- Added rsa_encrypt and rsa_decrypt example programs
diff --git a/programs/pkey/rsa_encrypt.c b/programs/pkey/rsa_encrypt.c
new file mode 100644
index 0000000..71d7ea8
--- /dev/null
+++ b/programs/pkey/rsa_encrypt.c
@@ -0,0 +1,150 @@
+/*
+ * RSA simple data encryption 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/config.h"
+
+#include "polarssl/rsa.h"
+#include "polarssl/havege.h"
+
+#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) || \
+ !defined(POLARSSL_HAVEGE_C) || !defined(POLARSSL_FS_IO)
+int main( void )
+{
+ printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
+ "POLARSSL_HAVEGE_C and/or POLARSSL_FS_IO not defined.\n");
+ return( 0 );
+}
+#else
+int main( int argc, char *argv[] )
+{
+ FILE *f;
+ int ret;
+ size_t i;
+ rsa_context rsa;
+ havege_state hs;
+ unsigned char input[1024];
+ unsigned char buf[512];
+
+ havege_init( &hs );
+
+ ret = 1;
+
+ if( argc != 2 )
+ {
+ printf( "usage: rsa_encrypt <string of max 100 characters>\n" );
+
+#ifdef WIN32
+ printf( "\n" );
+#endif
+
+ goto exit;
+ }
+
+ printf( "\n . Reading private key from rsa_priv.txt" );
+ fflush( stdout );
+
+ if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
+ {
+ ret = 1;
+ printf( " failed\n ! Could not open rsa_priv.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 ||
+ ( ret = mpi_read_file( &rsa.D , 16, f ) ) != 0 ||
+ ( ret = mpi_read_file( &rsa.P , 16, f ) ) != 0 ||
+ ( ret = mpi_read_file( &rsa.Q , 16, f ) ) != 0 ||
+ ( ret = mpi_read_file( &rsa.DP, 16, f ) ) != 0 ||
+ ( ret = mpi_read_file( &rsa.DQ, 16, f ) ) != 0 ||
+ ( ret = mpi_read_file( &rsa.QP, 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 );
+
+ if( strlen( argv[1] ) > 100 )
+ {
+ printf( " Input data larger than 100 characters.\n\n" );
+ goto exit;
+ }
+
+ memcpy( input, argv[1], strlen( argv[1] ) );
+
+ /*
+ * Calculate the RSA encryption of the hash.
+ */
+ printf( "\n . Generating the RSA encrypted value" );
+ fflush( stdout );
+
+ if( ( ret = rsa_pkcs1_encrypt( &rsa, havege_rand, &hs, RSA_PRIVATE, strlen( argv[1] ), input, buf ) ) != 0 )
+ {
+ printf( " failed\n ! rsa_pkcs1_encrypt returned %d\n\n", ret );
+ goto exit;
+ }
+
+ /*
+ * Write the signature into result-enc.txt
+ */
+ if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
+ {
+ ret = 1;
+ printf( " failed\n ! Could not create %s\n\n", "result-enc.txt" );
+ goto exit;
+ }
+
+ for( i = 0; i < rsa.len; i++ )
+ fprintf( f, "%02X%s", buf[i],
+ ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
+
+ fclose( f );
+
+ printf( "\n . Done (created \"%s\")\n\n", "result-enc.txt" );
+
+exit:
+
+#ifdef WIN32
+ printf( " + Press Enter to exit this program.\n" );
+ fflush( stdout ); getchar();
+#endif
+
+ return( ret );
+}
+#endif /* POLARSSL_BIGNUM_C && POLARSSL_RSA_C && POLARSSL_HAVEGE_C &&
+ POLARSSL_FS_IO */