Key *key_load_public_type(int, const char *, char **);
Key *key_load_private(const char *, const char *, char **);
Key *key_load_private_type(int, const char *, const char *, char **);
Key *key_load_public_type(int, const char *, char **);
Key *key_load_private(const char *, const char *, char **);
Key *key_load_private_type(int, const char *, const char *, char **);