foreign/csharp/Shared/EncryptorTestExtensions.cs

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using Apache.Iggy.Encryption;

namespace Apache.Iggy.Shared;

/// <summary>
///     Test-support allocating wrappers over the span-based <see cref="IMessageEncryptor" /> contract.
/// </summary>
public static class EncryptorTestExtensions
{
    public static byte[] EncryptToArray(this IMessageEncryptor encryptor, ReadOnlySpan<byte> plaintext)
    {
        var ciphertext = new byte[encryptor.GetMaxEncryptedLength(plaintext.Length)];
        var written = encryptor.Encrypt(plaintext, ciphertext);
        return written == ciphertext.Length ? ciphertext : ciphertext.AsSpan(0, written).ToArray();
    }

    public static byte[] DecryptToArray(this IMessageEncryptor encryptor, ReadOnlySpan<byte> encryptedData)
    {
        var plaintext = new byte[encryptor.GetMaxDecryptedLength(encryptedData.Length)];
        var written = encryptor.Decrypt(encryptedData, plaintext);
        return written == plaintext.Length ? plaintext : plaintext.AsSpan(0, written).ToArray();
    }
}