diff options
| -rw-r--r-- | drivers/char/random.c | 4 | ||||
| -rw-r--r-- | include/crypto/chacha.h | 9 |
2 files changed, 9 insertions, 4 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 0fe9e200e4c8..5d6acfecd919 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -819,7 +819,7 @@ static bool __init crng_init_try_arch_early(struct crng_state *crng) static void __maybe_unused crng_initialize_secondary(struct crng_state *crng) { - memcpy(&crng->state[0], "expand 32-byte k", 16); + chacha_init_consts(crng->state); _get_random_bytes(&crng->state[4], sizeof(__u32) * 12); crng_init_try_arch(crng); crng->init_time = jiffies - CRNG_RESEED_INTERVAL - 1; @@ -827,7 +827,7 @@ static void __maybe_unused crng_initialize_secondary(struct crng_state *crng) static void __init crng_initialize_primary(struct crng_state *crng) { - memcpy(&crng->state[0], "expand 32-byte k", 16); + chacha_init_consts(crng->state); _extract_entropy(&input_pool, &crng->state[4], sizeof(__u32) * 12, 0); if (crng_init_try_arch_early(crng) && trust_cpu) { invalidate_batched_entropy(); diff --git a/include/crypto/chacha.h b/include/crypto/chacha.h index 3a1c72fdb7cf..dabaee698718 100644 --- a/include/crypto/chacha.h +++ b/include/crypto/chacha.h @@ -47,13 +47,18 @@ static inline void hchacha_block(const u32 *state, u32 *out, int nrounds) hchacha_block_generic(state, out, nrounds); } -void chacha_init_arch(u32 *state, const u32 *key, const u8 *iv); -static inline void chacha_init_generic(u32 *state, const u32 *key, const u8 *iv) +static inline void chacha_init_consts(u32 *state) { state[0] = 0x61707865; /* "expa" */ state[1] = 0x3320646e; /* "nd 3" */ state[2] = 0x79622d32; /* "2-by" */ state[3] = 0x6b206574; /* "te k" */ +} + +void chacha_init_arch(u32 *state, const u32 *key, const u8 *iv); +static inline void chacha_init_generic(u32 *state, const u32 *key, const u8 *iv) +{ + chacha_init_consts(state); state[4] = key[0]; state[5] = key[1]; state[6] = key[2]; |