1 /* $OpenBSD: pmeth_gn.c,v 1.3 2014/06/12 15:49:29 deraadt Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 2006. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include "cryptlib.h" 62 #include <openssl/objects.h> 63 #include <openssl/evp.h> 64 #include <openssl/bn.h> 65 #include "evp_locl.h" 66 67 int 68 EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx) 69 { 70 int ret; 71 72 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) { 73 EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT, 74 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 75 return -2; 76 } 77 ctx->operation = EVP_PKEY_OP_PARAMGEN; 78 if (!ctx->pmeth->paramgen_init) 79 return 1; 80 ret = ctx->pmeth->paramgen_init(ctx); 81 if (ret <= 0) 82 ctx->operation = EVP_PKEY_OP_UNDEFINED; 83 return ret; 84 } 85 86 int 87 EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) 88 { 89 int ret; 90 91 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) { 92 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, 93 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 94 return -2; 95 } 96 97 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) { 98 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED); 99 return -1; 100 } 101 102 if (!ppkey) 103 return -1; 104 105 if (!*ppkey) 106 *ppkey = EVP_PKEY_new(); 107 108 ret = ctx->pmeth->paramgen(ctx, *ppkey); 109 if (ret <= 0) { 110 EVP_PKEY_free(*ppkey); 111 *ppkey = NULL; 112 } 113 return ret; 114 } 115 116 int 117 EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx) 118 { 119 int ret; 120 121 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { 122 EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT, 123 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 124 return -2; 125 } 126 ctx->operation = EVP_PKEY_OP_KEYGEN; 127 if (!ctx->pmeth->keygen_init) 128 return 1; 129 ret = ctx->pmeth->keygen_init(ctx); 130 if (ret <= 0) 131 ctx->operation = EVP_PKEY_OP_UNDEFINED; 132 return ret; 133 } 134 135 int 136 EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) 137 { 138 int ret; 139 140 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { 141 EVPerr(EVP_F_EVP_PKEY_KEYGEN, 142 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 143 return -2; 144 } 145 if (ctx->operation != EVP_PKEY_OP_KEYGEN) { 146 EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED); 147 return -1; 148 } 149 150 if (!ppkey) 151 return -1; 152 153 if (!*ppkey) 154 *ppkey = EVP_PKEY_new(); 155 156 ret = ctx->pmeth->keygen(ctx, *ppkey); 157 if (ret <= 0) { 158 EVP_PKEY_free(*ppkey); 159 *ppkey = NULL; 160 } 161 return ret; 162 } 163 164 void 165 EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb) 166 { 167 ctx->pkey_gencb = cb; 168 } 169 170 EVP_PKEY_gen_cb * 171 EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx) 172 { 173 return ctx->pkey_gencb; 174 } 175 176 /* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB 177 * style callbacks. 178 */ 179 180 static int 181 trans_cb(int a, int b, BN_GENCB *gcb) 182 { 183 EVP_PKEY_CTX *ctx = gcb->arg; 184 ctx->keygen_info[0] = a; 185 ctx->keygen_info[1] = b; 186 return ctx->pkey_gencb(ctx); 187 } 188 189 void 190 evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx) 191 { 192 BN_GENCB_set(cb, trans_cb, ctx) 193 } 194 195 int 196 EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx) 197 { 198 if (idx == -1) 199 return ctx->keygen_info_count; 200 if (idx < 0 || idx > ctx->keygen_info_count) 201 return 0; 202 return ctx->keygen_info[idx]; 203 } 204 205 EVP_PKEY * 206 EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen) 207 { 208 EVP_PKEY_CTX *mac_ctx = NULL; 209 EVP_PKEY *mac_key = NULL; 210 211 mac_ctx = EVP_PKEY_CTX_new_id(type, e); 212 if (!mac_ctx) 213 return NULL; 214 if (EVP_PKEY_keygen_init(mac_ctx) <= 0) 215 goto merr; 216 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN, 217 EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0) 218 goto merr; 219 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0) 220 goto merr; 221 222 merr: 223 if (mac_ctx) 224 EVP_PKEY_CTX_free(mac_ctx); 225 return mac_key; 226 } 227