UnknownObject/js-sha256
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emn178
2015-02-10 12:00:39 +08:00
parent 90136f7a05
commit 18457729c8
5 changed files with 43 additions and 43 deletions
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src/sha256.js
+29 -33
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@@ -1,5 +1,5 @@
/*
* js-sha256 v0.2.1
* js-sha256 v0.2.2
* https://github.com/emn178/js-sha256
*
* Copyright 2014-2015, emn178@gmail.com
@@ -28,29 +28,16 @@
var blocks = [];
var sha256 = function(message) {
return sha2(message, true);
};
var sha224 = function(message) {
return sha2(message, false);
return sha256(message, true);
};
var sha2 = function(message, is256) {
var sha256 = function(message, is224) {
var h0, h1, h2, h3, h4, h5, h6, h7, block, code, first = true, end = false,
i, j, index = 0, start = 0, bytes = 0, length = message.length,
s0, s1, maj, t1, t2, ch, ab, da, cd, bc;
if(is256) {
h0 = 0x6a09e667;
h1 = 0xbb67ae85;
h2 = 0x3c6ef372;
h3 = 0xa54ff53a;
h4 = 0x510e527f;
h5 = 0x9b05688c;
h6 = 0x1f83d9ab;
h7 = 0x5be0cd19;
} else { // 224
if(is224) {
h0 = 0xc1059ed8;
h1 = 0x367cd507;
h2 = 0x3070dd17;
@@ -59,6 +46,15 @@
h5 = 0x68581511;
h6 = 0x64f98fa7;
h7 = 0xbefa4fa4;
} else { // 256
h0 = 0x6a09e667;
h1 = 0xbb67ae85;
h2 = 0x3c6ef372;
h3 = 0xa54ff53a;
h4 = 0x510e527f;
h5 = 0x9b05688c;
h6 = 0x1f83d9ab;
h7 = 0x5be0cd19;
}
block = 0;
do {
@@ -111,16 +107,16 @@
bc = b & c;
for(j = 0;j < 64;j += 4) {
if(first) {
if(is256) {
ab = 704751109;
t1 = blocks[0] - 210244248 << 0;
h = t1 - 1521486534 << 0;
d = t1 + 143694565 << 0;
} else {
if(is224) {
ab = 300032;
t1 = blocks[0] - 1413257819 << 0;
t1 = blocks[0] - 1413257819;
h = t1 - 150054599 << 0;
d = t1 + 24177077 << 0;
} else {
ab = 704751109;
t1 = blocks[0] - 210244248;
h = t1 - 1521486534 << 0;
d = t1 + 143694565 << 0;
}
first = false;
} else {
@@ -129,8 +125,8 @@
ab = a & b;
maj = ab ^ (a & c) ^ bc;
ch = (e & f) ^ (~e & g);
t1 = h + s1 + ch + K[j] + blocks[j] << 0;
t2 = s0 + maj << 0;
t1 = h + s1 + ch + K[j] + blocks[j];
t2 = s0 + maj;
h = d + t1 << 0;
d = t1 + t2 << 0;
}
@@ -139,8 +135,8 @@
da = d & a;
maj = da ^ (d & b) ^ ab;
ch = (h & e) ^ (~h & f);
t1 = g + s1 + ch + K[j + 1] + blocks[j + 1] << 0;
t2 = s0 + maj << 0;
t1 = g + s1 + ch + K[j + 1] + blocks[j + 1];
t2 = s0 + maj;
g = c + t1 << 0;
c = t1 + t2 << 0;
s0 = ((c >>> 2) | (c << 30)) ^ ((c >>> 13) | (c << 19)) ^ ((c >>> 22) | (c << 10));
@@ -148,8 +144,8 @@
cd = c & d;
maj = cd ^ (c & a) ^ da;
ch = (g & h) ^ (~g & e);
t1 = f + s1 + ch + K[j + 2] + blocks[j + 2] << 0;
t2 = s0 + maj << 0;
t1 = f + s1 + ch + K[j + 2] + blocks[j + 2];
t2 = s0 + maj;
f = b + t1 << 0;
b = t1 + t2 << 0;
s0 = ((b >>> 2) | (b << 30)) ^ ((b >>> 13) | (b << 19)) ^ ((b >>> 22) | (b << 10));
@@ -157,8 +153,8 @@
bc = b & c;
maj = bc ^ (b & d) ^ cd;
ch = (f & g) ^ (~f & h);
t1 = e + s1 + ch + K[j + 3] + blocks[j + 3] << 0;
t2 = s0 + maj << 0;
t1 = e + s1 + ch + K[j + 3] + blocks[j + 3];
t2 = s0 + maj;
e = a + t1 << 0;
a = t1 + t2 << 0;
}
@@ -201,7 +197,7 @@
HEX_CHARS[(h6 >> 20) & 0x0F] + HEX_CHARS[(h6 >> 16) & 0x0F] +
HEX_CHARS[(h6 >> 12) & 0x0F] + HEX_CHARS[(h6 >> 8) & 0x0F] +
HEX_CHARS[(h6 >> 4) & 0x0F] + HEX_CHARS[h6 & 0x0F];
if(is256) {
if(!is224) {
hex += HEX_CHARS[(h7 >> 28) & 0x0F] + HEX_CHARS[(h7 >> 24) & 0x0F] +
HEX_CHARS[(h7 >> 20) & 0x0F] + HEX_CHARS[(h7 >> 16) & 0x0F] +
HEX_CHARS[(h7 >> 12) & 0x0F] + HEX_CHARS[(h7 >> 8) & 0x0F] +