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feat: add S2 compression and AEAD encryption for FileStore (Go parity)

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Replace Deflate+XOR with IronSnappy S2 block compression and ChaCha20-Poly1305 / AES-256-GCM
AEAD encryption, matching golang/nats-server/server/filestore.go. Introduces FSV2 envelope
format alongside existing FSV1 for backward compatibility. Adds 55 new tests across
S2CodecTests, AeadEncryptorTests, and FileStoreV2Tests covering all 6 cipher×compression
permutations, tamper detection, and legacy format round-trips.
This commit is contained in:
Joseph Doherty
2026-02-24 06:29:34 -05:00
parent 2c9683e7aa
commit 9cc9888bb4
6 changed files with 944 additions and 0 deletions
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src/NATS.Server/NATS.Server.csproj
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@@ -4,6 +4,7 @@
</ItemGroup>
<ItemGroup>
<FrameworkReference Include="Microsoft.AspNetCore.App" />
<PackageReference Include="IronSnappy" />
<PackageReference Include="NATS.NKeys" />
<PackageReference Include="BCrypt.Net-Next" />
</ItemGroup>