Re: CryptBinaryToString and CryptStringToBinary

"Carl Forsman" wrote:


I don't know why does not work. It won't even compile. For
starters, you allocate an array of bytes with the size 1 byte. I
am in doubt that this array will be sufficient to hold the result
of conversion. I tried this code and it works for me:

#include <vector>
#include <algorithm>
#include <fstream>
#include <iterator>

int _tmain(int /*argc*/, _TCHAR* /*argv*/[])
{
    LPCTSTR pszBase64 = _T("<base64 string goes here>");

    // calculate the length of the buffer needed
    //
    DWORD cbBinary = 0;
    BOOL bRet = CryptStringToBinary(
        pszBase64,
        _tcslen(pszBase64),
        CRYPT_STRING_BASE64,
        NULL,
        &cbBinary,
        NULL,
        NULL);

    if(bRet)
    {
        vector<BYTE> vecBin(cbBinary);

        // decode base64 to binary
        //
        bRet = CryptStringToBinary(
            pszBase64,
            _tcslen(pszBase64),
            CRYPT_STRING_BASE64,
            &vecBin[0],
            &cbBinary,
            NULL,
            NULL);

        if(bRet)
        {
            // save decoded data
            //
            ofstream ofsPng(_T("test.png"),
                ios_base::out | ios_base::binary);

            if(!ofsPng.bad())
            {
                copy(vecBin.begin(), vecBin.end(),
                    ostream_iterator<BYTE>(ofsPng));
            }
        }
    }

    return 0;
}