(Unicode C) AES Encrypt String (utf-8 byte representation) and return Base64

Demonstrates how to AES encrypt the utf-8 byte representation of a string and return in base64 format.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <C_CkCrypt2W.h>

void ChilkatSample(void)
    {
    HCkCrypt2W crypt;
    const wchar_t *ivHex;
    const wchar_t *keyHex;
    const wchar_t *encryptedStr;
    const wchar_t *urlEncoded;
    const wchar_t *encBase64Url;
    const wchar_t *encBase64;
    const wchar_t *originalStr;

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

    crypt = CkCrypt2W_Create();

    CkCrypt2W_putCryptAlgorithm(crypt,L"aes");
    CkCrypt2W_putCipherMode(crypt,L"cbc");
    CkCrypt2W_putKeyLength(crypt,256);
    CkCrypt2W_putCharset(crypt,L"utf-8");
    CkCrypt2W_putEncodingMode(crypt,L"base64");

    ivHex = L"000102030405060708090A0B0C0D0E0F";
    CkCrypt2W_SetEncodedIV(crypt,ivHex,L"hex");
    keyHex = L"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F";
    CkCrypt2W_SetEncodedKey(crypt,keyHex,L"hex");

    encryptedStr = CkCrypt2W_encryptStringENC(crypt,L"This is the original string");
    wprintf(L"%s\n",encryptedStr);

    // Let's say we want to URL encode the base64 string..
    CkCrypt2W_putCryptAlgorithm(crypt,L"none");
    CkCrypt2W_putEncodingMode(crypt,L"url");
    urlEncoded = CkCrypt2W_encryptStringENC(crypt,encryptedStr);
    wprintf(L"%s\n",urlEncoded);

    // Sample output:

    //  q3fmgEqjqa9o//ZS6aPuh4Wtbrrxx/WOIQSKeVnesZg=
    //  q3fmgEqjqa9o%2F%2FZS6aPuh4Wtbrrxx%2FWOIQSKeVnesZg%3D

    // -------------------------------------------------------------------
    // Now let's do the reverse...
    // 

    // We start with a string that is the binary encrypted data, base64 encoded, and then URL encoded.
    encBase64Url = L"q3fmgEqjqa9o%2F%2FZS6aPuh4Wtbrrxx%2FWOIQSKeVnesZg%3D";

    // We'll use the same crypt object.  If using a new instance of the crypt object,
    // make sure *all* settings are identical:  the algorithm, cipher mode, key length, charset, encoding mode, IV, and secret key.

    // Decode from URL...
    CkCrypt2W_putCryptAlgorithm(crypt,L"none");
    CkCrypt2W_putEncodingMode(crypt,L"url");
    encBase64 = CkCrypt2W_decryptStringENC(crypt,urlEncoded);
    wprintf(L"%s\n",encBase64);

    // Now decrypt...
    CkCrypt2W_putCryptAlgorithm(crypt,L"aes");
    CkCrypt2W_putEncodingMode(crypt,L"base64");
    originalStr = CkCrypt2W_decryptStringENC(crypt,encBase64);
    wprintf(L"%s\n",originalStr);


    CkCrypt2W_Dispose(crypt);

    }