| 1 |  |  | /* $OpenBSD: tb_dh.c,v 1.6 2014/06/12 15:49:29 deraadt Exp $ */ | 
    
    | 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_DH(), the function that is | 
    
    | 59 |  |  |  * used by DH to hook in implementation code and cache defaults (etc), will | 
    
    | 60 |  |  |  * display brief debugging summaries to stderr with the 'nid'. */ | 
    
    | 61 |  |  | /* #define ENGINE_DH_DEBUG */ | 
    
    | 62 |  |  |  | 
    
    | 63 |  |  | static ENGINE_TABLE *dh_table = NULL; | 
    
    | 64 |  |  | static const int dummy_nid = 1; | 
    
    | 65 |  |  |  | 
    
    | 66 |  |  | void | 
    
    | 67 |  |  | ENGINE_unregister_DH(ENGINE *e) | 
    
    | 68 |  |  | { | 
    
    | 69 |  |  | 	engine_table_unregister(&dh_table, e); | 
    
    | 70 |  |  | } | 
    
    | 71 |  |  |  | 
    
    | 72 |  |  | static void | 
    
    | 73 |  |  | engine_unregister_all_DH(void) | 
    
    | 74 |  |  | { | 
    
    | 75 |  |  | 	engine_table_cleanup(&dh_table); | 
    
    | 76 |  |  | } | 
    
    | 77 |  |  |  | 
    
    | 78 |  |  | int | 
    
    | 79 |  |  | ENGINE_register_DH(ENGINE *e) | 
    
    | 80 |  |  | { | 
    
    | 81 |  |  | 	if (e->dh_meth) | 
    
    | 82 |  |  | 		return engine_table_register(&dh_table, | 
    
    | 83 |  |  | 		    engine_unregister_all_DH, e, &dummy_nid, 1, 0); | 
    
    | 84 |  |  | 	return 1; | 
    
    | 85 |  |  | } | 
    
    | 86 |  |  |  | 
    
    | 87 |  |  | void | 
    
    | 88 |  |  | ENGINE_register_all_DH(void) | 
    
    | 89 |  |  | { | 
    
    | 90 |  |  | 	ENGINE *e; | 
    
    | 91 |  |  |  | 
    
    | 92 |  |  | 	for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) | 
    
    | 93 |  |  | 		ENGINE_register_DH(e); | 
    
    | 94 |  |  | } | 
    
    | 95 |  |  |  | 
    
    | 96 |  |  | int | 
    
    | 97 |  |  | ENGINE_set_default_DH(ENGINE *e) | 
    
    | 98 |  |  | { | 
    
    | 99 |  |  | 	if (e->dh_meth) | 
    
    | 100 |  |  | 		return engine_table_register(&dh_table, | 
    
    | 101 |  |  | 		    engine_unregister_all_DH, 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_DH(void) | 
    
    | 110 |  | 18 | { | 
    
    | 111 |  | 18 | 	return engine_table_select(&dh_table, dummy_nid); | 
    
    | 112 |  |  | } | 
    
    | 113 |  |  |  | 
    
    | 114 |  |  | /* Obtains an DH implementation from an ENGINE functional reference */ | 
    
    | 115 |  |  | const DH_METHOD * | 
    
    | 116 |  |  | ENGINE_get_DH(const ENGINE *e) | 
    
    | 117 |  |  | { | 
    
    | 118 |  |  | 	return e->dh_meth; | 
    
    | 119 |  |  | } | 
    
    | 120 |  |  |  | 
    
    | 121 |  |  | /* Sets an DH implementation in an ENGINE structure */ | 
    
    | 122 |  |  | int | 
    
    | 123 |  |  | ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth) | 
    
    | 124 |  |  | { | 
    
    | 125 |  |  | 	e->dh_meth = dh_meth; | 
    
    | 126 |  |  | 	return 1; | 
    
    | 127 |  |  | } |