blake2b_final is called only once, merge it to the crypto API callback
and simplify. This avoids the temporary buffer and swaps the bytes of
internal buffer.
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
crypto/blake2b_generic.c | 42 ++++++++++++++++------------------------
1 file changed, 17 insertions(+), 25 deletions(-)
diff --git a/crypto/blake2b_generic.c b/crypto/blake2b_generic.c
index 8dab65612a41..743905fabd65 100644
--- a/crypto/blake2b_generic.c
+++ b/crypto/blake2b_generic.c
@@ -276,25 +276,6 @@ static void blake2b_update(struct blake2b_state *S, const void *pin, size_t inle
}
}
-static void blake2b_final(struct blake2b_state *S, void *out, size_t outlen)
-{
- u8 buffer[BLAKE2B_OUTBYTES] = {0};
- size_t i;
-
- blake2b_increment_counter(S, S->buflen);
- blake2b_set_lastblock(S);
- /* Padding */
- memset(S->buf + S->buflen, 0, BLAKE2B_BLOCKBYTES - S->buflen);
- blake2b_compress(S, S->buf);
-
- /* Output full hash to temp buffer */
- for (i = 0; i < 8; ++i)
- put_unaligned_le64(S->h[i], buffer + sizeof(S->h[i]) * i);
-
- memcpy(out, buffer, S->outlen);
- memzero_explicit(buffer, sizeof(buffer));
-}
-
struct digest_tfm_ctx {
u8 key[BLAKE2B_KEYBYTES];
unsigned int keylen;
@@ -338,12 +319,23 @@ static int digest_update(struct shash_desc *desc, const u8 *data,
return 0;
}
-static int digest_final(struct shash_desc *desc, u8 *out)
+static int blake2b_final(struct shash_desc *desc, u8 *out)
{
struct blake2b_state *state = shash_desc_ctx(desc);
const int digestsize = crypto_shash_digestsize(desc->tfm);
+ size_t i;
+
+ blake2b_increment_counter(state, state->buflen);
+ blake2b_set_lastblock(state);
+ /* Padding */
+ memset(state->buf + state->buflen, 0, BLAKE2B_BLOCKBYTES - state->buflen);
+ blake2b_compress(state, state->buf);
+
+ /* Avoid temporary buffer and switch the internal output to LE order */
+ for (i = 0; i < ARRAY_SIZE(state->h); i++)
+ __cpu_to_le64s(&state->h[i]);
- blake2b_final(state, out, digestsize);
+ memcpy(out, state->h, digestsize);
return 0;
}
@@ -360,7 +352,7 @@ static struct shash_alg blake2b_algs[] = {
.setkey = digest_setkey,
.init = digest_init,
.update = digest_update,
- .final = digest_final,
+ .final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}, {
.base.cra_name = "blake2b-256",
@@ -374,7 +366,7 @@ static struct shash_alg blake2b_algs[] = {
.setkey = digest_setkey,
.init = digest_init,
.update = digest_update,
- .final = digest_final,
+ .final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}, {
.base.cra_name = "blake2b-384",
@@ -388,7 +380,7 @@ static struct shash_alg blake2b_algs[] = {
.setkey = digest_setkey,
.init = digest_init,
.update = digest_update,
- .final = digest_final,
+ .final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}, {
.base.cra_name = "blake2b-512",
@@ -402,7 +394,7 @@ static struct shash_alg blake2b_algs[] = {
.setkey = digest_setkey,
.init = digest_init,
.update = digest_update,
- .final = digest_final,
+ .final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}
};
--
2.23.0
