RSA 2048 Key 생성

RSA 2048 Private / Public Key 생성 코드

#include <Windows.h> #include <tchar.h> #include <wincrypt.h> int _tmain(int argc, TCHAR* argv[]) { BYTE* pPublicRSADATA = NULL; BYTE* pPrivateRSADATA = NULL; HCRYPTPROV hCryptProv = NULL; HCRYPTKEY hKey = NULL; BOOL bResult = FALSE; DWORD dwDataLen; if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0)) { _tprintf(TEXT("[-]CryptAcquireContext Error Code : %x\n"), GetLastError()); goto _EXIT; } // RSA 2048 if (!CryptGenKey(hCryptProv, CALG_RSA_KEYX, 0x08000000 | CRYPT_EXPORTABLE, &hKey)) { _tprintf(TEXT("[-]CryptGenKey Error Code : %x\n"), GetLastError()); goto _EXIT; } if (!CryptExportKey( hKey, NULL, PUBLICKEYBLOB, 0, NULL, &dwDataLen)) { _tprintf(TEXT("[-]CryptExportKey Error Code : %x\n"), GetLastError()); goto _EXIT; } pPublicRSADATA = (BYTE*)malloc(dwDataLen); if (!CryptExportKey( hKey, NULL, PUBLICKEYBLOB, 0, pPublicRSADATA, &dwDataLen)) { _tprintf(TEXT("[-]CryptExportKey Error Code : %x\n"), GetLastError()); goto _EXIT; } dwDataLen = 0; if (!CryptExportKey( hKey, NULL, PRIVATEKEYBLOB, 0, NULL, &dwDataLen)) { _tprintf(TEXT("[-]CryptExportKey Error Code : %x\n"), GetLastError()); goto _EXIT; } pPrivateRSADATA = (BYTE*)malloc(dwDataLen); if (!CryptExportKey( hKey, NULL, PRIVATEKEYBLOB, 0, pPrivateRSADATA, &dwDataLen)) { _tprintf(TEXT("[-]CryptExportKey Error Code : %x\n"), GetLastError()); goto _EXIT; } _EXIT: if(hKey) CryptDestroyKey(hKey); if (hCryptProv) CryptReleaseContext(hCryptProv, 0); if (pPublicRSADATA) free(pPublicRSADATA); if (pPrivateRSADATA) free(pPrivateRSADATA); return 0; }