289 lines
8.6 KiB
C
289 lines
8.6 KiB
C
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/* x509_trs.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project 1999.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/x509v3.h>
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static int tr_cmp(const X509_TRUST * const *a,
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const X509_TRUST * const *b);
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static void trtable_free(X509_TRUST *p);
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static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags);
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static int trust_1oid(X509_TRUST *trust, X509 *x, int flags);
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static int trust_compat(X509_TRUST *trust, X509 *x, int flags);
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static int obj_trust(int id, X509 *x, int flags);
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static int (*default_trust)(int id, X509 *x, int flags) = obj_trust;
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/* WARNING: the following table should be kept in order of trust
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* and without any gaps so we can just subtract the minimum trust
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* value to get an index into the table
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*/
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static X509_TRUST trstandard[] = {
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{X509_TRUST_COMPAT, 0, trust_compat, "compatible", 0, NULL},
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{X509_TRUST_SSL_CLIENT, 0, trust_1oidany, "SSL Client", NID_client_auth, NULL},
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{X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Server", NID_server_auth, NULL},
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{X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect, NULL},
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{X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, "Object Signer", NID_code_sign, NULL},
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{X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign, NULL},
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{X509_TRUST_OCSP_REQUEST, 0, trust_1oid, "OCSP request", NID_ad_OCSP, NULL},
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{X509_TRUST_TSA, 0, trust_1oidany, "TSA server", NID_time_stamp, NULL}
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};
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#define X509_TRUST_COUNT (sizeof(trstandard)/sizeof(X509_TRUST))
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IMPLEMENT_STACK_OF(X509_TRUST)
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static STACK_OF(X509_TRUST) *trtable = NULL;
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static int tr_cmp(const X509_TRUST * const *a,
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const X509_TRUST * const *b)
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{
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return (*a)->trust - (*b)->trust;
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}
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int (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int)
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{
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int (*oldtrust)(int , X509 *, int);
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oldtrust = default_trust;
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default_trust = trust;
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return oldtrust;
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}
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int X509_check_trust(X509 *x, int id, int flags)
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{
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X509_TRUST *pt;
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int idx;
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if(id == -1) return 1;
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idx = X509_TRUST_get_by_id(id);
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if(idx == -1) return default_trust(id, x, flags);
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pt = X509_TRUST_get0(idx);
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return pt->check_trust(pt, x, flags);
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}
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int X509_TRUST_get_count(void)
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{
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if(!trtable) return X509_TRUST_COUNT;
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return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
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}
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X509_TRUST * X509_TRUST_get0(int idx)
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{
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if(idx < 0) return NULL;
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if(idx < (int)X509_TRUST_COUNT) return trstandard + idx;
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return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
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}
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int X509_TRUST_get_by_id(int id)
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{
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X509_TRUST tmp;
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int idx;
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if((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
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return id - X509_TRUST_MIN;
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tmp.trust = id;
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if(!trtable) return -1;
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idx = sk_X509_TRUST_find(trtable, &tmp);
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if(idx == -1) return -1;
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return idx + X509_TRUST_COUNT;
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}
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int X509_TRUST_set(int *t, int trust)
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{
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if(X509_TRUST_get_by_id(trust) == -1) {
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X509err(X509_F_X509_TRUST_SET, X509_R_INVALID_TRUST);
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return 0;
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}
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*t = trust;
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return 1;
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}
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int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int),
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char *name, int arg1, void *arg2)
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{
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int idx;
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X509_TRUST *trtmp;
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/* This is set according to what we change: application can't set it */
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flags &= ~X509_TRUST_DYNAMIC;
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/* This will always be set for application modified trust entries */
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flags |= X509_TRUST_DYNAMIC_NAME;
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/* Get existing entry if any */
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idx = X509_TRUST_get_by_id(id);
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/* Need a new entry */
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if(idx == -1) {
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if(!(trtmp = OPENSSL_malloc(sizeof(X509_TRUST)))) {
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X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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trtmp->flags = X509_TRUST_DYNAMIC;
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} else trtmp = X509_TRUST_get0(idx);
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/* OPENSSL_free existing name if dynamic */
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if(trtmp->flags & X509_TRUST_DYNAMIC_NAME) OPENSSL_free(trtmp->name);
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/* dup supplied name */
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if(!(trtmp->name = BUF_strdup(name))) {
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X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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/* Keep the dynamic flag of existing entry */
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trtmp->flags &= X509_TRUST_DYNAMIC;
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/* Set all other flags */
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trtmp->flags |= flags;
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trtmp->trust = id;
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trtmp->check_trust = ck;
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trtmp->arg1 = arg1;
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trtmp->arg2 = arg2;
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/* If its a new entry manage the dynamic table */
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if(idx == -1) {
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if(!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) {
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X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!sk_X509_TRUST_push(trtable, trtmp)) {
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X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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return 1;
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}
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static void trtable_free(X509_TRUST *p)
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{
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if(!p) return;
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if (p->flags & X509_TRUST_DYNAMIC)
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{
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if (p->flags & X509_TRUST_DYNAMIC_NAME)
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OPENSSL_free(p->name);
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OPENSSL_free(p);
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}
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}
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void X509_TRUST_cleanup(void)
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{
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unsigned int i;
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for(i = 0; i < X509_TRUST_COUNT; i++) trtable_free(trstandard + i);
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sk_X509_TRUST_pop_free(trtable, trtable_free);
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trtable = NULL;
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}
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int X509_TRUST_get_flags(X509_TRUST *xp)
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{
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return xp->flags;
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}
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char *X509_TRUST_get0_name(X509_TRUST *xp)
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{
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return xp->name;
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}
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int X509_TRUST_get_trust(X509_TRUST *xp)
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{
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return xp->trust;
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}
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static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
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{
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if(x->aux && (x->aux->trust || x->aux->reject))
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return obj_trust(trust->arg1, x, flags);
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/* we don't have any trust settings: for compatibility
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* we return trusted if it is self signed
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*/
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return trust_compat(trust, x, flags);
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}
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static int trust_1oid(X509_TRUST *trust, X509 *x, int flags)
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{
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if(x->aux) return obj_trust(trust->arg1, x, flags);
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return X509_TRUST_UNTRUSTED;
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}
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static int trust_compat(X509_TRUST *trust, X509 *x, int flags)
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{
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X509_check_purpose(x, -1, 0);
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if(x->ex_flags & EXFLAG_SS) return X509_TRUST_TRUSTED;
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else return X509_TRUST_UNTRUSTED;
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}
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static int obj_trust(int id, X509 *x, int flags)
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{
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ASN1_OBJECT *obj;
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int i;
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X509_CERT_AUX *ax;
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ax = x->aux;
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if(!ax) return X509_TRUST_UNTRUSTED;
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if(ax->reject) {
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for(i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
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obj = sk_ASN1_OBJECT_value(ax->reject, i);
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if(OBJ_obj2nid(obj) == id) return X509_TRUST_REJECTED;
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}
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}
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if(ax->trust) {
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for(i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
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obj = sk_ASN1_OBJECT_value(ax->trust, i);
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if(OBJ_obj2nid(obj) == id) return X509_TRUST_TRUSTED;
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}
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}
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return X509_TRUST_UNTRUSTED;
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}
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