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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2009 Red Hat, Inc.
* All rights reserved.
*
* License: GPL (version 3 or any later version).
* See LICENSE for details.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include "pwdstorage.h"
/*
* Utility functions for the Password Storage Scheme plugins.
*/
/*
* calculate the number of bytes the base64 encoded encval
* will have when decoded, taking into account padding
*/
PRUint32
pwdstorage_base64_decode_len(const char *encval, PRUint32 enclen)
{
PRUint32 len = enclen;
if (len == 0) {
len = strlen(encval);
}
if (len && (0 == (len & 3))) {
if ('=' == encval[len - 1]) {
if ('=' == encval[len - 2]) {
len -= 2;
} else {
len -= 1;
}
}
}
return ((len * 3) / 4);
}
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