release/src/router/openssl/crypto/cmac/cm_pmeth.c

   1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   2  * project 2010.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  */
  52
  53 #include <stdio.h>
  54 #include "cryptlib.h"
  55 #include <openssl/x509.h>
  56 #include <openssl/x509v3.h>
  57 #include <openssl/evp.h>
  58 #include <openssl/cmac.h>
  59 #include "evp_locl.h"
  60
  61 /* The context structure and "key" is simply a CMAC_CTX */
  62
  63 static int pkey_cmac_init(EVP_PKEY_CTX *ctx)
  64         {
  65         ctx->data = CMAC_CTX_new();
  66         if (!ctx->data)
  67                 return 0;
  68         ctx->keygen_info_count = 0;
  69         return 1;
  70         }
  71
  72 static int pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
  73         {
  74         if (!pkey_cmac_init(dst))
  75                 return 0;
  76         if (!CMAC_CTX_copy(dst->data, src->data))
  77                 return 0;
  78         return 1;
  79         }
  80
  81 static void pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)
  82         {
  83         CMAC_CTX_free(ctx->data);
  84         }
  85
  86 static int pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
  87         {
  88         CMAC_CTX *cmkey = CMAC_CTX_new();
  89         CMAC_CTX *cmctx = ctx->data;
  90         if (!cmkey)
  91                 return 0;
  92         if (!CMAC_CTX_copy(cmkey, cmctx))
  93                 {
  94                 CMAC_CTX_free(cmkey);
  95                 return 0;
  96                 }
  97         EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
  98
  99         return 1;
 100         }
 101
 102 static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count)
 103         {
 104         if (!CMAC_Update(ctx->pctx->data, data, count))
 105                 return 0;
 106         return 1;
 107         }
 108
 109 static int cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
 110         {
 111         EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
 112         mctx->update = int_update;
 113         return 1;
 114         }
 115
 116 static int cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 117                                         EVP_MD_CTX *mctx)
 118         {
 119         return CMAC_Final(ctx->data, sig, siglen);
 120         }
 121
 122 static int pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 123         {
 124         CMAC_CTX *cmctx = ctx->data;
 125         switch (type)
 126                 {
 127
 128                 case EVP_PKEY_CTRL_SET_MAC_KEY:
 129                 if (!p2 || p1 < 0)
 130                         return 0;
 131                 if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
 132                         return 0;
 133                 break;
 134
 135                 case EVP_PKEY_CTRL_CIPHER:
 136                 if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
 137                         return 0;
 138                 break;
 139
 140                 case EVP_PKEY_CTRL_MD:
 141                 if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
 142                                         (CMAC_CTX *)ctx->pkey->pkey.ptr))
 143                         return 0;
 144                 if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
 145                         return 0;
 146                 break;
 147
 148                 default:
 149                 return -2;
 150
 151                 }
 152         return 1;
 153         }
 154
 155 static int pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx,
 156                         const char *type, const char *value)
 157         {
 158         if (!value)
 159                 {
 160                 return 0;
 161                 }
 162         if (!strcmp(type, "key"))
 163                 {
 164                 void *p = (void *)value;
 165                 return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
 166                                                                 strlen(p), p);
 167                 }
 168         if (!strcmp(type, "cipher"))
 169                 {
 170                 const EVP_CIPHER *c;
 171                 c = EVP_get_cipherbyname(value);
 172                 if (!c)
 173                         return 0;
 174                 return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
 175                 }
 176         if (!strcmp(type, "hexkey"))
 177                 {
 178                 unsigned char *key;
 179                 int r;
 180                 long keylen;
 181                 key = string_to_hex(value, &keylen);
 182                 if (!key)
 183                         return 0;
 184                 r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
 185                 OPENSSL_free(key);
 186                 return r;
 187                 }
 188         return -2;
 189         }
 190
 191 const EVP_PKEY_METHOD cmac_pkey_meth =
 192         {
 193         EVP_PKEY_CMAC,
 194         EVP_PKEY_FLAG_SIGCTX_CUSTOM,
 195         pkey_cmac_init,
 196         pkey_cmac_copy,
 197         pkey_cmac_cleanup,
 198
 199         0, 0,
 200
 201         0,
 202         pkey_cmac_keygen,
 203
 204         0, 0,
 205
 206         0, 0,
 207
 208         0,0,
 209
 210         cmac_signctx_init,
 211         cmac_signctx,
 212
 213         0,0,
 214
 215         0,0,
 216
 217         0,0,
 218
 219         0,0,
 220
 221         pkey_cmac_ctrl,
 222         pkey_cmac_ctrl_str
 223
 224         };