The parts of an sshsig signature verifySshSignature needs.
sshsig
verifySshSignature
The key embedded in the signature.
The namespace the signature was made in.
The hash the message was digested with.
The algorithm name inside the signature blob (rsa-sha2-256, ssh-ed25519, …).
rsa-sha2-256
ssh-ed25519
The raw algorithm-specific signature bytes.
The parts of an
sshsigsignatureverifySshSignatureneeds.