Adds fail fast assertions for invalid input

src/eckey.js

@@ -1,30 +1,32 @@
-var BigInteger = require('./jsbn/jsbn');
+var Address = require('./address')
-var sec = require('./jsbn/sec');
+var assert = require('assert')
-var base58 = require('./base58');
+var convert = require('./convert')
-var util = require('./util');
+var base58 = require('./base58')
-var convert = require('./convert');
+var BigInteger = require('./jsbn/jsbn')
-var Address = require('./address');
+var ecdsa = require('./ecdsa')
-var ecdsa = require('./ecdsa');
+var ECPointFp = require('./jsbn/ec').ECPointFp
-var ECPointFp = require('./jsbn/ec').ECPointFp;
+var sec = require('./jsbn/sec')
 var Network = require('./network')
+var util = require('./util')
 
-var ecparams = sec("secp256k1");
+var ecparams = sec("secp256k1")
 
 // input can be nothing, array of bytes, hex string, or base58 string
 var ECKey = function (input, compressed) {
-    if (!(this instanceof ECKey)) { return new ECKey(input, compressed); }
+  if (!(this instanceof ECKey)) { return new ECKey(input, compressed) }
   if (!input) {
     // Generate new key
-        var n = ecparams.getN();
+    var n = ecparams.getN()
-        this.priv = ecdsa.getBigRandom(n);
+    this.priv = ecdsa.getBigRandom(n)
-        this.compressed = compressed || false;
+    this.compressed = compressed || false
   }
   else this.import(input,compressed)
-};
+}
 
 ECKey.prototype.import = function (input, compressed) {
   function has(li, v) { return li.indexOf(v) >= 0 }
   function fromBin(x) { return BigInteger.fromByteArrayUnsigned(x) }
+
   this.priv =
       input instanceof ECKey                   ? input.priv
     : input instanceof BigInteger              ? input.mod(ecparams.getN())
@@ -38,6 +40,8 @@ ECKey.prototype.import = function (input, compressed) {
     : has([64,65],input.length)                ? fromBin(convert.hexToBytes(input.slice(0, 64)))
     : null
 
+  assert(this.priv !== null)
+
   this.compressed =
       compressed !== undefined                 ? compressed
     : input instanceof ECKey                   ? input.compressed
@@ -52,7 +56,9 @@ ECKey.prototype.import = function (input, compressed) {
     : input.length == 64                       ? false
     : input.length == 65                       ? true
     : null
-};
+
+  assert(this.compressed !== null)
+}
 
 ECKey.prototype.getPub = function(compressed) {
     if (compressed === undefined) compressed = this.compressed
@@ -137,6 +143,8 @@ ECPubKey.prototype.import = function(input, compressed) {
     : Array.isArray(input)       ? decode(input)
     : null
 
+  assert(this.pub !== null)
+
   this.compressed =
       compressed                 ? compressed
     : input instanceof ECPointFp ? input.compressed