fix(core): update

LICENSE

@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Push.Rocks
+Copyright (c) 2014 Maurice Butler
+Copyright (c) 2016 Lossless GmbH
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

ts/index.ts

@@ -8,3 +8,5 @@ export { create, docker, normalize, indent };
 export { Base64, base64 } from './smartstring.base64';
 export { Domain } from './smartstring.domain';
 export { GitRepo } from './smartstring.git';
+
+export { Cryptr } from './smartstring.encryption';

ts/smartstring.encryption.ts

@@ -0,0 +1,43 @@
+import * as plugins from './smartstring.plugins';
+
+const algorithm = 'aes-256-ctr';
+
+export class Cryptr {
+  private key: Buffer;
+
+  constructor(secret) {
+    if (!secret || typeof secret !== 'string') {
+      throw new Error('Cryptr: secret must be a non-0-length string');
+    }
+
+    this.key = plugins.crypto
+      .createHash('sha256')
+      .update(String(secret))
+      .digest();
+  }
+
+  encrypt(value: string) {
+    if (value == null) {
+      throw new Error('value must not be null or undefined');
+    }
+
+    const iv = plugins.crypto.randomBytes(16);
+    const cipher = plugins.crypto.createCipheriv(algorithm, this.key, iv);
+    const encrypted = cipher.update(String(value), 'utf8', 'hex') + cipher.final('hex');
+
+    return iv.toString('hex') + encrypted;
+  }
+
+  decrypt(value: string) {
+    if (value == null) {
+      throw new Error('value must not be null or undefined');
+    }
+
+    const stringValue = String(value);
+    const iv = Buffer.from(stringValue.slice(0, 32), 'hex');
+    const encrypted = stringValue.slice(32);
+
+    const decipher = plugins.crypto.createDecipheriv(algorithm, this.key, iv);
+    return decipher.update(encrypted, 'hex', 'utf8') + decipher.final('utf8');
+  }
+}

ts/smartstring.plugins.ts

@@ -1,6 +1,15 @@
+// node native
+import * as crypto from 'crypto';
+
+export {
+  crypto
+}
+
+// third party
 export let jsBase64 = require('js-base64').Base64;
 
 export let stripIndent = require('strip-indent');
 export let normalizeNewline = require('normalize-newline');
 export let randomatic = require('randomatic');
 export let cryptoRandomString = require('crypto-random-string');
+