/*
* Secure Hash Algorithm classes
* Copyright (c) 2013, Jeff Lyon. (http://rubbingalcoholic.com)
*
* Licensed under The MIT License. (http://www.opensource.org/licenses/mit-license.php)
* Redistributions of files must retain the above copyright notice.
*/
/**
* @class
* @classdesc Implements the SHA-1 secure hash algorithm specified in FIPS 180-4 ({@link http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf})
* @extends Hasher
* @desc Creates a new SHA-1 instance.
* @requires convert
*/
var SHA1 = new Class(
/** @lends SHA1.prototype */
{
Extends: Hasher,
/**
* The block size in bits for the hashing operation
* @private
* @type {number}
*/
block_size: 512,
/**
* The length in bits of the output block
* @private
* @type {number}
*/
outlen: 160,
/**
* This is called automatically on class instantiation.
* @return {SHA1}
*/
initialize: function()
{
this.clear();
return this;
},
/**
* Initialize class values, invoking {@link Hasher#clear} before clearing values specific to {@link SHA1}.
* This is called internally at the end of {@link SHA1#finalize}, and can be called explicitly when
* using progressive hashing.
* @override
*/
clear: function()
{
this.parent();
this.h = [
0x67452301,
0xEFCDAB89,
0x98BADCFE,
0x10325476,
0xC3D2E1F0
];
},
/**
* Hashes data into the SHA1 class instance.
*
* @param {string} data ASCII-encoded binary string data to hash. Any non-ASCII characters
* should be first encoded out using {@link convert.utf8.encode}
* @param {Object} [options] Optional options object
* @param {boolean} [options.stream=false] Whether to use streaming (progressive hashing) mode. In streaming
* mode, you can repeatedly hash data into the SHA1 object.
* The hash will not be finalized and returned until you call
* {@link SHA1#finalize}. Streaming mode is useful when you have to
* hash a huge amount of data and you don't want to store all
* of it in memory at one time.
* @param {string} [options.return_format='hex'] (binary|hex|words) The return format. Default: hex
*
* @return {string|Array|SHA1} Desired output format if streaming mode is turned off. Otherwise this instance (chainable)
*/
hash: function(data, options)
{
options || (options = {});
options.stream || (options.stream = false);
if (typeof data == 'string')
data = convert.to_bytes(data);
var _buffer = this.buffer.concat(data);
var _processed_length = this.processed_length;
var h = this.h;
for (var i=0; (i+64) <= _buffer.length; i += 64)
{
var a = h[0], b = h[1], c = h[2], d = h[3], e = h[4], w = convert.to_words(_buffer.slice(i, i+64));
for (var t = 0; t < 80; t++)
{
if (t >= 16)
{
var _wt = w[t-3] ^ w[t-8] ^ w[t-14] ^ w[t-16];
w[t] = (_wt << 1) | (_wt >>> 31);
}
var temp = ((a << 5) | (a >>> 27)) + e + w[t];
if (t < 20)
temp += ((b & c) | (~b & d)) + 0x5A827999;
else if (t < 40)
temp += (b ^ c ^ d) + 0x6ed9eba1;
else if (t < 60)
temp += ((b & c) | (b & d) | (c & d)) + 0x8F1BBCDC;
else // if (t < 80)
temp += (b ^ c ^ d) + 0xCA62C1D6;
var e = d, d = c, c = (b << 30) | (b >>> 2), b = a, a = temp;
}
h[0] += a;
h[1] += b;
h[2] += c;
h[3] += d;
h[4] += e;
_processed_length += 512;
}
this.buffer = _buffer.slice(i);
this.processed_length = _processed_length;
if (options.stream == false)
return this.finalize(options);
return this;
}
});
/**
* @class
* @classdesc Implements the SHA-256 secure hash algorithm specified in FIPS 180-4 ({@link http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf})
* @extends Hasher
* @desc Creates a new SHA-256 instance.
* @requires convert
*/
var SHA256 = new Class(
/** @lends SHA256.prototype */
{
Extends: Hasher,
/**
* The block size in bits for the hashing operation
* @private
* @type {number}
*/
block_size: 512,
/**
* The length in bits of the output block
* @private
* @type {number}
*/
outlen: 256,
/**
* Constants lookup table used for bitwise operations in the SHA256 algorithm
* @private
*/
k: [
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
],
/**
* This is called automatically on class instantiation.
* @return {SHA256}
*/
initialize: function()
{
this.clear();
},
/**
* Initialize class values, invoking {@link Hasher#clear} before clearing values specific to {@link SHA1}.
* This is called internally at the end of {@link SHA256#finalize}, and can be called explicitly when
* using progressive hashing.
* @override
*/
clear: function()
{
this.parent();
this.h = [
0x6a09e667,
0xbb67ae85,
0x3c6ef372,
0xa54ff53a,
0x510e527f,
0x9b05688c,
0x1f83d9ab,
0x5be0cd19
];
},
/**
* Hashes data into the SHA256 class instance.
*
* @param {string} data ASCII-encoded binary string data to hash. Any non-ASCII characters
* should be first encoded out using {@link convert.utf8.encode}
* @param {Object} [options] Optional options object
* @param {boolean} [options.stream=false] Whether to use streaming (progressive hashing) mode. In streaming
* mode, you can repeatedly hash data into the SHA256 object.
* The hash will not be finalized and returned until you call
* {@link SHA256#finalize}. Streaming mode is useful when you have to
* hash a huge amount of data and you don't want to store all
* of it in memory at one time.
* @param {string} [options.return_format='hex'] (binary|hex|words) The return format. Default: hex
*
* @return {string|Array|SHA256} Desired output format if streaming mode is turned off. Otherwise this instance (chainable)
*/
hash: function(data, options)
{
options || (options = {});
options.stream || (options.stream = false);
if (typeof data == 'string')
data = convert.to_bytes(data);
var _buffer = this.buffer.concat(data);
var _processed_length = this.processed_length;
var k = this.k;
var h = this.h;
for (var i=0; (i+64) <= _buffer.length; i += 64)
{
var w = convert.to_words(_buffer.slice(i, i+64));
var a = h[0], b = h[1], c = h[2], d = h[3], e = h[4], f = h[5], g = h[6], _h = h[7];
for (var t = 0; t < 64; t++)
{
if (t >= 16)
{
w[t] = (
(((w[t-2] >>> 17) | (w[t-2] << 15)) ^ ((w[t-2] >>> 19) | (w[t-2] << 13)) ^ (w[t-2] >>> 10))
+ w[t-7]
+ (((w[t-15] >>> 7) | (w[t-15] << 25)) ^ ((w[t-15] >>> 18) | (w[t-15] << 14)) ^ (w[t-15] >>> 3))
+ w[t-16]
);
}
var temp1 = (
_h
+ (((e >>> 6) | (e << 26)) ^ ((e >>> 11) | (e << 21)) ^ ((e >>> 25) | (e << 7)))
+ ((e & f) ^ (~e & g))
+ k[t]
+ w[t]
) % Math.pow(2,32);
var temp2 = (
((a >>> 2) | (a << 30)) ^ ((a >>> 13) | (a << 19)) ^ ((a >>> 22) | (a << 10)))
+ ((a & b) ^ (a & c) ^ (b & c)
);
var _h = g, g = f, f = e, e = d + temp1, d = c, c = b, b = a, a = temp1 + temp2;
}
h[0] += a;
h[1] += b;
h[2] += c;
h[3] += d;
h[4] += e;
h[5] += f;
h[6] += g;
h[7] += _h;
_processed_length += 512;
}
this.buffer = _buffer.slice(i);
this.processed_length = _processed_length;
if (options.stream == false)
return this.finalize(options);
return this;
}
});