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I thought I should give you a sample program. SecureZeroMemory(pEncryptedBuffer, dwDataLen) īres = CryptEncrypt(hKey, NULL, fLastBlock ? 1 : 0, 0, pEncryptedBuffer, &dwSize, dwDataLen) įwrite(pEncryptedBuffer, 1, dwSize, encryptedFile) PEncryptedBuffer = (BYTE*)malloc(dwDataLen) Size_t stLen = fread(buffer, 1, 4096, fileToEncrypt) ĬryptEncrypt(hKey, NULL, 0, 0, NULL, &dwDataLen, 0) Void CCodeDecodeCPlus2Dlg::OnBnClickedCode()įILE *fileToEncrypt = NULL, *encryptedFile = NULL Ĭonst char *lpszFileName = "\\Storage Card\\filetoencrypt.txt" Ĭonst char *lpszDstFile = " \\Storage Card\\encryptedfile.txt" įileToEncrypt = fopen(lpszFileName, "r" ) ĮncryptedFile = fopen(lpszDstFile, "wb" ) īres = CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, 0) īres = CryptCreateHash(hProv, CALG_MD5, 0, 0, &hHash) īres = CryptHashData(hHash, (BYTE*)lpszPassword, nLen, 0) īres = CryptDeriveKey(hProv, CALG_RC4, hHash, 0, &hKey) with the ENM_CHANGE flag ORed into the mask. function and call CRichEditCtrl().SetEventMask() send this notification unless you override the CDialog::OnInitDialog() TODO: If this is a RICHEDIT control, the control will not Void CCodeDecodeCPlus2Dlg::OnEnChangeEdit1() Void CCodeDecodeCPlus2Dlg::OnBnClickedDecode() Int CCodeDecodeCPlus2Dlg::RC4DecryptFile( unsigned char *fname, unsigned char *passwd, unsigned long pwlen) Tf=fopen( "/Storage Card/file.enc", "wb" ) ĬryptAcquireContext(&hProv,NULL,MS_STRONG_PROV,PROV_RSA_FULL,0) ĬryptCreateHash(hProv,CALG_MD5,0,0,&hHash) ĬryptDeriveKey(hProv,CALG_RC4,hHash,0,&hKey) ĬryptEncrypt(hKey,NULL,0,0,buf,&sz,4096) ĬryptEncrypt(hKey,NULL,1,0,buf,&sz,4096) Int CCodeDecodeCPlus2Dlg::RC4EncryptFile( unsigned char *fname, unsigned char *passwd, unsigned long pwlen) RC4DecryptFile(( unsigned char *)c,( unsigned char *)lpszPassword,( long ) nLength1) RC4EncryptFile(( unsigned char *)c,( unsigned char *)lpszPassword,( long ) nLength1) ĪppendLineToMultilineEditCtrl(m_Edit,m_MyArray) Wcstombs(lpszPassword, m_paswd.GetString(), m_paswd.GetLength())

Memset(lpszPassword, 0, m_paswd.GetLength()+1) ReadTextFile((LPCTSTR)"C:/Users/henitz/Documents/Visual Studio 2005/Projects/CodeDecoderVCDesktop3/Teste2.txt",m_MyArray) Ĭhar *lpszPassword = ( char *) malloc(m_paswd.GetLength()+1) TODO: Add your control notification handler code here Void CCodeDecodeCPlus2Dlg::OnBnClickedButton1()