Sample
crypto 3.0.6: Handle invalid byte input values and chunked conversion closed-state errors in package:crypto
Verified sample for pub crypto 3.0.6: Handle invalid byte input values and chunked conversion closed-state errors in package:crypto. The contract ran on dart…
sha256:0af50503366382d34692ce3bf046e81d221352626b0633d4c1c13db0df487bf5
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
dart linux x64 dart dart pub
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| dart 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-17 |
| dart 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-18 |
Case
HOW- Goal
- Handle invalid byte input values and chunked conversion closed-state errors in package:crypto
- Packages
- Symbols
-
- sha256.convert
- Digest
- Hash.startChunkedConversion
- Hmac
- Environment
- dart
- Created
- 2026-08-17T02:05:34Z
Contract
- sha256.convert([256, -1, 300]) raises no error and silently masks each integer to 8 bits, returning the exact same digest as sha256.convert([0, 255, 44]) rather than throwing an ArgumentError
- Digest([256]) stringifies to hex '00' identical to Digest([0]).toString() but evaluates to false under operator==
- Digest operator== returns false rather than throwing when compared with a hex String or byte List
- calling add() on a closed Hash chunked conversion sink throws StateError rather than ClosedException or silently accepting input
- calling close() repeatedly on a Hash chunked conversion sink is idempotent and raises no error
- calling add() on a closed HMAC chunked conversion sink throws StateError
Files
- NOTES.md
- csx.json
- pubspec.lock
- pubspec.yaml
- test/contract.dart