mirror of
http://git.whoc.org.uk/git/password-manager.git
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332 lines
9.0 KiB
JavaScript
332 lines
9.0 KiB
JavaScript
/*
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Copyright 2008-2011 Clipperz Srl
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This file is part of Clipperz's Javascript Crypto Library.
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Javascript Crypto Library provides web developers with an extensive
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and efficient set of cryptographic functions. The library aims to
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obtain maximum execution speed while preserving modularity and
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reusability.
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For further information about its features and functionalities please
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refer to http://www.clipperz.com
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* Javascript Crypto Library is free software: you can redistribute
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it and/or modify it under the terms of the GNU Affero General Public
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License as published by the Free Software Foundation, either version
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3 of the License, or (at your option) any later version.
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* Javascript Crypto Library is distributed in the hope that it will
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be useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU Affero General Public
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License along with Javascript Crypto Library. If not, see
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<http://www.gnu.org/licenses/>.
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*/
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try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
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throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
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}
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try { if (typeof(Clipperz.Crypto.BigInt) == 'undefined') { throw ""; }} catch (e) {
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throw "Clipperz.Crypto.SRP depends on Clipperz.Crypto.BigInt!";
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}
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try { if (typeof(Clipperz.Crypto.PRNG) == 'undefined') { throw ""; }} catch (e) {
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throw "Clipperz.Crypto.SRP depends on Clipperz.Crypto.PRNG!";
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}
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if (typeof(Clipperz.Crypto.SRP) == 'undefined') { Clipperz.Crypto.SRP = {}; }
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Clipperz.Crypto.SRP.VERSION = "0.1";
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Clipperz.Crypto.SRP.NAME = "Clipperz.Crypto.SRP";
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//#############################################################################
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MochiKit.Base.update(Clipperz.Crypto.SRP, {
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'_n': null,
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'_g': null,
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//-------------------------------------------------------------------------
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'n': function() {
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if (Clipperz.Crypto.SRP._n == null) {
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Clipperz.Crypto.SRP._n = new Clipperz.Crypto.BigInt("115b8b692e0e045692cf280b436735c77a5a9e8a9e7ed56c965f87db5b2a2ece3", 16);
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}
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return Clipperz.Crypto.SRP._n;
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},
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//-------------------------------------------------------------------------
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'g': function() {
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if (Clipperz.Crypto.SRP._g == null) {
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Clipperz.Crypto.SRP._g = new Clipperz.Crypto.BigInt(2); // eventually 5 (as suggested on the Diffi-Helmann documentation)
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}
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return Clipperz.Crypto.SRP._g;
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},
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//-----------------------------------------------------------------------------
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'exception': {
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'InvalidValue': new MochiKit.Base.NamedError("Clipperz.Crypto.SRP.exception.InvalidValue")
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},
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//-------------------------------------------------------------------------
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__syntaxFix__: "syntax fix"
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});
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//#############################################################################
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//
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// S R P C o n n e c t i o n version 1.0
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//
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//=============================================================================
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Clipperz.Crypto.SRP.Connection = function (args) {
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args = args || {};
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this._C = args.C;
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this._P = args.P;
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this.hash = args.hash;
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this._a = null;
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this._A = null;
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this._s = null;
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this._B = null;
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this._x = null;
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this._u = null;
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this._K = null;
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this._M1 = null;
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this._M2 = null;
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this._sessionKey = null;
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return this;
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}
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Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
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'toString': function () {
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return "Clipperz.Crypto.SRP.Connection (username: " + this.username() + "). Status: " + this.statusDescription();
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},
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//-------------------------------------------------------------------------
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'C': function () {
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return this._C;
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},
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//-------------------------------------------------------------------------
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'P': function () {
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return this._P;
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},
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//-------------------------------------------------------------------------
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'a': function () {
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if (this._a == null) {
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this._a = new Clipperz.Crypto.BigInt(Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32).toHexString().substring(2), 16);
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// this._a = new Clipperz.Crypto.BigInt("37532428169486597638072888476611365392249575518156687476805936694442691012367", 10);
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//MochiKit.Logging.logDebug("SRP a: " + this._a);
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}
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return this._a;
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},
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//-------------------------------------------------------------------------
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'A': function () {
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if (this._A == null) {
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// Warning: this value should be strictly greater than zero: how should we perform this check?
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this._A = Clipperz.Crypto.SRP.g().powerModule(this.a(), Clipperz.Crypto.SRP.n());
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if (this._A.equals(0)) {
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MochiKit.Logging.logError("Clipperz.Crypto.SRP.Connection: trying to set 'A' to 0.");
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throw Clipperz.Crypto.SRP.exception.InvalidValue;
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}
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//MochiKit.Logging.logDebug("SRP A: " + this._A);
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}
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return this._A;
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},
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//-------------------------------------------------------------------------
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's': function () {
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return this._s;
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//MochiKit.Logging.logDebug("SRP s: " + this._S);
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},
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'set_s': function(aValue) {
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this._s = aValue;
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},
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//-------------------------------------------------------------------------
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'B': function () {
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return this._B;
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},
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'set_B': function(aValue) {
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// Warning: this value should be strictly greater than zero: how should we perform this check?
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if (! aValue.equals(0)) {
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this._B = aValue;
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//MochiKit.Logging.logDebug("SRP B: " + this._B);
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} else {
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MochiKit.Logging.logError("Clipperz.Crypto.SRP.Connection: trying to set 'B' to 0.");
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throw Clipperz.Crypto.SRP.exception.InvalidValue;
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}
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},
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//-------------------------------------------------------------------------
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'x': function () {
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if (this._x == null) {
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this._x = new Clipperz.Crypto.BigInt(this.stringHash(this.s().asString(16, 64) + this.P()), 16);
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//MochiKit.Logging.logDebug("SRP x: " + this._x);
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}
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return this._x;
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},
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//-------------------------------------------------------------------------
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'u': function () {
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if (this._u == null) {
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this._u = new Clipperz.Crypto.BigInt(this.stringHash(this.B().asString()), 16);
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//MochiKit.Logging.logDebug("SRP u: " + this._u);
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}
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return this._u;
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},
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//-------------------------------------------------------------------------
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'S': function () {
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if (this._S == null) {
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var bigint;
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var srp;
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bigint = Clipperz.Crypto.BigInt;
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srp = Clipperz.Crypto.SRP;
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this._S = bigint.powerModule(
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bigint.subtract(this.B(), bigint.powerModule(srp.g(), this.x(), srp.n())),
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bigint.add(this.a(), bigint.multiply(this.u(), this.x())),
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srp.n()
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)
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//MochiKit.Logging.logDebug("SRP S: " + this._S);
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}
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return this._S;
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},
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//-------------------------------------------------------------------------
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'K': function () {
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if (this._K == null) {
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this._K = this.stringHash(this.S().asString());
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//MochiKit.Logging.logDebug("SRP K: " + this._K);
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}
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return this._K;
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},
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//-------------------------------------------------------------------------
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'M1': function () {
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if (this._M1 == null) {
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this._M1 = this.stringHash(this.A().asString(10) + this.B().asString(10) + this.K());
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//MochiKit.Logging.logDebug("SRP M1: " + this._M1);
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}
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return this._M1;
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},
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//-------------------------------------------------------------------------
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'M2': function () {
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if (this._M2 == null) {
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this._M2 = this.stringHash(this.A().asString(10) + this.M1() + this.K());
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//MochiKit.Logging.logDebug("SRP M2: " + this._M2);
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}
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return this._M2;
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},
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//=========================================================================
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'serverSideCredentialsWithSalt': function(aSalt) {
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var result;
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var s, x, v;
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s = aSalt;
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x = this.stringHash(s + this.P());
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v = Clipperz.Crypto.SRP.g().powerModule(new Clipperz.Crypto.BigInt(x, 16), Clipperz.Crypto.SRP.n());
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result = {};
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result['C'] = this.C();
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result['s'] = s;
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result['v'] = v.asString(16);
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return result;
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},
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'serverSideCredentials': function() {
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var result;
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var s;
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s = Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32).toHexString().substring(2);
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result = this.serverSideCredentialsWithSalt(s);
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return result;
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},
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//=========================================================================
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/*
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'computeServerSide_S': function(b) {
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var result;
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var v;
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var bigint;
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var srp;
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bigint = Clipperz.Crypto.BigInt;
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srp = Clipperz.Crypto.SRP;
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v = new Clipperz.Crypto.BigInt(srpConnection.serverSideCredentialsWithSalt(this.s().asString(16, 64)).v, 16);
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// _S = (this.A().multiply(this.v().modPow(this.u(), this.n()))).modPow(this.b(), this.n());
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result = bigint.powerModule(
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bigint.multiply(
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this.A(),
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bigint.powerModule(v, this.u(), srp.n())
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), new Clipperz.Crypto.BigInt(b, 10), srp.n()
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);
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return result;
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},
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*/
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//=========================================================================
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'stringHash': function(aValue) {
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var result;
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result = this.hash(new Clipperz.ByteArray(aValue)).toHexString().substring(2);
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return result;
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},
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//=========================================================================
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__syntaxFix__: "syntax fix"
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});
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//#############################################################################
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