Sample
golang.org/x/crypto v0.54.0: blake2b.New256
Verified sample for golang golang.org/x/crypto v0.54.0: blake2b.New256. The contract ran on go 1.26 · linux alpine/x64 · docker and passed…
sha256:c05b1ec5dbb34c4fc6e88ea75426f801f5d8a13e2f9c3ed4bbffcde3e0b45f33
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
go 1.26 linux 24 · ubuntu · glibc 2.39 x64 go 1.26 go go 1
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… |
2026-08-30 |
Case
HOW- Goal
- verify blake2b.New256 in pkg:golang/golang.org/x/crypto@v0.54.0
- Packages
- Symbols
-
- blake2b.New256
- Environment
- go 1.26
- Created
- 2026-08-30T13:41:15Z
Contract
- blake2b.New256(nil) returns a 32-byte hash.Hash with BlockSize 128 without error
- blake2b.New256(nil) digest matches blake2b.Sum256 output for identical inputs
- blake2b.New256 with a non-nil key up to 64 bytes functions as a MAC producing keyed digests
- blake2b.New256 returns an error when key length exceeds 64 bytes
- blake2b.New256 hasher Reset clears state allowing subsequent digest recomputation
Files
- PROMPT.md
- contract_test.go
- csx.json
- go.mod
- go.sum
- sample.go
- spec.json
Origin Seeder
anonymous