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 */