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 /* 58 * If this symbol is defined then ENGINE_get_default_DSA(), the function that 59 * is used by DSA to hook in implementation code and cache defaults (etc), 60 * will display brief debugging summaries to stderr with the 'nid'. 61 */ 62 /* #define ENGINE_DSA_DEBUG */ 63 64 static ENGINE_TABLE *dsa_table = NULL; 65 static const int dummy_nid = 1; 66 67 void ENGINE_unregister_DSA(ENGINE *e) 68 { 69 engine_table_unregister(&dsa_table, e); 70 } 71 72 static void engine_unregister_all_DSA(void) 73 { 74 engine_table_cleanup(&dsa_table); 75 } 76 77 int ENGINE_register_DSA(ENGINE *e) 78 { 79 if (e->dsa_meth) 80 return engine_table_register(&dsa_table, 81 engine_unregister_all_DSA, e, &dummy_nid, 82 1, 0); 83 return 1; 84 } 85 86 void ENGINE_register_all_DSA() 87 { 88 ENGINE *e; 89 90 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) 91 ENGINE_register_DSA(e); 92 } 93 94 int ENGINE_set_default_DSA(ENGINE *e) 95 { 96 if (e->dsa_meth) 97 return engine_table_register(&dsa_table, 98 engine_unregister_all_DSA, e, &dummy_nid, 99 1, 1); 100 return 1; 101 } 102 103 /* 104 * Exposed API function to get a functional reference from the implementation 105 * table (ie. try to get a functional reference from the tabled structural 106 * references). 107 */ 108 ENGINE *ENGINE_get_default_DSA(void) 109 { 110 return engine_table_select(&dsa_table, dummy_nid); 111 } 112 113 /* Obtains an DSA implementation from an ENGINE functional reference */ 114 const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e) 115 { 116 return e->dsa_meth; 117 } 118 119 /* Sets an DSA implementation in an ENGINE structure */ 120 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth) 121 { 122 e->dsa_meth = dsa_meth; 123 return 1; 124 } 125