blob: 71cf71dccb19aea9f9b7383695ac426374a6a2ae [file] [log] [blame]
/*
* Written by Dr Stephen N Henson (steve@openssl.org) 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 <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/obj.h>
#include <openssl/x509v3.h>
#include "../x509v3/internal.h"
#include "internal.h"
static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b);
static void trtable_free(X509_TRUST *p);
static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags);
static int trust_1oid(X509_TRUST *trust, X509 *x, int flags);
static int trust_compat(X509_TRUST *trust, X509 *x, int flags);
static int obj_trust(int id, X509 *x, int flags);
// WARNING: the following table should be kept in order of trust and without
// any gaps so we can just subtract the minimum trust value to get an index
// into the table
static X509_TRUST trstandard[] = {
{X509_TRUST_COMPAT, 0, trust_compat, (char *)"compatible", 0, NULL},
{X509_TRUST_SSL_CLIENT, 0, trust_1oidany, (char *)"SSL Client",
NID_client_auth, NULL},
{X509_TRUST_SSL_SERVER, 0, trust_1oidany, (char *)"SSL Server",
NID_server_auth, NULL},
{X509_TRUST_EMAIL, 0, trust_1oidany, (char *)"S/MIME email",
NID_email_protect, NULL},
{X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, (char *)"Object Signer",
NID_code_sign, NULL},
{X509_TRUST_OCSP_SIGN, 0, trust_1oid, (char *)"OCSP responder",
NID_OCSP_sign, NULL},
{X509_TRUST_OCSP_REQUEST, 0, trust_1oid, (char *)"OCSP request",
NID_ad_OCSP, NULL},
{X509_TRUST_TSA, 0, trust_1oidany, (char *)"TSA server", NID_time_stamp,
NULL}};
#define X509_TRUST_COUNT (sizeof(trstandard) / sizeof(X509_TRUST))
static STACK_OF(X509_TRUST) *trtable = NULL;
static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b) {
return (*a)->trust - (*b)->trust;
}
int X509_check_trust(X509 *x, int id, int flags) {
X509_TRUST *pt;
int idx;
if (id == -1) {
return 1;
}
// We get this as a default value
if (id == 0) {
int rv;
rv = obj_trust(NID_anyExtendedKeyUsage, x, 0);
if (rv != X509_TRUST_UNTRUSTED) {
return rv;
}
return trust_compat(NULL, x, 0);
}
idx = X509_TRUST_get_by_id(id);
if (idx == -1) {
return obj_trust(id, x, flags);
}
pt = X509_TRUST_get0(idx);
return pt->check_trust(pt, x, flags);
}
int X509_TRUST_get_count(void) {
if (!trtable) {
return X509_TRUST_COUNT;
}
return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
}
X509_TRUST *X509_TRUST_get0(int idx) {
if (idx < 0) {
return NULL;
}
if (idx < (int)X509_TRUST_COUNT) {
return trstandard + idx;
}
return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
}
int X509_TRUST_get_by_id(int id) {
X509_TRUST tmp;
size_t idx;
if ((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX)) {
return id - X509_TRUST_MIN;
}
tmp.trust = id;
if (!trtable) {
return -1;
}
if (!sk_X509_TRUST_find(trtable, &idx, &tmp)) {
return -1;
}
return idx + X509_TRUST_COUNT;
}
int X509_TRUST_set(int *t, int trust) {
if (X509_TRUST_get_by_id(trust) == -1) {
OPENSSL_PUT_ERROR(X509, X509_R_INVALID_TRUST);
return 0;
}
*t = trust;
return 1;
}
int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int),
const char *name, int arg1, void *arg2) {
int idx;
X509_TRUST *trtmp;
char *name_dup;
// This is set according to what we change: application can't set it
flags &= ~X509_TRUST_DYNAMIC;
// This will always be set for application modified trust entries
flags |= X509_TRUST_DYNAMIC_NAME;
// Get existing entry if any
idx = X509_TRUST_get_by_id(id);
// Need a new entry
if (idx == -1) {
if (!(trtmp = OPENSSL_malloc(sizeof(X509_TRUST)))) {
return 0;
}
trtmp->flags = X509_TRUST_DYNAMIC;
} else {
trtmp = X509_TRUST_get0(idx);
}
// Duplicate the supplied name.
name_dup = OPENSSL_strdup(name);
if (name_dup == NULL) {
if (idx == -1) {
OPENSSL_free(trtmp);
}
return 0;
}
// OPENSSL_free existing name if dynamic
if (trtmp->flags & X509_TRUST_DYNAMIC_NAME) {
OPENSSL_free(trtmp->name);
}
trtmp->name = name_dup;
// Keep the dynamic flag of existing entry
trtmp->flags &= X509_TRUST_DYNAMIC;
// Set all other flags
trtmp->flags |= flags;
trtmp->trust = id;
trtmp->check_trust = ck;
trtmp->arg1 = arg1;
trtmp->arg2 = arg2;
// If its a new entry manage the dynamic table
if (idx == -1) {
// TODO(davidben): This should be locked. Alternatively, remove the dynamic
// registration mechanism entirely. The trouble is there no way to pass in
// the various parameters into an |X509_VERIFY_PARAM| directly. You can only
// register it in the global table and get an ID.
if (!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) {
trtable_free(trtmp);
return 0;
}
if (!sk_X509_TRUST_push(trtable, trtmp)) {
trtable_free(trtmp);
return 0;
}
sk_X509_TRUST_sort(trtable);
}
return 1;
}
static void trtable_free(X509_TRUST *p) {
if (!p) {
return;
}
if (p->flags & X509_TRUST_DYNAMIC) {
if (p->flags & X509_TRUST_DYNAMIC_NAME) {
OPENSSL_free(p->name);
}
OPENSSL_free(p);
}
}
void X509_TRUST_cleanup(void) {
unsigned int i;
for (i = 0; i < X509_TRUST_COUNT; i++) {
trtable_free(trstandard + i);
}
sk_X509_TRUST_pop_free(trtable, trtable_free);
trtable = NULL;
}
int X509_TRUST_get_flags(const X509_TRUST *xp) { return xp->flags; }
char *X509_TRUST_get0_name(const X509_TRUST *xp) { return xp->name; }
int X509_TRUST_get_trust(const X509_TRUST *xp) { return xp->trust; }
static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags) {
if (x->aux && (x->aux->trust || x->aux->reject)) {
return obj_trust(trust->arg1, x, flags);
}
// we don't have any trust settings: for compatibility we return trusted
// if it is self signed
return trust_compat(trust, x, flags);
}
static int trust_1oid(X509_TRUST *trust, X509 *x, int flags) {
if (x->aux) {
return obj_trust(trust->arg1, x, flags);
}
return X509_TRUST_UNTRUSTED;
}
static int trust_compat(X509_TRUST *trust, X509 *x, int flags) {
if (!x509v3_cache_extensions(x)) {
return X509_TRUST_UNTRUSTED;
}
if (x->ex_flags & EXFLAG_SS) {
return X509_TRUST_TRUSTED;
} else {
return X509_TRUST_UNTRUSTED;
}
}
static int obj_trust(int id, X509 *x, int flags) {
ASN1_OBJECT *obj;
size_t i;
X509_CERT_AUX *ax;
ax = x->aux;
if (!ax) {
return X509_TRUST_UNTRUSTED;
}
if (ax->reject) {
for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
obj = sk_ASN1_OBJECT_value(ax->reject, i);
if (OBJ_obj2nid(obj) == id) {
return X509_TRUST_REJECTED;
}
}
}
if (ax->trust) {
for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
obj = sk_ASN1_OBJECT_value(ax->trust, i);
if (OBJ_obj2nid(obj) == id) {
return X509_TRUST_TRUSTED;
}
}
}
return X509_TRUST_UNTRUSTED;
}