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Code Issues Releases Wiki Activity

Fixed vulnerability CLP-01-016

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This commit is contained in:
Giulio Cesare Solaroli
2014-05-30 16:10:13 +02:00
parent ed6b4edc82
commit 7fdb41fa2b
3 changed files with 125 additions and 48 deletions
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53
frontend/gamma/js/Clipperz/Crypto/SRP.js
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@@ -44,6 +44,8 @@ MochiKit.Base.update(Clipperz.Crypto.SRP, {
'_n': null,
'_g': null,
'_k': null,
//-------------------------------------------------------------------------
'n': function() {
@@ -64,6 +66,15 @@ MochiKit.Base.update(Clipperz.Crypto.SRP, {
return Clipperz.Crypto.SRP._g;
},
'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;
},
//-----------------------------------------------------------------------------
'exception': {
@@ -138,10 +149,9 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
'A': function () {
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.");
throw Clipperz.Crypto.SRP.exception.InvalidValue;
}
@@ -167,10 +177,9 @@ 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.");
throw Clipperz.Crypto.SRP.exception.InvalidValue;
}
@@ -190,7 +199,7 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
'u': function () {
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);
}
return this._u;
@@ -207,9 +216,15 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
srp = Clipperz.Crypto.SRP;
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()
)
}
@@ -230,7 +245,20 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
'M1': function () {
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);
}
return this._M1;
@@ -241,6 +269,7 @@ Clipperz.Crypto.SRP.Connection.prototype = MochiKit.Base.update(null, {
'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;