From 0461d76899379cb1e2ecd15456d2e6eb4fb8fa60 Mon Sep 17 00:00:00 2001
From: Azul <azul@riseup.net>
Date: Tue, 21 Aug 2012 17:59:11 +0200
Subject: moved srp-js files from lib to src

---
 lib/srp_session.js | 138 -----------------------------------------------------
 1 file changed, 138 deletions(-)
 delete mode 100644 lib/srp_session.js

(limited to 'lib/srp_session.js')

diff --git a/lib/srp_session.js b/lib/srp_session.js
deleted file mode 100644
index 93bfbe5..0000000
--- a/lib/srp_session.js
+++ /dev/null
@@ -1,138 +0,0 @@
-SRP.prototype.Session = function() {
-  
-  // Variables session will be used in the SRP protocol
-  var Nstr = "115b8b692e0e045692cf280b436735c77a5a9e8a9e7ed56c965f87db5b2a2ece3";
-  var N = new BigInteger(Nstr, 16);
-  var g = new BigInteger("2");
-  var k = new BigInteger("c46d46600d87fef149bd79b81119842f3c20241fda67d06ef412d8f6d9479c58", 16);
-
-  var rng = new SecureRandom();
-  var a = new BigInteger(32, rng);
-  var A = g.modPow(a, N);
-  while(A.mod(N) == 0)
-  {
-    a = new BigInteger(32, rng);
-    A = g.modPow(a, N);
-  }
-  var Astr = A.toString(16);
-  var S = null;
-  var K = null;
-  var M = null;
-  var M2 = null;
-  var authenticated = false;
-  var I = document.getElementById("srp_username").value;
-  var pass = document.getElementById("srp_password").value;
-  var V;
-  var salt;
-
-  // *** Accessor methods ***
-
-  // allows setting the random number A for testing
-
-  this.calculateAndSetA = function(_a)
-  {
-    a = new BigInteger(_a, 16);
-    A = g.modPow(a, N);
-    Astr = A.toString(16);
-    return Astr;
-  };
-
-  this.getAstr = function() {
-    return Astr;
-  }
-
-  // Returns the user's identity
-  this.getI = function()
-  {
-    return I;
-  };
-
-  // some 16 byte random number
-  this.getSalt = function() {
-    salt = salt || new BigInteger(64, rng).toString(16);
-    return salt
-  }
-
-  // Returns the BigInteger, g
-  this.getg = function()
-  {
-    return g;
-  };
-
-  // Returns the BigInteger, N
-  this.getN = function()
-  {
-    return N;
-  };
-
-  // Calculates the X value and return it as a BigInteger
-  this.calcX = function(s)
-  {
-    return new BigInteger(SHA256(s + SHA256(I + ":" + pass)), 16);
-  };
-
-  this.getV = function(salt)
-  {
-    V = V || this.getg().modPow(this.calcX(salt), this.getN());
-    return V;
-  }
-
-  // Calculate S, M, and M2
-  // This is the client side of the SRP specification
-  this.calculations = function(salt, ephemeral)
-  {    
-    //S -> C: s | B
-    var B = new BigInteger(ephemeral, 16); 
-    var Bstr = ephemeral;
-    // u = H(A,B)
-    var u = new BigInteger(SHA256(Astr + Bstr), 16); 
-    // x = H(s, H(I:p))
-    var x = new BigInteger(SHA256(salt + SHA256(I + ":" + pass)), 16);
-    //S = (B - kg^x) ^ (a + ux)
-    var kgx = k.multiply(g.modPow(x, N));  
-    var aux = a.add(u.multiply(x)); 
-    S = B.subtract(kgx).modPow(aux, N); 
-    // M = H(H(N) xor H(g), H(I), s, A, B, K)
-    var Mstr = A.toString(16) + B.toString(16) + S.toString(16); 
-    M = SHA256(Mstr);
-    M2 = SHA256(A.toString(16) + M + S.toString(16)); 
-    //M2 = H(A, M, K)
-  };
-
-  this.getM = function() {
-    return M;
-  }
-
-  this.validate = function(serverM2) {
-    authenticated = (serverM2 && serverM2 == M2)
-    return authenticated;
-  }
-
-  // If someone wants to use the session key for encrypting traffic, they can
-  // access the key with this function.
-  this.key = function()
-  {
-    if(K) return K;
-    if(authenticated) {
-      K = SHA256(S.toString(16));
-      return K;
-    }
-    else
-      this.onError("User has not been authenticated.");
-  };
-
-  // Encrypt plaintext using slowAES
-  this.encrypt = function(plaintext)
-  {
-    var key = cryptoHelpers.toNumbers(session.key());
-    var byteMessage = cryptoHelpers.convertStringToByteArray(plaintext);
-    var iv = new Array(16);
-    rng.nextBytes(iv);
-    var paddedByteMessage = slowAES.getPaddedBlock(byteMessage, 0, byteMessage.length, slowAES.modeOfOperation.CFB);
-    var ciphertext = slowAES.encrypt(paddedByteMessage, slowAES.modeOfOperation.CFB, key, key.length, iv).cipher;
-    var retstring = cryptoHelpers.base64.encode(iv.concat(ciphertext));
-    while(retstring.indexOf("+",0) > -1)
-      retstring = retstring.replace("+", "_");
-    return retstring;
-  };
-}
-- 
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