ssh.PublicKey cast to rsa.PublicKey

key.go

package rsa

import (
	"crypto/rsa"
	"golang.org/x/crypto/ssh"
)

func FromSshPublicKey(key ssh.PublicKey) (*rsa.PublicKey, bool) {
	if cryptoKey, ok := key.(ssh.CryptoPublicKey); ok {
		rsaKey, ok := cryptoKey.CryptoPublicKey().(*rsa.PublicKey)
		return rsaKey, ok
	}
	return nil, false
}