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faster scrypt.

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This commit is contained in:
Christopher Jeffrey 2016-05-31 22:52:12 -07:00
parent 0c4df11cb6
commit 3a2d800ec1
No known key found for this signature in database
GPG Key ID: 8962AB9DE6666BBD
1 changed files with 13 additions and 13 deletions
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26
lib/bcoin/scrypt.js
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@ -143,19 +143,19 @@ function blockmix_salsa8(B, Y, r) {
var X = new Buffer(64);
var i;
blkcpy(X, B.slice((2 * r - 1) * 64), 64);
blkcpy(X, B, 0, (2 * r - 1) * 64, 64);
for (i = 0; i < 2 * r; i++) {
blkxor(X, B.slice(i * 64), 64);
blkxor(X, B, 0, i * 64, 64);
salsa20_8(X);
blkcpy(Y.slice(i * 64), X, 64);
blkcpy(Y, X, i * 64, 0, 64);
}
for (i = 0; i < r; i++)
blkcpy(B.slice(i * 64), Y.slice((i * 2) * 64), 64);
blkcpy(B, Y, i * 64, (i * 2) * 64, 64);
for (i = 0; i < r; i++)
blkcpy(B.slice((i + r) * 64), Y.slice((i * 2 + 1) * 64), 64);
blkcpy(B, Y, (i + r) * 64, (i * 2 + 1) * 64, 64);
}
function integerify(B, r) {
@ -168,29 +168,29 @@ function smix(B, r, N, V, XY) {
var i;
var j;
blkcpy(X, B, 128 * r);
blkcpy(X, B, 0, 0, 128 * r);
for (i = 0; i < N; i++) {
blkcpy(V.slice(i * (128 * r)), X, 128 * r);
blkcpy(V, X, i * (128 * r), 0, 128 * r);
blockmix_salsa8(X, Y, r);
}
for (i = 0; i < N; i++) {
j = integerify(X, r) & (N - 1);
blkxor(X, V.slice(j * (128 * r)), 128 * r);
blkxor(X, V, 0, j * (128 * r), 128 * r);
blockmix_salsa8(X, Y, r);
}
blkcpy(B, X, 128 * r);
blkcpy(B, X, 0, 0, 128 * r);
}
function blkcpy(dest, src, len) {
src.copy(dest, 0, 0, len);
function blkcpy(dest, src, s1, s2, len) {
src.copy(dest, s1, s2, s2 + len);
}
function blkxor(dest, src, len) {
function blkxor(dest, src, s1, s2, len) {
for (var i = 0; i < len; i++)
dest[i] ^= src[i];
dest[s1 + i] ^= src[s2 + i];
}
/*