des.h

#ifndef DES_H
#define DES_H

#define DES_KEY_SIZE 8 // 56 bits used, but must supply 64 (8 are ignored)

void des_encrypt( const unsigned char *plaintext, 
         const int plaintext_len,
         unsigned char *ciphertext, 
         void *iv, 
         const unsigned char *key );
void des3_encrypt( const unsigned char *plaintext, 
         const int plaintext_len,
         unsigned char *ciphertext, 
         void *iv, 
         const unsigned char *key );
void des_decrypt( const unsigned char *ciphertext, 
         const int ciphertext_len,
         unsigned char *plaintext, 
         void *iv,
         const unsigned char *key );
void des3_decrypt( const unsigned char *ciphertext, 
         const int ciphertext_len,
         unsigned char *plaintext, 
         void *iv,
         const unsigned char *key );

#endif