77 lines
2.8 KiB
JavaScript
77 lines
2.8 KiB
JavaScript
/*
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* passy.js - implementation of passy algorithm in javascript, by Stephen Waits
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*
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* The MIT License
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*
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* Copyright (c) 2010 Stephen Waits <steve@waits.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*jslint onevar: true, undef: true, nomen: true, regexp: true, newcap: true, immed: true */
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/*
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* Given a "text" (i.e. "amazon.com") and a "secret" (i.e. "mypassword") return an
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* array of four Passy'fied passwords.
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*/
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var passy;
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passy = function(text, secret) {
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var encode, hex2passy, symtab;
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symtab = "ABCDEFGHabcdefgh23456789#$%*+=@?";
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hex2passy = function(x) {
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return symtab[parseInt(x, 16) % symtab.length];
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};
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encode = function(str) {
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var i;
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return ((function() {
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var _ref, _results;
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_results = [];
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for (i = 0, _ref = str.length; (0 <= _ref ? i < _ref : i > _ref); i += 2) {
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_results.push(hex2passy(str.substr(i, 2)));
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}
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return _results;
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})()).join("");
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};
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return [encode(SHA1.hmac(secret, text).substr(0, 24)), SHA1.hmac(secret, text).substr(0, 10)];
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};
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/* This is the source CoffeeScript code:
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passy = (text,secret) ->
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# our symbol table for passy
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symtab = "ABCDEFGHabcdefgh23456789#$%*+=@?"
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# convert a hex string to a single passy character
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# * modulo and lookup in symtab string
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hex2passy = (x) -> symtab[parseInt(x,16) % symtab.length]
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# encode a hex string into a passy string
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# 1. split a string into two character strings (octets)
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# 2. encode each two char string (octet) into a single passy char
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# 3. join resulting array of passy chars into a single passy string
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encode = (str) ->
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(hex2passy(str.substr(i,2)) for i in [0...str.length] by 2).join("")
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# return the first 12 characters of the passy string and 10 characters of hmac
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[encode(SHA1.hmac(secret,text).substr(0,24)), SHA1.hmac(secret,text).substr(0,10)]
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*/
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