1 files changed, 318 insertions, 0 deletions

diff --git a/port.c b/port.c
new file mode 100644
index 0000000..bd99908
--- /dev/null
+++ b/port.c
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2004 Security Architects Corporation. All rights reserved.
+ *
+ * Module Name:
+ *
+ *              port.c
+ *
+ * Abstract:
+ *
+ *              This module implements various port object hooking routines.
+ *
+ * Author:
+ *
+ *              Eugene Tsyrklevich 25-Mar-2004
+ *
+ * Revision History:
+ *
+ *              None.
+ */
+
+
+#include "port.h"
+
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text (INIT, InitPortHooks)
+#endif
+
+
+fpZwCreatePort                  OriginalNtCreatePort = NULL;
+fpZwCreateWaitablePort  OriginalNtCreateWaitablePort = NULL;
+
+fpZwConnectPort                 OriginalNtConnectPort = NULL;
+fpZwSecureConnectPort   OriginalNtSecureConnectPort = NULL;
+
+
+/*
+ * HookedNtCreatePort()
+ *
+ * Description:
+ *              This function mediates the NtCreatePort() system service and checks the
+ *              provided port name against the global and current process security policies.
+ *
+ *              NOTE: ZwCreatePort creates a port object. [NAR]
+ *
+ * Parameters:
+ *              Those of NtCreatePort().
+ *
+ * Returns:
+ *              STATUS_ACCESS_DENIED if the call does not pass the security policy check.
+ *              Otherwise, NTSTATUS returned by NtCreatePort().
+ */
+
+NTSTATUS
+NTAPI
+HookedNtCreatePort
+(
+        OUT PHANDLE PortHandle,
+        IN POBJECT_ATTRIBUTES ObjectAttributes,
+        IN ULONG MaxDataSize,
+        IN ULONG MaxMessageSize,
+        IN ULONG Reserved
+)
+{
+        PCHAR   FunctionName = "HookedNtCreatePort";
+
+
+        HOOK_ROUTINE_START_OPTYPE(PORT, OP_PORT_CREATE);
+
+
+        ASSERT(OriginalNtCreatePort);
+
+        rc = OriginalNtCreatePort(PortHandle, ObjectAttributes, MaxDataSize, MaxMessageSize, Reserved);
+
+
+        HOOK_ROUTINE_FINISH_OPTYPE(PORT, OP_PORT_CREATE);
+}
+
+
+
+/*
+ * HookedNtCreateWaitablePort()
+ *
+ * Description:
+ *              This function mediates the NtCreateWaitablePort() system service and checks the
+ *              provided port name against the global and current process security policies.
+ *
+ *              NOTE: ZwCreateWaitablePort creates a waitable port object. [NAR]
+ *
+ * Parameters:
+ *              Those of NtCreateWaitablePort().
+ *
+ * Returns:
+ *              STATUS_ACCESS_DENIED if the call does not pass the security policy check.
+ *              Otherwise, NTSTATUS returned by NtCreateWaitablePort().
+ */
+
+NTSTATUS
+NTAPI
+HookedNtCreateWaitablePort
+(
+        OUT PHANDLE PortHandle,
+        IN POBJECT_ATTRIBUTES ObjectAttributes,
+        IN ULONG MaxDataSize,
+        IN ULONG MaxMessageSize,
+        IN ULONG Reserved
+)
+{
+        PCHAR   FunctionName = "HookedNtCreateWaitablePort";
+
+
+        HOOK_ROUTINE_START_OPTYPE(PORT, OP_PORT_CREATE);
+
+
+        ASSERT(OriginalNtCreateWaitablePort);
+
+        rc = OriginalNtCreateWaitablePort(PortHandle, ObjectAttributes, MaxDataSize, MaxMessageSize, Reserved);
+
+
+        HOOK_ROUTINE_FINISH_OPTYPE(PORT, OP_PORT_CREATE);
+}
+
+
+
+/*
+ * HookedNtConnectPort()
+ *
+ * Description:
+ *              This function mediates the NtConnectPort() system service and checks the
+ *              provided port name against the global and current process security policies.
+ *
+ *              NOTE: ZwConnectPort creates a port connected to a named port. [NAR]
+ *
+ * Parameters:
+ *              Those of NtConnectPort().
+ *
+ * Returns:
+ *              STATUS_ACCESS_DENIED if the call does not pass the security policy check.
+ *              Otherwise, NTSTATUS returned by NtConnectPort().
+ */
+
+NTSTATUS
+NTAPI
+HookedNtConnectPort
+(
+        OUT PHANDLE PortHandle,
+        IN PUNICODE_STRING PortName,
+        IN PSECURITY_QUALITY_OF_SERVICE SecurityQos,
+        IN OUT PPORT_SECTION_WRITE WriteSection OPTIONAL,
+        IN OUT PPORT_SECTION_READ ReadSection OPTIONAL,
+        OUT PULONG MaxMessageSize OPTIONAL,
+        IN OUT PVOID ConnectData OPTIONAL,
+        IN OUT PULONG ConnectDataLength OPTIONAL
+)
+{
+        PCHAR                   FunctionName = "HookedNtConnectPort";
+        UNICODE_STRING  usInputPortName;
+        CHAR                    PORTNAME[MAX_PATH];
+        ANSI_STRING             asPortName;
+
+
+        HOOK_ROUTINE_ENTER();
+
+
+        if (!VerifyUnicodeString(PortName, &usInputPortName))
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("HookedNtConnectPort: VerifyUnicodeString failed\n"));
+                HOOK_ROUTINE_EXIT( STATUS_ACCESS_DENIED );
+        }
+
+
+        if (_snprintf(PORTNAME, MAX_PATH, "%S", usInputPortName.Buffer) < 0)
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("%s: Port name '%S' is too long\n", FunctionName, usInputPortName.Buffer));
+                HOOK_ROUTINE_EXIT( STATUS_ACCESS_DENIED );
+        }
+
+
+        if (LearningMode == FALSE)
+        {
+                POLICY_CHECK_OPTYPE_NAME(PORT, OP_PORT_CONNECT);
+        }
+
+
+        ASSERT(OriginalNtConnectPort);
+
+        rc = OriginalNtConnectPort(PortHandle, PortName, SecurityQos, WriteSection, ReadSection, MaxMessageSize,
+                                                                ConnectData, ConnectDataLength);
+
+
+        HOOK_ROUTINE_FINISH_OBJECTNAME_OPTYPE(PORT, PORTNAME, OP_PORT_CONNECT);
+}
+
+
+
+/*
+ * HookedNtSecureConnectPort()
+ *
+ * Description:
+ *              This function mediates the NtSecureConnectPort() system service and checks the
+ *              provided port name against the global and current process security policies.
+ *
+ *              NOTE: ZwSecureConnectPort creates a port connected to a named port. [NAR]
+ *
+ * Parameters:
+ *              Those of NtSecureConnectPort().
+ *
+ * Returns:
+ *              STATUS_ACCESS_DENIED if the call does not pass the security policy check.
+ *              Otherwise, NTSTATUS returned by NtSecureConnectPort().
+ */
+
+NTSTATUS
+NTAPI
+HookedNtSecureConnectPort
+(
+        OUT PHANDLE PortHandle,
+        IN PUNICODE_STRING PortName,
+        IN PSECURITY_QUALITY_OF_SERVICE SecurityQos,
+        IN OUT PPORT_SECTION_WRITE WriteSection OPTIONAL,
+        IN PSID ServerSid OPTIONAL,
+        IN OUT PPORT_SECTION_READ ReadSection OPTIONAL,
+        OUT PULONG MaxMessageSize OPTIONAL,
+        IN OUT PVOID ConnectData OPTIONAL,
+        IN OUT PULONG ConnectDataLength OPTIONAL
+)
+{
+        PCHAR                   FunctionName = "HookedNtSecureConnectPort";
+        UNICODE_STRING  usInputPortName;
+        CHAR                    PORTNAME[MAX_PATH];
+        ANSI_STRING             asPortName;
+
+
+        HOOK_ROUTINE_ENTER();
+
+
+        if (!VerifyUnicodeString(PortName, &usInputPortName))
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("HookedNtSecureConnectPort: VerifyUnicodeString failed\n"));
+                HOOK_ROUTINE_EXIT( STATUS_ACCESS_DENIED );
+        }
+
+
+        asPortName.Length = 0;
+        asPortName.MaximumLength = MAX_PATH - 1;
+        asPortName.Buffer = PORTNAME;
+
+        if (! NT_SUCCESS(RtlUnicodeStringToAnsiString(&asPortName, &usInputPortName, FALSE)))
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("HookedNtSecureConnectPort: RtlUnicodeStringToAnsiString failed\n"));
+                HOOK_ROUTINE_EXIT( STATUS_ACCESS_DENIED );
+        }
+
+        PORTNAME[asPortName.Length] = 0;
+
+
+        if (LearningMode == FALSE)
+        {
+                POLICY_CHECK_OPTYPE_NAME(PORT, OP_PORT_CONNECT);
+        }
+
+
+        ASSERT(OriginalNtSecureConnectPort);
+
+        rc = OriginalNtSecureConnectPort(PortHandle, PortName, SecurityQos, WriteSection, ServerSid, ReadSection,
+                                                                MaxMessageSize, ConnectData, ConnectDataLength);
+
+
+        HOOK_ROUTINE_FINISH_OBJECTNAME_OPTYPE(PORT, PORTNAME, OP_PORT_CONNECT);
+}
+
+
+
+/*
+ * InitPortHooks()
+ *
+ * Description:
+ *              Initializes all the mediated port operation pointers. The "OriginalFunction" pointers
+ *              are initialized by InstallSyscallsHooks() that must be called prior to this function.
+ *
+ *              NOTE: Called once during driver initialization (DriverEntry()).
+ *
+ * Parameters:
+ *              None.
+ *
+ * Returns:
+ *              TRUE to indicate success, FALSE if failed.
+ */
+
+BOOLEAN
+InitPortHooks()
+{
+        if ( (OriginalNtCreatePort = (fpZwCreatePort) ZwCalls[ZW_CREATE_PORT_INDEX].OriginalFunction) == NULL)
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("InitPortHooks: OriginalNtCreatePort is NULL\n"));
+                return FALSE;
+        }
+
+        if ( (OriginalNtCreateWaitablePort = (fpZwCreateWaitablePort) ZwCalls[ZW_CREATE_WAITPORT_INDEX].OriginalFunction) == NULL)
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("InitPortHooks: OriginalNtCreateWaitablePort is NULL\n"));
+                return FALSE;
+        }
+
+        if ( (OriginalNtConnectPort = (fpZwConnectPort) ZwCalls[ZW_CONNECT_PORT_INDEX].OriginalFunction) == NULL)
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("InitPortHooks: OriginalNtConnectPort is NULL\n"));
+                return FALSE;
+        }
+
+        if ( (OriginalNtSecureConnectPort = (fpZwSecureConnectPort) ZwCalls[ZW_SECURECONNECT_PORT_INDEX].OriginalFunction) == NULL)
+        {
+                LOG(LOG_SS_PORT, LOG_PRIORITY_DEBUG, ("InitPortHooks: OriginalNtSecureConnectPort is NULL\n"));
+                return FALSE;
+        }
+
+        return TRUE;
+}