93 lines
2.8 KiB
C#
93 lines
2.8 KiB
C#
using System;
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using System.Text;
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using System.Collections.Generic;
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using NUnit.Framework;
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using System.Linq;
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using Sarand.Net.Standard.Base.Data;
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namespace Sacs.UnitTests.Net.Standard.Base.Data
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{
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[TestFixture]
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public class SacsAesIvCrypter_Tester
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{
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// --- Data Members ---
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private static readonly Random random = new Random(11437);
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// --- Tests ---
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[Test]
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public void EncryptDecrypt_RoundTripsRandomText()
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{
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for (int i = 0; i < 200; i++)
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{
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String data = RandomString(random.Next(10, 2048), true);
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String key = RandomString(random.Next(10, 128), true);
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String encrypted = SacsAesIvCrypter.Encrypt(data, key);
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Assert.That(SacsAesIvCrypter.Decrypt(encrypted, key), Is.EqualTo(data));
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}
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}
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[Test]
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public void Decrypt_ReadsLegacyCiphertext()
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{
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const String encrypted = "0qlOvuM3L9+yzc6XnuHSv2Jq/1v1pyPq6CaCYnMauW6n+bBc9YOBNPtaNFm+2JGz;zgCog0OpwdN+I8yK5UAU8g==";
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const String key = "Compatibility-Key-2026!";
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String decrypted = SacsAesIvCrypter.Decrypt(encrypted, key);
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Assert.That(decrypted, Is.EqualTo("Legacy compatibility payload £ € 漢字"));
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}
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[Test]
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public void Decrypt_ReturnsUnencryptedTextUnchanged()
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{
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const String value = "A value without an appended IV";
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String decrypted = SacsAesIvCrypter.Decrypt(value, "unused-key");
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Assert.That(decrypted, Is.SameAs(value));
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}
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[Test]
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public void Encrypt_UsesUniqueInitializationVectors()
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{
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const String value = "Repeated value";
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const String key = "Repeated-key";
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String first = SacsAesIvCrypter.Encrypt(value, key);
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String second = SacsAesIvCrypter.Encrypt(value, key);
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Assert.That(first, Is.Not.EqualTo(second));
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Assert.That(SacsAesIvCrypter.Decrypt(first, key), Is.EqualTo(value));
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Assert.That(SacsAesIvCrypter.Decrypt(second, key), Is.EqualTo(value));
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}
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[Test]
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public void Encrypt_ProducesKnownCiphertextForExplicitKeyAndIv()
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{
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Byte[] key = Enumerable.Range(0, 32).Select(value => (Byte)value).ToArray();
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Byte[] iv = Enumerable.Range(16, 16).Select(value => (Byte)value).ToArray();
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Byte[] encrypted = SacsAesIvCrypter.Encrypt("Known vector £ 漢字", key, iv);
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Assert.That(Convert.ToBase64String(encrypted), Is.EqualTo("9yYFmwEr9e00Z3WMjGRWfkgT/XwV8OJ4Encs4x9HiVo="));
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Assert.That(SacsAesIvCrypter.Decrypt(encrypted, key, iv), Is.EqualTo("Known vector £ 漢字"));
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}
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// --- Utilities ---
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/// <summary>Generate random alphanumeric string</summary>
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private static String RandomString(int length, bool includeLowerCase = true, bool includeSymbols = true)
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{
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String chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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if (includeLowerCase) chars += "abcdefghijklmnopqrstuvwxyz";
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if (includeSymbols) chars += "`¬!\"£$%^&*()-=_+{}[];:'@#~<>?/.,\\| ";
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return new string(Enumerable.Repeat(chars, length).Select(s => s[random.Next(s.Length)]).ToArray());
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}
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// --- The End ---
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}
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}
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