tests/suites/test_suite_aes.function - security/mbedtls - Rivoreo Source Code Repositories

 /* BEGIN_HEADER */
 #include "mbedtls/aes.h"
 /* END_HEADER */

 /* BEGIN_DEPENDENCIES
  * depends_on:MBEDTLS_AES_C
  * END_DEPENDENCIES
  */

 /* BEGIN_CASE */
 void aes_encrypt_ecb( data_t * key_str, data_t * src_str,
                       data_t * hex_dst_string, int setkey_result )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;

     memset(output, 0x00, 100);

     mbedtls_aes_init( &ctx );

     TEST_ASSERT( mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 ) == setkey_result );
     if( setkey_result == 0 )
     {
         TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx, MBEDTLS_AES_ENCRYPT, src_str->x, output ) == 0 );

         TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );
     }

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE */
 void aes_decrypt_ecb( data_t * key_str, data_t * src_str,
                       data_t * hex_dst_string, int setkey_result )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;

     memset(output, 0x00, 100);

     mbedtls_aes_init( &ctx );

     TEST_ASSERT( mbedtls_aes_setkey_dec( &ctx, key_str->x, key_str->len * 8 ) == setkey_result );
     if( setkey_result == 0 )
     {
         TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx, MBEDTLS_AES_DECRYPT, src_str->x, output ) == 0 );

         TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );
     }

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
 void aes_encrypt_cbc( data_t * key_str, data_t * iv_str,
                       data_t * src_str, data_t * hex_dst_string,
                       int cbc_result )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;

     memset(output, 0x00, 100);

     mbedtls_aes_init( &ctx );

     mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
     TEST_ASSERT( mbedtls_aes_crypt_cbc( &ctx, MBEDTLS_AES_ENCRYPT, src_str->len, iv_str->x, src_str->x, output ) == cbc_result );
     if( cbc_result == 0 )
     {

         TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );
     }

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
 void aes_decrypt_cbc( data_t * key_str, data_t * iv_str,
                       data_t * src_str, data_t * hex_dst_string,
                       int cbc_result )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;

     memset(output, 0x00, 100);
     mbedtls_aes_init( &ctx );

     mbedtls_aes_setkey_dec( &ctx, key_str->x, key_str->len * 8 );
     TEST_ASSERT( mbedtls_aes_crypt_cbc( &ctx, MBEDTLS_AES_DECRYPT, src_str->len, iv_str->x, src_str->x, output ) == cbc_result );
     if( cbc_result == 0)
     {

         TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );
     }

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
 void aes_encrypt_xts( char *hex_key_string, char *hex_data_unit_string,
                       char *hex_src_string, char *hex_dst_string )
 {
     enum { AES_BLOCK_SIZE = 16 };
     unsigned char *data_unit = NULL;
     unsigned char *key = NULL;
     unsigned char *src = NULL;
     unsigned char *dst = NULL;
     unsigned char *output = NULL;
     mbedtls_aes_xts_context ctx;
     size_t key_len, src_len, dst_len, data_unit_len;

     mbedtls_aes_xts_init( &ctx );

     data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
     TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );

     key = unhexify_alloc( hex_key_string, &key_len );
     TEST_ASSERT( key_len % 2 == 0 );

     src = unhexify_alloc( hex_src_string, &src_len );
     dst = unhexify_alloc( hex_dst_string, &dst_len );
     TEST_ASSERT( src_len == dst_len );

     output = zero_alloc( dst_len );

     TEST_ASSERT( mbedtls_aes_xts_setkey_enc( &ctx, key, key_len * 8 ) == 0 );
     TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, src_len,
                                         data_unit, src, output ) == 0 );

     TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );

 exit:
     mbedtls_aes_xts_free( &ctx );
     mbedtls_free( data_unit );
     mbedtls_free( key );
     mbedtls_free( src );
     mbedtls_free( dst );
     mbedtls_free( output );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
 void aes_decrypt_xts( char *hex_key_string, char *hex_data_unit_string,
                       char *hex_dst_string, char *hex_src_string )
 {
     enum { AES_BLOCK_SIZE = 16 };
     unsigned char *data_unit = NULL;
     unsigned char *key = NULL;
     unsigned char *src = NULL;
     unsigned char *dst = NULL;
     unsigned char *output = NULL;
     mbedtls_aes_xts_context ctx;
     size_t key_len, src_len, dst_len, data_unit_len;

     mbedtls_aes_xts_init( &ctx );

     data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
     TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );

     key = unhexify_alloc( hex_key_string, &key_len );
     TEST_ASSERT( key_len % 2 == 0 );

     src = unhexify_alloc( hex_src_string, &src_len );
     dst = unhexify_alloc( hex_dst_string, &dst_len );
     TEST_ASSERT( src_len == dst_len );

     output = zero_alloc( dst_len );

     TEST_ASSERT( mbedtls_aes_xts_setkey_dec( &ctx, key, key_len * 8 ) == 0 );
     TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_DECRYPT, src_len,
                                         data_unit, src, output ) == 0 );

     TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );

 exit:
     mbedtls_aes_xts_free( &ctx );
     mbedtls_free( data_unit );
     mbedtls_free( key );
     mbedtls_free( src );
     mbedtls_free( dst );
     mbedtls_free( output );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
 void aes_crypt_xts_size( int size, int retval )
 {
     mbedtls_aes_xts_context ctx;
     const unsigned char *src = NULL;
     unsigned char *output = NULL;
     unsigned char data_unit[16];
     size_t length = size;

     mbedtls_aes_xts_init( &ctx );
     memset( data_unit, 0x00, sizeof( data_unit ) );


     /* Note that this function will most likely crash on failure, as NULL
      * parameters will be used. In the passing case, the length check in
      * mbedtls_aes_crypt_xts() will prevent any accesses to parameters by
      * exiting the function early. */
     TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, length, data_unit, src, output ) == retval );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
 void aes_crypt_xts_keysize( int size, int retval )
 {
     mbedtls_aes_xts_context ctx;
     const unsigned char *key = NULL;
     size_t key_len = size;

     mbedtls_aes_xts_init( &ctx );

     TEST_ASSERT( mbedtls_aes_xts_setkey_enc( &ctx, key, key_len * 8 ) == retval );
     TEST_ASSERT( mbedtls_aes_xts_setkey_dec( &ctx, key, key_len * 8 ) == retval );
 exit:
     mbedtls_aes_xts_free( &ctx );
 }
 /* END_CASE */


 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
 void aes_encrypt_cfb128( data_t * key_str, data_t * iv_str,
                          data_t * src_str, data_t * hex_dst_string )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;
     size_t iv_offset = 0;

     memset(output, 0x00, 100);
     mbedtls_aes_init( &ctx );


     mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
     TEST_ASSERT( mbedtls_aes_crypt_cfb128( &ctx, MBEDTLS_AES_ENCRYPT, 16, &iv_offset, iv_str->x, src_str->x, output ) == 0 );

     TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
 void aes_decrypt_cfb128( data_t * key_str, data_t * iv_str,
                          data_t * src_str, data_t * hex_dst_string )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;
     size_t iv_offset = 0;

     memset(output, 0x00, 100);
     mbedtls_aes_init( &ctx );


     mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
     TEST_ASSERT( mbedtls_aes_crypt_cfb128( &ctx, MBEDTLS_AES_DECRYPT, 16, &iv_offset, iv_str->x, src_str->x, output ) == 0 );

     TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
 void aes_encrypt_cfb8( data_t * key_str, data_t * iv_str,
                        data_t * src_str, data_t * hex_dst_string )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;

     memset(output, 0x00, 100);
     mbedtls_aes_init( &ctx );


     mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
     TEST_ASSERT( mbedtls_aes_crypt_cfb8( &ctx, MBEDTLS_AES_ENCRYPT, src_str->len, iv_str->x, src_str->x, output ) == 0 );

     TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
 void aes_decrypt_cfb8( data_t * key_str, data_t * iv_str,
                        data_t * src_str, data_t * hex_dst_string )
 {
     unsigned char output[100];
     mbedtls_aes_context ctx;

     memset(output, 0x00, 100);
     mbedtls_aes_init( &ctx );


     mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
     TEST_ASSERT( mbedtls_aes_crypt_cfb8( &ctx, MBEDTLS_AES_DECRYPT, src_str->len, iv_str->x, src_str->x, output ) == 0 );

     TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_OFB */
 void aes_encrypt_ofb( int fragment_size, char *hex_key_string,
                       char *hex_iv_string, char *hex_src_string,
                       char *hex_dst_string )
 {
     unsigned char key_str[32];
     unsigned char iv_str[16];
     unsigned char src_str[64];
     unsigned char dst_str[64];
     unsigned char output[32];
     mbedtls_aes_context ctx;
     size_t iv_offset = 0;
     int in_buffer_len;
     unsigned char* src_str_next;
     int key_len;

     memset( key_str, 0x00, sizeof( key_str ) );
     memset( iv_str, 0x00, sizeof( iv_str ) );
     memset( src_str, 0x00, sizeof( src_str ) );
     memset( dst_str, 0x00, sizeof( dst_str ) );
     memset( output, 0x00, sizeof( output ) );
     mbedtls_aes_init( &ctx );

     TEST_ASSERT( strlen( hex_key_string ) <= ( 32 * 2 ) );
     TEST_ASSERT( strlen( hex_iv_string ) <= ( 16 * 2 ) );
     TEST_ASSERT( strlen( hex_src_string ) <= ( 64 * 2 ) );
     TEST_ASSERT( strlen( hex_dst_string ) <= ( 64 * 2 ) );

     key_len = unhexify( key_str, hex_key_string );
     unhexify( iv_str, hex_iv_string );
     in_buffer_len = unhexify( src_str, hex_src_string );

     TEST_ASSERT( mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 ) == 0 );
     src_str_next = src_str;

     while( in_buffer_len > 0 )
     {
         TEST_ASSERT( mbedtls_aes_crypt_ofb( &ctx, fragment_size, &iv_offset,
                                             iv_str, src_str_next, output ) == 0 );

         hexify( dst_str, output, fragment_size );
         TEST_ASSERT( strncmp( (char *) dst_str, hex_dst_string,
                               ( 2 * fragment_size ) ) == 0 );

         in_buffer_len -= fragment_size;
         hex_dst_string += ( fragment_size * 2 );
         src_str_next += fragment_size;

         if( in_buffer_len < fragment_size )
             fragment_size = in_buffer_len;
     }

 exit:
     mbedtls_aes_free( &ctx );
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */
 void aes_invalid_param( )
 {
     mbedtls_aes_context dummy_ctx;
     const unsigned char key[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };

     TEST_INVALID_PARAM( mbedtls_aes_init( NULL ) );

     TEST_INVALID_PARAM( mbedtls_aes_xts_init( NULL ) );

     /* mbedtls_aes_setkey_enc() */
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
                             mbedtls_aes_setkey_enc( NULL, key, 128 ) );

     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
                             mbedtls_aes_setkey_enc( &dummy_ctx, NULL, 128 ) );

     /* mbedtls_aes_setkey_dec() */
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
                             mbedtls_aes_setkey_dec( NULL, key, 128 ) );

     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
                             mbedtls_aes_setkey_dec( &dummy_ctx, NULL, 128 ) );
 }
 /* END_CASE */

 /* BEGIN_CASE */
 void aes_valid_param( )
 {
     /* These calls accept NULL */
     TEST_VALID_PARAM( mbedtls_aes_free( NULL ) );
 #if defined(MBEDTLS_CIPHER_MODE_XTS)
     TEST_VALID_PARAM( mbedtls_aes_xts_free( NULL ) );
 #endif
 }
 /* END_CASE */

 /* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
 void aes_selftest(  )
 {
     TEST_ASSERT( mbedtls_aes_self_test( 1 ) == 0 );
 }
 /* END_CASE */
	/* BEGIN_HEADER */
	#include "mbedtls/aes.h"
	/* END_HEADER */

	/* BEGIN_DEPENDENCIES
	* depends_on:MBEDTLS_AES_C
	* END_DEPENDENCIES
	*/

	/* BEGIN_CASE */
	void aes_encrypt_ecb( data_t * key_str, data_t * src_str,
	data_t * hex_dst_string, int setkey_result )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;

	memset(output, 0x00, 100);

	mbedtls_aes_init( &ctx );

	TEST_ASSERT( mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 ) == setkey_result );
	if( setkey_result == 0 )
	{
	TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx, MBEDTLS_AES_ENCRYPT, src_str->x, output ) == 0 );

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );
	}

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE */
	void aes_decrypt_ecb( data_t * key_str, data_t * src_str,
	data_t * hex_dst_string, int setkey_result )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;

	memset(output, 0x00, 100);

	mbedtls_aes_init( &ctx );

	TEST_ASSERT( mbedtls_aes_setkey_dec( &ctx, key_str->x, key_str->len * 8 ) == setkey_result );
	if( setkey_result == 0 )
	{
	TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx, MBEDTLS_AES_DECRYPT, src_str->x, output ) == 0 );

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );
	}

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
	void aes_encrypt_cbc( data_t * key_str, data_t * iv_str,
	data_t * src_str, data_t * hex_dst_string,
	int cbc_result )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;

	memset(output, 0x00, 100);

	mbedtls_aes_init( &ctx );

	mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
	TEST_ASSERT( mbedtls_aes_crypt_cbc( &ctx, MBEDTLS_AES_ENCRYPT, src_str->len, iv_str->x, src_str->x, output ) == cbc_result );
	if( cbc_result == 0 )
	{

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );
	}

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CBC */
	void aes_decrypt_cbc( data_t * key_str, data_t * iv_str,
	data_t * src_str, data_t * hex_dst_string,
	int cbc_result )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;

	memset(output, 0x00, 100);
	mbedtls_aes_init( &ctx );

	mbedtls_aes_setkey_dec( &ctx, key_str->x, key_str->len * 8 );
	TEST_ASSERT( mbedtls_aes_crypt_cbc( &ctx, MBEDTLS_AES_DECRYPT, src_str->len, iv_str->x, src_str->x, output ) == cbc_result );
	if( cbc_result == 0)
	{

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );
	}

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
	void aes_encrypt_xts( char hex_key_string, char hex_data_unit_string,
	char hex_src_string, char hex_dst_string )
	{
	enum { AES_BLOCK_SIZE = 16 };
	unsigned char *data_unit = NULL;
	unsigned char *key = NULL;
	unsigned char *src = NULL;
	unsigned char *dst = NULL;
	unsigned char *output = NULL;
	mbedtls_aes_xts_context ctx;
	size_t key_len, src_len, dst_len, data_unit_len;

	mbedtls_aes_xts_init( &ctx );

	data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
	TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );

	key = unhexify_alloc( hex_key_string, &key_len );
	TEST_ASSERT( key_len % 2 == 0 );

	src = unhexify_alloc( hex_src_string, &src_len );
	dst = unhexify_alloc( hex_dst_string, &dst_len );
	TEST_ASSERT( src_len == dst_len );

	output = zero_alloc( dst_len );

	TEST_ASSERT( mbedtls_aes_xts_setkey_enc( &ctx, key, key_len * 8 ) == 0 );
	TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, src_len,
	data_unit, src, output ) == 0 );

	TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );

	exit:
	mbedtls_aes_xts_free( &ctx );
	mbedtls_free( data_unit );
	mbedtls_free( key );
	mbedtls_free( src );
	mbedtls_free( dst );
	mbedtls_free( output );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
	void aes_decrypt_xts( char hex_key_string, char hex_data_unit_string,
	char hex_dst_string, char hex_src_string )
	{
	enum { AES_BLOCK_SIZE = 16 };
	unsigned char *data_unit = NULL;
	unsigned char *key = NULL;
	unsigned char *src = NULL;
	unsigned char *dst = NULL;
	unsigned char *output = NULL;
	mbedtls_aes_xts_context ctx;
	size_t key_len, src_len, dst_len, data_unit_len;

	mbedtls_aes_xts_init( &ctx );

	data_unit = unhexify_alloc( hex_data_unit_string, &data_unit_len );
	TEST_ASSERT( data_unit_len == AES_BLOCK_SIZE );

	key = unhexify_alloc( hex_key_string, &key_len );
	TEST_ASSERT( key_len % 2 == 0 );

	src = unhexify_alloc( hex_src_string, &src_len );
	dst = unhexify_alloc( hex_dst_string, &dst_len );
	TEST_ASSERT( src_len == dst_len );

	output = zero_alloc( dst_len );

	TEST_ASSERT( mbedtls_aes_xts_setkey_dec( &ctx, key, key_len * 8 ) == 0 );
	TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_DECRYPT, src_len,
	data_unit, src, output ) == 0 );

	TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );

	exit:
	mbedtls_aes_xts_free( &ctx );
	mbedtls_free( data_unit );
	mbedtls_free( key );
	mbedtls_free( src );
	mbedtls_free( dst );
	mbedtls_free( output );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
	void aes_crypt_xts_size( int size, int retval )
	{
	mbedtls_aes_xts_context ctx;
	const unsigned char *src = NULL;
	unsigned char *output = NULL;
	unsigned char data_unit[16];
	size_t length = size;

	mbedtls_aes_xts_init( &ctx );
	memset( data_unit, 0x00, sizeof( data_unit ) );


	/* Note that this function will most likely crash on failure, as NULL
	* parameters will be used. In the passing case, the length check in
	* mbedtls_aes_crypt_xts() will prevent any accesses to parameters by
	* exiting the function early. */
	TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, length, data_unit, src, output ) == retval );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_XTS */
	void aes_crypt_xts_keysize( int size, int retval )
	{
	mbedtls_aes_xts_context ctx;
	const unsigned char *key = NULL;
	size_t key_len = size;

	mbedtls_aes_xts_init( &ctx );

	TEST_ASSERT( mbedtls_aes_xts_setkey_enc( &ctx, key, key_len * 8 ) == retval );
	TEST_ASSERT( mbedtls_aes_xts_setkey_dec( &ctx, key, key_len * 8 ) == retval );
	exit:
	mbedtls_aes_xts_free( &ctx );
	}
	/* END_CASE */


	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
	void aes_encrypt_cfb128( data_t * key_str, data_t * iv_str,
	data_t * src_str, data_t * hex_dst_string )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;
	size_t iv_offset = 0;

	memset(output, 0x00, 100);
	mbedtls_aes_init( &ctx );


	mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
	TEST_ASSERT( mbedtls_aes_crypt_cfb128( &ctx, MBEDTLS_AES_ENCRYPT, 16, &iv_offset, iv_str->x, src_str->x, output ) == 0 );

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
	void aes_decrypt_cfb128( data_t * key_str, data_t * iv_str,
	data_t * src_str, data_t * hex_dst_string )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;
	size_t iv_offset = 0;

	memset(output, 0x00, 100);
	mbedtls_aes_init( &ctx );


	mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
	TEST_ASSERT( mbedtls_aes_crypt_cfb128( &ctx, MBEDTLS_AES_DECRYPT, 16, &iv_offset, iv_str->x, src_str->x, output ) == 0 );

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, 16, hex_dst_string->len ) == 0 );

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
	void aes_encrypt_cfb8( data_t * key_str, data_t * iv_str,
	data_t * src_str, data_t * hex_dst_string )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;

	memset(output, 0x00, 100);
	mbedtls_aes_init( &ctx );


	mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
	TEST_ASSERT( mbedtls_aes_crypt_cfb8( &ctx, MBEDTLS_AES_ENCRYPT, src_str->len, iv_str->x, src_str->x, output ) == 0 );

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_CFB */
	void aes_decrypt_cfb8( data_t * key_str, data_t * iv_str,
	data_t * src_str, data_t * hex_dst_string )
	{
	unsigned char output[100];
	mbedtls_aes_context ctx;

	memset(output, 0x00, 100);
	mbedtls_aes_init( &ctx );


	mbedtls_aes_setkey_enc( &ctx, key_str->x, key_str->len * 8 );
	TEST_ASSERT( mbedtls_aes_crypt_cfb8( &ctx, MBEDTLS_AES_DECRYPT, src_str->len, iv_str->x, src_str->x, output ) == 0 );

	TEST_ASSERT( hexcmp( output, hex_dst_string->x, src_str->len, hex_dst_string->len ) == 0 );

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_OFB */
	void aes_encrypt_ofb( int fragment_size, char *hex_key_string,
	char hex_iv_string, char hex_src_string,
	char *hex_dst_string )
	{
	unsigned char key_str[32];
	unsigned char iv_str[16];
	unsigned char src_str[64];
	unsigned char dst_str[64];
	unsigned char output[32];
	mbedtls_aes_context ctx;
	size_t iv_offset = 0;
	int in_buffer_len;
	unsigned char* src_str_next;
	int key_len;

	memset( key_str, 0x00, sizeof( key_str ) );
	memset( iv_str, 0x00, sizeof( iv_str ) );
	memset( src_str, 0x00, sizeof( src_str ) );
	memset( dst_str, 0x00, sizeof( dst_str ) );
	memset( output, 0x00, sizeof( output ) );
	mbedtls_aes_init( &ctx );

	TEST_ASSERT( strlen( hex_key_string ) <= ( 32 * 2 ) );
	TEST_ASSERT( strlen( hex_iv_string ) <= ( 16 * 2 ) );
	TEST_ASSERT( strlen( hex_src_string ) <= ( 64 * 2 ) );
	TEST_ASSERT( strlen( hex_dst_string ) <= ( 64 * 2 ) );

	key_len = unhexify( key_str, hex_key_string );
	unhexify( iv_str, hex_iv_string );
	in_buffer_len = unhexify( src_str, hex_src_string );

	TEST_ASSERT( mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 ) == 0 );
	src_str_next = src_str;

	while( in_buffer_len > 0 )
	{
	TEST_ASSERT( mbedtls_aes_crypt_ofb( &ctx, fragment_size, &iv_offset,
	iv_str, src_str_next, output ) == 0 );

	hexify( dst_str, output, fragment_size );
	TEST_ASSERT( strncmp( (char *) dst_str, hex_dst_string,
	( 2 * fragment_size ) ) == 0 );

	in_buffer_len -= fragment_size;
	hex_dst_string += ( fragment_size * 2 );
	src_str_next += fragment_size;

	if( in_buffer_len < fragment_size )
	fragment_size = in_buffer_len;
	}

	exit:
	mbedtls_aes_free( &ctx );
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */
	void aes_invalid_param( )
	{
	mbedtls_aes_context dummy_ctx;
	const unsigned char key[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };

	TEST_INVALID_PARAM( mbedtls_aes_init( NULL ) );

	TEST_INVALID_PARAM( mbedtls_aes_xts_init( NULL ) );

	/* mbedtls_aes_setkey_enc() */
	TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
	mbedtls_aes_setkey_enc( NULL, key, 128 ) );

	TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
	mbedtls_aes_setkey_enc( &dummy_ctx, NULL, 128 ) );

	/* mbedtls_aes_setkey_dec() */
	TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
	mbedtls_aes_setkey_dec( NULL, key, 128 ) );

	TEST_INVALID_PARAM_RET( MBEDTLS_ERR_AES_BAD_INPUT_DATA,
	mbedtls_aes_setkey_dec( &dummy_ctx, NULL, 128 ) );
	}
	/* END_CASE */

	/* BEGIN_CASE */
	void aes_valid_param( )
	{
	/* These calls accept NULL */
	TEST_VALID_PARAM( mbedtls_aes_free( NULL ) );
	#if defined(MBEDTLS_CIPHER_MODE_XTS)
	TEST_VALID_PARAM( mbedtls_aes_xts_free( NULL ) );
	#endif
	}
	/* END_CASE */

	/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
	void aes_selftest( )
	{
	TEST_ASSERT( mbedtls_aes_self_test( 1 ) == 0 );
	}
	/* END_CASE */