1 /* $OpenBSD: pmeth_gn.c,v 1.8 2021/12/04 16:08:32 tb 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 "bn_lcl.h" 68 #include "evp_locl.h" 69 70 int 71 EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx) 72 { 73 int ret; 74 75 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) { 76 EVPerror(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 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 95 return -2; 96 } 97 98 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) { 99 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED); 100 return -1; 101 } 102 103 if (!ppkey) 104 return -1; 105 106 if (!*ppkey) 107 *ppkey = EVP_PKEY_new(); 108 109 ret = ctx->pmeth->paramgen(ctx, *ppkey); 110 if (ret <= 0) { 111 EVP_PKEY_free(*ppkey); 112 *ppkey = NULL; 113 } 114 return ret; 115 } 116 117 int 118 EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx) 119 { 120 int ret; 121 122 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { 123 EVPerror(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 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); 142 return -2; 143 } 144 if (ctx->operation != EVP_PKEY_OP_KEYGEN) { 145 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED); 146 return -1; 147 } 148 149 if (!ppkey) 150 return -1; 151 152 if (!*ppkey) 153 *ppkey = EVP_PKEY_new(); 154 155 ret = ctx->pmeth->keygen(ctx, *ppkey); 156 if (ret <= 0) { 157 EVP_PKEY_free(*ppkey); 158 *ppkey = NULL; 159 } 160 return ret; 161 } 162 163 void 164 EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb) 165 { 166 ctx->pkey_gencb = cb; 167 } 168 169 EVP_PKEY_gen_cb * 170 EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx) 171 { 172 return ctx->pkey_gencb; 173 } 174 175 /* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB 176 * style callbacks. 177 */ 178 179 static int 180 trans_cb(int a, int b, BN_GENCB *gcb) 181 { 182 EVP_PKEY_CTX *ctx = gcb->arg; 183 ctx->keygen_info[0] = a; 184 ctx->keygen_info[1] = b; 185 return ctx->pkey_gencb(ctx); 186 } 187 188 void 189 evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx) 190 { 191 BN_GENCB_set(cb, trans_cb, ctx); 192 } 193 194 int 195 EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx) 196 { 197 if (idx == -1) 198 return ctx->keygen_info_count; 199 if (idx < 0 || idx > ctx->keygen_info_count) 200 return 0; 201 return ctx->keygen_info[idx]; 202 } 203 204 EVP_PKEY * 205 EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen) 206 { 207 EVP_PKEY_CTX *mac_ctx = NULL; 208 EVP_PKEY *mac_key = NULL; 209 210 mac_ctx = EVP_PKEY_CTX_new_id(type, e); 211 if (!mac_ctx) 212 return NULL; 213 if (EVP_PKEY_keygen_init(mac_ctx) <= 0) 214 goto merr; 215 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN, 216 EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0) 217 goto merr; 218 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0) 219 goto merr; 220 221 merr: 222 EVP_PKEY_CTX_free(mac_ctx); 223 return mac_key; 224 } 225