Works at least without crypto.

[userv-utils] / ipif / blowfish.h

/**/

#ifndef BLOWFISH__H_INCLUDED
#define BLOWFISH__H_INCLUDED

#include <stdint.h>

#define BLOWFISH_BLOCKBYTES 8
#define BLOWFISH_MAXKEYBYTES 56
#define BLOWFISH__N 16
#define BLOWFISH__PSIZE BLOWFISH__N+2

typedef uint32_t blowfish__p[BLOWFISH__PSIZE];
typedef uint32_t blowfish__s[4][256];

struct blowfish_expandedkey {
  blowfish__p p;
  blowfish__s s;
};

/* It's ok to pass the [_cbc]_(en|de)crypt functions the same
 * input and output pointers.
 */

void blowfish_loadkey(struct blowfish_expandedkey *ek,
		      const uint8_t *key, int keybytes);
void blowfish_encrypt(const struct blowfish_expandedkey *ek,
		      const uint8_t plain[BLOWFISH_BLOCKBYTES],
		      uint8_t cipher[BLOWFISH_BLOCKBYTES]);
void blowfish_decrypt(const struct blowfish_expandedkey *ek,
		      const uint8_t cipher[BLOWFISH_BLOCKBYTES],
		      uint8_t plain[BLOWFISH_BLOCKBYTES]);

struct blowfish_cbc_state {
  struct blowfish_expandedkey ek;
  uint32_t chainl, chainr;
};

void blowfish_cbc_setiv(struct blowfish_cbc_state *cs,
			const uint8_t iv[BLOWFISH_BLOCKBYTES]);
void blowfish_cbc_encrypt(struct blowfish_cbc_state *cs,
			  const uint8_t plain[BLOWFISH_BLOCKBYTES],
			  uint8_t cipher[BLOWFISH_BLOCKBYTES]);
void blowfish_cbc_decrypt(struct blowfish_cbc_state *cs,
			  const uint8_t cipher[BLOWFISH_BLOCKBYTES],
			  uint8_t plain[BLOWFISH_BLOCKBYTES]);

#endif