add base files

1 files changed, 57 insertions, 0 deletions

diff --git a/node_modules/ecc-jsbn/index.js b/node_modules/ecc-jsbn/index.js
new file mode 100644
index 0000000..2437281
--- /dev/null
+++ b/node_modules/ecc-jsbn/index.js
@@ -0,0 +1,57 @@
+var crypto = require("crypto");
+var BigInteger = require("jsbn").BigInteger;
+var ECPointFp = require("./lib/ec.js").ECPointFp;
+exports.ECCurves = require("./lib/sec.js");
+
+// zero prepad
+function unstupid(hex,len)
+{
+	return (hex.length >= len) ? hex : unstupid("0"+hex,len);
+}
+
+exports.ECKey = function(curve, key, isPublic)
+{
+  var priv;
+	var c = curve();
+	var n = c.getN();
+  var bytes = Math.floor(n.bitLength()/8);
+
+  if(key)
+  {
+    if(isPublic)
+    {
+      var curve = c.getCurve();
+//      var x = key.slice(1,bytes+1); // skip the 04 for uncompressed format
+//      var y = key.slice(bytes+1);
+//      this.P = new ECPointFp(curve,
+//        curve.fromBigInteger(new BigInteger(x.toString("hex"), 16)),
+//        curve.fromBigInteger(new BigInteger(y.toString("hex"), 16)));      
+      this.P = curve.decodePointHex(key.toString("hex"));
+    }else{
+      if(key.length != bytes) return false;
+      priv = new BigInteger(key.toString("hex"), 16);      
+    }
+  }else{
+    var n1 = n.subtract(BigInteger.ONE);
+    var r = new BigInteger(crypto.randomBytes(n.bitLength()));
+    priv = r.mod(n1).add(BigInteger.ONE);
+    this.P = c.getG().multiply(priv);
+  }
+  if(this.P)
+  {
+//  var pubhex = unstupid(this.P.getX().toBigInteger().toString(16),bytes*2)+unstupid(this.P.getY().toBigInteger().toString(16),bytes*2);
+//  this.PublicKey = new Buffer("04"+pubhex,"hex");
+    this.PublicKey = new Buffer(c.getCurve().encodeCompressedPointHex(this.P),"hex");
+  }
+  if(priv)
+  {
+    this.PrivateKey = new Buffer(unstupid(priv.toString(16),bytes*2),"hex");
+    this.deriveSharedSecret = function(key)
+    {
+      if(!key || !key.P) return false;
+      var S = key.P.multiply(priv);
+      return new Buffer(unstupid(S.getX().toBigInteger().toString(16),bytes*2),"hex");
+   }     
+  }
+}
+