int convert_string_to_keyid(gnutls_openpgp_keyid_t out, const char* str);
int convert_string_to_printable_keyid(printable_keyid out, const char* str);
int convert_string_to_keyid(gnutls_openpgp_keyid_t out, const char* str);
int convert_string_to_printable_keyid(printable_keyid out, const char* str);