@confluentinc/schemaregistry/dist/rules/encryption/localkms/local-client.js

Node.js client for Confluent Schema Registry

"use strict";
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}));
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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});
var __importStar = (this && this.__importStar) || (function () {
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})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.LocalKmsClient = void 0;
const encrypt_executor_1 = require("../encrypt-executor");
const Hkdf = __importStar(require("../tink/hkdf"));
const local_driver_1 = require("./local-driver");
const aes_gcm_pb_1 = require("../tink/proto/aes_gcm_pb");
const protobuf_1 = require("@bufbuild/protobuf");
class LocalKmsClient {
    constructor(secret) {
        this.secret = secret;
        this.cryptor = new encrypt_executor_1.Cryptor(encrypt_executor_1.DekFormat.AES128_GCM);
    }
    async getKey() {
        const rawKey = await Hkdf.compute(16, 'SHA-256', Buffer.from(this.secret, 'utf8'), new Uint8Array(0));
        const aesGcmKey = (0, protobuf_1.create)(aes_gcm_pb_1.AesGcmKeySchema, {
            version: 0,
            keyValue: rawKey
        });
        return Buffer.from((0, protobuf_1.toBinary)(aes_gcm_pb_1.AesGcmKeySchema, aesGcmKey));
    }
    supported(keyUri) {
        return keyUri.startsWith(local_driver_1.LocalKmsDriver.PREFIX);
    }
    async encrypt(plaintext) {
        return this.cryptor.encrypt(await this.getKey(), plaintext);
    }
    async decrypt(ciphertext) {
        return this.cryptor.decrypt(await this.getKey(), ciphertext);
    }
}
exports.LocalKmsClient = LocalKmsClient;