/// <summary>
/// Calculate MAC value.
/// </summary>
/// <param name="pduBytes">PDU encoded as byte array</param>
/// <param name="macAlgorithm">MAC algorithm</param>
/// <param name="key">HMAC key</param>
private static DataHash CalcMacValue(byte[] pduBytes, HashAlgorithm macAlgorithm, byte[] key)
{
byte[] target = pduBytes.Length < macAlgorithm.Length ? new byte[0] : new byte[pduBytes.Length - macAlgorithm.Length];
Array.Copy(pduBytes, 0, target, 0, target.Length);
IHmacHasher hasher = KsiProvider.CreateHmacHasher(macAlgorithm);
return(hasher.GetHash(key, target));
}
public void GetHmacHasherTest()
{
IHmacHasher hasher = KsiProvider.CreateHmacHasher(HashAlgorithm.Sha2256);
Assert.IsNotNull(hasher);
}
/// <summary>
/// Calculate MAC for data with given key.
/// </summary>
/// <param name="macAlgorithm">MAC algorithm</param>
/// <param name="key">hmac key</param>
/// <param name="data">data to calculate MAC from</param>
/// <returns>mac data hash</returns>
private static DataHash CalculateMac(HashAlgorithm macAlgorithm, byte[] key, byte[] data)
{
IHmacHasher hasher = KsiProvider.CreateHmacHasher(macAlgorithm);
return(hasher.GetHash(key, data));
}