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 17 struct chacha20_ctx { 18 u32 key[8]; 19 }; 20 21 void chacha20_block(u32 *state, u8 *stream); 22 void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv); 23 int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key, 24 unsigned int keysize); 25 int crypto_chacha20_crypt(struct skcipher_request *req); 26 27 #endif 28