clipperz
/
password-manager-mirror
mirror of http://git.whoc.org.uk/git/password-manager.git
1
0
Fork 0
Code Issues Releases Wiki Activity
password-manager-mirror/frontend/delta/js/Clipperz/Crypto/SRP.js

406 lines
12 KiB
JavaScript
Raw Blame History

/*
Copyright 2008-2018 Clipperz Srl
This file is part of Clipperz, the online password manager.
For further information about its features and functionalities please
refer to http://www.clipperz.com.
* Clipperz is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
* Clipperz 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public
License along with Clipperz. If not, see http://www.gnu.org/licenses/.
*/
try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
}
try { if (typeof(Clipperz.Crypto.BigInt) == 'undefined') { throw ""; }} catch (e) {
throw "Clipperz.Crypto.SRP depends on Clipperz.Crypto.BigInt!";
}
try { if (typeof(Clipperz.Crypto.PRNG) == 'undefined') { throw ""; }} catch (e) {
throw "Clipperz.Crypto.SRP depends on Clipperz.Crypto.PRNG!";
}
if (typeof(Clipperz.Crypto.SRP) == 'undefined') { Clipperz.Crypto.SRP = {}; }
Clipperz.Crypto.SRP.VERSION = "0.1";
Clipperz.Crypto.SRP.NAME = "Clipperz.Crypto.SRP";
//#############################################################################
MochiKit.Base.update(Clipperz.Crypto.SRP, {
'_n': null,
'_g': null,
'_k': null,
//-------------------------------------------------------------------------
'n': function() {
if (Clipperz.Crypto.SRP._n == null) {
Clipperz.Crypto.SRP._n = new Clipperz.Crypto.BigInt("115b8b692e0e045692cf280b436735c77a5a9e8a9e7ed56c965f87db5b2a2ece3", 16);
}
return Clipperz.Crypto.SRP._n;
},
//-------------------------------------------------------------------------
'g': function() {
if (Clipperz.Crypto.SRP._g == null) {
Clipperz.Crypto.SRP._g = new Clipperz.Crypto.BigInt(2); // eventually 5 (as suggested on the Diffi-Helmann documentation)
}
return Clipperz.Crypto.SRP._g;
},
'k': function() {
//k = H(N, g)
if (Clipperz.Crypto.SRP._k == null) {
// Clipperz.Crypto.SRP._k = new Clipperz.Crypto.BigInt(this.stringHash(this.n().asString() + this.g().asString()), 16);
// This is a fixed hash derived from a hash of N and G
// Following hash for just AES256
// Clipperz.Crypto.SRP._k = new Clipperz.Crypto.BigInt("64398bff522814e306a97cb9bfc4364b7eed16a8c17c5208a40a2bad2933c8e", 16);
// Following hash for dual AES256
Clipperz.Crypto.SRP._k = new Clipperz.Crypto.BigInt("23059873679103356965010473015094804246238452944122574891019568752064785140295", 10);
}
return Clipperz.Crypto.SRP._k;
},
//-----------------------------------------------------------------------------
'exception': {
'InvalidValue': new MochiKit.Base.NamedError("Clipperz.Crypto.SRP.exception.InvalidValue")
},
//-------------------------------------------------------------------------
__syntaxFix__: "syntax fix"
});
//#############################################################################
//
// S R P C o n n e c t i o n version 1.0
//
//=============================================================================
Clipperz.Crypto.SRP.Connection = function (args) {
args = args || {};
this._C = args.C;
this._P = args.P;
this.hash = args.hash;
this._a = null;
this._A = null;
this._s = null;
this._B = null;
this._x = null;
this._u = null;
this._K = null;
this._M1 = null;
this._M2 = null;
this._sessionKey = null;
return this;
}
Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
'toString': function () {
return "Clipperz.Crypto.SRP.Connection (username: " + this.username() + "). Status: " + this.statusDescription();
},
//-------------------------------------------------------------------------
'C': function () {
return this._C;
},
//-------------------------------------------------------------------------
'P': function () {
return this._P;
},
//-------------------------------------------------------------------------
'a': function () {
if (this._a == null) {
// this._a = new Clipperz.Crypto.BigInt(Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32).toHexString().substring(2), 16);
// Due to the problem with BigInt not handling signed numbers, this must be even.
// Possible generate any number, then bitwise shift right then left.
this._a = new Clipperz.Crypto.BigInt("33361134861037855263467252772741875431812790785257651194773534061185325245730", 10);
}
return this._a;
},
//-------------------------------------------------------------------------
'A': function () {
if (this._A == null) {
// Warning: this value should be strictly greater than zero
this._A = Clipperz.Crypto.SRP.g().powerModule(this.a(), Clipperz.Crypto.SRP.n());
// if (this._A.equals(0) || negative(this._A)) {
if (this._A.compare(Clipperz.Crypto.BigInt.ZERO) <= 0) {
Clipperz.logError("Clipperz.Crypto.SRP.Connection: trying to set 'A' to 0.");
throw Clipperz.Crypto.SRP.exception.InvalidValue;
}
}
return this._A;
},
//-------------------------------------------------------------------------
's': function () {
return this._s;
},
'set_s': function(aValue) {
this._s = aValue;
},
//-------------------------------------------------------------------------
'B': function () {
return this._B;
},
'set_B': function(aValue) {
// Warning: this value should be strictly greater than zero
this._B = aValue;
// if (this._B.equals(0) || negative(this._B)) {
if (this._B.compare(Clipperz.Crypto.BigInt.ZERO) <= 0) {
Clipperz.logError("Clipperz.Crypto.SRP.Connection: trying to set 'B' to 0.");
throw Clipperz.Crypto.SRP.exception.InvalidValue;
}
},
//-------------------------------------------------------------------------
'x': function () {
if (this._x == null) {
// Private key x = H(s, p)
this._x = new Clipperz.Crypto.BigInt(this.stringHash(this.s() + this.P()), 16);
}
return this._x;
},
//-------------------------------------------------------------------------
'u': function () {
if (this._u == null) {
this._u = new Clipperz.Crypto.BigInt(this.stringHash(this.A().asString() + this.B().asString()), 16);
}
return this._u;
},
//-------------------------------------------------------------------------
'S': function () {
// S = (B - kg^x) ^ (a + ux)
if (this._S == null) {
var bigint;
var srp;
bigint = Clipperz.Crypto.BigInt;
srp = Clipperz.Crypto.SRP;
// S can be negative. This breaks as the BigInt Library is unsigned
this._S = bigint.powerModule( bigint.subtract( bigint.multiply(Clipperz.Crypto.SRP.k(),bigint.powerModule(srp.g(), this.x(), srp.n())), this.B()), bigint.add(this.a(), bigint.multiply(this.u(), this.x())),srp.n() );
// var tmp_B = new BigInteger(this.B());
// var tmp_k = new BigInteger(Clipperz.Crypto.SRP.k());
// var tmp_g = new BigInteger(srp.g());
// var tmp_x = new BigInteger(this.x());
// var tmp_a = new BigInteger(this.a());
// var tmp_n = new BigInteger(srp.n());
// var tmp_u = new BigInteger(this.u());
//
// var tmp_S1 = new BigInteger(tmp_B.subtract(tmp_k.multiply(tmp_g.modPow(tmp_x,tmp_n))));
// var tmp_S2 = new BigInteger(tmp_a.add(tmp_u.multiply(tmp_x)));
// var tmp_S = new BigInteger(tmp_S1.modPow(tmp_S2,tmp_n));
// if (tmp_S.isNegative() == true ) {
// tmp_S = tmp_S.add(srp.n());
// }
//console.log("_B", tmp_B.toString());
//console.log("_k", tmp_k.toString());
//console.log("_g", tmp_g.toString());
//console.log("_x", tmp_x.toString());
//console.log("_a", tmp_a.toString());
//console.log("_n", tmp_n.toString());
//console.log("_u", tmp_u.toString());
//console.log("S1", tmp_S1.toString());
//console.log("S2", tmp_S2.toString());
//console.log("S-", tmp_S.toString());
}
//this._S= Clipperz.Crypto.BigInt(tmp_S.toString(),10);
return this._S;
},
//-------------------------------------------------------------------------
'K': function () {
if (this._K == null) {
this._K = this.stringHash(this.S().asString());
}
return this._K;
},
//-------------------------------------------------------------------------
'M1': function () {
if (this._M1 == null) {
// this._M1 = this.stringHash(this.A().asString(10) + this.B().asString(10) + this.K());
// http://srp.stanford.edu/design.html
// User -> Host: M = H(H(N) xor H(g), H(I), s, A, B, K)
this._M1 = this.stringHash(
"597626870978286801440197562148588907434001483655788865609375806439877501869636875571920406529" +
this.stringHash(this.C()) +
this.s().asString() +
this.A().asString() +
this.B().asString() +
new Clipperz.Crypto.BigInt(this.K(),16).asString()
);
//console.log("M1", this._M1);
//console.log("g", this.g().asString());
//console.log("s", this.s().asString());
//console.log("a", this.a().asString());
//console.log("A", this.A().asString());
//console.log("B", this.B().asString());
//console.log("S", this.S().asString());
//console.log("k", Clipperz.Crypto.SRP.k().asString());
//console.log("K", this.K());
//console.log("x", this.x().asString());
//console.log("P", this.P());
//console.log("u", this.u());
//console.log("u", this.u().asString());
//console.log("Test", this.stringHash(this.A().asString));
//console.log("N", Clipperz.Crypto.SRP.n().asString());
//console.log("g", Clipperz.Crypto.SRP.g().asString());
//console.log("test", this.A().asString() + this.B().asString());
}
return this._M1;
},
//-------------------------------------------------------------------------
'M2': function () {
if (this._M2 == null) {
this._M2 = this.stringHash(this.A().asString(10) + this.M1() + this.K());
//console.log("M2", this._M2);
}
return this._M2;
},
//=========================================================================
'serverSideCredentialsWithSalt': function(aSalt) {
var result;
var s, x, v;
//` s = aSalt;
s = new Clipperz.Crypto.BigInt(aSalt,16);
x = this.stringHash(s.asString() + this.P());
x = this.stringHash(s + this.P());
v = Clipperz.Crypto.SRP.g().powerModule(new Clipperz.Crypto.BigInt(x, 16), Clipperz.Crypto.SRP.n());
result = {};
result['C'] = this.C();
result['s'] = s.asString(16);
result['v'] = v.asString(16);
//console.log("ServerSide C", result['C']);
//console.log("ServerSide s", result['s']);
//console.log("ServerSide v", result['v']);
//console.log("ServerSide P", this.P());
//console.log("ServerSide x", ge.asString());
return result;
},
'serverSideCredentials': function() {
var result;
var s;
s = Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32).toHexString().substring(2);
result = this.serverSideCredentialsWithSalt(s);
return result;
},
//=========================================================================
/*
'computeServerSide_S': function(b) {
var result;
var v;
var bigint;
var srp;
bigint = Clipperz.Crypto.BigInt;
srp = Clipperz.Crypto.SRP;
v = new Clipperz.Crypto.BigInt(srpConnection.serverSideCredentialsWithSalt(this.s().asString(16, 64)).v, 16);
// _S = (this.A().multiply(this.v().modPow(this.u(), this.n()))).modPow(this.b(), this.n());
result = bigint.powerModule(
bigint.multiply(
this.A(),
bigint.powerModule(v, this.u(), srp.n())
), new Clipperz.Crypto.BigInt(b, 10), srp.n()
);
return result;
},
*/
//=========================================================================
'stringHash': function(aValue) {
var result;
//result = this.hash(new Clipperz.ByteArray(aValue)).toHexString().substring(2);
//result = Clipperz.Crypto.SHA.sha256( new Clipperz.ByteArray(aValue)).toHexString().substring(2);
result = Clipperz.Crypto.SHA.sha_d256( new Clipperz.ByteArray(aValue)).toHexString().substring(2);
return result;
},
//=========================================================================
__syntaxFix__: "syntax fix"
});
//#############################################################################
Reference in New Issue View Git Blame Copy Permalink