crypto/rsa/rsa_lib.c

   1 /* crypto/rsa/rsa_lib.c */
   2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include "bn.h"
  62 #include "rsa.h"
  63
  64 char *RSA_version="RSA part of SSLeay 0.8.1b 29-Jun-1998";
  65
  66 static RSA_METHOD *default_RSA_meth=NULL;
  67
  68 RSA *RSA_new()
  69         {
  70         return(RSA_new_method(NULL));
  71         }
  72
  73 void RSA_set_default_method(meth)
  74 RSA_METHOD *meth;
  75         {
  76         default_RSA_meth=meth;
  77         }
  78
  79 RSA *RSA_new_method(meth)
  80 RSA_METHOD *meth;
  81         {
  82         RSA *ret;
  83
  84         if (default_RSA_meth == NULL)
  85                 {
  86 #ifdef RSAref
  87                 default_RSA_meth=RSA_PKCS1_RSAref();
  88 #else
  89                 default_RSA_meth=RSA_PKCS1_SSLeay();
  90 #endif
  91                 }
  92         ret=(RSA *)Malloc(sizeof(RSA));
  93         if (ret == NULL)
  94                 {
  95                 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
  96                 return(NULL);
  97                 }
  98
  99         if (meth == NULL)
 100                 ret->meth=default_RSA_meth;
 101         else
 102                 ret->meth=meth;
 103
 104         ret->pad=0;
 105         ret->version=0;
 106         ret->n=NULL;
 107         ret->e=NULL;
 108         ret->d=NULL;
 109         ret->p=NULL;
 110         ret->q=NULL;
 111         ret->dmp1=NULL;
 112         ret->dmq1=NULL;
 113         ret->iqmp=NULL;
 114         ret->references=1;
 115         ret->app_data=NULL;
 116         if ((ret->meth->init != NULL) && !ret->meth->init(ret))
 117                 {
 118                 Free(ret);
 119                 ret=NULL;
 120                 }
 121         return(ret);
 122         }
 123
 124 void RSA_free(r)
 125 RSA *r;
 126         {
 127         int i;
 128
 129         if (r == NULL) return;
 130
 131         i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
 132         if (i > 0) return;
 133 #ifdef REF_CHECK
 134         if (i < 0)
 135                 {
 136                 fprintf(stderr,"RSA_free, bad reference count\n");
 137                 abort();
 138                 }
 139 #endif
 140
 141         if (r->meth->finish != NULL)
 142                 r->meth->finish(r);
 143
 144         if (r->n != NULL) BN_clear_free(r->n);
 145         if (r->e != NULL) BN_clear_free(r->e);
 146         if (r->d != NULL) BN_clear_free(r->d);
 147         if (r->p != NULL) BN_clear_free(r->p);
 148         if (r->q != NULL) BN_clear_free(r->q);
 149         if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
 150         if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
 151         if (r->iqmp != NULL) BN_clear_free(r->iqmp);
 152         Free(r);
 153         }
 154
 155 int RSA_size(r)
 156 RSA *r;
 157         {
 158         return(BN_num_bytes(r->n));
 159         }
 160
 161 int RSA_public_encrypt(flen, from, to, rsa, padding)
 162 int flen;
 163 unsigned char *from;
 164 unsigned char *to;
 165 RSA *rsa;
 166 int padding;
 167         {
 168         return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
 169         }
 170
 171 int RSA_private_encrypt(flen, from, to, rsa, padding)
 172 int flen;
 173 unsigned char *from;
 174 unsigned char *to;
 175 RSA *rsa;
 176 int padding;
 177         {
 178         return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
 179         }
 180
 181 int RSA_private_decrypt(flen, from, to, rsa, padding)
 182 int flen;
 183 unsigned char *from;
 184 unsigned char *to;
 185 RSA *rsa;
 186 int padding;
 187         {
 188         return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
 189         }
 190
 191 int RSA_public_decrypt(flen, from, to, rsa, padding)
 192 int flen;
 193 unsigned char *from;
 194 unsigned char *to;
 195 RSA *rsa;
 196 int padding;
 197         {
 198         return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
 199         }
 200