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 <openssl/evp.h> 56#include <openssl/engine.h> 57#include "eng_int.h" 58 59/* If this symbol is defined then ENGINE_get_cipher_engine(), the function that 60 * is used by EVP to hook in cipher code and cache defaults (etc), will display 61 * brief debugging summaries to stderr with the 'nid'. */ 62/* #define ENGINE_CIPHER_DEBUG */ 63 64static ENGINE_TABLE *cipher_table = NULL; 65 66void ENGINE_unregister_ciphers(ENGINE *e) 67 { 68 engine_table_unregister(&cipher_table, e); 69 } 70 71static void engine_unregister_all_ciphers(void) 72 { 73 engine_table_cleanup(&cipher_table); 74 } 75 76int ENGINE_register_ciphers(ENGINE *e) 77 { 78 if(e->ciphers) 79 { 80 const int *nids; 81 int num_nids = e->ciphers(e, NULL, &nids, 0); 82 if(num_nids > 0) 83 return engine_table_register(&cipher_table, 84 engine_unregister_all_ciphers, e, nids, 85 num_nids, 0); 86 } 87 return 1; 88 } 89 90void ENGINE_register_all_ciphers() 91 { 92 ENGINE *e; 93 94 for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e)) 95 ENGINE_register_ciphers(e); 96 } 97 98int ENGINE_set_default_ciphers(ENGINE *e) 99 { 100 if(e->ciphers) 101 { 102 const int *nids; 103 int num_nids = e->ciphers(e, NULL, &nids, 0); 104 if(num_nids > 0) 105 return engine_table_register(&cipher_table, 106 engine_unregister_all_ciphers, e, nids, 107 num_nids, 1); 108 } 109 return 1; 110 } 111 112/* Exposed API function to get a functional reference from the implementation 113 * table (ie. try to get a functional reference from the tabled structural 114 * references) for a given cipher 'nid' */ 115ENGINE *ENGINE_get_cipher_engine(int nid) 116 { 117 return engine_table_select(&cipher_table, nid); 118 } 119 120/* Obtains a cipher implementation from an ENGINE functional reference */ 121const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid) 122 { 123 const EVP_CIPHER *ret; 124 ENGINE_CIPHERS_PTR fn = ENGINE_get_ciphers(e); 125 if(!fn || !fn(e, &ret, NULL, nid)) 126 { 127 ENGINEerr(ENGINE_F_ENGINE_GET_CIPHER, 128 ENGINE_R_UNIMPLEMENTED_CIPHER); 129 return NULL; 130 } 131 return ret; 132 } 133 134/* Gets the cipher callback from an ENGINE structure */ 135ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e) 136 { 137 return e->ciphers; 138 } 139 140/* Sets the cipher callback in an ENGINE structure */ 141int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f) 142 { 143 e->ciphers = f; 144 return 1; 145 } 146