-int sshcom_encrypted(char *filename, char **comment);
-struct ssh2_userkey *sshcom_read(char *filename, char *passphrase);
-int sshcom_write(char *filename, struct ssh2_userkey *key, char *passphrase);
+int sshcom_encrypted(const Filename *filename, char **comment);
+struct ssh2_userkey *sshcom_read(const Filename *filename, char *passphrase);
+int sshcom_write(const Filename *filename, struct ssh2_userkey *key,
+ char *passphrase);