CodeSampleX

Sample

Hybrid Public Key Encryption setup seal and open

sha256:4a8c605a20bdafe79c654fdd929c53b7b05c14157eaecce5d8c07b1ea3a4f466

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

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…		 2026-08-23

Case

HOW
Goal
Hybrid Public Key Encryption setup seal and open
Packages
Symbols
  • hpke.Suite
  • hpke.Suite.NewReceiver
  • hpke.Suite.NewSender
Environment
go 1.26.6
Created
2026-08-23T17:39:05Z

Contract

  1. hpke.NewSuite initializes an HPKE cipher suite combining KEM, KDF, and AEAD identifiers.
  2. hpke.Suite.NewSender creates a Sender bound to a recipient public key and optional context info.
  3. hpke.Sender.Setup generates encapsulated key bytes and returns a Sealer for AEAD encryption.
  4. hpke.Suite.NewReceiver creates a Receiver bound to a recipient private key and matching context info.
  5. hpke.Receiver.Setup decapsulates key material using received encapsulated bytes and returns an Opener.
  6. hpke.Sealer.Seal encrypts plaintext with additional authenticated data, and hpke.Opener.Open decrypts the ciphertext back to the original plaintext.
  7. hpke.Opener.Open fails when ciphertext or additional authenticated data is tampered with.

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • hpke_crypto.go
  • spec.json
  • test/contract_test.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous