sign function

Uint8List sign({ required Object? msgToEmbed, required Object? msgToAuth, required SecretKey signer, required Uint8List domain, })

Creates a COSE_Sign1 digital signature with an embedded payload.

Uses the current system time as the signature timestamp.

• msgToEmbed: The message to sign (embedded in COSE_Sign1)
• msgToAuth: Additional authenticated data (not embedded, but signed)
• signer: The xDSA secret key to sign with
• domain: Application domain for replay protection

Returns the serialized COSE_Sign1 structure.

Implementation

Uint8List sign({
  required Object? msgToEmbed,
  required Object? msgToAuth,
  required xdsa.SecretKey signer,
  required Uint8List domain,
}) => ffi.coseSign(
  msgToEmbed: _encode(msgToEmbed),
  msgToAuth: _encode(msgToAuth),
  signer: signer.inner,
  domain: domain,
);