public void TestAesHmac()
{
byte[] hmac = AesStatic.GenerateKey();
byte[] key = AesStatic.GenerateKey();
byte[] iv = AesStatic.GenerateIV();
Random random = new Random();
byte[] plaintext = new byte[69854];
random.NextBytes(plaintext);
PacketBuffer ciphertext = PacketBuffer.CreateDynamic();
AesStatic.EncryptWithHmac(plaintext, ciphertext, false, hmac, key);
ciphertext.Position = 0;
byte[] result = AesStatic.DecryptWithHmac(ciphertext, -1, hmac, key);
CollectionAssert.AreEqual(plaintext, result);
}
internal AesShaStream(Stream stream, byte[] key, CryptoStreamMode mode, CryptographicOperation operation) : base(stream, mode)
{
this.key = key ?? throw new ArgumentNullException(nameof(key));
if (key.Length != 32)
{
throw new ArgumentOutOfRangeException(nameof(key), key.Length, "The AES key must have a length of 256 bit.");
}
if (operation == CryptographicOperation.Encrypt)
{
iv = AesStatic.GenerateIV();
}
else if (operation != CryptographicOperation.Decrypt)
{
throw new NotSupportedException("This stream does not support cryptographic operations other than encrypt and decrypt.");
}
this.operation = operation;
csp = Aes.Create();
sha = SHA256.Create();
}
public void TestAes()
{
byte[] key = AesStatic.GenerateKey();
Assert.IsNotNull(key);
byte[] iv = AesStatic.GenerateIV();
Assert.IsNotNull(iv);
Random random = new Random();
byte[] plaintext = new byte[45674];
random.NextBytes(plaintext);
byte[] ciphertext = AesStatic.Encrypt(plaintext, key, iv);
Assert.IsNotNull(ciphertext);
Assert.AreEqual(ciphertext.Length, Util.GetTotalSize(plaintext.Length, 16));
byte[] decrypted = AesStatic.Decrypt(ciphertext, key, iv);
Assert.IsNotNull(decrypted);
CollectionAssert.AreEqual(plaintext, decrypted);
}
private void btnAesGenerateIV_Click(object sender, EventArgs e) => tbAesIV.Text = Util.ToHexString(AesStatic.GenerateIV());
