50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* SHA-1 thunks.
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Copyright (C) 2019-2022 Free Software Foundation, Inc.
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This file is part of libctf.
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libctf is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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#include <ctf-impl.h>
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#include <ctf-sha1.h>
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static const char hex[] = "0123456789abcdef";
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char *
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ctf_sha1_fini (ctf_sha1_t *sha1, char *buf)
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{
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size_t i;
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/* Alignment suitable for a uint32_t. */
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union
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{
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uint32_t align;
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unsigned char digest[((CTF_SHA1_SIZE - 1) / 2) + 1];
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} align;
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sha1_finish_ctx (sha1, align.digest);
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if (!buf)
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return NULL;
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buf[CTF_SHA1_SIZE - 1] = '\0';
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for (i = 0; i < (CTF_SHA1_SIZE - 1) / 2; i++)
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{
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buf[2 * i] = hex[align.digest[i] >> 4];
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buf[2 * i + 1] = hex[align.digest[i] & 0xf];
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}
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return buf;
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}
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