Forward ssh2 ports into docker

internal/dis/component/ssh2/ssh2.go

@@ -0,0 +1,28 @@
+package ssh2
+
+import (
+	"io"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/instances"
+	"github.com/FAU-CDI/wisski-distillery/pkg/sshx"
+	"github.com/gliderlabs/ssh"
+)
+
+type SSH2 struct {
+	component.Base
+	Instances *instances.Instances
+}
+
+// GlobalKeys returns the global authorized keys
+func (s *SSH2) GlobalKeys() ([]ssh.PublicKey, error) {
+	file, err := s.Environment.Open(s.Config.GlobalAuthorizedKeysFile)
+	if err != nil {
+		return nil, err
+	}
+	bytes, err := io.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+	return sshx.ParseAllKeys(bytes), nil
+}