(MFC) Load an Ed25519 Private Key from Hex

Demonstrates how to load an Ed25519 private key from raw hex bytes.

Note: This example requires Chilkat v9.5.0.83 or greater.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkPrivateKey.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkPrivateKey privKey;

    // We have the hexidecimal encoded bytes of the private key and public key:
    const char *privKeyHex = "d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842";
    const char *pubKeyHex = "19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1";

    // Load these values into the Chilkat private key object:
    bool success = privKey.LoadEd25519(privKeyHex,pubKeyHex);
    if (success == false) {
        strOut.append(privKey.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // ---------------------------------------------------------------
    // We don't actually need the public key.  If we pass an empty string for the public key,
    // Chilkat will automatically compute it.
    CkPrivateKey privKey2;
    success = privKey2.LoadEd25519(privKeyHex,"");

    // Let's get the public key to see that it computed the same value.
    CkStringBuilder sbPubKeyHex;
    privKeyHex = privKey2.getRawHex(sbPubKeyHex);
    strOut.append("computed public key = ");
    strOut.append(sbPubKeyHex.getAsString());
    strOut.append("\r\n");

    // The output should be:
    // computed public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }