(MFC) Generate RSA Public/Private Key Pair and Export to PEM

MFC example code showing how to generate an RSA public/private key pair and export to PEM files.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkRsa.h>
#include <CkPrivateKey.h>
#include <CkPublicKey.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRsa rsa;

    // Generate a 1024-bit key.  Chilkat RSA supports
    // key sizes ranging from 512 bits to 4096 bits.
    bool success = rsa.GenerateKey(1024);
    if (success != true) {
        strOut.append(rsa.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Keys are exported in XML format:
    const char *publicKeyXml = rsa.exportPublicKey();
    strOut.append(publicKeyXml);
    strOut.append("\r\n");

    const char *privateKeyXml = rsa.exportPrivateKey();
    strOut.append(privateKeyXml);
    strOut.append("\r\n");

    // Save the private key in PEM format:
    CkPrivateKey privKey;
    success = privKey.LoadXml(privateKeyXml);
    success = privKey.SaveRsaPemFile("privateKey.pem");

    // Save the public key in PEM format:
    CkPublicKey pubKey;
    success = pubKey.LoadXml(publicKeyXml);
    success = pubKey.SaveOpenSslPemFile("publicKey.pem");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }