public static void AesCcmNistTests(AEADTest testCase)
{
using (var aesCcm = new AesCcm(testCase.Key))
{
byte[] ciphertext = new byte[testCase.Plaintext.Length];
byte[] tag = new byte[testCase.Tag.Length];
aesCcm.Encrypt(testCase.Nonce, testCase.Plaintext, ciphertext, tag, testCase.AssociatedData);
Assert.Equal(testCase.Ciphertext, ciphertext);
Assert.Equal(testCase.Tag, tag);
byte[] plaintext = new byte[testCase.Plaintext.Length];
aesCcm.Decrypt(testCase.Nonce, ciphertext, tag, plaintext, testCase.AssociatedData);
Assert.Equal(testCase.Plaintext, plaintext);
}
}
public static void Rfc8439Tests(AEADTest testCase)
{
using (var chaChaPoly = new ChaCha20Poly1305(testCase.Key))
{
byte[] ciphertext = new byte[testCase.Plaintext.Length];
byte[] tag = new byte[testCase.Tag.Length];
chaChaPoly.Encrypt(testCase.Nonce, testCase.Plaintext, ciphertext, tag, testCase.AssociatedData);
Assert.Equal(testCase.Ciphertext, ciphertext);
Assert.Equal(testCase.Tag, tag);
byte[] plaintext = new byte[testCase.Plaintext.Length];
chaChaPoly.Decrypt(testCase.Nonce, ciphertext, tag, plaintext, testCase.AssociatedData);
Assert.Equal(testCase.Plaintext, plaintext);
}
}
public static void Rfc8439TestsTamperTag(AEADTest testCase)
{
using (var chaChaPoly = new ChaCha20Poly1305(testCase.Key))
{
byte[] ciphertext = new byte[testCase.Plaintext.Length];
byte[] tag = new byte[testCase.Tag.Length];
chaChaPoly.Encrypt(testCase.Nonce, testCase.Plaintext, ciphertext, tag, testCase.AssociatedData);
Assert.Equal(testCase.Ciphertext, ciphertext);
Assert.Equal(testCase.Tag, tag);
tag[0] ^= 1;
byte[] plaintext = RandomNumberGenerator.GetBytes(testCase.Plaintext.Length);
Assert.Throws <CryptographicException>(
() => chaChaPoly.Decrypt(testCase.Nonce, ciphertext, tag, plaintext, testCase.AssociatedData));
Assert.Equal(new byte[plaintext.Length], plaintext);
}
}
public static void AesCcmNistTestsTamperCiphertext(AEADTest testCase)
{
using (var aesCcm = new AesCcm(testCase.Key))
{
byte[] ciphertext = new byte[testCase.Plaintext.Length];
byte[] tag = new byte[testCase.Tag.Length];
aesCcm.Encrypt(testCase.Nonce, testCase.Plaintext, ciphertext, tag, testCase.AssociatedData);
Assert.Equal(testCase.Ciphertext, ciphertext);
Assert.Equal(testCase.Tag, tag);
ciphertext[0] ^= 1;
byte[] plaintext = new byte[testCase.Plaintext.Length];
RandomNumberGenerator.Fill(plaintext);
Assert.Throws <CryptographicException>(
() => aesCcm.Decrypt(testCase.Nonce, ciphertext, tag, plaintext, testCase.AssociatedData));
Assert.Equal(new byte[plaintext.Length], plaintext);
}
}
