v3_lib.c
上传用户:yisoukefu
上传日期:2020-08-09
资源大小:39506k
文件大小:9k
- /* v3_lib.c */
- /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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
- * 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).
- *
- */
- /* 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)