Unicode C

RSA OAEP Padding

See more RSA Examples

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

#include <C_CkRsaW.h>
#include <C_CkPublicKeyW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRsaW rsa;
    const wchar_t *pubKeyXml;
    HCkPublicKeyW pubKey;
    const wchar_t *plainText;
    BOOL usePrivateKey;
    const wchar_t *encryptedStr;

    success = FALSE;

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

    rsa = CkRsaW_Create();

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

    pubKey = CkPublicKeyW_Create();
    success = CkPublicKeyW_LoadFromString(pubKey,pubKeyXml);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPublicKeyW_lastErrorText(pubKey));
        CkRsaW_Dispose(rsa);
        CkPublicKeyW_Dispose(pubKey);
        return;
    }

    success = CkRsaW_UsePublicKey(rsa,pubKey);
    if (success == FALSE) {
        wprintf(L"%s\n",CkRsaW_lastErrorText(rsa));
        CkRsaW_Dispose(rsa);
        CkPublicKeyW_Dispose(pubKey);
        return;
    }

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

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

    plainText = L"RSA Encryption should be easy.";

    usePrivateKey = FALSE;
    encryptedStr = CkRsaW_encryptStringENC(rsa,plainText,usePrivateKey);
    wprintf(L"%s\n",encryptedStr);


    CkRsaW_Dispose(rsa);
    CkPublicKeyW_Dispose(pubKey);

    }