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	int mcrypt_module_is_block_algorithm(char *algorithm,
					     char *a_directory);
	int mcrypt_module_is_block_algorithm_mode(char *mode,
						  char *m_directory);
	int mcrypt_module_is_block_mode(char *mode, char *m_directory);

	int mcrypt_module_get_algo_key_size(char *algorithm,
					    char *a_directory);
	int mcrypt_module_get_algo_block_size(char *algorithm,
					      char *a_directory);

	int *mcrypt_module_get_algo_supported_key_sizes(char *algorithm,
							char *a_directory,
							int *len);

	/* Checks the version of the specified module 
	 */
	int mcrypt_module_algorithm_version(char *algorithm,
					    char *a_directory);
	int mcrypt_module_mode_version(char *mode, char *a_directory);


	/* for multithreaded applications: 
	 */
	int mcrypt_mutex_register ( void (*mutex_lock)(void) , 
			void (*mutex_unlock)(void), 
			void (*set_error)(const char*), 
			const char* (*get_error)(void));

	const char *
		mcrypt_check_version( const char *);

	/* These definitions exist in order to ease the access to 
	 * mcrypt_module_init().
	 */

	/* Algorithms */
#define MCRYPT_BLOWFISH		"blowfish"
#define MCRYPT_DES 		"des"
#define MCRYPT_3DES 		"tripledes"
#define MCRYPT_3WAY 		"threeway"
#define MCRYPT_GOST 		"gost"
#define MCRYPT_SAFER_SK64 	"safer-sk64"
#define MCRYPT_SAFER_SK128 	"safer-sk128"
#define MCRYPT_CAST_128 	"cast-128"
#define MCRYPT_XTEA 		"xtea"
#define MCRYPT_RC2	 	"rc2"
#define MCRYPT_TWOFISH 		"twofish"
#define MCRYPT_CAST_256 	"cast-256"
#define MCRYPT_SAFERPLUS 	"saferplus"
#define MCRYPT_LOKI97 		"loki97"
#define MCRYPT_SERPENT 		"serpent"
#define MCRYPT_RIJNDAEL_128 	"rijndael-128"
#define MCRYPT_RIJNDAEL_192 	"rijndael-192"
#define MCRYPT_RIJNDAEL_256 	"rijndael-256"
#define MCRYPT_ENIGMA 		"enigma"
#define MCRYPT_ARCFOUR		"arcfour"
#define MCRYPT_WAKE		"wake"

	/* Modes */
#define MCRYPT_CBC		"cbc"
#define MCRYPT_ECB		"ecb"
#define MCRYPT_CFB		"cfb"
#define MCRYPT_OFB		"ofb"
#define MCRYPT_nOFB		"nofb"
#define MCRYPT_STREAM		"stream"
#define MCRYPT_CTR              "ctr"
#define MCRYPT_nCFB             "ncfb"

#ifdef __cplusplus
}
#endif