1 /* $OpenBSD: pmeth_gn.c,v 1.6 2017/01/29 17:49:23 beck 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 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 76 return -2; 77 } 78 ctx->operation = EVP_PKEY_OP_PARAMGEN; 79 if (!ctx->pmeth->paramgen_init) 80 return 1; 81 ret = ctx->pmeth->paramgen_init(ctx); 82 if (ret <= 0) 83 ctx->operation = EVP_PKEY_OP_UNDEFINED; 84 return ret; 85 } 86 87 int 88 EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) 89 { 90 int ret; 91 92 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) { 93 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 94 return -2; 95 } 96 97 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) { 98 EVPerror(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 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 123 return -2; 124 } 125 ctx->operation = EVP_PKEY_OP_KEYGEN; 126 if (!ctx->pmeth->keygen_init) 127 return 1; 128 ret = ctx->pmeth->keygen_init(ctx); 129 if (ret <= 0) 130 ctx->operation = EVP_PKEY_OP_UNDEFINED; 131 return ret; 132 } 133 134 int 135 EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) 136 { 137 int ret; 138 139 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { 140 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 141 return -2; 142 } 143 if (ctx->operation != EVP_PKEY_OP_KEYGEN) { 144 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED); 145 return -1; 146 } 147 148 if (!ppkey) 149 return -1; 150 151 if (!*ppkey) 152 *ppkey = EVP_PKEY_new(); 153 154 ret = ctx->pmeth->keygen(ctx, *ppkey); 155 if (ret <= 0) { 156 EVP_PKEY_free(*ppkey); 157 *ppkey = NULL; 158 } 159 return ret; 160 } 161 162 void 163 EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb) 164 { 165 ctx->pkey_gencb = cb; 166 } 167 168 EVP_PKEY_gen_cb * 169 EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx) 170 { 171 return ctx->pkey_gencb; 172 } 173 174 /* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB 175 * style callbacks. 176 */ 177 178 static int 179 trans_cb(int a, int b, BN_GENCB *gcb) 180 { 181 EVP_PKEY_CTX *ctx = gcb->arg; 182 ctx->keygen_info[0] = a; 183 ctx->keygen_info[1] = b; 184 return ctx->pkey_gencb(ctx); 185 } 186 187 void 188 evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx) 189 { 190 BN_GENCB_set(cb, trans_cb, ctx) 191 } 192 193 int 194 EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx) 195 { 196 if (idx == -1) 197 return ctx->keygen_info_count; 198 if (idx < 0 || idx > ctx->keygen_info_count) 199 return 0; 200 return ctx->keygen_info[idx]; 201 } 202 203 EVP_PKEY * 204 EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen) 205 { 206 EVP_PKEY_CTX *mac_ctx = NULL; 207 EVP_PKEY *mac_key = NULL; 208 209 mac_ctx = EVP_PKEY_CTX_new_id(type, e); 210 if (!mac_ctx) 211 return NULL; 212 if (EVP_PKEY_keygen_init(mac_ctx) <= 0) 213 goto merr; 214 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN, 215 EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0) 216 goto merr; 217 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0) 218 goto merr; 219 220 merr: 221 EVP_PKEY_CTX_free(mac_ctx); 222 return mac_key; 223 } 224