Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* ==================================================================== |
| 2 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in |
| 13 | * the documentation and/or other materials provided with the |
| 14 | * distribution. |
| 15 | * |
| 16 | * 3. All advertising materials mentioning features or use of this |
| 17 | * software must display the following acknowledgment: |
| 18 | * "This product includes software developed by the OpenSSL Project |
| 19 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 20 | * |
| 21 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 22 | * endorse or promote products derived from this software without |
| 23 | * prior written permission. For written permission, please contact |
| 24 | * licensing@OpenSSL.org. |
| 25 | * |
| 26 | * 5. Products derived from this software may not be called "OpenSSL" |
| 27 | * nor may "OpenSSL" appear in their names without prior written |
| 28 | * permission of the OpenSSL Project. |
| 29 | * |
| 30 | * 6. Redistributions of any form whatsoever must retain the following |
| 31 | * acknowledgment: |
| 32 | * "This product includes software developed by the OpenSSL Project |
| 33 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 34 | * |
| 35 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 36 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 37 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 38 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 39 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 40 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 41 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 42 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 43 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 44 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 45 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 46 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 47 | * ==================================================================== |
| 48 | * |
| 49 | * This product includes cryptographic software written by Eric Young |
| 50 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 51 | * Hudson (tjh@cryptsoft.com). |
| 52 | * |
| 53 | */ |
| 54 | |
| 55 | #include "eng_int.h" |
| 56 | |
| 57 | /* If this symbol is defined then ENGINE_get_cipher_engine(), the function that |
| 58 | * is used by EVP to hook in cipher code and cache defaults (etc), will display |
| 59 | * brief debugging summaries to stderr with the 'nid'. */ |
| 60 | /* #define ENGINE_CIPHER_DEBUG */ |
| 61 | |
| 62 | static ENGINE_TABLE *cipher_table = NULL; |
| 63 | |
| 64 | void ENGINE_unregister_ciphers(ENGINE *e) |
| 65 | { |
| 66 | engine_table_unregister(&cipher_table, e); |
| 67 | } |
| 68 | |
| 69 | static void engine_unregister_all_ciphers(void) |
| 70 | { |
| 71 | engine_table_cleanup(&cipher_table); |
| 72 | } |
| 73 | |
| 74 | int ENGINE_register_ciphers(ENGINE *e) |
| 75 | { |
| 76 | if(e->ciphers) |
| 77 | { |
| 78 | const int *nids; |
| 79 | int num_nids = e->ciphers(e, NULL, &nids, 0); |
| 80 | if(num_nids > 0) |
| 81 | return engine_table_register(&cipher_table, |
| 82 | engine_unregister_all_ciphers, e, nids, |
| 83 | num_nids, 0); |
| 84 | } |
| 85 | return 1; |
| 86 | } |
| 87 | |
| 88 | void ENGINE_register_all_ciphers() |
| 89 | { |
| 90 | ENGINE *e; |
| 91 | |
| 92 | for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e)) |
| 93 | ENGINE_register_ciphers(e); |
| 94 | } |
| 95 | |
| 96 | int ENGINE_set_default_ciphers(ENGINE *e) |
| 97 | { |
| 98 | if(e->ciphers) |
| 99 | { |
| 100 | const int *nids; |
| 101 | int num_nids = e->ciphers(e, NULL, &nids, 0); |
| 102 | if(num_nids > 0) |
| 103 | return engine_table_register(&cipher_table, |
| 104 | engine_unregister_all_ciphers, e, nids, |
| 105 | num_nids, 1); |
| 106 | } |
| 107 | return 1; |
| 108 | } |
| 109 | |
| 110 | /* Exposed API function to get a functional reference from the implementation |
| 111 | * table (ie. try to get a functional reference from the tabled structural |
| 112 | * references) for a given cipher 'nid' */ |
| 113 | ENGINE *ENGINE_get_cipher_engine(int nid) |
| 114 | { |
| 115 | return engine_table_select(&cipher_table, nid); |
| 116 | } |
| 117 | |
| 118 | /* Obtains a cipher implementation from an ENGINE functional reference */ |
| 119 | const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid) |
| 120 | { |
| 121 | const EVP_CIPHER *ret; |
| 122 | ENGINE_CIPHERS_PTR fn = ENGINE_get_ciphers(e); |
| 123 | if(!fn || !fn(e, &ret, NULL, nid)) |
| 124 | { |
| 125 | ENGINEerr(ENGINE_F_ENGINE_GET_CIPHER, |
| 126 | ENGINE_R_UNIMPLEMENTED_CIPHER); |
| 127 | return NULL; |
| 128 | } |
| 129 | return ret; |
| 130 | } |
| 131 | |
| 132 | /* Gets the cipher callback from an ENGINE structure */ |
| 133 | ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e) |
| 134 | { |
| 135 | return e->ciphers; |
| 136 | } |
| 137 | |
| 138 | /* Sets the cipher callback in an ENGINE structure */ |
| 139 | int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f) |
| 140 | { |
| 141 | e->ciphers = f; |
| 142 | return 1; |
| 143 | } |