RanchiMall/fcoin
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optimize scrypt more.

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This commit is contained in:
Christopher Jeffrey 2016-05-31 22:58:32 -07:00
parent 3a2d800ec1
commit 6d7602ddfa
No known key found for this signature in database
GPG Key ID: 8962AB9DE6666BBD
1 changed files with 11 additions and 11 deletions
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22
lib/bcoin/scrypt.js
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@ -70,7 +70,7 @@ function scrypt(passwd, salt, N, r, p, len) {
B = utils.pbkdf2(passwd, salt, 1, p * 128 * r, 'sha256'); B = utils.pbkdf2(passwd, salt, 1, p * 128 * r, 'sha256');
for (i = 0; i < p; i++) for (i = 0; i < p; i++)
smix(B.slice(i * 128 * r), r, N, V, XY); smix(B, i * 128 * r, r, N, V, XY);
return utils.pbkdf2(passwd, B, 1, len, 'sha256'); return utils.pbkdf2(passwd, B, 1, len, 'sha256');
} }
@ -139,7 +139,7 @@ function R(a, b) {
return (a << b) | (a >>> (32 - b)); return (a << b) | (a >>> (32 - b));
} }
function blockmix_salsa8(B, Y, r) { function blockmix_salsa8(B, Y, Yo, r) {
var X = new Buffer(64); var X = new Buffer(64);
var i; var i;
@ -148,40 +148,40 @@ function blockmix_salsa8(B, Y, r) {
for (i = 0; i < 2 * r; i++) { for (i = 0; i < 2 * r; i++) {
blkxor(X, B, 0, i * 64, 64); blkxor(X, B, 0, i * 64, 64);
salsa20_8(X); salsa20_8(X);
blkcpy(Y, X, i * 64, 0, 64); blkcpy(Y, X, Yo + i * 64, 0, 64);
} }
for (i = 0; i < r; i++) for (i = 0; i < r; i++)
blkcpy(B, Y, i * 64, (i * 2) * 64, 64); blkcpy(B, Y, i * 64, Yo + (i * 2) * 64, 64);
for (i = 0; i < r; i++) for (i = 0; i < r; i++)
blkcpy(B, Y, (i + r) * 64, (i * 2 + 1) * 64, 64); blkcpy(B, Y, (i + r) * 64, Yo + (i * 2 + 1) * 64, 64);
} }
function integerify(B, r) { function integerify(B, r) {
return B.readUInt32LE((2 * r - 1) * 64, true); return B.readUInt32LE((2 * r - 1) * 64, true);
} }
function smix(B, r, N, V, XY) { function smix(B, Bo, r, N, V, XY) {
var X = XY; var X = XY;
var Y = XY.slice(128 * r); var Y = XY;
var i; var i;
var j; var j;
blkcpy(X, B, 0, 0, 128 * r); blkcpy(X, B, 0, Bo, 128 * r);
for (i = 0; i < N; i++) { for (i = 0; i < N; i++) {
blkcpy(V, X, i * (128 * r), 0, 128 * r); blkcpy(V, X, i * (128 * r), 0, 128 * r);
blockmix_salsa8(X, Y, r); blockmix_salsa8(X, Y, 128 * r, r);
} }
for (i = 0; i < N; i++) { for (i = 0; i < N; i++) {
j = integerify(X, r) & (N - 1); j = integerify(X, r) & (N - 1);
blkxor(X, V, 0, j * (128 * r), 128 * r); blkxor(X, V, 0, j * (128 * r), 128 * r);
blockmix_salsa8(X, Y, r); blockmix_salsa8(X, Y, 128 * r, r);
} }
blkcpy(B, X, 0, 0, 128 * r); blkcpy(B, X, Bo, 0, 128 * r);
} }
function blkcpy(dest, src, s1, s2, len) { function blkcpy(dest, src, s1, s2, len) {