| -rw-r--r-- | frontend/delta/js/Clipperz/Crypto/SRP.js | 53 |
1 files changed, 41 insertions, 12 deletions
diff --git a/frontend/delta/js/Clipperz/Crypto/SRP.js b/frontend/delta/js/Clipperz/Crypto/SRP.js index 597e72d..6898dfb 100644 --- a/frontend/delta/js/Clipperz/Crypto/SRP.js +++ b/frontend/delta/js/Clipperz/Crypto/SRP.js @@ -46,2 +46,4 @@ MochiKit.Base.update(Clipperz.Crypto.SRP, { '_g': null, + '_k': null, + //------------------------------------------------------------------------- @@ -66,2 +68,11 @@ MochiKit.Base.update(Clipperz.Crypto.SRP, { + 'k': function() { + if (Clipperz.Crypto.SRP._k == null) { +// Clipperz.Crypto.SRP._k = new Clipperz.Crypto.BigInt(this.stringHash(this.n().asString() + this.g().asString()), 16); + Clipperz.Crypto.SRP._k = new Clipperz.Crypto.BigInt("64398bff522814e306a97cb9bfc4364b7eed16a8c17c5208a40a2bad2933c8e", 16); + } + + return Clipperz.Crypto.SRP._k; + }, + //----------------------------------------------------------------------------- @@ -140,6 +151,5 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, { if (this._A == null) { - // Warning: this value should be strictly greater than zero: how should we perform this check? + // 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)) { + if (this._A.equals(0) || negative(this._A)) { Clipperz.logError("Clipperz.Crypto.SRP.Connection: trying to set 'A' to 0."); @@ -169,6 +179,5 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, { 'set_B': function(aValue) { - // Warning: this value should be strictly greater than zero: how should we perform this check? - if (! aValue.equals(0)) { - this._B = aValue; - } else { + // Warning: this value should be strictly greater than zero + this._B = aValue; + if (this._B.equals(0) || negative(this._B)) { Clipperz.logError("Clipperz.Crypto.SRP.Connection: trying to set 'B' to 0."); @@ -192,3 +201,3 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, { if (this._u == null) { - this._u = new Clipperz.Crypto.BigInt(this.stringHash(this.B().asString()), 16); + this._u = new Clipperz.Crypto.BigInt(this.stringHash(this.A().asString() + this.B().asString()), 16); } @@ -209,5 +218,11 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, { this._S = bigint.powerModule( - bigint.subtract(this.B(), bigint.powerModule(srp.g(), this.x(), srp.n())), - bigint.add(this.a(), bigint.multiply(this.u(), this.x())), - srp.n() + bigint.subtract( + this.B(), + bigint.multiply( + Clipperz.Crypto.SRP.k(), + bigint.powerModule(srp.g(), this.x(), srp.n()) + ) + ), + bigint.add(this.a(), bigint.multiply(this.u(), this.x())), + srp.n() ) @@ -232,3 +247,16 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, { if (this._M1 == null) { - this._M1 = this.stringHash(this.A().asString(10) + this.B().asString(10) + this.K()); +// 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() + + this.K() + ); +//console.log("M1", this._M1); } @@ -243,2 +271,3 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, { this._M2 = this.stringHash(this.A().asString(10) + this.M1() + this.K()); +//console.log("M2", this._M2); } |