REACT-NATIVE-AES-ECB

A pure JavaScript implementation of the AES block cipher algorithm and features.

Simple and very secure Cipher for encrypt and decrypt some sensetive string values.

Features

• Pure JavaScript
• key size (must be 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes))
• Supports all key sizes (128-bit, 192-bit and 256-bit)
• Supports all common modes of operation ( ECB )
• Added prefix feature

Strings and Bytes

Strings could be used as keys. But UTF-8 allows variable length, multi-byte characters, so a string that is 16 characters long may not be 16 bytes long.

Also, UTF8 should NOT be used to store arbitrary binary data as it is a string encoding format, not a binary encoding format.

API

React native

To install react-native-aes-ecb in your react native project:

npm install react-native-aes-ecb

And to access it from within you app, simply add:

var aesEcb = require('react-native-aes-ecb');

KeyString must be 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes) long.

How it works

keyString - is some unique secret key that takes part in encryption and decryption process.

input - is any string that you want to be encrypted and decrypted later.

var keyString = 'KeyMustBe16ByteOR24ByteOR32Byte!';
var input = 'Some secret string that should be encrypted or decrypted !';

var encrypt = aesEcb.encrypt(keyString, input);
var decrypt = aesEcb.decrypt(keyString, input);

Example with "Hello world!"

//Encrypt

aesEcb.encrypt('KeyMustBe16ByteOR24ByteOR32Byte!', 'Hello world!')

// result looks like ' C41XiUDI/bEvSwYO1iZvOQ== '

//Decrypt

aesEcb.decrypt('KeyMustBe16ByteOR24ByteOR32Byte!', 'C41XiUDI/bEvSwYO1iZvOQ==')

// result looks like ' Hello world! '

Features

aes-ecb.encrypt has required arguments as "keyString" and "input",

and optional as "pref" - prefix & "s" -separator

Example with "Hello world" and prefix with separator

IMPORTANT * when you want to use prefix you should use separator also it's required!

//shema  aesEcb.encrypt(keyString, input, pref, s);

aesEcb.encrypt('KeyMustBe16ByteOR24ByteOR32Byte!', 'Hello world!', "prefix", " :: ");

//result looks like ' prefix::C41XiUDI/bEvSwYO1iZvOQ=='

IMPORTANT * if you had used prefix and separator for encrypt value so for decrypt you should use separator only, or both prefix and separator as separator!

//shema  aesEcb.decrypt(keyString, input, s);

aesEcb.decrypt('KeyMustBe16ByteOR24ByteOR32Byte!', 'Hello world!', " :: ");

//result looks like ' Hello world! '

//shema  aesEcb.decrypt(keyString, input, s);

aesEcb.decrypt('KeyMustBe16ByteOR24ByteOR32Byte!', 'Hello world!', " prefix:: ");

//result looks like ' Hello world! '