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- /* SHA-1 thunks.
- Copyright (C) 2019-2022 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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