[SERVICES]

- Create a default service security descriptor.
- RCreateServiceW: Assign the default security descriptor to new services on service creation and store it in the registry.
- RQueryServiceObjectSecurity: Return the services security descriptor to the caller.

svn path=/trunk/; revision=71603

reactos/base/system/services/CMakeLists.txt

@@ -14,6 +14,7 @@ list(APPEND SOURCE
     groupdb.c
     lock.c
     rpcserver.c
+    security.c
     services.c
     services.h
     ${CMAKE_CURRENT_BINARY_DIR}/svcctl_s.c)

reactos/base/system/services/config.c

@@ -498,4 +498,154 @@ done:
     return dwError;
 }
 
+
+DWORD
+ScmWriteSecurityDescriptor(
+    _In_ HKEY hServiceKey,
+    _In_ PSECURITY_DESCRIPTOR pSecurityDescriptor)
+{
+    PSECURITY_DESCRIPTOR pRelativeSD = NULL;
+    HKEY hSecurityKey = NULL;
+    DWORD dwBufferLength = 0;
+    DWORD dwDisposition;
+    DWORD dwError;
+    NTSTATUS Status;
+
+    DPRINT1("ScmWriteSecurityDescriptor(%p %p)\n", hServiceKey, pSecurityDescriptor);
+
+    Status = RtlAbsoluteToSelfRelativeSD(pSecurityDescriptor,
+                                         NULL,
+                                         &dwBufferLength);
+    if (Status != STATUS_BUFFER_TOO_SMALL)
+    {
+DPRINT1("\n");
+        return RtlNtStatusToDosError(Status);
+    }
+
+    DPRINT1("BufferLength %lu\n", dwBufferLength);
+
+    pRelativeSD = RtlAllocateHeap(RtlGetProcessHeap(),
+                                  HEAP_ZERO_MEMORY,
+                                  dwBufferLength);
+    if (pRelativeSD == NULL)
+    {
+DPRINT1("\n");
+        return ERROR_OUTOFMEMORY;
+    }
+
+DPRINT1("\n");
+    Status = RtlAbsoluteToSelfRelativeSD(pSecurityDescriptor,
+                                         pRelativeSD,
+                                         &dwBufferLength);
+    if (!NT_SUCCESS(Status))
+    {
+DPRINT1("\n");
+        dwError = RtlNtStatusToDosError(Status);
+        goto done;
+    }
+
+DPRINT1("\n");
+    dwError = RegCreateKeyExW(hServiceKey,
+                              L"Security",
+                              0,
+                              NULL,
+                              REG_OPTION_NON_VOLATILE,
+                              KEY_SET_VALUE,
+                              NULL,
+                              &hSecurityKey,
+                              &dwDisposition);
+    if (dwError != ERROR_SUCCESS)
+    {
+DPRINT1("\n");
+        goto done;
+    }
+
+DPRINT1("\n");
+    dwError = RegSetValueExW(hSecurityKey,
+                             L"Security",
+                             0,
+                             REG_BINARY,
+                             (LPBYTE)pRelativeSD,
+                             dwBufferLength);
+DPRINT1("\n");
+
+done:
+    if (hSecurityKey != NULL)
+        RegCloseKey(hSecurityKey);
+
+    if (pRelativeSD != NULL)
+        RtlFreeHeap(RtlGetProcessHeap(), 0, pRelativeSD);
+
+    return dwError;
+}
+
+
+DWORD
+ScmReadSecurityDescriptor(
+    _In_ HKEY hServiceKey,
+    _Out_ PSECURITY_DESCRIPTOR *ppSecurityDescriptor)
+{
+    PSECURITY_DESCRIPTOR pRelativeSD = NULL;
+    HKEY hSecurityKey = NULL;
+    DWORD dwBufferLength = 0;
+    DWORD dwType;
+    DWORD dwError;
+
+    dwError = RegOpenKeyExW(hServiceKey,
+                            L"Security",
+                            0,
+                            KEY_QUERY_VALUE,
+                            &hSecurityKey);
+    if (dwError != ERROR_SUCCESS)
+    {
+DPRINT1("\n");
+        goto done;
+    }
+
+    dwError = RegQueryValueExW(hSecurityKey,
+                               L"Security",
+                               0,
+                               &dwType,
+                               NULL,
+                               &dwBufferLength);
+    if (dwError != ERROR_SUCCESS)
+    {
+DPRINT1("\n");
+        goto done;
+    }
+
+    pRelativeSD = RtlAllocateHeap(RtlGetProcessHeap(),
+                                  HEAP_ZERO_MEMORY,
+                                  dwBufferLength);
+    if (pRelativeSD == NULL)
+    {
+DPRINT1("\n");
+        return ERROR_OUTOFMEMORY;
+    }
+
+    dwError = RegQueryValueExW(hSecurityKey,
+                               L"Security",
+                               0,
+                               &dwType,
+                               (LPBYTE)pRelativeSD,
+                               &dwBufferLength);
+    if (dwError != ERROR_SUCCESS)
+    {
+DPRINT1("\n");
+        goto done;
+    }
+
+
+
+done:
+    if (pRelativeSD != NULL)
+        RtlFreeHeap(RtlGetProcessHeap(), 0, pRelativeSD);
+
+    if (hSecurityKey != NULL)
+        RegCloseKey(hSecurityKey);
+
+
+    return dwError;
+}
+
 /* EOF */

reactos/base/system/services/rpcserver.c

@@ -1364,9 +1364,6 @@ DWORD RQueryServiceObjectSecurity(
     DWORD dwBytesNeeded;
     DWORD dwError;
 
-
-    SECURITY_DESCRIPTOR ObjectDescriptor;
-
     DPRINT("RQueryServiceObjectSecurity() called\n");
 
     hSvc = ScmGetServiceFromHandle(hService);
@@ -1401,11 +1398,8 @@ DWORD RQueryServiceObjectSecurity(
     /* Lock the service database */
     ScmLockDatabaseShared();
 
-
-    /* hack */
-    Status = RtlCreateSecurityDescriptor(&ObjectDescriptor, SECURITY_DESCRIPTOR_REVISION);
-
-    Status = RtlQuerySecurityObject(&ObjectDescriptor  /* lpService->lpSecurityDescriptor */,
+    /* Retrieve the security descriptor */
+    Status = RtlQuerySecurityObject(lpService->pSecurityDescriptor,
                                     dwSecurityInformation,
                                     (PSECURITY_DESCRIPTOR)lpSecurityDescriptor,
                                     cbBufSize,
@@ -2258,6 +2252,12 @@ DWORD RCreateServiceW(
             goto done;
     }
 
+    /* Assign the default security descriptor */
+    if (dwServiceType & SERVICE_WIN32)
+    {
+        lpService->pSecurityDescriptor = pDefaultServiceSD;
+    }
+
     /* Write service data to the registry */
     /* Create the service key */
     dwError = ScmCreateServiceKey(lpServiceName,
@@ -2391,6 +2391,13 @@ DWORD RCreateServiceW(
             if (dwError != ERROR_SUCCESS)
                 goto done;
         }
+
+DPRINT1("\n");
+        /* Write the security descriptor */
+        dwError = ScmWriteSecurityDescriptor(hServiceKey,
+                                             lpService->pSecurityDescriptor);
+        if (dwError != ERROR_SUCCESS)
+            goto done;
     }
 
     dwError = ScmCreateServiceHandle(lpService,

reactos/base/system/services/security.c

@@ -0,0 +1,268 @@
+/*
+ * PROJECT:     ReactOS Service Control Manager
+ * LICENSE:     GPL - See COPYING in the top level directory
+ * FILE:        base/system/services/security.c
+ * PURPOSE:     Security functions
+ * COPYRIGHT:   Eric Kohl
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include "services.h"
+
+#define NDEBUG
+#include <debug.h>
+
+PSECURITY_DESCRIPTOR pDefaultServiceSD = NULL;
+
+static PSID pNullSid = NULL;
+static PSID pLocalSystemSid = NULL;
+static PSID pAuthenticatedUserSid = NULL;
+static PSID pAliasAdminsSid = NULL;
+
+
+/* FUNCTIONS ****************************************************************/
+
+static
+VOID
+ScmFreeSids(VOID)
+{
+    if (pNullSid != NULL)
+        RtlFreeHeap(RtlGetProcessHeap(), 0, pNullSid);
+
+    if (pLocalSystemSid != NULL)
+        RtlFreeHeap(RtlGetProcessHeap(), 0, pLocalSystemSid);
+
+    if (pAuthenticatedUserSid != NULL)
+        RtlFreeHeap(RtlGetProcessHeap(), 0, pAuthenticatedUserSid);
+
+    if (pAliasAdminsSid != NULL)
+        RtlFreeHeap(RtlGetProcessHeap(), 0, pAliasAdminsSid);
+
+}
+
+
+static
+DWORD
+ScmCreateSids(VOID)
+{
+    SID_IDENTIFIER_AUTHORITY NullAuthority = {SECURITY_NULL_SID_AUTHORITY};
+    SID_IDENTIFIER_AUTHORITY NtAuthority = {SECURITY_NT_AUTHORITY};
+    PULONG pSubAuthority;
+    ULONG ulLength1 = RtlLengthRequiredSid(1);
+    ULONG ulLength2 = RtlLengthRequiredSid(2);
+
+    /* Create the Null SID */
+    pNullSid = RtlAllocateHeap(RtlGetProcessHeap(), 0, ulLength1);
+    if (pNullSid == NULL)
+    {
+        return ERROR_OUTOFMEMORY;
+    }
+
+    RtlInitializeSid(pNullSid, &NullAuthority, 1);
+    pSubAuthority = RtlSubAuthoritySid(pNullSid, 0);
+    *pSubAuthority = SECURITY_NULL_RID;
+
+    /* Create the LocalSystem SID */
+    pLocalSystemSid = RtlAllocateHeap(RtlGetProcessHeap(), 0, ulLength1);
+    if (pLocalSystemSid == NULL)
+    {
+        return ERROR_OUTOFMEMORY;
+    }
+
+    RtlInitializeSid(pLocalSystemSid, &NtAuthority, 1);
+    pSubAuthority = RtlSubAuthoritySid(pLocalSystemSid, 0);
+    *pSubAuthority = SECURITY_LOCAL_SYSTEM_RID;
+
+    /* Create the AuthenticatedUser SID */
+    pAuthenticatedUserSid = RtlAllocateHeap(RtlGetProcessHeap(), 0, ulLength1);
+    if (pAuthenticatedUserSid == NULL)
+    {
+        return ERROR_OUTOFMEMORY;
+    }
+
+    RtlInitializeSid(pAuthenticatedUserSid, &NtAuthority, 1);
+    pSubAuthority = RtlSubAuthoritySid(pAuthenticatedUserSid, 0);
+    *pSubAuthority = SECURITY_AUTHENTICATED_USER_RID;
+
+    /* Create the AliasAdmins SID */
+    pAliasAdminsSid = RtlAllocateHeap(RtlGetProcessHeap(), 0, ulLength2);
+    if (pAliasAdminsSid == NULL)
+    {
+        return ERROR_OUTOFMEMORY;
+    }
+
+    RtlInitializeSid(pAliasAdminsSid, &NtAuthority, 2);
+    pSubAuthority = RtlSubAuthoritySid(pAliasAdminsSid, 0);
+    *pSubAuthority = SECURITY_BUILTIN_DOMAIN_RID;
+    pSubAuthority = RtlSubAuthoritySid(pAliasAdminsSid, 1);
+    *pSubAuthority = DOMAIN_ALIAS_RID_ADMINS;
+
+    return ERROR_SUCCESS;
+}
+
+
+static
+DWORD
+ScmCreateDefaultServiceSD(VOID)
+{
+    PSECURITY_DESCRIPTOR pServiceSD = NULL;
+    PACL pDacl = NULL;
+    PACL pSacl = NULL;
+    ULONG ulLength;
+    NTSTATUS Status;
+    DWORD dwError = ERROR_SUCCESS;
+
+    /* Create DACL */
+    ulLength = sizeof(ACL) +
+               (sizeof(ACE) + RtlLengthSid(pLocalSystemSid)) +
+               (sizeof(ACE) + RtlLengthSid(pAliasAdminsSid)) +
+               (sizeof(ACE) + RtlLengthSid(pAuthenticatedUserSid));
+
+    pDacl = RtlAllocateHeap(RtlGetProcessHeap(), HEAP_ZERO_MEMORY, ulLength);
+    if (pDacl == NULL)
+    {
+        dwError = ERROR_OUTOFMEMORY;
+        goto done;
+    }
+
+    RtlCreateAcl(pDacl, ulLength, ACL_REVISION);
+
+    RtlAddAccessAllowedAce(pDacl,
+                           ACL_REVISION,
+                           READ_CONTROL | SERVICE_ENUMERATE_DEPENDENTS | SERVICE_INTERROGATE |
+                           SERVICE_PAUSE_CONTINUE | SERVICE_QUERY_CONFIG | SERVICE_QUERY_STATUS |
+                           SERVICE_START | SERVICE_STOP | SERVICE_USER_DEFINED_CONTROL,
+                           pLocalSystemSid);
+
+    RtlAddAccessAllowedAce(pDacl,
+                           ACL_REVISION,
+                           SERVICE_ALL_ACCESS,
+                           pAliasAdminsSid);
+
+    RtlAddAccessAllowedAce(pDacl,
+                           ACL_REVISION,
+                           READ_CONTROL | SERVICE_ENUMERATE_DEPENDENTS | SERVICE_INTERROGATE |
+                           SERVICE_QUERY_CONFIG | SERVICE_QUERY_STATUS | SERVICE_USER_DEFINED_CONTROL,
+                           pAuthenticatedUserSid);
+
+    /* Create SACL */
+    ulLength = sizeof(ACL) +
+               (sizeof(ACE) + RtlLengthSid(pNullSid));
+
+    pSacl = RtlAllocateHeap(RtlGetProcessHeap(), HEAP_ZERO_MEMORY, ulLength);
+    if (pSacl == NULL)
+    {
+        dwError = ERROR_OUTOFMEMORY;
+        goto done;
+    }
+
+    RtlCreateAcl(pSacl, ulLength, ACL_REVISION);
+
+    RtlAddAuditAccessAce(pSacl,
+                         ACL_REVISION,
+                         SERVICE_ALL_ACCESS,
+                         pNullSid,
+                         FALSE,
+                         TRUE);
+
+
+    pServiceSD = RtlAllocateHeap(RtlGetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SECURITY_DESCRIPTOR));
+    if (pServiceSD == NULL)
+    {
+        dwError = ERROR_OUTOFMEMORY;
+        goto done;
+    }
+DPRINT1("pServiceSD %p\n", pServiceSD);
+
+    Status = RtlCreateSecurityDescriptor(pServiceSD,
+                                         SECURITY_DESCRIPTOR_REVISION);
+    if (!NT_SUCCESS(Status))
+    {
+        dwError = RtlNtStatusToDosError(Status);
+        goto done;
+    }
+
+    Status = RtlSetOwnerSecurityDescriptor(pServiceSD,
+                                           pLocalSystemSid,
+                                           FALSE);
+    if (!NT_SUCCESS(Status))
+    {
+        dwError = RtlNtStatusToDosError(Status);
+        goto done;
+    }
+
+    Status = RtlSetGroupSecurityDescriptor(pServiceSD,
+                                           pLocalSystemSid,
+                                           FALSE);
+    if (!NT_SUCCESS(Status))
+    {
+        dwError = RtlNtStatusToDosError(Status);
+        goto done;
+    }
+
+    Status = RtlSetDaclSecurityDescriptor(pServiceSD,
+                                          TRUE,
+                                          pDacl,
+                                          FALSE);
+    if (!NT_SUCCESS(Status))
+    {
+        dwError = RtlNtStatusToDosError(Status);
+        goto done;
+    }
+
+    Status = RtlSetSaclSecurityDescriptor(pServiceSD,
+                                          TRUE,
+                                          pSacl,
+                                          FALSE);
+    if (!NT_SUCCESS(Status))
+    {
+        dwError = RtlNtStatusToDosError(Status);
+        goto done;
+    }
+
+
+    pDefaultServiceSD = pServiceSD;
+DPRINT1("pDefaultServiceSD %p\n", pDefaultServiceSD);
+
+done:
+    if (dwError != ERROR_SUCCESS)
+    {
+        if (pDacl != NULL)
+            RtlFreeHeap(RtlGetProcessHeap(), 0, pDacl);
+
+        if (pSacl != NULL)
+            RtlFreeHeap(RtlGetProcessHeap(), 0, pSacl);
+
+        if (pServiceSD != NULL)
+            RtlFreeHeap(RtlGetProcessHeap(), 0, pServiceSD);
+    }
+
+    return dwError;
+}
+
+
+DWORD
+ScmInitializeSecurity(VOID)
+{
+    DWORD dwError;
+
+    dwError = ScmCreateSids();
+    if (dwError != ERROR_SUCCESS)
+        return dwError;
+
+    dwError = ScmCreateDefaultServiceSD();
+    if (dwError != ERROR_SUCCESS)
+        return dwError;
+
+    return ERROR_SUCCESS;
+}
+
+
+VOID
+ScmShutdownSecurity(VOID)
+{
+    ScmFreeSids();
+}
+
+/* EOF */

reactos/base/system/services/services.c

@@ -354,6 +354,8 @@ wWinMain(HINSTANCE hInstance,
 
 //    ScmInitThreadManager();
 
+    ScmInitializeSecurity();
+
     /* FIXME: more initialization */
 
     /* Read the control set values */
@@ -432,6 +434,8 @@ wWinMain(HINSTANCE hInstance,
     WaitForSingleObject(hScmShutdownEvent, INFINITE);
 
 done:
+    ScmShutdownSecurity();
+
     /* Delete our communication named pipe's critical section */
     if (bCanDeleteNamedPipeCriticalSection == TRUE)
         ScmDeleteNamedPipeCriticalSection();

reactos/base/system/services/services.h

@@ -72,7 +72,7 @@ typedef struct _SERVICE
 
     ULONG Flags;
 
-    PSECURITY_DESCRIPTOR lpSecurityDescriptor;
+    PSECURITY_DESCRIPTOR pSecurityDescriptor;
 
     BOOLEAN ServiceVisited;
 
@@ -98,6 +98,8 @@ extern LIST_ENTRY ImageListHead;
 extern BOOL ScmInitialize;
 extern BOOL ScmShutdown;
 
+extern PSECURITY_DESCRIPTOR pDefaultServiceSD;
+
 
 /* FUNCTIONS ***************************************************************/
 
@@ -132,6 +134,12 @@ ScmSetServicePassword(
     IN PCWSTR pszServiceName,
     IN PCWSTR pszPassword);
 
+DWORD
+ScmWriteSecurityDescriptor(
+    _In_ HKEY hServiceKey,
+    _In_ PSECURITY_DESCRIPTOR pSecurityDescriptor);
+
+
 /* controlset.c */
 
 BOOL ScmGetControlSetValues(VOID);
@@ -197,6 +205,12 @@ VOID ScmQueryServiceLockStatusA(OUT LPQUERY_SERVICE_LOCK_STATUSA lpLockStatus);
 VOID ScmStartRpcServer(VOID);
 
 
+/* security.c */
+
+DWORD ScmInitializeSecurity(VOID);
+VOID ScmShutdownSecurity(VOID);
+
+
 /* services.c */
 
 VOID PrintString(LPCSTR fmt, ...);