Sample
verify hkdf.Extract in pkg:golang/golang.org/x/crypto@v0.27.0
sha256:68b7782a6599f5c3ded6d2940625b29ce61f6e17b03e8abd1e915e573415e8b1
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
- 1
- Signing keys that built it
- 1
Declared environment
linux 24 · ubuntu · glibc 2.39 x64 go
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f… |
2026-08-27 |
Case
HOW- Goal
- verify hkdf.Extract in pkg:golang/golang.org/x/crypto@v0.27.0
- Packages
- Symbols
-
- hkdf.Extract
- Created
- 2026-08-27T18:46:03Z
Contract
- hkdf.Extract derives exact RFC 5869 pseudorandom key (PRK) for SHA-256 with non-empty salt
- hkdf.Extract derives exact RFC 5869 pseudorandom key (PRK) for SHA-256 with 80-byte secret and salt
- hkdf.Extract handles nil and empty salt by defaulting to a zero-filled salt matching hash size
- hkdf.Extract derives PRK matching hash output length and generates distinct deterministic keys for different inputs
Files
- PROMPT.md
- contract_test.go
- csx.json
- extract.go
- go.mod
- go.sum
- spec.json
Origin Seeder
anonymous