crypto/evp/pmeth_gn.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 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 "internal/cryptlib.h"
  62 #include <openssl/objects.h>
  63 #include <openssl/evp.h>
  64 #include "internal/bn_int.h"
  65 #include "internal/evp_int.h"
  66
  67 int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
  68 {
  69     int ret;
  70     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
  71         EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
  72                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  73         return -2;
  74     }
  75     ctx->operation = EVP_PKEY_OP_PARAMGEN;
  76     if (!ctx->pmeth->paramgen_init)
  77         return 1;
  78     ret = ctx->pmeth->paramgen_init(ctx);
  79     if (ret <= 0)
  80         ctx->operation = EVP_PKEY_OP_UNDEFINED;
  81     return ret;
  82 }
  83
  84 int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
  85 {
  86     int ret;
  87     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
  88         EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
  89                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  90         return -2;
  91     }
  92
  93     if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
  94         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
  95         return -1;
  96     }
  97
  98     if (ppkey == NULL)
  99         return -1;
 100
 101     if (*ppkey == NULL)
 102         *ppkey = EVP_PKEY_new();
 103
 104     if (*ppkey == NULL) {
 105         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, ERR_R_MALLOC_FAILURE);
 106         return -1;
 107     }
 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 EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
 118 {
 119     int ret;
 120     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
 121         EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
 122                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 EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
 135 {
 136     int ret;
 137
 138     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
 139         EVPerr(EVP_F_EVP_PKEY_KEYGEN,
 140                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 141         return -2;
 142     }
 143     if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
 144         EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
 145         return -1;
 146     }
 147
 148     if (ppkey == NULL)
 149         return -1;
 150
 151     if (*ppkey == NULL)
 152         *ppkey = EVP_PKEY_new();
 153     if (*ppkey == NULL)
 154         return -1;
 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 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 *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
 170 {
 171     return ctx->pkey_gencb;
 172 }
 173
 174 /*
 175  * "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
 176  * callbacks.
 177  */
 178
 179 static int trans_cb(int a, int b, BN_GENCB *gcb)
 180 {
 181     EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
 182     ctx->keygen_info[0] = a;
 183     ctx->keygen_info[1] = b;
 184     return ctx->pkey_gencb(ctx);
 185 }
 186
 187 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
 188 {
 189     BN_GENCB_set(cb, trans_cb, ctx);
 190 }
 191
 192 int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
 193 {
 194     if (idx == -1)
 195         return ctx->keygen_info_count;
 196     if (idx < 0 || idx > ctx->keygen_info_count)
 197         return 0;
 198     return ctx->keygen_info[idx];
 199 }
 200
 201 EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
 202                                const unsigned char *key, int keylen)
 203 {
 204     EVP_PKEY_CTX *mac_ctx = NULL;
 205     EVP_PKEY *mac_key = NULL;
 206     mac_ctx = EVP_PKEY_CTX_new_id(type, e);
 207     if (!mac_ctx)
 208         return NULL;
 209     if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
 210         goto merr;
 211     if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
 212         goto merr;
 213     if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
 214         goto merr;
 215  merr:
 216     EVP_PKEY_CTX_free(mac_ctx);
 217     return mac_key;
 218 }