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crypto: blake2b - merge _update to api callback 

Now that there's only one call to blake2b_update, we can merge it to the
callback and simplify. The empty input check is split and the rest of
code un-indented.

Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
David Sterba 2019-11-12 11:20:29 +01:00 committed by Herbert Xu
parent a2e4bdce0f
commit 0b4b5f10ac
1 changed files with 30 additions and 36 deletions
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66
crypto/blake2b_generic.c
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@ -137,35 +137,6 @@ static void blake2b_compress(struct blake2b_state *S,
#undef G
#undef ROUND
static void blake2b_update(struct blake2b_state *S, const void *pin, size_t inlen)
{
const u8 *in = (const u8 *)pin;
if (inlen > 0) {
size_t left = S->buflen;
size_t fill = BLAKE2B_BLOCKBYTES - left;
if (inlen > fill) {
S->buflen = 0;
/* Fill buffer */
memcpy(S->buf + left, in, fill);
blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
/* Compress */
blake2b_compress(S, S->buf);
in += fill;
inlen -= fill;
while (inlen > BLAKE2B_BLOCKBYTES) {
blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
blake2b_compress(S, in);
in += BLAKE2B_BLOCKBYTES;
inlen -= BLAKE2B_BLOCKBYTES;
}
}
memcpy(S->buf + S->buflen, in, inlen);
S->buflen += inlen;
}
}
struct digest_tfm_ctx {
u8 key[BLAKE2B_KEYBYTES];
unsigned int keylen;
@ -210,12 +181,35 @@ static int blake2b_init(struct shash_desc *desc)
return 0;
}
static int digest_update(struct shash_desc *desc, const u8 *data,
unsigned int length)
static int blake2b_update(struct shash_desc *desc, const u8 *in,
unsigned int inlen)
{
struct blake2b_state *state = shash_desc_ctx(desc);
const size_t left = state->buflen;
const size_t fill = BLAKE2B_BLOCKBYTES - left;
if (!inlen)
return 0;
if (inlen > fill) {
state->buflen = 0;
/* Fill buffer */
memcpy(state->buf + left, in, fill);
blake2b_increment_counter(state, BLAKE2B_BLOCKBYTES);
/* Compress */
blake2b_compress(state, state->buf);
in += fill;
inlen -= fill;
while (inlen > BLAKE2B_BLOCKBYTES) {
blake2b_increment_counter(state, BLAKE2B_BLOCKBYTES);
blake2b_compress(state, in);
in += BLAKE2B_BLOCKBYTES;
inlen -= BLAKE2B_BLOCKBYTES;
}
}
memcpy(state->buf + state->buflen, in, inlen);
state->buflen += inlen;
blake2b_update(state, data, length);
return 0;
}
@ -252,7 +246,7 @@ static struct shash_alg blake2b_algs[] = {
.digestsize = BLAKE2B_160_DIGEST_SIZE,
.setkey = digest_setkey,
.init = blake2b_init,
.update = digest_update,
.update = blake2b_update,
.final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}, {
@ -266,7 +260,7 @@ static struct shash_alg blake2b_algs[] = {
.digestsize = BLAKE2B_256_DIGEST_SIZE,
.setkey = digest_setkey,
.init = blake2b_init,
.update = digest_update,
.update = blake2b_update,
.final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}, {
@ -280,7 +274,7 @@ static struct shash_alg blake2b_algs[] = {
.digestsize = BLAKE2B_384_DIGEST_SIZE,
.setkey = digest_setkey,
.init = blake2b_init,
.update = digest_update,
.update = blake2b_update,
.final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}, {
@ -294,7 +288,7 @@ static struct shash_alg blake2b_algs[] = {
.digestsize = BLAKE2B_512_DIGEST_SIZE,
.setkey = digest_setkey,
.init = blake2b_init,
.update = digest_update,
.update = blake2b_update,
.final = blake2b_final,
.descsize = sizeof(struct blake2b_state),
}