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https://git.notmuchmail.org/git/notmuch
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c906da9f60
We already depend on glib both directly and indirectly (via gmime). We might as well make use of its facilities. Drop the embedded libsha1 and use glib for sha1 digests.
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* sha1.c - Interfaces to SHA-1 hash for the notmuch mail system
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*
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* Copyright © 2009 Carl Worth
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see https://www.gnu.org/licenses/ .
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*
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* Author: Carl Worth <cworth@cworth.org>
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*/
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#include "notmuch-private.h"
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#include <glib.h>
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/* Create a hexadecimal string version of the SHA-1 digest of 'str'
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* (including its null terminating character).
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*
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* This function returns a newly allocated string which the caller
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* should free() when finished.
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*/
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char *
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_notmuch_sha1_of_string (const char *str)
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{
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GChecksum *sha1;
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char *digest;
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sha1 = g_checksum_new (G_CHECKSUM_SHA1);
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g_checksum_update (sha1, (const guchar *) str, strlen (str) + 1);
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digest = xstrdup (g_checksum_get_string (sha1));
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g_checksum_free (sha1);
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return digest;
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}
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/* Create a hexadecimal string version of the SHA-1 digest of the
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* contents of the named file.
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*
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* This function returns a newly allocated string which the caller
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* should free() when finished.
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*
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* If any error occurs while reading the file, (permission denied,
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* file not found, etc.), this function returns NULL.
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*/
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char *
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_notmuch_sha1_of_file (const char *filename)
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{
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FILE *file;
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#define BLOCK_SIZE 4096
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unsigned char block[BLOCK_SIZE];
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size_t bytes_read;
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GChecksum *sha1;
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char *digest = NULL;
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file = fopen (filename, "r");
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if (file == NULL)
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return NULL;
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sha1 = g_checksum_new (G_CHECKSUM_SHA1);
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if (sha1 == NULL)
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goto DONE;
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while (1) {
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bytes_read = fread (block, 1, 4096, file);
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if (bytes_read == 0) {
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if (feof (file))
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break;
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else if (ferror (file))
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goto DONE;
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} else {
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g_checksum_update (sha1, block, bytes_read);
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}
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}
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digest = xstrdup (g_checksum_get_string (sha1));
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DONE:
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if (sha1)
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g_checksum_free (sha1);
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if (file)
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fclose (file);
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return digest;
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}
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