| /* |
| * 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 <assert.h> |
| #include <stdio.h> |
| |
| #include <openssl/conf.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| #include <openssl/x509v3.h> |
| |
| #include "../x509/internal.h" |
| |
| #include "ext_dat.h" |
| static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL; |
| |
| static int ext_stack_cmp(const X509V3_EXT_METHOD *const *a, |
| const X509V3_EXT_METHOD *const *b) { |
| return ((*a)->ext_nid - (*b)->ext_nid); |
| } |
| |
| int X509V3_EXT_add(X509V3_EXT_METHOD *ext) { |
| // We only support |ASN1_ITEM|-based extensions. |
| assert(ext->it != NULL); |
| |
| // TODO(davidben): This should be locked. Also check for duplicates. |
| if (!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_stack_cmp))) { |
| return 0; |
| } |
| if (!sk_X509V3_EXT_METHOD_push(ext_list, ext)) { |
| return 0; |
| } |
| sk_X509V3_EXT_METHOD_sort(ext_list); |
| 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(const 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_R_CANNOT_FIND_FREE_FUNCTION); |
| return 0; |
| } |
| |
| ASN1_item_free(ext_data, ASN1_ITEM_ptr(ext_method->it)); |
| return 1; |
| } |
| |
| int X509V3_EXT_add_alias(int nid_to, int nid_from) { |
| OPENSSL_BEGIN_ALLOW_DEPRECATED |
| const X509V3_EXT_METHOD *ext; |
| X509V3_EXT_METHOD *tmpext; |
| |
| if (!(ext = X509V3_EXT_get_nid(nid_from))) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_R_EXTENSION_NOT_FOUND); |
| return 0; |
| } |
| if (!(tmpext = |
| (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) { |
| return 0; |
| } |
| *tmpext = *ext; |
| tmpext->ext_nid = nid_to; |
| if (!X509V3_EXT_add(tmpext)) { |
| OPENSSL_free(tmpext); |
| return 0; |
| } |
| return 1; |
| OPENSSL_END_ALLOW_DEPRECATED |
| } |
| |
| // 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(const X509_EXTENSION *ext) { |
| const X509V3_EXT_METHOD *method; |
| const unsigned char *p; |
| |
| if (!(method = X509V3_EXT_get(ext))) { |
| return NULL; |
| } |
| p = ext->value->data; |
| void *ret = |
| ASN1_item_d2i(NULL, &p, ext->value->length, ASN1_ITEM_ptr(method->it)); |
| if (ret == NULL) { |
| return NULL; |
| } |
| // Check for trailing data. |
| if (p != ext->value->data + ext->value->length) { |
| ASN1_item_free(ret, ASN1_ITEM_ptr(method->it)); |
| OPENSSL_PUT_ERROR(X509V3, X509V3_R_TRAILING_DATA_IN_EXTENSION); |
| return NULL; |
| } |
| return ret; |
| } |
| |
| void *X509V3_get_d2i(const STACK_OF(X509_EXTENSION) *extensions, int nid, |
| int *out_critical, int *out_idx) { |
| int lastpos; |
| size_t i; |
| X509_EXTENSION *ex, *found_ex = NULL; |
| if (!extensions) { |
| if (out_idx) { |
| *out_idx = -1; |
| } |
| if (out_critical) { |
| *out_critical = -1; |
| } |
| return NULL; |
| } |
| if (out_idx) { |
| lastpos = *out_idx + 1; |
| } else { |
| lastpos = 0; |
| } |
| if (lastpos < 0) { |
| lastpos = 0; |
| } |
| for (i = lastpos; i < sk_X509_EXTENSION_num(extensions); i++) { |
| ex = sk_X509_EXTENSION_value(extensions, i); |
| if (OBJ_obj2nid(ex->object) == nid) { |
| if (out_idx) { |
| // TODO(https://crbug.com/boringssl/379): Consistently reject |
| // duplicate extensions. |
| *out_idx = i; |
| found_ex = ex; |
| break; |
| } else if (found_ex) { |
| // Found more than one |
| if (out_critical) { |
| *out_critical = -2; |
| } |
| return NULL; |
| } |
| found_ex = ex; |
| } |
| } |
| if (found_ex) { |
| // Found it |
| if (out_critical) { |
| *out_critical = X509_EXTENSION_get_critical(found_ex); |
| } |
| return X509V3_EXT_d2i(found_ex); |
| } |
| |
| // Extension not found |
| if (out_idx) { |
| *out_idx = -1; |
| } |
| if (out_critical) { |
| *out_critical = -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 errcode, extidx = -1; |
| X509_EXTENSION *ext = NULL, *extmp; |
| STACK_OF(X509_EXTENSION) *ret = NULL; |
| 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) { |
| X509_EXTENSION *prev_ext = sk_X509_EXTENSION_delete(*x, extidx); |
| if (prev_ext == NULL) { |
| return -1; |
| } |
| X509_EXTENSION_free(prev_ext); |
| 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_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 ((ret = *x) == NULL && (ret = sk_X509_EXTENSION_new_null()) == NULL) { |
| goto m_fail; |
| } |
| if (!sk_X509_EXTENSION_push(ret, ext)) { |
| goto m_fail; |
| } |
| |
| *x = ret; |
| return 1; |
| |
| m_fail: |
| if (ret != *x) { |
| sk_X509_EXTENSION_free(ret); |
| } |
| X509_EXTENSION_free(ext); |
| return -1; |
| |
| err: |
| if (!(flags & X509V3_ADD_SILENT)) { |
| OPENSSL_PUT_ERROR(X509V3, errcode); |
| } |
| return 0; |
| } |