mirror of
https://github.com/cuberite/polarssl.git
synced 2025-11-03 20:22:59 -05:00
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*
|
|
* RSA/SHA-1 signature verification program
|
|
*
|
|
* Copyright (C) 2006-2010, 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.
|
|
*/
|
|
|
|
#ifndef _CRT_SECURE_NO_DEPRECATE
|
|
#define _CRT_SECURE_NO_DEPRECATE 1
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
#include "polarssl/rsa.h"
|
|
#include "polarssl/sha1.h"
|
|
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
FILE *f;
|
|
int ret, i, c;
|
|
rsa_context rsa;
|
|
unsigned char hash[20];
|
|
unsigned char buf[512];
|
|
|
|
ret = 1;
|
|
if( argc != 2 )
|
|
{
|
|
printf( "usage: rsa_verify <filename>\n" );
|
|
|
|
#ifdef WIN32
|
|
printf( "\n" );
|
|
#endif
|
|
|
|
goto exit;
|
|
}
|
|
|
|
printf( "\n . Reading public key from rsa_pub.txt" );
|
|
fflush( stdout );
|
|
|
|
if( ( f = fopen( "rsa_pub.txt", "rb" ) ) == NULL )
|
|
{
|
|
printf( " failed\n ! Could not open rsa_pub.txt\n" \
|
|
" ! Please run rsa_genkey first\n\n" );
|
|
goto exit;
|
|
}
|
|
|
|
rsa_init( &rsa, RSA_PKCS_V15, 0 );
|
|
|
|
if( ( ret = mpi_read_file( &rsa.N, 16, f ) ) != 0 ||
|
|
( ret = mpi_read_file( &rsa.E, 16, f ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! mpi_read_file returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
rsa.len = ( mpi_msb( &rsa.N ) + 7 ) >> 3;
|
|
|
|
fclose( f );
|
|
|
|
/*
|
|
* Extract the RSA signature from the text file
|
|
*/
|
|
ret = 1;
|
|
i = strlen( argv[1] );
|
|
memcpy( argv[1] + i, ".sig", 5 );
|
|
|
|
if( ( f = fopen( argv[1], "rb" ) ) == NULL )
|
|
{
|
|
printf( "\n ! Could not open %s\n\n", argv[1] );
|
|
goto exit;
|
|
}
|
|
|
|
argv[1][i] = '\0', i = 0;
|
|
|
|
while( fscanf( f, "%02X", &c ) > 0 &&
|
|
i < (int) sizeof( buf ) )
|
|
buf[i++] = (unsigned char) c;
|
|
|
|
fclose( f );
|
|
|
|
if( i != rsa.len )
|
|
{
|
|
printf( "\n ! Invalid RSA signature format\n\n" );
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* 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[1], hash ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! Could not open or read %s\n\n", argv[1] );
|
|
goto exit;
|
|
}
|
|
|
|
if( ( ret = rsa_pkcs1_verify( &rsa, RSA_PUBLIC, SIG_RSA_SHA1,
|
|
20, hash, buf ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! rsa_pkcs1_verify returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf( "\n . OK (the decrypted SHA-1 hash matches)\n\n" );
|
|
|
|
ret = 0;
|
|
|
|
exit:
|
|
|
|
#ifdef WIN32
|
|
printf( " + Press Enter to exit this program.\n" );
|
|
fflush( stdout ); getchar();
|
|
#endif
|
|
|
|
return( ret );
|
|
}
|