experimental/tiny_sha3_bit_interleaved
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Added SHAKE128/256 code and test vectors.

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This commit is contained in:
Markku-Juhani O. Saarinen
2015-12-27 13:27:27 +00:00
parent e827929647
commit cc3d33a961
4 changed files with 109 additions and 11 deletions
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30
sha3.c
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@@ -124,7 +124,7 @@ int sha3_update(sha3_ctx_t *c, const void *data, size_t len)
for (i = 0; i < len; i++) {
c->st.b[j++] ^= ((const uint8_t *) data)[i];
if (j >= c->rsiz) {
sha3_keccakf(c->st.q, SHA3_ROUNDS);
sha3_keccakf(c->st.q, KECCAKF_ROUNDS);
j = 0;
}
}
@@ -141,7 +141,7 @@ int sha3_final(void *md, sha3_ctx_t *c)
c->st.b[c->pt] ^= 0x06;
c->st.b[c->rsiz - 1] ^= 0x80;
sha3_keccakf(c->st.q, SHA3_ROUNDS);
sha3_keccakf(c->st.q, KECCAKF_ROUNDS);
for (i = 0; i < c->mdlen; i++) {
((uint8_t *) md)[i] = c->st.b[i];
@@ -163,3 +163,29 @@ void *sha3(const void *in, size_t inlen, void *md, int mdlen)
return md;
}
// SHAKE128 and SHAKE256 extensible-output functionality
void shake_xof(sha3_ctx_t *c)
{
c->st.b[c->pt] ^= 0x1F;
c->st.b[c->rsiz - 1] ^= 0x80;
sha3_keccakf(c->st.q, KECCAKF_ROUNDS);
c->pt = 0;
}
void shake_out(sha3_ctx_t *c, void *out, size_t len)
{
size_t i;
int j;
j = c->pt;
for (i = 0; i < len; i++) {
if (j >= c->rsiz) {
sha3_keccakf(c->st.q, KECCAKF_ROUNDS);
j = 0;
}
((uint8_t *) out)[i] = c->st.b[j++];
}
c->pt = j;
}