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"use strict";
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 (_) 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 });
/** */
var stream_1 = require("stream");
var crypto_1 = require("crypto");
var NodeCryptography = /** @class */ (function () {
function NodeCryptography() {
}
Object.defineProperty(NodeCryptography.prototype, "algo", {
get: function () {
return 'aes-256-cbc';
},
enumerable: false,
configurable: true
});
NodeCryptography.prototype.encrypt = function (key, input) {
return __awaiter(this, void 0, void 0, function () {
var bKey;
return __generator(this, function (_a) {
bKey = this.getKey(key);
if (input instanceof Buffer) {
return [2 /*return*/, this.encryptBuffer(bKey, input)];
}
if (input instanceof stream_1.Readable) {
return [2 /*return*/, this.encryptStream(bKey, input)];
}
if (typeof input === 'string') {
return [2 /*return*/, this.encryptString(bKey, input)];
}
throw new Error('Unsupported input format');
});
});
};
NodeCryptography.prototype.decrypt = function (key, input) {
return __awaiter(this, void 0, void 0, function () {
var bKey;
return __generator(this, function (_a) {
bKey = this.getKey(key);
if (input instanceof Buffer) {
return [2 /*return*/, this.decryptBuffer(bKey, input)];
}
if (input instanceof stream_1.Readable) {
return [2 /*return*/, this.decryptStream(bKey, input)];
}
if (typeof input === 'string') {
return [2 /*return*/, this.decryptString(bKey, input)];
}
throw new Error('Unsupported input format');
});
});
};
NodeCryptography.prototype.encryptFile = function (key, file, File) {
return __awaiter(this, void 0, void 0, function () {
var bKey, _a, _b, _c, _d;
var _e, _f;
return __generator(this, function (_g) {
switch (_g.label) {
case 0:
bKey = this.getKey(key);
if (!(file.data instanceof Buffer)) return [3 /*break*/, 2];
_b = (_a = File).create;
_e = {
name: file.name,
mimeType: 'application/octet-stream'
};
return [4 /*yield*/, this.encryptBuffer(bKey, file.data)];
case 1: return [2 /*return*/, _b.apply(_a, [(_e.data = _g.sent(),
_e)])];
case 2:
if (!(file.data instanceof stream_1.Readable)) return [3 /*break*/, 4];
_d = (_c = File).create;
_f = {
name: file.name,
mimeType: 'application/octet-stream'
};
return [4 /*yield*/, this.encryptStream(bKey, file.data)];
case 3: return [2 /*return*/, _d.apply(_c, [(_f.stream = _g.sent(),
_f)])];
case 4: throw new Error('Cannot encrypt this file. In Node.js file encryption supports only string, Buffer or Stream.');
}
});
});
};
NodeCryptography.prototype.decryptFile = function (key, file, File) {
return __awaiter(this, void 0, void 0, function () {
var bKey, _a, _b, _c, _d;
var _e, _f;
return __generator(this, function (_g) {
switch (_g.label) {
case 0:
bKey = this.getKey(key);
if (!(file.data instanceof Buffer)) return [3 /*break*/, 2];
_b = (_a = File).create;
_e = {
name: file.name
};
return [4 /*yield*/, this.decryptBuffer(bKey, file.data)];
case 1: return [2 /*return*/, _b.apply(_a, [(_e.data = _g.sent(),
_e)])];
case 2:
if (!(file.data instanceof stream_1.Readable)) return [3 /*break*/, 4];
_d = (_c = File).create;
_f = {
name: file.name
};
return [4 /*yield*/, this.decryptStream(bKey, file.data)];
case 3: return [2 /*return*/, _d.apply(_c, [(_f.stream = _g.sent(),
_f)])];
case 4: throw new Error('Cannot decrypt this file. In Node.js file decryption supports only string, Buffer or Stream.');
}
});
});
};
NodeCryptography.prototype.getKey = function (key) {
var sha = (0, crypto_1.createHash)('sha256');
sha.update(Buffer.from(key, 'utf8'));
return Buffer.from(sha.digest('hex').slice(0, 32), 'utf8');
};
NodeCryptography.prototype.getIv = function () {
return (0, crypto_1.randomBytes)(NodeCryptography.IV_LENGTH);
};
NodeCryptography.prototype.encryptString = function (key, plaintext) {
var bIv = this.getIv();
var bPlaintext = Buffer.from(plaintext);
var aes = (0, crypto_1.createCipheriv)(this.algo, key, bIv);
return Buffer.concat([bIv, aes.update(bPlaintext), aes.final()]).toString('utf8');
};
NodeCryptography.prototype.decryptString = function (key, sCiphertext) {
var ciphertext = Buffer.from(sCiphertext);
var bIv = ciphertext.slice(0, NodeCryptography.IV_LENGTH);
var bCiphertext = ciphertext.slice(NodeCryptography.IV_LENGTH);
var aes = (0, crypto_1.createDecipheriv)(this.algo, key, bIv);
return Buffer.concat([aes.update(bCiphertext), aes.final()]).toString('utf8');
};
NodeCryptography.prototype.encryptBuffer = function (key, plaintext) {
var bIv = this.getIv();
var aes = (0, crypto_1.createCipheriv)(this.algo, key, bIv);
return Buffer.concat([bIv, aes.update(plaintext), aes.final()]);
};
NodeCryptography.prototype.decryptBuffer = function (key, ciphertext) {
var bIv = ciphertext.slice(0, NodeCryptography.IV_LENGTH);
var bCiphertext = ciphertext.slice(NodeCryptography.IV_LENGTH);
var aes = (0, crypto_1.createDecipheriv)(this.algo, key, bIv);
return Buffer.concat([aes.update(bCiphertext), aes.final()]);
};
NodeCryptography.prototype.encryptStream = function (key, stream) {
var output = new stream_1.PassThrough();
var bIv = this.getIv();
var aes = (0, crypto_1.createCipheriv)(this.algo, key, bIv);
output.write(bIv);
stream.pipe(aes).pipe(output);
return output;
};
NodeCryptography.prototype.decryptStream = function (key, stream) {
var _this = this;
var output = new stream_1.PassThrough();
var bIv = Buffer.alloc(0);
var aes = null;
var getIv = function () {
var data = stream.read();
while (data !== null) {
if (data) {
var bChunk = Buffer.from(data);
var sliceLen = NodeCryptography.IV_LENGTH - bIv.byteLength;
if (bChunk.byteLength < sliceLen) {
bIv = Buffer.concat([bIv, bChunk]);
}
else {
bIv = Buffer.concat([bIv, bChunk.slice(0, sliceLen)]);
aes = (0, crypto_1.createDecipheriv)(_this.algo, key, bIv);
aes.pipe(output);
aes.write(bChunk.slice(sliceLen));
}
}
data = stream.read();
}
};
stream.on('readable', getIv);
stream.on('end', function () {
if (aes) {
aes.end();
}
output.end();
});
return output;
};
NodeCryptography.IV_LENGTH = 16;
return NodeCryptography;
}());
exports.default = NodeCryptography;