Template:Json HMACtoBASE64 Block-Java

   public static String hmacSha1ToBase64(String value, String key) throws Exception
   {

       byte[] keyBytes = key.getBytes();// Get an hmac_sha1 key from the raw key bytes
       SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");

       Mac mac = Mac.getInstance("HmacSHA1"); // Get an hmac_sha1 Mac instance and initialize with the signing key
       mac.init(signingKey);

       byte[] rawHmac = mac.doFinal(value.getBytes());// Compute the hmac on input data bytes

       byte[] base64Bytes = Base64.encodeBase64(rawHmac);// Convert raw bytes to Hex

       return new String(base64Bytes, "UTF-8");// Covert array of Hex bytes to a String
   }