#include <openssl/des.h>

#define NS_DES_ENCRYPT 1
#define NS_DES_DECRYPT 2

/**
 * Encrypts given data using the DES algorithm
 * @param mode mode of operation (see NS_DES_ENCRYPT, NS_DES_DECRYPT)
 * @param input input of encryption, always consists of 8 bytes data
 * @param output output of encryption, always consists of 8 bytes data
 * @param key null-terminated key for encryption
 */
void netsec_des_crypt(int mode, const_DES_cblock *input, DES_cblock *output, char *key);