(C++) RSA OAEP Padding

Demonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkRsa.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;

    // RSA public key in XML format:
    const char *pubKeyXml = "<RSAPublicKey><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAPublicKey>";

    CkPublicKey pubKey;
    success = pubKey.LoadFromString(pubKeyXml);
    if (success == false) {
        std::cout << pubKey.lastErrorText() << "\r\n";
        return;
    }

    success = rsa.UsePublicKey(pubKey);
    if (success == false) {
        std::cout << rsa.lastErrorText() << "\r\n";
        return;
    }

    // To use Optimal Asymmetric Encryption Padding (OAEP) padding,
    // simply set the PkcsPadding property to false
    rsa.put_PkcsPadding(false);

    // Encrypt a string and return the encrypted data base64-encoded:
    rsa.put_EncodingMode("base64");

    const char *plainText = "RSA Encryption should be easy.";

    bool usePrivateKey = false;
    const char *encryptedStr = rsa.encryptStringENC(plainText,usePrivateKey);
    std::cout << encryptedStr << "\r\n";
    }