DoubleAgent/main.c

/* Includes ******************************************************************/
#include <Windows.h>
#include <stdio.h>
#include <crtdbg.h>
#include "Path.h"
#include "Verifier.h"

/* Macros ********************************************************************/
#define DOUBLEAGENT_ACTION_INSTALL (L"install")
#define DOUBLEAGENT_ACTION_REPAIR (L"repair")
#define DOUBLEAGENT_ACTION_UNINSTALL (L"uninstall")
#define DOUBLEAGENT_VERIFIER_DLL_NAME L"DoubleAgentDll.dll"
#define DOUBLEAGENT_VERIFIER_DLL_RELATIVE_PATH_X86 (L".\\x86\\" ## DOUBLEAGENT_VERIFIER_DLL_NAME)
#define DOUBLEAGENT_VERIFIER_DLL_RELATIVE_PATH_X64 (L".\\x64\\" ## DOUBLEAGENT_VERIFIER_DLL_NAME)

/* Types *********************************************************************/
typedef enum _DOUBLEAGENT_ARGUMENTS
{
    DOUBLEAGENT_ARGUMENTS_INVALID_VALUE = -1,
    DOUBLEAGENT_ARGUMENTS_SELF_PATH,
    DOUBLEAGENT_ARGUMENTS_ACTION_TYPE,
    DOUBLEAGENT_ARGUMENTS_PROCESS_NAME,

    /* Must be last */
    DOUBLEAGENT_ARGUMENTS_COUNT
} DOUBLEAGENT_ARGUMENTS, *PDOUBLEAGENT_ARGUMENTS;

/* Function Declarations *****************************************************/
/*
 * Handles the install action
 */
static DOUBLEAGENT_STATUS main_Install(IN PCWSTR *ppcwszArgv);
/*
 * Handles the repair action
 */
static DOUBLEAGENT_STATUS main_Repair(IN PCWSTR *ppcwszArgv);
/*
 * Handles the uninstall action
 */
static DOUBLEAGENT_STATUS main_Uninstall(IN PCWSTR *ppcwszArgv);

/* Function Definitions ******************************************************/
INT wmain(IN SIZE_T nArgc, IN PCWSTR *ppcwszArgv)
{
    DOUBLEAGENT_STATUS eStatus = DOUBLEAGENT_STATUS_INVALID_VALUE;

    /* Prints usage */
    if (1 == nArgc)
    {
        (VOID)wprintf(L"Usage:\tDoubleAgent.exe install\\uninstall\\repair process_name\n");
        (VOID)wprintf(L"e.g.\tDoubleAgent.exe install cmd.exe\n");
        return 0;
    }

    /* Validates the arguments */
    if (DOUBLEAGENT_ARGUMENTS_COUNT != nArgc)
    {
        DOUBLEAGENT_SET(eStatus, DOUBLEAGENT_STATUS_DOUBLEAGENT_WMAIN_INVALID_ARGS_COUNT);
        goto lbl_cleanup;
    }

    /* Install action */
    if (0 == _wcsicmp(ppcwszArgv[DOUBLEAGENT_ARGUMENTS_ACTION_TYPE], DOUBLEAGENT_ACTION_INSTALL))
    {
        eStatus = main_Install(ppcwszArgv);
        if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
        {
            goto lbl_cleanup;
        }
    }
    /* Repair action */
    else if (0 == _wcsicmp(ppcwszArgv[DOUBLEAGENT_ARGUMENTS_ACTION_TYPE], DOUBLEAGENT_ACTION_REPAIR))
    {
        eStatus = main_Repair(ppcwszArgv);
        if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
        {
            goto lbl_cleanup;
        }
    }
    /* Uninstall action */
    else if (0 == _wcsicmp(ppcwszArgv[DOUBLEAGENT_ARGUMENTS_ACTION_TYPE], DOUBLEAGENT_ACTION_UNINSTALL))
    {
        eStatus = main_Uninstall(ppcwszArgv);
        if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
        {
            goto lbl_cleanup;
        }
    }
    /* Unsupported action */
    else
    {
        DOUBLEAGENT_SET(eStatus, DOUBLEAGENT_STATUS_DOUBLEAGENT_WMAIN_UNSUPPORTED_ACTION);
        goto lbl_cleanup;
    }

    /* Succeeded */
    DOUBLEAGENT_SET(eStatus, DOUBLEAGENT_STATUS_SUCCESS);

lbl_cleanup:
    if (FALSE != DOUBLEAGENT_SUCCESS(eStatus))
    {
        (VOID)wprintf(L"Succeeded");
    }
    else
    {
        (VOID)wprintf(L"Failed (error code %lu)", eStatus);
    }
    /* Returns status */
    return eStatus;
}

static DOUBLEAGENT_STATUS main_Install(IN PCWSTR *ppcwszArgv)
{
    DOUBLEAGENT_STATUS eStatus = DOUBLEAGENT_STATUS_INVALID_VALUE;
    PWSTR pwszExeDirPath = NULL;
    PWSTR pwszVerifierDllPathX86 = NULL;
    PWSTR pwszVerifierDllPathX64 = NULL;

    /* Validates the parameters */
    _ASSERT(NULL != ppcwszArgv);

    /* Gets the executable directory */
    eStatus = PATH_GetDirectory(ppcwszArgv[DOUBLEAGENT_ARGUMENTS_SELF_PATH], &pwszExeDirPath);
    if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
    {
        goto lbl_cleanup;
    }

    /* Gets the x86 verifier dll path */
    eStatus = PATH_Combine(pwszExeDirPath, DOUBLEAGENT_VERIFIER_DLL_RELATIVE_PATH_X86, &pwszVerifierDllPathX86);
    if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
    {
        goto lbl_cleanup;
    }

    /* Gets the x64 verifier dll path */
    eStatus = PATH_Combine(pwszExeDirPath, DOUBLEAGENT_VERIFIER_DLL_RELATIVE_PATH_X64, &pwszVerifierDllPathX64);
    if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
    {
        goto lbl_cleanup;
    }

    /* Installs the application verifier for the process */
    eStatus = VERIFIER_Install(ppcwszArgv[DOUBLEAGENT_ARGUMENTS_PROCESS_NAME], DOUBLEAGENT_VERIFIER_DLL_NAME, pwszVerifierDllPathX86, pwszVerifierDllPathX64);
    if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
    {
        goto lbl_cleanup;
    }

    /* Succeeded */
    DOUBLEAGENT_SET(eStatus, DOUBLEAGENT_STATUS_SUCCESS);

lbl_cleanup:
    /* Frees the x64 verifier dll path */
    if (NULL != pwszVerifierDllPathX64)
    {
        (VOID)HeapFree(GetProcessHeap(), 0, pwszVerifierDllPathX64);
        pwszVerifierDllPathX64 = NULL;
    }

    /* Frees the x86 verifier dll path */
    if (NULL != pwszVerifierDllPathX86)
    {
        (VOID)HeapFree(GetProcessHeap(), 0, pwszVerifierDllPathX86);
        pwszVerifierDllPathX86 = NULL;
    }

    /* Frees the executable directory */
    if (NULL != pwszExeDirPath)
    {
        (VOID)HeapFree(GetProcessHeap(), 0, pwszExeDirPath);
        pwszExeDirPath = NULL;
    }

    /* Returns status */
    return eStatus;
}

static DOUBLEAGENT_STATUS main_Repair(IN PCWSTR *ppcwszArgv)
{
    UNREFERENCED_PARAMETER(ppcwszArgv);
    DOUBLEAGENT_STATUS eStatus = DOUBLEAGENT_STATUS_INVALID_VALUE;

    /* Validates the parameters */
    _ASSERT(NULL != ppcwszArgv);

    /* Repairs the machine to its original state */
    eStatus = VERIFIER_Repair();
    if (FALSE == DOUBLEAGENT_SUCCESS(eStatus))
    {
        goto lbl_cleanup;
    }

    /* Succeeded */
    DOUBLEAGENT_SET(eStatus, DOUBLEAGENT_STATUS_SUCCESS);

lbl_cleanup:
    /* Returns status */
    return eStatus;
}

static DOUBLEAGENT_STATUS main_Uninstall(IN PCWSTR *ppcwszArgv)
{
    DOUBLEAGENT_STATUS eStatus = DOUBLEAGENT_STATUS_INVALID_VALUE;

    /* Validates the parameters */
    _ASSERT(NULL != ppcwszArgv);

    /* Uninstalls the application verifier from the process */
    VERIFIER_Uninstall(ppcwszArgv[DOUBLEAGENT_ARGUMENTS_PROCESS_NAME], DOUBLEAGENT_VERIFIER_DLL_NAME);

    /* Succeeded */
    DOUBLEAGENT_SET(eStatus, DOUBLEAGENT_STATUS_SUCCESS);

    /* Returns status */
    return eStatus;
}