crypto/x509/x509_vpm.c - third_party/openssl - Git at Google

 /*
  * Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <stdio.h>

 #include "internal/cryptlib.h"
 #include <openssl/crypto.h>
 #include <openssl/buffer.h>
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 #include "crypto/x509.h"

 #include "x509_local.h"

 /* X509_VERIFY_PARAM functions */

 #define SET_HOST 0
 #define ADD_HOST 1

 static char *str_copy(const char *s)
 {
     return OPENSSL_strdup(s);
 }

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

 static int int_x509_param_set_hosts(X509_VERIFY_PARAM *vpm, int mode,
                                     const char *name, size_t namelen)
 {
     char *copy;

     /*
      * Refuse names with embedded NUL bytes, except perhaps as final byte.
      * XXX: Do we need to push an error onto the error stack?
      */
     if (namelen == 0 || name == NULL)
         namelen = name ? strlen(name) : 0;
     else if (name && memchr(name, '\0', namelen > 1 ? namelen - 1 : namelen))
         return 0;
     if (namelen > 0 && name[namelen - 1] == '\0')
         --namelen;

     if (mode == SET_HOST) {
         sk_OPENSSL_STRING_pop_free(vpm->hosts, str_free);
         vpm->hosts = NULL;
     }
     if (name == NULL || namelen == 0)
         return 1;

     copy = OPENSSL_strndup(name, namelen);
     if (copy == NULL)
         return 0;

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

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

     return 1;
 }


 X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
 {
     X509_VERIFY_PARAM *param;

     param = OPENSSL_zalloc(sizeof(*param));
     if (param == NULL) {
         X509err(X509_F_X509_VERIFY_PARAM_NEW, ERR_R_MALLOC_FAILURE);
         return NULL;
     }
     param->trust = X509_TRUST_DEFAULT;
     /* param->inh_flags = X509_VP_FLAG_DEFAULT; */
     param->depth = -1;
     param->auth_level = -1; /* -1 means unset, 0 is explicit */
     return param;
 }

 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
 {
     if (param == NULL)
         return;
     sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
     sk_OPENSSL_STRING_pop_free(param->hosts, str_free);
     OPENSSL_free(param->peername);
     OPENSSL_free(param->email);
     OPENSSL_free(param->ip);
     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))))

 /* 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;
     if (!src)
         return 1;
     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, X509_TRUST_DEFAULT);
     x509_verify_param_copy(depth, -1);
     x509_verify_param_copy(auth_level, -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(hosts, NULL)) {
         sk_OPENSSL_STRING_pop_free(dest->hosts, str_free);
         dest->hosts = NULL;
         if (src->hosts) {
             dest->hosts =
                 sk_OPENSSL_STRING_deep_copy(src->hosts, str_copy, str_free);
             if (dest->hosts == NULL)
                 return 0;
             dest->hostflags = src->hostflags;
         }
     }

     if (test_x509_verify_param_copy(email, NULL)) {
         if (!X509_VERIFY_PARAM_set1_email(dest, src->email, src->emaillen))
             return 0;
     }

     if (test_x509_verify_param_copy(ip, NULL)) {
         if (!X509_VERIFY_PARAM_set1_ip(dest, src->ip, src->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)
 {
     void *tmp;
     if (src) {
         if (srclen == 0)
             srclen = strlen(src);

         tmp = OPENSSL_memdup(src, srclen);
         if (tmp == NULL)
             return 0;
     } else {
         tmp = NULL;
         srclen = 0;
     }
     OPENSSL_free(*pdest);
     *pdest = tmp;
     if (pdestlen != NULL)
         *pdestlen = srclen;
     return 1;
 }

 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
 {
     OPENSSL_free(param->name);
     param->name = OPENSSL_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(const X509_VERIFY_PARAM *param)
 {
     return param->flags;
 }

 uint32_t X509_VERIFY_PARAM_get_inh_flags(const X509_VERIFY_PARAM *param)
 {
     return param->inh_flags;
 }

 int X509_VERIFY_PARAM_set_inh_flags(X509_VERIFY_PARAM *param, uint32_t flags)
 {
     param->inh_flags = flags;
     return 1;
 }

 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_auth_level(X509_VERIFY_PARAM *param, int auth_level)
 {
     param->auth_level = auth_level;
 }

 time_t X509_VERIFY_PARAM_get_time(const X509_VERIFY_PARAM *param)
 {
     return param->check_time;
 }

 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 == NULL) {
         param->policies = sk_ASN1_OBJECT_new_null();
         if (param->policies == NULL)
             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 == NULL)
         return 0;
     sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);

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

     param->policies = sk_ASN1_OBJECT_new_null();
     if (param->policies == NULL)
         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, 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, ADD_HOST, name, namelen);
 }

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

 unsigned int X509_VERIFY_PARAM_get_hostflags(const X509_VERIFY_PARAM *param)
 {
     return param->hostflags;
 }

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

 /*
  * Move peername from one param structure to another, freeing any name present
  * at the target.  If the source is a NULL parameter structure, free and zero
  * the target peername.
  */
 void X509_VERIFY_PARAM_move_peername(X509_VERIFY_PARAM *to,
                                      X509_VERIFY_PARAM *from)
 {
     char *peername = (from != NULL) ? from->peername : NULL;

     if (to->peername != peername) {
         OPENSSL_free(to->peername);
         to->peername = peername;
     }
     if (from)
         from->peername = NULL;
 }

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

 int X509_VERIFY_PARAM_get_auth_level(const X509_VERIFY_PARAM *param)
 {
     return param->auth_level;
 }

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

 #define vpm_empty_id NULL, 0U, NULL, NULL, 0, NULL, 0

 /*
  * 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[] = {
     {
      "default",                 /* X509 default parameters */
      0,                         /* Check time */
      0,                         /* internal flags */
      X509_V_FLAG_TRUSTED_FIRST, /* flags */
      0,                         /* purpose */
      0,                         /* trust */
      100,                       /* depth */
      -1,                        /* auth_level */
      NULL,                      /* policies */
      vpm_empty_id},
     {
      "pkcs7",                   /* S/MIME sign parameters */
      0,                         /* Check time */
      0,                         /* internal flags */
      0,                         /* flags */
      X509_PURPOSE_SMIME_SIGN,   /* purpose */
      X509_TRUST_EMAIL,          /* trust */
      -1,                        /* depth */
      -1,                        /* auth_level */
      NULL,                      /* policies */
      vpm_empty_id},
     {
      "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 */
      -1,                        /* auth_level */
      NULL,                      /* policies */
      vpm_empty_id},
     {
      "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 */
      -1,                        /* auth_level */
      NULL,                      /* policies */
      vpm_empty_id},
     {
      "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 */
      -1,                        /* auth_level */
      NULL,                      /* policies */
      vpm_empty_id}
 };

 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;

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

 DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
 IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);

 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)
 {
     int idx;
     X509_VERIFY_PARAM *ptmp;
     if (param_table == NULL) {
         param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
         if (param_table == NULL)
             return 0;
     } else {
         idx = sk_X509_VERIFY_PARAM_find(param_table, param);
         if (idx >= 0) {
             ptmp = sk_X509_VERIFY_PARAM_delete(param_table, idx);
             X509_VERIFY_PARAM_free(ptmp);
         }
     }
     if (!sk_X509_VERIFY_PARAM_push(param_table, param))
         return 0;
     return 1;
 }

 int X509_VERIFY_PARAM_get_count(void)
 {
     int num = OSSL_NELEM(default_table);
     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 = OSSL_NELEM(default_table);
     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)
 {
     int idx;
     X509_VERIFY_PARAM pm;

     pm.name = (char *)name;
     if (param_table != NULL) {
         idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
         if (idx >= 0)
             return sk_X509_VERIFY_PARAM_value(param_table, idx);
     }
     return OBJ_bsearch_table(&pm, default_table, OSSL_NELEM(default_table));
 }

 void X509_VERIFY_PARAM_table_cleanup(void)
 {
     sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free);
     param_table = NULL;
 }
	/*
	* Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <stdio.h>

	#include "internal/cryptlib.h"
	#include <openssl/crypto.h>
	#include <openssl/buffer.h>
	#include <openssl/x509.h>
	#include <openssl/x509v3.h>
	#include "crypto/x509.h"

	#include "x509_local.h"

	/* X509_VERIFY_PARAM functions */

	#define SET_HOST 0
	#define ADD_HOST 1

	static char str_copy(const char s)
	{
	return OPENSSL_strdup(s);
	}

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

	static int int_x509_param_set_hosts(X509_VERIFY_PARAM *vpm, int mode,
	const char *name, size_t namelen)
	{
	char *copy;

	/*
	* Refuse names with embedded NUL bytes, except perhaps as final byte.
	* XXX: Do we need to push an error onto the error stack?
	*/
	if (namelen == 0 \|\| name == NULL)
	namelen = name ? strlen(name) : 0;
	else if (name && memchr(name, '\0', namelen > 1 ? namelen - 1 : namelen))
	return 0;
	if (namelen > 0 && name[namelen - 1] == '\0')
	--namelen;

	if (mode == SET_HOST) {
	sk_OPENSSL_STRING_pop_free(vpm->hosts, str_free);
	vpm->hosts = NULL;
	}
	if (name == NULL \|\| namelen == 0)
	return 1;

	copy = OPENSSL_strndup(name, namelen);
	if (copy == NULL)
	return 0;

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

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

	return 1;
	}


	X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
	{
	X509_VERIFY_PARAM *param;

	param = OPENSSL_zalloc(sizeof(*param));
	if (param == NULL) {
	X509err(X509_F_X509_VERIFY_PARAM_NEW, ERR_R_MALLOC_FAILURE);
	return NULL;
	}
	param->trust = X509_TRUST_DEFAULT;
	/* param->inh_flags = X509_VP_FLAG_DEFAULT; */
	param->depth = -1;
	param->auth_level = -1; /* -1 means unset, 0 is explicit */
	return param;
	}

	void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
	{
	if (param == NULL)
	return;
	sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
	sk_OPENSSL_STRING_pop_free(param->hosts, str_free);
	OPENSSL_free(param->peername);
	OPENSSL_free(param->email);
	OPENSSL_free(param->ip);
	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))))

	/* 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;
	if (!src)
	return 1;
	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, X509_TRUST_DEFAULT);
	x509_verify_param_copy(depth, -1);
	x509_verify_param_copy(auth_level, -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(hosts, NULL)) {
	sk_OPENSSL_STRING_pop_free(dest->hosts, str_free);
	dest->hosts = NULL;
	if (src->hosts) {
	dest->hosts =
	sk_OPENSSL_STRING_deep_copy(src->hosts, str_copy, str_free);
	if (dest->hosts == NULL)
	return 0;
	dest->hostflags = src->hostflags;
	}
	}

	if (test_x509_verify_param_copy(email, NULL)) {
	if (!X509_VERIFY_PARAM_set1_email(dest, src->email, src->emaillen))
	return 0;
	}

	if (test_x509_verify_param_copy(ip, NULL)) {
	if (!X509_VERIFY_PARAM_set1_ip(dest, src->ip, src->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)
	{
	void *tmp;
	if (src) {
	if (srclen == 0)
	srclen = strlen(src);

	tmp = OPENSSL_memdup(src, srclen);
	if (tmp == NULL)
	return 0;
	} else {
	tmp = NULL;
	srclen = 0;
	}
	OPENSSL_free(*pdest);
	*pdest = tmp;
	if (pdestlen != NULL)
	*pdestlen = srclen;
	return 1;
	}

	int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM param, const char name)
	{
	OPENSSL_free(param->name);
	param->name = OPENSSL_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(const X509_VERIFY_PARAM *param)
	{
	return param->flags;
	}

	uint32_t X509_VERIFY_PARAM_get_inh_flags(const X509_VERIFY_PARAM *param)
	{
	return param->inh_flags;
	}

	int X509_VERIFY_PARAM_set_inh_flags(X509_VERIFY_PARAM *param, uint32_t flags)
	{
	param->inh_flags = flags;
	return 1;
	}

	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_auth_level(X509_VERIFY_PARAM *param, int auth_level)
	{
	param->auth_level = auth_level;
	}

	time_t X509_VERIFY_PARAM_get_time(const X509_VERIFY_PARAM *param)
	{
	return param->check_time;
	}

	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 == NULL) {
	param->policies = sk_ASN1_OBJECT_new_null();
	if (param->policies == NULL)
	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 == NULL)
	return 0;
	sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);

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

	param->policies = sk_ASN1_OBJECT_new_null();
	if (param->policies == NULL)
	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, 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, ADD_HOST, name, namelen);
	}

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

	unsigned int X509_VERIFY_PARAM_get_hostflags(const X509_VERIFY_PARAM *param)
	{
	return param->hostflags;
	}

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

	/*
	* Move peername from one param structure to another, freeing any name present
	* at the target. If the source is a NULL parameter structure, free and zero
	* the target peername.
	*/
	void X509_VERIFY_PARAM_move_peername(X509_VERIFY_PARAM *to,
	X509_VERIFY_PARAM *from)
	{
	char *peername = (from != NULL) ? from->peername : NULL;

	if (to->peername != peername) {
	OPENSSL_free(to->peername);
	to->peername = peername;
	}
	if (from)
	from->peername = NULL;
	}

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

	int X509_VERIFY_PARAM_get_auth_level(const X509_VERIFY_PARAM *param)
	{
	return param->auth_level;
	}

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

	#define vpm_empty_id NULL, 0U, NULL, NULL, 0, NULL, 0

	/*
	* 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[] = {
	{
	"default", /* X509 default parameters */
	0, /* Check time */
	0, /* internal flags */
	X509_V_FLAG_TRUSTED_FIRST, /* flags */
	0, /* purpose */
	0, /* trust */
	100, /* depth */
	-1, /* auth_level */
	NULL, /* policies */
	vpm_empty_id},
	{
	"pkcs7", /* S/MIME sign parameters */
	0, /* Check time */
	0, /* internal flags */
	0, /* flags */
	X509_PURPOSE_SMIME_SIGN, /* purpose */
	X509_TRUST_EMAIL, /* trust */
	-1, /* depth */
	-1, /* auth_level */
	NULL, /* policies */
	vpm_empty_id},
	{
	"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 */
	-1, /* auth_level */
	NULL, /* policies */
	vpm_empty_id},
	{
	"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 */
	-1, /* auth_level */
	NULL, /* policies */
	vpm_empty_id},
	{
	"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 */
	-1, /* auth_level */
	NULL, /* policies */
	vpm_empty_id}
	};

	static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;

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

	DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
	IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);

	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)
	{
	int idx;
	X509_VERIFY_PARAM *ptmp;
	if (param_table == NULL) {
	param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
	if (param_table == NULL)
	return 0;
	} else {
	idx = sk_X509_VERIFY_PARAM_find(param_table, param);
	if (idx >= 0) {
	ptmp = sk_X509_VERIFY_PARAM_delete(param_table, idx);
	X509_VERIFY_PARAM_free(ptmp);
	}
	}
	if (!sk_X509_VERIFY_PARAM_push(param_table, param))
	return 0;
	return 1;
	}

	int X509_VERIFY_PARAM_get_count(void)
	{
	int num = OSSL_NELEM(default_table);
	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 = OSSL_NELEM(default_table);
	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)
	{
	int idx;
	X509_VERIFY_PARAM pm;

	pm.name = (char *)name;
	if (param_table != NULL) {
	idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
	if (idx >= 0)
	return sk_X509_VERIFY_PARAM_value(param_table, idx);
	}
	return OBJ_bsearch_table(&pm, default_table, OSSL_NELEM(default_table));
	}

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