1 /* ==================================================================== 2 * Copyright (c) 2006 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 51 * Hudson (tjh (at) cryptsoft.com). 52 * 53 */ 54 55 #include "eng_int.h" 56 #include <openssl/evp.h> 57 58 /* If this symbol is defined then ENGINE_get_pkey_meth_engine(), the function 59 * that is used by EVP to hook in pkey_meth code and cache defaults (etc), will 60 * display brief debugging summaries to stderr with the 'nid'. */ 61 /* #define ENGINE_PKEY_METH_DEBUG */ 62 63 static ENGINE_TABLE *pkey_meth_table = NULL; 64 65 void ENGINE_unregister_pkey_meths(ENGINE *e) 66 { 67 engine_table_unregister(&pkey_meth_table, e); 68 } 69 70 static void engine_unregister_all_pkey_meths(void) 71 { 72 engine_table_cleanup(&pkey_meth_table); 73 } 74 75 int ENGINE_register_pkey_meths(ENGINE *e) 76 { 77 if(e->pkey_meths) 78 { 79 const int *nids; 80 int num_nids = e->pkey_meths(e, NULL, &nids, 0); 81 if(num_nids > 0) 82 return engine_table_register(&pkey_meth_table, 83 engine_unregister_all_pkey_meths, e, nids, 84 num_nids, 0); 85 } 86 return 1; 87 } 88 89 void ENGINE_register_all_pkey_meths() 90 { 91 ENGINE *e; 92 93 for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e)) 94 ENGINE_register_pkey_meths(e); 95 } 96 97 int ENGINE_set_default_pkey_meths(ENGINE *e) 98 { 99 if(e->pkey_meths) 100 { 101 const int *nids; 102 int num_nids = e->pkey_meths(e, NULL, &nids, 0); 103 if(num_nids > 0) 104 return engine_table_register(&pkey_meth_table, 105 engine_unregister_all_pkey_meths, e, nids, 106 num_nids, 1); 107 } 108 return 1; 109 } 110 111 /* Exposed API function to get a functional reference from the implementation 112 * table (ie. try to get a functional reference from the tabled structural 113 * references) for a given pkey_meth 'nid' */ 114 ENGINE *ENGINE_get_pkey_meth_engine(int nid) 115 { 116 return engine_table_select(&pkey_meth_table, nid); 117 } 118 119 /* Obtains a pkey_meth implementation from an ENGINE functional reference */ 120 const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid) 121 { 122 EVP_PKEY_METHOD *ret; 123 ENGINE_PKEY_METHS_PTR fn = ENGINE_get_pkey_meths(e); 124 if(!fn || !fn(e, &ret, NULL, nid)) 125 { 126 ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_METH, 127 ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD); 128 return NULL; 129 } 130 return ret; 131 } 132 133 /* Gets the pkey_meth callback from an ENGINE structure */ 134 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e) 135 { 136 return e->pkey_meths; 137 } 138 139 /* Sets the pkey_meth callback in an ENGINE structure */ 140 int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f) 141 { 142 e->pkey_meths = f; 143 return 1; 144 } 145 146 /* Internal function to free up EVP_PKEY_METHOD structures before an 147 * ENGINE is destroyed 148 */ 149 150 void engine_pkey_meths_free(ENGINE *e) 151 { 152 int i; 153 EVP_PKEY_METHOD *pkm; 154 if (e->pkey_meths) 155 { 156 const int *pknids; 157 int npknids; 158 npknids = e->pkey_meths(e, NULL, &pknids, 0); 159 for (i = 0; i < npknids; i++) 160 { 161 if (e->pkey_meths(e, &pkm, NULL, pknids[i])) 162 { 163 EVP_PKEY_meth_free(pkm); 164 } 165 } 166 } 167 } 168
