Sample
verify hkdf.New in pkg:golang/golang.org/x/crypto@v0.20.0
sha256:0e0b51fc7b3c862244f29591b66de92826646b195362feb9292235b75c30a753
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.New in pkg:golang/golang.org/x/crypto@v0.20.0
- Packages
- Symbols
-
- hkdf.New
- Created
- 2026-08-27T18:42:50Z
Contract
- hkdf.New returns an io.Reader that derives pseudorandom keys using SHA-256
- hkdf.New is deterministic and returns identical bytes for identical secret, salt, and info inputs
- hkdf.New with nil salt is equivalent to using a zero-filled salt matching hash size
- hkdf.New produces different key streams for different info context strings
- hkdf.New produces different key streams for different secret inputs
- hkdf.New returns error when reading beyond 255 times hash size limit
Files
- PROMPT.md
- csx.json
- go.mod
- go.sum
- main.go
- spec.json
- test/contract.go
Origin Seeder
anonymous