crypto/rsa/rsa_ameth.c

   1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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/rsa.h>
  63 #include "asn1_locl.h"
  64
  65 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
  66         {
  67         unsigned char *penc = NULL;
  68         int penclen;
  69         penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
  70         if (penclen <= 0)
  71                 return 0;
  72         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
  73                                 V_ASN1_NULL, NULL, penc, penclen))
  74                 return 1;
  75
  76         OPENSSL_free(penc);
  77         return 0;
  78         }
  79
  80 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  81         {
  82         const unsigned char *p;
  83         int pklen;
  84         RSA *rsa = NULL;
  85         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
  86                 return 0;
  87         if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen)))
  88                 {
  89                 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
  90                 return 0;
  91                 }
  92         EVP_PKEY_assign_RSA (pkey, rsa);
  93         return 1;
  94         }
  95
  96 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
  97         {
  98         if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
  99                 || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
 100                         return 0;
 101         return 1;
 102         }
 103
 104 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 105         {
 106         const unsigned char *p;
 107         int pklen;
 108         RSA *rsa = NULL;
 109         if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
 110                 return 0;
 111         if (!(rsa = d2i_RSAPrivateKey (NULL, &p, pklen)))
 112                 {
 113                 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
 114                 return 0;
 115                 }
 116         EVP_PKEY_assign_RSA (pkey, rsa);
 117         return 1;
 118         }
 119
 120 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 121         {
 122         unsigned char *rk = NULL;
 123         int rklen;
 124         rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
 125
 126         if (rklen <= 0)
 127                 {
 128                 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 129                 return 0;
 130                 }
 131
 132         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
 133                                 V_ASN1_NULL, NULL, rk, rklen))
 134                 {
 135                 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
 136                 return 0;
 137                 }
 138
 139         return 1;
 140         }
 141
 142 static int int_rsa_size(const EVP_PKEY *pkey)
 143         {
 144         return RSA_size(pkey->pkey.rsa);
 145         }
 146
 147 static int rsa_bits(const EVP_PKEY *pkey)
 148         {
 149         return BN_num_bits(pkey->pkey.rsa->n);
 150         }
 151
 152 static void int_rsa_free(EVP_PKEY *pkey)
 153         {
 154         RSA_free(pkey->pkey.rsa);
 155         }
 156
 157
 158 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
 159         {
 160         int i;
 161         if (!b)
 162                 return;
 163         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
 164                         *pbuflen = i;
 165         }
 166
 167 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
 168         {
 169         char *str;
 170         const char *s;
 171         unsigned char *m=NULL;
 172         int ret=0, mod_len = 0;
 173         size_t buf_len=0;
 174
 175         update_buflen(x->n, &buf_len);
 176         update_buflen(x->e, &buf_len);
 177
 178         if (priv)
 179                 {
 180                 update_buflen(x->d, &buf_len);
 181                 update_buflen(x->p, &buf_len);
 182                 update_buflen(x->q, &buf_len);
 183                 update_buflen(x->dmp1, &buf_len);
 184                 update_buflen(x->dmq1, &buf_len);
 185                 update_buflen(x->iqmp, &buf_len);
 186                 }
 187
 188         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
 189         if (m == NULL)
 190                 {
 191                 RSAerr(RSA_F_RSA_PRINT,ERR_R_MALLOC_FAILURE);
 192                 goto err;
 193                 }
 194
 195         if (x->n != NULL)
 196                 mod_len = BN_num_bits(x->n);
 197
 198         if(!BIO_indent(bp,off,128))
 199                 goto err;
 200
 201         if (priv && x->d)
 202                 {
 203                 if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
 204                         <= 0) goto err;
 205                 str = "modulus:";
 206                 s = "publicExponent:";
 207                 }
 208         else
 209                 {
 210                 if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
 211                         <= 0) goto err;
 212                 str = "Modulus:";
 213                 s= "Exponent:";
 214                 }
 215         if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
 216         if (!ASN1_bn_print(bp,s,x->e,m,off))
 217                 goto err;
 218         if (priv)
 219                 {
 220                 if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
 221                         goto err;
 222                 if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
 223                         goto err;
 224                 if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
 225                         goto err;
 226                 if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
 227                         goto err;
 228                 if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
 229                         goto err;
 230                 if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
 231                         goto err;
 232                 }
 233         ret=1;
 234 err:
 235         if (m != NULL) OPENSSL_free(m);
 236         return(ret);
 237         }
 238
 239 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 240                                                         ASN1_PCTX *ctx)
 241         {
 242         return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
 243         }
 244
 245
 246 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 247                                                         ASN1_PCTX *ctx)
 248         {
 249         return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
 250         }
 251
 252 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
 253         {
 254                 {
 255                 EVP_PKEY_RSA,
 256                 EVP_PKEY_RSA,
 257                 0,
 258
 259                 rsa_pub_decode,
 260                 rsa_pub_encode,
 261                 rsa_pub_cmp,
 262                 rsa_pub_print,
 263
 264                 rsa_priv_decode,
 265                 rsa_priv_encode,
 266                 rsa_priv_print,
 267
 268                 int_rsa_size,
 269                 rsa_bits,
 270
 271                 0,0,0,0,0,0,
 272
 273                 int_rsa_free,
 274                 0
 275                 },
 276
 277                 {
 278                 EVP_PKEY_RSA2,
 279                 EVP_PKEY_RSA,
 280                 ASN1_PKEY_ALIAS
 281                 }
 282         };