1 /* $OpenBSD: pmeth_gn.c,v 1.5 2014/07/12 16:03:37 miod 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 62 #include <openssl/bn.h> 63 #include <openssl/err.h> 64 #include <openssl/evp.h> 65 #include <openssl/objects.h> 66 67 #include "evp_locl.h" 68 69 int 70 EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx) 71 { 72 int ret; 73 74 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) { 75 EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT, 76 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 77 return -2; 78 } 79 ctx->operation = EVP_PKEY_OP_PARAMGEN; 80 if (!ctx->pmeth->paramgen_init) 81 return 1; 82 ret = ctx->pmeth->paramgen_init(ctx); 83 if (ret <= 0) 84 ctx->operation = EVP_PKEY_OP_UNDEFINED; 85 return ret; 86 } 87 88 int 89 EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) 90 { 91 int ret; 92 93 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) { 94 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, 95 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 96 return -2; 97 } 98 99 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) { 100 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED); 101 return -1; 102 } 103 104 if (!ppkey) 105 return -1; 106 107 if (!*ppkey) 108 *ppkey = EVP_PKEY_new(); 109 110 ret = ctx->pmeth->paramgen(ctx, *ppkey); 111 if (ret <= 0) { 112 EVP_PKEY_free(*ppkey); 113 *ppkey = NULL; 114 } 115 return ret; 116 } 117 118 int 119 EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx) 120 { 121 int ret; 122 123 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { 124 EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT, 125 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 126 return -2; 127 } 128 ctx->operation = EVP_PKEY_OP_KEYGEN; 129 if (!ctx->pmeth->keygen_init) 130 return 1; 131 ret = ctx->pmeth->keygen_init(ctx); 132 if (ret <= 0) 133 ctx->operation = EVP_PKEY_OP_UNDEFINED; 134 return ret; 135 } 136 137 int 138 EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) 139 { 140 int ret; 141 142 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { 143 EVPerr(EVP_F_EVP_PKEY_KEYGEN, 144 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 145 return -2; 146 } 147 if (ctx->operation != EVP_PKEY_OP_KEYGEN) { 148 EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED); 149 return -1; 150 } 151 152 if (!ppkey) 153 return -1; 154 155 if (!*ppkey) 156 *ppkey = EVP_PKEY_new(); 157 158 ret = ctx->pmeth->keygen(ctx, *ppkey); 159 if (ret <= 0) { 160 EVP_PKEY_free(*ppkey); 161 *ppkey = NULL; 162 } 163 return ret; 164 } 165 166 void 167 EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb) 168 { 169 ctx->pkey_gencb = cb; 170 } 171 172 EVP_PKEY_gen_cb * 173 EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx) 174 { 175 return ctx->pkey_gencb; 176 } 177 178 /* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB 179 * style callbacks. 180 */ 181 182 static int 183 trans_cb(int a, int b, BN_GENCB *gcb) 184 { 185 EVP_PKEY_CTX *ctx = gcb->arg; 186 ctx->keygen_info[0] = a; 187 ctx->keygen_info[1] = b; 188 return ctx->pkey_gencb(ctx); 189 } 190 191 void 192 evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx) 193 { 194 BN_GENCB_set(cb, trans_cb, ctx) 195 } 196 197 int 198 EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx) 199 { 200 if (idx == -1) 201 return ctx->keygen_info_count; 202 if (idx < 0 || idx > ctx->keygen_info_count) 203 return 0; 204 return ctx->keygen_info[idx]; 205 } 206 207 EVP_PKEY * 208 EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen) 209 { 210 EVP_PKEY_CTX *mac_ctx = NULL; 211 EVP_PKEY *mac_key = NULL; 212 213 mac_ctx = EVP_PKEY_CTX_new_id(type, e); 214 if (!mac_ctx) 215 return NULL; 216 if (EVP_PKEY_keygen_init(mac_ctx) <= 0) 217 goto merr; 218 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN, 219 EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0) 220 goto merr; 221 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0) 222 goto merr; 223 224 merr: 225 EVP_PKEY_CTX_free(mac_ctx); 226 return mac_key; 227 } 228