sys/crypto/chacha/chacha.h

   1 #ifndef _CRYPTO_CHACHA_H_
   2 #define _CRYPTO_CHACHA_H_
   3
   4 #define CHACHA_NONCELEN         8
   5 #define CHACHA_CTRLEN           8
   6 #define CHACHA_STATELEN         (CHACHA_NONCELEN + CHACHA_CTRLEN)
   7 #define CHACHA_BLOCKLEN         64
   8
   9 typedef struct chacha_ctx
  10 {
  11   uint32_t input[16]; /* could be compressed */
  12 } chacha_ctx;
  13
  14 void chacha_keysetup(chacha_ctx *x, const uint8_t *k, uint32_t kbits);
  15 void chacha_ivsetup(chacha_ctx *x, const uint8_t *iv);
  16 void chacha_encrypt_bytes(chacha_ctx *x, const uint8_t *m, uint8_t *c, uint32_t bytes);
  17 void chacha_decrypt_bytes(chacha_ctx *x, const uint8_t *c, uint8_t *m, uint32_t bytes);
  18 void chacha_keystream_bytes(chacha_ctx *x, uint8_t *stream, uint32_t bytes);
  19 int chacha_incr_counter(chacha_ctx *x);
  20 int chacha_check_counter(chacha_ctx *x);
  21
  22 #endif