Export Public Key to RSA DER, OpenSSL DER/PEM, XML

Demonstrates how to export a digital certificate's public key to RSA DER, OpenSSL PEM or DER, or to XML format.

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

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

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

    cert = CkCert_Create();

    //  Th LoadByCommonName method searches the Windows
    //  Current User Certificate Store and Local Machine Certificate
    //  Store for a certificate whose common name (CN) matches
    //  the argument:

    success = CkCert_LoadByCommonName(cert,"Chilkat Software, Inc.");
    if (success == FALSE) {
        printf("Failed to find certificate!\n");
    }
    else {

        //  Get the PublicKey object:

        pkey = CkCert_ExportPublicKey(cert);
        if (!(pkey == 0 )) {

            //  Export the public key to an RSA DER file:
            CkPublicKey_SaveRsaDerFile(pkey,"pubkey_rsa.der");

            //  Export to an OpenSSL DER file:
            CkPublicKey_SaveOpenSslDerFile(pkey,"pubkey_openssl.der");

            //  Export to an OpenSSL PEM file:
            CkPublicKey_SaveOpenSslPemFile(pkey,"pubkey_openssl.pem");

            //  Export to an XML file:
            CkPublicKey_SaveXmlFile(pkey,"pubkey.xml");

            //  Get OpenSSL PEM string:
            printf("OpenSSL PEM Public Key:\n");
            printf("%s\n",CkPublicKey_getOpenSslPem(pkey));

        }
        else {
            printf("No public key found!\n");
        }

    }

    //  The Chilkat Certificate, Certificate Store, Private Key,
    //  Public Key, and Key Container classes / objects are freeware.

    //  They are used by and included with the Chilkat Email,
    //  Crypt, S/MIME, and other commercial Chilkat components.


    CkCert_Dispose(cert);

    }