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/* v3_purp.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 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>
static void x509v3_cache_extensions(X509 *x);
static int ca_check(const 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 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},
};
#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_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
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