ref: 7be7d0681f567e97fd37f937c2e5e486d6d74eab
dir: /sys/src/ape/lib/openssl/crypto/x509v3/v3_lib.c/
/* v3_lib.c */
/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 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
* [email protected].
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
/* X509 v3 extension utilities */
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#include "ext_dat.h"
static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL;
static int ext_cmp(const X509V3_EXT_METHOD * const *a,
const X509V3_EXT_METHOD * const *b);
static void ext_list_free(X509V3_EXT_METHOD *ext);
int X509V3_EXT_add(X509V3_EXT_METHOD *ext)
{
if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) {
X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);
return 0;
}
if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {
X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);
return 0;
}
return 1;
}
static int ext_cmp(const X509V3_EXT_METHOD * const *a,
const X509V3_EXT_METHOD * const *b)
{
return ((*a)->ext_nid - (*b)->ext_nid);
}
X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
{
X509V3_EXT_METHOD tmp, *t = &tmp, **ret;
int idx;
if(nid < 0) return NULL;
tmp.ext_nid = nid;
ret = (X509V3_EXT_METHOD **) OBJ_bsearch((char *)&t,
(char *)standard_exts, STANDARD_EXTENSION_COUNT,
sizeof(X509V3_EXT_METHOD *), (int (*)(const void *, const void *))ext_cmp);
if(ret) return *ret;
if(!ext_list) return NULL;
idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);
if(idx == -1) return NULL;
return sk_X509V3_EXT_METHOD_value(ext_list, idx);
}
X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)
{
int nid;
if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL;
return X509V3_EXT_get_nid(nid);
}
int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
{
for(;extlist->ext_nid!=-1;extlist++)
if(!X509V3_EXT_add(extlist)) return 0;
return 1;
}
int X509V3_EXT_add_alias(int nid_to, int nid_from)
{
X509V3_EXT_METHOD *ext, *tmpext;
if(!(ext = X509V3_EXT_get_nid(nid_from))) {
X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND);
return 0;
}
if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {
X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE);
return 0;
}
*tmpext = *ext;
tmpext->ext_nid = nid_to;
tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
return X509V3_EXT_add(tmpext);
}
void X509V3_EXT_cleanup(void)
{
sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
ext_list = NULL;
}
static void ext_list_free(X509V3_EXT_METHOD *ext)
{
if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext);
}
/* Legacy function: we don't need to add standard extensions
* any more because they are now kept in ext_dat.h.
*/
int X509V3_add_standard_extensions(void)
{
return 1;
}
/* Return an extension internal structure */
void *X509V3_EXT_d2i(X509_EXTENSION *ext)
{
X509V3_EXT_METHOD *method;
const unsigned char *p;
if(!(method = X509V3_EXT_get(ext))) return NULL;
p = ext->value->data;
if(method->it) return ASN1_item_d2i(NULL, &p, ext->value->length, ASN1_ITEM_ptr(method->it));
return method->d2i(NULL, &p, ext->value->length);
}
/* Get critical flag and decoded version of extension from a NID.
* The "idx" variable returns the last found extension and can
* be used to retrieve multiple extensions of the same NID.
* However multiple extensions with the same NID is usually
* due to a badly encoded certificate so if idx is NULL we
* choke if multiple extensions exist.
* The "crit" variable is set to the critical value.
* The return value is the decoded extension or NULL on
* error. The actual error can have several different causes,
* the value of *crit reflects the cause:
* >= 0, extension found but not decoded (reflects critical value).
* -1 extension not found.
* -2 extension occurs more than once.
*/
void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx)
{
int lastpos, i;
X509_EXTENSION *ex, *found_ex = NULL;
if(!x) {
if(idx) *idx = -1;
if(crit) *crit = -1;
return NULL;
}
if(idx) lastpos = *idx + 1;
else lastpos = 0;
if(lastpos < 0) lastpos = 0;
for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++)
{
ex = sk_X509_EXTENSION_value(x, i);
if(OBJ_obj2nid(ex->object) == nid) {
if(idx) {
*idx = i;
found_ex = ex;
break;
} else if(found_ex) {
/* Found more than one */
if(crit) *crit = -2;
return NULL;
}
found_ex = ex;
}
}
if(found_ex) {
/* Found it */
if(crit) *crit = X509_EXTENSION_get_critical(found_ex);
return X509V3_EXT_d2i(found_ex);
}
/* Extension not found */
if(idx) *idx = -1;
if(crit) *crit = -1;
return NULL;
}
/* This function is a general extension append, replace and delete utility.
* The precise operation is governed by the 'flags' value. The 'crit' and
* 'value' arguments (if relevant) are the extensions internal structure.
*/
int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
int crit, unsigned long flags)
{
int extidx = -1;
int errcode;
X509_EXTENSION *ext, *extmp;
unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
/* If appending we don't care if it exists, otherwise
* look for existing extension.
*/
if(ext_op != X509V3_ADD_APPEND)
extidx = X509v3_get_ext_by_NID(*x, nid, -1);
/* See if extension exists */
if(extidx >= 0) {
/* If keep existing, nothing to do */
if(ext_op == X509V3_ADD_KEEP_EXISTING)
return 1;
/* If default then its an error */
if(ext_op == X509V3_ADD_DEFAULT) {
errcode = X509V3_R_EXTENSION_EXISTS;
goto err;
}
/* If delete, just delete it */
if(ext_op == X509V3_ADD_DELETE) {
if(!sk_X509_EXTENSION_delete(*x, extidx)) return -1;
return 1;
}
} else {
/* If replace existing or delete, error since
* extension must exist
*/
if((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
(ext_op == X509V3_ADD_DELETE)) {
errcode = X509V3_R_EXTENSION_NOT_FOUND;
goto err;
}
}
/* If we get this far then we have to create an extension:
* could have some flags for alternative encoding schemes...
*/
ext = X509V3_EXT_i2d(nid, crit, value);
if(!ext) {
X509V3err(X509V3_F_X509V3_ADD1_I2D, X509V3_R_ERROR_CREATING_EXTENSION);
return 0;
}
/* If extension exists replace it.. */
if(extidx >= 0) {
extmp = sk_X509_EXTENSION_value(*x, extidx);
X509_EXTENSION_free(extmp);
if(!sk_X509_EXTENSION_set(*x, extidx, ext)) return -1;
return 1;
}
if(!*x && !(*x = sk_X509_EXTENSION_new_null())) return -1;
if(!sk_X509_EXTENSION_push(*x, ext)) return -1;
return 1;
err:
if(!(flags & X509V3_ADD_SILENT))
X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);
return 0;
}
IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)