1 /* 2 * Common values for the ChaCha20 algorithm 3 */ 4 5 #ifndef _CRYPTO_CHACHA20_H 6 #define _CRYPTO_CHACHA20_H 7 8 #include <linux/types.h> 9 #include <linux/crypto.h> 10 11 #define CHACHA20_IV_SIZE 16 12 #define CHACHA20_KEY_SIZE 32 13 #define CHACHA20_BLOCK_SIZE 64 14 15 struct chacha20_ctx { 16 u32 key[8]; 17 }; 18 19 void chacha20_block(u32 *state, void *stream); 20 void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv); 21 int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key, 22 unsigned int keysize); 23 int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, 24 struct scatterlist *src, unsigned int nbytes); 25 26 #endif 27