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ssh: Add support for Putty.

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* agent/gpg-agent.c [W32]: Include Several Windows header.
(opts): Change help text for enable-ssh-support.
(opts, main): Add option --enable-putty-support
(putty_support, PUTTY_IPC_MAGIC, PUTTY_IPC_MAXLEN): New for W32.
(agent_init_default_ctrl): Add and asssert call.
(putty_message_proc, putty_message_thread): New.
(handle_connections) [W32]: Start putty message thread.
* common/sysutils.c (w32_get_user_sid): New for W32 only
* tools/gpgconf-comp.c (gc_options_gpg_agent): Add
--enable-ssh-support and --enable-putty-support.  Make the
configuration group visible at basic level.
* agent/command-ssh.c (serve_mmapped_ssh_request): New for W32 only.
--

This patch enables support for Putty.  It has been tested with Putty
0.62 using an Unix created ssh key copied to the private-keys-v1.d
directory on Windows and with a manually crafted sshcontrol file.  It
also works with a smartcard key.

May thanks to gniibe who implemented a proxy in Python to test the
putty/gpg-agent communication.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2013-07-03 13:29:47 +02:00
parent ed056d67c7
commit 9f32499f99
7 changed files with 472 additions and 5 deletions
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57
common/sysutils.c
View file

@ -1,6 +1,7 @@
/* sysutils.c - system helpers
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004,
* 2007, 2008 Free Software Foundation, Inc.
* Copyright (C) 2013 Werner Koch
*
* This file is part of GnuPG.
*
@ -495,3 +496,59 @@ gnupg_allow_set_foregound_window (pid_t pid)
(unsigned long)pid, w32_strerror (-1));
#endif
}
#ifdef HAVE_W32_SYSTEM
/* Return the user's security identifier from the current process. */
PSID
w32_get_user_sid (void)
{
int okay = 0;
HANDLE proc = NULL;
HANDLE token = NULL;
TOKEN_USER *user = NULL;
PSID sid = NULL;
DWORD tokenlen, sidlen;
proc = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, GetCurrentProcessId());
if (!proc)
goto leave;
if (!OpenProcessToken (proc, TOKEN_QUERY, &token))
goto leave;
if (!GetTokenInformation (token, TokenUser, NULL, 0, &tokenlen)
&& GetLastError() != ERROR_INSUFFICIENT_BUFFER)
goto leave;
user = xtrymalloc (tokenlen);
if (!user)
goto leave;
if (!GetTokenInformation (token, TokenUser, user, tokenlen, &tokenlen))
goto leave;
if (!IsValidSid (user->User.Sid))
goto leave;
sidlen = GetLengthSid (user->User.Sid);
sid = xtrymalloc (sidlen);
if (!sid)
goto leave;
if (!CopySid (sidlen, sid, user->User.Sid))
goto leave;
okay = 1;
leave:
xfree (user);
if (token)
CloseHandle (token);
if (proc)
CloseHandle (proc);
if (!okay)
{
xfree (sid);
sid = NULL;
}
return sid;
}
#endif /*HAVE_W32_SYSTEM*/

3
common/sysutils.h
View file

@ -51,8 +51,9 @@ void gnupg_allow_set_foregound_window (pid_t pid);
#ifdef HAVE_W32_SYSTEM
void *w32_get_user_sid (void);
#include "../jnlib/w32help.h"
# include "../jnlib/w32help.h"
#endif /*HAVE_W32_SYSTEM*/