576 lines
15 KiB
C
576 lines
15 KiB
C
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/****************************************************************************
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PROGRAM: TOKEN.C
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PURPOSE: Contains routines that manipulate tokens
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****************************************************************************/
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#include "SECEDIT.h"
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HANDLE AllocMyToken(VOID);
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BOOL ReadMyToken(HANDLE);
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BOOL WriteMyToken(HWND, HANDLE);
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BOOL FreeMyToken(HANDLE);
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HANDLE OpenToken(HANDLE, ACCESS_MASK);
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BOOL CloseToken(HANDLE);
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PVOID AllocTokenInfo(HANDLE, TOKEN_INFORMATION_CLASS);
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BOOL GetTokenInfo(HANDLE, TOKEN_INFORMATION_CLASS, PPVOID);
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BOOL SetTokenInfo(HANDLE, TOKEN_INFORMATION_CLASS, PVOID);
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BOOL FreeTokenInfo(PVOID);
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/****************************************************************************
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FUNCTION: OpenMyToken
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PURPOSE: Opens the token of the process of the specified window.
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RETURNS : Handle to mytoken on success, or NULL on failure.
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****************************************************************************/
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HANDLE OpenMyToken(
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HWND hwnd)
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{
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DWORD ThreadId;
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DWORD ProcessId;
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PMYTOKEN pMyToken;
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HANDLE hMyToken;
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ThreadId = GetWindowThreadProcessId(hwnd, &ProcessId);
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DbgPrint("Process Id = %ld, ThreadId = %ld\n", ProcessId, ThreadId);
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if (ThreadId == 0) {
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DbgPrint("SECEDIT: GetWindowThreadProcessId failed\n");
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return(NULL);
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}
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//
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// Build a MYTOKEN structure.
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hMyToken = AllocMyToken();
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if (hMyToken == NULL) {
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return(NULL);
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}
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pMyToken = (PMYTOKEN)hMyToken;
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pMyToken->ProcessId = ProcessId;
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pMyToken->ThreadId = ThreadId;
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if (!ReadMyToken(hMyToken)) {
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DbgPrint("SECEDIT : Failed to read token info\n");
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Free(pMyToken);
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return(NULL);
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}
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return(hMyToken);
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}
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/****************************************************************************
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FUNCTION: ReadMyToken
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PURPOSE: Reads the token info and stores in mytoken structure
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RETURNS : TRUE on success, FALSE on failure
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****************************************************************************/
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BOOL ReadMyToken(
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HANDLE hMyToken)
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{
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HANDLE Token;
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PMYTOKEN pMyToken = (PMYTOKEN)hMyToken;
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Token = OpenToken(hMyToken, TOKEN_QUERY);
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if (Token == NULL) {
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DbgPrint("SECEDIT : Failed to open the token with TOKEN_QUERY access\n");
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return(FALSE);
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}
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if (!GetTokenInfo(Token, TokenStatistics, (PPVOID)&(pMyToken->TokenStats))) {
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DbgPrint("SECEDIT : Failed to read token statistics from token\n");
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}
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if (!GetTokenInfo(Token, TokenGroups, (PPVOID)&(pMyToken->Groups))) {
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DbgPrint("SECEDIT : Failed to read group info from token\n");
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}
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if (!GetTokenInfo(Token, TokenUser, (PPVOID)&(pMyToken->UserId))) {
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DbgPrint("SECEDIT : Failed to read userid from token\n");
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}
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if (!GetTokenInfo(Token, TokenOwner, (PPVOID)&(pMyToken->DefaultOwner))) {
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DbgPrint("SECEDIT : Failed to read default owner from token\n");
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}
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if (!GetTokenInfo(Token, TokenPrimaryGroup, (PPVOID)&(pMyToken->PrimaryGroup))) {
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DbgPrint("SECEDIT : Failed to read primary group from token\n");
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}
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if (!GetTokenInfo(Token, TokenPrivileges, (PPVOID)&(pMyToken->Privileges))) {
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DbgPrint("SECEDIT : Failed to read privilege info from token\n");
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}
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CloseToken(Token);
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return(TRUE);
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}
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/****************************************************************************
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FUNCTION: CloseMyToken
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PURPOSE: Closes the specified mytoken handle
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If fSaveChanges = TRUE, the token information is saved,
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otherwise it is discarded.
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RETURNS : TRUE on success, FALSE on failure.
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****************************************************************************/
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BOOL CloseMyToken(
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HWND hDlg,
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HANDLE hMyToken,
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BOOL fSaveChanges)
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{
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if (fSaveChanges) {
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WriteMyToken(hDlg, hMyToken);
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}
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return FreeMyToken(hMyToken);
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}
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/****************************************************************************
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FUNCTION: AllocMyToken
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PURPOSE: Allocates space for mytoken structure.
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RETURNS : HANDLE to mytoken or NULL on failure.
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****************************************************************************/
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HANDLE AllocMyToken(VOID)
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{
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PMYTOKEN pMyToken;
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pMyToken = (PMYTOKEN)Alloc(sizeof(MYTOKEN));
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return((HANDLE)pMyToken);
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}
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/****************************************************************************
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FUNCTION: FreeMyToken
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PURPOSE: Frees the memory allocated to mytoken structure.
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RETURNS : TRUE on success, FALSE on failure.
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****************************************************************************/
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BOOL FreeMyToken(
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HANDLE hMyToken)
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{
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PMYTOKEN pMyToken = (PMYTOKEN)hMyToken;
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if (pMyToken->TokenStats != NULL) {
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FreeTokenInfo((PVOID)(pMyToken->TokenStats));
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}
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if (pMyToken->UserId != NULL) {
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FreeTokenInfo((PVOID)(pMyToken->UserId));
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}
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if (pMyToken->PrimaryGroup != NULL) {
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FreeTokenInfo((PVOID)(pMyToken->PrimaryGroup));
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}
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if (pMyToken->DefaultOwner != NULL) {
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FreeTokenInfo((PVOID)(pMyToken->DefaultOwner));
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}
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if (pMyToken->Groups != NULL) {
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FreeTokenInfo((PVOID)(pMyToken->Groups));
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}
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if (pMyToken->Privileges != NULL) {
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FreeTokenInfo((PVOID)(pMyToken->Privileges));
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}
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Free((PVOID)pMyToken);
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return(TRUE);
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}
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/****************************************************************************
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FUNCTION: WriteMyToken
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PURPOSE: Writes the token information out to the token
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RETURNS : TRUE on success, FALSE on failure.
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****************************************************************************/
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BOOL WriteMyToken(
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HWND hDlg,
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HANDLE hMyToken)
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{
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PMYTOKEN pMyToken = (PMYTOKEN)hMyToken;
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HANDLE Token;
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//
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// Save default owner and primary group
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//
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Token = OpenToken(hMyToken, TOKEN_ADJUST_DEFAULT);
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if (Token == NULL) {
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DbgPrint("SECEDIT: Failed to open token with TOKEN_ADJUST_DEFAULT access\n");
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MessageBox(hDlg, "Failed to open token with access required\nUnable to change default owner or primary group", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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} else {
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// Set default owner
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//
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if ((pMyToken->DefaultOwner != NULL) &&
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(!SetTokenInfo(Token, TokenOwner, (PVOID)(pMyToken->DefaultOwner)))) {
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MessageBox(hDlg, "Failed to set default owner", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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}
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// Set primary group
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//
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if ((pMyToken->PrimaryGroup != NULL) &&
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(!SetTokenInfo(Token, TokenPrimaryGroup, (PVOID)(pMyToken->PrimaryGroup)))) {
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MessageBox(hDlg, "Failed to set primary group", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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}
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CloseToken(Token);
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}
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//
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// Save group info
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//
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Token = OpenToken(hMyToken, TOKEN_ADJUST_GROUPS);
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if (Token == NULL) {
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DbgPrint("SECEDIT: Failed to open token with TOKEN_ADJUST_GROUPS access\n");
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MessageBox(hDlg, "Failed to open token with access required\nUnable to change group settings", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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} else {
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if ((pMyToken->Groups != NULL) &&
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(!SetTokenInfo(Token, TokenGroups, (PVOID)(pMyToken->Groups)))) {
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MessageBox(hDlg, "Failed to change group settings", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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}
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CloseToken(Token);
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}
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//
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// Change privileges
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//
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Token = OpenToken(hMyToken, TOKEN_ADJUST_PRIVILEGES);
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if (Token == NULL) {
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DbgPrint("SECEDIT: Failed to open token with TOKEN_ADJUST_PRIVILEGES access\n");
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MessageBox(hDlg, "Failed to open token with access required\nUnable to change privilege settings", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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} else {
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if ((pMyToken->Privileges != NULL) &&
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(!SetTokenInfo(Token, TokenPrivileges, (PVOID)(pMyToken->Privileges)))) {
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MessageBox(hDlg, "Failed to change privilege settings", NULL, MB_ICONSTOP | MB_APPLMODAL | MB_OK);
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}
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CloseToken(Token);
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}
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return(TRUE);
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}
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/****************************************************************************
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FUNCTION: OpenToken
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PURPOSE: Opens the token with the specified access
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RETURNS : Handle to token on success, or NULL on failure.
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****************************************************************************/
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HANDLE OpenToken(
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HANDLE hMyToken,
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ACCESS_MASK DesiredAccess)
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{
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NTSTATUS Status;
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HANDLE Token;
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HANDLE Process;
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PMYTOKEN pMyToken = (PMYTOKEN)hMyToken;
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DWORD ThreadId = pMyToken->ThreadId;
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DWORD ProcessId = pMyToken->ProcessId;
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Process = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, ProcessId);
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if (Process == NULL) {
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DbgPrint("SECEDIT: OpenProcess failed, last error = %ld\n", GetLastError());
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return(NULL);
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}
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Status = NtOpenProcessToken(
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Process,
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DesiredAccess,
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&Token
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);
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CloseHandle(Process);
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if (!NT_SUCCESS(Status)) {
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DbgPrint("SECEDIT: Failed to open token with access = 0x%x, status = 0x%lx\n", DesiredAccess, Status);
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return(NULL);
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}
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return(Token);
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}
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/****************************************************************************
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FUNCTION: CloseToken
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PURPOSE: Closes the specified token handle
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RETURNS : TRUE on success, FALSE on failure.
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****************************************************************************/
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BOOL CloseToken(
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HANDLE Token)
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{
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NTSTATUS Status;
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Status = NtClose(Token);
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return(TRUE);
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}
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/****************************************************************************
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FUNCTION: AllocTokenInfo
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PURPOSE: Allocates memory to hold the parameter that
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NTQueryInformationToken will return.
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Memory should be freed later using FreeTokenInfo
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RETURNS : Pointer to allocated memory or NULL on failure
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****************************************************************************/
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PVOID AllocTokenInfo(
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HANDLE Token,
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TOKEN_INFORMATION_CLASS TokenInformationClass)
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{
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NTSTATUS Status;
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ULONG InfoLength;
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Status = NtQueryInformationToken(
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Token, // Handle
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TokenInformationClass, // TokenInformationClass
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NULL, // TokenInformation
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0, // TokenInformationLength
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&InfoLength // ReturnLength
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);
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if (Status != STATUS_BUFFER_TOO_SMALL) {
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#ifdef NTBUILD
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DbgPrint("SECEDIT: NtQueryInformationToken did NOT return buffer_too_small, status = 0x%lx\n", Status);
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#endif
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return(NULL);
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}
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return Alloc(InfoLength);
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}
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/****************************************************************************
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FUNCTION: FreeTokenInfo
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PURPOSE: Frees the memory previously allocated with AllocTokenInfo
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RETURNS : TRUE on success, otherwise FALSE
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****************************************************************************/
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BOOL FreeTokenInfo(
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PVOID Buffer)
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{
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return(Free(Buffer));
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}
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/****************************************************************************
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|
FUNCTION: GetTokenInfo
|
||
|
|
|
||
|
|
PURPOSE: Allocates a buffer and reads the specified data
|
||
|
|
out of the token and into it.
|
||
|
|
|
||
|
|
RETURNS : TRUE on success otherwise FALSE.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
BOOL GetTokenInfo(
|
||
|
|
HANDLE Token,
|
||
|
|
TOKEN_INFORMATION_CLASS TokenInformationClass,
|
||
|
|
PPVOID pBuffer)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
ULONG BufferSize;
|
||
|
|
ULONG InfoLength;
|
||
|
|
PVOID Buffer;
|
||
|
|
|
||
|
|
*pBuffer = NULL; // Prepare for failure
|
||
|
|
|
||
|
|
Buffer = AllocTokenInfo(Token, TokenInformationClass);
|
||
|
|
if (Buffer == NULL) {
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
BufferSize = (ULONG)GetAllocSize(Buffer);
|
||
|
|
|
||
|
|
Status = NtQueryInformationToken(
|
||
|
|
Token, // Handle
|
||
|
|
TokenInformationClass, // TokenInformationClass
|
||
|
|
Buffer, // TokenInformation
|
||
|
|
BufferSize, // TokenInformationLength
|
||
|
|
&InfoLength // ReturnLength
|
||
|
|
);
|
||
|
|
|
||
|
|
if (!NT_SUCCESS(Status)) {
|
||
|
|
#ifdef NTBUILD
|
||
|
|
DbgPrint("SECEDIT: NtQueryInformationToken failed, status = 0x%lx\n", Status);
|
||
|
|
#endif
|
||
|
|
FreeTokenInfo(Buffer);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (InfoLength > BufferSize) {
|
||
|
|
#ifdef NTBUILD
|
||
|
|
DbgPrint("SECEDIT: NtQueryInformationToken failed, DataSize > BufferSize");
|
||
|
|
#endif
|
||
|
|
FreeTokenInfo(Buffer);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
*pBuffer = Buffer;
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
FUNCTION: SetTokenInfo
|
||
|
|
|
||
|
|
PURPOSE: Sets the specified information in the given token.
|
||
|
|
|
||
|
|
RETURNS : TRUE on success otherwise FALSE.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
BOOL SetTokenInfo(
|
||
|
|
HANDLE Token,
|
||
|
|
TOKEN_INFORMATION_CLASS TokenInformationClass,
|
||
|
|
PVOID Buffer)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
ULONG BufferSize;
|
||
|
|
|
||
|
|
BufferSize = (ULONG)GetAllocSize(Buffer);
|
||
|
|
|
||
|
|
switch (TokenInformationClass) {
|
||
|
|
|
||
|
|
case TokenOwner:
|
||
|
|
case TokenPrimaryGroup:
|
||
|
|
case TokenDefaultDacl:
|
||
|
|
|
||
|
|
Status = NtSetInformationToken(
|
||
|
|
Token, // Handle
|
||
|
|
TokenInformationClass, // TokenInformationClass
|
||
|
|
Buffer, // TokenInformation
|
||
|
|
BufferSize // TokenInformationLength
|
||
|
|
);
|
||
|
|
|
||
|
|
if (!NT_SUCCESS(Status)) {
|
||
|
|
DbgPrint("SECEDIT: NtSetInformationToken failed, info class = 0x%x, status = 0x%lx\n",
|
||
|
|
TokenInformationClass, Status);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
|
||
|
|
case TokenGroups:
|
||
|
|
|
||
|
|
Status = NtAdjustGroupsToken(
|
||
|
|
Token, // Handle
|
||
|
|
FALSE, // Reset to default
|
||
|
|
(PTOKEN_GROUPS)Buffer, // New State
|
||
|
|
BufferSize, // Buffer Length
|
||
|
|
NULL, // Previous State
|
||
|
|
NULL // Return Length
|
||
|
|
);
|
||
|
|
|
||
|
|
if (!NT_SUCCESS(Status)) {
|
||
|
|
DbgPrint("SECEDIT: NtAdjustGroupsToken failed, status = 0x%lx\n", Status);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
|
||
|
|
case TokenPrivileges:
|
||
|
|
|
||
|
|
Status = NtAdjustPrivilegesToken(
|
||
|
|
Token, // Handle
|
||
|
|
FALSE, // Disable all privileges
|
||
|
|
(PTOKEN_PRIVILEGES)Buffer, // New State
|
||
|
|
BufferSize, // Buffer Length
|
||
|
|
NULL, // Previous State
|
||
|
|
NULL // Return Length
|
||
|
|
);
|
||
|
|
|
||
|
|
if (!NT_SUCCESS(Status)) {
|
||
|
|
DbgPrint("SECEDIT: NtAdjustPrivilegesToken failed, status = 0x%lx\n", Status);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
// Unrecognised information type
|
||
|
|
DbgPrint("SECEDIT: SetTokenInfo passed unrecognised infoclass, class = 0x%x\n", TokenInformationClass);
|
||
|
|
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|