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