js-crypto-aes
Version:
Universal Module for AES Encryption and Decryption in JavaScript
232 lines • 12.4 kB
JavaScript
;
/**
* aes.js
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.unwrapKey = exports.wrapKey = exports.decrypt = exports.encrypt = void 0;
var util = __importStar(require("js-crypto-env"));
var nodeapi = __importStar(require("./nodeapi"));
var webapi = __importStar(require("./webapi"));
var params_1 = __importDefault(require("./params"));
/**
* Check if the given algorithm spec is valid.
* @param {String} name - Name of the specified algorithm like 'AES-GCM'.
* @param {Uint8Array} iv - IV byte array if required
* @param {Number} tagLength - Authentication tag length if required
* @throws {Error} - Throws if UnsupportedAlgorithm, InvalidArguments, InvalidIVLength, or InvalidTagLength.
*/
var assertAlgorithms = function (_a) {
var name = _a.name, iv = _a.iv, tagLength = _a.tagLength;
if (params_1.default.ciphers[name].ivLength) {
if (!(iv instanceof Uint8Array))
throw new Error('InvalidArguments');
if (iv.byteLength < 2 || iv.byteLength > 16)
throw new Error('InvalidIVLength');
if (params_1.default.ciphers[name].staticIvLength && (params_1.default.ciphers[name].ivLength !== iv.byteLength))
throw new Error('InvalidIVLength');
}
if (params_1.default.ciphers[name].tagLength && tagLength) {
if (!Number.isInteger(tagLength))
throw new Error('InvalidArguments');
if (tagLength < 4 || tagLength > 16)
throw new Error('InvalidTagLength');
}
};
/**
* Encrypt data with AES
* @param {Uint8Array} msg - Message to be encrypted.
* @param {Uint8Array} key - The symmetric key used to encrypt the message.
* @param {String} [name = 'AES-GCM'] - Name of the specified algorithm like 'AES-GCM'.
* @param {Uint8Array} [iv] - Byte array of the initial vector if required.
* @param {Uint8Array} [additionalData = new Uint8Array([])] - Byte array of additional data if required.
* @param {Number} [tagLength = params.ciphers[name].tagLength] - Authentication tag length if required.
* @return {Promise<Uint8Array>} - Encrypted message.
* @throws {Error} - Throws if InvalidArguments, FaildToEncryptWeb/Node, or UnsupportedEnvironment (no webcrypto/nodecrypto).
*/
var encrypt = function (msg, key, _a) {
var _b = _a.name, name = _b === void 0 ? 'AES-GCM' : _b, iv = _a.iv, _c = _a.additionalData, additionalData = _c === void 0 ? new Uint8Array([]) : _c, tagLength = _a.tagLength;
return __awaiter(void 0, void 0, void 0, function () {
var env;
return __generator(this, function (_d) {
// assertion and sanitizing
assertAlgorithms({ name: name, iv: iv, tagLength: tagLength });
if (params_1.default.ciphers[name].tagLength && !tagLength)
tagLength = params_1.default.ciphers[name].tagLength;
env = util.getCrypto();
if (env.name === 'webCrypto') { // for web API
if (typeof env.crypto.importKey !== 'function' || typeof env.crypto.encrypt !== 'function')
throw new Error('UnsupportedWebCrypto');
return [2 /*return*/, webapi.encrypt(msg, key, { name: name, iv: iv, additionalData: additionalData, tagLength: tagLength }, env.crypto)];
}
else if (env.name === 'nodeCrypto') { // for node
return [2 /*return*/, nodeapi.encrypt(msg, key, { name: name, iv: iv, additionalData: additionalData, tagLength: tagLength }, env.crypto)];
}
else
throw new Error('UnsupportedEnvironment'); // TODO:fallback to native implementation
return [2 /*return*/];
});
});
};
exports.encrypt = encrypt;
/**
* Decrypt data with AES
* @param {Uint8Array} data - Byte array of encrypted data.
* @param {Uint8Array} key - Byte array of symmetric key to be used for decryption.
* @param {String} [name = 'AES-GCM'] - Name of the specified algorithm like 'AES-GCM'.
* @param {Uint8Array} [iv] - Byte array of the initial vector if required.
* @param {Uint8Array} [additionalData = new Uint8Array([])] - Byte array of additional data if required.
* @param {Number} [tagLength = params.ciphers[name].tagLength] - Authentication tag length if required.
* @return {Promise<Uint8Array>} - Decrypted plaintext message.
* @throws {Error} - Throws if InvalidArguments, FailedToDecryptWeb/Node, or UnsupportedEnvironment (no webcrypto/nodecrypto).
*/
var decrypt = function (data, key, _a) {
var _b = _a.name, name = _b === void 0 ? 'AES-GCM' : _b, iv = _a.iv, _c = _a.additionalData, additionalData = _c === void 0 ? new Uint8Array([]) : _c, tagLength = _a.tagLength;
return __awaiter(void 0, void 0, void 0, function () {
var env;
return __generator(this, function (_d) {
// assertion and sanitizing
assertAlgorithms({ name: name, iv: iv, tagLength: tagLength });
if (params_1.default.ciphers[name].tagLength && !tagLength)
tagLength = params_1.default.ciphers[name].tagLength;
env = util.getCrypto();
if (env.name === 'webCrypto') { // for web API
if (typeof env.crypto.importKey !== 'function' || typeof env.crypto.decrypt !== 'function')
throw new Error('UnsupportedWebCrypto');
return [2 /*return*/, webapi.decrypt(data, key, { name: name, iv: iv, additionalData: additionalData, tagLength: tagLength }, env.crypto)];
}
else if (env.name === 'nodeCrypto') { // for node
return [2 /*return*/, nodeapi.decrypt(data, key, { name: name, iv: iv, additionalData: additionalData, tagLength: tagLength }, env.crypto)];
}
else
throw new Error('UnsupportedEnvironment');
return [2 /*return*/];
});
});
};
exports.decrypt = decrypt;
/**
* AES-KW wrapping
* @param keyToBeWrapped {Uint8Array} - key bytes to be wrapped
* @param wrappingKey {Uint8Array} - wrapping key encryption key
* @param name {'AES-KW'} - this is simply for future extension
* @return {Promise<Uint8Array>} - output wrapped key
*/
var wrapKey = function (keyToBeWrapped, wrappingKey, _a) {
var name = _a.name;
return __awaiter(void 0, void 0, void 0, function () {
var env, iv;
return __generator(this, function (_b) {
// assertion
if (keyToBeWrapped.length % 8 > 0)
throw new Error('WrappedKeyMustBeMultipleOf8');
env = util.getCrypto();
iv = (params_1.default.wrapKeys['AES-KW'].defaultIv);
if (env.name === 'webCrypto') { // for web API
if (typeof env.crypto.importKey !== 'function' || typeof env.crypto.wrapKey !== 'function')
throw new Error('UnsupportedWebCrypto');
return [2 /*return*/, webapi.wrapKey(keyToBeWrapped, wrappingKey, { name: name, iv: iv }, env.crypto)];
}
else if (env.name === 'nodeCrypto') { // for node
return [2 /*return*/, nodeapi.wrapKey(keyToBeWrapped, wrappingKey, { name: name, iv: iv }, env.crypto)];
}
else {
throw new Error('UnsupportedEnvironment'); // TODO:fallback to native implementation
}
return [2 /*return*/];
});
});
};
exports.wrapKey = wrapKey;
/**
* AES-KW unwrapping
* @param wrappedKey {Uint8Array} - wrapped key bytes
* @param wrappingKey {Uint8Array} - wrapping key encryption key
* @param name {'AES-KW'} - this is simply for future extension
* @return {Promise<Uint8Array>} - output unwrapped key
*/
var unwrapKey = function (wrappedKey, wrappingKey, _a) {
var name = _a.name;
return __awaiter(void 0, void 0, void 0, function () {
var env, iv;
return __generator(this, function (_b) {
env = util.getCrypto();
iv = (params_1.default.wrapKeys['AES-KW'].defaultIv);
if (env.name === 'webCrypto') { // for web API
if (typeof env.crypto.importKey !== 'function' || typeof env.crypto.unwrapKey !== 'function')
throw new Error('UnsupportedWebCrypto');
return [2 /*return*/, webapi.unwrapKey(wrappedKey, wrappingKey, { name: name, iv: iv }, env.crypto)];
}
else if (env.name === 'nodeCrypto') { // for node
return [2 /*return*/, nodeapi.unwrapKey(wrappedKey, wrappingKey, { name: name, iv: iv }, env.crypto)];
}
else {
throw new Error('UnsupportedEnvironment'); // TODO:fallback to native implementation
}
return [2 /*return*/];
});
});
};
exports.unwrapKey = unwrapKey;
//# sourceMappingURL=aes.js.map