Sample
cryptography 47.0.0: Disabling OpenSSL legacy provider via CRYPTOGRAPHY_OPENSSL_NO_LEGACY runtime environment variable causes legacy cipher operations to raise UnsupportedAlgorithm
Verified sample for pypi cryptography 47.0.0: Disabling OpenSSL legacy provider via CRYPTOGRAPHY_OPENSSL_NO_LEGACY runtime environment variable causes legacy…
sha256:98090b94729844a3359b8943ee2dcc5ea8569885ca1ce0bbe449f2bf38c2d002
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
- Disabling OpenSSL legacy provider via CRYPTOGRAPHY_OPENSSL_NO_LEGACY runtime environment variable causes legacy cipher operations to raise UnsupportedAlgorithm
- Packages
- Symbols
-
- cryptography.hazmat.primitives.ciphers.algorithms.Blowfish
- cryptography.hazmat.bindings.openssl.binding.Binding
- cryptography.exceptions.UnsupportedAlgorithm
- Environment
- python
- Created
- 2026-08-17T02:11:45Z
Contract
- Setting CRYPTOGRAPHY_OPENSSL_NO_LEGACY=1 before cryptography OpenSSL binding initialization prevents loading the OpenSSL legacy provider, causing Blowfish cipher encryptor creation to raise UnsupportedAlgorithm
- assert _rust.openssl._legacy_provider_loaded is False
- assert res.returncode == 0
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py