hmacSha1 function

hmacSha1.scala

def hmacSha1(value: String, key: String) = {
  // Get an hmac_sha1 key from the raw key bytes
  val keyBytes = key.getBytes
  val signingKey = new SecretKeySpec(keyBytes, "HmacSHA1")

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

  // Compute the hmac on input data bytes
  val rawHmac = mac.doFinal(value.getBytes())
 
  // Convert raw bytes to Hex
  val hexBytes = new Hex().encode(rawHmac)

  //  Covert array of Hex bytes to a String
  //new String(hexBytes, "UTF-8") -- if u want a String as a result
  hexBytes // returns byte arr
}