CodeSampleX

Sample

verify pkg:golang/golang.org/x/crypto@v0.25.0

sha256:5754091b85eade9141976ab1d74d0201821ed8936f725559c7f6dc92630b1c40

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…		 2026-08-26

Case

HOW
Goal
verify pkg:golang/golang.org/x/crypto@v0.25.0
Packages
Symbols
  • bcrypt.CompareHashAndPassword
  • bcrypt.Cost
  • bcrypt.GenerateFromPassword
Created
2026-08-26T04:27:32Z

Contract

  1. bcrypt.GenerateFromPassword generates a valid bcrypt hash with MinCost
  2. bcrypt.GenerateFromPassword with cost < MinCost automatically defaults to DefaultCost
  3. bcrypt.CompareHashAndPassword returns nil when password matches hash
  4. bcrypt.CompareHashAndPassword returns ErrMismatchedHashAndPassword when password does not match
  5. bcrypt.Cost returns the integer cost value extracted from a valid bcrypt hash
  6. bcrypt.GenerateFromPassword rejects password exceeding 72 bytes with ErrPasswordTooLong
  7. bcrypt.GenerateFromPassword rejects cost exceeding MaxCost with InvalidCostError

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • main.go
  • spec.json
  • test/contract.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous