public void Given_A_Fixed_Key_When_Data_Is_Encrypted_Then_Decryption_Return_The_Unencrypted_Data()
{
var data = Encoding.UTF8.GetBytes(nameof(FixedKeyEncryptionproviderTests));
var secret = sut.Encrypt(data);
sut.Decrypt(secret).Should().BeEquivalentTo(data);
}
public void Given_An_Incorrect_Key_Identifier_When_Decryption_Is_Attempted_Then_An_Exception_Is_Thrown()
{
var data = Encoding.UTF8.GetBytes(nameof(FixedKeyEncryptionproviderTests));
var key = GenerateKeyBytes();
var encryptionProviderWithDifferentKey = new FixedKeyEncryptionProvider(key);
var secret = sut.Encrypt(data);
Assert.Throws <KeyIdentifierMismatchException>(() => encryptionProviderWithDifferentKey.Decrypt(secret));
}
public void Given_An_Incorrect_Key_When_Decryption_Is_Attempted_Then_Decryption_Does_Not_Return_The_Unencrypted_Data()
{
var data = Encoding.UTF8.GetBytes(nameof(FixedKeyEncryptionproviderTests));
var secret = sut.Encrypt(data);
// make a new key appear to be the same by using the same identifier
var incorrectKey = new Key(GenerateKeyBytes(), secret.KeyIdentifier);
var encryptionProviderWithDifferentKey = new FixedKeyEncryptionProvider(incorrectKey);
encryptionProviderWithDifferentKey.Decrypt(secret).Should().NotBeEquivalentTo(data);
}