krypt - npm Package Compare versions

Comparing version 0.2.2 to 0.3.0

CHANGELOG.md

@@ -17,1 +17,7 @@ ## 0.1.0 (3/7/2014)
 + Fixed typo in payload
+
+## 0.3.0 (3/18/2014)
+
++ Updated `keyLength` to be expressed in bits (w/ legacy support for converting 32 Byte length keys)
++ Added support to inject custom context into the encrypted result
+  + Useful for recording metadata, such as the name of the key you are using, etc.

lib/krypt.js

@@ -8,7 +8,8 @@ /*!
 
-var crypto = require('crypto');
+var crypto = require('crypto'),
+    _ = require('lodash');
 
 var CIPHER = 'aes-256-cbc',
     KEY_DERIVATION = 'pbkdf2',
-    DEFAULT_KEY_LENGTH = 32,
+    DEFAULT_KEY_LENGTH = 256,
     DEFAULT_ITERATIONS = 64000;
@@ -31,2 +32,3 @@
   this.defaultSecret = config.secret;
+  this.context = config.context || {};
 }
@@ -48,3 +50,7 @@
 
+Krypt.prototype.setContext = function setContext(context) {
+  this.context = context;
+};
 
+
 Krypt.prototype.encrypt = function encrypt(input, secret) {
@@ -61,3 +67,8 @@
 
-  var salt = crypto.randomBytes(this.keyLength),
+  // Legacy check to deal with old versions that recorded key length in Bytes
+  if (this.keyLength === 32) {
+    this.keyLength = this.keyLength * 8;
+  }
+
+  var salt = crypto.randomBytes(this.keyLength / 8),
       iv = crypto.randomBytes(16);
@@ -67,3 +78,3 @@
 
-    var key = crypto.pbkdf2Sync(secret, salt, this.iterations, this.keyLength),
+    var key = crypto.pbkdf2Sync(secret, salt, this.iterations, this.keyLength / 8),
         cipher = crypto.createCipheriv(CIPHER, key, iv);
@@ -74,3 +85,3 @@
 
-    return {
+    var result = {
       cipher: CIPHER,
@@ -85,2 +96,6 @@ keyDerivation: KEY_DERIVATION,
 
+    _.defaults(result, this.context);
+
+    return result;
+
   } catch (err) {
@@ -125,5 +140,10 @@ throw new Error('Unable to encrypt value due to: ' + err);
 
+  // Legacy check to deal with old versions that recorded key length in Bytes
+  if (keyLength === 32) {
+    keyLength = keyLength * 8;
+  }
+
   try {
 
-    var key = crypto.pbkdf2Sync(secret, salt, iterations, keyLength),
+    var key = crypto.pbkdf2Sync(secret, salt, iterations, keyLength / 8),
         decipher = crypto.createDecipheriv(CIPHER, key, iv);
@@ -130,0 +150,0 @@

package.json

 {
   "name": "krypt",
-  "version": "0.2.2",
+  "version": "0.3.0",
   "description": "Simple, secure symmetric encryption utility for Node.",
@@ -26,3 +26,4 @@ "main": "index.js",
   "dependencies": {
-    "nconf": "~0.6.9"
+    "nconf": "~0.6.9",
+    "lodash": "~2.4.1"
   },
@@ -29,0 +30,0 @@ "devDependencies": {

No alert changes

Improved metrics

Total package byte prevSize

12120

increased by7.32%

Lines of code

266

increased by5.98%

Worsened metrics

Dependency count

2

increased by100%

Dependency changes

• + Addedlodash@~2.4.1

• + Addedlodash@2.4.2(transitive)