Sample
crypto 3.0.7: Hash and HMAC in Dart with package:crypto, and compare the result correctly
Verified sample for pub crypto 3.0.7: Hash and HMAC in Dart with package:crypto, and compare the result correctly. The contract ran on dart 3 · linux…
sha256:952bc1f38576d888d49cb6f0448660430b83ce93bb4791d17a4c8e36dc3ca9a5
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 3 linux x64 dart 3 dart pub
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| dart 3 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-14 |
| dart 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-17 |
Case
HOW- Goal
- Hash and HMAC in Dart with package:crypto, and compare the result correctly
- Packages
- Symbols
-
- sha256.convert
- Hmac
- Digest.toString
- Environment
- dart 3
- Created
- 2026-08-14T05:46:27Z
Contract
- hash a string and compare it against the published NIST vector
- assert HMAC-SHA256 reproduces RFC 4231 test case 1
- assert a digest is 32 bytes and stringifies to hex for comparison
- assert the input encoding decides the digest
Files
- csx.json
- lib/digest.dart
- pubspec.lock
- pubspec.yaml
- test/contract_test.dart