Export Digital Certificate's Public Key

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.

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

#include <C_CkCert.h>
#include <C_CkPublicKey.h>

void ChilkatSample(void)
    {
    HCkCert cert;
    BOOL success;
    HCkPublicKey pubkey;

    cert = CkCert_Create();

    //  LoadFromFile will load virtually any certificate format file.
    //  It will auto-recognize the format and load appropiately.
    success = CkCert_LoadFromFile(cert,"/Users/chilkat/testData/cer/chilkat.cer");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        return;
    }

    //  Get the public key:

    pubkey = CkCert_ExportPublicKey(cert);
    if (pubkey == 0 ) {
        printf("%s\n",CkCert_lastErrorText(cert));
        return;
    }

    //  Save to various formats:
    success = CkPublicKey_SaveOpenSslDerFile(pubkey,"/Users/chilkat/testData/pubkeys/chilkat_openSsl.der");
    if (success != TRUE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubkey));
        CkPublicKey_Dispose(pubkey);
        return;
    }

    success = CkPublicKey_SaveOpenSslPemFile(pubkey,"/Users/chilkat/testData/pubkeys/chilkat_openSsl.pem");
    if (success != TRUE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubkey));
        CkPublicKey_Dispose(pubkey);
        return;
    }

    success = CkPublicKey_SaveRsaDerFile(pubkey,"/Users/chilkat/testData/pubkeys/chilkat_rsa.der");
    if (success != TRUE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubkey));
        CkPublicKey_Dispose(pubkey);
        return;
    }

    success = CkPublicKey_SaveXmlFile(pubkey,"/Users/chilkat/testData/pubkeys/chilkat.xml");
    if (success != TRUE) {
        printf("%s\n",CkPublicKey_lastErrorText(pubkey));
        CkPublicKey_Dispose(pubkey);
        return;
    }

    CkPublicKey_Dispose(pubkey);
    printf("Public key exported to all file formats.\n");


    CkCert_Dispose(cert);

    }