add scrypt pbkdf

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.1.0
+
+Added scrypt key derivation function
+
 ## 2.0.0
 
 Signature related functions have changed to be asynchronous and to accept async

README.md

@@ -1,6 +1,6 @@
 # @sapphirecode/crypto-helper
 
-version: 2.0.x
+version: 2.1.x
 
 simple functions for cryptography
 
@@ -26,6 +26,7 @@ const rand_salt = crypto.create_salt(); // same as random_hex, but with fixed le
 const random_string = crypto.random_string(16); // output 16 character long random string
 const hash = crypto.hash_sha512(random_string, random_hex); // returns sha 512 hex
 const check = crypto.checksum('foo'); // returns a sha 256 hex
+const scrypt_hash = await crypto.pbkdf_scrypt('foo', 'bar'); // returns a scrypt hash
 
 // jwt like object signing
 const signed = crypto.sign_object({foo: 'bar'}, 'secret');

index.js

@@ -13,11 +13,13 @@ const hashing = require ('./lib/hashing');
 const random = require ('./lib/random');
 const signatures = require ('./lib/signatures');
 const rsa = require ('./lib/rsa');
+const pbkdf = require ('./lib/pbkdf');
 
 module.exports = {
   ...random,
   ...hashing,
   ...encryption,
   ...signatures,
-  ...rsa
+  ...rsa,
+  ...pbkdf
 };

lib/pbkdf.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const { scrypt } = require ('scrypt-js');
+
+/**
+ * creates a scrypt hash
+ *
+ * @param {string} str string input
+ * @param {string} salt salt
+ * @returns {Promise<string>} hash
+ */
+async function pbkdf_scrypt (str, salt) {
+  const bstr = Buffer.from (str.normalize ('NFKC'), 'utf-8');
+  const bsalt = Buffer.from (salt.normalize ('NFKC'), 'utf-8');
+  const hash = await scrypt (bstr, bsalt, 65536, 8, 1, 64);
+  return Buffer.from (hash)
+    .toString ('hex');
+}
+
+module.exports = { pbkdf_scrypt };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@sapphirecode/crypto-helper",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "main": "index.js",
   "author": {
     "name": "Timo Hocker",
@@ -34,7 +34,8 @@
     "compile": "tsc --allowJs --declaration --emitDeclarationOnly --lib es6 index.js"
   },
   "dependencies": {
-    "@sapphirecode/encoding-helper": "^1.1.0"
+    "@sapphirecode/encoding-helper": "^1.1.0",
+    "scrypt-js": "^3.0.1"
   },
   "files": [
     "LICENSE",

test/spec/pbkdf.js

@@ -0,0 +1,16 @@
+'use strict';
+
+const crypto = require ('../../index');
+
+describe ('hashing', () => {
+  it ('scrypt', async () => {
+    const hash = await crypto.pbkdf_scrypt ('a', 'b');
+    expect (
+      hash
+    )
+      .toEqual (
+      // eslint-disable-next-line max-len
+        '1c357645d521cce3d015441a4215814d8acbf98ed671880ba369039784de05043f0fd9867a0f265b6e5303da202ec4d541bd11752079d8f490ed1fc52e547497'
+      );
+  });
+});

yarn.lock

@@ -2161,6 +2161,11 @@ safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
+scrypt-js@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/scrypt-js/-/scrypt-js-3.0.1.tgz#d314a57c2aef69d1ad98a138a21fe9eafa9ee312"
+  integrity sha512-cdwTTnqPu0Hyvf5in5asVdZocVDTNRmR7XEcJuIzMjJeSHybHl7vpB66AzwTaIg6CLSbtjcxc8fqcySfnTkccA==
+
 semver@^6.0.0, semver@^6.1.0, semver@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"