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