// Skein-512-512 self test. 
// Author: Thomas Mueller, 2008-2010.
// Public domain.

package skein

object Test extends Application {
  
  val lines = scala.io.Source.fromFile("src/testVectors.txt").getLines
  while (lines.hasNext) {
    var line = lines.next
    if (line.startsWith("Len")) {
      val len = Integer.parseInt(line.split("=")(1).trim)
      val msg = toBytes(lines.next.split("=")(1).trim)
      val digest = toBytes(lines.next.split("=")(1).trim)
      test(msg, len, digest)
    }
  }
  
  def test(msg: Array[Byte], bitCount: Int, expected: Array[Byte]) = {
    val result = new Array[Byte](expected.length)
    if (msg.length == bitCount / 8) {
      Skein512.hash(msg, result)
      if (!java.util.Arrays.equals(expected, result)) {
        throw new AssertionError("bitCount=" + bitCount);
      }
    }
  }
  
  def toBytes(s: String): Array[byte] = {
    var len = s.length()
    if (len % 2 != 0) {
      throw new IllegalArgumentException(s)
    }
    len /= 2
    val buff = new Array[Byte](len)
    for (i <- 0 until len) {
      buff(i) = Integer.parseInt(s.substring(i + i, i + i + 2), 16).toByte
    }
    return buff;
  }

}