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136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
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*
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* Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
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*
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* Licensed under the GNU Lesser General Public License Version 2.1
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "fwupd-common-private.h"
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#include <string.h>
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/**
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* fwupd_checksum_guess_kind:
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* @checksum: A checksum
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*
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* Guesses the checksum kind based on the length of the hash.
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*
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* Returns: a #GChecksumType, e.g. %G_CHECKSUM_SHA1
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*
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* Since: 0.9.3
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**/
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GChecksumType
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fwupd_checksum_guess_kind (const gchar *checksum)
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{
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guint len;
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if (checksum == NULL)
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return G_CHECKSUM_SHA1;
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len = strlen (checksum);
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if (len == 32)
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return G_CHECKSUM_MD5;
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if (len == 40)
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return G_CHECKSUM_SHA1;
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if (len == 64)
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return G_CHECKSUM_SHA256;
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if (len == 128)
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return G_CHECKSUM_SHA512;
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return G_CHECKSUM_SHA1;
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}
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static const gchar *
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_g_checksum_type_to_string (GChecksumType checksum_type)
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{
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if (checksum_type == G_CHECKSUM_MD5)
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return "MD5";
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if (checksum_type == G_CHECKSUM_SHA1)
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return "SHA1";
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if (checksum_type == G_CHECKSUM_SHA256)
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return "SHA256";
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if (checksum_type == G_CHECKSUM_SHA512)
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return "SHA512";
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return NULL;
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}
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/**
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* fwupd_checksum_format_for_display:
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* @checksum: A checksum
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*
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* Formats a checksum for display.
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*
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* Returns: text, or %NULL for invalid
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*
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* Since: 0.9.3
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**/
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gchar *
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fwupd_checksum_format_for_display (const gchar *checksum)
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{
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GChecksumType kind = fwupd_checksum_guess_kind (checksum);
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return g_strdup_printf ("%s(%s)", _g_checksum_type_to_string (kind), checksum);
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}
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/**
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* fwupd_checksum_get_by_kind:
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* @checksums: (element-type utf8): checksums
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* @kind: a #GChecksumType, e.g. %G_CHECKSUM_SHA512
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*
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* Gets a specific checksum kind.
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*
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* Returns: a checksum from the array, or %NULL if not found
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*
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* Since: 0.9.4
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**/
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const gchar *
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fwupd_checksum_get_by_kind (GPtrArray *checksums, GChecksumType kind)
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{
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for (guint i = 0; i < checksums->len; i++) {
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const gchar *checksum = g_ptr_array_index (checksums, i);
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if (fwupd_checksum_guess_kind (checksum) == kind)
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return checksum;
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}
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return NULL;
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}
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/**
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* fwupd_checksum_get_best:
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* @checksums: (element-type utf8): checksums
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*
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* Gets a the best possible checksum kind.
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*
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* Returns: a checksum from the array, or %NULL if nothing was suitable
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*
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* Since: 0.9.4
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**/
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const gchar *
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fwupd_checksum_get_best (GPtrArray *checksums)
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{
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GChecksumType checksum_types[] = {
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G_CHECKSUM_SHA512,
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G_CHECKSUM_SHA256,
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G_CHECKSUM_SHA1,
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0 };
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for (guint i = 0; checksum_types[i] != 0; i++) {
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for (guint j = 0; j < checksums->len; j++) {
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const gchar *checksum = g_ptr_array_index (checksums, j);
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if (fwupd_checksum_guess_kind (checksum) == checksum_types[i])
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return checksum;
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}
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}
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return NULL;
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}
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