int uudecode(const char *src, unsigned char *target, size_t targsize);
int check_ssh_key_header(const unsigned char *blob, int blen);
int check_key_file(const char *file, bool private_key);
int uudecode(const char *src, unsigned char *target, size_t targsize);
int check_ssh_key_header(const unsigned char *blob, int blen);
int check_key_file(const char *file, bool private_key);