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"
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;
82 x509v3_cache_extensions(x);
84 /* Return if side-effect only call */
87 idx = X509_PURPOSE_get_by_id(id);
90 pt = X509_PURPOSE_get0(idx);
91 return pt->check_purpose(pt, x, ca);
94 int X509_PURPOSE_set(int *p, int purpose)
96 if (X509_PURPOSE_get_by_id(purpose) == -1) {
97 X509V3err(X509V3_F_X509_PURPOSE_SET, X509V3_R_INVALID_PURPOSE);
104 int X509_PURPOSE_get_count(void)
107 return X509_PURPOSE_COUNT;
108 return sk_X509_PURPOSE_num(xptable) + X509_PURPOSE_COUNT;
111 X509_PURPOSE *X509_PURPOSE_get0(int idx)
115 if (idx < (int)X509_PURPOSE_COUNT)
116 return xstandard + idx;
117 return sk_X509_PURPOSE_value(xptable, idx - X509_PURPOSE_COUNT);
120 int X509_PURPOSE_get_by_sname(const char *sname)
124 for (i = 0; i < X509_PURPOSE_get_count(); i++) {
125 xptmp = X509_PURPOSE_get0(i);
126 if (strcmp(xptmp->sname, sname) == 0)
132 int X509_PURPOSE_get_by_id(int purpose)
136 if ((purpose >= X509_PURPOSE_MIN) && (purpose <= X509_PURPOSE_MAX))
137 return purpose - X509_PURPOSE_MIN;
138 tmp.purpose = purpose;
141 idx = sk_X509_PURPOSE_find(xptable, &tmp);
144 return idx + X509_PURPOSE_COUNT;
147 int X509_PURPOSE_add(int id, int trust, int flags,
148 int (*ck) (const X509_PURPOSE *, const X509 *, int),
149 const char *name, const char *sname, void *arg)
154 * This is set according to what we change: application can't set it
156 flags &= ~X509_PURPOSE_DYNAMIC;
157 /* This will always be set for application modified trust entries */
158 flags |= X509_PURPOSE_DYNAMIC_NAME;
159 /* Get existing entry if any */
160 idx = X509_PURPOSE_get_by_id(id);
161 /* Need a new entry */
163 if ((ptmp = OPENSSL_malloc(sizeof(*ptmp))) == NULL) {
164 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
167 ptmp->flags = X509_PURPOSE_DYNAMIC;
169 ptmp = X509_PURPOSE_get0(idx);
171 /* OPENSSL_free existing name if dynamic */
172 if (ptmp->flags & X509_PURPOSE_DYNAMIC_NAME) {
173 OPENSSL_free(ptmp->name);
174 OPENSSL_free(ptmp->sname);
176 /* dup supplied name */
177 ptmp->name = OPENSSL_strdup(name);
178 ptmp->sname = OPENSSL_strdup(sname);
179 if (!ptmp->name || !ptmp->sname) {
180 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
183 /* Keep the dynamic flag of existing entry */
184 ptmp->flags &= X509_PURPOSE_DYNAMIC;
185 /* Set all other flags */
186 ptmp->flags |= flags;
190 ptmp->check_purpose = ck;
191 ptmp->usr_data = arg;
193 /* If its a new entry manage the dynamic table */
196 && (xptable = sk_X509_PURPOSE_new(xp_cmp)) == NULL) {
197 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
200 if (!sk_X509_PURPOSE_push(xptable, ptmp)) {
201 X509V3err(X509V3_F_X509_PURPOSE_ADD, ERR_R_MALLOC_FAILURE);
208 OPENSSL_free(ptmp->name);
209 OPENSSL_free(ptmp->sname);
215 static void xptable_free(X509_PURPOSE *p)
219 if (p->flags & X509_PURPOSE_DYNAMIC) {
220 if (p->flags & X509_PURPOSE_DYNAMIC_NAME) {
221 OPENSSL_free(p->name);
222 OPENSSL_free(p->sname);
228 void X509_PURPOSE_cleanup(void)
230 sk_X509_PURPOSE_pop_free(xptable, xptable_free);
234 int X509_PURPOSE_get_id(const X509_PURPOSE *xp)
239 char *X509_PURPOSE_get0_name(const X509_PURPOSE *xp)
244 char *X509_PURPOSE_get0_sname(const X509_PURPOSE *xp)
249 int X509_PURPOSE_get_trust(const X509_PURPOSE *xp)
254 static int nid_cmp(const int *a, const int *b)
259 DECLARE_OBJ_BSEARCH_CMP_FN(int, int, nid);
260 IMPLEMENT_OBJ_BSEARCH_CMP_FN(int, int, nid);
262 int X509_supported_extension(X509_EXTENSION *ex)
265 * This table is a list of the NIDs of supported extensions: that is
266 * those which are used by the verify process. If an extension is
267 * critical and doesn't appear in this list then the verify process will
268 * normally reject the certificate. The list must be kept in numerical
269 * order because it will be searched using bsearch.
272 static const int supported_nids[] = {
273 NID_netscape_cert_type, /* 71 */
274 NID_key_usage, /* 83 */
275 NID_subject_alt_name, /* 85 */
276 NID_basic_constraints, /* 87 */
277 NID_certificate_policies, /* 89 */
278 NID_crl_distribution_points, /* 103 */
279 NID_ext_key_usage, /* 126 */
280 #ifndef OPENSSL_NO_RFC3779
281 NID_sbgp_ipAddrBlock, /* 290 */
282 NID_sbgp_autonomousSysNum, /* 291 */
284 NID_policy_constraints, /* 401 */
285 NID_proxyCertInfo, /* 663 */
286 NID_name_constraints, /* 666 */
287 NID_policy_mappings, /* 747 */
288 NID_inhibit_any_policy /* 748 */
291 int ex_nid = OBJ_obj2nid(X509_EXTENSION_get_object(ex));
293 if (ex_nid == NID_undef)
296 if (OBJ_bsearch_nid(&ex_nid, supported_nids, OSSL_NELEM(supported_nids)))
301 static void setup_dp(X509 *x, DIST_POINT *dp)
303 X509_NAME *iname = NULL;
306 if (dp->reasons->length > 0)
307 dp->dp_reasons = dp->reasons->data[0];
308 if (dp->reasons->length > 1)
309 dp->dp_reasons |= (dp->reasons->data[1] << 8);
310 dp->dp_reasons &= CRLDP_ALL_REASONS;
312 dp->dp_reasons = CRLDP_ALL_REASONS;
313 if (!dp->distpoint || (dp->distpoint->type != 1))
315 for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++) {
316 GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
317 if (gen->type == GEN_DIRNAME) {
318 iname = gen->d.directoryName;
323 iname = X509_get_issuer_name(x);
325 DIST_POINT_set_dpname(dp->distpoint, iname);
329 static void setup_crldp(X509 *x)
332 x->crldp = X509_get_ext_d2i(x, NID_crl_distribution_points, NULL, NULL);
333 for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
334 setup_dp(x, sk_DIST_POINT_value(x->crldp, i));
337 #define V1_ROOT (EXFLAG_V1|EXFLAG_SS)
338 #define ku_reject(x, usage) \
339 (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
340 #define xku_reject(x, usage) \
341 (((x)->ex_flags & EXFLAG_XKUSAGE) && !((x)->ex_xkusage & (usage)))
342 #define ns_reject(x, usage) \
343 (((x)->ex_flags & EXFLAG_NSCERT) && !((x)->ex_nscert & (usage)))
345 static void x509v3_cache_extensions(X509 *x)
347 BASIC_CONSTRAINTS *bs;
348 PROXY_CERT_INFO_EXTENSION *pci;
349 ASN1_BIT_STRING *usage;
351 EXTENDED_KEY_USAGE *extusage;
356 if (x->ex_flags & EXFLAG_SET)
359 CRYPTO_THREAD_write_lock(x->lock);
360 if (x->ex_flags & EXFLAG_SET) {
361 CRYPTO_THREAD_unlock(x->lock);
365 X509_digest(x, EVP_sha1(), x->sha1_hash, NULL);
366 /* V1 should mean no extensions ... */
367 if (!X509_get_version(x))
368 x->ex_flags |= EXFLAG_V1;
369 /* Handle basic constraints */
370 if ((bs = X509_get_ext_d2i(x, NID_basic_constraints, NULL, NULL))) {
372 x->ex_flags |= EXFLAG_CA;
374 if ((bs->pathlen->type == V_ASN1_NEG_INTEGER)
376 x->ex_flags |= EXFLAG_INVALID;
379 x->ex_pathlen = ASN1_INTEGER_get(bs->pathlen);
382 BASIC_CONSTRAINTS_free(bs);
383 x->ex_flags |= EXFLAG_BCONS;
385 /* Handle proxy certificates */
386 if ((pci = X509_get_ext_d2i(x, NID_proxyCertInfo, NULL, NULL))) {
387 if (x->ex_flags & EXFLAG_CA
388 || X509_get_ext_by_NID(x, NID_subject_alt_name, -1) >= 0
389 || X509_get_ext_by_NID(x, NID_issuer_alt_name, -1) >= 0) {
390 x->ex_flags |= EXFLAG_INVALID;
392 if (pci->pcPathLengthConstraint) {
393 x->ex_pcpathlen = ASN1_INTEGER_get(pci->pcPathLengthConstraint);
395 x->ex_pcpathlen = -1;
396 PROXY_CERT_INFO_EXTENSION_free(pci);
397 x->ex_flags |= EXFLAG_PROXY;
399 /* Handle key usage */
400 if ((usage = X509_get_ext_d2i(x, NID_key_usage, NULL, NULL))) {
401 if (usage->length > 0) {
402 x->ex_kusage = usage->data[0];
403 if (usage->length > 1)
404 x->ex_kusage |= usage->data[1] << 8;
407 x->ex_flags |= EXFLAG_KUSAGE;
408 ASN1_BIT_STRING_free(usage);
411 if ((extusage = X509_get_ext_d2i(x, NID_ext_key_usage, NULL, NULL))) {
412 x->ex_flags |= EXFLAG_XKUSAGE;
413 for (i = 0; i < sk_ASN1_OBJECT_num(extusage); i++) {
414 switch (OBJ_obj2nid(sk_ASN1_OBJECT_value(extusage, i))) {
415 case NID_server_auth:
416 x->ex_xkusage |= XKU_SSL_SERVER;
419 case NID_client_auth:
420 x->ex_xkusage |= XKU_SSL_CLIENT;
423 case NID_email_protect:
424 x->ex_xkusage |= XKU_SMIME;
428 x->ex_xkusage |= XKU_CODE_SIGN;
433 x->ex_xkusage |= XKU_SGC;
437 x->ex_xkusage |= XKU_OCSP_SIGN;
441 x->ex_xkusage |= XKU_TIMESTAMP;
445 x->ex_xkusage |= XKU_DVCS;
448 case NID_anyExtendedKeyUsage:
449 x->ex_xkusage |= XKU_ANYEKU;
453 sk_ASN1_OBJECT_pop_free(extusage, ASN1_OBJECT_free);
456 if ((ns = X509_get_ext_d2i(x, NID_netscape_cert_type, NULL, NULL))) {
458 x->ex_nscert = ns->data[0];
461 x->ex_flags |= EXFLAG_NSCERT;
462 ASN1_BIT_STRING_free(ns);
464 x->skid = X509_get_ext_d2i(x, NID_subject_key_identifier, NULL, NULL);
465 x->akid = X509_get_ext_d2i(x, NID_authority_key_identifier, NULL, NULL);
466 /* Does subject name match issuer ? */
467 if (!X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x))) {
468 x->ex_flags |= EXFLAG_SI;
469 /* If SKID matches AKID also indicate self signed */
470 if (X509_check_akid(x, x->akid) == X509_V_OK &&
471 !ku_reject(x, KU_KEY_CERT_SIGN))
472 x->ex_flags |= EXFLAG_SS;
474 x->altname = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
475 x->nc = X509_get_ext_d2i(x, NID_name_constraints, &i, NULL);
476 if (!x->nc && (i != -1))
477 x->ex_flags |= EXFLAG_INVALID;
480 #ifndef OPENSSL_NO_RFC3779
481 x->rfc3779_addr = X509_get_ext_d2i(x, NID_sbgp_ipAddrBlock, NULL, NULL);
482 x->rfc3779_asid = X509_get_ext_d2i(x, NID_sbgp_autonomousSysNum,
485 for (i = 0; i < X509_get_ext_count(x); i++) {
486 ex = X509_get_ext(x, i);
487 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex))
489 x->ex_flags |= EXFLAG_FRESHEST;
490 if (!X509_EXTENSION_get_critical(ex))
492 if (!X509_supported_extension(ex)) {
493 x->ex_flags |= EXFLAG_CRITICAL;
497 x509_init_sig_info(x);
498 x->ex_flags |= EXFLAG_SET;
499 CRYPTO_THREAD_unlock(x->lock);
503 * CA checks common to all purposes
507 * 2 basicConstraints absent so "maybe" a CA
508 * 3 basicConstraints absent but self signed V1.
509 * 4 basicConstraints absent but keyUsage present and keyCertSign asserted.
512 static int check_ca(const X509 *x)
514 /* keyUsage if present should allow cert signing */
515 if (ku_reject(x, KU_KEY_CERT_SIGN))
517 if (x->ex_flags & EXFLAG_BCONS) {
518 if (x->ex_flags & EXFLAG_CA)
520 /* If basicConstraints says not a CA then say so */
524 /* we support V1 roots for... uh, I don't really know why. */
525 if ((x->ex_flags & V1_ROOT) == V1_ROOT)
528 * If key usage present it must have certSign so tolerate it
530 else if (x->ex_flags & EXFLAG_KUSAGE)
532 /* Older certificates could have Netscape-specific CA types */
533 else if (x->ex_flags & EXFLAG_NSCERT && x->ex_nscert & NS_ANY_CA)
535 /* can this still be regarded a CA certificate? I doubt it */
540 void X509_set_proxy_flag(X509 *x)
542 x->ex_flags |= EXFLAG_PROXY;
545 void X509_set_proxy_pathlen(X509 *x, long l)
550 int X509_check_ca(X509 *x)
552 x509v3_cache_extensions(x);
557 /* Check SSL CA: common checks for SSL client and server */
558 static int check_ssl_ca(const X509 *x)
561 ca_ret = check_ca(x);
564 /* check nsCertType if present */
565 if (ca_ret != 5 || x->ex_nscert & NS_SSL_CA)
571 static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
574 if (xku_reject(x, XKU_SSL_CLIENT))
577 return check_ssl_ca(x);
578 /* We need to do digital signatures or key agreement */
579 if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_KEY_AGREEMENT))
581 /* nsCertType if present should allow SSL client use */
582 if (ns_reject(x, NS_SSL_CLIENT))
588 * Key usage needed for TLS/SSL server: digital signature, encipherment or
589 * key agreement. The ssl code can check this more thoroughly for individual
593 KU_DIGITAL_SIGNATURE|KU_KEY_ENCIPHERMENT|KU_KEY_AGREEMENT
595 static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
598 if (xku_reject(x, XKU_SSL_SERVER | XKU_SGC))
601 return check_ssl_ca(x);
603 if (ns_reject(x, NS_SSL_SERVER))
605 if (ku_reject(x, KU_TLS))
612 static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
616 ret = check_purpose_ssl_server(xp, x, ca);
619 /* We need to encipher or Netscape complains */
620 if (ku_reject(x, KU_KEY_ENCIPHERMENT))
625 /* common S/MIME checks */
626 static int purpose_smime(const X509 *x, int ca)
628 if (xku_reject(x, XKU_SMIME))
632 ca_ret = check_ca(x);
635 /* check nsCertType if present */
636 if (ca_ret != 5 || x->ex_nscert & NS_SMIME_CA)
641 if (x->ex_flags & EXFLAG_NSCERT) {
642 if (x->ex_nscert & NS_SMIME)
644 /* Workaround for some buggy certificates */
645 if (x->ex_nscert & NS_SSL_CLIENT)
652 static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
656 ret = purpose_smime(x, ca);
659 if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_NON_REPUDIATION))
664 static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
668 ret = purpose_smime(x, ca);
671 if (ku_reject(x, KU_KEY_ENCIPHERMENT))
676 static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
681 if ((ca_ret = check_ca(x)) != 2)
686 if (ku_reject(x, KU_CRL_SIGN))
692 * OCSP helper: this is *not* a full OCSP check. It just checks that each CA
693 * is valid. Additional checks must be made on the chain.
696 static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca)
699 * Must be a valid CA. Should we really support the "I don't know" value
704 /* leaf certificate is checked in OCSP_verify() */
708 static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
713 /* If ca is true we must return if this is a valid CA certificate. */
718 * Check the optional key usage field:
719 * if Key Usage is present, it must be one of digitalSignature
720 * and/or nonRepudiation (other values are not consistent and shall
723 if ((x->ex_flags & EXFLAG_KUSAGE)
724 && ((x->ex_kusage & ~(KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE)) ||
725 !(x->ex_kusage & (KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE))))
728 /* Only time stamp key usage is permitted and it's required. */
729 if (!(x->ex_flags & EXFLAG_XKUSAGE) || x->ex_xkusage != XKU_TIMESTAMP)
732 /* Extended Key Usage MUST be critical */
733 i_ext = X509_get_ext_by_NID(x, NID_ext_key_usage, -1);
735 X509_EXTENSION *ext = X509_get_ext((X509 *)x, i_ext);
736 if (!X509_EXTENSION_get_critical(ext))
743 static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca)
749 * Various checks to see if one certificate issued the second.
750 * This can be used to prune a set of possible issuer certificates
751 * which have been looked up using some simple method such as by
754 * 1. Check issuer_name(subject) == subject_name(issuer)
755 * 2. If akid(subject) exists check it matches issuer
756 * 3. If key_usage(issuer) exists check it supports certificate signing
757 * returns 0 for OK, positive for reason for mismatch, reasons match
758 * codes for X509_verify_cert()
761 int X509_check_issued(X509 *issuer, X509 *subject)
763 if (X509_NAME_cmp(X509_get_subject_name(issuer),
764 X509_get_issuer_name(subject)))
765 return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
767 x509v3_cache_extensions(issuer);
768 x509v3_cache_extensions(subject);
771 int ret = X509_check_akid(issuer, subject->akid);
772 if (ret != X509_V_OK)
776 if (subject->ex_flags & EXFLAG_PROXY) {
777 if (ku_reject(issuer, KU_DIGITAL_SIGNATURE))
778 return X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE;
779 } else if (ku_reject(issuer, KU_KEY_CERT_SIGN))
780 return X509_V_ERR_KEYUSAGE_NO_CERTSIGN;
784 int X509_check_akid(X509 *issuer, AUTHORITY_KEYID *akid)
790 /* Check key ids (if present) */
791 if (akid->keyid && issuer->skid &&
792 ASN1_OCTET_STRING_cmp(akid->keyid, issuer->skid))
793 return X509_V_ERR_AKID_SKID_MISMATCH;
794 /* Check serial number */
796 ASN1_INTEGER_cmp(X509_get_serialNumber(issuer), akid->serial))
797 return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
798 /* Check issuer name */
801 * Ugh, for some peculiar reason AKID includes SEQUENCE OF
802 * GeneralName. So look for a DirName. There may be more than one but
803 * we only take any notice of the first.
807 X509_NAME *nm = NULL;
810 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
811 gen = sk_GENERAL_NAME_value(gens, i);
812 if (gen->type == GEN_DIRNAME) {
817 if (nm && X509_NAME_cmp(nm, X509_get_issuer_name(issuer)))
818 return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
823 uint32_t X509_get_extension_flags(X509 *x)
825 /* Call for side-effect of computing hash and caching extensions */
826 X509_check_purpose(x, -1, -1);
830 uint32_t X509_get_key_usage(X509 *x)
832 /* Call for side-effect of computing hash and caching extensions */
833 X509_check_purpose(x, -1, -1);
834 if (x->ex_flags & EXFLAG_KUSAGE)
839 uint32_t X509_get_extended_key_usage(X509 *x)
841 /* Call for side-effect of computing hash and caching extensions */
842 X509_check_purpose(x, -1, -1);
843 if (x->ex_flags & EXFLAG_XKUSAGE)
844 return x->ex_xkusage;
848 const ASN1_OCTET_STRING *X509_get0_subject_key_id(X509 *x)
850 /* Call for side-effect of computing hash and caching extensions */
851 X509_check_purpose(x, -1, -1);
855 const ASN1_OCTET_STRING *X509_get0_authority_key_id(X509 *x)
857 /* Call for side-effect of computing hash and caching extensions */
858 X509_check_purpose(x, -1, -1);
859 return (x->akid != NULL ? x->akid->keyid : NULL);
862 long X509_get_pathlen(X509 *x)
864 /* Called for side effect of caching extensions */
865 if (X509_check_purpose(x, -1, -1) != 1
866 || (x->ex_flags & EXFLAG_BCONS) == 0)
868 return x->ex_pathlen;
871 long X509_get_proxy_pathlen(X509 *x)
873 /* Called for side effect of caching extensions */
874 if (X509_check_purpose(x, -1, -1) != 1
875 || (x->ex_flags & EXFLAG_PROXY) == 0)
877 return x->ex_pcpathlen;