mirror of
https://git.tartarus.org/simon/putty.git
synced 2025-01-10 01:48:00 +00:00
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
|
/*
|
||
|
|
* Implementation of get_username() for Windows.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "putty.h"
|
||
|
|
|
||
|
|
#ifndef SECURITY_WIN32
|
||
|
|
#define SECURITY_WIN32
|
||
|
|
#endif
|
||
|
|
#include <security.h>
|
||
|
|
|
||
|
|
char *get_username(void)
|
||
|
|
{
|
||
|
|
DWORD namelen;
|
||
|
|
char *user;
|
||
|
|
bool got_username = false;
|
||
|
|
DECL_WINDOWS_FUNCTION(static, BOOLEAN, GetUserNameExA,
|
||
|
|
(EXTENDED_NAME_FORMAT, LPSTR, PULONG));
|
||
|
|
|
||
|
|
{
|
||
|
|
static bool tried_usernameex = false;
|
||
|
|
if (!tried_usernameex) {
|
||
|
|
/* Not available on Win9x, so load dynamically */
|
||
|
|
HMODULE secur32 = load_system32_dll("secur32.dll");
|
||
|
|
/* If MIT Kerberos is installed, the following call to
|
||
|
|
GET_WINDOWS_FUNCTION makes Windows implicitly load
|
||
|
|
sspicli.dll WITHOUT proper path sanitizing, so better
|
||
|
|
load it properly before */
|
||
|
|
HMODULE sspicli = load_system32_dll("sspicli.dll");
|
||
|
|
(void)sspicli; /* squash compiler warning about unused variable */
|
||
|
|
GET_WINDOWS_FUNCTION(secur32, GetUserNameExA);
|
||
|
|
tried_usernameex = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (p_GetUserNameExA) {
|
||
|
|
/*
|
||
|
|
* If available, use the principal -- this avoids the problem
|
||
|
|
* that the local username is case-insensitive but Kerberos
|
||
|
|
* usernames are case-sensitive.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Get the length */
|
||
|
|
namelen = 0;
|
||
|
|
(void) p_GetUserNameExA(NameUserPrincipal, NULL, &namelen);
|
||
|
|
|
||
|
|
user = snewn(namelen, char);
|
||
|
|
got_username = p_GetUserNameExA(NameUserPrincipal, user, &namelen);
|
||
|
|
if (got_username) {
|
||
|
|
char *p = strchr(user, '@');
|
||
|
|
if (p) *p = 0;
|
||
|
|
} else {
|
||
|
|
sfree(user);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!got_username) {
|
||
|
|
/* Fall back to local user name */
|
||
|
|
namelen = 0;
|
||
|
|
if (!GetUserName(NULL, &namelen)) {
|
||
|
|
/*
|
||
|
|
* Apparently this doesn't work at least on Windows XP SP2.
|
||
|
|
* Thus assume a maximum of 256. It will fail again if it
|
||
|
|
* doesn't fit.
|
||
|
|
*/
|
||
|
|
namelen = 256;
|
||
|
|
}
|
||
|
|
|
||
|
|
user = snewn(namelen, char);
|
||
|
|
got_username = GetUserName(user, &namelen);
|
||
|
|
if (!got_username) {
|
||
|
|
sfree(user);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return got_username ? user : NULL;
|
||
|
|
}
|