2 * Copyright 1999-2016 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"
17 static void x509v3_cache_extensions(X509 *x);
19 static int check_ssl_ca(const X509 *x);
20 static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
22 static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
24 static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
26 static int purpose_smime(const X509 *x, int ca);
27 static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
29 static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
31 static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
33 static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
35 static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca);
36 static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca);
38 static int xp_cmp(const X509_PURPOSE *const *a, const X509_PURPOSE *const *b);
39 static void xptable_free(X509_PURPOSE *p);
41 static X509_PURPOSE xstandard[] = {
42 {X509_PURPOSE_SSL_CLIENT, X509_TRUST_SSL_CLIENT, 0,
43 check_purpose_ssl_client, "SSL client", "sslclient", NULL},
44 {X509_PURPOSE_SSL_SERVER, X509_TRUST_SSL_SERVER, 0,
45 check_purpose_ssl_server, "SSL server", "sslserver", NULL},
46 {X509_PURPOSE_NS_SSL_SERVER, X509_TRUST_SSL_SERVER, 0,
47 check_purpose_ns_ssl_server, "Netscape SSL server", "nssslserver", NULL},
48 {X509_PURPOSE_SMIME_SIGN, X509_TRUST_EMAIL, 0, check_purpose_smime_sign,
49 "S/MIME signing", "smimesign", NULL},
50 {X509_PURPOSE_SMIME_ENCRYPT, X509_TRUST_EMAIL, 0,
51 check_purpose_smime_encrypt, "S/MIME encryption", "smimeencrypt", NULL},
52 {X509_PURPOSE_CRL_SIGN, X509_TRUST_COMPAT, 0, check_purpose_crl_sign,
53 "CRL signing", "crlsign", NULL},
54 {X509_PURPOSE_ANY, X509_TRUST_DEFAULT, 0, no_check, "Any Purpose", "any",
56 {X509_PURPOSE_OCSP_HELPER, X509_TRUST_COMPAT, 0, ocsp_helper,
57 "OCSP helper", "ocsphelper", NULL},
58 {X509_PURPOSE_TIMESTAMP_SIGN, X509_TRUST_TSA, 0,
59 check_purpose_timestamp_sign, "Time Stamp signing", "timestampsign",
63 #define X509_PURPOSE_COUNT OSSL_NELEM(xstandard)
65 static STACK_OF(X509_PURPOSE) *xptable = NULL;
67 static int xp_cmp(const X509_PURPOSE *const *a, const X509_PURPOSE *const *b)
69 return (*a)->purpose - (*b)->purpose;
73 * As much as I'd like to make X509_check_purpose use a "const" X509* I
74 * really can't because it does recalculate hashes and do other non-const
77 int X509_check_purpose(X509 *x, int id, int ca)
80 const X509_PURPOSE *pt;
81 if (!(x->ex_flags & EXFLAG_SET)) {
82 CRYPTO_THREAD_write_lock(x->lock);
83 x509v3_cache_extensions(x);
84 CRYPTO_THREAD_unlock(x->lock);
86 /* Return if side-effect only call */
89 idx = X509_PURPOSE_get_by_id(id);
92 pt = X509_PURPOSE_get0(idx);
93 return pt->check_purpose(pt, x, ca);
96 int X509_PURPOSE_set(int *p, int purpose)
98 if (X509_PURPOSE_get_by_id(purpose) == -1) {
99 X509V3err(X509V3_F_X509_PURPOSE_SET, X509V3_R_INVALID_PURPOSE);
106 int X509_PURPOSE_get_count(void)
109 return X509_PURPOSE_COUNT;
110 return sk_X509_PURPOSE_num(xptable) + X509_PURPOSE_COUNT;
113 X509_PURPOSE *X509_PURPOSE_get0(int idx)
117 if (idx < (int)X509_PURPOSE_COUNT)
118 return xstandard + idx;
119 return sk_X509_PURPOSE_value(xptable, idx - X509_PURPOSE_COUNT);
122 int X509_PURPOSE_get_by_sname(char *sname)
126 for (i = 0; i < X509_PURPOSE_get_count(); i++) {
127 xptmp = X509_PURPOSE_get0(i);
128 if (strcmp(xptmp->sname, sname) == 0)
134 int X509_PURPOSE_get_by_id(int purpose)
138 if ((purpose >= X509_PURPOSE_MIN) && (purpose <= X509_PURPOSE_MAX))
139 return purpose - X509_PURPOSE_MIN;
140 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 char *name, 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 static void xptable_free(X509_PURPOSE *p)
214 if (p->flags & X509_PURPOSE_DYNAMIC) {
215 if (p->flags & X509_PURPOSE_DYNAMIC_NAME) {
216 OPENSSL_free(p->name);
217 OPENSSL_free(p->sname);
223 void X509_PURPOSE_cleanup(void)
226 sk_X509_PURPOSE_pop_free(xptable, xptable_free);
227 for (i = 0; i < X509_PURPOSE_COUNT; i++)
228 xptable_free(xstandard + i);
232 int X509_PURPOSE_get_id(X509_PURPOSE *xp)
237 char *X509_PURPOSE_get0_name(X509_PURPOSE *xp)
242 char *X509_PURPOSE_get0_sname(X509_PURPOSE *xp)
247 int X509_PURPOSE_get_trust(X509_PURPOSE *xp)
252 static int nid_cmp(const int *a, const int *b)
257 DECLARE_OBJ_BSEARCH_CMP_FN(int, int, nid);
258 IMPLEMENT_OBJ_BSEARCH_CMP_FN(int, int, nid);
260 int X509_supported_extension(X509_EXTENSION *ex)
263 * This table is a list of the NIDs of supported extensions: that is
264 * those which are used by the verify process. If an extension is
265 * critical and doesn't appear in this list then the verify process will
266 * normally reject the certificate. The list must be kept in numerical
267 * order because it will be searched using bsearch.
270 static const int supported_nids[] = {
271 NID_netscape_cert_type, /* 71 */
272 NID_key_usage, /* 83 */
273 NID_subject_alt_name, /* 85 */
274 NID_basic_constraints, /* 87 */
275 NID_certificate_policies, /* 89 */
276 NID_ext_key_usage, /* 126 */
277 #ifndef OPENSSL_NO_RFC3779
278 NID_sbgp_ipAddrBlock, /* 290 */
279 NID_sbgp_autonomousSysNum, /* 291 */
281 NID_policy_constraints, /* 401 */
282 NID_proxyCertInfo, /* 663 */
283 NID_name_constraints, /* 666 */
284 NID_policy_mappings, /* 747 */
285 NID_inhibit_any_policy /* 748 */
288 int ex_nid = OBJ_obj2nid(X509_EXTENSION_get_object(ex));
290 if (ex_nid == NID_undef)
293 if (OBJ_bsearch_nid(&ex_nid, supported_nids, OSSL_NELEM(supported_nids)))
298 static void setup_dp(X509 *x, DIST_POINT *dp)
300 X509_NAME *iname = NULL;
303 if (dp->reasons->length > 0)
304 dp->dp_reasons = dp->reasons->data[0];
305 if (dp->reasons->length > 1)
306 dp->dp_reasons |= (dp->reasons->data[1] << 8);
307 dp->dp_reasons &= CRLDP_ALL_REASONS;
309 dp->dp_reasons = CRLDP_ALL_REASONS;
310 if (!dp->distpoint || (dp->distpoint->type != 1))
312 for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++) {
313 GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
314 if (gen->type == GEN_DIRNAME) {
315 iname = gen->d.directoryName;
320 iname = X509_get_issuer_name(x);
322 DIST_POINT_set_dpname(dp->distpoint, iname);
326 static void setup_crldp(X509 *x)
329 x->crldp = X509_get_ext_d2i(x, NID_crl_distribution_points, NULL, NULL);
330 for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
331 setup_dp(x, sk_DIST_POINT_value(x->crldp, i));
334 #define V1_ROOT (EXFLAG_V1|EXFLAG_SS)
335 #define ku_reject(x, usage) \
336 (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
337 #define xku_reject(x, usage) \
338 (((x)->ex_flags & EXFLAG_XKUSAGE) && !((x)->ex_xkusage & (usage)))
339 #define ns_reject(x, usage) \
340 (((x)->ex_flags & EXFLAG_NSCERT) && !((x)->ex_nscert & (usage)))
342 static void x509v3_cache_extensions(X509 *x)
344 BASIC_CONSTRAINTS *bs;
345 PROXY_CERT_INFO_EXTENSION *pci;
346 ASN1_BIT_STRING *usage;
348 EXTENDED_KEY_USAGE *extusage;
352 if (x->ex_flags & EXFLAG_SET)
354 X509_digest(x, EVP_sha1(), x->sha1_hash, NULL);
355 /* V1 should mean no extensions ... */
356 if (!X509_get_version(x))
357 x->ex_flags |= EXFLAG_V1;
358 /* Handle basic constraints */
359 if ((bs = X509_get_ext_d2i(x, NID_basic_constraints, NULL, NULL))) {
361 x->ex_flags |= EXFLAG_CA;
363 if ((bs->pathlen->type == V_ASN1_NEG_INTEGER)
365 x->ex_flags |= EXFLAG_INVALID;
368 x->ex_pathlen = ASN1_INTEGER_get(bs->pathlen);
371 BASIC_CONSTRAINTS_free(bs);
372 x->ex_flags |= EXFLAG_BCONS;
374 /* Handle proxy certificates */
375 if ((pci = X509_get_ext_d2i(x, NID_proxyCertInfo, NULL, NULL))) {
376 if (x->ex_flags & EXFLAG_CA
377 || X509_get_ext_by_NID(x, NID_subject_alt_name, -1) >= 0
378 || X509_get_ext_by_NID(x, NID_issuer_alt_name, -1) >= 0) {
379 x->ex_flags |= EXFLAG_INVALID;
381 if (pci->pcPathLengthConstraint) {
382 x->ex_pcpathlen = ASN1_INTEGER_get(pci->pcPathLengthConstraint);
384 x->ex_pcpathlen = -1;
385 PROXY_CERT_INFO_EXTENSION_free(pci);
386 x->ex_flags |= EXFLAG_PROXY;
388 /* Handle key usage */
389 if ((usage = X509_get_ext_d2i(x, NID_key_usage, NULL, NULL))) {
390 if (usage->length > 0) {
391 x->ex_kusage = usage->data[0];
392 if (usage->length > 1)
393 x->ex_kusage |= usage->data[1] << 8;
396 x->ex_flags |= EXFLAG_KUSAGE;
397 ASN1_BIT_STRING_free(usage);
400 if ((extusage = X509_get_ext_d2i(x, NID_ext_key_usage, NULL, NULL))) {
401 x->ex_flags |= EXFLAG_XKUSAGE;
402 for (i = 0; i < sk_ASN1_OBJECT_num(extusage); i++) {
403 switch (OBJ_obj2nid(sk_ASN1_OBJECT_value(extusage, i))) {
404 case NID_server_auth:
405 x->ex_xkusage |= XKU_SSL_SERVER;
408 case NID_client_auth:
409 x->ex_xkusage |= XKU_SSL_CLIENT;
412 case NID_email_protect:
413 x->ex_xkusage |= XKU_SMIME;
417 x->ex_xkusage |= XKU_CODE_SIGN;
422 x->ex_xkusage |= XKU_SGC;
426 x->ex_xkusage |= XKU_OCSP_SIGN;
430 x->ex_xkusage |= XKU_TIMESTAMP;
434 x->ex_xkusage |= XKU_DVCS;
437 case NID_anyExtendedKeyUsage:
438 x->ex_xkusage |= XKU_ANYEKU;
442 sk_ASN1_OBJECT_pop_free(extusage, ASN1_OBJECT_free);
445 if ((ns = X509_get_ext_d2i(x, NID_netscape_cert_type, NULL, NULL))) {
447 x->ex_nscert = ns->data[0];
450 x->ex_flags |= EXFLAG_NSCERT;
451 ASN1_BIT_STRING_free(ns);
453 x->skid = X509_get_ext_d2i(x, NID_subject_key_identifier, NULL, NULL);
454 x->akid = X509_get_ext_d2i(x, NID_authority_key_identifier, NULL, NULL);
455 /* Does subject name match issuer ? */
456 if (!X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x))) {
457 x->ex_flags |= EXFLAG_SI;
458 /* If SKID matches AKID also indicate self signed */
459 if (X509_check_akid(x, x->akid) == X509_V_OK &&
460 !ku_reject(x, KU_KEY_CERT_SIGN))
461 x->ex_flags |= EXFLAG_SS;
463 x->altname = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
464 x->nc = X509_get_ext_d2i(x, NID_name_constraints, &i, NULL);
465 if (!x->nc && (i != -1))
466 x->ex_flags |= EXFLAG_INVALID;
469 #ifndef OPENSSL_NO_RFC3779
470 x->rfc3779_addr = X509_get_ext_d2i(x, NID_sbgp_ipAddrBlock, NULL, NULL);
471 x->rfc3779_asid = X509_get_ext_d2i(x, NID_sbgp_autonomousSysNum,
474 for (i = 0; i < X509_get_ext_count(x); i++) {
475 ex = X509_get_ext(x, i);
476 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex))
478 x->ex_flags |= EXFLAG_FRESHEST;
479 if (!X509_EXTENSION_get_critical(ex))
481 if (!X509_supported_extension(ex)) {
482 x->ex_flags |= EXFLAG_CRITICAL;
486 x->ex_flags |= EXFLAG_SET;
490 * CA checks common to all purposes
494 * 2 basicConstraints absent so "maybe" a CA
495 * 3 basicConstraints absent but self signed V1.
496 * 4 basicConstraints absent but keyUsage present and keyCertSign asserted.
499 static int check_ca(const X509 *x)
501 /* keyUsage if present should allow cert signing */
502 if (ku_reject(x, KU_KEY_CERT_SIGN))
504 if (x->ex_flags & EXFLAG_BCONS) {
505 if (x->ex_flags & EXFLAG_CA)
507 /* If basicConstraints says not a CA then say so */
511 /* we support V1 roots for... uh, I don't really know why. */
512 if ((x->ex_flags & V1_ROOT) == V1_ROOT)
515 * If key usage present it must have certSign so tolerate it
517 else if (x->ex_flags & EXFLAG_KUSAGE)
519 /* Older certificates could have Netscape-specific CA types */
520 else if (x->ex_flags & EXFLAG_NSCERT && x->ex_nscert & NS_ANY_CA)
522 /* can this still be regarded a CA certificate? I doubt it */
527 int X509_check_ca(X509 *x)
529 if (!(x->ex_flags & EXFLAG_SET)) {
530 CRYPTO_THREAD_write_lock(x->lock);
531 x509v3_cache_extensions(x);
532 CRYPTO_THREAD_unlock(x->lock);
538 /* Check SSL CA: common checks for SSL client and server */
539 static int check_ssl_ca(const X509 *x)
542 ca_ret = check_ca(x);
545 /* check nsCertType if present */
546 if (ca_ret != 5 || x->ex_nscert & NS_SSL_CA)
552 static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
555 if (xku_reject(x, XKU_SSL_CLIENT))
558 return check_ssl_ca(x);
559 /* We need to do digital signatures or key agreement */
560 if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_KEY_AGREEMENT))
562 /* nsCertType if present should allow SSL client use */
563 if (ns_reject(x, NS_SSL_CLIENT))
569 * Key usage needed for TLS/SSL server: digital signature, encipherment or
570 * key agreement. The ssl code can check this more thoroughly for individual
574 KU_DIGITAL_SIGNATURE|KU_KEY_ENCIPHERMENT|KU_KEY_AGREEMENT
576 static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
579 if (xku_reject(x, XKU_SSL_SERVER | XKU_SGC))
582 return check_ssl_ca(x);
584 if (ns_reject(x, NS_SSL_SERVER))
586 if (ku_reject(x, KU_TLS))
593 static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
597 ret = check_purpose_ssl_server(xp, x, ca);
600 /* We need to encipher or Netscape complains */
601 if (ku_reject(x, KU_KEY_ENCIPHERMENT))
606 /* common S/MIME checks */
607 static int purpose_smime(const X509 *x, int ca)
609 if (xku_reject(x, XKU_SMIME))
613 ca_ret = check_ca(x);
616 /* check nsCertType if present */
617 if (ca_ret != 5 || x->ex_nscert & NS_SMIME_CA)
622 if (x->ex_flags & EXFLAG_NSCERT) {
623 if (x->ex_nscert & NS_SMIME)
625 /* Workaround for some buggy certificates */
626 if (x->ex_nscert & NS_SSL_CLIENT)
633 static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
637 ret = purpose_smime(x, ca);
640 if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_NON_REPUDIATION))
645 static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
649 ret = purpose_smime(x, ca);
652 if (ku_reject(x, KU_KEY_ENCIPHERMENT))
657 static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
662 if ((ca_ret = check_ca(x)) != 2)
667 if (ku_reject(x, KU_CRL_SIGN))
673 * OCSP helper: this is *not* a full OCSP check. It just checks that each CA
674 * is valid. Additional checks must be made on the chain.
677 static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca)
680 * Must be a valid CA. Should we really support the "I don't know" value
685 /* leaf certificate is checked in OCSP_verify() */
689 static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
694 /* If ca is true we must return if this is a valid CA certificate. */
699 * Check the optional key usage field:
700 * if Key Usage is present, it must be one of digitalSignature
701 * and/or nonRepudiation (other values are not consistent and shall
704 if ((x->ex_flags & EXFLAG_KUSAGE)
705 && ((x->ex_kusage & ~(KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE)) ||
706 !(x->ex_kusage & (KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE))))
709 /* Only time stamp key usage is permitted and it's required. */
710 if (!(x->ex_flags & EXFLAG_XKUSAGE) || x->ex_xkusage != XKU_TIMESTAMP)
713 /* Extended Key Usage MUST be critical */
714 i_ext = X509_get_ext_by_NID((X509 *)x, NID_ext_key_usage, -1);
716 X509_EXTENSION *ext = X509_get_ext((X509 *)x, i_ext);
717 if (!X509_EXTENSION_get_critical(ext))
724 static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca)
730 * Various checks to see if one certificate issued the second.
731 * This can be used to prune a set of possible issuer certificates
732 * which have been looked up using some simple method such as by
735 * 1. Check issuer_name(subject) == subject_name(issuer)
736 * 2. If akid(subject) exists check it matches issuer
737 * 3. If key_usage(issuer) exists check it supports certificate signing
738 * returns 0 for OK, positive for reason for mismatch, reasons match
739 * codes for X509_verify_cert()
742 int X509_check_issued(X509 *issuer, X509 *subject)
744 if (X509_NAME_cmp(X509_get_subject_name(issuer),
745 X509_get_issuer_name(subject)))
746 return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
747 x509v3_cache_extensions(issuer);
748 x509v3_cache_extensions(subject);
751 int ret = X509_check_akid(issuer, subject->akid);
752 if (ret != X509_V_OK)
756 if (subject->ex_flags & EXFLAG_PROXY) {
757 if (ku_reject(issuer, KU_DIGITAL_SIGNATURE))
758 return X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE;
759 } else if (ku_reject(issuer, KU_KEY_CERT_SIGN))
760 return X509_V_ERR_KEYUSAGE_NO_CERTSIGN;
764 int X509_check_akid(X509 *issuer, AUTHORITY_KEYID *akid)
770 /* Check key ids (if present) */
771 if (akid->keyid && issuer->skid &&
772 ASN1_OCTET_STRING_cmp(akid->keyid, issuer->skid))
773 return X509_V_ERR_AKID_SKID_MISMATCH;
774 /* Check serial number */
776 ASN1_INTEGER_cmp(X509_get_serialNumber(issuer), akid->serial))
777 return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
778 /* Check issuer name */
781 * Ugh, for some peculiar reason AKID includes SEQUENCE OF
782 * GeneralName. So look for a DirName. There may be more than one but
783 * we only take any notice of the first.
787 X509_NAME *nm = NULL;
790 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
791 gen = sk_GENERAL_NAME_value(gens, i);
792 if (gen->type == GEN_DIRNAME) {
797 if (nm && X509_NAME_cmp(nm, X509_get_issuer_name(issuer)))
798 return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
803 uint32_t X509_get_extension_flags(X509 *x)
805 /* Call for side-effect of computing hash and caching extensions */
806 X509_check_purpose(x, -1, -1);
810 uint32_t X509_get_key_usage(X509 *x)
812 /* Call for side-effect of computing hash and caching extensions */
813 X509_check_purpose(x, -1, -1);
814 if (x->ex_flags & EXFLAG_KUSAGE)
819 uint32_t X509_get_extended_key_usage(X509 *x)
821 /* Call for side-effect of computing hash and caching extensions */
822 X509_check_purpose(x, -1, -1);
823 if (x->ex_flags & EXFLAG_XKUSAGE)
824 return x->ex_xkusage;
828 const ASN1_OCTET_STRING *X509_get0_subject_key_id(X509 *x)
830 /* Call for side-effect of computing hash and caching extensions */
831 X509_check_purpose(x, -1, -1);