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(MFC) Iterate Keys and Certs in PEM

Demonstrates how to access each of the private keys and certs contained within a PEM.

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkGlobal.h>
#include <CkPem.h>
#include <CkPrivateKey.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
    // by calling UnlockBundle.  It requires a Bundle unlock code.
    CkGlobal chilkatGlob;
    bool success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
    if (success != true) {
        strOut.append(chilkatGlob.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The Chilkat PEM class was introduced in v9.5.0.49.  
    // It requires the bundle to be unlocked, as shown above.
    CkPem pem;

    // Load the PEM from a file.
    // If the PEM is encrypted, provide a password.  Otherwise pass an empty string for the password.
    const char *password = "myPassword";
    success = pem.LoadPemFile("../myPemFiles/myPem.pem",password);
    if (success != true) {
        strOut.append(pem.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Note: If the app already has the PEM pre-loaded in a string variable, then load it 
    // by calling LoadPem instead.  
    const char *pemContent = "... the PEM contents ...";
    success = pem.LoadPem(pemContent,password);
    // Check for success as before..

    // Iterate over the private keys.
    int numPrivateKeys = pem.get_NumPrivateKeys();
    int i = 0;

    while (i < numPrivateKeys) {

        CkPrivateKey *privKey = pem.GetPrivateKey(i);
        strOut.append("Private Key ");
        strOut.appendInt(i);
        strOut.append(" is ");
        strOut.appendInt(privKey->get_BitLength());
        strOut.append(" in length");
        strOut.append("\r\n");
        delete privKey;

        i = i + 1;
    }

    // Iterate over the certificates.
    int numCerts = pem.get_NumCerts();
    i = 0;

    while (i < numCerts) {

        CkCert *cert = pem.GetCert(i);
        strOut.append("Certificate ");
        strOut.appendInt(i);
        strOut.append(" : ");
        strOut.append(cert->subjectDN());
        strOut.append("\r\n");
        delete cert;

        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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