diff options
Diffstat (limited to 'include/crypto/chacha20.h')
| -rw-r--r-- | include/crypto/chacha20.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/crypto/chacha20.h b/include/crypto/chacha20.h index f76302d99e2b..3dd5ab189543 100644 --- a/include/crypto/chacha20.h +++ b/include/crypto/chacha20.h @@ -24,4 +24,19 @@ int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keysize); int crypto_chacha20_crypt(struct skcipher_request *req); +enum chacha_constants { /* expand 32-byte k */ + CHACHA_CONSTANT_EXPA = 0x61707865U, + CHACHA_CONSTANT_ND_3 = 0x3320646eU, + CHACHA_CONSTANT_2_BY = 0x79622d32U, + CHACHA_CONSTANT_TE_K = 0x6b206574U +}; + +static inline void chacha_init_consts(u32 *state) +{ + state[0] = CHACHA_CONSTANT_EXPA; + state[1] = CHACHA_CONSTANT_ND_3; + state[2] = CHACHA_CONSTANT_2_BY; + state[3] = CHACHA_CONSTANT_TE_K; +} + #endif |