PHP HMAC SHA256 Hashing

问题

im trying to recreate a script from Java to PHP

Usually in php we do hash_mac('sha256',string,key) But the generated signature in php doesnt match the java one...

Here is the java algo:

  Mac localMac = getValidMac();
  localMac.init(new SecretKeySpec(str1.getBytes("UTF-8"), localMac.getAlgorithm()));
  byte[] arrayOfByte = localMac.doFinal(paramString.getBytes());
  BigInteger localBigInteger = new BigInteger(1, arrayOfByte);
  String str4 = String.format("%0" + (arrayOfByte.length << 1) + "x", new Object[] { localBigInteger });
  str3 = str4;
  return str3;

Is there anything different in Java appending some strings to the key?

来源：https://stackoverflow.com/questions/13872399/php-hmac-sha256-hashing