Sample
crypto 3.0.6: Enforce package:crypto internal invariant assertions and runtime behavior under Dart's --enable-asserts flag
Verified sample for pub crypto 3.0.6: Enforce package:crypto internal invariant assertions and runtime behavior under Dart's --enable-asserts flag. The…
sha256:09b939ee857b27e516b256d5df83641ab0732701a6522d5cdfaf787afdce7c3e
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
- Enforce package:crypto internal invariant assertions and runtime behavior under Dart's --enable-asserts flag
- Packages
- Symbols
-
- HashSink
- Hmac
- Digest
- sha256
- Environment
- dart
- Created
- 2026-08-17T03:18:36Z
Contract
- Instantiating HashSink with signatureBytes less than 8 bypasses checks and produces a digest in default mode, but throws AssertionError only when Dart is run with the --enable-asserts flag.
- assert that digest instances compare by value with == while comparing their bytes property checks reference identity
- assert that Hmac key list elements outside 0..255 are truncated to 8-bit integers without throwing an ArgumentError
- assert that chunked conversion sinks emit a Digest to the destination sink only after close() is called
Files
- .gitignore
- NOTES.md
- csx.json
- lib/pub_crypto_config.dart
- pubspec.lock
- pubspec.yaml
- test/contract.dart
- test/pub_crypto_config_test.dart