fix: pass proper arguments to createHash

Refactor createHash function to include output parameter and update documentation.

Author: jankapunkt

lib/utils/crypto-util.js

@@ -3,22 +3,25 @@
 const crypto = require('crypto');
 
 /**
- * Export `StringUtil`.
+ * @module CryptoUtil
  */
 
-module.exports = {
-  /**
-   *
-   * @param algorithm {String} the hash algorithm, default is 'sha256'
-   * @param data {Buffer|String|TypedArray|DataView} the data to hash
-   * @param encoding {String|undefined} optional, the encoding to calculate the
-   *    digest
-   * @return {Buffer|String} if {encoding} undefined a {Buffer} is returned, otherwise a {String}
-   */
-  createHash: function({ algorithm = 'sha256', data = undefined, encoding = undefined }) {
-    return crypto
-      .createHash(algorithm)
-      .update(data)
-      .digest(encoding);
-  }
+/**
+ * Creates a new hash by given algorithm, data and digest encoding.
+ * Defaults to sha256 as.
+ *
+ * @function
+ * @param algorithm {string} the hash algorithm, default is 'sha256'
+ * @param data {Buffer|string|TypedArray|DataView} the data to hash
+ * @param encoding {string=} optional, the encoding of the input
+ * @param output {'base64'|'base64url'|'binary'|'hex'|undefined} optional, the desired output type
+ * @return {Buffer|string} if {output} is undefined, a {Buffer} is returned, otherwise a {String}
+ */
+const createHash = function({ algorithm = 'sha256', data, output, encoding }) {
+  return crypto
+    .createHash(algorithm)
+    .update(data, encoding)
+    .digest(output);
 };
+
+module.exports = { createHash };