1 @c Copyright (C) 2004 Free Software Foundation, Inc.
2 @c This is part of the GnuPG manual.
3 @c For copying conditions, see the file gnupg.texi.
6 @chapter Notes pertaining to certain OSes.
8 GnuPG has been developed on GNU/Linux systems and is know to work on
9 almost all Free OSes. All modern POSIX systems should be supproted
10 right now, however there are probably a lot of smaller glitches we need
11 to fix first. The major problem areas are:
15 For logging to sockets and other internal operations the
16 @code{fopencookie} function (@code{funopen} under *BSD) is used. This
17 is a very convient function which makes it possible to create outputs in
18 a structures and easy maintainable way. The drawback however is that
19 most proprietary OSes don't support this function. At g10@tie{}Code we
20 have looked into several ways on how to overcome this limitation but no
21 sufficiently easy and maintainable way has been found. Porting
22 @emph{glibc} to a general POSIX system is of course an option and would
23 make writing portable software much easier; this it has not yet been
24 done and the system administrator wouldneed to cope with the GNU
25 specific admin things in addition to the generic ones of his system.
27 We have now settled to use explicit stdio wrappers with a functionality
28 similar to funopen. Although the code for this has already been written
29 (@emph{libestream}), we have not yet changed GnuPG to use it.
31 This means that on systems not supporting either @code{funopen} or
32 @code{fopencookie}, logging to a socket won't work, prompts are not
33 formatted as pretty as theyshould be and @command{gpgsm}'s
34 @code{LISTKEYS} Assuan command does not work.
37 We are planning to use file descriptor passing for interprocess
38 communication. This will allow us save a lot of resources and improve
39 performance of certain operations a lot. Systems not supporting this
40 won't gain these benefits but we try to keep them working the satndard
41 way as it is done today.
44 We require more or less full POSIX compatibility. This has been
45 arround for 15 years now and thus we don't believe it makes sense to
46 support non POSIX systems anymore. Well, we of course the usual
47 workarounds for near POSIX systems well be applied.
49 There is one exception of this rule: Systems based the Microsoft Windows
50 API (called here @emph{W32}) will be supported to some extend.
56 * W32 Notes:: Microsoft Windows Notes
61 @section Microsoft Windows Notes
63 The port to Microsoft Windows based OSes is pretty new and has some
64 limitations we might remove over time. Note, that we have not yet done
65 any security audit and you should not use any valuable private key. In
66 particular, @strong{using it on a box with more than one user, might
67 lead to a key compromise}.
69 @strong{It is quite possible that the current version does not even
73 Current limitations are:
77 The @code{LISTKEYS} Assuan command of @command{gpgsm} is not supported.
78 Using the command line options @option{--list-keys} or
79 @option{--list-secret-keys} does however work.
82 No support for CRL checks. By default the option
83 @option{--disable-crl-checks} has been turned on and the log will show
84 an appropriate warning message. The reason for this is that the
85 separate CRL checking daemin (@command{dirmngr}) has not been ported to
89 @command{gpgconf} does not create backup files, so in case of trouble
90 your configuration file might get lost.
93 @command{watchgnupg} is not available. Logging to sockets is not
97 The periodical smartcard status checking done by @command{scdaemon} is
101 Detached running of the gpg-agent is not directly supported. It needs
102 to be started in a console and left alone then.