yuzu/externals/libressl/crypto/x509/x509_vpm.c

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2020-12-28 19:15:37 +04:00
/* $OpenBSD: x509_vpm.c,v 1.22 2020/09/14 08:10:04 beck 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);
size_t i;
if (ret == NULL)
return NULL;
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
x509_param_set_hosts_internal(X509_VERIFY_PARAM_ID *id, int mode,
const char *name, size_t namelen)
{
char *copy;
if (name != NULL && namelen == 0)
namelen = strlen(name);
/*
* Refuse names with embedded NUL bytes.
*/
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;
paramid->poisoned = 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
x509_param_set1_internal(char **pdest, size_t *pdestlen, const char *src,
size_t srclen, int nonul)
{
char *tmp;
if (src == NULL)
return 0;
if (srclen == 0) {
srclen = strlen(src);
if (srclen == 0)
return 0;
if ((tmp = strdup(src)) == NULL)
return 0;
} else {
if (nonul && memchr(src, '\0', srclen))
return 0;
if ((tmp = malloc(srclen)) == NULL)
return 0;
memcpy(tmp, src, srclen);
}
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)
{
if (x509_param_set_hosts_internal(param->id, SET_HOST, name, namelen))
return 1;
param->id->poisoned = 1;
return 0;
}
int
X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
const char *name, size_t namelen)
{
if (x509_param_set_hosts_internal(param->id, ADD_HOST, name, namelen))
return 1;
param->id->poisoned = 1;
return 0;
}
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)
{
if (x509_param_set1_internal(&param->id->email, &param->id->emaillen,
email, emaillen, 1))
return 1;
param->id->poisoned = 1;
return 0;
}
int
X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param, const unsigned char *ip,
size_t iplen)
{
if (iplen != 4 && iplen != 16)
goto err;
if (x509_param_set1_internal((char **)&param->id->ip, &param->id->iplen,
(char *)ip, iplen, 0))
return 1;
err:
param->id->poisoned = 1;
return 0;
}
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);
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;
}