@airgap/coinlib-core
Version:
The @airgap/coinlib-core is a protocol agnostic library to prepare, sign and broadcast cryptocurrency transactions.
165 lines • 9.41 kB
JavaScript
;
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var __generator = (this && this.__generator) || function (thisArg, body) {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.AES = void 0;
var crypto = __importStar(require("crypto"));
var errors_1 = require("../errors");
var coinlib_error_1 = require("../errors/coinlib-error");
var hex_1 = require("./hex");
// https://github.com/microsoft/botbuilder-js/blob/master/libraries/botframework-config/src/encrypt.ts#L20
var AES = /** @class */ (function () {
function AES(AES_KEY_SIZE, KEY_DERIVATION_ITERATION_COUNT, ALGORITHM, encoding) {
if (AES_KEY_SIZE === void 0) { AES_KEY_SIZE = 256; }
if (KEY_DERIVATION_ITERATION_COUNT === void 0) { KEY_DERIVATION_ITERATION_COUNT = 10000; }
if (ALGORITHM === void 0) { ALGORITHM = 'aes-256-gcm'; }
if (encoding === void 0) { encoding = 'hex'; }
this.AES_KEY_SIZE = AES_KEY_SIZE;
this.KEY_DERIVATION_ITERATION_COUNT = KEY_DERIVATION_ITERATION_COUNT;
this.ALGORITHM = ALGORITHM;
this.encoding = encoding;
}
AES.prototype.encryptString = function (plainText, privateKey) {
return __awaiter(this, void 0, void 0, function () {
var keyBytes, ivBytes, ivText, cipher, encryptedValue, authTagText;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!plainText || plainText.length === 0) {
throw new errors_1.ConditionViolationError(coinlib_error_1.Domain.UTILS, 'you must pass an input message');
}
if (!privateKey || privateKey.length === 0) {
throw new errors_1.ConditionViolationError(coinlib_error_1.Domain.UTILS, 'you must pass a privateKey');
}
return [4 /*yield*/, this.deriveKeyFromPrivateKey(privateKey)
// Generates 16 byte cryptographically strong pseudo-random data as IV
// https://nodejs.org/api/crypto.html#crypto_crypto_randombytes_size_callback
];
case 1:
keyBytes = _a.sent();
ivBytes = crypto.randomBytes(16);
ivText = ivBytes.toString(this.encoding);
cipher = crypto.createCipheriv(this.ALGORITHM, keyBytes, ivBytes);
encryptedValue = cipher.update(plainText, 'utf8', this.encoding);
encryptedValue += cipher.final(this.encoding);
authTagText = cipher.getAuthTag().toString(this.encoding);
return [2 /*return*/, "".concat(ivText, "!").concat(encryptedValue, "!").concat(authTagText)];
}
});
});
};
AES.prototype.decryptString = function (encryptedValue, privateKey) {
return __awaiter(this, void 0, void 0, function () {
var parts, ivText, encryptedText, authTagText, ivBytes, keyBytes, authTagBytes, decipher, value;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!encryptedValue || encryptedValue.length === 0) {
return [2 /*return*/, encryptedValue];
}
if (!privateKey || privateKey.length === 0) {
throw new errors_1.ConditionViolationError(coinlib_error_1.Domain.UTILS, 'you must pass a privateKey');
}
parts = encryptedValue.split('!');
if (parts.length !== 3) {
throw new errors_1.ConditionViolationError(coinlib_error_1.Domain.UTILS, 'The encrypted value is not in a valid format');
}
ivText = parts[0];
encryptedText = parts[1];
authTagText = parts[2];
ivBytes = Buffer.from(ivText, this.encoding);
return [4 /*yield*/, this.deriveKeyFromPrivateKey(privateKey)];
case 1:
keyBytes = _a.sent();
authTagBytes = Buffer.from(authTagText, this.encoding);
if (ivBytes.length !== 16) {
throw new errors_1.InvalidValueError(coinlib_error_1.Domain.UTILS, 'The IV length is invalid');
}
if (keyBytes.length !== 32) {
throw new errors_1.InvalidValueError(coinlib_error_1.Domain.UTILS, 'The key length is invalid');
}
if (authTagBytes.length !== 16) {
throw new errors_1.InvalidValueError(coinlib_error_1.Domain.UTILS, 'The authtag length is invalid');
}
decipher = crypto.createDecipheriv(this.ALGORITHM, keyBytes, ivBytes);
decipher.setAuthTag(authTagBytes);
value = decipher.update(encryptedText, this.encoding, 'utf8');
value += decipher.final('utf8');
return [2 /*return*/, value];
}
});
});
};
AES.prototype.deriveKeyFromPrivateKey = function (privateKey) {
var _this = this;
var password = (0, hex_1.isHex)(privateKey) ? Buffer.from(privateKey, 'hex') : privateKey;
return new Promise(function (resolve, reject) {
crypto.pbkdf2(password, '', _this.KEY_DERIVATION_ITERATION_COUNT, 32, 'sha512', function (pbkdf2Error, key) {
if (pbkdf2Error) {
reject(pbkdf2Error);
}
resolve(key);
});
});
};
return AES;
}());
exports.AES = AES;
//# sourceMappingURL=AES.js.map