Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/x509/x509_vpm.c	Lines:	73	236	30.9 %
Date:	2017-11-07	Branches:	45	194	23.2 %


/* $OpenBSD: x509_vpm.c,v 1.15 2016/12/21 15:15:45 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2004.
 */
/* ====================================================================
 * Copyright (c) 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 <string.h>

#include <openssl/buffer.h>
#include <openssl/crypto.h>
#include <openssl/lhash.h>
#include <openssl/stack.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

#include "vpm_int.h"

/* X509_VERIFY_PARAM functions */

int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param, const char *email,
    size_t emaillen);
int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param, const unsigned char *ip,
    size_t iplen);

#define SET_HOST 0
#define ADD_HOST 1

static void
str_free(char *s)
{
    free(s);
}

#define string_stack_free(sk) sk_OPENSSL_STRING_pop_free(sk, str_free)


/*
 * Post 1.0.1 sk function "deep_copy".  For the moment we simply make
 * these take void * and use them directly without a glorious blob of
 * obfuscating macros of dubious value in front of them. All this in
 * preparation for a rototilling of safestack.h (likely inspired by
 * this).
 */
static void *
sk_deep_copy(void *sk_void, void *copy_func_void, void *free_func_void)
{
	_STACK *sk = sk_void;
	void *(*copy_func)(void *) = copy_func_void;
	void (*free_func)(void *) = free_func_void;
	_STACK *ret = sk_dup(sk);

	if (ret == NULL)
		return NULL;

	size_t i;
	for (i = 0; i < ret->num; i++) {
		if (ret->data[i] == NULL)
			continue;
		ret->data[i] = copy_func(ret->data[i]);
		if (ret->data[i] == NULL) {
			size_t j;
			for (j = 0; j < i; j++) {
				if (ret->data[j] != NULL)
					free_func(ret->data[j]);
			}
			sk_free(ret);
			return NULL;
		}
	}

	return ret;
}

static int
int_x509_param_set_hosts(X509_VERIFY_PARAM_ID *id, int mode,
    const char *name, size_t namelen)
{
	char *copy;

	/*
	 * Refuse names with embedded NUL bytes.
	 * XXX: Do we need to push an error onto the error stack?
	 */
	if (name && memchr(name, '\0', namelen))
		return 0;

	if (mode == SET_HOST && id->hosts) {
		string_stack_free(id->hosts);
		id->hosts = NULL;
	}
	if (name == NULL || namelen == 0)
		return 1;
	copy = strndup(name, namelen);
	if (copy == NULL)
		return 0;

	if (id->hosts == NULL &&
	    (id->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
		free(copy);
		return 0;
	}

	if (!sk_OPENSSL_STRING_push(id->hosts, copy)) {
		free(copy);
		if (sk_OPENSSL_STRING_num(id->hosts) == 0) {
			sk_OPENSSL_STRING_free(id->hosts);
			id->hosts = NULL;
		}
		return 0;
	}

	return 1;
}

static void
x509_verify_param_zero(X509_VERIFY_PARAM *param)
{
	X509_VERIFY_PARAM_ID *paramid;
	if (!param)
		return;
	param->name = NULL;
	param->purpose = 0;
	param->trust = 0;
	/*param->inh_flags = X509_VP_FLAG_DEFAULT;*/
	param->inh_flags = 0;
	param->flags = 0;
	param->depth = -1;
	if (param->policies) {
		sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
		param->policies = NULL;
	}
	paramid = param->id;
	if (paramid->hosts) {
		string_stack_free(paramid->hosts);
		paramid->hosts = NULL;
	}
	free(paramid->peername);
	paramid->peername = NULL;
	free(paramid->email);
	paramid->email = NULL;
	paramid->emaillen = 0;
	free(paramid->ip);
	paramid->ip = NULL;
	paramid->iplen = 0;
}

X509_VERIFY_PARAM *
X509_VERIFY_PARAM_new(void)
{
	X509_VERIFY_PARAM *param;
	X509_VERIFY_PARAM_ID *paramid;
	param = calloc(1, sizeof(X509_VERIFY_PARAM));
	if (param == NULL)
		return NULL;
	paramid = calloc (1, sizeof(X509_VERIFY_PARAM_ID));
	if (paramid == NULL) {
		free(param);
		return NULL;
	}
	param->id = paramid;
	x509_verify_param_zero(param);
	return param;
}

void
X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
{
	if (param == NULL)
		return;
	x509_verify_param_zero(param);
	free(param->id);
	free(param);
}

/* This function determines how parameters are "inherited" from one structure
 * to another. There are several different ways this can happen.
 *
 * 1. If a child structure needs to have its values initialized from a parent
 *    they are simply copied across. For example SSL_CTX copied to SSL.
 * 2. If the structure should take on values only if they are currently unset.
 *    For example the values in an SSL structure will take appropriate value
 *    for SSL servers or clients but only if the application has not set new
 *    ones.
 *
 * The "inh_flags" field determines how this function behaves.
 *
 * Normally any values which are set in the default are not copied from the
 * destination and verify flags are ORed together.
 *
 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
 * to the destination. Effectively the values in "to" become default values
 * which will be used only if nothing new is set in "from".
 *
 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
 * they are set or not. Flags is still Ored though.
 *
 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
 * of ORed.
 *
 * If X509_VP_FLAG_LOCKED is set then no values are copied.
 *
 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
 * after the next call.
 */

/* Macro to test if a field should be copied from src to dest */

#define test_x509_verify_param_copy(field, def) \
	(to_overwrite || \
		((src->field != def) && (to_default || (dest->field == def))))

/* As above but for ID fields */

#define test_x509_verify_param_copy_id(idf, def) \
	test_x509_verify_param_copy(id->idf, def)

/* Macro to test and copy a field if necessary */

#define x509_verify_param_copy(field, def) \
	if (test_x509_verify_param_copy(field, def)) \
		dest->field = src->field

int
X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, const X509_VERIFY_PARAM *src)
{
	unsigned long inh_flags;
	int to_default, to_overwrite;
	X509_VERIFY_PARAM_ID *id;

	if (!src)
		return 1;
	id = src->id;
	inh_flags = dest->inh_flags | src->inh_flags;

	if (inh_flags & X509_VP_FLAG_ONCE)
		dest->inh_flags = 0;

	if (inh_flags & X509_VP_FLAG_LOCKED)
		return 1;

	if (inh_flags & X509_VP_FLAG_DEFAULT)
		to_default = 1;
	else
		to_default = 0;

	if (inh_flags & X509_VP_FLAG_OVERWRITE)
		to_overwrite = 1;
	else
		to_overwrite = 0;

	x509_verify_param_copy(purpose, 0);
	x509_verify_param_copy(trust, 0);
	x509_verify_param_copy(depth, -1);

	/* If overwrite or check time not set, copy across */

	if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) {
		dest->check_time = src->check_time;
		dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
		/* Don't need to copy flag: that is done below */
	}

	if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
		dest->flags = 0;

	dest->flags |= src->flags;

	if (test_x509_verify_param_copy(policies, NULL)) {
		if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
			return 0;
	}

	/* Copy the host flags if and only if we're copying the host list */
	if (test_x509_verify_param_copy_id(hosts, NULL)) {
		if (dest->id->hosts) {
			string_stack_free(dest->id->hosts);
			dest->id->hosts = NULL;
		}
		if (id->hosts) {
			dest->id->hosts =
			    sk_deep_copy(id->hosts, strdup, str_free);
			if (dest->id->hosts == NULL)
				return 0;
			dest->id->hostflags = id->hostflags;
		}
	}

	if (test_x509_verify_param_copy_id(email, NULL)) {
		if (!X509_VERIFY_PARAM_set1_email(dest, id->email,
		    id->emaillen))
			return 0;
	}

	if (test_x509_verify_param_copy_id(ip, NULL)) {
		if (!X509_VERIFY_PARAM_set1_ip(dest, id->ip, id->iplen))
			return 0;
	}

	return 1;
}

int
X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, const X509_VERIFY_PARAM *from)
{
	unsigned long save_flags = to->inh_flags;
	int ret;

	to->inh_flags |= X509_VP_FLAG_DEFAULT;
	ret = X509_VERIFY_PARAM_inherit(to, from);
	to->inh_flags = save_flags;
	return ret;
}

static int
int_x509_param_set1(char **pdest, size_t *pdestlen,  const char *src,
    size_t srclen)
{
	char *tmp;
	if (src) {
		if (srclen == 0) {
			if ((tmp = strdup(src)) == NULL)
				return 0;
			srclen = strlen(src);
		} else {
			if ((tmp = malloc(srclen)) == NULL)
				return 0;
			memcpy(tmp, src, srclen);
		}
	} else {
		tmp = NULL;
		srclen = 0;
	}
	if (*pdest)
		free(*pdest);
	*pdest = tmp;
	if (pdestlen)
		*pdestlen = srclen;
	return 1;
}

int
X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
{
	free(param->name);
	param->name = NULL;
	if (name == NULL)
		return 1;
	param->name = strdup(name);
	if (param->name)
		return 1;
	return 0;
}

int
X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
{
	param->flags |= flags;
	if (flags & X509_V_FLAG_POLICY_MASK)
		param->flags |= X509_V_FLAG_POLICY_CHECK;
	return 1;
}

int
X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags)
{
	param->flags &= ~flags;
	return 1;
}

unsigned long
X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
{
	return param->flags;
}

int
X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
{
	return X509_PURPOSE_set(&param->purpose, purpose);
}

int
X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
{
	return X509_TRUST_set(&param->trust, trust);
}

void
X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
{
	param->depth = depth;
}

void
X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
{
	param->check_time = t;
	param->flags |= X509_V_FLAG_USE_CHECK_TIME;
}

int
X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy)
{
	if (!param->policies) {
		param->policies = sk_ASN1_OBJECT_new_null();
		if (!param->policies)
			return 0;
	}
	if (!sk_ASN1_OBJECT_push(param->policies, policy))
		return 0;
	return 1;
}

int
X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
    STACK_OF(ASN1_OBJECT) *policies)
{
	int i;
	ASN1_OBJECT *oid, *doid;

	if (!param)
		return 0;
	if (param->policies)
		sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);

	if (!policies) {
		param->policies = NULL;
		return 1;
	}

	param->policies = sk_ASN1_OBJECT_new_null();
	if (!param->policies)
		return 0;

	for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
		oid = sk_ASN1_OBJECT_value(policies, i);
		doid = OBJ_dup(oid);
		if (!doid)
			return 0;
		if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
			ASN1_OBJECT_free(doid);
			return 0;
		}
	}
	param->flags |= X509_V_FLAG_POLICY_CHECK;
	return 1;
}

int
X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
    const char *name, size_t namelen)
{
	return int_x509_param_set_hosts(param->id, SET_HOST, name, namelen);
}

int
X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
    const char *name, size_t namelen)
{
	return int_x509_param_set_hosts(param->id, ADD_HOST, name, namelen);
}

void
X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param, unsigned int flags)
{
	param->id->hostflags = flags;
}

char *
X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param)
{
	return param->id->peername;
}

int
X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,  const char *email,
    size_t emaillen)
{
	return int_x509_param_set1(&param->id->email, &param->id->emaillen,
	    email, emaillen);
}

int
X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param, const unsigned char *ip,
    size_t iplen)
{
	if (iplen != 0 && iplen != 4 && iplen != 16)
		return 0;
	return int_x509_param_set1((char **)&param->id->ip, &param->id->iplen,
	    (char *)ip, iplen);
}

int
X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc)
{
	unsigned char ipout[16];
	size_t iplen;

	iplen = (size_t)a2i_ipadd(ipout, ipasc);
	if (iplen == 0)
		return 0;
	return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
}

int
X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
{
	return param->depth;
}

const char *
X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
{
	return param->name;
}

static const X509_VERIFY_PARAM_ID _empty_id = { NULL };

#define vpm_empty_id (X509_VERIFY_PARAM_ID *)&_empty_id

/*
 * Default verify parameters: these are used for various applications and can
 * be overridden by the user specified table.
 */

static const X509_VERIFY_PARAM default_table[] = {
	{
		.name = "default",
		.depth = 100,
		.trust = 0,  /* XXX This is not the default trust value */
		.id = vpm_empty_id
	},
	{
		.name = "pkcs7",
		.purpose = X509_PURPOSE_SMIME_SIGN,
		.trust = X509_TRUST_EMAIL,
		.depth = -1,
		.id = vpm_empty_id
	},
	{
		.name = "smime_sign",
		.purpose = X509_PURPOSE_SMIME_SIGN,
		.trust = X509_TRUST_EMAIL,
		.depth =  -1,
		.id = vpm_empty_id
	},
	{
		.name = "ssl_client",
		.purpose = X509_PURPOSE_SSL_CLIENT,
		.trust = X509_TRUST_SSL_CLIENT,
		.depth = -1,
		.id = vpm_empty_id
	},
	{
		.name = "ssl_server",
		.purpose = X509_PURPOSE_SSL_SERVER,
		.trust = X509_TRUST_SSL_SERVER,
		.depth = -1,
		.id = vpm_empty_id
	}
};

static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;

static int
param_cmp(const X509_VERIFY_PARAM * const *a,
    const X509_VERIFY_PARAM * const *b)
{
	return strcmp((*a)->name, (*b)->name);
}

int
X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
{
	X509_VERIFY_PARAM *ptmp;
	if (!param_table) {
		param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
		if (!param_table)
			return 0;
	} else {
		size_t idx;

		if ((idx = sk_X509_VERIFY_PARAM_find(param_table, param))
		    != -1) {
			ptmp = sk_X509_VERIFY_PARAM_value(param_table,
			    idx);
			X509_VERIFY_PARAM_free(ptmp);
			(void)sk_X509_VERIFY_PARAM_delete(param_table,
			    idx);
		}
	}
	if (!sk_X509_VERIFY_PARAM_push(param_table, param))
		return 0;
	return 1;
}

int
X509_VERIFY_PARAM_get_count(void)
{
	int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
	if (param_table)
		num += sk_X509_VERIFY_PARAM_num(param_table);
	return num;
}

const
X509_VERIFY_PARAM *X509_VERIFY_PARAM_get0(int id)
{
	int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
	if (id < num)
		return default_table + id;
	return sk_X509_VERIFY_PARAM_value(param_table, id - num);
}

const
X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
{
	X509_VERIFY_PARAM pm;
	unsigned int i, limit;

	pm.name = (char *)name;
	if (param_table) {
		size_t idx;
		if ((idx = sk_X509_VERIFY_PARAM_find(param_table, &pm)) != -1)
			return sk_X509_VERIFY_PARAM_value(param_table, idx);
	}

	limit = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
	for (i = 0; i < limit; i++) {
		if (strcmp(default_table[i].name, name) == 0) {
			return &default_table[i];
		}
	}
	return NULL;
}

void
X509_VERIFY_PARAM_table_cleanup(void)
{
	if (param_table)
		sk_X509_VERIFY_PARAM_pop_free(param_table,
		    X509_VERIFY_PARAM_free);
	param_table = NULL;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: x509_vpm.c,v 1.15 2016/12/21 15:15:45 jsing Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project 2004.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2004 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			#include <stdio.h>
60			#include <string.h>
61
62			#include <openssl/buffer.h>
63			#include <openssl/crypto.h>
64			#include <openssl/lhash.h>
65			#include <openssl/stack.h>
66			#include <openssl/x509.h>
67			#include <openssl/x509v3.h>
68
69			#include "vpm_int.h"
70
71			/* X509_VERIFY_PARAM functions */
72
73			int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM param, const char email,
74			size_t emaillen);
75			int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM param, const unsigned char ip,
76			size_t iplen);
77
78			#define SET_HOST 0
79			#define ADD_HOST 1
80
81			static void
82			str_free(char *s)
83			{
84			free(s);
85			}
86
87			#define string_stack_free(sk) sk_OPENSSL_STRING_pop_free(sk, str_free)
88
89
90			/*
91			* Post 1.0.1 sk function "deep_copy". For the moment we simply make
92			* these take void * and use them directly without a glorious blob of
93			* obfuscating macros of dubious value in front of them. All this in
94			* preparation for a rototilling of safestack.h (likely inspired by
95			* this).
96			*/
97			static void *
98			sk_deep_copy(void sk_void, void copy_func_void, void *free_func_void)
99			{
100			_STACK *sk = sk_void;
101			void (copy_func)(void *) = copy_func_void;
102			void (free_func)(void ) = free_func_void;
103			_STACK *ret = sk_dup(sk);
104
105			if (ret == NULL)
106			return NULL;
107
108			size_t i;
109			for (i = 0; i < ret->num; i++) {
110			if (ret->data[i] == NULL)
111			continue;
112			ret->data[i] = copy_func(ret->data[i]);
113			if (ret->data[i] == NULL) {
114			size_t j;
115			for (j = 0; j < i; j++) {
116			if (ret->data[j] != NULL)
117			free_func(ret->data[j]);
118			}
119			sk_free(ret);
120			return NULL;
121			}
122			}
123
124			return ret;
125			}
126
127			static int
128			int_x509_param_set_hosts(X509_VERIFY_PARAM_ID *id, int mode,
129			const char *name, size_t namelen)
130			{
131			char *copy;
132
133			/*
134			* Refuse names with embedded NUL bytes.
135			* XXX: Do we need to push an error onto the error stack?
136			*/
137			if (name && memchr(name, '\0', namelen))
138			return 0;
139
140			if (mode == SET_HOST && id->hosts) {
141			string_stack_free(id->hosts);
142			id->hosts = NULL;
143			}
144			if (name == NULL \|\| namelen == 0)
145			return 1;
146			copy = strndup(name, namelen);
147			if (copy == NULL)
148			return 0;
149
150			if (id->hosts == NULL &&
151			(id->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
152			free(copy);
153			return 0;
154			}
155
156			if (!sk_OPENSSL_STRING_push(id->hosts, copy)) {
157			free(copy);
158			if (sk_OPENSSL_STRING_num(id->hosts) == 0) {
159			sk_OPENSSL_STRING_free(id->hosts);
160			id->hosts = NULL;
161			}
162			return 0;
163			}
164
165			return 1;
166			}
167
168			static void
169			x509_verify_param_zero(X509_VERIFY_PARAM *param)
170			{
171			X509_VERIFY_PARAM_ID *paramid;
172	✗✓	18710	if (!param)
173			return;
174		9355	param->name = NULL;
175		9355	param->purpose = 0;
176		9355	param->trust = 0;
177			/param->inh_flags = X509_VP_FLAG_DEFAULT;/
178		9355	param->inh_flags = 0;
179		9355	param->flags = 0;
180		9355	param->depth = -1;
181	✗✓	9355	if (param->policies) {
182			sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
183			param->policies = NULL;
184			}
185		9355	paramid = param->id;
186	✗✓	9355	if (paramid->hosts) {
187			string_stack_free(paramid->hosts);
188			paramid->hosts = NULL;
189			}
190		9355	free(paramid->peername);
191		9355	paramid->peername = NULL;
192		9355	free(paramid->email);
193		9355	paramid->email = NULL;
194		9355	paramid->emaillen = 0;
195		9355	free(paramid->ip);
196		9355	paramid->ip = NULL;
197		9355	paramid->iplen = 0;
198		18710	}
199
200			X509_VERIFY_PARAM *
201			X509_VERIFY_PARAM_new(void)
202			{
203			X509_VERIFY_PARAM *param;
204			X509_VERIFY_PARAM_ID *paramid;
205		9382	param = calloc(1, sizeof(X509_VERIFY_PARAM));
206	✗✓	4691	if (param == NULL)
207			return NULL;
208		4691	paramid = calloc (1, sizeof(X509_VERIFY_PARAM_ID));
209	✗✓	4691	if (paramid == NULL) {
210			free(param);
211			return NULL;
212			}
213		4691	param->id = paramid;
214		4691	x509_verify_param_zero(param);
215		4691	return param;
216		4691	}
217
218			void
219			X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
220			{
221	✓✗	9328	if (param == NULL)
222			return;
223		4664	x509_verify_param_zero(param);
224		4664	free(param->id);
225		4664	free(param);
226		9328	}
227
228			/* This function determines how parameters are "inherited" from one structure
229			* to another. There are several different ways this can happen.
230			*
231			* 1. If a child structure needs to have its values initialized from a parent
232			* they are simply copied across. For example SSL_CTX copied to SSL.
233			* 2. If the structure should take on values only if they are currently unset.
234			* For example the values in an SSL structure will take appropriate value
235			* for SSL servers or clients but only if the application has not set new
236			* ones.
237			*
238			* The "inh_flags" field determines how this function behaves.
239			*
240			* Normally any values which are set in the default are not copied from the
241			* destination and verify flags are ORed together.
242			*
243			* If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
244			* to the destination. Effectively the values in "to" become default values
245			* which will be used only if nothing new is set in "from".
246			*
247			* If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
248			* they are set or not. Flags is still Ored though.
249			*
250			* If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
251			* of ORed.
252			*
253			* If X509_VP_FLAG_LOCKED is set then no values are copied.
254			*
255			* If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
256			* after the next call.
257			*/
258
259			/* Macro to test if a field should be copied from src to dest */
260
261			#define test_x509_verify_param_copy(field, def) \
262			(to_overwrite \|\| \
263			((src->field != def) && (to_default \|\| (dest->field == def))))
264
265			/* As above but for ID fields */
266
267			#define test_x509_verify_param_copy_id(idf, def) \
268			test_x509_verify_param_copy(id->idf, def)
269
270			/* Macro to test and copy a field if necessary */
271
272			#define x509_verify_param_copy(field, def) \
273			if (test_x509_verify_param_copy(field, def)) \
274			dest->field = src->field
275
276			int
277			X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM dest, const X509_VERIFY_PARAM src)
278			{
279			unsigned long inh_flags;
280			int to_default, to_overwrite;
281			X509_VERIFY_PARAM_ID *id;
282
283	✗✓	13280	if (!src)
284			return 1;
285		6640	id = src->id;
286		6640	inh_flags = dest->inh_flags \| src->inh_flags;
287
288	✗✓	6640	if (inh_flags & X509_VP_FLAG_ONCE)
289			dest->inh_flags = 0;
290
291	✗✓	6640	if (inh_flags & X509_VP_FLAG_LOCKED)
292			return 1;
293
294	✓✓	6640	if (inh_flags & X509_VP_FLAG_DEFAULT)
295		1125	to_default = 1;
296			else
297			to_default = 0;
298
299	✗✓	6640	if (inh_flags & X509_VP_FLAG_OVERWRITE)
300			to_overwrite = 1;
301			else
302			to_overwrite = 0;
303
304	✓✗✓✓ ✓✗✓✗	16691	x509_verify_param_copy(purpose, 0);
305	✓✗✓✓ ✓✗✓✗	16691	x509_verify_param_copy(trust, 0);
306	✓✗✓✓ ✓✓✓✗	17587	x509_verify_param_copy(depth, -1);
307
308			/* If overwrite or check time not set, copy across */
309
310	✓✗✓✗	13280	if (to_overwrite \|\| !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) {
311		6640	dest->check_time = src->check_time;
312		6640	dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
313			/* Don't need to copy flag: that is done below */
314		6640	}
315
316	✗✓	6640	if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
317			dest->flags = 0;
318
319		6640	dest->flags \|= src->flags;
320
321	✓✗✗✓ ✗✗✗✗	13280	if (test_x509_verify_param_copy(policies, NULL)) {
322			if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
323			return 0;
324			}
325
326			/* Copy the host flags if and only if we're copying the host list */
327	✓✗✗✓ ✗✗✗✗	13280	if (test_x509_verify_param_copy_id(hosts, NULL)) {
328			if (dest->id->hosts) {
329			string_stack_free(dest->id->hosts);
330			dest->id->hosts = NULL;
331			}
332			if (id->hosts) {
333			dest->id->hosts =
334			sk_deep_copy(id->hosts, strdup, str_free);
335			if (dest->id->hosts == NULL)
336			return 0;
337			dest->id->hostflags = id->hostflags;
338			}
339			}
340
341	✓✗✗✓ ✗✗✗✗	13280	if (test_x509_verify_param_copy_id(email, NULL)) {
342			if (!X509_VERIFY_PARAM_set1_email(dest, id->email,
343			id->emaillen))
344			return 0;
345			}
346
347	✓✗✗✓ ✗✗✗✗	13280	if (test_x509_verify_param_copy_id(ip, NULL)) {
348			if (!X509_VERIFY_PARAM_set1_ip(dest, id->ip, id->iplen))
349			return 0;
350			}
351
352		6640	return 1;
353		6640	}
354
355			int
356			X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM to, const X509_VERIFY_PARAM from)
357			{
358		2250	unsigned long save_flags = to->inh_flags;
359			int ret;
360
361		1125	to->inh_flags \|= X509_VP_FLAG_DEFAULT;
362		1125	ret = X509_VERIFY_PARAM_inherit(to, from);
363		1125	to->inh_flags = save_flags;
364		1125	return ret;
365			}
366
367			static int
368			int_x509_param_set1(char *pdest, size_t pdestlen, const char *src,
369			size_t srclen)
370			{
371			char *tmp;
372			if (src) {
373			if (srclen == 0) {
374			if ((tmp = strdup(src)) == NULL)
375			return 0;
376			srclen = strlen(src);
377			} else {
378			if ((tmp = malloc(srclen)) == NULL)
379			return 0;
380			memcpy(tmp, src, srclen);
381			}
382			} else {
383			tmp = NULL;
384			srclen = 0;
385			}
386			if (*pdest)
387			free(*pdest);
388			*pdest = tmp;
389			if (pdestlen)
390			*pdestlen = srclen;
391			return 1;
392			}
393
394			int
395			X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM param, const char name)
396			{
397			free(param->name);
398			param->name = NULL;
399			if (name == NULL)
400			return 1;
401			param->name = strdup(name);
402			if (param->name)
403			return 1;
404			return 0;
405			}
406
407			int
408			X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
409			{
410		248	param->flags \|= flags;
411	✓✓	124	if (flags & X509_V_FLAG_POLICY_MASK)
412		2	param->flags \|= X509_V_FLAG_POLICY_CHECK;
413		124	return 1;
414			}
415
416			int
417			X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags)
418			{
419			param->flags &= ~flags;
420			return 1;
421			}
422
423			unsigned long
424			X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
425			{
426			return param->flags;
427			}
428
429			int
430			X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
431			{
432			return X509_PURPOSE_set(&param->purpose, purpose);
433			}
434
435			int
436			X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
437			{
438			return X509_TRUST_set(&param->trust, trust);
439			}
440
441			void
442			X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
443			{
444		32	param->depth = depth;
445		16	}
446
447			void
448			X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
449			{
450			param->check_time = t;
451			param->flags \|= X509_V_FLAG_USE_CHECK_TIME;
452			}
453
454			int
455			X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM param, ASN1_OBJECT policy)
456			{
457			if (!param->policies) {
458			param->policies = sk_ASN1_OBJECT_new_null();
459			if (!param->policies)
460			return 0;
461			}
462			if (!sk_ASN1_OBJECT_push(param->policies, policy))
463			return 0;
464			return 1;
465			}
466
467			int
468			X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
469			STACK_OF(ASN1_OBJECT) *policies)
470			{
471			int i;
472			ASN1_OBJECT oid, doid;
473
474			if (!param)
475			return 0;
476			if (param->policies)
477			sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
478
479			if (!policies) {
480			param->policies = NULL;
481			return 1;
482			}
483
484			param->policies = sk_ASN1_OBJECT_new_null();
485			if (!param->policies)
486			return 0;
487
488			for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
489			oid = sk_ASN1_OBJECT_value(policies, i);
490			doid = OBJ_dup(oid);
491			if (!doid)
492			return 0;
493			if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
494			ASN1_OBJECT_free(doid);
495			return 0;
496			}
497			}
498			param->flags \|= X509_V_FLAG_POLICY_CHECK;
499			return 1;
500			}
501
502			int
503			X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
504			const char *name, size_t namelen)
505			{
506			return int_x509_param_set_hosts(param->id, SET_HOST, name, namelen);
507			}
508
509			int
510			X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
511			const char *name, size_t namelen)
512			{
513			return int_x509_param_set_hosts(param->id, ADD_HOST, name, namelen);
514			}
515
516			void
517			X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param, unsigned int flags)
518			{
519			param->id->hostflags = flags;
520			}
521
522			char *
523			X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param)
524			{
525			return param->id->peername;
526			}
527
528			int
529			X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM param, const char email,
530			size_t emaillen)
531			{
532			return int_x509_param_set1(&param->id->email, &param->id->emaillen,
533			email, emaillen);
534			}
535
536			int
537			X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM param, const unsigned char ip,
538			size_t iplen)
539			{
540			if (iplen != 0 && iplen != 4 && iplen != 16)
541			return 0;
542			return int_x509_param_set1((char **)&param->id->ip, &param->id->iplen,
543			(char *)ip, iplen);
544			}
545
546			int
547			X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM param, const char ipasc)
548			{
549			unsigned char ipout[16];
550			size_t iplen;
551
552			iplen = (size_t)a2i_ipadd(ipout, ipasc);
553			if (iplen == 0)
554			return 0;
555			return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
556			}
557
558			int
559			X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
560			{
561			return param->depth;
562			}
563
564			const char *
565			X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
566			{
567			return param->name;
568			}
569
570			static const X509_VERIFY_PARAM_ID _empty_id = { NULL };
571
572			#define vpm_empty_id (X509_VERIFY_PARAM_ID *)&_empty_id
573
574			/*
575			* Default verify parameters: these are used for various applications and can
576			* be overridden by the user specified table.
577			*/
578
579			static const X509_VERIFY_PARAM default_table[] = {
580			{
581			.name = "default",
582			.depth = 100,
583			.trust = 0, /* XXX This is not the default trust value */
584			.id = vpm_empty_id
585			},
586			{
587			.name = "pkcs7",
588			.purpose = X509_PURPOSE_SMIME_SIGN,
589			.trust = X509_TRUST_EMAIL,
590			.depth = -1,
591			.id = vpm_empty_id
592			},
593			{
594			.name = "smime_sign",
595			.purpose = X509_PURPOSE_SMIME_SIGN,
596			.trust = X509_TRUST_EMAIL,
597			.depth = -1,
598			.id = vpm_empty_id
599			},
600			{
601			.name = "ssl_client",
602			.purpose = X509_PURPOSE_SSL_CLIENT,
603			.trust = X509_TRUST_SSL_CLIENT,
604			.depth = -1,
605			.id = vpm_empty_id
606			},
607			{
608			.name = "ssl_server",
609			.purpose = X509_PURPOSE_SSL_SERVER,
610			.trust = X509_TRUST_SSL_SERVER,
611			.depth = -1,
612			.id = vpm_empty_id
613			}
614			};
615
616			static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
617
618			static int
619			param_cmp(const X509_VERIFY_PARAM * const *a,
620			const X509_VERIFY_PARAM * const *b)
621			{
622			return strcmp((a)->name, (b)->name);
623			}
624
625			int
626			X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
627			{
628			X509_VERIFY_PARAM *ptmp;
629			if (!param_table) {
630			param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
631			if (!param_table)
632			return 0;
633			} else {
634			size_t idx;
635
636			if ((idx = sk_X509_VERIFY_PARAM_find(param_table, param))
637			!= -1) {
638			ptmp = sk_X509_VERIFY_PARAM_value(param_table,
639			idx);
640			X509_VERIFY_PARAM_free(ptmp);
641			(void)sk_X509_VERIFY_PARAM_delete(param_table,
642			idx);
643			}
644			}
645			if (!sk_X509_VERIFY_PARAM_push(param_table, param))
646			return 0;
647			return 1;
648			}
649
650			int
651			X509_VERIFY_PARAM_get_count(void)
652			{
653			int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
654			if (param_table)
655			num += sk_X509_VERIFY_PARAM_num(param_table);
656			return num;
657			}
658
659			const
660			X509_VERIFY_PARAM *X509_VERIFY_PARAM_get0(int id)
661			{
662			int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
663			if (id < num)
664			return default_table + id;
665			return sk_X509_VERIFY_PARAM_value(param_table, id - num);
666			}
667
668			const
669			X509_VERIFY_PARAM X509_VERIFY_PARAM_lookup(const char name)
670			{
671		5092	X509_VERIFY_PARAM pm;
672			unsigned int i, limit;
673
674		2546	pm.name = (char *)name;
675	✗✓	2546	if (param_table) {
676			size_t idx;
677			if ((idx = sk_X509_VERIFY_PARAM_find(param_table, &pm)) != -1)
678			return sk_X509_VERIFY_PARAM_value(param_table, idx);
679			}
680
681			limit = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
682	✓✗	14076	for (i = 0; i < limit; i++) {
683	✓✓	7038	if (strcmp(default_table[i].name, name) == 0) {
684		2546	return &default_table[i];
685			}
686			}
687			return NULL;
688		2546	}
689
690			void
691			X509_VERIFY_PARAM_table_cleanup(void)
692			{
693			if (param_table)
694			sk_X509_VERIFY_PARAM_pop_free(param_table,
695			X509_VERIFY_PARAM_free);
696			param_table = NULL;
697			}