- /*
- * 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/buf.h>
- #include <openssl/mem.h>
- #include <openssl/obj.h>
- #include <openssl/stack.h>
- #include <openssl/x509.h>
- #include <openssl/x509v3.h>
-
- #include "vpm_int.h"
- #include "../internal.h"
-
-
- /* X509_VERIFY_PARAM functions */
-
- #define SET_HOST 0
- #define ADD_HOST 1
-
- static char *str_copy(char *s)
- {
- return OPENSSL_strdup(s);
- }
-
- 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_ID *id, 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 && id->hosts) {
- string_stack_free(id->hosts);
- id->hosts = NULL;
- }
-
- copy = BUF_strndup(name, namelen);
- if (copy == NULL)
- return 0;
-
- if (id->hosts == NULL &&
- (id->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
- OPENSSL_free(copy);
- return 0;
- }
-
- if (!sk_OPENSSL_STRING_push(id->hosts, copy)) {
- OPENSSL_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;
- }
- if (paramid->peername) {
- OPENSSL_free(paramid->peername);
- paramid->peername = NULL;
- }
- 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;
- }
- paramid->poison = 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;
- }
- OPENSSL_memset(param, 0, sizeof(X509_VERIFY_PARAM));
- OPENSSL_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)
- {
- if (param == NULL)
- return;
- 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;
- }
-
- /* 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_OPENSSL_STRING_deep_copy(id->hosts, str_copy, 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;
- }
-
- dest->id->poison = src->id->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 = BUF_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 = 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(¶m->purpose, purpose);
- }
-
- int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
- {
- return X509_TRUST_set(¶m->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 char *name, size_t namelen)
- {
- if (!int_x509_param_set_hosts(param->id, SET_HOST, name, namelen)) {
- param->id->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->id, ADD_HOST, name, namelen)) {
- param->id->poison = 1;
- return 0;
- }
- return 1;
- }
-
- 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 (OPENSSL_memchr(email, '\0', emaillen) != NULL ||
- !int_x509_param_set1(¶m->id->email, ¶m->id->emaillen,
- email, emaillen)) {
- param->id->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 **)¶m->id->ip, ¶m->id->iplen,
- (char *)ip, iplen)) {
- param->id->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)a2i_ipadd(ipout, ipasc);
- if (iplen == 0)
- return 0;
- return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
- }
-
- int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
- {
- return param->depth;
- }
-
- const char *X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
- {
- return param->name;
- }
-
- static const X509_VERIFY_PARAM_ID _empty_id =
- { NULL, 0U, NULL, NULL, 0, NULL, 0, 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;
-
- sk_X509_VERIFY_PARAM_sort(param_table);
- 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;
- sk_X509_VERIFY_PARAM_sort(param_table);
- 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;
- }
|