Matching Java SHA2 Output vs MySQL SHA2 Output

Question

When I reproduce a SHA2 hash via the following code:

MessageDigest digest = MessageDigest.getInstance(\"SHA-256\");
digest.digest(\"A\".getBytes(\"UTF-8\"));
         


        

Answer 1

Integer.toHexString(0XFF & i) must be replaced with String.format("%02x", 0XFF & i), otherwise it only produces a 1 character output, while 2 characters are expected.