diff --git a/openaes/test/vt_aes.c b/openaes/test/vt_aes.c
new file mode 100644
index 0000000..1ba755e
--- /dev/null
+++ b/openaes/test/vt_aes.c
@@ -0,0 +1,405 @@
+/* 
+ * ---------------------------------------------------------------------------
+ * OpenAES License
+ * ---------------------------------------------------------------------------
+ * Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ *   - Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * ---------------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define OAES_DEBUG 1
+#include "oaes_lib.h"
+
+static int _is_step = 1;
+
+static int step_cb(
+		const uint8_t state[OAES_BLOCK_SIZE],
+		const char * step_name,
+		int step_count,
+		void * user_data )
+{
+	size_t _buf_len;
+	char * _buf;
+
+
+	if( NULL == state )
+		return 1;
+
+	oaes_sprintf( NULL, &_buf_len, state, OAES_BLOCK_SIZE );
+	_buf = (char *) calloc( _buf_len, sizeof( char ) );
+
+	if( _buf )
+	{
+		oaes_sprintf( _buf, &_buf_len, state, OAES_BLOCK_SIZE );
+		printf( "round[%2d].%-7s --> %s", step_count, step_name, _buf );
+		free( _buf );
+	}
+	
+	if( 1 == _is_step && '\n' != getchar( ) )
+		_is_step = 0;
+
+	return 0;
+}
+
+static int to_binary(uint8_t * buf, size_t * buf_len, const char * data)
+{
+	size_t _i, _buf_len_in;
+	
+	if( NULL == buf_len )
+		return 1;
+
+	if( NULL == data )
+		return 1;
+
+	_buf_len_in = *buf_len;
+	*buf_len = strlen( data ) / 2;
+	
+	if( NULL == buf )
+		return 0;
+
+	if( *buf_len > _buf_len_in )
+		return 1;
+
+	memset( buf, 0, strlen( data ) / 2 );
+	
+	// lookup ascii table
+	for( _i = 0; _i < strlen( data ); _i++ )
+	{
+		// 0-9
+		if( data[_i] >= 0x30 && data[_i] <= 0x39 )
+			buf[_i / 2] += ( data[_i] - 0x30 ) << ( 4 * ( ( _i + 1 ) % 2 ) ) ;
+		// a-f
+		else if( data[_i] >= 0x41 && data[_i] <= 0x46 )
+			buf[_i / 2] += ( data[_i] - 0x37 ) << ( 4 * ( ( _i + 1 ) % 2 ) );
+		// A-F
+		else if( data[_i] >= 0x61 && data[_i] <= 0x66 )
+			buf[_i / 2] += ( data[_i] - 0x57 ) << ( 4 * ( ( _i + 1 ) % 2 ) );
+		// invalid character
+		else
+			return 1;
+	}
+	
+	return 0;
+}
+
+static void usage(const char * exe_name)
+{
+	if( NULL == exe_name )
+		return;
+	
+	printf(
+			"Usage:\n"
+			"  %s [-step] [-ecb] [[-key < 128 | 192 | 256 | key_data >] [-bin] <text>\n",
+			exe_name
+	);
+}
+
+int main(int argc, char** argv)
+{
+	size_t _i;
+	OAES_CTX * ctx = NULL;
+	uint8_t *_encbuf, *_decbuf, *_key_data = NULL, *_bin_data = NULL;
+	size_t _encbuf_len, _decbuf_len, _buf_len;
+	size_t _key_data_len = 0, _bin_data_len = 0;
+	char *_buf;
+	short _is_ecb = 0, _is_bin = 0;
+	char * _text = NULL, * _key_text = NULL;
+	int _key_len = 128;
+	
+	if( argc < 2 )
+	{
+		usage( argv[0] );
+		return EXIT_FAILURE;
+	}
+
+	for( _i = 1; _i < argc; _i++ )
+	{
+		int _found = 0;
+
+		if( 0 == strcmp( argv[_i], "-nostep" ) )
+		{
+			_found = 1;
+			_is_step = 0;
+		}
+
+		if( 0 == strcmp( argv[_i], "-ecb" ) )
+		{
+			_found = 1;
+			_is_ecb = 1;
+		}
+		
+		if( 0 == strcmp( argv[_i], "-bin" ) )
+		{
+			_found = 1;
+			_is_bin = 1;
+		}
+		
+		if( 0 == strcmp( argv[_i], "-key" ) )
+		{
+			_found = 1;
+			_i++; // len
+			if( _i >= argc )
+			{
+				printf("Error: No value specified for '-%s'.\n",
+						"key");
+				usage( argv[0] );
+				return EXIT_FAILURE;
+			}
+			_key_len = atoi( argv[_i] );
+			switch( _key_len )
+			{
+				case 128:
+				case 192:
+				case 256:
+					break;
+				default:
+					_key_text = argv[_i];
+					if( to_binary( NULL, &_key_data_len, _key_text ) )
+					{
+						printf( "Error: Invalid value [%s] specified for '-%s'.\n",
+								argv[_i], "key" );
+						return EXIT_FAILURE;
+					}
+					switch( _key_data_len )
+					{
+						case 16:
+						case 24:
+						case 32:
+							break;
+						default:
+							printf("Error: key_data [%s] specified for '-%s' has an invalid "
+									"size.\n", argv[_i], "key");
+							usage( argv[0] );
+							return EXIT_FAILURE;
+					}
+			}
+		}
+		
+		if( 0 == _found )
+		{
+			if( _text )
+			{
+				printf("Error: Invalid option '%s'.\n", argv[_i]);
+				usage( argv[0] );
+				return EXIT_FAILURE;
+			}
+			else
+			{
+				_text = argv[_i];
+				if( _is_bin && to_binary( NULL, &_bin_data_len, _text ) )
+				{
+					printf( "Error: Invalid value [%s] specified for '-%s'.\n",
+							argv[_i], "bin" );
+					return EXIT_FAILURE;
+				}
+			}
+		}			
+	}
+
+	if( NULL == _text )
+	{
+		usage( argv[0] );
+		return EXIT_FAILURE;
+	}
+
+	if( _is_step )
+		printf( "\nEnabling step mode, press Return to step.\n\n" );
+
+	if( _is_bin )
+	{
+		_bin_data = (uint8_t *) calloc(_bin_data_len, sizeof(uint8_t));
+		if( NULL == _bin_data )
+		{
+			printf( "Error: Failed to allocate memory.\n" );
+			return EXIT_FAILURE;
+		}
+		if( to_binary( _bin_data, &_bin_data_len, _text ) )
+		{
+			printf( "Error: Could not load data [%s].\n", _text);
+			free( _bin_data );
+			return EXIT_FAILURE;
+		}
+	}
+	else
+	{
+		oaes_sprintf( NULL, &_buf_len, (const uint8_t *)_text, strlen(_text));
+		_buf = (char *) calloc(_buf_len, sizeof(char));
+		printf( "\n***** plaintext  *****\n" );
+		if( _buf )
+		{
+			oaes_sprintf( _buf, &_buf_len,
+					(const uint8_t *)_text, strlen( _text ) );
+			printf( "%s", _buf );
+		}
+		printf( "\n**********************\n" );
+		free( _buf );
+	}
+	
+	ctx = oaes_alloc();
+	if( NULL == ctx )
+	{
+		printf("Error: Failed to initialize OAES.\n");
+		if( _bin_data )
+			free( _bin_data );
+		return EXIT_FAILURE;
+	}
+	if( OAES_RET_SUCCESS != oaes_set_option( ctx, OAES_OPTION_STEP_ON, step_cb ) )
+		printf("Error: Failed to set OAES options.\n");
+	if( _is_ecb )
+		if( OAES_RET_SUCCESS != oaes_set_option( ctx, OAES_OPTION_ECB, NULL ) )
+			printf("Error: Failed to set OAES options.\n");
+
+	if( _key_text )
+	{
+		_key_data = (uint8_t *) calloc(_key_data_len, sizeof(uint8_t));
+		if( NULL == _key_data )
+		{
+			printf( "Error: Failed to allocate memory.\n" );
+			if( _bin_data )
+				free( _bin_data );
+			return EXIT_FAILURE;
+		}
+		if( to_binary( _key_data, &_key_data_len, _key_text ) )
+		{
+			printf( "Error: Could not load key [%s].\n", _key_text);
+			free( _key_data );
+			return EXIT_FAILURE;
+		}
+		oaes_key_import_data( ctx, _key_data, _key_data_len );
+	}
+	else
+		switch( _key_len )
+		{
+			case 128:
+				if( OAES_RET_SUCCESS != oaes_key_gen_128(ctx) )
+					printf("Error: Failed to generate OAES %d bit key.\n", _key_len);
+				break;
+			case 192:
+				if( OAES_RET_SUCCESS != oaes_key_gen_192(ctx) )
+					printf("Error: Failed to generate OAES %d bit key.\n", _key_len);
+				break;
+			case 256:
+				if( OAES_RET_SUCCESS != oaes_key_gen_256(ctx) )
+					printf("Error: Failed to generate OAES %d bit key.\n", _key_len);
+				break;
+			default:
+				break;
+		}
+
+	if( _bin_data )
+	{
+		if( OAES_RET_SUCCESS != oaes_encrypt( ctx,
+				_bin_data, _bin_data_len, NULL, &_encbuf_len ) )
+			printf("Error: Failed to retrieve required buffer size for encryption.\n");
+		_encbuf = (uint8_t *) calloc(_encbuf_len, sizeof(uint8_t));
+		if( NULL == _encbuf )
+		{
+			printf( "Error: Failed to allocate memory.\n" );
+			if( _key_data )
+				free( _key_data );
+			free( _bin_data );
+			return EXIT_FAILURE;
+		}
+		printf( "\n" );
+		if( OAES_RET_SUCCESS != oaes_encrypt( ctx,
+				_bin_data, _bin_data_len, _encbuf, &_encbuf_len ) )
+			printf("Error: Encryption failed.\n");
+		printf( "\n**********************\n\n" );
+	}
+	else
+	{
+		if( OAES_RET_SUCCESS != oaes_encrypt( ctx,
+				(const uint8_t *)_text, strlen( _text ), NULL, &_encbuf_len ) )
+			printf("Error: Failed to retrieve required buffer size for encryption.\n");
+		_encbuf = (uint8_t *) calloc(_encbuf_len, sizeof(uint8_t));
+		if( NULL == _encbuf )
+		{
+			printf( "Error: Failed to allocate memory.\n" );
+			if( _key_data )
+				free( _key_data );
+			return EXIT_FAILURE;
+		}
+		printf( "\n" );
+		if( OAES_RET_SUCCESS != oaes_encrypt( ctx,
+				(const uint8_t *)_text, strlen( _text ), _encbuf, &_encbuf_len ) )
+			printf("Error: Encryption failed.\n");
+		printf( "\n**********************\n\n" );
+	}
+
+	if( OAES_RET_SUCCESS != oaes_decrypt( ctx,
+			_encbuf, _encbuf_len, NULL, &_decbuf_len ) )
+		printf("Error: Failed to retrieve required buffer size for encryption.\n");
+	_decbuf = (uint8_t *) calloc(_decbuf_len, sizeof(uint8_t));
+	if( NULL == _decbuf )
+	{
+		printf( "Error: Failed to allocate memory.\n" );
+		if( _key_data )
+			free( _key_data );
+		if( _bin_data )
+			free( _bin_data );
+		free( _encbuf );
+		return EXIT_FAILURE;
+	}
+	if( OAES_RET_SUCCESS != oaes_decrypt( ctx,
+			_encbuf, _encbuf_len, _decbuf, &_decbuf_len ) )
+		printf("Error: Decryption failed.\n");
+
+	if( OAES_RET_SUCCESS !=  oaes_free( &ctx ) )
+		printf("Error: Failed to uninitialize OAES.\n");
+	
+	oaes_sprintf( NULL, &_buf_len, _encbuf, _encbuf_len );
+	_buf = (char *) calloc(_buf_len, sizeof(char));
+	printf( "\n***** cyphertext *****\n" );
+	if( _buf )
+	{
+		oaes_sprintf( _buf, &_buf_len, _encbuf, _encbuf_len );
+		printf( "%s", _buf );
+	}
+	printf( "\n**********************\n" );
+	free( _buf );
+	
+	oaes_sprintf( NULL, &_buf_len, _decbuf, _decbuf_len );
+	_buf = (char *) calloc(_buf_len, sizeof(char));
+	printf( "\n***** plaintext  *****\n" );
+	if( _buf )
+	{
+		oaes_sprintf( _buf, &_buf_len, _decbuf, _decbuf_len );
+		printf( "%s", _buf );
+	}
+	printf( "\n**********************\n\n" );
+	free( _buf );
+	
+	free( _encbuf );
+	free( _decbuf );
+	if( _key_data )
+		free( _key_data );
+	if( _bin_data )
+		free( _bin_data );
+
+	return (EXIT_SUCCESS);
+}