Must be a valid CA. Should we really support the "I don't know" value
716 /* leaf certificate is checked in OCSP_verify() */
720 static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
725 /* If ca is true we must return if this is a valid CA certificate. */
730 * Check the optional key usage field:
731 * if Key Usage is present, it must be one of digitalSignature
732 * and/or nonRepudiation (other values are not consistent and shall
735 if ((x->ex_flags & EXFLAG_KUSAGE)
736 && ((x->ex_kusage & ~(KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE)) ||
737 !(x->ex_kusage & (KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE))))
740 /* Only time stamp key usage is permitted and it's required. */
741 if (!(x->ex_flags & EXFLAG_XKUSAGE) || x->ex_xkusage != XKU_TIMESTAMP)
744 /* Extended Key Usage MUST be critical */
745 i_ext = X509_get_ext_by_NID(x, NID_ext_key_usage, -1);
747 X509_EXTENSION *ext = X509_get_ext((X509 *)x, i_ext);
748 if (!X509_EXTENSION_get_critical(ext))
755 static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca)
761 * Various checks to see if one certificate issued the second.
762 * This can be used to prune a set of possible issuer certificates
763 * which have been looked up using some simple method such as by
766 * 1. Check issuer_name(subject) == subject_name(issuer)
767 * 2. If akid(subject) exists check it matches issuer
768 * 3. If key_usage(issuer) exists check it supports certificate signing
769 * returns 0 for OK, positive for reason for mismatch, reasons match
770 * codes for X509_verify_cert()
773 int X509_check_issued(X509 *issuer, X509 *subject)
775 if (X509_NAME_cmp(X509_get_subject_name(issuer),
776 X509_get_issuer_name(subject)))
777 return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
779 x509v3_cache_extensions(issuer);
780 x509v3_cache_extensions(subject);
783 int ret = X509_check_akid(issuer, subject->akid);
784 if (ret != X509_V_OK)
788 if (subject->ex_flags & EXFLAG_PROXY) {
789 if (ku_reject(issuer, KU_DIGITAL_SIGNATURE))
790 return X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE;
791 } else if (ku_reject(issuer, KU_KEY_CERT_SIGN))
792 return X509_V_ERR_KEYUSAGE_NO_CERTSIGN;
796 int X509_check_akid(X509 *issuer, AUTHORITY_KEYID *akid)
802 /* Check key ids (if present) */
803 if (akid->keyid && issuer->skid &&
804 ASN1_OCTET_STRING_cmp(akid->keyid, issuer->skid))
805 return X509_V_ERR_AKID_SKID_MISMATCH;
806 /* Check serial number */
808 ASN1_INTEGER_cmp(X509_get_serialNumber(issuer), akid->serial))
809 return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
810 /* Check issuer name */
813 * Ugh, for some peculiar reason AKID includes SEQUENCE OF
814 * GeneralName. So look for a DirName. There may be more than one but
815 * we only take any notice of the first.
819 X509_NAME *nm = NULL;
822 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
823 gen = sk_GENERAL_NAME_value(gens, i);
824 if (gen->type == GEN_DIRNAME) {
829 if (nm && X509_NAME_cmp(nm, X509_get_issuer_name(issuer)))
830 return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
835 uint32_t X509_get_extension_flags(X509 *x)
837 /* Call for side-effect of computing hash and caching extensions */
838 X509_check_purpose(x, -1, -1);
842 uint32_t X509_get_key_usage(X509 *x)
844 /* Call for side-effect of computing hash and caching extensions */
845 X509_check_purpose(x, -1, -1);
846 if (x->ex_flags & EXFLAG_KUSAGE)
851 uint32_t X509_get_extended_key_usage(X509 *x)
853 /* Call for side-effect of computing hash and caching extensions */
854 X509_check_purpose(x, -1, -1);
855 if (x->ex_flags & EXFLAG_XKUSAGE)
856 return x->ex_xkusage;
860 const ASN1_OCTET_STRING *X509_get0_subject_key_id(X509 *x)
862 /* Call for side-effect of computing hash and caching extensions */
863 X509_check_purpose(x, -1, -1);
867 const ASN1_OCTET_STRING *X509_get0_authority_key_id(X509 *x)
869 /* Call for side-effect of computing hash and caching extensions */
870 X509_check_purpose(x, -1, -1);
871 return (x->akid != NULL ? x->akid->keyid : NULL);
874 long X509_get_pathlen(X509 *x)
876 /* Called for side effect of caching extensions */
877 if (X509_check_purpose(x, -1, -1) != 1
878 || (x->ex_flags & EXFLAG_BCONS) == 0)
880 return x->ex_pathlen;
883 long X509_get_proxy_pathlen(X509 *x)
885 /* Called for side effect of caching extensions */
886 if (X509_check_purpose(x, -1, -1) != 1
887 || (x->ex_flags & EXFLAG_PROXY) == 0)
889 return x->ex_pcpathlen;