@launchdarkly/js-server-sdk-common-edge/dist/esm/src/platform/crypto/cryptoJSHmac.js

LaunchDarkly Server SDK for JavaScript - common Edge SDK code

import CryptoJS from 'crypto-js';
export default class CryptoJSHmac {
    constructor(algorithm, key) {
        let algo;
        switch (algorithm) {
            case 'sha1':
                algo = CryptoJS.algo.SHA1;
                break;
            case 'sha256':
                algo = CryptoJS.algo.SHA256;
                break;
            default:
                throw new Error('unsupported hash algorithm. Only sha1 and sha256 are supported.');
        }
        this._cryptoJSHmac = CryptoJS.algo.HMAC.create(algo, key);
    }
    digest(encoding) {
        const result = this._cryptoJSHmac.finalize();
        if (encoding === 'base64') {
            return result.toString(CryptoJS.enc.Base64);
        }
        if (encoding === 'hex') {
            return result.toString(CryptoJS.enc.Hex);
        }
        throw new Error('unsupported output encoding. Only base64 and hex are supported.');
    }
    update(data) {
        this._cryptoJSHmac.update(data);
        return this;
    }
}
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