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ch-hash.c
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ch-hash.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* Copyright (C) 2012-2013 Richard Hughes <richard@hughsie.com>
*
* Licensed under the GNU General Public License Version 2
*
* 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.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <string.h>
#include "ch-hash.h"
/**
* ch_sha1_to_string:
* @sha1: A %ChSha1
*
* Gets a string representation of the SHA1 hash.
*
* Return value: A string, free with g_free().
*
* Since: 0.1.29
**/
gchar *
ch_sha1_to_string (const ChSha1 *sha1)
{
GString *string = NULL;
guint i;
g_return_val_if_fail (sha1 != NULL, NULL);
/* read each byte and convert to hex */
string = g_string_new ("");
for (i = 0; i < 20; i++) {
g_string_append_printf (string, "%02x",
sha1->bytes[i]);
}
return g_string_free (string, FALSE);
}
/**
* ch_sha1_parse:
* @value: A string representation of the SHA1 hash
* @sha1: A %ChSha1
* @error: A %GError, or %NULL
*
* Parses a SHA1 hash from a string value.
*
* Return value: %TRUE for success
*
* Since: 0.1.29
**/
gboolean
ch_sha1_parse (const gchar *value, ChSha1 *sha1, GError **error)
{
gchar tmp[3] = { '\0', '\0', '\0'};
guint i;
guint len;
g_return_val_if_fail (value != NULL, FALSE);
g_return_val_if_fail (sha1 != NULL, FALSE);
/* not a SHA1 hash */
len = strlen (value);
if (len != 40) {
g_set_error (error, 1, 0,
"Invalid SHA1 hash '%s'",
value);
return FALSE;
}
/* parse */
for (i = 0; i < len; i += 2) {
tmp[0] = value[i+0];
tmp[1] = value[i+1];
sha1->bytes[i/2] = g_ascii_strtoull (tmp, NULL, 16);
}
return TRUE;
}