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/* Output base64 bytes, for libreswan
*
* Copyright (C) 2022 Andrew Cagney
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
*/
#include "jambuf.h"
#include "chunk.h"
#include "ttodata.h" /* for datatot() */
#include "passert.h"
#include "lswalloc.h"
size_t jam_base64_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
/*
* A byte is 8-bits, base64 uses 6-bits (2^6=64). Plus some
* for \0. Plus some extra for the trailing === and rounding.
*/
size_t base64_len = size * 8 / 6 + 1 + 10;
char *base64_ptr = alloc_things(char, base64_len, "base64");
size_t length = datatot(ptr, size, 64, base64_ptr, base64_len);
passert(length < base64_len);
jam_raw_bytes(buf, base64_ptr, length);
pfree(base64_ptr);
return length;
}
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