Sample
cryptography 47.0.0: AESGCM.generate_key requires key size in bits rather than bytes, and AESGCM.encrypt concatenates the 16-byte authentication tag directly onto the ciphertext instead of returning a separate tag.
Verified sample for pypi cryptography 47.0.0: AESGCM.generate_key requires key size in bits rather than bytes, and AESGCM.encrypt concatenates the 16-byte…
sha256:0952b9725d31eee219a014c7434b84e88f31cda528f8cf85e31989d9be0d45ce
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
python linux x64 python python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-17 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-18 |
Case
HOW- Goal
- AESGCM.generate_key requires key size in bits rather than bytes, and AESGCM.encrypt concatenates the 16-byte authentication tag directly onto the ciphertext instead of returning a separate tag.
- Packages
- Symbols
-
- cryptography.hazmat.primitives.ciphers.aead.AESGCM
- cryptography.hazmat.primitives.ciphers.aead.AESGCM.generate_key
- cryptography.hazmat.primitives.ciphers.aead.AESGCM.encrypt
- cryptography.hazmat.primitives.ciphers.aead.AESGCM.decrypt
- cryptography.exceptions.InvalidTag
- Environment
- python
- Created
- 2026-08-17T02:11:32Z
Contract
- AESGCM.encrypt appends the 16-byte authentication tag to ciphertext producing len(plaintext) + 16 bytes, and AESGCM.generate_key rejects byte lengths with ValueError
- AESGCM.decrypt accepts combined ciphertext and tag and fails with InvalidTag when passed detached ciphertext or mismatched associated data
- AESGCM accepts None for associated_data during encryption and decrypts successfully with b''
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py