C++

Generate an RSA Key and Get as Base64 DER

See more RSA Examples

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER. C++

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

void ChilkatSample(void)
    {
    bool success = false;

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

    CkRsa rsa;

    // Generate a 2048-bit key.
    CkPrivateKey privKey;
    success = rsa.GenKey(2048,privKey);
    if (success == false) {
        std::cout << rsa.lastErrorText() << "\r\n";
        return;
    }

    // Get the public part of the key.
    CkPublicKey pubKey;
    privKey.ToPublicKey(pubKey);

    // There are two possible formats for representing the RSA public key 
    // in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
    // We can get either by setting bChoosePkcs1 to true or false.
    bool bChoosePkcs1 = true;
    const char *pubKeyBase64Der = pubKey.getEncoded(bChoosePkcs1,"base64");
    std::cout << "Public Key Base64 DER:" << "\r\n";
    std::cout << pubKeyBase64Der << "\r\n";

    // Get the private key as Base64 DER:
    // We can get PKCS1 or PKCS8, but with different methods:
    const char *privKeyPkcs1 = privKey.getPkcs1ENC("base64");
    std::cout << "Private Key PKCS1 Base64 DER:" << "\r\n";
    std::cout << privKeyPkcs1 << "\r\n";

    const char *privKeyPkcs8 = privKey.getPkcs8ENC("base64");
    std::cout << "Private Key PKCS8 Base64 DER:" << "\r\n";
    std::cout << privKeyPkcs8 << "\r\n";
    }