| /* v3_lib.c */ |
| /* Written by Dr Stephen N Henson (steve@openssl.org) 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 <openssl/conf.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| #include <openssl/x509v3.h> |
| |
| #include "ext_dat.h" |
| static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL; |
| |
| static void ext_list_free(X509V3_EXT_METHOD *ext); |
| |
| static int ext_stack_cmp(const X509V3_EXT_METHOD **a, const X509V3_EXT_METHOD **b) |
| { |
| return ((*a)->ext_nid - (*b)->ext_nid); |
| } |
| |
| int X509V3_EXT_add(X509V3_EXT_METHOD *ext) |
| { |
| if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_stack_cmp))) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int ext_cmp(const void *void_a, |
| const void *void_b) |
| { |
| const X509V3_EXT_METHOD **a = (const X509V3_EXT_METHOD**) void_a; |
| const X509V3_EXT_METHOD **b = (const X509V3_EXT_METHOD**) void_b; |
| return ext_stack_cmp(a, b); |
| } |
| |
| const X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid) |
| { |
| X509V3_EXT_METHOD tmp; |
| const X509V3_EXT_METHOD *t = &tmp, * const *ret; |
| size_t idx; |
| |
| if(nid < 0) return NULL; |
| tmp.ext_nid = nid; |
| ret = bsearch(&t, standard_exts, STANDARD_EXTENSION_COUNT, sizeof(X509V3_EXT_METHOD*), ext_cmp); |
| if(ret) return *ret; |
| if(!ext_list) return NULL; |
| |
| if (!sk_X509V3_EXT_METHOD_find(ext_list, &idx, &tmp)) |
| return NULL; |
| return sk_X509V3_EXT_METHOD_value(ext_list, idx); |
| } |
| |
| const 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_free(int nid, void *ext_data) |
| { |
| const X509V3_EXT_METHOD *ext_method = X509V3_EXT_get_nid(nid); |
| if (ext_method == NULL) |
| { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_free, X509V3_R_CANNOT_FIND_FREE_FUNCTION); |
| return 0; |
| } |
| |
| if (ext_method->it != NULL) |
| ASN1_item_free(ext_data, ASN1_ITEM_ptr(ext_method->it)); |
| else if (ext_method->ext_free != NULL) |
| ext_method->ext_free(ext_data); |
| else |
| { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_free, X509V3_R_CANNOT_FIND_FREE_FUNCTION); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| 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) |
| { |
| const X509V3_EXT_METHOD *ext; |
| X509V3_EXT_METHOD *tmpext; |
| |
| if(!(ext = X509V3_EXT_get_nid(nid_from))) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_EXT_add_alias, X509V3_R_EXTENSION_NOT_FOUND); |
| return 0; |
| } |
| if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) { |
| OPENSSL_PUT_ERROR(X509V3, 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) |
| { |
| const 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; |
| size_t 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) { |
| OPENSSL_PUT_ERROR(X509V3, 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)) |
| OPENSSL_PUT_ERROR(X509V3, X509V3_add1_i2d, errcode); |
| return 0; |
| } |