Generating SHA Mac Using Java

A team member was struggling to get this working recently, and noted that the examples he encountered on the Internet didn’t seem to be correct.

Heres the ‘working’ example that we have put in place – open to feedback if something silly is being done.

public static String generateHMac( String key, String baseString ) throws UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException {
SecretKeySpec secret = new SecretKeySpec(key.getBytes(), "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");

byte[] resultArray = mac.doFinal(baseString.getBytes("UTF-8"));
byte[] hexBytes = new Hex().encode(resultArray);
return new String(hexBytes, "UTF-8");

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