crypto/rsa/rsa_ameth.c

   1 /* crypto/rsa/rsa_ameth.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 "cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/x509.h>
  63 #include <openssl/rsa.h>
  64 #ifndef OPENSSL_NO_CMS
  65 #include <openssl/cms.h>
  66 #endif
  67 #include "asn1_locl.h"
  68
  69 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
  70         {
  71         unsigned char *penc = NULL;
  72         int penclen;
  73         penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
  74         if (penclen <= 0)
  75                 return 0;
  76         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
  77                                 V_ASN1_NULL, NULL, penc, penclen))
  78                 return 1;
  79
  80         OPENSSL_free(penc);
  81         return 0;
  82         }
  83
  84 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  85         {
  86         const unsigned char *p;
  87         int pklen;
  88         RSA *rsa = NULL;
  89         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
  90                 return 0;
  91         if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen)))
  92                 {
  93                 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
  94                 return 0;
  95                 }
  96         EVP_PKEY_assign_RSA (pkey, rsa);
  97         return 1;
  98         }
  99
 100 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 101         {
 102         if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
 103                 || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
 104                         return 0;
 105         return 1;
 106         }
 107
 108 static int old_rsa_priv_decode(EVP_PKEY *pkey,
 109                                         const unsigned char **pder, int derlen)
 110         {
 111         RSA *rsa;
 112         if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen)))
 113                 {
 114                 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
 115                 return 0;
 116                 }
 117         EVP_PKEY_assign_RSA(pkey, rsa);
 118         return 1;
 119         }
 120
 121 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 122         {
 123         return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
 124         }
 125
 126 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 127         {
 128         unsigned char *rk = NULL;
 129         int rklen;
 130         rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
 131
 132         if (rklen <= 0)
 133                 {
 134                 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 135                 return 0;
 136                 }
 137
 138         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
 139                                 V_ASN1_NULL, NULL, rk, rklen))
 140                 {
 141                 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 142                 return 0;
 143                 }
 144
 145         return 1;
 146         }
 147
 148 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 149         {
 150         const unsigned char *p;
 151         int pklen;
 152         if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
 153                 return 0;
 154         return old_rsa_priv_decode(pkey, &p, pklen);
 155         }
 156
 157 static int int_rsa_size(const EVP_PKEY *pkey)
 158         {
 159         return RSA_size(pkey->pkey.rsa);
 160         }
 161
 162 static int rsa_bits(const EVP_PKEY *pkey)
 163         {
 164         return BN_num_bits(pkey->pkey.rsa->n);
 165         }
 166
 167 static void int_rsa_free(EVP_PKEY *pkey)
 168         {
 169         RSA_free(pkey->pkey.rsa);
 170         }
 171
 172
 173 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 174         {
 175         size_t i;
 176         if (!b)
 177                 return;
 178         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 179                         *pbuflen = i;
 180         }
 181
 182 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
 183         {
 184         char *str;
 185         const char *s;
 186         unsigned char *m=NULL;
 187         int ret=0, mod_len = 0;
 188         size_t buf_len=0;
 189
 190         update_buflen(x->n, &buf_len);
 191         update_buflen(x->e, &buf_len);
 192
 193         if (priv)
 194                 {
 195                 update_buflen(x->d, &buf_len);
 196                 update_buflen(x->p, &buf_len);
 197                 update_buflen(x->q, &buf_len);
 198                 update_buflen(x->dmp1, &buf_len);
 199                 update_buflen(x->dmq1, &buf_len);
 200                 update_buflen(x->iqmp, &buf_len);
 201                 }
 202
 203         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
 204         if (m == NULL)
 205                 {
 206                 RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE);
 207                 goto err;
 208                 }
 209
 210         if (x->n != NULL)
 211                 mod_len = BN_num_bits(x->n);
 212
 213         if(!BIO_indent(bp,off,128))
 214                 goto err;
 215
 216         if (priv && x->d)
 217                 {
 218                 if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
 219                         <= 0) goto err;
 220                 str = "modulus:";
 221                 s = "publicExponent:";
 222                 }
 223         else
 224                 {
 225                 if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
 226                         <= 0) goto err;
 227                 str = "Modulus:";
 228                 s= "Exponent:";
 229                 }
 230         if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
 231         if (!ASN1_bn_print(bp,s,x->e,m,off))
 232                 goto err;
 233         if (priv)
 234                 {
 235                 if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
 236                         goto err;
 237                 if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
 238                         goto err;
 239                 if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
 240                         goto err;
 241                 if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
 242                         goto err;
 243                 if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
 244                         goto err;
 245                 if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
 246                         goto err;
 247                 }
 248         ret=1;
 249 err:
 250         if (m != NULL) OPENSSL_free(m);
 251         return(ret);
 252         }
 253
 254 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 255                                                         ASN1_PCTX *ctx)
 256         {
 257         return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
 258         }
 259
 260
 261 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 262                                                         ASN1_PCTX *ctx)
 263         {
 264         return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
 265         }
 266
 267
 268 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 269         {
 270         switch (op)
 271                 {
 272
 273                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 274                 if (arg1 == 0)
 275                         {
 276                         X509_ALGOR *alg;
 277                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
 278                         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
 279                                                         V_ASN1_NULL, 0);
 280                         }
 281                 return 1;
 282
 283                 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 284                 if (arg1 == 0)
 285                         {
 286                         X509_ALGOR *alg;
 287                         PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
 288                         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
 289                                                         V_ASN1_NULL, 0);
 290                         }
 291                 return 1;
 292 #ifndef OPENSSL_NO_CMS
 293                 case ASN1_PKEY_CTRL_CMS_SIGN:
 294                 if (arg1 == 0)
 295                         {
 296                         X509_ALGOR *alg;
 297                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg);
 298                         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
 299                                                         V_ASN1_NULL, 0);
 300                         }
 301                 return 1;
 302 #endif
 303
 304                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 305                 *(int *)arg2 = NID_sha1;
 306                 return 1;
 307
 308                 default:
 309                 return -2;
 310
 311                 }
 312
 313         }
 314
 315
 316 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
 317         {
 318                 {
 319                 EVP_PKEY_RSA,
 320                 EVP_PKEY_RSA,
 321                 ASN1_PKEY_SIGPARAM_NULL,
 322
 323                 "RSA",
 324                 "OpenSSL RSA method",
 325
 326                 rsa_pub_decode,
 327                 rsa_pub_encode,
 328                 rsa_pub_cmp,
 329                 rsa_pub_print,
 330
 331                 rsa_priv_decode,
 332                 rsa_priv_encode,
 333                 rsa_priv_print,
 334
 335                 int_rsa_size,
 336                 rsa_bits,
 337
 338                 0,0,0,0,0,0,
 339
 340                 int_rsa_free,
 341                 rsa_pkey_ctrl,
 342                 old_rsa_priv_decode,
 343                 old_rsa_priv_encode
 344                 },
 345
 346                 {
 347                 EVP_PKEY_RSA2,
 348                 EVP_PKEY_RSA,
 349                 ASN1_PKEY_ALIAS
 350                 }
 351         };