(MFC) Extract a File from a .p7m (PKCS7 Signed-Data)

MFC example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

FreeBSD C++ Libraries

HP-UX C++ Libraries

BlackBerry QNX C++ Libraries

// Needs #include <CkCrypt2.h>

    CkString strOut;

    CkCrypt2 crypt;

    //  Any string argument automatically begins the 30-day trial.
    bool success;
    success = crypt.UnlockComponent("30-day trial");
    if (success != true) {
        strOut.append(crypt.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    const char * outFile;
    outFile = "/Users/chilkat/testData/pdf/sample.pdf";
    const char * inFile;
    inFile = "/Users/chilkat/testData/p7m/sample.pdf.p7m";

    //  Verify and restore the original file:
    success = crypt.VerifyP7M(inFile,outFile);
    if (success == false) {
        strOut.append(crypt.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Success!\r\n");

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());