include/crypto/chacha20.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Common values for the ChaCha20 algorithm
   4  */
   5
   6 #ifndef _CRYPTO_CHACHA20_H
   7 #define _CRYPTO_CHACHA20_H
   8
   9 #include <crypto/skcipher.h>
  10 #include <linux/types.h>
  11 #include <linux/crypto.h>
  12
  13 #define CHACHA20_IV_SIZE        16
  14 #define CHACHA20_KEY_SIZE       32
  15 #define CHACHA20_BLOCK_SIZE     64
  16 #define CHACHA20_BLOCK_WORDS    (CHACHA20_BLOCK_SIZE / sizeof(u32))
  17
  18 struct chacha20_ctx {
  19         u32 key[8];
  20 };
  21
  22 void chacha20_block(u32 *state, u32 *stream);
  23 void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
  24 int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
  25                            unsigned int keysize);
  26 int crypto_chacha20_crypt(struct skcipher_request *req);
  27
  28 #endif