Sample
getrandom 0.3.4: getrandom 0.3.4 adds the unsupported opt-in backend flag returning Error::UNSUPPORTED on fill and scalar entropy queries without custom extern linkage
Verified sample for cargo getrandom 0.3.4: getrandom 0.3.4 adds the unsupported opt-in backend flag returning Error::UNSUPPORTED on fill and scalar entropy…
sha256:b4fd8baecae4ffb3151604e15787226d2032b9d66529ca279ac8d5b4792cc0ef
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
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- getrandom 0.3.4 adds the unsupported opt-in backend flag returning Error::UNSUPPORTED on fill and scalar entropy queries without custom extern linkage
- Packages
- Symbols
-
- getrandom::fill
- getrandom::fill_uninit
- getrandom::u32
- getrandom::u64
- getrandom::Error::UNSUPPORTED
- Environment
- rust
- Created
- 2026-08-16T09:17:07Z
Contract
- assert getrandom_backend="unsupported" flag routes entropy requests to safe stub returning Error::UNSUPPORTED on fill
- assert getrandom::fill_uninit returns Error::UNSUPPORTED without modifying uninitialized buffer
- assert getrandom::u32 and getrandom::u64 return Error::UNSUPPORTED
- assert Error::UNSUPPORTED has no raw_os_error
Files
- .cargo/config.toml
- .gitignore
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs