RSA OAEP Padding

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

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#include <C_CkRsa.h>

void ChilkatSample(void)
    {
    HCkRsa rsa;
    BOOL success;
    const char * publicKey;
    const char * plainText;
    BOOL usePrivateKey;
    const char * encryptedStr;

    rsa = CkRsa_Create();

    success = CkRsa_UnlockComponent(rsa,"Anything for 30-day trial");
    if (success != TRUE) {
        printf("RSA component unlock failed\n");
        return;
    }

    //  RSA public key in XML format:

    publicKey = "<RSAKeyValue><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";

    CkRsa_ImportPublicKey(rsa,publicKey);

    //  To use Optimal Asymmetric Encryption Padding (OAEP) padding,
    //  simply set the OaepPadding property:
    CkRsa_putOaepPadding(rsa,TRUE);

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

    plainText = "RSA Encryption should be easy.";

    usePrivateKey = FALSE;

    encryptedStr = CkRsa_encryptStringENC(rsa,plainText,usePrivateKey);
    printf("%s\n",encryptedStr);

    CkRsa_Dispose(rsa);

    }