crypto/x509/x509_vpm.c - boringssl - Git at Google

 /* 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 <openssl/buf.h>
 #include <openssl/lhash.h>
 #include <openssl/mem.h>
 #include <openssl/obj.h>
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>

 #include "vpm_int.h"

 /* X509_VERIFY_PARAM functions */

 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->host)
 		{
 		OPENSSL_free(paramid->host);
 		paramid->host = NULL;
 		paramid->hostlen = 0;
 		}
 	if (paramid->email)
 		{
 		OPENSSL_free(paramid->email);
 		paramid->email = NULL;
 		paramid->emaillen = 0;
 		}
 	if (paramid->ip)
 		{
 		OPENSSL_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 = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
 	if (!param)
 		return NULL;
 	paramid = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM_ID));
 	if (!paramid)
 		{
 		OPENSSL_free(param);
 		return NULL;
 		}
 	memset(param, 0, sizeof(X509_VERIFY_PARAM));
 	memset(paramid, 0, sizeof(X509_VERIFY_PARAM_ID));
 	param->id = paramid;
 	x509_verify_param_zero(param);
 	return param;
 	}

 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
 	{
 	x509_verify_param_zero(param);
 	OPENSSL_free(param->id);
 	OPENSSL_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;
 		}

 	if (test_x509_verify_param_copy_id(host, NULL))
 		{
 		if (!X509_VERIFY_PARAM_set1_host(dest, id->host, id->hostlen))
 			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(unsigned char **pdest, size_t *pdestlen,
 				const unsigned char *src, size_t srclen)
 	{
 	void *tmp;
 	if (src)
 		{
 		if (srclen == 0)
 			{
 			tmp = BUF_strdup((char *)src);
 			srclen = strlen((char *)src);
 			}
 		else
 			tmp = BUF_memdup(src, srclen);
 		if (!tmp)
 			return 0;
 		}
 	else
 		{
 		tmp = NULL;
 		srclen = 0;
 		}
 	if (*pdest)
 		OPENSSL_free(*pdest);
 	*pdest = tmp;
 	if (pdestlen)
 		*pdestlen = srclen;
 	return 1;
 	}

 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
 	{
 	if (param->name)
 		OPENSSL_free(param->name);
 	param->name = BUF_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)
 	{
 	size_t 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 unsigned char *name, size_t namelen)
 	{
 	return int_x509_param_set1(&param->id->host, &param->id->hostlen,
 					name, namelen);
 	}

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

 int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
 				const unsigned 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(&param->id->ip, &param->id->iplen, ip, iplen);
 	}

 int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc)
 	{
 	unsigned char ipout[16];
 	int iplen;
 	iplen = a2i_ipadd(ipout, ipasc);
 	if (iplen == 0)
 		return 0;
 	return X509_VERIFY_PARAM_set1_ip(param, ipout, (size_t)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 X509_VERIFY_PARAM_ID _empty_id = {NULL, 0, 0U, NULL, 0, NULL, 0};

 #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.
  * NB: the 'name' field *must* be in alphabetical order because it
  * will be searched using OBJ_search.
  */

 static const X509_VERIFY_PARAM default_table[] = {
 	{
 	(char *) "default",	/* X509 default parameters */
 	0,		/* Check time */
 	0,		/* internal flags */
 	0,		/* flags */
 	0,		/* purpose */
 	0,		/* trust */
 	100,		/* depth */
 	NULL,		/* policies */
 	vpm_empty_id
 	},
 	{
 	(char *) "pkcs7",			/* S/MIME sign parameters */
 	0,				/* Check time */
 	0,				/* internal flags */
 	0,				/* flags */
 	X509_PURPOSE_SMIME_SIGN,	/* purpose */
 	X509_TRUST_EMAIL,		/* trust */
 	-1,				/* depth */
 	NULL,				/* policies */
 	vpm_empty_id
 	},
 	{
 	(char *) "smime_sign",			/* S/MIME sign parameters */
 	0,				/* Check time */
 	0,				/* internal flags */
 	0,				/* flags */
 	X509_PURPOSE_SMIME_SIGN,	/* purpose */
 	X509_TRUST_EMAIL,		/* trust */
 	-1,				/* depth */
 	NULL,				/* policies */
 	vpm_empty_id
 	},
 	{
 	(char *) "ssl_client",			/* SSL/TLS client parameters */
 	0,				/* Check time */
 	0,				/* internal flags */
 	0,				/* flags */
 	X509_PURPOSE_SSL_CLIENT,	/* purpose */
 	X509_TRUST_SSL_CLIENT,		/* trust */
 	-1,				/* depth */
 	NULL,				/* policies */
 	vpm_empty_id
 	},
 	{
 	(char *) "ssl_server",			/* SSL/TLS server parameters */
 	0,				/* Check time */
 	0,				/* internal flags */
 	0,				/* flags */
 	X509_PURPOSE_SSL_SERVER,	/* purpose */
 	X509_TRUST_SSL_SERVER,		/* trust */
 	-1,				/* depth */
 	NULL,				/* policies */
 	vpm_empty_id
 	}};

 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;

 static int param_cmp(const X509_VERIFY_PARAM **a,
 			const X509_VERIFY_PARAM **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 (sk_X509_VERIFY_PARAM_find(param_table, &idx, param))
 			{
 			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 i, limit;

 	pm.name = (char *)name;
 	if (param_table)
 		{
 		size_t idx;
 		if (sk_X509_VERIFY_PARAM_find(param_table, &idx, &pm))
 			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;
 	}
	/* 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 <openssl/buf.h>
	#include <openssl/lhash.h>
	#include <openssl/mem.h>
	#include <openssl/obj.h>
	#include <openssl/x509.h>
	#include <openssl/x509v3.h>

	#include "vpm_int.h"

	/* X509_VERIFY_PARAM functions */

	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->host)
	{
	OPENSSL_free(paramid->host);
	paramid->host = NULL;
	paramid->hostlen = 0;
	}
	if (paramid->email)
	{
	OPENSSL_free(paramid->email);
	paramid->email = NULL;
	paramid->emaillen = 0;
	}
	if (paramid->ip)
	{
	OPENSSL_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 = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
	if (!param)
	return NULL;
	paramid = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM_ID));
	if (!paramid)
	{
	OPENSSL_free(param);
	return NULL;
	}
	memset(param, 0, sizeof(X509_VERIFY_PARAM));
	memset(paramid, 0, sizeof(X509_VERIFY_PARAM_ID));
	param->id = paramid;
	x509_verify_param_zero(param);
	return param;
	}

	void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
	{
	x509_verify_param_zero(param);
	OPENSSL_free(param->id);
	OPENSSL_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;
	}

	if (test_x509_verify_param_copy_id(host, NULL))
	{
	if (!X509_VERIFY_PARAM_set1_host(dest, id->host, id->hostlen))
	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(unsigned char *pdest, size_t pdestlen,
	const unsigned char *src, size_t srclen)
	{
	void *tmp;
	if (src)
	{
	if (srclen == 0)
	{
	tmp = BUF_strdup((char *)src);
	srclen = strlen((char *)src);
	}
	else
	tmp = BUF_memdup(src, srclen);
	if (!tmp)
	return 0;
	}
	else
	{
	tmp = NULL;
	srclen = 0;
	}
	if (*pdest)
	OPENSSL_free(*pdest);
	*pdest = tmp;
	if (pdestlen)
	*pdestlen = srclen;
	return 1;
	}

	int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM param, const char name)
	{
	if (param->name)
	OPENSSL_free(param->name);
	param->name = BUF_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)
	{
	size_t 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 unsigned char *name, size_t namelen)
	{
	return int_x509_param_set1(&param->id->host, &param->id->hostlen,
	name, namelen);
	}

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

	int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
	const unsigned 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(&param->id->ip, &param->id->iplen, ip, iplen);
	}

	int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM param, const char ipasc)
	{
	unsigned char ipout[16];
	int iplen;
	iplen = a2i_ipadd(ipout, ipasc);
	if (iplen == 0)
	return 0;
	return X509_VERIFY_PARAM_set1_ip(param, ipout, (size_t)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 X509_VERIFY_PARAM_ID _empty_id = {NULL, 0, 0U, NULL, 0, NULL, 0};

	#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.
	* NB: the 'name' field must be in alphabetical order because it
	* will be searched using OBJ_search.
	*/

	static const X509_VERIFY_PARAM default_table[] = {
	{
	(char ) "default", / X509 default parameters */
	0, /* Check time */
	0, /* internal flags */
	0, /* flags */
	0, /* purpose */
	0, /* trust */
	100, /* depth */
	NULL, /* policies */
	vpm_empty_id
	},
	{
	(char ) "pkcs7", / S/MIME sign parameters */
	0, /* Check time */
	0, /* internal flags */
	0, /* flags */
	X509_PURPOSE_SMIME_SIGN, /* purpose */
	X509_TRUST_EMAIL, /* trust */
	-1, /* depth */
	NULL, /* policies */
	vpm_empty_id
	},
	{
	(char ) "smime_sign", / S/MIME sign parameters */
	0, /* Check time */
	0, /* internal flags */
	0, /* flags */
	X509_PURPOSE_SMIME_SIGN, /* purpose */
	X509_TRUST_EMAIL, /* trust */
	-1, /* depth */
	NULL, /* policies */
	vpm_empty_id
	},
	{
	(char ) "ssl_client", / SSL/TLS client parameters */
	0, /* Check time */
	0, /* internal flags */
	0, /* flags */
	X509_PURPOSE_SSL_CLIENT, /* purpose */
	X509_TRUST_SSL_CLIENT, /* trust */
	-1, /* depth */
	NULL, /* policies */
	vpm_empty_id
	},
	{
	(char ) "ssl_server", / SSL/TLS server parameters */
	0, /* Check time */
	0, /* internal flags */
	0, /* flags */
	X509_PURPOSE_SSL_SERVER, /* purpose */
	X509_TRUST_SSL_SERVER, /* trust */
	-1, /* depth */
	NULL, /* policies */
	vpm_empty_id
	}};

	static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;

	static int param_cmp(const X509_VERIFY_PARAM **a,
	const X509_VERIFY_PARAM **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 (sk_X509_VERIFY_PARAM_find(param_table, &idx, param))
	{
	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 i, limit;

	pm.name = (char *)name;
	if (param_table)
	{
	size_t idx;
	if (sk_X509_VERIFY_PARAM_find(param_table, &idx, &pm))
	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;
	}