GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/x509/x509_trs.c Lines: 30 114 26.3 %
Date: 2017-11-13 Branches: 12 74 16.2 %

Line Branch Exec Source
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/* $OpenBSD: x509_trs.c,v 1.22 2017/01/29 17:49:23 beck Exp $ */
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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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59
#include <stdio.h>
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#include <string.h>
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62
#include <openssl/err.h>
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#include <openssl/x509v3.h>
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65
static int tr_cmp(const X509_TRUST * const *a, const X509_TRUST * const *b);
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static void trtable_free(X509_TRUST *p);
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68
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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72
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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75
/* 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
78
 */
79
80
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}
89
};
90
91
#define X509_TRUST_COUNT	(sizeof(trstandard)/sizeof(X509_TRUST))
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93
static STACK_OF(X509_TRUST) *trtable = NULL;
94
95
static int
96
tr_cmp(const X509_TRUST * const *a, const X509_TRUST * const *b)
97
{
98
	return (*a)->trust - (*b)->trust;
99
}
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101
int
102
(*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int)
103
{
104
	int (*oldtrust)(int , X509 *, int);
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106
	oldtrust = default_trust;
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	default_trust = trust;
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	return oldtrust;
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}
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111
int
112
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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117
2582
	if (id == -1)
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		return 1;
119
	/*
120
	 * XXX beck/jsing This enables self signed certs to be trusted for
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	 * an unspecified id/trust flag value (this is NOT the
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	 * X509_TRUST_DEFAULT), which was the longstanding
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	 * openssl behaviour. boringssl does not have this behaviour.
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	 *
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	 * This should be revisited, but changing the default "not default"
126
	 * may break things.
127
	 */
128
1291
	if (id == 0) {
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		int rv;
130
106
		rv = obj_trust(NID_anyExtendedKeyUsage, x, 0);
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106
		if (rv != X509_TRUST_UNTRUSTED)
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			return rv;
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		return trust_compat(NULL, x, 0);
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	}
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1185
	idx = X509_TRUST_get_by_id(id);
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1185
	if (idx == -1)
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		return default_trust(id, x, flags);
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1185
	pt = X509_TRUST_get0(idx);
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1185
	return pt->check_trust(pt, x, flags);
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1291
}
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142
int
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X509_TRUST_get_count(void)
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{
145
	if (!trtable)
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		return X509_TRUST_COUNT;
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	return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
148
}
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150
X509_TRUST *
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X509_TRUST_get0(int idx)
152
{
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2370
	if (idx < 0)
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		return NULL;
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1185
	if (idx < (int)X509_TRUST_COUNT)
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1185
		return trstandard + idx;
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	return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
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1185
}
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160
int
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X509_TRUST_get_by_id(int id)
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{
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2382
	X509_TRUST tmp;
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	int idx;
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166
1191
	if ((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
167
1191
		return id - X509_TRUST_MIN;
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	tmp.trust = id;
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	if (!trtable)
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		return -1;
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	idx = sk_X509_TRUST_find(trtable, &tmp);
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	if (idx == -1)
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		return -1;
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	return idx + X509_TRUST_COUNT;
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1191
}
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177
int
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X509_TRUST_set(int *t, int trust)
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{
180
	if (X509_TRUST_get_by_id(trust) == -1) {
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		X509error(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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188
int
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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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	char *name_dup;
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196
	/* 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 = malloc(sizeof(X509_TRUST)))) {
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			X509error(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 {
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		trtmp = X509_TRUST_get0(idx);
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		if (trtmp == NULL) {
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			X509error(X509_R_INVALID_TRUST);
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			return 0;
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		}
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	}
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217
	if ((name_dup = strdup(name)) == NULL)
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		goto err;
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220
	/* free existing name if dynamic */
221
	if (trtmp->flags & X509_TRUST_DYNAMIC_NAME)
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		free(trtmp->name);
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	/* dup supplied name */
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	trtmp->name = name_dup;
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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 it's a new entry, manage the dynamic table */
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	if (idx == -1) {
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		if (trtable == NULL &&
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		    (trtable = sk_X509_TRUST_new(tr_cmp)) == NULL)
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			goto err;
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		if (sk_X509_TRUST_push(trtable, trtmp) == 0)
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			goto err;
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	}
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	return 1;
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245
err:
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	free(name_dup);
247
	if (idx == -1)
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		free(trtmp);
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	X509error(ERR_R_MALLOC_FAILURE);
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	return 0;
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}
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253
static void
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trtable_free(X509_TRUST *p)
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{
256
	if (!p)
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		return;
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	if (p->flags & X509_TRUST_DYNAMIC) {
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		if (p->flags & X509_TRUST_DYNAMIC_NAME)
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			free(p->name);
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		free(p);
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	}
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}
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265
void
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X509_TRUST_cleanup(void)
267
{
268
	unsigned int i;
269
270
	for (i = 0; i < X509_TRUST_COUNT; i++)
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		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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276
int
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X509_TRUST_get_flags(X509_TRUST *xp)
278
{
279
	return xp->flags;
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}
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282
char *
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X509_TRUST_get0_name(X509_TRUST *xp)
284
{
285
	return xp->name;
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}
287
288
int
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X509_TRUST_get_trust(X509_TRUST *xp)
290
{
291
	return xp->trust;
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}
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294
static int
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trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
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{
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2362
	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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	 */
302
1181
	return trust_compat(trust, x, flags);
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1181
}
304
305
static int
306
trust_1oid(X509_TRUST *trust, X509 *x, int flags)
307
{
308
	if (x->aux)
309
		return obj_trust(trust->arg1, x, flags);
310
	return X509_TRUST_UNTRUSTED;
311
}
312
313
static int
314
trust_compat(X509_TRUST *trust, X509 *x, int flags)
315
{
316
2582
	X509_check_purpose(x, -1, 0);
317
1291
	if (x->ex_flags & EXFLAG_SS)
318
1228
		return X509_TRUST_TRUSTED;
319
	else
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63
		return X509_TRUST_UNTRUSTED;
321
1291
}
322
323
static int
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obj_trust(int id, X509 *x, int flags)
325
{
326
	ASN1_OBJECT *obj;
327
	int i;
328
	X509_CERT_AUX *ax;
329
330
212
	ax = x->aux;
331
106
	if (!ax)
332
106
		return X509_TRUST_UNTRUSTED;
333
	if (ax->reject) {
334
		for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
335
			obj = sk_ASN1_OBJECT_value(ax->reject, i);
336
			if (OBJ_obj2nid(obj) == id)
337
				return X509_TRUST_REJECTED;
338
		}
339
	}
340
	if (ax->trust) {
341
		for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
342
			obj = sk_ASN1_OBJECT_value(ax->trust, i);
343
			if (OBJ_obj2nid(obj) == id)
344
				return X509_TRUST_TRUSTED;
345
		}
346
	}
347
	return X509_TRUST_UNTRUSTED;
348
106
}