(C) Get Base64 Public Key from Private Key

Demonstrates how to get the public key in base64 format from a private key.

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

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <C_CkBinData.h>
#include <C_CkPrivateKey.h>
#include <C_CkPublicKey.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkBinData bd;
    HCkPrivateKey privKey;
    HCkPublicKey pubKey;
    const char *pubKeyBase64;

    success = FALSE;

    // Load a private key from base64.
    bd = CkBinData_Create();
    success = CkBinData_AppendEncoded(bd,"MHQCA....n0Q==","base64");

    privKey = CkPrivateKey_Create();
    success = CkPrivateKey_LoadAnyFormat(privKey,bd,"");
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkBinData_Dispose(bd);
        CkPrivateKey_Dispose(privKey);
        return;
    }

    pubKey = CkPublicKey_Create();
    CkPrivateKey_ToPublicKey(privKey,pubKey);

    pubKeyBase64 = CkPublicKey_getEncoded(pubKey,TRUE,"base64");
    printf("%s\n",pubKeyBase64);


    CkBinData_Dispose(bd);
    CkPrivateKey_Dispose(privKey);
    CkPublicKey_Dispose(pubKey);

    }