release/src/router/openssl/crypto/evp/pmeth_gn.c

   1 /* pmeth_gn.c */
   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 EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
  68         {
  69         int ret;
  70         if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen)
  71                 {
  72                 EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
  73                         EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  74                 return -2;
  75                 }
  76         ctx->operation = EVP_PKEY_OP_PARAMGEN;
  77         if (!ctx->pmeth->paramgen_init)
  78                 return 1;
  79         ret = ctx->pmeth->paramgen_init(ctx);
  80         if (ret <= 0)
  81                 ctx->operation = EVP_PKEY_OP_UNDEFINED;
  82         return ret;
  83         }
  84
  85 int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
  86         {
  87         int ret;
  88         if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen)
  89                 {
  90                 EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
  91                         EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  92                 return -2;
  93                 }
  94
  95         if (ctx->operation != EVP_PKEY_OP_PARAMGEN)
  96                 {
  97                 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
  98                 return -1;
  99                 }
 100
 101         if (!ppkey)
 102                 return -1;
 103
 104         if (!*ppkey)
 105                 *ppkey = EVP_PKEY_new();
 106
 107         ret = ctx->pmeth->paramgen(ctx, *ppkey);
 108         if (ret <= 0)
 109                 {
 110                 EVP_PKEY_free(*ppkey);
 111                 *ppkey = NULL;
 112                 }
 113         return ret;
 114         }
 115
 116 int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
 117         {
 118         int ret;
 119         if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen)
 120                 {
 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                 {
 140                 EVPerr(EVP_F_EVP_PKEY_KEYGEN,
 141                         EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 142                 return -2;
 143                 }
 144         if (ctx->operation != EVP_PKEY_OP_KEYGEN)
 145                 {
 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                 {
 159                 EVP_PKEY_free(*ppkey);
 160                 *ppkey = NULL;
 161                 }
 162         return ret;
 163         }
 164
 165 void 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 *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 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 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_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN,
 212                                 EVP_PKEY_CTRL_SET_MAC_KEY,
 213                                 keylen, (void *)key) <= 0)
 214                 goto merr;
 215         if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
 216                 goto merr;
 217         merr:
 218         if (mac_ctx)
 219                 EVP_PKEY_CTX_free(mac_ctx);
 220         return mac_key;
 221         }