зеркало из https://github.com/github/putty.git
84 строки
2.5 KiB
C
84 строки
2.5 KiB
C
/*
|
|
* Windows support module which deals with being a named-pipe client.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
|
|
#include "tree234.h"
|
|
#include "putty.h"
|
|
#include "network.h"
|
|
#include "proxy.h"
|
|
#include "ssh.h"
|
|
|
|
#if !defined NO_SECURITY
|
|
|
|
#include "winsecur.h"
|
|
|
|
Socket *new_named_pipe_client(const char *pipename, Plug *plug)
|
|
{
|
|
HANDLE pipehandle;
|
|
PSID usersid, pipeowner;
|
|
PSECURITY_DESCRIPTOR psd;
|
|
|
|
assert(strncmp(pipename, "\\\\.\\pipe\\", 9) == 0);
|
|
assert(strchr(pipename + 9, '\\') == NULL);
|
|
|
|
while (1) {
|
|
pipehandle = CreateFile(pipename, GENERIC_READ | GENERIC_WRITE,
|
|
0, NULL, OPEN_EXISTING,
|
|
FILE_FLAG_OVERLAPPED, NULL);
|
|
|
|
if (pipehandle != INVALID_HANDLE_VALUE)
|
|
break;
|
|
|
|
if (GetLastError() != ERROR_PIPE_BUSY) {
|
|
return new_error_socket_fmt(
|
|
plug, "Unable to open named pipe '%s': %s",
|
|
pipename, win_strerror(GetLastError()));
|
|
}
|
|
|
|
/*
|
|
* If we got ERROR_PIPE_BUSY, wait for the server to
|
|
* create a new pipe instance. (Since the server is
|
|
* expected to be winnps.c, which will do that immediately
|
|
* after a previous connection is accepted, that shouldn't
|
|
* take excessively long.)
|
|
*/
|
|
if (!WaitNamedPipe(pipename, NMPWAIT_USE_DEFAULT_WAIT)) {
|
|
return new_error_socket_fmt(
|
|
plug, "Error waiting for named pipe '%s': %s",
|
|
pipename, win_strerror(GetLastError()));
|
|
}
|
|
}
|
|
|
|
if ((usersid = get_user_sid()) == NULL) {
|
|
CloseHandle(pipehandle);
|
|
return new_error_socket_fmt(
|
|
plug, "Unable to get user SID: %s", win_strerror(GetLastError()));
|
|
}
|
|
|
|
if (p_GetSecurityInfo(pipehandle, SE_KERNEL_OBJECT,
|
|
OWNER_SECURITY_INFORMATION,
|
|
&pipeowner, NULL, NULL, NULL,
|
|
&psd) != ERROR_SUCCESS) {
|
|
CloseHandle(pipehandle);
|
|
return new_error_socket_fmt(
|
|
plug, "Unable to get named pipe security information: %s",
|
|
win_strerror(GetLastError()));
|
|
}
|
|
|
|
if (!EqualSid(pipeowner, usersid)) {
|
|
CloseHandle(pipehandle);
|
|
LocalFree(psd);
|
|
return new_error_socket_fmt(
|
|
plug, "Owner of named pipe '%s' is not us", pipename);
|
|
}
|
|
|
|
LocalFree(psd);
|
|
|
|
return make_handle_socket(pipehandle, pipehandle, NULL, plug, true);
|
|
}
|
|
|
|
#endif /* !defined NO_SECURITY */
|