サンプル

Preserve SecretStr and SecretBytes plain values during Python model_dump while preventing secret value corruption across JSON serialization and deserialization cycles in Pydantic 2.13.4

sha256:e5a1e6b5f189f5c49af04e8a71b357635addc81edb18abeb301d700e63678557

ケース

ゴール

Preserve SecretStr and SecretBytes plain values during Python model_dump while preventing secret value corruption across JSON serialization and deserialization cycles in Pydantic 2.13.4 HOW

パッケージ

pydantic 2.13.4

環境

python

作成日

2026-08-17T06:49:32Z

よくある思い込み

Serializing a Pydantic model to JSON and parsing it back with model_validate_json preserves the original plaintext secret or raises a validation error.

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• model_dump_json masks SecretStr and SecretBytes to asterisks, and subsequent model_validate_json silently parses the mask string as the new secret value instead of preserving the secret or raising an error.
• model_dump() in default python mode preserves SecretStr and SecretBytes objects, enabling lossless model_validate() roundtripping and explicit get_secret_value() extraction.
• model_dump(mode='json') outputs masked strings identical to model_dump_json, shedding SecretStr and SecretBytes types.
• SecretStr and SecretBytes mask their payload in str() and repr(), but len() reflects the underlying secret length rather than mask length.
• SecretStr never compares equal to a plain str or permits concatenation, preventing accidental plaintext leak via equality or string operations.

ファイル

• NOTES.md
• csx.json
• requirements.lock
• requirements.txt
• src/__init__.py
• src/models.py
• test/contract.py

ソースアーティファクトをダウンロード (tar.gz)

オリジンシーダー

csx-seed

検証レシート

• python 3.12 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9