release/src/router/openssl/crypto/dsa/dsa_pmeth.c

   1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   2  * project 2006.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2006 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  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include <stdio.h>
  59 #include "cryptlib.h"
  60 #include <openssl/asn1t.h>
  61 #include <openssl/x509.h>
  62 #include <openssl/evp.h>
  63 #include <openssl/bn.h>
  64 #include "evp_locl.h"
  65 #include "dsa_locl.h"
  66
  67 /* DSA pkey context structure */
  68
  69 typedef struct
  70         {
  71         /* Parameter gen parameters */
  72         int nbits;              /* size of p in bits (default: 1024) */
  73         int qbits;              /* size of q in bits (default: 160)  */
  74         const EVP_MD *pmd;      /* MD for parameter generation */
  75         /* Keygen callback info */
  76         int gentmp[2];
  77         /* message digest */
  78         const EVP_MD *md;       /* MD for the signature */
  79         } DSA_PKEY_CTX;
  80
  81 static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
  82         {
  83         DSA_PKEY_CTX *dctx;
  84         dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
  85         if (!dctx)
  86                 return 0;
  87         dctx->nbits = 1024;
  88         dctx->qbits = 160;
  89         dctx->pmd = NULL;
  90         dctx->md = NULL;
  91
  92         ctx->data = dctx;
  93         ctx->keygen_info = dctx->gentmp;
  94         ctx->keygen_info_count = 2;
  95
  96         return 1;
  97         }
  98
  99 static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
 100         {
 101         DSA_PKEY_CTX *dctx, *sctx;
 102         if (!pkey_dsa_init(dst))
 103                 return 0;
 104         sctx = src->data;
 105         dctx = dst->data;
 106         dctx->nbits = sctx->nbits;
 107         dctx->qbits = sctx->qbits;
 108         dctx->pmd = sctx->pmd;
 109         dctx->md  = sctx->md;
 110         return 1;
 111         }
 112
 113 static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)
 114         {
 115         DSA_PKEY_CTX *dctx = ctx->data;
 116         if (dctx)
 117                 OPENSSL_free(dctx);
 118         }
 119
 120 static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 121                                         const unsigned char *tbs, size_t tbslen)
 122         {
 123         int ret, type;
 124         unsigned int sltmp;
 125         DSA_PKEY_CTX *dctx = ctx->data;
 126         DSA *dsa = ctx->pkey->pkey.dsa;
 127
 128         if (dctx->md)
 129                 type = EVP_MD_type(dctx->md);
 130         else
 131                 type = NID_sha1;
 132
 133         ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
 134
 135         if (ret <= 0)
 136                 return ret;
 137         *siglen = sltmp;
 138         return 1;
 139         }
 140
 141 static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
 142                                         const unsigned char *sig, size_t siglen,
 143                                         const unsigned char *tbs, size_t tbslen)
 144         {
 145         int ret, type;
 146         DSA_PKEY_CTX *dctx = ctx->data;
 147         DSA *dsa = ctx->pkey->pkey.dsa;
 148
 149         if (dctx->md)
 150                 type = EVP_MD_type(dctx->md);
 151         else
 152                 type = NID_sha1;
 153
 154         ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
 155
 156         return ret;
 157         }
 158
 159 static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 160         {
 161         DSA_PKEY_CTX *dctx = ctx->data;
 162         switch (type)
 163                 {
 164                 case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
 165                 if (p1 < 256)
 166                         return -2;
 167                 dctx->nbits = p1;
 168                 return 1;
 169
 170                 case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
 171                 if (p1 != 160 && p1 != 224 && p1 && p1 != 256)
 172                         return -2;
 173                 dctx->qbits = p1;
 174                 return 1;
 175
 176                 case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
 177                 if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1   &&
 178                     EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
 179                     EVP_MD_type((const EVP_MD *)p2) != NID_sha256)
 180                         {
 181                         DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
 182                         return 0;
 183                         }
 184                 dctx->md = p2;
 185                 return 1;
 186
 187                 case EVP_PKEY_CTRL_MD:
 188                 if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1   &&
 189                     EVP_MD_type((const EVP_MD *)p2) != NID_dsa    &&
 190                     EVP_MD_type((const EVP_MD *)p2) != NID_dsaWithSHA    &&
 191                     EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
 192                     EVP_MD_type((const EVP_MD *)p2) != NID_sha256 &&
 193                     EVP_MD_type((const EVP_MD *)p2) != NID_sha384 &&
 194                     EVP_MD_type((const EVP_MD *)p2) != NID_sha512)
 195                         {
 196                         DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
 197                         return 0;
 198                         }
 199                 dctx->md = p2;
 200                 return 1;
 201
 202                 case EVP_PKEY_CTRL_DIGESTINIT:
 203                 case EVP_PKEY_CTRL_PKCS7_SIGN:
 204                 case EVP_PKEY_CTRL_CMS_SIGN:
 205                 return 1;
 206
 207                 case EVP_PKEY_CTRL_PEER_KEY:
 208                         DSAerr(DSA_F_PKEY_DSA_CTRL,
 209                         EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 210                         return -2;
 211                 default:
 212                 return -2;
 213
 214                 }
 215         }
 216
 217 static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
 218                         const char *type, const char *value)
 219         {
 220         if (!strcmp(type, "dsa_paramgen_bits"))
 221                 {
 222                 int nbits;
 223                 nbits = atoi(value);
 224                 return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
 225                 }
 226         if (!strcmp(type, "dsa_paramgen_q_bits"))
 227                 {
 228                 int qbits = atoi(value);
 229                 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
 230                                          EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, NULL);
 231                 }
 232         if (!strcmp(type, "dsa_paramgen_md"))
 233                 {
 234                 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
 235                                          EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
 236                                          (void *)EVP_get_digestbyname(value));
 237                 }
 238         return -2;
 239         }
 240
 241 static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
 242         {
 243         DSA *dsa = NULL;
 244         DSA_PKEY_CTX *dctx = ctx->data;
 245         BN_GENCB *pcb, cb;
 246         int ret;
 247         if (ctx->pkey_gencb)
 248                 {
 249                 pcb = &cb;
 250                 evp_pkey_set_cb_translate(pcb, ctx);
 251                 }
 252         else
 253                 pcb = NULL;
 254         dsa = DSA_new();
 255         if (!dsa)
 256                 return 0;
 257         ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,
 258                                    NULL, 0, NULL, NULL, NULL, pcb);
 259         if (ret)
 260                 EVP_PKEY_assign_DSA(pkey, dsa);
 261         else
 262                 DSA_free(dsa);
 263         return ret;
 264         }
 265
 266 static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
 267         {
 268         DSA *dsa = NULL;
 269         if (ctx->pkey == NULL)
 270                 {
 271                 DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
 272                 return 0;
 273                 }
 274         dsa = DSA_new();
 275         if (!dsa)
 276                 return 0;
 277         EVP_PKEY_assign_DSA(pkey, dsa);
 278         /* Note: if error return, pkey is freed by parent routine */
 279         if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
 280                 return 0;
 281         return DSA_generate_key(pkey->pkey.dsa);
 282         }
 283
 284 const EVP_PKEY_METHOD dsa_pkey_meth =
 285         {
 286         EVP_PKEY_DSA,
 287         EVP_PKEY_FLAG_AUTOARGLEN,
 288         pkey_dsa_init,
 289         pkey_dsa_copy,
 290         pkey_dsa_cleanup,
 291
 292         0,
 293         pkey_dsa_paramgen,
 294
 295         0,
 296         pkey_dsa_keygen,
 297
 298         0,
 299         pkey_dsa_sign,
 300
 301         0,
 302         pkey_dsa_verify,
 303
 304         0,0,
 305
 306         0,0,0,0,
 307
 308         0,0,
 309
 310         0,0,
 311
 312         0,0,
 313
 314         pkey_dsa_ctrl,
 315         pkey_dsa_ctrl_str
 316
 317
 318         };