initial stub commit

ssh_server.go

@@ -0,0 +1,17 @@
+package ussher
+
+import "golang.org/x/crypto/ssh"
+
+func RunSSHServer(config *Config) error {
+	sshConfig := &ssh.ServerConfig{
+		PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
+			return config.Keystore.CheckPublicKey(conn.User(), key)
+		},
+	}
+
+	private, err := config.GetPrivateKey()
+	if err != nil {
+		return err
+	}
+	sshConfig.AddHostKey(private)
+}