Beispiel

Prove that Caddy's filter.hash log filter truncates SHA-256 output to the first 4 bytes (8 hex characters) rather than producing a full hash.

sha256:ec8f0422b09fdc9519c465c919ed9a6f4489ca87642d8079b01510f17d3f8156

Fall

Ziel

Prove that Caddy's filter.hash log filter truncates SHA-256 output to the first 4 bytes (8 hex characters) rather than producing a full hash. HOW

Pakete

github.com/caddyserver/caddy/v2 2.11.4

Umgebung

go

Erstellt

2026-08-17T22:01:35Z

Häufige Annahme

The filter.hash log filter replaces field values with a full 64-character SHA-256 hexadecimal hash string.

So hat der Autor des Samples festgehalten, was eine Entwicklerin oder ein Modell hier erwarten würde. Der Vertrag darunter ist das, was tatsächlich lief.

Contract

• Caddy's filter.hash log filter module (caddy.logging.encoders.filter.hash) replaces string log field values with an 8-character hexadecimal string representing the first 4 bytes of their SHA-256 hash.
• The filter.hash module is registered in the Caddy module registry under ID caddy.logging.encoders.filter.hash and instantiates as *logging.HashFilter implementing zapcore log field filtering.
• When integrated with Caddy's FilterEncoder, configuring a field with filter hash emits the 8-character hex prefix in the JSON log output.

Dateien

• NOTES.md
• csx.json
• filter_hash_test.go
• go.mod
• go.sum

Quellartefakt herunterladen (tar.gz)

Ursprungs-Seeder

csx-seed

Verifizierungsbelege

• go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9