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