ipif/blowfish.h

   1 /**/
   2
   3 #ifndef BLOWFISH__H_INCLUDED
   4 #define BLOWFISH__H_INCLUDED
   5
   6 #include <stdint.h>
   7
   8 #define BLOWFISH_BLOCKBYTES 8
   9 #define BLOWFISH_MAXKEYBYTES 56
  10 #define BLOWFISH__N 16
  11 #define BLOWFISH__PSIZE BLOWFISH__N+2
  12
  13 typedef uint32_t blowfish__p[BLOWFISH__PSIZE];
  14 typedef uint32_t blowfish__s[4][256];
  15
  16 struct blowfish_expandedkey {
  17   blowfish__p p;
  18   blowfish__s s;
  19 };
  20
  21 /* It's ok to pass the [_cbc]_(en|de)crypt functions the same
  22  * input and output pointers.
  23  */
  24
  25 void blowfish_loadkey(struct blowfish_expandedkey *ek,
  26                       const uint8_t *key, int keybytes);
  27 void blowfish_encrypt(const struct blowfish_expandedkey *ek,
  28                       const uint8_t plain[BLOWFISH_BLOCKBYTES],
  29                       uint8_t cipher[BLOWFISH_BLOCKBYTES]);
  30 void blowfish_decrypt(const struct blowfish_expandedkey *ek,
  31                       const uint8_t cipher[BLOWFISH_BLOCKBYTES],
  32                       uint8_t plain[BLOWFISH_BLOCKBYTES]);
  33
  34 struct blowfish_cbc_state {
  35   struct blowfish_expandedkey ek;
  36   uint32_t chainl, chainr;
  37 };
  38
  39 void blowfish_cbc_setiv(struct blowfish_cbc_state *cs,
  40                         const uint8_t iv[BLOWFISH_BLOCKBYTES]);
  41 void blowfish_cbc_encrypt(struct blowfish_cbc_state *cs,
  42                           const uint8_t plain[BLOWFISH_BLOCKBYTES],
  43                           uint8_t cipher[BLOWFISH_BLOCKBYTES]);
  44 void blowfish_cbc_decrypt(struct blowfish_cbc_state *cs,
  45                           const uint8_t cipher[BLOWFISH_BLOCKBYTES],
  46                           uint8_t plain[BLOWFISH_BLOCKBYTES]);
  47
  48 #endif