Revert "and added files"
[bcm963xx.git] / userapps / opensource / openssl / crypto / x509v3 / v3_purp.c
diff --git a/userapps/opensource/openssl/crypto/x509v3/v3_purp.c b/userapps/opensource/openssl/crypto/x509v3/v3_purp.c
deleted file mode 100755 (executable)
index 3e94f77..0000000
+++ /dev/null
@@ -1,629 +0,0 @@
-/* v3_purp.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 2001.
- */
-/* ====================================================================
- * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include <stdio.h>
-#include "cryptlib.h"
-#include <openssl/x509v3.h>
-#include <openssl/x509_vfy.h>
-
-static void x509v3_cache_extensions(X509 *x);
-
-static int check_ssl_ca(const X509 *x);
-static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int purpose_smime(const X509 *x, int ca);
-static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca);
-static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca);
-
-static int xp_cmp(const X509_PURPOSE * const *a,
-               const X509_PURPOSE * const *b);
-static void xptable_free(X509_PURPOSE *p);
-
-static X509_PURPOSE xstandard[] = {
-       {X509_PURPOSE_SSL_CLIENT, X509_TRUST_SSL_CLIENT, 0, check_purpose_ssl_client, "SSL client", "sslclient", NULL},
-       {X509_PURPOSE_SSL_SERVER, X509_TRUST_SSL_SERVER, 0, check_purpose_ssl_server, "SSL server", "sslserver", NULL},
-       {X509_PURPOSE_NS_SSL_SERVER, X509_TRUST_SSL_SERVER, 0, check_purpose_ns_ssl_server, "Netscape SSL server", "nssslserver", NULL},
-       {X509_PURPOSE_SMIME_SIGN, X509_TRUST_EMAIL, 0, check_purpose_smime_sign, "S/MIME signing", "smimesign", NULL},
-       {X509_PURPOSE_SMIME_ENCRYPT, X509_TRUST_EMAIL, 0, check_purpose_smime_encrypt, "S/MIME encryption", "smimeencrypt", NULL},
-       {X509_PURPOSE_CRL_SIGN, X509_TRUST_COMPAT, 0, check_purpose_crl_sign, "CRL signing", "crlsign", NULL},
-       {X509_PURPOSE_ANY, X509_TRUST_DEFAULT, 0, no_check, "Any Purpose", "any", NULL},
-       {X509_PURPOSE_OCSP_HELPER, X509_TRUST_COMPAT, 0, ocsp_helper, "OCSP helper", "ocsphelper", NULL},
-};
-
-#define X509_PURPOSE_COUNT (sizeof(xstandard)/sizeof(X509_PURPOSE))
-
-IMPLEMENT_STACK_OF(X509_PURPOSE)
-
-static STACK_OF(X509_PURPOSE) *xptable = NULL;
-
-static int xp_cmp(const X509_PURPOSE * const *a,
-               const X509_PURPOSE * const *b)
-{
-       return (*a)->purpose - (*b)->purpose;
-}
-
-/* As much as I'd like to make X509_check_purpose use a "const" X509*
- * I really can't because it does recalculate hashes and do other non-const
- * things. */
-int X509_check_purpose(X509 *x, int id, int ca)
-{
-       int idx;
-       const X509_PURPOSE *pt;
-       if(!(x->ex_flags & EXFLAG_SET)) {
-               CRYPTO_w_lock(CRYPTO_LOCK_X509);
-               x509v3_cache_extensions(x);
-               CRYPTO_w_unlock(CRYPTO_LOCK_X509);
-       }
-       if(id == -1) return 1;
-       idx = X509_PURPOSE_get_by_id(id);
-       if(idx == -1) return -1;
-       pt = X509_PURPOSE_get0(idx);
-       return pt->check_purpose(pt, x, ca);
-}
-
-int X509_PURPOSE_set(int *p, int purpose)
-{
-       if(X509_PURPOSE_get_by_id(purpose) == -1) {
-               X509V3err(X509V3_F_X509_PURPOSE_SET, X509V3_R_INVALID_PURPOSE);
-               return 0;
-       }
-       *p = purpose;
-       return 1;
-}
-
-int X509_PURPOSE_get_count(void)
-{
-       if(!xptable) return X509_PURPOSE_COUNT;
-       return sk_X509_PURPOSE_num(xptable) + X509_PURPOSE_COUNT;
-}
-
-X509_PURPOSE * X509_PURPOSE_get0(int idx)
-{
-       if(idx < 0) return NULL;
-       if(idx < X509_PURPOSE_COUNT) return xstandard + idx;
-       return sk_X509_PURPOSE_value(xptable, idx - X509_PURPOSE_COUNT);
-}
-
-int X509_PURPOSE_get_by_sname(char *sname)
-{
-       int i;
-       X509_PURPOSE *xptmp;
-       for(i = 0; i < X509_PURPOSE_get_count(); i++) {
-               xptmp = X509_PURPOSE_get0(i);
-               if(!strcmp(xptmp->sname, sname)) return i;
-       }
-       return -1;
-}
-
-int X509_PURPOSE_get_by_id(int purpose)
-{
-       X509_PURPOSE tmp;
-       int idx;
-       if((purpose >= X509_PURPOSE_MIN) && (purpose <= X509_PURPOSE_MAX))
-               return purpose - X509_PURPOSE_MIN;
-       tmp.purpose = purpose;
-       if(!xptable) return -1;
-       idx = sk_X509_PURPOSE_find(xptable, &tmp);
-       if(idx == -1) return -1;
-       return idx + X509_PURPOSE_COUNT;
-}
-
-int X509_PURPOSE_add(int id, int trust, int flags,
-                       int (*ck)(const X509_PURPOSE *, const X509 *, int),
-                                       char *name, char *sname, void *arg)
-{
-       int idx;
-       X509_PURPOSE *ptmp;
-       /* This is set according to what we change: application can't set it */
-       flags &= ~X509_PURPOSE_DYNAMIC;
-       /* This will always be set for application modified trust entries */
-       flags |= X509_PURPOSE_DYNAMIC_NAME;
-       /* Get existing entry if any */
-       idx = X509_PURPOSE_get_by_id(id);
-       /* Need a new entry */
-       if(idx == -1) {
-               if(!(ptmp = OPENSSL_malloc(sizeof(X509_PURPOSE)))) {
-                       X509V3err(X509V3_F_X509_PURPOSE_ADD,ERR_R_MALLOC_FAILURE);
-                       return 0;
-               }
-               ptmp->flags = X509_PURPOSE_DYNAMIC;
-       } else ptmp = X509_PURPOSE_get0(idx);
-
-       /* OPENSSL_free existing name if dynamic */
-       if(ptmp->flags & X509_PURPOSE_DYNAMIC_NAME) {
-               OPENSSL_free(ptmp->name);
-               OPENSSL_free(ptmp->sname);
-       }
-       /* dup supplied name */
-       ptmp->name = BUF_strdup(name);
-       ptmp->sname = BUF_strdup(sname);
-       if(!ptmp->name || !ptmp->sname) {
-               X509V3err(X509V3_F_X509_PURPOSE_ADD,ERR_R_MALLOC_FAILURE);
-               return 0;
-       }
-       /* Keep the dynamic flag of existing entry */
-       ptmp->flags &= X509_PURPOSE_DYNAMIC;
-       /* Set all other flags */
-       ptmp->flags |= flags;
-
-       ptmp->purpose = id;
-       ptmp->trust = trust;
-       ptmp->check_purpose = ck;
-       ptmp->usr_data = arg;
-
-       /* If its a new entry manage the dynamic table */
-       if(idx == -1) {
-               if(!xptable && !(xptable = sk_X509_PURPOSE_new(xp_cmp))) {
-                       X509V3err(X509V3_F_X509_PURPOSE_ADD,ERR_R_MALLOC_FAILURE);
-                       return 0;
-               }
-               if (!sk_X509_PURPOSE_push(xptable, ptmp)) {
-                       X509V3err(X509V3_F_X509_PURPOSE_ADD,ERR_R_MALLOC_FAILURE);
-                       return 0;
-               }
-       }
-       return 1;
-}
-
-static void xptable_free(X509_PURPOSE *p)
-       {
-       if(!p) return;
-       if (p->flags & X509_PURPOSE_DYNAMIC) 
-               {
-               if (p->flags & X509_PURPOSE_DYNAMIC_NAME) {
-                       OPENSSL_free(p->name);
-                       OPENSSL_free(p->sname);
-               }
-               OPENSSL_free(p);
-               }
-       }
-
-void X509_PURPOSE_cleanup(void)
-{
-       int i;
-       sk_X509_PURPOSE_pop_free(xptable, xptable_free);
-       for(i = 0; i < X509_PURPOSE_COUNT; i++) xptable_free(xstandard + i);
-       xptable = NULL;
-}
-
-int X509_PURPOSE_get_id(X509_PURPOSE *xp)
-{
-       return xp->purpose;
-}
-
-char *X509_PURPOSE_get0_name(X509_PURPOSE *xp)
-{
-       return xp->name;
-}
-
-char *X509_PURPOSE_get0_sname(X509_PURPOSE *xp)
-{
-       return xp->sname;
-}
-
-int X509_PURPOSE_get_trust(X509_PURPOSE *xp)
-{
-       return xp->trust;
-}
-
-static int nid_cmp(int *a, int *b)
-       {
-       return *a - *b;
-       }
-
-int X509_supported_extension(X509_EXTENSION *ex)
-       {
-       /* This table is a list of the NIDs of supported extensions:
-        * that is those which are used by the verify process. If
-        * an extension is critical and doesn't appear in this list
-        * then the verify process will normally reject the certificate.
-        * The list must be kept in numerical order because it will be
-        * searched using bsearch.
-        */
-
-       static int supported_nids[] = {
-               NID_netscape_cert_type, /* 71 */
-               NID_key_usage,          /* 83 */
-               NID_subject_alt_name,   /* 85 */
-               NID_basic_constraints,  /* 87 */
-               NID_ext_key_usage       /* 126 */
-       };
-
-       int ex_nid;
-
-       ex_nid = OBJ_obj2nid(X509_EXTENSION_get_object(ex));
-
-       if (ex_nid == NID_undef) 
-               return 0;
-
-       if (OBJ_bsearch((char *)&ex_nid, (char *)supported_nids,
-               sizeof(supported_nids)/sizeof(int), sizeof(int),
-               (int (*)(const void *, const void *))nid_cmp))
-               return 1;
-       return 0;
-       }
-
-static void x509v3_cache_extensions(X509 *x)
-{
-       BASIC_CONSTRAINTS *bs;
-       ASN1_BIT_STRING *usage;
-       ASN1_BIT_STRING *ns;
-       EXTENDED_KEY_USAGE *extusage;
-       X509_EXTENSION *ex;
-       
-       int i;
-       if(x->ex_flags & EXFLAG_SET) return;
-#ifndef OPENSSL_NO_SHA
-       X509_digest(x, EVP_sha1(), x->sha1_hash, NULL);
-#endif
-       /* Does subject name match issuer ? */
-       if(!X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x)))
-                        x->ex_flags |= EXFLAG_SS;
-       /* V1 should mean no extensions ... */
-       if(!X509_get_version(x)) x->ex_flags |= EXFLAG_V1;
-       /* Handle basic constraints */
-       if((bs=X509_get_ext_d2i(x, NID_basic_constraints, NULL, NULL))) {
-               if(bs->ca) x->ex_flags |= EXFLAG_CA;
-               if(bs->pathlen) {
-                       if((bs->pathlen->type == V_ASN1_NEG_INTEGER)
-                                               || !bs->ca) {
-                               x->ex_flags |= EXFLAG_INVALID;
-                               x->ex_pathlen = 0;
-                       } else x->ex_pathlen = ASN1_INTEGER_get(bs->pathlen);
-               } else x->ex_pathlen = -1;
-               BASIC_CONSTRAINTS_free(bs);
-               x->ex_flags |= EXFLAG_BCONS;
-       }
-       /* Handle key usage */
-       if((usage=X509_get_ext_d2i(x, NID_key_usage, NULL, NULL))) {
-               if(usage->length > 0) {
-                       x->ex_kusage = usage->data[0];
-                       if(usage->length > 1) 
-                               x->ex_kusage |= usage->data[1] << 8;
-               } else x->ex_kusage = 0;
-               x->ex_flags |= EXFLAG_KUSAGE;
-               ASN1_BIT_STRING_free(usage);
-       }
-       x->ex_xkusage = 0;
-       if((extusage=X509_get_ext_d2i(x, NID_ext_key_usage, NULL, NULL))) {
-               x->ex_flags |= EXFLAG_XKUSAGE;
-               for(i = 0; i < sk_ASN1_OBJECT_num(extusage); i++) {
-                       switch(OBJ_obj2nid(sk_ASN1_OBJECT_value(extusage,i))) {
-                               case NID_server_auth:
-                               x->ex_xkusage |= XKU_SSL_SERVER;
-                               break;
-
-                               case NID_client_auth:
-                               x->ex_xkusage |= XKU_SSL_CLIENT;
-                               break;
-
-                               case NID_email_protect:
-                               x->ex_xkusage |= XKU_SMIME;
-                               break;
-
-                               case NID_code_sign:
-                               x->ex_xkusage |= XKU_CODE_SIGN;
-                               break;
-
-                               case NID_ms_sgc:
-                               case NID_ns_sgc:
-                               x->ex_xkusage |= XKU_SGC;
-                               break;
-
-                               case NID_OCSP_sign:
-                               x->ex_xkusage |= XKU_OCSP_SIGN;
-                               break;
-
-                               case NID_time_stamp:
-                               x->ex_xkusage |= XKU_TIMESTAMP;
-                               break;
-
-                               case NID_dvcs:
-                               x->ex_xkusage |= XKU_DVCS;
-                               break;
-                       }
-               }
-               sk_ASN1_OBJECT_pop_free(extusage, ASN1_OBJECT_free);
-       }
-
-       if((ns=X509_get_ext_d2i(x, NID_netscape_cert_type, NULL, NULL))) {
-               if(ns->length > 0) x->ex_nscert = ns->data[0];
-               else x->ex_nscert = 0;
-               x->ex_flags |= EXFLAG_NSCERT;
-               ASN1_BIT_STRING_free(ns);
-       }
-       x->skid =X509_get_ext_d2i(x, NID_subject_key_identifier, NULL, NULL);
-       x->akid =X509_get_ext_d2i(x, NID_authority_key_identifier, NULL, NULL);
-       for (i = 0; i < X509_get_ext_count(x); i++)
-               {
-               ex = X509_get_ext(x, i);
-               if (!X509_EXTENSION_get_critical(ex))
-                       continue;
-               if (!X509_supported_extension(ex))
-                       {
-                       x->ex_flags |= EXFLAG_CRITICAL;
-                       break;
-                       }
-               }
-       x->ex_flags |= EXFLAG_SET;
-}
-
-/* CA checks common to all purposes
- * return codes:
- * 0 not a CA
- * 1 is a CA
- * 2 basicConstraints absent so "maybe" a CA
- * 3 basicConstraints absent but self signed V1.
- * 4 basicConstraints absent but keyUsage present and keyCertSign asserted.
- */
-
-#define V1_ROOT (EXFLAG_V1|EXFLAG_SS)
-#define ku_reject(x, usage) \
-       (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
-#define xku_reject(x, usage) \
-       (((x)->ex_flags & EXFLAG_XKUSAGE) && !((x)->ex_xkusage & (usage)))
-#define ns_reject(x, usage) \
-       (((x)->ex_flags & EXFLAG_NSCERT) && !((x)->ex_nscert & (usage)))
-
-static int check_ca(const X509 *x)
-{
-       /* keyUsage if present should allow cert signing */
-       if(ku_reject(x, KU_KEY_CERT_SIGN)) return 0;
-       if(x->ex_flags & EXFLAG_BCONS) {
-               if(x->ex_flags & EXFLAG_CA) return 1;
-               /* If basicConstraints says not a CA then say so */
-               else return 0;
-       } else {
-               /* we support V1 roots for...  uh, I don't really know why. */
-               if((x->ex_flags & V1_ROOT) == V1_ROOT) return 3;
-               /* If key usage present it must have certSign so tolerate it */
-               else if (x->ex_flags & EXFLAG_KUSAGE) return 4;
-               /* Older certificates could have Netscape-specific CA types */
-               else if (x->ex_flags & EXFLAG_NSCERT
-                        && x->ex_nscert & NS_ANY_CA) return 5;
-               /* can this still be regarded a CA certificate?  I doubt it */
-               return 0;
-       }
-}
-
-int X509_check_ca(X509 *x)
-{
-       if(!(x->ex_flags & EXFLAG_SET)) {
-               CRYPTO_w_lock(CRYPTO_LOCK_X509);
-               x509v3_cache_extensions(x);
-               CRYPTO_w_unlock(CRYPTO_LOCK_X509);
-       }
-
-       return check_ca(x);
-}
-
-/* Check SSL CA: common checks for SSL client and server */
-static int check_ssl_ca(const X509 *x)
-{
-       int ca_ret;
-       ca_ret = check_ca(x);
-       if(!ca_ret) return 0;
-       /* check nsCertType if present */
-       if(ca_ret != 5 || x->ex_nscert & NS_SSL_CA) return ca_ret;
-       else return 0;
-}
-
-
-static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       if(xku_reject(x,XKU_SSL_CLIENT)) return 0;
-       if(ca) return check_ssl_ca(x);
-       /* We need to do digital signatures with it */
-       if(ku_reject(x,KU_DIGITAL_SIGNATURE)) return 0;
-       /* nsCertType if present should allow SSL client use */ 
-       if(ns_reject(x, NS_SSL_CLIENT)) return 0;
-       return 1;
-}
-
-static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       if(xku_reject(x,XKU_SSL_SERVER|XKU_SGC)) return 0;
-       if(ca) return check_ssl_ca(x);
-
-       if(ns_reject(x, NS_SSL_SERVER)) return 0;
-       /* Now as for keyUsage: we'll at least need to sign OR encipher */
-       if(ku_reject(x, KU_DIGITAL_SIGNATURE|KU_KEY_ENCIPHERMENT)) return 0;
-       
-       return 1;
-
-}
-
-static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       int ret;
-       ret = check_purpose_ssl_server(xp, x, ca);
-       if(!ret || ca) return ret;
-       /* We need to encipher or Netscape complains */
-       if(ku_reject(x, KU_KEY_ENCIPHERMENT)) return 0;
-       return ret;
-}
-
-/* common S/MIME checks */
-static int purpose_smime(const X509 *x, int ca)
-{
-       if(xku_reject(x,XKU_SMIME)) return 0;
-       if(ca) {
-               int ca_ret;
-               ca_ret = check_ca(x);
-               if(!ca_ret) return 0;
-               /* check nsCertType if present */
-               if(ca_ret != 5 || x->ex_nscert & NS_SMIME_CA) return ca_ret;
-               else return 0;
-       }
-       if(x->ex_flags & EXFLAG_NSCERT) {
-               if(x->ex_nscert & NS_SMIME) return 1;
-               /* Workaround for some buggy certificates */
-               if(x->ex_nscert & NS_SSL_CLIENT) return 2;
-               return 0;
-       }
-       return 1;
-}
-
-static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       int ret;
-       ret = purpose_smime(x, ca);
-       if(!ret || ca) return ret;
-       if(ku_reject(x, KU_DIGITAL_SIGNATURE|KU_NON_REPUDIATION)) return 0;
-       return ret;
-}
-
-static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       int ret;
-       ret = purpose_smime(x, ca);
-       if(!ret || ca) return ret;
-       if(ku_reject(x, KU_KEY_ENCIPHERMENT)) return 0;
-       return ret;
-}
-
-static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       if(ca) {
-               int ca_ret;
-               if((ca_ret = check_ca(x)) != 2) return ca_ret;
-               else return 0;
-       }
-       if(ku_reject(x, KU_CRL_SIGN)) return 0;
-       return 1;
-}
-
-/* OCSP helper: this is *not* a full OCSP check. It just checks that
- * each CA is valid. Additional checks must be made on the chain.
- */
-
-static int ocsp_helper(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       /* Must be a valid CA.  Should we really support the "I don't know"
-          value (2)? */
-       if(ca) return check_ca(x);
-       /* leaf certificate is checked in OCSP_verify() */
-       return 1;
-}
-
-static int no_check(const X509_PURPOSE *xp, const X509 *x, int ca)
-{
-       return 1;
-}
-
-/* Various checks to see if one certificate issued the second.
- * This can be used to prune a set of possible issuer certificates
- * which have been looked up using some simple method such as by
- * subject name.
- * These are:
- * 1. Check issuer_name(subject) == subject_name(issuer)
- * 2. If akid(subject) exists check it matches issuer
- * 3. If key_usage(issuer) exists check it supports certificate signing
- * returns 0 for OK, positive for reason for mismatch, reasons match
- * codes for X509_verify_cert()
- */
-
-int X509_check_issued(X509 *issuer, X509 *subject)
-{
-       if(X509_NAME_cmp(X509_get_subject_name(issuer),
-                       X509_get_issuer_name(subject)))
-                               return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
-       x509v3_cache_extensions(issuer);
-       x509v3_cache_extensions(subject);
-       if(subject->akid) {
-               /* Check key ids (if present) */
-               if(subject->akid->keyid && issuer->skid &&
-                ASN1_OCTET_STRING_cmp(subject->akid->keyid, issuer->skid) )
-                               return X509_V_ERR_AKID_SKID_MISMATCH;
-               /* Check serial number */
-               if(subject->akid->serial &&
-                       ASN1_INTEGER_cmp(X509_get_serialNumber(issuer),
-                                               subject->akid->serial))
-                               return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
-               /* Check issuer name */
-               if(subject->akid->issuer) {
-                       /* Ugh, for some peculiar reason AKID includes
-                        * SEQUENCE OF GeneralName. So look for a DirName.
-                        * There may be more than one but we only take any
-                        * notice of the first.
-                        */
-                       GENERAL_NAMES *gens;
-                       GENERAL_NAME *gen;
-                       X509_NAME *nm = NULL;
-                       int i;
-                       gens = subject->akid->issuer;
-                       for(i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
-                               gen = sk_GENERAL_NAME_value(gens, i);
-                               if(gen->type == GEN_DIRNAME) {
-                                       nm = gen->d.dirn;
-                                       break;
-                               }
-                       }
-                       if(nm && X509_NAME_cmp(nm, X509_get_issuer_name(issuer)))
-                               return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
-               }
-       }
-       if(ku_reject(issuer, KU_KEY_CERT_SIGN)) return X509_V_ERR_KEYUSAGE_NO_CERTSIGN;
-       return X509_V_OK;
-}
-