VC/MFC 获取文件MD5值 获取大文件MD5值 命令行版完整项目(源代码)

/* 功能: Windows 系统获取大文件MD5值 编译环境: VS2017，字符集可随意切换 基于官方API示例封装 */ #include <iostream> #include <windows.h> #include <wincrypt.h> #include <tchar.h> #define BUFSIZE 1024 #define MD5LEN 16 // 功能: 获取文件MD5值 // TCHAR* tchFile 要获取MD5值的文件绝对路径, 例如: C:\\a.txt // TCHAR* tchMd5 保存MD5值 DWORD GetFileMD5(TCHAR* tchFile, TCHAR* tchMd5); int _tmain(int argc, TCHAR **argv) { #ifdef UNICODE setlocale(LC_ALL, "zh_CN.UTF-8"); #endif if (argc != 2) { _tprintf(_T("参数错误, 参数一为文件绝对路径，例如: c:\\a.txt \n")); return -1; } // 测试视频文件大小超过 5GB //TCHAR tchFile[] = _T("z:\\20220117_201714.mp4"); TCHAR tchMd5[33]{ 0 }; DWORD dwStatus = GetFileMD5(argv[1], tchMd5); _tprintf(_T("MD5 hash of file %s is: %s\n"), argv[1], tchMd5); return 0; } DWORD GetFileMD5(TCHAR* tchFile, TCHAR* tchMd5) { DWORD dwStatus = 0; BOOL bResult = FALSE; HCRYPTPROV hProv = 0; HCRYPTHASH hHash = 0; HANDLE hFile = NULL; BYTE rgbFile[BUFSIZE]; DWORD cbRead = 0; BYTE rgbHash[MD5LEN]; DWORD cbHash = 0; constexpr CHAR rgbDigits[] = "0123456789abcdef"; // Logic to check usage goes here. do { hFile = CreateFile(tchFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL); if (INVALID_HANDLE_VALUE == hFile) { dwStatus = GetLastError(); _tprintf(_T("Error opening file %s\nError: %d\n"), tchFile, dwStatus); break; } // Get handle to the crypto provider if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) { dwStatus = GetLastError(); _tprintf(_T("CryptAcquireContext failed: %d\n"), dwStatus); break; } if (!CryptCreateHash(hProv, CALG_MD5, 0, 0, &hHash)) { dwStatus = GetLastError(); _tprintf(_T("CryptAcquireContext failed: %d\n"), dwStatus); break; } while (bResult = ReadFile(hFile, rgbFile, BUFSIZE, &cbRead, NULL)) { if (0 == cbRead) break; if (!CryptHashData(hHash, rgbFile, cbRead, 0)) { dwStatus = GetLastError(); _tprintf(_T("CryptHashData failed: %d\n"), dwStatus); break; } } if (!bResult) { dwStatus = GetLastError(); _tprintf(_T("ReadFile failed: %d\n"), dwStatus); break; } cbHash = MD5LEN; if (CryptGetHashParam(hHash, HP_HASHVAL, rgbHash, &cbHash, 0)) { char chMd5[33]{ 0 }; for (DWORD i = 0; i < cbHash; i++) { CHAR tmp[3]{ 0 }; sprintf_s(tmp, "%c%c", rgbDigits[rgbHash[i] >> 4], rgbDigits[rgbHash[i] & 0xf]); for (auto &i : tmp) { // 将小写字母转为大写 if (i >= 0x61 && i <= 0x7A) { i ^= (1 << 5); } } #ifdef _UNICODE strcat_s(chMd5, 33, tmp); #else strcat_s(tchMd5, 33, tmp); #endif } #ifdef _UNICODE MultiByteToWideChar(CP_ACP, 0, chMd5, 32, tchMd5, 32); #endif } else { dwStatus = GetLastError(); _tprintf(_T("CryptGetHashParam failed: %d\n"), dwStatus); } } while (0); CryptDestroyHash(hHash); CryptReleaseContext(hProv, 0); CloseHandle(hFile); return dwStatus; }