/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * XSEC
 *
 * XSECCryptoBase64 := Implementation of Base64 utility fns
 *
 * $Id: XSECCryptoBase64.cpp 351207 2005-02-03 12:48:16Z milan $
 *
 */

#include <xsec/framework/XSECDefs.hpp>
#include <xsec/enc/XSECCryptoBase64.hpp>
#include <xsec/framework/XSECError.hpp>

#include <xercesc/util/XMLString.hpp>

XERCES_CPP_NAMESPACE_USE

// --------------------------------------------------------------------------------
//           Clean a buffer of Base64 characters
// --------------------------------------------------------------------------------


char * XSECCryptoBase64::cleanBuffer(const char * buffer, 
									  unsigned int bufLen, 
									  unsigned int &retBufLen) {

	if (bufLen == 0)
		bufLen = XMLString::stringLen(buffer);

	char * res;

	XSECnew(res, char[bufLen + (bufLen / 72) + 3]);

	unsigned int j = 0;
	unsigned int k = 0;
	for (unsigned int i = 0; i < bufLen; ++i) {
		res[j++] = buffer[i];
		if (buffer[i] == '\n' || buffer[i] == '\r')
			k = 0;
		else {
			if (++k >= 72) {
				res[j++] = '\n';
				k = 0;
			}
		}
	}

	res[j] = '\0';
	retBufLen = j;

	return res;

}