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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* The NT Groups have two groups that are not well documented and are
* not normally seen: None and Everyone. A user account belongs to
* any number of groups, but if it is not a member of any group then
* it is a member of the None Group. The None group is not listed
* anywhere. You cannot remove an account from the none group except
* by making it a member of some other group, The second group is the
* Everyone group. All accounts, no matter how many groups that they
* belong to, also belong to the Everyone group. You cannot remove an
* account from the Everyone group.
*/
#ifndef UNICODE
#define UNICODE
#endif /* UNICODE */
/*
* Silence warnings.
*/
#define _CRT_SECURE_NO_DEPRECATE 1
/* clang-format off */
#include <assert.h>
#include <windows.h>
#include <lm.h>
/* clang-format on */
#include <isc/ntgroups.h>
#include <isc/result.h>
#define MAX_NAME_LENGTH 256
#define CHECK(op) \
do { \
result = (op); \
if (result != ISC_R_SUCCESS) { \
goto cleanup; \
} \
} while (0)
isc_result_t
isc_ntsecurity_getaccountgroups(char *username, char **GroupList,
unsigned int maxgroups,
unsigned int *totalGroups) {
LPGROUP_USERS_INFO_0 pTmpBuf;
LPLOCALGROUP_USERS_INFO_0 pTmpLBuf;
DWORD i;
LPLOCALGROUP_USERS_INFO_0 pBuf = NULL;
LPGROUP_USERS_INFO_0 pgrpBuf = NULL;
DWORD dwLevel = 0;
DWORD dwFlags = LG_INCLUDE_INDIRECT;
DWORD dwPrefMaxLen = MAX_PREFERRED_LENGTH;
DWORD dwEntriesRead = 0;
DWORD dwTotalEntries = 0;
NET_API_STATUS nStatus;
size_t retlen;
wchar_t user[MAX_NAME_LENGTH];
isc_result_t result;
*totalGroups = 0;
retlen = mbstowcs(user, username, MAX_NAME_LENGTH);
if (retlen == (size_t)(-1)) {
return (ISC_R_FAILURE);
}
/*
* Call the NetUserGetLocalGroups function
* specifying information level 0.
*
* The LG_INCLUDE_INDIRECT flag specifies that the
* function should also return the names of the local
* groups in which the user is indirectly a member.
*/
nStatus = NetUserGetLocalGroups(NULL, user, dwLevel, dwFlags,
(LPBYTE *)&pBuf, dwPrefMaxLen,
&dwEntriesRead, &dwTotalEntries);
/*
* See if the call succeeds,
*/
if (nStatus != NERR_Success) {
if (nStatus == ERROR_ACCESS_DENIED) {
return (ISC_R_NOPERM);
}
if (nStatus == ERROR_MORE_DATA) {
return (ISC_R_NOSPACE);
}
if (nStatus == NERR_UserNotFound) {
dwEntriesRead = 0;
}
}
if (pBuf != NULL) {
pTmpLBuf = pBuf;
/*
* Loop through the entries
*/
for (i = 0; (i < dwEntriesRead && *totalGroups < maxgroups);
i++)
{
assert(pTmpLBuf != NULL);
if (pTmpLBuf == NULL) {
break;
}
retlen = wcslen(pTmpLBuf->lgrui0_name);
GroupList[*totalGroups] = (char *)malloc(retlen + 1);
if (GroupList[*totalGroups] == NULL) {
CHECK(ISC_R_NOMEMORY);
}
retlen = wcstombs(GroupList[*totalGroups],
pTmpLBuf->lgrui0_name, retlen);
if (retlen == (size_t)(-1)) {
free(GroupList[*totalGroups]);
CHECK(ISC_R_FAILURE);
}
GroupList[*totalGroups][retlen] = '\0';
if (strcmp(GroupList[*totalGroups], "None") == 0) {
free(GroupList[*totalGroups]);
} else {
(*totalGroups)++;
}
pTmpLBuf++;
}
}
/* Free the allocated memory. */
/* cppcheck-suppress duplicateCondition */
if (pBuf != NULL) {
NetApiBufferFree(pBuf);
}
/*
* Call the NetUserGetGroups function, specifying level 0.
*/
nStatus = NetUserGetGroups(NULL, user, dwLevel, (LPBYTE *)&pgrpBuf,
dwPrefMaxLen, &dwEntriesRead,
&dwTotalEntries);
/*
* See if the call succeeds,
*/
if (nStatus != NERR_Success) {
if (nStatus == ERROR_ACCESS_DENIED) {
return (ISC_R_NOPERM);
}
if (nStatus == ERROR_MORE_DATA) {
return (ISC_R_NOSPACE);
}
if (nStatus == NERR_UserNotFound) {
dwEntriesRead = 0;
}
}
if (pgrpBuf != NULL) {
pTmpBuf = pgrpBuf;
/*
* Loop through the entries
*/
for (i = 0; (i < dwEntriesRead && *totalGroups < maxgroups);
i++)
{
assert(pTmpBuf != NULL);
if (pTmpBuf == NULL) {
break;
}
retlen = wcslen(pTmpBuf->grui0_name);
GroupList[*totalGroups] = (char *)malloc(retlen + 1);
if (GroupList[*totalGroups] == NULL) {
CHECK(ISC_R_NOMEMORY);
}
retlen = wcstombs(GroupList[*totalGroups],
pTmpBuf->grui0_name, retlen);
if (retlen == (size_t)(-1)) {
free(GroupList[*totalGroups]);
CHECK(ISC_R_FAILURE);
}
GroupList[*totalGroups][retlen] = '\0';
if (strcmp(GroupList[*totalGroups], "None") == 0) {
free(GroupList[*totalGroups]);
} else {
(*totalGroups)++;
}
pTmpBuf++;
}
}
/*
* Free the allocated memory.
*/
/* cppcheck-suppress duplicateCondition */
if (pgrpBuf != NULL) {
NetApiBufferFree(pgrpBuf);
}
return (ISC_R_SUCCESS);
cleanup:
while (--(*totalGroups) > 0) {
free(GroupList[*totalGroups]);
}
return (result);
}
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