crypto/evp/pmeth_gn.c

   1 /* pmeth_gn.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2006.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include "internal/cryptlib.h"
  63 #include <openssl/objects.h>
  64 #include <openssl/evp.h>
  65 #include "internal/bn_int.h"
  66 #include "internal/evp_int.h"
  67
  68 int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
  69 {
  70     int ret;
  71     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
  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         EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
  90                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  91         return -2;
  92     }
  93
  94     if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
  95         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
  96         return -1;
  97     }
  98
  99     if (!ppkey)
 100         return -1;
 101
 102     if (!*ppkey)
 103         *ppkey = EVP_PKEY_new();
 104
 105     ret = ctx->pmeth->paramgen(ctx, *ppkey);
 106     if (ret <= 0) {
 107         EVP_PKEY_free(*ppkey);
 108         *ppkey = NULL;
 109     }
 110     return ret;
 111 }
 112
 113 int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
 114 {
 115     int ret;
 116     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
 117         EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
 118                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 119         return -2;
 120     }
 121     ctx->operation = EVP_PKEY_OP_KEYGEN;
 122     if (!ctx->pmeth->keygen_init)
 123         return 1;
 124     ret = ctx->pmeth->keygen_init(ctx);
 125     if (ret <= 0)
 126         ctx->operation = EVP_PKEY_OP_UNDEFINED;
 127     return ret;
 128 }
 129
 130 int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
 131 {
 132     int ret;
 133
 134     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
 135         EVPerr(EVP_F_EVP_PKEY_KEYGEN,
 136                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 137         return -2;
 138     }
 139     if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
 140         EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
 141         return -1;
 142     }
 143
 144     if (!ppkey)
 145         return -1;
 146
 147     if (!*ppkey)
 148         *ppkey = EVP_PKEY_new();
 149
 150     ret = ctx->pmeth->keygen(ctx, *ppkey);
 151     if (ret <= 0) {
 152         EVP_PKEY_free(*ppkey);
 153         *ppkey = NULL;
 154     }
 155     return ret;
 156 }
 157
 158 void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
 159 {
 160     ctx->pkey_gencb = cb;
 161 }
 162
 163 EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
 164 {
 165     return ctx->pkey_gencb;
 166 }
 167
 168 /*
 169  * "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
 170  * callbacks.
 171  */
 172
 173 static int trans_cb(int a, int b, BN_GENCB *gcb)
 174 {
 175     EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
 176     ctx->keygen_info[0] = a;
 177     ctx->keygen_info[1] = b;
 178     return ctx->pkey_gencb(ctx);
 179 }
 180
 181 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
 182 {
 183     BN_GENCB_set(cb, trans_cb, ctx);
 184 }
 185
 186 int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
 187 {
 188     if (idx == -1)
 189         return ctx->keygen_info_count;
 190     if (idx < 0 || idx > ctx->keygen_info_count)
 191         return 0;
 192     return ctx->keygen_info[idx];
 193 }
 194
 195 EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
 196                                const unsigned char *key, int keylen)
 197 {
 198     EVP_PKEY_CTX *mac_ctx = NULL;
 199     EVP_PKEY *mac_key = NULL;
 200     mac_ctx = EVP_PKEY_CTX_new_id(type, e);
 201     if (!mac_ctx)
 202         return NULL;
 203     if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
 204         goto merr;
 205     if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
 206         goto merr;
 207     if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
 208         goto merr;
 209  merr:
 210     EVP_PKEY_CTX_free(mac_ctx);
 211     return mac_key;
 212 }