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/* SHA-1 thunks.
Copyright (C) 2019-2025 Free Software Foundation, Inc.
This file is part of libctf.
libctf 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 3, or (at your option) any later
version.
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.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not see
<http://www.gnu.org/licenses/>. */
#include <ctf-impl.h>
#include <ctf-sha1.h>
static const char hex[] = "0123456789abcdef";
char *
ctf_sha1_fini (ctf_sha1_t *sha1, char *buf)
{
size_t i;
/* Alignment suitable for a uint32_t. */
union
{
uint32_t align;
unsigned char digest[((CTF_SHA1_SIZE - 1) / 2) + 1];
} align;
sha1_finish_ctx (sha1, align.digest);
if (!buf)
return NULL;
buf[CTF_SHA1_SIZE - 1] = '\0';
for (i = 0; i < (CTF_SHA1_SIZE - 1) / 2; i++)
{
buf[2 * i] = hex[align.digest[i] >> 4];
buf[2 * i + 1] = hex[align.digest[i] & 0xf];
}
return buf;
}
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