public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
byte[] numArray = Ensure.Type <byte[]>(key, "AesKeyWrap management algorithm expectes key to be byte[] array.", new object[0]);
Ensure.BitSize(numArray, this.kekLengthBits, string.Format("AesKeyWrap management algorithm expected key of size {0} bits, but was given {1} bits", this.kekLengthBits, (int)numArray.Length * 8), new object[0]);
return(AesKeyWrap.Unwrap(encryptedCek, numArray));
}