Function base64_encode

libcppcryptfs/util/util.cpp:295–347

const char *
base64_encode(const BYTE *data, DWORD datalen, string& storage, bool urlTransform, bool padding)
{

	if (!urlTransform) {
		_ASSERT(padding);
	}

	if (!data || datalen < 1)
		return NULL;

	int base64len = (int)datalen*2;

	char *base64str = NULL;

	BOOL bResult = FALSE;

	TempBuffer<char, 4096> base64(base64len + 1);

	if (base64str = base64.get()) {		

		// ATL Base64Encode() is supposedly way faster than CryptBinaryToString()
	
		bResult = Base64Encode(data, (int)datalen, base64str, &base64len, ATL_BASE64_FLAG_NOCRLF);

		// ATL Base64Encode() doesn't null terminate the string
		if (bResult)
			base64str[base64len] = '\0';

	} else {
		bResult = FALSE;
	}
	if (bResult) {

		if (urlTransform) {
			size_t len = strlen(base64str);
			size_t i;
			for (i = 0; i < len; i++) {
				if (base64str[i] == '+')
					base64str[i] = '-';
				else if (base64str[i] == '/')
					base64str[i] = '_';
			}
		}
		storage = base64str;
		
		if (!padding)
			remove_base64_padding(storage);
		return storage.c_str();
	} else {		
		return NULL;
	}
}

const WCHAR *
base64_encode(const BYTE *data, DWORD datalen, wstring& storage, bool urlTransform, bool padding)