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patrickandClaude Sonnet 5 0d524fc714
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DOC-01: MIME-Sniff gegen tatsaechlichen Inhalt vor Verschluesselung/Speicherung
Fable-5.1-Vergleichsreview: die Positivlisten-Pruefung lief bisher nur
gegen die vom Client bei StartUpload angekuendigte Typangabe
(validate.go ValidateMimeType); ein als "application/pdf" deklariertes,
tatsaechlich beliebiges Archiv/Binary wurde erst beim spaeteren
Ausliefern per Magic-Bytes erkannt (documentapi/handler.go), nicht vor
der Aufnahme.

Fix: Complete() liest die ersten 512 Bytes aus dem Staging-Reader, prueft
sie per http.DetectContentType gegen dieselbe Positivliste, BEVOR
Verschluesselung/Storage/DB-Eintrag passieren. Der Praefix wird fuer
Pruefsumme/Verschluesselung wieder vorangestellt (kein Byteverlust).

Echter Testlauf auf Host 204 gegen migrierte Testdatenbank:
go test ./internal/upload/... -v -> 12/12 PASS, davon neu:
TestCompleteUpload_ContentMismatchingDeclaredMimeTypeIsRejected (ZIP-Inhalt
mit deklariertem application/pdf wird jetzt abgelehnt). Ausserdem
go build ./... fuer das gesamte dms-Modul lief fehlerfrei durch.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-10-19 03:26:00 +02:00
..
2026-08-29 22:23:36 +02:00