// Select components from sjcl to suit the crypto operations bip39 requires.
//// base.js
/** @fileOverview Javascript cryptography implementation.
*
* Crush to remove comments, shorten variable names and
* generally reduce transmission size.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
"use strict";
/*jslint indent: 2, bitwise: false, nomen: false, plusplus: false, white: false, regexp: false */
/*global document, window, escape, unescape, module, require, Uint32Array */
/** @namespace The Stanford Javascript Crypto Library, top-level namespace. */
var sjcl = {
/** @namespace Symmetric ciphers. */
cipher: {},
/** @namespace Hash functions. Right now only SHA256 is implemented. */
hash: {},
/** @namespace Key exchange functions. Right now only SRP is implemented. */
keyexchange: {},
/** @namespace Block cipher modes of operation. */
mode: {},
/** @namespace Miscellaneous. HMAC and PBKDF2. */
misc: {},
/**
* @namespace Bit array encoders and decoders.
*
* @description
* The members of this namespace are functions which translate between
* SJCL's bitArrays and other objects (usually strings). Because it
* isn't always clear which direction is encoding and which is decoding,
* the method names are "fromBits" and "toBits".
*/
codec: {},
/** @namespace Exceptions. */
exception: {
/** @constructor Ciphertext is corrupt. */
corrupt: function(message) {
this.toString = function() { return "CORRUPT: "+this.message; };
this.message = message;
},
/** @constructor Invalid parameter. */
invalid: function(message) {
this.toString = function() { return "INVALID: "+this.message; };
this.message = message;
},
/** @constructor Bug or missing feature in SJCL. @constructor */
bug: function(message) {
this.toString = function() { return "BUG: "+this.message; };
this.message = message;
},
/** @constructor Something isn't ready. */
notReady: function(message) {
this.toString = function() { return "NOT READY: "+this.message; };
this.message = message;
}
}
};
if(typeof module !== 'undefined' && module.exports){
module.exports = sjcl;
}
if (typeof define === "function") {
define([], function () {
return sjcl;
});
}
//// bitArray.js
/** @fileOverview Arrays of bits, encoded as arrays of Numbers.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/** @namespace Arrays of bits, encoded as arrays of Numbers.
*
* @description
* <p>
* These objects are the currency accepted by SJCL's crypto functions.
* </p>
*
* <p>
* Most of our crypto primitives operate on arrays of 4-byte words internally,
* but many of them can take arguments that are not a multiple of 4 bytes.
* This library encodes arrays of bits (whose size need not be a multiple of 8
* bits) as arrays of 32-bit words. The bits are packed, big-endian, into an
* array of words, 32 bits at a time. Since the words are double-precision
* floating point numbers, they fit some extra data. We use this (in a private,
* possibly-changing manner) to encode the number of bits actually present
* in the last word of the array.
* </p>
*
* <p>
* Because bitwise ops clear this out-of-band data, these arrays can be passed
* to ciphers like AES which want arrays of words.
* </p>
*/
sjcl.bitArray = {
/**
* Array slices in units of bits.
* @param {bitArray} a The array to slice.
* @param {Number} bstart The offset to the start of the slice, in bits.
* @param {Number} bend The offset to the end of the slice, in bits. If this is undefined,
* slice until the end of the array.
* @return {bitArray} The requested slice.
*/
bitSlice: function (a, bstart, bend) {
a = sjcl.bitArray._shiftRight(a.slice(bstart/32), 32 - (bstart & 31)).slice(1);
return (bend === undefined) ? a : sjcl.bitArray.clamp(a, bend-bstart);
},
/**
* Extract a number packed into a bit array.
* @param {bitArray} a The array to slice.
* @param {Number} bstart The offset to the start of the slice, in bits.
* @param {Number} length The length of the number to extract.
* @return {Number} The requested slice.
*/
extract: function(a, bstart, blength) {
// FIXME: this Math.floor is not necessary at all, but for some reason
// seems to suppress a bug in the Chromium JIT.
var x, sh = Math.floor((-bstart-blength) & 31);
if ((bstart + blength - 1 ^ bstart) & -32) {
// it crosses a boundary
x = (a[bstart/32|0] << (32 - sh)) ^ (a[bstart/32+1|0] >>> sh);
} else {
// within a single word
x = a[bstart/32|0] >>> sh;
}
return x & ((1<<blength) - 1);
},
/**
* Concatenate two bit arrays.
* @param {bitArray} a1 The first array.
* @param {bitArray} a2 The second array.
* @return {bitArray} The concatenation of a1 and a2.
*/
concat: function (a1, a2) {
if (a1.length === 0 || a2.length === 0) {
return a1.concat(a2);
}
var last = a1[a1.length-1], shift = sjcl.bitArray.getPartial(last);
if (shift === 32) {
return a1.concat(a2);
} else {
return sjcl.bitArray._shiftRight(a2, shift, last|0, a1.slice(0,a1.length-1));
}
},
/**
* Find the length of an array of bits.
* @param {bitArray} a The array.
* @return {Number} The length of a, in bits.
*/
bitLength: function (a) {
var l = a.length, x;
if (l === 0) { return 0; }
x = a[l - 1];
return (l-1) * 32 + sjcl.bitArray.getPartial(x);
},
/**
* Truncate an array.
* @param {bitArray} a The array.
* @param {Number} len The length to truncate to, in bits.
* @return {bitArray} A new array, truncated to len bits.
*/
clamp: function (a, len) {
if (a.length * 32 < len) { return a; }
a = a.slice(0, Math.ceil(len / 32));
var l = a.length;
len = len & 31;
if (l > 0 && len) {
a[l-1] = sjcl.bitArray.partial(len, a[l-1] & 0x80000000 >> (len-1), 1);
}
return a;
},
/**
* Make a partial word for a bit array.
* @param {Number} len The number of bits in the word.
* @param {Number} x The bits.
* @param {Number} [0] _end Pass 1 if x has already been shifted to the high side.
* @return {Number} The partial word.
*/
partial: function (len, x, _end) {
if (len === 32) { return x; }
return (_end ? x|0 : x << (32-len)) + len * 0x10000000000;
},
/**
* Get the number of bits used by a partial word.
* @param {Number} x The partial word.
* @return {Number} The number of bits used by the partial word.
*/
getPartial: function (x) {
return Math.round(x/0x10000000000) || 32;
},
/**
* Compare two arrays for equality in a predictable amount of time.
* @param {bitArray} a The first array.
* @param {bitArray} b The second array.
* @return {boolean} true if a == b; false otherwise.
*/
equal: function (a, b) {
if (sjcl.bitArray.bitLength(a) !== sjcl.bitArray.bitLength(b)) {
return false;
}
var x = 0, i;
for (i=0; i<a.length; i++) {
x |= a[i]^b[i];
}
return (x === 0);
},
/** Shift an array right.
* @param {bitArray} a The array to shift.
* @param {Number} shift The number of bits to shift.
* @param {Number} [carry=0] A byte to carry in
* @param {bitArray} [out=[]] An array to prepend to the output.
* @private
*/
_shiftRight: function (a, shift, carry, out) {
var i, last2=0, shift2;
if (out === undefined) { out = []; }
for (; shift >= 32; shift -= 32) {
out.push(carry);
carry = 0;
}
if (shift === 0) {
return out.concat(a);
}
for (i=0; i<a.length; i++) {
out.push(carry | a[i]>>>shift);
carry = a[i] << (32-shift);
}
last2 = a.length ? a[a.length-1] : 0;
shift2 = sjcl.bitArray.getPartial(last2);
out.push(sjcl.bitArray.partial(shift+shift2 & 31, (shift + shift2 > 32) ? carry : out.pop(),1));
return out;
},
/** xor a block of 4 words together.
* @private
*/
_xor4: function(x,y) {
return [x[0]^y[0],x[1]^y[1],x[2]^y[2],x[3]^y[3]];
},
/** byteswap a word array inplace.
* (does not handle partial words)
* @param {sjcl.bitArray} a word array
* @return {sjcl.bitArray} byteswapped array
*/
byteswapM: function(a) {
var i, v, m = 0xff00;
for (i = 0; i < a.length; ++i) {
v = a[i];
a[i] = (v >>> 24) | ((v >>> 8) & m) | ((v & m) << 8) | (v << 24);
}
return a;
}
};
//// codecString.js
/** @fileOverview Bit array codec implementations.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/** @namespace UTF-8 strings */
sjcl.codec.utf8String = {
/** Convert from a bitArray to a UTF-8 string. */
fromBits: function (arr) {
var out = "", bl = sjcl.bitArray.bitLength(arr), i, tmp;
for (i=0; i<bl/8; i++) {
if ((i&3) === 0) {
tmp = arr[i/4];
}
out += String.fromCharCode(tmp >>> 24);
tmp <<= 8;
}
return decodeURIComponent(escape(out));
},
/** Convert from a UTF-8 string to a bitArray. */
toBits: function (str) {
str = unescape(encodeURIComponent(str));
var out = [], i, tmp=0;
for (i=0; i<str.length; i++) {
tmp = tmp << 8 | str.charCodeAt(i);
if ((i&3) === 3) {
out.push(tmp);
tmp = 0;
}
}
if (i&3) {
out.push(sjcl.bitArray.partial(8*(i&3), tmp));
}
return out;
}
};
//// codecHex.js
/** @fileOverview Bit array codec implementations.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/** @namespace Hexadecimal */
sjcl.codec.hex = {
/** Convert from a bitArray to a hex string. */
fromBits: function (arr) {
var out = "", i;
for (i=0; i<arr.length; i++) {
out += ((arr[i]|0)+0xF00000000000).toString(16).substr(4);
}
return out.substr(0, sjcl.bitArray.bitLength(arr)/4);//.replace(/(.{8})/g, "$1 ");
},
/** Convert from a hex string to a bitArray. */
toBits: function (str) {
var i, out=[], len;
str = str.replace(/\s|0x/g, "");
len = str.length;
str = str + "00000000";
for (i=0; i<str.length; i+=8) {
out.push(parseInt(str.substr(i,8),16)^0);
}
return sjcl.bitArray.clamp(out, len*4);
}
};
//// sha512.js
/** @fileOverview Javascript SHA-512 implementation.
*
* This implementation was written for CryptoJS by Jeff Mott and adapted for
* SJCL by Stefan Thomas.
*
* CryptoJS (c) 2009–2012 by Jeff Mott. All rights reserved.
* Released with New BSD License
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
* @author Jeff Mott
* @author Stefan Thomas
*/
/**
* Context for a SHA-512 operation in progress.
* @constructor
* @class Secure Hash Algorithm, 512 bits.
*/
sjcl.hash.sha512 = function (hash) {
if (!this._key[0]) { this._precompute(); }
if (hash) {
this._h = hash._h.slice(0);
this._buffer = hash._buffer.slice(0);
this._length = hash._length;
} else {
this.reset();
}
};
/**
* Hash a string or an array of words.
* @static
* @param {bitArray|String} data the data to hash.
* @return {bitArray} The hash value, an array of 16 big-endian words.
*/
sjcl.hash.sha512.hash = function (data) {
return (new sjcl.hash.sha512()).update(data).finalize();
};
sjcl.hash.sha512.prototype = {
/**
* The hash's block size, in bits.
* @constant
*/
blockSize: 1024,
/**
* Reset the hash state.
* @return this
*/
reset:function () {
this._h = this._init.slice(0);
this._buffer = [];
this._length = 0;
return this;
},
/**
* Input several words to the hash.
* @param {bitArray|String} data the data to hash.
* @return this
*/
update: function (data) {
if (typeof data === "string") {
data = sjcl.codec.utf8String.toBits(data);
}
var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
ol = this._length,
nl = this._length = ol + sjcl.bitArray.bitLength(data);
for (i = 1024+ol & -1024; i <= nl; i+= 1024) {
this._block(b.splice(0,32));
}
return this;
},
/**
* Complete hashing and output the hash value.
* @return {bitArray} The hash value, an array of 16 big-endian words.
*/
finalize:function () {
var i, b = this._buffer, h = this._h;
// Round out and push the buffer
b = sjcl.bitArray.concat(b, [sjcl.bitArray.partial(1,1)]);
// Round out the buffer to a multiple of 32 words, less the 4 length words.
for (i = b.length + 4; i & 31; i++) {
b.push(0);
}
// append the length
b.push(0);
b.push(0);
b.push(Math.floor(this._length / 0x100000000));
b.push(this._length | 0);
while (b.length) {
this._block(b.splice(0,32));
}
this.reset();
return h;
},
/**
* The SHA-512 initialization vector, to be precomputed.
* @private
*/
_init:[],
/**
* Least significant 24 bits of SHA512 initialization values.
*
* Javascript only has 53 bits of precision, so we compute the 40 most
* significant bits and add the remaining 24 bits as constants.
*
* @private
*/
_initr: [ 0xbcc908, 0xcaa73b, 0x94f82b, 0x1d36f1, 0xe682d1, 0x3e6c1f, 0x41bd6b, 0x7e2179 ],
/*
_init:
[0x6a09e667, 0xf3bcc908, 0xbb67ae85, 0x84caa73b, 0x3c6ef372, 0xfe94f82b, 0xa54ff53a, 0x5f1d36f1,
0x510e527f, 0xade682d1, 0x9b05688c, 0x2b3e6c1f, 0x1f83d9ab, 0xfb41bd6b, 0x5be0cd19, 0x137e2179],
*/
/**
* The SHA-512 hash key, to be precomputed.
* @private
*/
_key:[],
/**
* Least significant 24 bits of SHA512 key values.
* @private
*/
_keyr:
[0x28ae22, 0xef65cd, 0x4d3b2f, 0x89dbbc, 0x48b538, 0x05d019, 0x194f9b, 0x6d8118,
0x030242, 0x706fbe, 0xe4b28c, 0xffb4e2, 0x7b896f, 0x1696b1, 0xc71235, 0x692694,
0xf14ad2, 0x4f25e3, 0x8cd5b5, 0xac9c65, 0x2b0275, 0xa6e483, 0x41fbd4, 0x1153b5,
0x66dfab, 0xb43210, 0xfb213f, 0xef0ee4, 0xa88fc2, 0x0aa725, 0x03826f, 0x0e6e70,
0xd22ffc, 0x26c926, 0xc42aed, 0x95b3df, 0xaf63de, 0x77b2a8, 0xedaee6, 0x82353b,
0xf10364, 0x423001, 0xf89791, 0x54be30, 0xef5218, 0x65a910, 0x71202a, 0xbbd1b8,
0xd2d0c8, 0x41ab53, 0x8eeb99, 0x9b48a8, 0xc95a63, 0x418acb, 0x63e373, 0xb2b8a3,
0xefb2fc, 0x172f60, 0xf0ab72, 0x6439ec, 0x631e28, 0x82bde9, 0xc67915, 0x72532b,
0x26619c, 0xc0c207, 0xe0eb1e, 0x6ed178, 0x176fba, 0xc898a6, 0xf90dae, 0x1c471b,
0x047d84, 0xc72493, 0xc9bebc, 0x100d4c, 0x3e42b6, 0x657e2a, 0xd6faec, 0x475817],
/*
_key:
[0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd, 0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,
0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019, 0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,
0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe, 0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,
0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1, 0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,
0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3, 0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,
0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483, 0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,
0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210, 0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,
0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725, 0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,
0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926, 0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,
0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8, 0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,
0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001, 0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,
0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910, 0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,
0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53, 0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,
0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb, 0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,
0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60, 0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,
0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9, 0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,
0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207, 0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,
0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6, 0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,
0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493, 0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,
0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a, 0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817],
*/
/**
* Function to precompute _init and _key.
* @private
*/
_precompute: function () {
// XXX: This code is for precomputing the SHA256 constants, change for
// SHA512 and re-enable.
var i = 0, prime = 2, factor;
function frac(x) { return (x-Math.floor(x)) * 0x100000000 | 0; }
function frac2(x) { return (x-Math.floor(x)) * 0x10000000000 & 0xff; }
outer: for (; i<80; prime++) {
for (factor=2; factor*factor <= prime; factor++) {
if (prime % factor === 0) {
// not a prime
continue outer;
}
}
if (i<8) {
this._init[i*2] = frac(Math.pow(prime, 1/2));
this._init[i*2+1] = (frac2(Math.pow(prime, 1/2)) << 24) | this._initr[i];
}
this._key[i*2] = frac(Math.pow(prime, 1/3));
this._key[i*2+1] = (frac2(Math.pow(prime, 1/3)) << 24) | this._keyr[i];
i++;
}
},
/**
* Perform one cycle of SHA-512.
* @param {bitArray} words one block of words.
* @private
*/
_block:function (words) {
var i, wrh, wrl,
w = words.slice(0),
h = this._h,
k = this._key,
h0h = h[ 0], h0l = h[ 1], h1h = h[ 2], h1l = h[ 3],
h2h = h[ 4], h2l = h[ 5], h3h = h[ 6], h3l = h[ 7],
h4h = h[ 8], h4l = h[ 9], h5h = h[10], h5l = h[11],
h6h = h[12], h6l = h[13], h7h = h[14], h7l = h[15];
// Working variables
var ah = h0h, al = h0l, bh = h1h, bl = h1l,
ch = h2h, cl = h2l, dh = h3h, dl = h3l,
eh = h4h, el = h4l, fh = h5h, fl = h5l,
gh = h6h, gl = h6l, hh = h7h, hl = h7l;
for (i=0; i<80; i++) {
// load up the input word for this round
if (i<16) {
wrh = w[i * 2];
wrl = w[i * 2 + 1];
} else {
// Gamma0
var gamma0xh = w[(i-15) * 2];
var gamma0xl = w[(i-15) * 2 + 1];
var gamma0h =
((gamma0xl << 31) | (gamma0xh >>> 1)) ^
((gamma0xl << 24) | (gamma0xh >>> 8)) ^
(gamma0xh >>> 7);
var gamma0l =
((gamma0xh << 31) | (gamma0xl >>> 1)) ^
((gamma0xh << 24) | (gamma0xl >>> 8)) ^
((gamma0xh << 25) | (gamma0xl >>> 7));
// Gamma1
var gamma1xh = w[(i-2) * 2];
var gamma1xl = w[(i-2) * 2 + 1];
var gamma1h =
((gamma1xl << 13) | (gamma1xh >>> 19)) ^
((gamma1xh << 3) | (gamma1xl >>> 29)) ^
(gamma1xh >>> 6);
var gamma1l =
((gamma1xh << 13) | (gamma1xl >>> 19)) ^
((gamma1xl << 3) | (gamma1xh >>> 29)) ^
((gamma1xh << 26) | (gamma1xl >>> 6));
// Shortcuts
var wr7h = w[(i-7) * 2];
var wr7l = w[(i-7) * 2 + 1];
var wr16h = w[(i-16) * 2];
var wr16l = w[(i-16) * 2 + 1];
// W(round) = gamma0 + W(round - 7) + gamma1 + W(round - 16)
wrl = gamma0l + wr7l;
wrh = gamma0h + wr7h + ((wrl >>> 0) < (gamma0l >>> 0) ? 1 : 0);
wrl += gamma1l;
wrh += gamma1h + ((wrl >>> 0) < (gamma1l >>> 0) ? 1 : 0);
wrl += wr16l;
wrh += wr16h + ((wrl >>> 0) < (wr16l >>> 0) ? 1 : 0);
}
w[i*2] = wrh |= 0;
w[i*2 + 1] = wrl |= 0;
// Ch
var chh = (eh & fh) ^ (~eh & gh);
var chl = (el & fl) ^ (~el & gl);
// Maj
var majh = (ah & bh) ^ (ah & ch) ^ (bh & ch);
var majl = (al & bl) ^ (al & cl) ^ (bl & cl);
// Sigma0
var sigma0h = ((al << 4) | (ah >>> 28)) ^ ((ah << 30) | (al >>> 2)) ^ ((ah << 25) | (al >>> 7));
var sigma0l = ((ah << 4) | (al >>> 28)) ^ ((al << 30) | (ah >>> 2)) ^ ((al << 25) | (ah >>> 7));
// Sigma1
var sigma1h = ((el << 18) | (eh >>> 14)) ^ ((el << 14) | (eh >>> 18)) ^ ((eh << 23) | (el >>> 9));
var sigma1l = ((eh << 18) | (el >>> 14)) ^ ((eh << 14) | (el >>> 18)) ^ ((el << 23) | (eh >>> 9));
// K(round)
var krh = k[i*2];
var krl = k[i*2+1];
// t1 = h + sigma1 + ch + K(round) + W(round)
var t1l = hl + sigma1l;
var t1h = hh + sigma1h + ((t1l >>> 0) < (hl >>> 0) ? 1 : 0);
t1l += chl;
t1h += chh + ((t1l >>> 0) < (chl >>> 0) ? 1 : 0);
t1l += krl;
t1h += krh + ((t1l >>> 0) < (krl >>> 0) ? 1 : 0);
t1l = t1l + wrl|0; // FF32..FF34 perf issue https://bugzilla.mozilla.org/show_bug.cgi?id=1054972
t1h += wrh + ((t1l >>> 0) < (wrl >>> 0) ? 1 : 0);
// t2 = sigma0 + maj
var t2l = sigma0l + majl;
var t2h = sigma0h + majh + ((t2l >>> 0) < (sigma0l >>> 0) ? 1 : 0);
// Update working variables
hh = gh;
hl = gl;
gh = fh;
gl = fl;
fh = eh;
fl = el;
el = (dl + t1l) | 0;
eh = (dh + t1h + ((el >>> 0) < (dl >>> 0) ? 1 : 0)) | 0;
dh = ch;
dl = cl;
ch = bh;
cl = bl;
bh = ah;
bl = al;
al = (t1l + t2l) | 0;
ah = (t1h + t2h + ((al >>> 0) < (t1l >>> 0) ? 1 : 0)) | 0;
}
// Intermediate hash
h0l = h[1] = (h0l + al) | 0;
h[0] = (h0h + ah + ((h0l >>> 0) < (al >>> 0) ? 1 : 0)) | 0;
h1l = h[3] = (h1l + bl) | 0;
h[2] = (h1h + bh + ((h1l >>> 0) < (bl >>> 0) ? 1 : 0)) | 0;
h2l = h[5] = (h2l + cl) | 0;
h[4] = (h2h + ch + ((h2l >>> 0) < (cl >>> 0) ? 1 : 0)) | 0;
h3l = h[7] = (h3l + dl) | 0;
h[6] = (h3h + dh + ((h3l >>> 0) < (dl >>> 0) ? 1 : 0)) | 0;
h4l = h[9] = (h4l + el) | 0;
h[8] = (h4h + eh + ((h4l >>> 0) < (el >>> 0) ? 1 : 0)) | 0;
h5l = h[11] = (h5l + fl) | 0;
h[10] = (h5h + fh + ((h5l >>> 0) < (fl >>> 0) ? 1 : 0)) | 0;
h6l = h[13] = (h6l + gl) | 0;
h[12] = (h6h + gh + ((h6l >>> 0) < (gl >>> 0) ? 1 : 0)) | 0;
h7l = h[15] = (h7l + hl) | 0;
h[14] = (h7h + hh + ((h7l >>> 0) < (hl >>> 0) ? 1 : 0)) | 0;
}
};
//// hmac.js
/** @fileOverview HMAC implementation.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/** HMAC with the specified hash function.
* @constructor
* @param {bitArray} key the key for HMAC.
* @param {Object} [hash=sjcl.hash.sha256] The hash function to use.
*/
sjcl.misc.hmac = function (key, Hash) {
this._hash = Hash = Hash || sjcl.hash.sha256;
var exKey = [[],[]], i,
bs = Hash.prototype.blockSize / 32;
this._baseHash = [new Hash(), new Hash()];
if (key.length > bs) {
key = Hash.hash(key);
}
for (i=0; i<bs; i++) {
exKey[0][i] = key[i]^0x36363636;
exKey[1][i] = key[i]^0x5C5C5C5C;
}
this._baseHash[0].update(exKey[0]);
this._baseHash[1].update(exKey[1]);
this._resultHash = new Hash(this._baseHash[0]);
};
/** HMAC with the specified hash function. Also called encrypt since it's a prf.
* @param {bitArray|String} data The data to mac.
*/
sjcl.misc.hmac.prototype.encrypt = sjcl.misc.hmac.prototype.mac = function (data) {
if (!this._updated) {
this.update(data);
return this.digest(data);
} else {
throw new sjcl.exception.invalid("encrypt on already updated hmac called!");
}
};
sjcl.misc.hmac.prototype.reset = function () {
this._resultHash = new this._hash(this._baseHash[0]);
this._updated = false;
};
sjcl.misc.hmac.prototype.update = function (data) {
this._updated = true;
this._resultHash.update(data);
};
sjcl.misc.hmac.prototype.digest = function () {
var w = this._resultHash.finalize(), result = new (this._hash)(this._baseHash[1]).update(w).finalize();
this.reset();
return result;
};
//// pbkdf2.js
/** @fileOverview Password-based key-derivation function, version 2.0.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/** Password-Based Key-Derivation Function, version 2.0.
*
* Generate keys from passwords using PBKDF2-HMAC-SHA256.
*
* This is the method specified by RSA's PKCS #5 standard.
*
* @param {bitArray|String} password The password.
* @param {bitArray|String} salt The salt. Should have lots of entropy.
* @param {Number} [count=1000] The number of iterations. Higher numbers make the function slower but more secure.
* @param {Number} [length] The length of the derived key. Defaults to the
output size of the hash function.
* @param {Object} [Prff=sjcl.misc.hmac] The pseudorandom function family.
* @return {bitArray} the derived key.
*/
sjcl.misc.pbkdf2 = function (password, salt, count, length, Prff) {
count = count || 1000;
if (length < 0 || count < 0) {
throw sjcl.exception.invalid("invalid params to pbkdf2");
}
if (typeof password === "string") {
password = sjcl.codec.utf8String.toBits(password);
}
if (typeof salt === "string") {
salt = sjcl.codec.utf8String.toBits(salt);
}
Prff = Prff || sjcl.misc.hmac;
var prf = new Prff(password),
u, ui, i, j, k, out = [], b = sjcl.bitArray;
for (k = 1; 32 * out.length < (length || 1); k++) {
u = ui = prf.encrypt(b.concat(salt,[k]));
for (i=1; i<count; i++) {
ui = prf.encrypt(ui);
for (j=0; j<ui.length; j++) {
u[j] ^= ui[j];
}
}
out = out.concat(u);
}
if (length) { out = b.clamp(out, length); }
return out;
};
//// sha256.js
/** @fileOverview Javascript SHA-256 implementation.
*
* An older version of this implementation is available in the public
* domain, but this one is (c) Emily Stark, Mike Hamburg, Dan Boneh,
* Stanford University 2008-2010 and BSD-licensed for liability
* reasons.
*
* Special thanks to Aldo Cortesi for pointing out several bugs in
* this code.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/**
* Context for a SHA-256 operation in progress.
* @constructor
* @class Secure Hash Algorithm, 256 bits.
*/
sjcl.hash.sha256 = function (hash) {
if (!this._key[0]) { this._precompute(); }
if (hash) {
this._h = hash._h.slice(0);
this._buffer = hash._buffer.slice(0);
this._length = hash._length;
} else {
this.reset();
}
};
/**
* Hash a string or an array of words.
* @static
* @param {bitArray|String} data the data to hash.
* @return {bitArray} The hash value, an array of 16 big-endian words.
*/
sjcl.hash.sha256.hash = function (data) {
return (new sjcl.hash.sha256()).update(data).finalize();
};
sjcl.hash.sha256.prototype = {
/**
* The hash's block size, in bits.
* @constant
*/
blockSize: 512,
/**
* Reset the hash state.
* @return this
*/
reset:function () {
this._h = this._init.slice(0);
this._buffer = [];
this._length = 0;
return this;
},
/**
* Input several words to the hash.
* @param {bitArray|String} data the data to hash.
* @return this
*/
update: function (data) {
if (typeof data === "string") {
data = sjcl.codec.utf8String.toBits(data);
}
var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
ol = this._length,
nl = this._length = ol + sjcl.bitArray.bitLength(data);
for (i = 512+ol & -512; i <= nl; i+= 512) {
this._block(b.splice(0,16));
}
return this;
},
/**
* Complete hashing and output the hash value.
* @return {bitArray} The hash value, an array of 8 big-endian words.
*/
finalize:function () {
var i, b = this._buffer, h = this._h;
// Round out and push the buffer
b = sjcl.bitArray.concat(b, [sjcl.bitArray.partial(1,1)]);
// Round out the buffer to a multiple of 16 words, less the 2 length words.
for (i = b.length + 2; i & 15; i++) {
b.push(0);
}
// append the length
b.push(Math.floor(this._length / 0x100000000));
b.push(this._length | 0);
while (b.length) {
this._block(b.splice(0,16));
}
this.reset();
return h;
},
/**
* The SHA-256 initialization vector, to be precomputed.
* @private
*/
_init:[],
/*
_init:[0x6a09e667,0xbb67ae85,0x3c6ef372,0xa54ff53a,0x510e527f,0x9b05688c,0x1f83d9ab,0x5be0cd19],
*/
/**
* The SHA-256 hash key, to be precomputed.
* @private
*/
_key:[],
/*
_key:
[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],
*/
/**
* Function to precompute _init and _key.
* @private
*/
_precompute: function () {
var i = 0, prime = 2, factor;
function frac(x) { return (x-Math.floor(x)) * 0x100000000 | 0; }
outer: for (; i<64; prime++) {
for (factor=2; factor*factor <= prime; factor++) {
if (prime % factor === 0) {
// not a prime
continue outer;
}
}
if (i<8) {
this._init[i] = frac(Math.pow(prime, 1/2));
}
this._key[i] = frac(Math.pow(prime, 1/3));
i++;
}
},
/**
* Perform one cycle of SHA-256.
* @param {bitArray} words one block of words.
* @private
*/
_block:function (words) {
var i, tmp, a, b,
w = words.slice(0),
h = this._h,
k = this._key,
h0 = h[0], h1 = h[1], h2 = h[2], h3 = h[3],
h4 = h[4], h5 = h[5], h6 = h[6], h7 = h[7];
/* Rationale for placement of |0 :
* If a value can overflow is original 32 bits by a factor of more than a few
* million (2^23 ish), there is a possibility that it might overflow the
* 53-bit mantissa and lose precision.
*
* To avoid this, we clamp back to 32 bits by |'ing with 0 on any value that
* propagates around the loop, and on the hash state h[]. I don't believe
* that the clamps on h4 and on h0 are strictly necessary, but it's close
* (for h4 anyway), and better safe than sorry.
*
* The clamps on h[] are necessary for the output to be correct even in the
* common case and for short inputs.
*/
for (i=0; i<64; i++) {
// load up the input word for this round
if (i<16) {
tmp = w[i];
} else {
a = w[(i+1 ) & 15];
b = w[(i+14) & 15];
tmp = w[i&15] = ((a>>>7 ^ a>>>18 ^ a>>>3 ^ a<<25 ^ a<<14) +
(b>>>17 ^ b>>>19 ^ b>>>10 ^ b<<15 ^ b<<13) +
w[i&15] + w[(i+9) & 15]) | 0;
}
tmp = (tmp + h7 + (h4>>>6 ^ h4>>>11 ^ h4>>>25 ^ h4<<26 ^ h4<<21 ^ h4<<7) + (h6 ^ h4&(h5^h6)) + k[i]); // | 0;
// shift register
h7 = h6; h6 = h5; h5 = h4;
h4 = h3 + tmp | 0;
h3 = h2; h2 = h1; h1 = h0;
h0 = (tmp + ((h1&h2) ^ (h3&(h1^h2))) + (h1>>>2 ^ h1>>>13 ^ h1>>>22 ^ h1<<30 ^ h1<<19 ^ h1<<10)) | 0;
}
h[0] = h[0]+h0 | 0;
h[1] = h[1]+h1 | 0;
h[2] = h[2]+h2 | 0;
h[3] = h[3]+h3 | 0;
h[4] = h[4]+h4 | 0;
h[5] = h[5]+h5 | 0;
h[6] = h[6]+h6 | 0;
h[7] = h[7]+h7 | 0;
}
};
