C++

Export Digital Certificate's Public Key

See more Certificates Examples

The ExportPublicKey method can be called to get a certificate's public key. It can then be saved to any of a number of formats: (1) OpenSSL DER, (2) OpenSSL PEM, (3) RSA DER, (4) XML. C++

#include <CkCert.h>
#include <CkPublicKey.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkCert cert;

    // LoadFromFile will load virtually any certificate format file.
    // It will auto-recognize the format and load appropiately.
    success = cert.LoadFromFile("/Users/chilkat/testData/cer/chilkat.cer");
    if (success == false) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    // Get the public key:
    CkPublicKey pubkey;
    cert.GetPublicKey(pubkey);

    // Save to various formats:
    success = pubkey.SaveDerFile(false,"/Users/chilkat/testData/pubkeys/chilkat_pkcs8.der");
    if (success != true) {
        std::cout << pubkey.lastErrorText() << "\r\n";
        return;
    }

    success = pubkey.SavePemFile(false,"/Users/chilkat/testData/pubkeys/chilkat.pem");
    if (success != true) {
        std::cout << pubkey.lastErrorText() << "\r\n";
        return;
    }

    success = pubkey.SaveDerFile(true,"/Users/chilkat/testData/pubkeys/chilkat_pkcs1.der");
    if (success != true) {
        std::cout << pubkey.lastErrorText() << "\r\n";
        return;
    }

    success = pubkey.SaveXmlFile("/Users/chilkat/testData/pubkeys/chilkat.xml");
    if (success != true) {
        std::cout << pubkey.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Public key exported to all file formats." << "\r\n";
    }