AppleCSP/open_ssl/rsa/rsa_saos.c

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /* crypto/rsa/rsa_saos.c */
  20 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  21  * All rights reserved.
  22  *
  23  * This package is an SSL implementation written
  24  * by Eric Young (eay@cryptsoft.com).
  25  * The implementation was written so as to conform with Netscapes SSL.
  26  *
  27  * This library is free for commercial and non-commercial use as long as
  28  * the following conditions are aheared to.  The following conditions
  29  * apply to all code found in this distribution, be it the RC4, RSA,
  30  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  31  * included with this distribution is covered by the same copyright terms
  32  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  33  *
  34  * Copyright remains Eric Young's, and as such any Copyright notices in
  35  * the code are not to be removed.
  36  * If this package is used in a product, Eric Young should be given attribution
  37  * as the author of the parts of the library used.
  38  * This can be in the form of a textual message at program startup or
  39  * in documentation (online or textual) provided with the package.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *    "This product includes cryptographic software written by
  52  *     Eric Young (eay@cryptsoft.com)"
  53  *    The word 'cryptographic' can be left out if the rouines from the library
  54  *    being used are not cryptographic related :-).
  55  * 4. If you include any Windows specific code (or a derivative thereof) from
  56  *    the apps directory (application code) you must include an acknowledgement:
  57  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  * The licence and distribution terms for any publically available version or
  72  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  73  * copied and put under another distribution licence
  74  * [including the GNU Public Licence.]
  75  */
  76
  77 #include <stdio.h>
  78 #include "cryptlib.h"
  79 #include <openssl/bn.h>
  80 #include <openssl/rsa.h>
  81 #include <openssl/objects.h>
  82 #include <openssl/x509.h>
  83
  84 int RSA_sign_ASN1_OCTET_STRING(int type, unsigned char *m, unsigned int m_len,
  85              unsigned char *sigret, unsigned int *siglen, RSA *rsa)
  86         {
  87         ASN1_OCTET_STRING sig;
  88         int i,j,ret=1;
  89         unsigned char *p,*s;
  90
  91         sig.type=V_ASN1_OCTET_STRING;
  92         sig.length=m_len;
  93         sig.data=m;
  94
  95         i=i2d_ASN1_OCTET_STRING(&sig,NULL);
  96         j=RSA_size(rsa);
  97         if ((i-RSA_PKCS1_PADDING) > j)
  98                 {
  99                 RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
 100                 return(0);
 101                 }
 102         s=(unsigned char *)Malloc((unsigned int)j+1);
 103         if (s == NULL)
 104                 {
 105                 RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE);
 106                 return(0);
 107                 }
 108         p=s;
 109         i2d_ASN1_OCTET_STRING(&sig,&p);
 110         i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING);
 111         if (i <= 0)
 112                 ret=0;
 113         else
 114                 *siglen=i;
 115
 116         memset(s,0,(unsigned int)j+1);
 117         Free(s);
 118         return(ret);
 119         }
 120
 121 int RSA_verify_ASN1_OCTET_STRING(int dtype, unsigned char *m,
 122              unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
 123              RSA *rsa)
 124         {
 125         int i,ret=0;
 126         unsigned char *p,*s;
 127         ASN1_OCTET_STRING *sig=NULL;
 128
 129         if (siglen != (unsigned int)RSA_size(rsa))
 130                 {
 131                 RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_WRONG_SIGNATURE_LENGTH);
 132                 return(0);
 133                 }
 134
 135         s=(unsigned char *)Malloc((unsigned int)siglen);
 136         if (s == NULL)
 137                 {
 138                 RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE);
 139                 goto err;
 140                 }
 141         i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
 142
 143         if (i <= 0) goto err;
 144
 145         p=s;
 146         sig=d2i_ASN1_OCTET_STRING(NULL,&p,(long)i);
 147         if (sig == NULL) goto err;
 148
 149         if (    ((unsigned int)sig->length != m_len) ||
 150                 (memcmp(m,sig->data,m_len) != 0))
 151                 {
 152                 RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_BAD_SIGNATURE);
 153                 }
 154         else
 155                 ret=1;
 156 err:
 157         if (sig != NULL) M_ASN1_OCTET_STRING_free(sig);
 158         memset(s,0,(unsigned int)siglen);
 159         Free(s);
 160         return(ret);
 161         }
 162