Deterministic file type & MIME detection for .NET with fail-closed archive validation, secure extraction, and hashing evidence (SHA-256/HMAC).
csharp dotnet nuget magic-numbers mime mime-types sha256 ooxml file-signature magic-bytes hmac-sha256 file-validation file-type-detection path-traversal-protection fail-closed deterministic-hashing archive-validation secure-archive-extraction zip-slip-protection zip-bomb-protection
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Updated
Feb 14, 2026 - C#