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Grégory Soutadé
2013-10-09 20:47:43 +02:00
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/*
* jsaes version 0.1 - Copyright 2006 B. Poettering
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
/*
* http://point-at-infinity.org/jsaes/
*
* This is a javascript implementation of the AES block cipher. Key lengths
* of 128, 192 and 256 bits are supported.
*
* The well-functioning of the encryption/decryption routines has been
* verified for different key lengths with the test vectors given in
* FIPS-197, Appendix C.
*
* The following code example enciphers the plaintext block '00 11 22 .. EE FF'
* with the 256 bit key '00 01 02 .. 1E 1F'.
*
* AES_Init();
*
* var block = new Array(16);
* for(var i = 0; i < 16; i++)
* block[i] = 0x11 * i;
*
* var key = new Array(32);
* for(var i = 0; i < 32; i++)
* key[i] = i;
*
* AES_ExpandKey(key);
* AES_Encrypt(block, key);
*
* AES_Done();
*
* Report bugs to: jsaes AT point-at-infinity.org
*
*/
/******************************************************************************/
/*
AES_Init: initialize the tables needed at runtime. Call this function
before the (first) key expansion.
*/
function AES_Init() {
AES_Sbox_Inv = new Array(256);
for(var i = 0; i < 256; i++)
AES_Sbox_Inv[AES_Sbox[i]] = i;
AES_ShiftRowTab_Inv = new Array(16);
for(var i = 0; i < 16; i++)
AES_ShiftRowTab_Inv[AES_ShiftRowTab[i]] = i;
AES_xtime = new Array(256);
for(var i = 0; i < 128; i++) {
AES_xtime[i] = i << 1;
AES_xtime[128 + i] = (i << 1) ^ 0x1b;
}
}
/*
AES_Done: release memory reserved by AES_Init. Call this function after
the last encryption/decryption operation.
*/
function AES_Done() {
delete AES_Sbox_Inv;
delete AES_ShiftRowTab_Inv;
delete AES_xtime;
}
/*
AES_ExpandKey: expand a cipher key. Depending on the desired encryption
strength of 128, 192 or 256 bits 'key' has to be a byte array of length
16, 24 or 32, respectively. The key expansion is done "in place", meaning
that the array 'key' is modified.
*/
function AES_ExpandKey(key) {
var kl = key.length, ks, Rcon = 1;
switch (kl) {
case 16: ks = 16 * (10 + 1); break;
case 24: ks = 16 * (12 + 1); break;
case 32: ks = 16 * (14 + 1); break;
default:
alert("AES_ExpandKey: Only key lengths of 16, 24 or 32 bytes allowed!");
}
for(var i = kl; i < ks; i += 4) {
var temp = key.slice(i - 4, i);
if (i % kl == 0) {
temp = new Array(AES_Sbox[temp[1]] ^ Rcon, AES_Sbox[temp[2]],
AES_Sbox[temp[3]], AES_Sbox[temp[0]]);
if ((Rcon <<= 1) >= 256)
Rcon ^= 0x11b;
}
else if ((kl > 24) && (i % kl == 16))
temp = new Array(AES_Sbox[temp[0]], AES_Sbox[temp[1]],
AES_Sbox[temp[2]], AES_Sbox[temp[3]]);
for(var j = 0; j < 4; j++)
key[i + j] = key[i + j - kl] ^ temp[j];
}
}
/*
AES_Encrypt: encrypt the 16 byte array 'block' with the previously
expanded key 'key'.
*/
function AES_Encrypt(block, key) {
var l = key.length;
AES_AddRoundKey(block, key.slice(0, 16));
for(var i = 16; i < l - 16; i += 16) {
AES_SubBytes(block, AES_Sbox);
AES_ShiftRows(block, AES_ShiftRowTab);
AES_MixColumns(block);
AES_AddRoundKey(block, key.slice(i, i + 16));
}
AES_SubBytes(block, AES_Sbox);
AES_ShiftRows(block, AES_ShiftRowTab);
AES_AddRoundKey(block, key.slice(i, l));
}
/*
AES_Decrypt: decrypt the 16 byte array 'block' with the previously
expanded key 'key'.
*/
function AES_Decrypt(block, key) {
var l = key.length;
AES_AddRoundKey(block, key.slice(l - 16, l));
AES_ShiftRows(block, AES_ShiftRowTab_Inv);
AES_SubBytes(block, AES_Sbox_Inv);
for(var i = l - 32; i >= 16; i -= 16) {
AES_AddRoundKey(block, key.slice(i, i + 16));
AES_MixColumns_Inv(block);
AES_ShiftRows(block, AES_ShiftRowTab_Inv);
AES_SubBytes(block, AES_Sbox_Inv);
}
AES_AddRoundKey(block, key.slice(0, 16));
}
/******************************************************************************/
/* The following lookup tables and functions are for internal use only! */
AES_Sbox = new Array(99,124,119,123,242,107,111,197,48,1,103,43,254,215,171,
118,202,130,201,125,250,89,71,240,173,212,162,175,156,164,114,192,183,253,
147,38,54,63,247,204,52,165,229,241,113,216,49,21,4,199,35,195,24,150,5,154,
7,18,128,226,235,39,178,117,9,131,44,26,27,110,90,160,82,59,214,179,41,227,
47,132,83,209,0,237,32,252,177,91,106,203,190,57,74,76,88,207,208,239,170,
251,67,77,51,133,69,249,2,127,80,60,159,168,81,163,64,143,146,157,56,245,
188,182,218,33,16,255,243,210,205,12,19,236,95,151,68,23,196,167,126,61,
100,93,25,115,96,129,79,220,34,42,144,136,70,238,184,20,222,94,11,219,224,
50,58,10,73,6,36,92,194,211,172,98,145,149,228,121,231,200,55,109,141,213,
78,169,108,86,244,234,101,122,174,8,186,120,37,46,28,166,180,198,232,221,
116,31,75,189,139,138,112,62,181,102,72,3,246,14,97,53,87,185,134,193,29,
158,225,248,152,17,105,217,142,148,155,30,135,233,206,85,40,223,140,161,
137,13,191,230,66,104,65,153,45,15,176,84,187,22);
AES_ShiftRowTab = new Array(0,5,10,15,4,9,14,3,8,13,2,7,12,1,6,11);
function AES_SubBytes(state, sbox) {
for(var i = 0; i < 16; i++)
state[i] = sbox[state[i]];
}
function AES_AddRoundKey(state, rkey) {
for(var i = 0; i < 16; i++)
state[i] ^= rkey[i];
}
function AES_ShiftRows(state, shifttab) {
var h = new Array().concat(state);
for(var i = 0; i < 16; i++)
state[i] = h[shifttab[i]];
}
function AES_MixColumns(state) {
for(var i = 0; i < 16; i += 4) {
var s0 = state[i + 0], s1 = state[i + 1];
var s2 = state[i + 2], s3 = state[i + 3];
var h = s0 ^ s1 ^ s2 ^ s3;
state[i + 0] ^= h ^ AES_xtime[s0 ^ s1];
state[i + 1] ^= h ^ AES_xtime[s1 ^ s2];
state[i + 2] ^= h ^ AES_xtime[s2 ^ s3];
state[i + 3] ^= h ^ AES_xtime[s3 ^ s0];
}
}
function AES_MixColumns_Inv(state) {
for(var i = 0; i < 16; i += 4) {
var s0 = state[i + 0], s1 = state[i + 1];
var s2 = state[i + 2], s3 = state[i + 3];
var h = s0 ^ s1 ^ s2 ^ s3;
var xh = AES_xtime[h];
var h1 = AES_xtime[AES_xtime[xh ^ s0 ^ s2]] ^ h;
var h2 = AES_xtime[AES_xtime[xh ^ s1 ^ s3]] ^ h;
state[i + 0] ^= h1 ^ AES_xtime[s0 ^ s1];
state[i + 1] ^= h2 ^ AES_xtime[s1 ^ s2];
state[i + 2] ^= h1 ^ AES_xtime[s2 ^ s3];
state[i + 3] ^= h2 ^ AES_xtime[s3 ^ s0];
}
}
function bin2String (array) {
var result = "";
for (var i = 0; i < array.length; i++) {
result += String.fromCharCode(parseInt(array[i], 2));
}
return result;
}
function string2Bin (str) {
var result = [];
for (var i = 0; i < str.length; i++) {
result.push(str.charCodeAt(i));
}
while ((result.length % 16))
result.push(0);
return result;
}
function bin2String (array) {
return String.fromCharCode.apply(String, array);
}
// http://osama-oransa.blogspot.fr/2012/03/using-aes-encrypting-in-java-script.html
exports.aes = {
init : function (myKey){
AES_Init();
var key = string2Bin(myKey);
AES_ExpandKey(key);
return key;
},
encrypt : function ( inputStr,key ) {
var block = string2Bin(inputStr);
AES_Encrypt(block, key);
var data=bin2String(block);
return data;
},
decrypt : function ( inputStr,key ) {
block = string2Bin(inputStr);
AES_Decrypt(block, key);
var data=bin2String(block);
return data;
},
encryptLongString : function( myString,key ) {
if(myString.length>16){
var data='';
for(var i=0;i<myString.length;i=i+16){
data+=this.encrypt(myString.substr(i,16),key);
}
return data;
}else{
return this.encrypt(myString,key);
}
},
decryptLongString : function ( myString,key ) {
if(myString.length>16){
var data='';
for(var i=0;i<myString.length;i=i+16){
data+=this.decrypt(myString.substr(i,16),key);
}
return data;
}else{
return this.decrypt(myString,key);
}
},
finish : function(){
AES_Done();
},
};

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/**
* @license jahashtable, a JavaScript implementation of a hash table. It creates a single constructor function called
* Hashtable in the global scope.
*
* http://www.timdown.co.uk/jshashtable/
* Copyright 2013 Tim Down.
* Version: 3.0
* Build date: 17 July 2013
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var Hashtable = (function(UNDEFINED) {
var FUNCTION = "function", STRING = "string", UNDEF = "undefined";
// Require Array.prototype.splice, Object.prototype.hasOwnProperty and encodeURIComponent. In environments not
// having these (e.g. IE <= 5), we bail out now and leave Hashtable null.
if (typeof encodeURIComponent == UNDEF ||
Array.prototype.splice === UNDEFINED ||
Object.prototype.hasOwnProperty === UNDEFINED) {
return null;
}
function toStr(obj) {
return (typeof obj == STRING) ? obj : "" + obj;
}
function hashObject(obj) {
var hashCode;
if (typeof obj == STRING) {
return obj;
} else if (typeof obj.hashCode == FUNCTION) {
// Check the hashCode method really has returned a string
hashCode = obj.hashCode();
return (typeof hashCode == STRING) ? hashCode : hashObject(hashCode);
} else {
return toStr(obj);
}
}
function merge(o1, o2) {
for (var i in o2) {
if (o2.hasOwnProperty(i)) {
o1[i] = o2[i];
}
}
}
function equals_fixedValueHasEquals(fixedValue, variableValue) {
return fixedValue.equals(variableValue);
}
function equals_fixedValueNoEquals(fixedValue, variableValue) {
return (typeof variableValue.equals == FUNCTION) ?
variableValue.equals(fixedValue) : (fixedValue === variableValue);
}
function createKeyValCheck(kvStr) {
return function(kv) {
if (kv === null) {
throw new Error("null is not a valid " + kvStr);
} else if (kv === UNDEFINED) {
throw new Error(kvStr + " must not be undefined");
}
};
}
var checkKey = createKeyValCheck("key"), checkValue = createKeyValCheck("value");
/*----------------------------------------------------------------------------------------------------------------*/
function Bucket(hash, firstKey, firstValue, equalityFunction) {
this[0] = hash;
this.entries = [];
this.addEntry(firstKey, firstValue);
if (equalityFunction !== null) {
this.getEqualityFunction = function() {
return equalityFunction;
};
}
}
var EXISTENCE = 0, ENTRY = 1, ENTRY_INDEX_AND_VALUE = 2;
function createBucketSearcher(mode) {
return function(key) {
var i = this.entries.length, entry, equals = this.getEqualityFunction(key);
while (i--) {
entry = this.entries[i];
if ( equals(key, entry[0]) ) {
switch (mode) {
case EXISTENCE:
return true;
case ENTRY:
return entry;
case ENTRY_INDEX_AND_VALUE:
return [ i, entry[1] ];
}
}
}
return false;
};
}
function createBucketLister(entryProperty) {
return function(aggregatedArr) {
var startIndex = aggregatedArr.length;
for (var i = 0, entries = this.entries, len = entries.length; i < len; ++i) {
aggregatedArr[startIndex + i] = entries[i][entryProperty];
}
};
}
Bucket.prototype = {
getEqualityFunction: function(searchValue) {
return (typeof searchValue.equals == FUNCTION) ? equals_fixedValueHasEquals : equals_fixedValueNoEquals;
},
getEntryForKey: createBucketSearcher(ENTRY),
getEntryAndIndexForKey: createBucketSearcher(ENTRY_INDEX_AND_VALUE),
removeEntryForKey: function(key) {
var result = this.getEntryAndIndexForKey(key);
if (result) {
this.entries.splice(result[0], 1);
return result[1];
}
return null;
},
addEntry: function(key, value) {
this.entries.push( [key, value] );
},
keys: createBucketLister(0),
values: createBucketLister(1),
getEntries: function(destEntries) {
var startIndex = destEntries.length;
for (var i = 0, entries = this.entries, len = entries.length; i < len; ++i) {
// Clone the entry stored in the bucket before adding to array
destEntries[startIndex + i] = entries[i].slice(0);
}
},
containsKey: createBucketSearcher(EXISTENCE),
containsValue: function(value) {
var entries = this.entries, i = entries.length;
while (i--) {
if ( value === entries[i][1] ) {
return true;
}
}
return false;
}
};
/*----------------------------------------------------------------------------------------------------------------*/
// Supporting functions for searching hashtable buckets
function searchBuckets(buckets, hash) {
var i = buckets.length, bucket;
while (i--) {
bucket = buckets[i];
if (hash === bucket[0]) {
return i;
}
}
return null;
}
function getBucketForHash(bucketsByHash, hash) {
var bucket = bucketsByHash[hash];
// Check that this is a genuine bucket and not something inherited from the bucketsByHash's prototype
return ( bucket && (bucket instanceof Bucket) ) ? bucket : null;
}
/*----------------------------------------------------------------------------------------------------------------*/
function Hashtable() {
var buckets = [];
var bucketsByHash = {};
var properties = {
replaceDuplicateKey: true,
hashCode: hashObject,
equals: null
};
var arg0 = arguments[0], arg1 = arguments[1];
if (arg1 !== UNDEFINED) {
properties.hashCode = arg0;
properties.equals = arg1;
} else if (arg0 !== UNDEFINED) {
merge(properties, arg0);
}
var hashCode = properties.hashCode, equals = properties.equals;
this.properties = properties;
this.put = function(key, value) {
checkKey(key);
checkValue(value);
var hash = hashCode(key), bucket, bucketEntry, oldValue = null;
// Check if a bucket exists for the bucket key
bucket = getBucketForHash(bucketsByHash, hash);
if (bucket) {
// Check this bucket to see if it already contains this key
bucketEntry = bucket.getEntryForKey(key);
if (bucketEntry) {
// This bucket entry is the current mapping of key to value, so replace the old value.
// Also, we optionally replace the key so that the latest key is stored.
if (properties.replaceDuplicateKey) {
bucketEntry[0] = key;
}
oldValue = bucketEntry[1];
bucketEntry[1] = value;
} else {
// The bucket does not contain an entry for this key, so add one
bucket.addEntry(key, value);
}
} else {
// No bucket exists for the key, so create one and put our key/value mapping in
bucket = new Bucket(hash, key, value, equals);
buckets.push(bucket);
bucketsByHash[hash] = bucket;
}
return oldValue;
};
this.get = function(key) {
checkKey(key);
var hash = hashCode(key);
// Check if a bucket exists for the bucket key
var bucket = getBucketForHash(bucketsByHash, hash);
if (bucket) {
// Check this bucket to see if it contains this key
var bucketEntry = bucket.getEntryForKey(key);
if (bucketEntry) {
// This bucket entry is the current mapping of key to value, so return the value.
return bucketEntry[1];
}
}
return null;
};
this.containsKey = function(key) {
checkKey(key);
var bucketKey = hashCode(key);
// Check if a bucket exists for the bucket key
var bucket = getBucketForHash(bucketsByHash, bucketKey);
return bucket ? bucket.containsKey(key) : false;
};
this.containsValue = function(value) {
checkValue(value);
var i = buckets.length;
while (i--) {
if (buckets[i].containsValue(value)) {
return true;
}
}
return false;
};
this.clear = function() {
buckets.length = 0;
bucketsByHash = {};
};
this.isEmpty = function() {
return !buckets.length;
};
var createBucketAggregator = function(bucketFuncName) {
return function() {
var aggregated = [], i = buckets.length;
while (i--) {
buckets[i][bucketFuncName](aggregated);
}
return aggregated;
};
};
this.keys = createBucketAggregator("keys");
this.values = createBucketAggregator("values");
this.entries = createBucketAggregator("getEntries");
this.remove = function(key) {
checkKey(key);
var hash = hashCode(key), bucketIndex, oldValue = null;
// Check if a bucket exists for the bucket key
var bucket = getBucketForHash(bucketsByHash, hash);
if (bucket) {
// Remove entry from this bucket for this key
oldValue = bucket.removeEntryForKey(key);
if (oldValue !== null) {
// Entry was removed, so check if bucket is empty
if (bucket.entries.length == 0) {
// Bucket is empty, so remove it from the bucket collections
bucketIndex = searchBuckets(buckets, hash);
buckets.splice(bucketIndex, 1);
delete bucketsByHash[hash];
}
}
}
return oldValue;
};
this.size = function() {
var total = 0, i = buckets.length;
while (i--) {
total += buckets[i].entries.length;
}
return total;
};
}
Hashtable.prototype = {
each: function(callback) {
var entries = this.entries(), i = entries.length, entry;
while (i--) {
entry = entries[i];
callback(entry[0], entry[1]);
}
},
equals: function(hashtable) {
var keys, key, val, count = this.size();
if (count == hashtable.size()) {
keys = this.keys();
while (count--) {
key = keys[count];
val = hashtable.get(key);
if (val === null || val !== this.get(key)) {
return false;
}
}
return true;
}
return false;
},
putAll: function(hashtable, conflictCallback) {
var entries = hashtable.entries();
var entry, key, value, thisValue, i = entries.length;
var hasConflictCallback = (typeof conflictCallback == FUNCTION);
while (i--) {
entry = entries[i];
key = entry[0];
value = entry[1];
// Check for a conflict. The default behaviour is to overwrite the value for an existing key
if ( hasConflictCallback && (thisValue = this.get(key)) ) {
value = conflictCallback(key, thisValue, value);
}
this.put(key, value);
}
},
clone: function() {
var clone = new Hashtable(this.properties);
clone.putAll(this);
return clone;
}
};
Hashtable.prototype.toQueryString = function() {
var entries = this.entries(), i = entries.length, entry;
var parts = [];
while (i--) {
entry = entries[i];
parts[i] = encodeURIComponent( toStr(entry[0]) ) + "=" + encodeURIComponent( toStr(entry[1]) );
}
return parts.join("&");
};
return Hashtable;
})();
exports.Hashtable = Hashtable;

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/*
* A JavaScript implementation of the SHA256 hash function.
*
* FILE: sha256.js
* VERSION: 0.8
* AUTHOR: Christoph Bichlmeier <informatik@zombiearena.de>
*
* NOTE: This version is not tested thoroughly!
*
* Copyright (c) 2003, Christoph Bichlmeier
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* ======================================================================
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* SHA256 logical functions */
function rotateRight(n,x) {
return ((x >>> n) | (x << (32 - n)));
}
function choice(x,y,z) {
return ((x & y) ^ (~x & z));
}
function majority(x,y,z) {
return ((x & y) ^ (x & z) ^ (y & z));
}
function sha256_Sigma0(x) {
return (rotateRight(2, x) ^ rotateRight(13, x) ^ rotateRight(22, x));
}
function sha256_Sigma1(x) {
return (rotateRight(6, x) ^ rotateRight(11, x) ^ rotateRight(25, x));
}
function sha256_sigma0(x) {
return (rotateRight(7, x) ^ rotateRight(18, x) ^ (x >>> 3));
}
function sha256_sigma1(x) {
return (rotateRight(17, x) ^ rotateRight(19, x) ^ (x >>> 10));
}
function sha256_expand(W, j) {
return (W[j&0x0f] += sha256_sigma1(W[(j+14)&0x0f]) + W[(j+9)&0x0f] +
sha256_sigma0(W[(j+1)&0x0f]));
}
/* Hash constant words K: */
var K256 = new Array(
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
);
/* global arrays */
var ihash, count, buffer;
var sha256_hex_digits = "0123456789abcdef";
/* Add 32-bit integers with 16-bit operations (bug in some JS-interpreters:
overflow) */
function safe_add(x, y)
{
var lsw = (x & 0xffff) + (y & 0xffff);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xffff);
}
/* Initialise the SHA256 computation */
function sha256_init() {
ihash = new Array(8);
count = new Array(2);
buffer = new Array(64);
count[0] = count[1] = 0;
ihash[0] = 0x6a09e667;
ihash[1] = 0xbb67ae85;
ihash[2] = 0x3c6ef372;
ihash[3] = 0xa54ff53a;
ihash[4] = 0x510e527f;
ihash[5] = 0x9b05688c;
ihash[6] = 0x1f83d9ab;
ihash[7] = 0x5be0cd19;
}
/* Transform a 512-bit message block */
function sha256_transform() {
var a, b, c, d, e, f, g, h, T1, T2;
var W = new Array(16);
/* Initialize registers with the previous intermediate value */
a = ihash[0];
b = ihash[1];
c = ihash[2];
d = ihash[3];
e = ihash[4];
f = ihash[5];
g = ihash[6];
h = ihash[7];
/* make 32-bit words */
for(var i=0; i<16; i++)
W[i] = ((buffer[(i<<2)+3]) | (buffer[(i<<2)+2] << 8) | (buffer[(i<<2)+1]
<< 16) | (buffer[i<<2] << 24));
for(var j=0; j<64; j++) {
T1 = h + sha256_Sigma1(e) + choice(e, f, g) + K256[j];
if(j < 16) T1 += W[j];
else T1 += sha256_expand(W, j);
T2 = sha256_Sigma0(a) + majority(a, b, c);
h = g;
g = f;
f = e;
e = safe_add(d, T1);
d = c;
c = b;
b = a;
a = safe_add(T1, T2);
}
/* Compute the current intermediate hash value */
ihash[0] += a;
ihash[1] += b;
ihash[2] += c;
ihash[3] += d;
ihash[4] += e;
ihash[5] += f;
ihash[6] += g;
ihash[7] += h;
}
/* Read the next chunk of data and update the SHA256 computation */
function sha256_update(data, inputLen) {
var i, index, curpos = 0;
/* Compute number of bytes mod 64 */
index = ((count[0] >> 3) & 0x3f);
var remainder = (inputLen & 0x3f);
/* Update number of bits */
if ((count[0] += (inputLen << 3)) < (inputLen << 3)) count[1]++;
count[1] += (inputLen >> 29);
/* Transform as many times as possible */
for(i=0; i+63<inputLen; i+=64) {
for(var j=index; j<64; j++)
buffer[j] = data.charCodeAt(curpos++);
sha256_transform();
index = 0;
}
/* Buffer remaining input */
for(var j=0; j<remainder; j++)
buffer[j] = data.charCodeAt(curpos++);
}
/* Finish the computation by operations such as padding */
function sha256_final() {
var index = ((count[0] >> 3) & 0x3f);
buffer[index++] = 0x80;
if(index <= 56) {
for(var i=index; i<56; i++)
buffer[i] = 0;
} else {
for(var i=index; i<64; i++)
buffer[i] = 0;
sha256_transform();
for(var i=0; i<56; i++)
buffer[i] = 0;
}
buffer[56] = (count[1] >>> 24) & 0xff;
buffer[57] = (count[1] >>> 16) & 0xff;
buffer[58] = (count[1] >>> 8) & 0xff;
buffer[59] = count[1] & 0xff;
buffer[60] = (count[0] >>> 24) & 0xff;
buffer[61] = (count[0] >>> 16) & 0xff;
buffer[62] = (count[0] >>> 8) & 0xff;
buffer[63] = count[0] & 0xff;
sha256_transform();
}
/* Split the internal hash values into an array of bytes */
function sha256_encode_bytes() {
var j=0;
var output = new Array(32);
for(var i=0; i<8; i++) {
output[j++] = ((ihash[i] >>> 24) & 0xff);
output[j++] = ((ihash[i] >>> 16) & 0xff);
output[j++] = ((ihash[i] >>> 8) & 0xff);
output[j++] = (ihash[i] & 0xff);
}
return output;
}
/* Get the internal hash as a hex string */
function sha256_encode_hex() {
var output = new String();
for(var i=0; i<8; i++) {
for(var j=28; j>=0; j-=4)
output += sha256_hex_digits.charAt((ihash[i] >>> j) & 0x0f);
}
return output;
}
/* Main function: returns a hex string representing the SHA256 value of the
given data */
exports.sha256 = {
digest : function (data) {
sha256_init();
sha256_update(data, data.length);
sha256_final();
return sha256_encode_hex();
}
};
/* test if the JS-interpreter is working properly */
function sha256_self_test()
{
return sha256_digest("message digest") ==
"f7846f55cf23e14eebeab5b4e1550cad5b509e3348fbc4efa3a1413d393cb650";
}

203
firefox_addon/lib/main.js Normal file
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@@ -0,0 +1,203 @@
/*
Copyright (C) 2013 Grégory Soutadé
This file is part of gPass.
gPass is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
gPass is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with gPass. If not, see <http://www.gnu.org/licenses/>.
*/
var {Cc, Ci} = require("chrome");
var notifications = require("sdk/notifications");
// http://www.timdown.co.uk/jshashtable/
var Hashtable = require("jshashtable-3.0").Hashtable;
// http://code.google.com/p/crypto-js/
var sha256 = require("jssha256").sha256;
var aes = require("jsaes").aes;
var prefSet = require("simple-prefs");
// Global document
var doc;
var DEBUG = false;
// http://stackoverflow.com/questions/3745666/how-to-convert-from-hex-to-ascii-in-javascript
function hex2a(hex) {
var str = '';
for (var i = 0; i < hex.length; i += 2)
str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
return str;
}
function a2hex(str) {
var hex = '';
for (var i = 0; i < str.length; i++)
{
c = str.charCodeAt(i).toString(16);
if (c.length == 1) c = "0" + c;
hex += c;
}
return hex;
}
function debug(s)
{
if (DEBUG)
console.log(s);
}
function on_sumbit()
{
var form = this;
var fields = form.getElementsByTagName("input");
var my_map = new Hashtable();
domain = form.ownerDocument.domain;
// Get all <input type="text">
for (i=0; i<fields.length; i++)
{
var field = fields[i];
if (field.getAttribute("type") == "text")
{
if (field.hasAttribute("name"))
my_map.put(field.getAttribute("name"), field.value);
}
}
// Look for <input type="password" value="@@...">
for (i=0; i<fields.length; i++)
{
var field = fields[i];
if (field.getAttribute("type") == "password")
{
debug(field.value);
password = field.value;
if (password.indexOf("@@") != 0)
continue;
mkey = password.substring(2);
mkey = sha256.digest(mkey);
user = null;
// Subset of common user field
if (my_map.containsKey("user")) user = my_map.get("user");
else if (my_map.containsKey("usr")) user = my_map.get("usr");
else if (my_map.containsKey("username")) user = my_map.get("username");
else if (my_map.containsKey("login")) user = my_map.get("login");
// If no one found, use all
logins = (user != null) ? new Array(user) : my_map.values();
keys = "";
for(a=0; a<logins.length; a++)
{
v = "@@" + domain + ";" + logins[a];
debug("will encrypt " + v);
debug("with " + mkey);
enc = aes.encryptLongString(v, aes.init(hex2a(mkey)));
aes.finish();
debug("res " + enc);
keys += (keys.length != 0) ? "&" : "";
keys += "k" + a + "=" + a2hex(enc);
}
debug(keys);
// Need to do a synchronous request
var gPassRequest = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].
createInstance(Ci.nsIXMLHttpRequest);
var ret = true;
// gPassRequest.addEventListener("progress", function(evt) { ; }, false);
gPassRequest.addEventListener("load", function(evt) {
r = this.responseText.split("\n");
if (r[0] != "<end>" && r[0].startsWith("pass="))
{
ciphered_password = r[0].susbtr(5);
debug("Ciphered password : " + ciphered_password);
clear_password = aes.decryptLongString(hex2a(ciphered_password), aes.init(hex2a(mkey)));
aes.finish();
// Remove salt
clear_password = clear_password.replace(/\0*$/, "");
clear_password = clear_password.substr(0, clear_password.length-3);
debug("Clear password " + clear_password);
field.value = clear_password;
}
else
{
debug("No password found");
ret = false;
notifications.notify({
title: "gPasss",
text: "No password found in database",
data: "No password found in database",
});
}
}, false);
gPassRequest.addEventListener("error", function(evt) {
debug("error");
ret = false;
notifications.notify({
title: "gPasss",
text: "Error",
data: "Error",
});
}, false);
gPassRequest.open("POST", prefSet.prefs["account_url"], true);
gPassRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
gPassRequest.send(keys);
if (!ret) return ret;
}
}
}
function document_loaded(event)
{
// If there is a password in the form, add a "submit" listener
for(i=0; i<doc.document.forms.length; i++)
{
var form = doc.document.forms[i];
var fields = form.getElementsByTagName("input");
for (a=0; a<fields.length; a++)
{
var field = fields[a];
if (field.getAttribute("type") == "password")
{
form.addEventListener("submit", on_sumbit);
break;
}
}
}
}
var httpRequestObserver =
{
observe: function(subject, topic, data)
{
if (topic == "content-document-global-created")
{
doc = subject;
doc.addEventListener("DOMContentLoaded", document_loaded, false);
}
}
};
var observerService = Cc["@mozilla.org/observer-service;1"].getService(Ci.nsIObserverService);
observerService.addObserver(httpRequestObserver, "content-document-global-created", false);