Page Menu
Home
GnuPG
Search
Configure Global Search
Log In
Files
F18824863
assuan-socket.c
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Size
12 KB
Subscribers
None
assuan-socket.c
View Options
/* assuan-socket.c
Copyright (C) 2004, 2005, 2009 Free Software Foundation, Inc.
This file is part of Assuan.
Assuan is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
Assuan is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include
<config.h>
#endif
#include
<stdio.h>
#include
<stdlib.h>
#ifdef HAVE_W32_SYSTEM
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <wincrypt.h>
#ifndef HAVE_W32CE_SYSTEM
# include <io.h>
#endif
#else
# include <sys/types.h>
# include <sys/socket.h>
#endif
#include
<errno.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include
<fcntl.h>
#endif
#include
<assert.h>
#include
"assuan-defs.h"
#include
"debug.h"
/* Hacks for Slowaris. */
#ifndef PF_LOCAL
# ifdef PF_UNIX
# define PF_LOCAL PF_UNIX
# else
# define PF_LOCAL AF_UNIX
# endif
#endif
#ifndef AF_LOCAL
# define AF_LOCAL AF_UNIX
#endif
#ifdef HAVE_W32_SYSTEM
#ifndef S_IRUSR
# define S_IRUSR 0
# define S_IWUSR 0
#endif
#ifndef S_IRGRP
# define S_IRGRP 0
# define S_IWGRP 0
#endif
#endif
#ifdef HAVE_W32_SYSTEM
#ifdef HAVE_W32CE_SYSTEM
static
wchar_t
*
utf8_to_wchar
(
const
char
*
string
)
{
int
n
;
size_t
nbytes
;
wchar_t
*
result
;
if
(
!
string
)
return
NULL
;
n
=
MultiByteToWideChar
(
CP_UTF8
,
0
,
string
,
-1
,
NULL
,
0
);
if
(
n
<
0
)
return
NULL
;
nbytes
=
(
size_t
)(
n
+
1
)
*
sizeof
(
*
result
);
if
(
nbytes
/
sizeof
(
*
result
)
!=
(
n
+
1
))
{
SetLastError
(
ERROR_INVALID_PARAMETER
);
return
NULL
;
}
result
=
malloc
(
nbytes
);
if
(
!
result
)
return
NULL
;
n
=
MultiByteToWideChar
(
CP_UTF8
,
0
,
string
,
-1
,
result
,
n
);
if
(
n
<
0
)
{
n
=
GetLastError
();
free
(
result
);
result
=
NULL
;
SetLastError
(
n
);
}
return
result
;
}
static
HANDLE
MyCreateFile
(
LPCSTR
lpFileName
,
DWORD
dwDesiredAccess
,
DWORD
dwSharedMode
,
LPSECURITY_ATTRIBUTES
lpSecurityAttributes
,
DWORD
dwCreationDisposition
,
DWORD
dwFlagsAndAttributes
,
HANDLE
hTemplateFile
)
{
wchar_t
*
filename
;
HANDLE
result
;
int
err
;
filename
=
utf8_to_wchar
(
lpFileName
);
if
(
!
filename
)
return
INVALID_HANDLE_VALUE
;
result
=
CreateFileW
(
filename
,
dwDesiredAccess
,
dwSharedMode
,
lpSecurityAttributes
,
dwCreationDisposition
,
dwFlagsAndAttributes
,
hTemplateFile
);
err
=
GetLastError
();
free
(
filename
);
SetLastError
(
err
);
return
result
;
}
static
int
MyDeleteFile
(
LPCSTR
lpFileName
)
{
wchar_t
*
filename
;
int
result
,
err
;
filename
=
utf8_to_wchar
(
lpFileName
);
if
(
!
filename
)
return
0
;
result
=
DeleteFileW
(
filename
);
err
=
GetLastError
();
free
(
filename
);
SetLastError
(
err
);
return
result
;
}
#else
/*!HAVE_W32CE_SYSTEM*/
#define MyCreateFile CreateFileA
#define MyDeleteFile DeleteFileA
#endif
/*!HAVE_W32CE_SYSTEM*/
int
_assuan_sock_wsa2errno
(
int
err
)
{
switch
(
err
)
{
case
WSAENOTSOCK
:
return
EINVAL
;
case
WSAEWOULDBLOCK
:
return
EAGAIN
;
case
ERROR_BROKEN_PIPE
:
return
EPIPE
;
case
WSANOTINITIALISED
:
return
ENOSYS
;
default
:
return
EIO
;
}
}
/* W32: Fill BUFFER with LENGTH bytes of random. Returns -1 on
failure, 0 on success. Sets errno on failure. */
static
int
get_nonce
(
char
*
buffer
,
size_t
nbytes
)
{
HCRYPTPROV
prov
;
int
ret
=
-1
;
if
(
!
CryptAcquireContext
(
&
prov
,
NULL
,
NULL
,
PROV_RSA_FULL
,
(
CRYPT_VERIFYCONTEXT
|
CRYPT_SILENT
))
)
gpg_err_set_errno
(
ENODEV
);
else
{
if
(
!
CryptGenRandom
(
prov
,
nbytes
,
(
unsigned
char
*
)
buffer
))
gpg_err_set_errno
(
ENODEV
);
else
ret
=
0
;
CryptReleaseContext
(
prov
,
0
);
}
return
ret
;
}
/* W32: The buffer for NONCE needs to be at least 16 bytes. Returns 0 on
success and sets errno on failure. */
static
int
read_port_and_nonce
(
const
char
*
fname
,
unsigned
short
*
port
,
char
*
nonce
)
{
FILE
*
fp
;
char
buffer
[
50
],
*
p
;
size_t
nread
;
int
aval
;
fp
=
fopen
(
fname
,
"rb"
);
if
(
!
fp
)
return
-1
;
nread
=
fread
(
buffer
,
1
,
sizeof
buffer
-
1
,
fp
);
fclose
(
fp
);
if
(
!
nread
)
{
gpg_err_set_errno
(
ENOENT
);
return
-1
;
}
buffer
[
nread
]
=
0
;
aval
=
atoi
(
buffer
);
if
(
aval
<
1
||
aval
>
65535
)
{
gpg_err_set_errno
(
EINVAL
);
return
-1
;
}
*
port
=
(
unsigned
int
)
aval
;
for
(
p
=
buffer
;
nread
&&
*
p
!=
'\n'
;
p
++
,
nread
--
)
;
if
(
*
p
!=
'\n'
||
nread
!=
17
)
{
gpg_err_set_errno
(
EINVAL
);
return
-1
;
}
p
++
;
nread
--
;
memcpy
(
nonce
,
p
,
16
);
return
0
;
}
#endif
/*HAVE_W32_SYSTEM*/
/* Return a new socket. Note that under W32 we consider a socket the
same as an System Handle; all functions using such a handle know
about this dual use and act accordingly. */
assuan_fd_t
_assuan_sock_new
(
assuan_context_t
ctx
,
int
domain
,
int
type
,
int
proto
)
{
#ifdef HAVE_W32_SYSTEM
assuan_fd_t
res
;
if
(
domain
==
AF_UNIX
||
domain
==
AF_LOCAL
)
domain
=
AF_INET
;
res
=
SOCKET2HANDLE
(
_assuan_socket
(
ctx
,
domain
,
type
,
proto
));
return
res
;
#else
return
_assuan_socket
(
ctx
,
domain
,
type
,
proto
);
#endif
}
int
_assuan_sock_connect
(
assuan_context_t
ctx
,
assuan_fd_t
sockfd
,
struct
sockaddr
*
addr
,
int
addrlen
)
{
#ifdef HAVE_W32_SYSTEM
if
(
addr
->
sa_family
==
AF_LOCAL
||
addr
->
sa_family
==
AF_UNIX
)
{
struct
sockaddr_in
myaddr
;
struct
sockaddr_un
*
unaddr
;
unsigned
short
port
;
char
nonce
[
16
];
int
ret
;
unaddr
=
(
struct
sockaddr_un
*
)
addr
;
if
(
read_port_and_nonce
(
unaddr
->
sun_path
,
&
port
,
nonce
))
return
-1
;
myaddr
.
sin_family
=
AF_INET
;
myaddr
.
sin_port
=
htons
(
port
);
myaddr
.
sin_addr
.
s_addr
=
htonl
(
INADDR_LOOPBACK
);
/* Set return values. */
unaddr
->
sun_family
=
myaddr
.
sin_family
;
unaddr
->
sun_port
=
myaddr
.
sin_port
;
unaddr
->
sun_addr
.
s_addr
=
myaddr
.
sin_addr
.
s_addr
;
ret
=
_assuan_connect
(
ctx
,
HANDLE2SOCKET
(
sockfd
),
(
struct
sockaddr
*
)
&
myaddr
,
sizeof
myaddr
);
if
(
!
ret
)
{
/* Send the nonce. */
ret
=
_assuan_write
(
ctx
,
sockfd
,
nonce
,
16
);
if
(
ret
>=
0
&&
ret
!=
16
)
{
gpg_err_set_errno
(
EIO
);
ret
=
-1
;
}
}
return
ret
;
}
else
{
int
res
;
res
=
_assuan_connect
(
ctx
,
HANDLE2SOCKET
(
sockfd
),
addr
,
addrlen
);
return
res
;
}
#else
return
_assuan_connect
(
ctx
,
sockfd
,
addr
,
addrlen
);
#endif
}
int
_assuan_sock_bind
(
assuan_context_t
ctx
,
assuan_fd_t
sockfd
,
struct
sockaddr
*
addr
,
int
addrlen
)
{
#ifdef HAVE_W32_SYSTEM
if
(
addr
->
sa_family
==
AF_LOCAL
||
addr
->
sa_family
==
AF_UNIX
)
{
struct
sockaddr_in
myaddr
;
struct
sockaddr_un
*
unaddr
;
HANDLE
filehd
;
int
len
=
sizeof
myaddr
;
int
rc
;
char
nonce
[
16
];
char
tmpbuf
[
33
+
16
];
DWORD
nwritten
;
if
(
get_nonce
(
nonce
,
16
))
return
-1
;
unaddr
=
(
struct
sockaddr_un
*
)
addr
;
myaddr
.
sin_port
=
0
;
myaddr
.
sin_family
=
AF_INET
;
myaddr
.
sin_addr
.
s_addr
=
htonl
(
INADDR_LOOPBACK
);
filehd
=
MyCreateFile
(
unaddr
->
sun_path
,
GENERIC_WRITE
,
FILE_SHARE_READ
,
NULL
,
CREATE_NEW
,
FILE_ATTRIBUTE_NORMAL
,
NULL
);
if
(
filehd
==
INVALID_HANDLE_VALUE
)
{
if
(
GetLastError
()
==
ERROR_FILE_EXISTS
)
gpg_err_set_errno
(
WSAEADDRINUSE
);
return
-1
;
}
rc
=
bind
(
HANDLE2SOCKET
(
sockfd
),
(
struct
sockaddr
*
)
&
myaddr
,
len
);
if
(
!
rc
)
rc
=
getsockname
(
HANDLE2SOCKET
(
sockfd
),
(
struct
sockaddr
*
)
&
myaddr
,
&
len
);
if
(
rc
)
{
int
save_e
=
errno
;
CloseHandle
(
filehd
);
MyDeleteFile
(
unaddr
->
sun_path
);
gpg_err_set_errno
(
save_e
);
return
rc
;
}
snprintf
(
tmpbuf
,
sizeof
tmpbuf
,
"%d
\n
"
,
ntohs
(
myaddr
.
sin_port
));
len
=
strlen
(
tmpbuf
);
memcpy
(
tmpbuf
+
len
,
nonce
,
16
);
len
+=
16
;
if
(
!
WriteFile
(
filehd
,
tmpbuf
,
len
,
&
nwritten
,
NULL
))
{
CloseHandle
(
filehd
);
MyDeleteFile
(
unaddr
->
sun_path
);
gpg_err_set_errno
(
EIO
);
return
-1
;
}
CloseHandle
(
filehd
);
return
0
;
}
else
{
int
res
=
bind
(
HANDLE2SOCKET
(
sockfd
),
addr
,
addrlen
);
if
(
res
<
0
)
gpg_err_set_errno
(
_assuan_sock_wsa2errno
(
WSAGetLastError
()));
return
res
;
}
#else
return
bind
(
sockfd
,
addr
,
addrlen
);
#endif
}
int
_assuan_sock_get_nonce
(
assuan_context_t
ctx
,
struct
sockaddr
*
addr
,
int
addrlen
,
assuan_sock_nonce_t
*
nonce
)
{
#ifdef HAVE_W32_SYSTEM
if
(
addr
->
sa_family
==
AF_LOCAL
||
addr
->
sa_family
==
AF_UNIX
)
{
struct
sockaddr_un
*
unaddr
;
unsigned
short
port
;
if
(
sizeof
nonce
->
nonce
!=
16
)
{
gpg_err_set_errno
(
EINVAL
);
return
-1
;
}
nonce
->
length
=
16
;
unaddr
=
(
struct
sockaddr_un
*
)
addr
;
if
(
read_port_and_nonce
(
unaddr
->
sun_path
,
&
port
,
nonce
->
nonce
))
return
-1
;
}
else
{
nonce
->
length
=
42
;
/* Arbitrary value to detect unitialized nonce. */
nonce
->
nonce
[
0
]
=
42
;
}
#else
(
void
)
addr
;
(
void
)
addrlen
;
nonce
->
length
=
0
;
#endif
return
0
;
}
int
_assuan_sock_check_nonce
(
assuan_context_t
ctx
,
assuan_fd_t
fd
,
assuan_sock_nonce_t
*
nonce
)
{
#ifdef HAVE_W32_SYSTEM
char
buffer
[
16
],
*
p
;
size_t
nleft
;
int
n
;
if
(
sizeof
nonce
->
nonce
!=
16
)
{
gpg_err_set_errno
(
EINVAL
);
return
-1
;
}
if
(
nonce
->
length
==
42
&&
nonce
->
nonce
[
0
]
==
42
)
return
0
;
/* Not a Unix domain socket. */
if
(
nonce
->
length
!=
16
)
{
gpg_err_set_errno
(
EINVAL
);
return
-1
;
}
p
=
buffer
;
nleft
=
16
;
while
(
nleft
)
{
n
=
_assuan_read
(
ctx
,
SOCKET2HANDLE
(
fd
),
p
,
nleft
);
if
(
n
<
0
&&
errno
==
EINTR
)
;
else
if
(
n
<
0
&&
errno
==
EAGAIN
)
Sleep
(
100
);
else
if
(
n
<
0
)
return
-1
;
else
if
(
!
n
)
{
gpg_err_set_errno
(
EIO
);
return
-1
;
}
else
{
p
+=
n
;
nleft
-=
n
;
}
}
if
(
memcmp
(
buffer
,
nonce
->
nonce
,
16
))
{
gpg_err_set_errno
(
EACCES
);
return
-1
;
}
#else
(
void
)
fd
;
(
void
)
nonce
;
#endif
return
0
;
}
/* Public API. */
/* In the future, we can allow access to sock_ctx, if that context's
hook functions need to be overridden. There can only be one global
assuan_sock_* user (one library or one application) with this
convenience interface, if non-standard hook functions are
needed. */
static
assuan_context_t
sock_ctx
;
gpg_error_t
assuan_sock_init
()
{
gpg_error_t
err
;
#ifdef HAVE_W32_SYSTEM
WSADATA
wsadat
;
#endif
if
(
sock_ctx
!=
NULL
)
return
0
;
err
=
assuan_new
(
&
sock_ctx
);
#ifdef HAVE_W32_SYSTEM
if
(
!
err
)
WSAStartup
(
0x202
,
&
wsadat
);
#endif
return
err
;
}
void
assuan_sock_deinit
()
{
if
(
sock_ctx
==
NULL
)
return
;
#ifdef HAVE_W32_SYSTEM
WSACleanup
();
#endif
assuan_release
(
sock_ctx
);
sock_ctx
=
NULL
;
}
int
assuan_sock_close
(
assuan_fd_t
fd
)
{
return
_assuan_close
(
sock_ctx
,
fd
);
}
assuan_fd_t
assuan_sock_new
(
int
domain
,
int
type
,
int
proto
)
{
return
_assuan_sock_new
(
sock_ctx
,
domain
,
type
,
proto
);
}
int
assuan_sock_connect
(
assuan_fd_t
sockfd
,
struct
sockaddr
*
addr
,
int
addrlen
)
{
return
_assuan_sock_connect
(
sock_ctx
,
sockfd
,
addr
,
addrlen
);
}
int
assuan_sock_bind
(
assuan_fd_t
sockfd
,
struct
sockaddr
*
addr
,
int
addrlen
)
{
return
_assuan_sock_bind
(
sock_ctx
,
sockfd
,
addr
,
addrlen
);
}
int
assuan_sock_get_nonce
(
struct
sockaddr
*
addr
,
int
addrlen
,
assuan_sock_nonce_t
*
nonce
)
{
return
_assuan_sock_get_nonce
(
sock_ctx
,
addr
,
addrlen
,
nonce
);
}
int
assuan_sock_check_nonce
(
assuan_fd_t
fd
,
assuan_sock_nonce_t
*
nonce
)
{
return
_assuan_sock_check_nonce
(
sock_ctx
,
fd
,
nonce
);
}
File Metadata
Details
Attached
Mime Type
text/x-c
Expires
Mon, Dec 23, 1:31 PM (2 h, 11 m)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
8c/f9/05bef8fb3e6f94b4429804d9d393
Attached To
rA Assuan
Event Timeline
Log In to Comment