a786599416
Replace inaccurate GenerateKey docstring (it claimed to port Cryptographer.generateKeyString directly but the input shape differs: server uses one hex digit per call, client uses Random.Next(0,65535) per call). New doc is honest about the difference and explains why it's safe. Add EncryptForNode_FixedVector_ProducesStableOutput: a pinned AES-CBC vector that catches encoding/IV/padding regressions that would slip past the roundtrip test. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
59 lines
2.0 KiB
C#
59 lines
2.0 KiB
C#
using NUnit.Framework;
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using SVSim.BattleNode.Wire;
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namespace SVSim.UnitTests.BattleNode.Wire;
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[TestFixture]
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public class NodeCryptoTests
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{
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[Test]
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public void EncryptThenDecrypt_RoundTripsArbitraryString()
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{
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const string plaintext = "{\"uri\":\"InitNetwork\",\"viewerId\":906243102,\"try\":0,\"cat\":99}";
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const string key = "Y2FmZWJhYmU3ZmY3ZmY3ZmY3ZmY3ZmY3"; // 32 chars
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var encrypted = NodeCrypto.EncryptForNode(plaintext, key);
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var decrypted = NodeCrypto.DecryptForNode(encrypted);
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Assert.That(decrypted, Is.EqualTo(plaintext));
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}
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[Test]
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public void GenerateKey_WithDeterministicSource_ProducesStable32CharOutput()
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{
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var seq = 0;
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string key = NodeCrypto.GenerateKey(() => seq++ % 16);
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Assert.That(key.Length, Is.EqualTo(32));
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// Two calls with the same source produce the same output.
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seq = 0;
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Assert.That(NodeCrypto.GenerateKey(() => seq++ % 16), Is.EqualTo(key));
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}
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[Test]
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public void EncryptForNode_NonStandardKeyLength_Throws()
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{
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Assert.Throws<ArgumentException>(() => NodeCrypto.EncryptForNode("x", "tooshort"));
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}
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[Test]
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public void DecryptForNode_TooShortInput_Throws()
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{
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Assert.Throws<ArgumentException>(() => NodeCrypto.DecryptForNode("tooshort"));
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}
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[Test]
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public void EncryptForNode_FixedVector_ProducesStableOutput()
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{
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// Pinned wire-format regression: any change to encoding/padding/IV derivation
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// that drifts in both directions would still pass the roundtrip test but break
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// this hardcoded vector — and break interop with the real client.
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const string plaintext = "hello, node!";
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const string key = "01234567890123456789012345678901";
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const string expected = "012345678901234567890123456789015mEezM5MgR7UUEkmx5OzPQ==";
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Assert.That(NodeCrypto.EncryptForNode(plaintext, key), Is.EqualTo(expected));
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Assert.That(NodeCrypto.DecryptForNode(expected), Is.EqualTo(plaintext));
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}
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}
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