149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/*
|
|
* RSASSA-PSS/SHA-1 signature verification program
|
|
*
|
|
* Copyright (C) 2006-2011, Brainspark B.V.
|
|
*
|
|
* This file is part of PolarSSL (http://www.polarssl.org)
|
|
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "polarssl/config.h"
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
#include "polarssl/md.h"
|
|
#include "polarssl/pem.h"
|
|
#include "polarssl/pk.h"
|
|
#include "polarssl/sha1.h"
|
|
#include "polarssl/x509.h"
|
|
|
|
#if defined _MSC_VER && !defined snprintf
|
|
#define snprintf _snprintf
|
|
#endif
|
|
|
|
#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) || \
|
|
!defined(POLARSSL_SHA1_C) || !defined(POLARSSL_PK_PARSE_C) || \
|
|
!defined(POLARSSL_FS_IO)
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
((void) argc);
|
|
((void) argv);
|
|
|
|
printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
|
|
"POLARSSL_SHA1_C and/or POLARSSL_PK_PARSE_C and/or "
|
|
"POLARSSL_FS_IO not defined.\n");
|
|
return( 0 );
|
|
}
|
|
#else
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
FILE *f;
|
|
int ret = 1;
|
|
size_t i;
|
|
pk_context pk;
|
|
unsigned char hash[20];
|
|
unsigned char buf[POLARSSL_MPI_MAX_SIZE];
|
|
char filename[512];
|
|
|
|
pk_init( &pk );
|
|
|
|
if( argc != 3 )
|
|
{
|
|
printf( "usage: rsa_verify_pss <key_file> <filename>\n" );
|
|
|
|
#if defined(_WIN32)
|
|
printf( "\n" );
|
|
#endif
|
|
|
|
goto exit;
|
|
}
|
|
|
|
printf( "\n . Reading public key from '%s'", argv[1] );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! Could not read key from '%s'\n", argv[1] );
|
|
printf( " ! pk_parse_public_keyfile returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
if( !pk_can_do( &pk, POLARSSL_PK_RSA ) )
|
|
{
|
|
ret = 1;
|
|
printf( " failed\n ! Key is not an RSA key\n" );
|
|
goto exit;
|
|
}
|
|
|
|
rsa_set_padding( pk_rsa( pk ), RSA_PKCS_V21, POLARSSL_MD_SHA1 );
|
|
|
|
/*
|
|
* Extract the RSA signature from the text file
|
|
*/
|
|
ret = 1;
|
|
snprintf( filename, 512, "%s.sig", argv[2] );
|
|
|
|
if( ( f = fopen( filename, "rb" ) ) == NULL )
|
|
{
|
|
printf( "\n ! Could not open %s\n\n", filename );
|
|
goto exit;
|
|
}
|
|
|
|
|
|
i = fread( buf, 1, POLARSSL_MPI_MAX_SIZE, f );
|
|
|
|
fclose( f );
|
|
|
|
/*
|
|
* Compute the SHA-1 hash of the input file and compare
|
|
* it with the hash decrypted from the RSA signature.
|
|
*/
|
|
printf( "\n . Verifying the RSA/SHA-1 signature" );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = sha1_file( argv[2], hash ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
|
|
goto exit;
|
|
}
|
|
|
|
if( ( ret = pk_verify( &pk, POLARSSL_MD_SHA1, hash, 0,
|
|
buf, i ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! pk_verify returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf( "\n . OK (the decrypted SHA-1 hash matches)\n\n" );
|
|
|
|
ret = 0;
|
|
|
|
exit:
|
|
pk_free( &pk );
|
|
|
|
#if defined(_WIN32)
|
|
printf( " + Press Enter to exit this program.\n" );
|
|
fflush( stdout ); getchar();
|
|
#endif
|
|
|
|
return( ret );
|
|
}
|
|
#endif /* POLARSSL_BIGNUM_C && POLARSSL_RSA_C && POLARSSL_SHA1_C &&
|
|
POLARSSL_PK_PARSE_C && POLARSSL_FS_IO */
|