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/*
* 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 <string.h>
#include <openssl/mem.h>
#include <openssl/obj.h>
#include <openssl/stack.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "../internal.h"
#include "../x509v3/internal.h"
#include "internal.h"
// X509_VERIFY_PARAM functions
#define SET_HOST 0
#define ADD_HOST 1
static void str_free(char *s) { OPENSSL_free(s); }
#define string_stack_free(sk) sk_OPENSSL_STRING_pop_free(sk, str_free)
static int int_x509_param_set_hosts(X509_VERIFY_PARAM *param, int mode,
const char *name, size_t namelen) {
char *copy;
if (name == NULL || namelen == 0) {
// Unlike OpenSSL, we reject trying to set or add an empty name.
return 0;
}
// Refuse names with embedded NUL bytes.
// XXX: Do we need to push an error onto the error stack?
if (name && OPENSSL_memchr(name, '\0', namelen)) {
return 0;
}
if (mode == SET_HOST && param->hosts) {
string_stack_free(param->hosts);
param->hosts = NULL;
}
copy = OPENSSL_strndup(name, namelen);
if (copy == NULL) {
return 0;
}
if (param->hosts == NULL &&
(param->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
OPENSSL_free(copy);
return 0;
}
if (!sk_OPENSSL_STRING_push(param->hosts, copy)) {
OPENSSL_free(copy);
if (sk_OPENSSL_STRING_num(param->hosts) == 0) {
sk_OPENSSL_STRING_free(param->hosts);
param->hosts = NULL;
}
return 0;
}
return 1;
}
static void x509_verify_param_zero(X509_VERIFY_PARAM *param) {
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;
}
if (param->hosts) {
string_stack_free(param->hosts);
param->hosts = NULL;
}
if (param->peername) {
OPENSSL_free(param->peername);
param->peername = NULL;
}
if (param->email) {
OPENSSL_free(param->email);
param->email = NULL;
param->emaillen = 0;
}
if (param->ip) {
OPENSSL_free(param->ip);
param->ip = NULL;
param->iplen = 0;
}
param->poison = 0;
}
X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) {
X509_VERIFY_PARAM *param;
param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
if (!param) {
return NULL;
}
OPENSSL_memset(param, 0, sizeof(X509_VERIFY_PARAM));
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);
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, 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(hosts, NULL)) {
if (dest->hosts) {
string_stack_free(dest->hosts);
dest->hosts = NULL;
}
if (src->hosts) {
dest->hosts =
sk_OPENSSL_STRING_deep_copy(src->hosts, OPENSSL_strdup, 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;
}
}
dest->poison = src->poison;
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 == NULL || srclen == 0) {
// Unlike OpenSSL, we do not allow an empty string to disable previously
// configured checks.
return 0;
}
tmp = OPENSSL_memdup(src, srclen);
if (!tmp) {
return 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 = 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;
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_posix(X509_VERIFY_PARAM *param, int64_t t) {
param->check_time = t;
param->flags |= X509_V_FLAG_USE_CHECK_TIME;
}
void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) {
X509_VERIFY_PARAM_set_time_posix(param, t);
}
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,
const STACK_OF(ASN1_OBJECT) *policies) {
if (!param) {
return 0;
}
sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
if (!policies) {
param->policies = NULL;
return 1;
}
param->policies =
sk_ASN1_OBJECT_deep_copy(policies, OBJ_dup, ASN1_OBJECT_free);
if (!param->policies) {
return 0;
}
return 1;
}
int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param, const char *name,
size_t namelen) {
if (!int_x509_param_set_hosts(param, SET_HOST, name, namelen)) {
param->poison = 1;
return 0;
}
return 1;
}
int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param, const char *name,
size_t namelen) {
if (!int_x509_param_set_hosts(param, ADD_HOST, name, namelen)) {
param->poison = 1;
return 0;
}
return 1;
}
void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
unsigned int flags) {
param->hostflags = flags;
}
char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param) {
return param->peername;
}
int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param, const char *email,
size_t emaillen) {
if (OPENSSL_memchr(email, '\0', emaillen) != NULL ||
!int_x509_param_set1(&param->email, &param->emaillen, email, emaillen)) {
param->poison = 1;
return 0;
}
return 1;
}
int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param, const unsigned char *ip,
size_t iplen) {
if ((iplen != 4 && iplen != 16) ||
!int_x509_param_set1((char **)&param->ip, &param->iplen, (char *)ip,
iplen)) {
param->poison = 1;
return 0;
}
return 1;
}
int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc) {
unsigned char ipout[16];
size_t iplen;
iplen = (size_t)x509v3_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;
}
#define vpm_empty_id NULL, 0U, NULL, NULL, 0, NULL, 0, 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[] = {
{(char *)"default", // X509 default parameters
0, // Check time
0, // internal flags
X509_V_FLAG_TRUSTED_FIRST, // 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}};
const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) {
for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(default_table); i++) {
if (strcmp(default_table[i].name, name) == 0) {
return &default_table[i];
}
}
return NULL;
}