Add SSH Key Management

internal/dis/component/ssh2/sshkeys/sshkeys.go

@@ -0,0 +1,51 @@
+package sshkeys
+
+import (
+	"context"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/auth"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/sql"
+	"github.com/gliderlabs/ssh"
+)
+
+type SSHKeys struct {
+	component.Base
+	Dependencies struct {
+		SQL  *sql.SQL
+		Auth *auth.Auth
+	}
+}
+
+var (
+	_ component.Table          = (*SSHKeys)(nil)
+	_ component.UserDeleteHook = (*SSHKeys)(nil)
+)
+
+// Admin returns the set of administrative ssh keys.
+// These are ssh keys associated to distillery admin users.
+func (k *SSHKeys) Admin(ctx context.Context) (keys []ssh.PublicKey, err error) {
+	users, err := k.Dependencies.Auth.Users(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	// iterate over enabled distillery admin users
+	for _, user := range users {
+		if !user.IsEnabled() || !user.IsAdmin() {
+			continue
+		}
+		ukeys, err := k.Keys(ctx, user.User.User)
+		if err != nil {
+			return nil, err
+		}
+		for _, ukey := range ukeys {
+			if pk := ukey.PublicKey(); pk != nil {
+				keys = append(keys, pk)
+			}
+		}
+	}
+
+	// and return the keys!
+	return keys, nil
+}