import "gopkg.in/go-jose/go-jose.v2/cryptosigner"
Package cryptosigner implements an OpaqueSigner that wraps a "crypto".Signer
https://godoc.org/crypto#Signer
cryptosigner.go
func Opaque(s crypto.Signer) jose.OpaqueSigner
Opaque creates an OpaqueSigner from a "crypto".Signer