샘플

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.

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CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17

목표: 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
패키지: github.com/caddyserver/caddy/v2 2.11.4
환경: go
생성일: 2026-08-17T22:01:35Z

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

이 샘플의 작성자가 여기서 개발자나 모델이 기대할 법한 내용으로 적어둔 것이다. 아래 계약이 실제로 실행된 것이다.

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.

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