e2ee-ts
Version:
A module that provides RSA & AES encryption interfaces
171 lines • 7.56 kB
JavaScript
;
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 };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.AESClient = void 0;
var crypto_1 = require("crypto");
var AESClient = /** @class */ (function () {
function AESClient() {
}
AESClient.prototype.init = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (resolve, reject) {
crypto_1.webcrypto.subtle
.generateKey({
name: "AES-GCM",
length: 256,
}, true, // exportable
["encrypt", "decrypt"])
.then(function (key) {
_this._key = key;
resolve();
})
.catch(function (e) {
_this._key = undefined;
reject(e);
});
})];
});
});
};
/**
* Exports this object's public key so that the client can
* encrypt their data using this person's public key
*/
AESClient.prototype.exportKey = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (resolve, reject) {
if (!_this._key)
return reject("Error while exporting: No key found.");
crypto_1.webcrypto.subtle
.exportKey("raw", _this._key)
.then(function (keyBuffer) {
resolve(keyBuffer);
})
.catch(function (e) {
reject(e);
});
})];
});
});
};
/**
* Loads the ArrayBuffer representing the key
* to this object, can only be used to decrypt
*/
AESClient.prototype.importBufferKey = function (bufferKey) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (resolve, reject) {
crypto_1.webcrypto.subtle
.importKey("raw", bufferKey, {
name: "AES-GCM",
}, false, ["decrypt"])
.then(function (importedKey) {
_this._key = importedKey;
resolve();
})
.catch(function (e) { return reject(e); });
})];
});
});
};
/**
* Encrypts BufferSource using the secret key
*/
AESClient.prototype.encrypt = function (data, tagLength) {
var _this = this;
if (tagLength === void 0) { tagLength = 128; }
return new Promise(function (resolve, reject) {
if (!_this._key)
return reject("Error while encrypting: No key found.");
var iv = (0, crypto_1.getRandomValues)(new Uint8Array(12));
crypto_1.webcrypto.subtle
.encrypt({
name: "AES-GCM",
iv: iv,
tagLength: tagLength,
}, _this._key, data)
.then(function (encryptedData) {
resolve({
data: encryptedData,
iv: iv,
});
})
.catch(function (e) {
reject(e);
});
});
};
/**
* Decrypts ArrayBuffer using the secret key
*/
AESClient.prototype.decrypt = function (data, iv, tagLength) {
var _this = this;
if (tagLength === void 0) { tagLength = 128; }
return new Promise(function (resolve, reject) {
if (!_this._key)
return reject("Error while decrypting: No key found.");
crypto_1.webcrypto.subtle
.decrypt({
name: "AES-GCM",
iv: iv,
tagLength: tagLength,
}, _this._key, data)
.then(function (decryptedData) {
resolve(decryptedData);
})
.catch(function (e) { return reject(e); });
});
};
AESClient.prototype.arrayBufferToString = function (buffer) {
var binary = "";
var bytes = new Uint8Array(buffer);
for (var i = 0; i < bytes.byteLength; i++) {
binary += String.fromCharCode(bytes[i]);
}
return binary;
};
return AESClient;
}());
exports.AESClient = AESClient;
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