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Avoid allocation in hashblocks. #50

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Avoid allocation in hashblocks. #50

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11 changes: 6 additions & 5 deletions nacl-fast.js
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Original file line number Diff line number Diff line change
Expand Up @@ -825,9 +825,8 @@ var K = [
0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817
];

function crypto_hashblocks_hl(hh, hl, m, n) {
var wh = new Int32Array(16), wl = new Int32Array(16),
bh0, bh1, bh2, bh3, bh4, bh5, bh6, bh7,
function crypto_hashblocks_hl(hh, hl, wh, wl, m, n) {
var bh0, bh1, bh2, bh3, bh4, bh5, bh6, bh7,
bl0, bl1, bl2, bl3, bl4, bl5, bl6, bl7,
th, tl, i, j, h, l, a, b, c, d;

Expand Down Expand Up @@ -1189,6 +1188,8 @@ function crypto_hashblocks_hl(hh, hl, m, n) {
function crypto_hash(out, m, n) {
var hh = new Int32Array(8),
hl = new Int32Array(8),
tmph = new Int32Array(16),
tmpl = new Int32Array(16),
x = new Uint8Array(256),
i, b = n;

Expand All @@ -1210,7 +1211,7 @@ function crypto_hash(out, m, n) {
hl[6] = 0xfb41bd6b;
hl[7] = 0x137e2179;

crypto_hashblocks_hl(hh, hl, m, n);
crypto_hashblocks_hl(hh, hl, tmph, tmpl, m, n);
n %= 128;

for (i = 0; i < n; i++) x[i] = m[b-n+i];
Expand All @@ -1219,7 +1220,7 @@ function crypto_hash(out, m, n) {
n = 256-128*(n<112?1:0);
x[n-9] = 0;
ts64(x, n-8, (b / 0x20000000) | 0, b << 3);
crypto_hashblocks_hl(hh, hl, x, n);
crypto_hashblocks_hl(hh, hl, tmph, tmpl, x, n);

for (i = 0; i < 8; i++) ts64(out, 8*i, hh[i], hl[i]);

Expand Down
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