87 lines
3.2 KiB
JavaScript
87 lines
3.2 KiB
JavaScript
const openpgp = typeof window !== 'undefined' && window.openpgp ? window.openpgp : require('../..');
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const crypto = require('../../src/crypto');
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const util = require('../../src/util');
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const sandbox = require('sinon/lib/sinon/sandbox');
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const chai = require('chai');
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chai.use(require('chai-as-promised'));
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const expect = chai.expect;
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module.exports = () => describe('Symmetric AES-GCM (experimental)', function() {
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let sinonSandbox;
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let getWebCryptoStub;
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let getNodeCryptoStub;
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beforeEach(function () {
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sinonSandbox = sandbox.create();
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enableNative();
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});
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afterEach(function () {
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sinonSandbox.restore();
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});
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const disableNative = () => {
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enableNative();
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// stubbed functions return undefined
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getWebCryptoStub = sinonSandbox.stub(util, 'getWebCrypto');
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getNodeCryptoStub = sinonSandbox.stub(util, 'getNodeCrypto');
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};
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const enableNative = () => {
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getWebCryptoStub && getWebCryptoStub.restore();
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getNodeCryptoStub && getNodeCryptoStub.restore();
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};
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function testAESGCM(plaintext, nativeEncrypt, nativeDecrypt) {
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const aesAlgos = Object.keys(openpgp.enums.symmetric).filter(
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algo => algo.substr(0,3) === 'aes'
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);
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aesAlgos.forEach(function(algo) {
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it(algo, async function() {
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const nodeCrypto = util.getNodeCrypto();
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const webCrypto = util.getWebCrypto();
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if (!nodeCrypto && !webCrypto) {
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this.skip(); // eslint-disable-line no-invalid-this
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}
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const key = await crypto.generateSessionKey(algo);
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const iv = await crypto.random.getRandomBytes(crypto.mode.gcm.ivLength);
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const nativeEncryptSpy = webCrypto ? sinonSandbox.spy(webCrypto, 'encrypt') : sinonSandbox.spy(nodeCrypto, 'createCipheriv');
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const nativeDecryptSpy = webCrypto ? sinonSandbox.spy(webCrypto, 'decrypt') : sinonSandbox.spy(nodeCrypto, 'createDecipheriv');
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nativeEncrypt || disableNative();
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let modeInstance = await crypto.mode.gcm(algo, key);
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const ciphertext = await modeInstance.encrypt(util.stringToUint8Array(plaintext), iv);
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enableNative();
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nativeDecrypt || disableNative();
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modeInstance = await crypto.mode.gcm(algo, key);
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const decrypted = await modeInstance.decrypt(util.stringToUint8Array(util.uint8ArrayToString(ciphertext)), iv);
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enableNative();
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const decryptedStr = util.uint8ArrayToString(decrypted);
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expect(decryptedStr).to.equal(plaintext);
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if (algo !== 'aes192') { // not implemented by webcrypto
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// sanity check: native crypto was indeed on/off
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expect(nativeEncryptSpy.called).to.equal(nativeEncrypt);
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expect(nativeDecryptSpy.called).to.equal(nativeDecrypt);
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}
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});
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});
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}
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describe('Symmetric AES-GCM (native)', function() {
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testAESGCM('12345678901234567890123456789012345678901234567890', true, true);
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});
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describe('Symmetric AES-GCM (asm.js fallback)', function() {
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testAESGCM('12345678901234567890123456789012345678901234567890', false, false);
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});
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describe('Symmetric AES-GCM (native encrypt, asm.js decrypt)', function() {
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testAESGCM('12345678901234567890123456789012345678901234567890', true, false);
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});
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});
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