110 lines
2.6 KiB
C++
110 lines
2.6 KiB
C++
#include <Windows.h>
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#include <iostream>
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#define DLL_EXPORTS
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#include "api.h"
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//#define SHOW_MSGBOX
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inline DWORD rotl32a(DWORD x, DWORD n)
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{
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return (x << n) | (x >> (32 - n));
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}
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inline char to_lower(char c)
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{
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if (c >= 'A' && c <= 'Z') {
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c = c - 'A' + 'a';
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}
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return c;
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}
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DWORD calc_checksum(BYTE *str, size_t buf_size, bool enable_tolower)
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{
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if (str == NULL) return 0;
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DWORD checksum = 0;
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for (size_t i = 0; i < buf_size; i++) {
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checksum = rotl32a(checksum, 7);
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char c = str[i];
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if (enable_tolower) {
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c = to_lower(c);
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}
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checksum ^= c;
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}
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return checksum;
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}
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int DLL_API test_checksum1()
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{
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char test1[] = "this is a test!";
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DWORD checks = calc_checksum((BYTE*)test1, strlen(test1), true);
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std::cout << "Checks 1: " << std::hex << checks << std::endl;
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return checks;
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}
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int DLL_API test_checksum2()
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{
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wchar_t teststr[] = L"Checking wide strings";
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DWORD checks = calc_checksum((BYTE*)teststr, sizeof(teststr), true);
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#ifdef SHOW_MSGBOX
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MessageBoxW(NULL, teststr, L"Test Case 5", MB_OK);
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#endif
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std::cout << "Checks 2: " << std::hex << checks << std::endl;
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return checks;
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}
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int DLL_API test_checksum4()
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{
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wchar_t teststr[] = L"Test checksum 4";
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DWORD checks = calc_checksum((BYTE*)teststr, sizeof(teststr), true);
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#ifdef SHOW_MSGBOX
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MessageBoxW(NULL, teststr, L"Test Case 5", MB_OK);
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#endif
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std::cout << "Checks 4: " << std::hex << checks << std::endl;
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return checks;
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}
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int DLL_API test_checksum5()
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{
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wchar_t teststr[] = L"Yet another checksum test: 5";
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DWORD checks = calc_checksum((BYTE*)teststr, sizeof(teststr), true);
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#ifdef SHOW_MSGBOX
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MessageBoxW(NULL, teststr, L"Test Case 5", MB_OK);
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#endif
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std::cout << "Checks 5: " << std::hex << checks << std::endl;
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return checks;
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}
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int DLL_API test_checksum3()
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{
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SYSTEMTIME SystemTime;
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GetSystemTime(&SystemTime);
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TCHAR pszDate[200];
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GetDateFormatA(LOCALE_USER_DEFAULT, DATE_LONGDATE, &SystemTime, NULL, pszDate, 200);
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wchar_t teststr[] = L"Time func checksum";
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DWORD checks = calc_checksum((BYTE*)teststr, sizeof(teststr), true);
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std::cout << "Checks 3: " << std::hex << checks << std::endl;
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#ifdef SHOW_MSGBOX
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MessageBoxA(NULL, pszDate, "Test Case 5", MB_OK);
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#endif
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return checks;
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}
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BOOL WINAPI DllMain(HANDLE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
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{
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switch (fdwReason)
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{
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case DLL_PROCESS_ATTACH:
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printf("Test Case 5 DLL loaded\n");
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break;
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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case DLL_PROCESS_DETACH:
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break;
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}
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return TRUE;
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}
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