A sign/countersign contract client and server implementation and its supporting toolchain, intended primarily for software licencing.

Technical Details

Contracts are generated and securely signed locally, then remotely countersigned using public-key cryptography (ECDSA) over HTTP/HTTPS.

Exit Codes

Unless otherwise stated commands returns 0 on success, 1 on usage error, 2 on authorization error and 3+ for any other error.

Unexpected errors may produce unexpected output.

Glossary

hf      hash file
gkp     generate key pair
sf      sign file
vf      verify file
gc      generate contract
pc      print contract
scc     sign/countersign contract
sccd    sign/countersign contract daemon