预定义常量
GNUPG_SIG_MODE_NORMAL(int)GNUPG_SIG_MODE_DETACH(int)GNUPG_SIG_MODE_CLEAR(int)GNUPG_VALIDITY_UNKNOWN(int)GNUPG_VALIDITY_UNDEFINED(int)GNUPG_VALIDITY_NEVER(int)GNUPG_VALIDITY_MARGINAL(int)GNUPG_VALIDITY_FULL(int)GNUPG_VALIDITY_ULTIMATE(int)GNUPG_PROTOCOL_OpenPGP(int)GNUPG_PROTOCOL_CMS(int)GNUPG_SIGSUM_VALID(int)GNUPG_SIGSUM_GREEN(int)GNUPG_SIGSUM_RED(int)GNUPG_SIGSUM_KEY_REVOKED(int)GNUPG_SIGSUM_KEY_EXPIRED(int)GNUPG_SIGSUM_KEY_MISSING(int)GNUPG_SIGSUM_SIG_EXPIRED(int)GNUPG_SIGSUM_CRL_MISSING(int)GNUPG_SIGSUM_CRL_TOO_OLD(int)GNUPG_SIGSUM_BAD_POLICY(int)GNUPG_SIGSUM_SYS_ERROR(int)GNUPG_ERROR_WARNING(int)GNUPG_ERROR_EXCEPTION(int)GNUPG_ERROR_SILENT(int)
