chacha8-js/tests/chacha8.spec.js

A pure javascript ChaCha8 cipher implementation

const expect = require('chai').expect
const Chacha8 = require('../src/Chacha8')

//testdata from was taken from the bytecoins implementation
let testdata = [{
    key: new Int32Array([0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
    iv: new Int32Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
    plain_text: new Int32Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
    cipher_text: new Int32Array([0x65, 0x3f, 0x4a, 0x18, 0xe3, 0xd2, 0x7d, 0xaf, 0x51, 0xf8, 0x41, 0xa0, 0x0b, 0x6c, 0x1a, 0x2b, 0xd2, 0x48, 0x98, 0x52, 0xd4, 0xae, 0x07, 0x11, 0xe1, 0xa4, 0xa3, 0x2a, 0xd1, 0x66, 0xfa, 0x6f, 0x88, 0x1a, 0x28, 0x43, 0x23, 0x8c, 0x7e, 0x17, 0x78, 0x6b, 0xa5, 0x16, 0x2b, 0xc0, 0x19, 0xd5, 0x73, 0x84, 0x9c, 0x16, 0x76, 0x68, 0x51, 0x0a, 0xda, 0x2f, 0x62, 0xb4, 0xff, 0x31, 0xad, 0x04])
},{
    key: new Int32Array([0x0f, 0x62, 0xb5, 0x08, 0x5b, 0xae, 0x01, 0x54, 0xa7, 0xfa, 0x4d, 0xa0, 0xf3, 0x46, 0x99, 0xec, 0x3f, 0x92, 0xe5, 0x38, 0x8b, 0xde, 0x31, 0x84, 0xd7, 0x2a, 0x7d, 0xd0, 0x23, 0x76, 0xc9, 0x1c]),
    iv: new Int32Array([0x28, 0x8f, 0xf6, 0x5d, 0xc4, 0x2b, 0x92, 0xf9]),
    plain_text: new Int32Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
    cipher_text: new Int32Array([0xdb, 0x16, 0x58, 0x14, 0xf6, 0x67, 0x33, 0xb7, 0xa8, 0xe3, 0x4d, 0x1f, 0xfc, 0x12, 0x34, 0x27, 0x12, 0x56, 0xd3, 0xbf, 0x8d, 0x8d, 0xa2, 0x16, 0x69, 0x22, 0xe5, 0x98, 0xac, 0xac, 0x70, 0xf4, 0x12, 0xb3, 0xfe, 0x35, 0xa9, 0x41, 0x90, 0xad, 0x0a, 0xe2, 0xe8, 0xec, 0x62, 0x13, 0x48, 0x19, 0xab, 0x61, 0xad, 0xdc, 0xcc, 0xfe, 0x99, 0xd8, 0x67, 0xca, 0x3d, 0x73, 0x18, 0x3f, 0xa3, 0xfd])
},{
    key: new Int32Array([0x0f, 0x62, 0xb5, 0x08, 0x5b, 0xae, 0x01, 0x54, 0xa7, 0xfa, 0x4d, 0xa0, 0xf3, 0x46, 0x99, 0xec, 0x3f, 0x92, 0xe5, 0x38, 0x8b, 0xde, 0x31, 0x84, 0xd7, 0x2a, 0x7d, 0xd0, 0x23, 0x76, 0xc9, 0x1c]),
    iv: new Int32Array([0x28, 0x8f, 0xf6, 0x5d, 0xc4, 0x2b, 0x92, 0xf9]),
    plain_text: new Int32Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
    cipher_text: new Int32Array([0xdb, 0x16, 0x58, 0x14, 0xf6, 0x67, 0x33, 0xb7, 0xa8, 0xe3, 0x4d, 0x1f, 0xfc, 0x12, 0x34, 0x27, 0x12, 0x56, 0xd3, 0xbf, 0x8d, 0x8d, 0xa2, 0x16, 0x69, 0x22, 0xe5, 0x98, 0xac, 0xac, 0x70, 0xf4, 0x12, 0xb3, 0xfe, 0x35, 0xa9, 0x41, 0x90, 0xad, 0x0a, 0xe2, 0xe8, 0xec, 0x62, 0x13, 0x48, 0x19, 0xab, 0x61, 0xad, 0xdc, 0xcc, 0xfe, 0x99, 0xd8, 0x67, 0xca, 0x3d, 0x73, 0x18, 0x3f, 0xa3, 0xfd, 0x82, 0x87, 0x0F])
},{
    key: new Int32Array([0x0f, 0x62, 0xb5, 0x08, 0x5b, 0xae, 0x01, 0x54, 0xa7, 0xfa, 0x4d, 0xa0, 0xf3, 0x46, 0x99, 0xec, 0x3f, 0x92, 0xe5, 0x38, 0x8b, 0xde, 0x31, 0x84, 0xd7, 0x2a, 0x7d, 0xd0, 0x23, 0x76, 0xc9, 0x1c]),
    iv: new Int32Array([0x28, 0x8f, 0xf6, 0x5d, 0xc4, 0x2b, 0x92, 0xf9]),
    plain_text: new Int32Array([0x00]),
    cipher_text: new Int32Array([0xdb])
}];

describe('Cacha8 algorithm', function () {
    it('transform a string with chacha8 algorithm based on a nounce and key', function() {
        for (let i = 0; i < testdata.length; i++) {
            let d = testdata[i];
            let expected = d['cipher_text'];
            let cipherResult = new Chacha8(d['key'], d['iv'], d['plain_text']);

            expect(expected).to.eql(cipherResult);
        }
    });

    it('use chacha algo with wrong nounce length', function() {
        
        let d = testdata[0];
        let wrongIv = new Int16Array([0x28, 0x8f, 0xf6, 0x5d, 0xc4, 0x2b, 0x92]);


        expect(() => new Chacha8(d['key'], wrongIv, d['plain_text'])).to.throw('wrong nonce length (needs to be 8)');
    });

    it('cut cipher', function() {
        
        let d = testdata[0];
        let expected = new Int32Array([0x65]);
        let cipherResult = new Chacha8(d['key'], d['iv'], d['plain_text'], 1);

        expect(expected).to.eql(cipherResult);
    });
});