2002 lines
59 KiB
C
2002 lines
59 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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*
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* Copyright (C) 2011 Colin Walters <walters@verbum.org>
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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 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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Colin Walters <walters@verbum.org>
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <gio/gfiledescriptorbased.h>
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#include "libglnx.h"
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#include "ostree.h"
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#include "ostree-core-private.h"
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#include "ostree-chain-input-stream.h"
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#include "otutil.h"
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#define ALIGN_VALUE(this, boundary) \
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(( ((unsigned long)(this)) + (((unsigned long)(boundary)) -1)) & (~(((unsigned long)(boundary))-1)))
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static gboolean
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file_header_parse (GVariant *metadata,
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GFileInfo **out_file_info,
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GVariant **out_xattrs,
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GError **error);
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static gboolean
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zlib_file_header_parse (GVariant *metadata,
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GFileInfo **out_file_info,
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GVariant **out_xattrs,
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GError **error);
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/**
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* SECTION:libostree-core
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* @title: Core repository-independent functions
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* @short_description: Create, validate, and convert core data types
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*
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* These functions implement repository-independent algorithms for
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* operating on the core OSTree data formats, such as converting
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* #GFileInfo into a #GVariant.
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*
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* There are 4 types of objects; file, dirmeta, tree, and commit. The
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* last 3 are metadata, and the file object is the only content object
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* type.
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*
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* All metadata objects are stored as #GVariant (big endian). The
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* rationale for this is the same as that of the ext{2,3,4} family of
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* filesystems; most developers will be using LE, and so it's better
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* to continually test the BE->LE swap.
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*
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* The file object is a custom format in order to support streaming.
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*/
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const GVariantType *
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ostree_metadata_variant_type (OstreeObjectType objtype)
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{
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switch (objtype)
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{
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case OSTREE_OBJECT_TYPE_DIR_TREE:
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return OSTREE_TREE_GVARIANT_FORMAT;
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case OSTREE_OBJECT_TYPE_DIR_META:
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return OSTREE_DIRMETA_GVARIANT_FORMAT;
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case OSTREE_OBJECT_TYPE_COMMIT:
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return OSTREE_COMMIT_GVARIANT_FORMAT;
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default:
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g_assert_not_reached ();
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}
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}
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/**
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* ostree_validate_checksum_string:
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* @sha256: SHA256 hex string
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* @error: Error
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*
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* Use this function to see if input strings are checksums.
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*
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* Returns: %TRUE if @sha256 is a valid checksum string, %FALSE otherwise
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*/
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gboolean
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ostree_validate_checksum_string (const char *sha256,
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GError **error)
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{
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return ostree_validate_structureof_checksum_string (sha256, error);
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}
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#define OSTREE_REF_FRAGMENT_REGEXP "[-._\\w\\d]+"
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#define OSTREE_REF_REGEXP "(?:" OSTREE_REF_FRAGMENT_REGEXP "/)*" OSTREE_REF_FRAGMENT_REGEXP
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/**
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* ostree_parse_refspec:
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* @refspec: A "refspec" string
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* @out_remote: (out) (allow-none): The remote name, or %NULL if the refspec refs to a local ref
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* @out_ref: (out) (allow-none): Name of ref
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* @error: Error
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*
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* Split a refspec like "gnome-ostree:gnome-ostree/buildmaster" into
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* two parts; @out_remote will be set to "gnome-ostree", and @out_ref
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* will be "gnome-ostree/buildmaster".
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*
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* If @refspec refers to a local ref, @out_remote will be %NULL.
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*/
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gboolean
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ostree_parse_refspec (const char *refspec,
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char **out_remote,
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char **out_ref,
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GError **error)
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{
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gboolean ret = FALSE;
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GMatchInfo *match = NULL;
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g_autofree char *remote = NULL;
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static gsize regex_initialized;
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static GRegex *regex;
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if (g_once_init_enter (®ex_initialized))
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{
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regex = g_regex_new ("^(" OSTREE_REF_FRAGMENT_REGEXP ":)?(" OSTREE_REF_REGEXP ")$", 0, 0, NULL);
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g_assert (regex);
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g_once_init_leave (®ex_initialized, 1);
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}
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if (!g_regex_match (regex, refspec, 0, &match))
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Invalid refspec %s", refspec);
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goto out;
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}
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remote = g_match_info_fetch (match, 1);
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if (*remote == '\0')
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{
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g_clear_pointer (&remote, g_free);
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}
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else
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{
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/* Trim the : */
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remote[strlen(remote)-1] = '\0';
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}
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ret = TRUE;
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if (out_remote)
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*out_remote = g_steal_pointer (&remote);
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if (out_ref != NULL)
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*out_ref = g_match_info_fetch (match, 2);
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out:
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if (match)
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g_match_info_unref (match);
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return ret;
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}
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/**
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* ostree_validate_rev:
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* @rev: A revision string
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* @error: Error
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*
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* Returns: %TRUE if @rev is a valid ref string
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*/
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gboolean
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ostree_validate_rev (const char *rev,
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GError **error)
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{
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gboolean ret = FALSE;
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GMatchInfo *match = NULL;
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static gsize regex_initialized;
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static GRegex *regex;
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if (g_once_init_enter (®ex_initialized))
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{
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regex = g_regex_new ("^" OSTREE_REF_REGEXP "$", 0, 0, NULL);
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g_assert (regex);
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g_once_init_leave (®ex_initialized, 1);
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}
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if (!g_regex_match (regex, rev, 0, &match))
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Invalid ref name %s", rev);
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goto out;
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}
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ret = TRUE;
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out:
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if (match)
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g_match_info_unref (match);
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return ret;
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}
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static GVariant *
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file_header_new (GFileInfo *file_info,
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GVariant *xattrs)
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{
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guint32 uid;
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guint32 gid;
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guint32 mode;
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const char *symlink_target;
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GVariant *ret;
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g_autoptr(GVariant) tmp_xattrs = NULL;
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uid = g_file_info_get_attribute_uint32 (file_info, "unix::uid");
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gid = g_file_info_get_attribute_uint32 (file_info, "unix::gid");
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mode = g_file_info_get_attribute_uint32 (file_info, "unix::mode");
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if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_SYMBOLIC_LINK)
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symlink_target = g_file_info_get_symlink_target (file_info);
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else
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symlink_target = "";
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if (xattrs == NULL)
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tmp_xattrs = g_variant_ref_sink (g_variant_new_array (G_VARIANT_TYPE ("(ayay)"), NULL, 0));
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ret = g_variant_new ("(uuuus@a(ayay))", GUINT32_TO_BE (uid),
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GUINT32_TO_BE (gid), GUINT32_TO_BE (mode), 0,
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symlink_target, xattrs ? xattrs : tmp_xattrs);
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g_variant_ref_sink (ret);
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return ret;
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}
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/*
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* ostree_zlib_file_header_new:
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* @file_info: a #GFileInfo
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* @xattrs: (allow-none): Optional extended attribute array
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*
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* Returns: (transfer full): A new #GVariant containing file header for an archive-z2 repository
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*/
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GVariant *
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_ostree_zlib_file_header_new (GFileInfo *file_info,
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GVariant *xattrs)
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{
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guint64 size;
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guint32 uid;
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guint32 gid;
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guint32 mode;
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const char *symlink_target;
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GVariant *ret;
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g_autoptr(GVariant) tmp_xattrs = NULL;
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size = g_file_info_get_size (file_info);
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uid = g_file_info_get_attribute_uint32 (file_info, "unix::uid");
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gid = g_file_info_get_attribute_uint32 (file_info, "unix::gid");
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mode = g_file_info_get_attribute_uint32 (file_info, "unix::mode");
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if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_SYMBOLIC_LINK)
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symlink_target = g_file_info_get_symlink_target (file_info);
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else
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symlink_target = "";
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if (xattrs == NULL)
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tmp_xattrs = g_variant_ref_sink (g_variant_new_array (G_VARIANT_TYPE ("(ayay)"), NULL, 0));
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ret = g_variant_new ("(tuuuus@a(ayay))",
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GUINT64_TO_BE (size), GUINT32_TO_BE (uid),
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GUINT32_TO_BE (gid), GUINT32_TO_BE (mode), 0,
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symlink_target, xattrs ? xattrs : tmp_xattrs);
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g_variant_ref_sink (ret);
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return ret;
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}
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static gboolean
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write_padding (GOutputStream *output,
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guint alignment,
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gsize offset,
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gsize *out_bytes_written,
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GChecksum *checksum,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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guint bits;
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guint padding_len;
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guchar padding_nuls[8] = {0, 0, 0, 0, 0, 0, 0, 0};
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if (alignment == 8)
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bits = ((offset) & 7);
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else
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bits = ((offset) & 3);
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if (bits > 0)
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{
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padding_len = alignment - bits;
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if (!ot_gio_write_update_checksum (output, (guchar*)padding_nuls, padding_len,
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out_bytes_written, checksum,
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cancellable, error))
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goto out;
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}
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ret = TRUE;
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out:
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return ret;
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}
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/*
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* _ostree_write_variant_with_size:
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* @output: Stream
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* @variant: A variant
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* @alignment_offset: Used to determine whether or not we should write padding bytes
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* @out_bytes_written: (out): Number of bytes written
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* @checksum: (allow-none): If provided, update with written data
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* @cancellable: Cancellable
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* @error: Error
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*
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* Use this function for serializing a chain of 1 or more variants
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* into a stream; the @alignment_offset parameter is used to ensure
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* that each variant begins on an 8-byte alignment so it can be safely
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* accessed.
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*/
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gboolean
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_ostree_write_variant_with_size (GOutputStream *output,
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GVariant *variant,
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guint64 alignment_offset,
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gsize *out_bytes_written,
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GChecksum *checksum,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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guint64 variant_size;
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guint32 variant_size_u32_be;
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gsize bytes_written;
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gsize ret_bytes_written = 0;
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/* Write variant size */
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variant_size = g_variant_get_size (variant);
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g_assert (variant_size < G_MAXUINT32);
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variant_size_u32_be = GUINT32_TO_BE((guint32) variant_size);
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bytes_written = 0;
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if (!ot_gio_write_update_checksum (output, &variant_size_u32_be, 4,
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&bytes_written, checksum,
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cancellable, error))
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goto out;
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ret_bytes_written += bytes_written;
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alignment_offset += bytes_written;
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bytes_written = 0;
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/* Pad to offset of 8, write variant */
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if (!write_padding (output, 8, alignment_offset, &bytes_written, checksum,
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cancellable, error))
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goto out;
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ret_bytes_written += bytes_written;
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bytes_written = 0;
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if (!ot_gio_write_update_checksum (output, g_variant_get_data (variant),
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variant_size, &bytes_written, checksum,
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cancellable, error))
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goto out;
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ret_bytes_written += bytes_written;
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ret = TRUE;
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if (out_bytes_written)
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*out_bytes_written = ret_bytes_written;
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out:
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return ret;
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}
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/*
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* write_file_header_update_checksum:
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* @out: Stream
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* @variant: A variant, should be a file header
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* @checksum: (allow-none): If provided, update with written data
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* @cancellable: Cancellable
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* @error: Error
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*
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* Write a file header variant to the provided @out stream, optionally
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* updating @checksum.
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*/
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static gboolean
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write_file_header_update_checksum (GOutputStream *out,
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GVariant *header,
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GChecksum *checksum,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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gsize bytes_written;
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if (!_ostree_write_variant_with_size (out, header, 0, &bytes_written, checksum,
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cancellable, error))
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goto out;
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ret = TRUE;
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out:
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return ret;
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}
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/**
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* ostree_raw_file_to_content_stream:
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* @input: File raw content stream
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* @file_info: A file info
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* @xattrs: (allow-none): Optional extended attributes
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* @out_input: (out): Serialized object stream
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* @out_length: (out): Length of stream
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* @cancellable: Cancellable
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* @error: Error
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*
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* Convert from a "bare" file representation into an
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* OSTREE_OBJECT_TYPE_FILE stream. This is a fundamental operation
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* for writing data to an #OstreeRepo.
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*/
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gboolean
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ostree_raw_file_to_content_stream (GInputStream *input,
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GFileInfo *file_info,
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GVariant *xattrs,
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GInputStream **out_input,
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guint64 *out_length,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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gpointer header_data;
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gsize header_size;
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g_autoptr(GInputStream) ret_input = NULL;
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g_autoptr(GVariant) file_header = NULL;
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g_autoptr(GPtrArray) streams = NULL;
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g_autoptr(GOutputStream) header_out_stream = NULL;
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g_autoptr(GInputStream) header_in_stream = NULL;
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file_header = file_header_new (file_info, xattrs);
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header_out_stream = g_memory_output_stream_new (NULL, 0, g_realloc, g_free);
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if (!_ostree_write_variant_with_size (header_out_stream, file_header, 0, NULL, NULL,
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cancellable, error))
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goto out;
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if (!g_output_stream_close (header_out_stream, cancellable, error))
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goto out;
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header_size = g_memory_output_stream_get_data_size ((GMemoryOutputStream*) header_out_stream);
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header_data = g_memory_output_stream_steal_data ((GMemoryOutputStream*) header_out_stream);
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header_in_stream = g_memory_input_stream_new_from_data (header_data, header_size, g_free);
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streams = g_ptr_array_new_with_free_func ((GDestroyNotify)g_object_unref);
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g_ptr_array_add (streams, g_object_ref (header_in_stream));
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if (input)
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g_ptr_array_add (streams, g_object_ref (input));
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ret_input = (GInputStream*)ostree_chain_input_stream_new (streams);
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ret = TRUE;
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ot_transfer_out_value (out_input, &ret_input);
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if (out_length)
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*out_length = header_size + g_file_info_get_size (file_info);
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out:
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return ret;
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}
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/**
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* ostree_content_stream_parse:
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* @compressed: Whether or not the stream is zlib-compressed
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* @input: Object content stream
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* @input_length: Length of stream
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* @trusted: If %TRUE, assume the content has been validated
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* @out_input: (out): The raw file content stream
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* @out_file_info: (out): Normal metadata
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* @out_xattrs: (out): Extended attributes
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* @cancellable: Cancellable
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* @error: Error
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*
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* The reverse of ostree_raw_file_to_content_stream(); this function
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* converts an object content stream back into components.
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*/
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gboolean
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ostree_content_stream_parse (gboolean compressed,
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GInputStream *input,
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guint64 input_length,
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gboolean trusted,
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GInputStream **out_input,
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GFileInfo **out_file_info,
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GVariant **out_xattrs,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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guint32 archive_header_size;
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guchar dummy[4];
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gsize bytes_read;
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g_autoptr(GInputStream) ret_input = NULL;
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g_autoptr(GFileInfo) ret_file_info = NULL;
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g_autoptr(GVariant) ret_xattrs = NULL;
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g_autoptr(GVariant) file_header = NULL;
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g_autofree guchar *buf = NULL;
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if (!g_input_stream_read_all (input,
|
|
&archive_header_size, 4, &bytes_read,
|
|
cancellable, error))
|
|
goto out;
|
|
archive_header_size = GUINT32_FROM_BE (archive_header_size);
|
|
if (archive_header_size > input_length)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"File header size %u exceeds size %" G_GUINT64_FORMAT,
|
|
(guint)archive_header_size, input_length);
|
|
goto out;
|
|
}
|
|
if (archive_header_size == 0)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"File header size is zero");
|
|
goto out;
|
|
}
|
|
|
|
/* Skip over padding */
|
|
if (!g_input_stream_read_all (input,
|
|
dummy, 4, &bytes_read,
|
|
cancellable, error))
|
|
goto out;
|
|
|
|
buf = g_malloc (archive_header_size);
|
|
if (!g_input_stream_read_all (input, buf, archive_header_size, &bytes_read,
|
|
cancellable, error))
|
|
goto out;
|
|
file_header = g_variant_new_from_data (compressed ? _OSTREE_ZLIB_FILE_HEADER_GVARIANT_FORMAT : _OSTREE_FILE_HEADER_GVARIANT_FORMAT,
|
|
buf, archive_header_size, trusted,
|
|
g_free, buf);
|
|
buf = NULL;
|
|
|
|
if (compressed)
|
|
{
|
|
if (!zlib_file_header_parse (file_header,
|
|
out_file_info ? &ret_file_info : NULL,
|
|
out_xattrs ? &ret_xattrs : NULL,
|
|
error))
|
|
goto out;
|
|
}
|
|
else
|
|
{
|
|
if (!file_header_parse (file_header,
|
|
out_file_info ? &ret_file_info : NULL,
|
|
out_xattrs ? &ret_xattrs : NULL,
|
|
error))
|
|
goto out;
|
|
if (ret_file_info)
|
|
g_file_info_set_size (ret_file_info, input_length - archive_header_size - 8);
|
|
}
|
|
|
|
if (g_file_info_get_file_type (ret_file_info) == G_FILE_TYPE_REGULAR
|
|
&& out_input)
|
|
{
|
|
/* Give the input stream at its current position as return value;
|
|
* assuming the caller doesn't seek, this should be fine. We might
|
|
* want to wrap it though in a non-seekable stream.
|
|
**/
|
|
if (compressed)
|
|
{
|
|
g_autoptr(GConverter) zlib_decomp = (GConverter*)g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_RAW);
|
|
ret_input = g_converter_input_stream_new (input, zlib_decomp);
|
|
}
|
|
else
|
|
ret_input = g_object_ref (input);
|
|
}
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value (out_input, &ret_input);
|
|
ot_transfer_out_value (out_file_info, &ret_file_info);
|
|
ot_transfer_out_value (out_xattrs, &ret_xattrs);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_content_file_parse_at:
|
|
* @compressed: Whether or not the stream is zlib-compressed
|
|
* @parent_dfd: Directory file descriptor
|
|
* @path: Subpath
|
|
* @trusted: If %TRUE, assume the content has been validated
|
|
* @out_input: (out): The raw file content stream
|
|
* @out_file_info: (out): Normal metadata
|
|
* @out_xattrs: (out): Extended attributes
|
|
* @cancellable: Cancellable
|
|
* @error: Error
|
|
*
|
|
* A thin wrapper for ostree_content_stream_parse(); this function
|
|
* converts an object content stream back into components.
|
|
*/
|
|
gboolean
|
|
ostree_content_file_parse_at (gboolean compressed,
|
|
int parent_dfd,
|
|
const char *path,
|
|
gboolean trusted,
|
|
GInputStream **out_input,
|
|
GFileInfo **out_file_info,
|
|
GVariant **out_xattrs,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
struct stat stbuf;
|
|
g_autoptr(GInputStream) file_input = NULL;
|
|
g_autoptr(GInputStream) ret_input = NULL;
|
|
g_autoptr(GFileInfo) ret_file_info = NULL;
|
|
g_autoptr(GVariant) ret_xattrs = NULL;
|
|
|
|
if (!ot_openat_read_stream (parent_dfd, path, TRUE, &file_input,
|
|
cancellable, error))
|
|
goto out;
|
|
|
|
if (!glnx_stream_fstat ((GFileDescriptorBased*)file_input, &stbuf, error))
|
|
goto out;
|
|
|
|
if (!ostree_content_stream_parse (compressed, file_input, stbuf.st_size, trusted,
|
|
out_input ? &ret_input : NULL,
|
|
&ret_file_info, &ret_xattrs,
|
|
cancellable, error))
|
|
goto out;
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value (out_input, &ret_input);
|
|
ot_transfer_out_value (out_file_info, &ret_file_info);
|
|
ot_transfer_out_value (out_xattrs, &ret_xattrs);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_content_file_parse:
|
|
* @compressed: Whether or not the stream is zlib-compressed
|
|
* @content_path: Path to file containing content
|
|
* @trusted: If %TRUE, assume the content has been validated
|
|
* @out_input: (out): The raw file content stream
|
|
* @out_file_info: (out): Normal metadata
|
|
* @out_xattrs: (out): Extended attributes
|
|
* @cancellable: Cancellable
|
|
* @error: Error
|
|
*
|
|
* A thin wrapper for ostree_content_stream_parse(); this function
|
|
* converts an object content stream back into components.
|
|
*/
|
|
gboolean
|
|
ostree_content_file_parse (gboolean compressed,
|
|
GFile *content_path,
|
|
gboolean trusted,
|
|
GInputStream **out_input,
|
|
GFileInfo **out_file_info,
|
|
GVariant **out_xattrs,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
return ostree_content_file_parse_at (compressed, AT_FDCWD,
|
|
gs_file_get_path_cached (content_path),
|
|
trusted,
|
|
out_input, out_file_info, out_xattrs,
|
|
cancellable, error);
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_file_from_input:
|
|
* @file_info: File information
|
|
* @xattrs: (allow-none): Optional extended attributes
|
|
* @in: (allow-none): File content, should be %NULL for symbolic links
|
|
* @objtype: Object type
|
|
* @out_csum: (out) (array fixed-size=32): Return location for binary checksum
|
|
* @cancellable: Cancellable
|
|
* @error: Error
|
|
*
|
|
* Compute the OSTree checksum for a given input.
|
|
*/
|
|
gboolean
|
|
ostree_checksum_file_from_input (GFileInfo *file_info,
|
|
GVariant *xattrs,
|
|
GInputStream *in,
|
|
OstreeObjectType objtype,
|
|
guchar **out_csum,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
g_autofree guchar *ret_csum = NULL;
|
|
GChecksum *checksum = NULL;
|
|
|
|
checksum = g_checksum_new (G_CHECKSUM_SHA256);
|
|
|
|
if (OSTREE_OBJECT_TYPE_IS_META (objtype))
|
|
{
|
|
if (!ot_gio_splice_update_checksum (NULL, in, checksum, cancellable, error))
|
|
goto out;
|
|
}
|
|
else if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_DIRECTORY)
|
|
{
|
|
g_autoptr(GVariant) dirmeta = ostree_create_directory_metadata (file_info, xattrs);
|
|
g_checksum_update (checksum, g_variant_get_data (dirmeta),
|
|
g_variant_get_size (dirmeta));
|
|
|
|
}
|
|
else
|
|
{
|
|
g_autoptr(GVariant) file_header = NULL;
|
|
|
|
file_header = file_header_new (file_info, xattrs);
|
|
|
|
if (!write_file_header_update_checksum (NULL, file_header, checksum,
|
|
cancellable, error))
|
|
goto out;
|
|
|
|
if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_REGULAR)
|
|
{
|
|
if (!ot_gio_splice_update_checksum (NULL, in, checksum, cancellable, error))
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret_csum = ot_csum_from_gchecksum (checksum);
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value (out_csum, &ret_csum);
|
|
out:
|
|
g_clear_pointer (&checksum, (GDestroyNotify)g_checksum_free);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_file:
|
|
* @f: File path
|
|
* @objtype: Object type
|
|
* @out_csum: (out) (array fixed-size=32): Return location for binary checksum
|
|
* @cancellable: Cancellable
|
|
* @error: Error
|
|
*
|
|
* Compute the OSTree checksum for a given file.
|
|
*/
|
|
gboolean
|
|
ostree_checksum_file (GFile *f,
|
|
OstreeObjectType objtype,
|
|
guchar **out_csum,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
g_autoptr(GFileInfo) file_info = NULL;
|
|
g_autoptr(GInputStream) in = NULL;
|
|
g_autoptr(GVariant) xattrs = NULL;
|
|
g_autofree guchar *ret_csum = NULL;
|
|
|
|
if (g_cancellable_set_error_if_cancelled (cancellable, error))
|
|
return FALSE;
|
|
|
|
file_info = g_file_query_info (f, OSTREE_GIO_FAST_QUERYINFO,
|
|
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
|
|
cancellable, error);
|
|
if (!file_info)
|
|
goto out;
|
|
|
|
if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_REGULAR)
|
|
{
|
|
in = (GInputStream*)g_file_read (f, cancellable, error);
|
|
if (!in)
|
|
goto out;
|
|
}
|
|
|
|
if (objtype == OSTREE_OBJECT_TYPE_FILE)
|
|
{
|
|
if (!glnx_dfd_name_get_all_xattrs (AT_FDCWD, gs_file_get_path_cached (f),
|
|
&xattrs, cancellable, error))
|
|
goto out;
|
|
}
|
|
|
|
if (!ostree_checksum_file_from_input (file_info, xattrs, in, objtype,
|
|
&ret_csum, cancellable, error))
|
|
goto out;
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value(out_csum, &ret_csum);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
typedef struct {
|
|
GFile *f;
|
|
OstreeObjectType objtype;
|
|
guchar *csum;
|
|
} ChecksumFileAsyncData;
|
|
|
|
static void
|
|
checksum_file_async_thread (GSimpleAsyncResult *res,
|
|
GObject *object,
|
|
GCancellable *cancellable)
|
|
{
|
|
GError *error = NULL;
|
|
ChecksumFileAsyncData *data;
|
|
guchar *csum = NULL;
|
|
|
|
data = g_simple_async_result_get_op_res_gpointer (res);
|
|
if (!ostree_checksum_file (data->f, data->objtype, &csum, cancellable, &error))
|
|
g_simple_async_result_take_error (res, error);
|
|
else
|
|
data->csum = csum;
|
|
}
|
|
|
|
static void
|
|
checksum_file_async_data_free (gpointer datap)
|
|
{
|
|
ChecksumFileAsyncData *data = datap;
|
|
|
|
g_object_unref (data->f);
|
|
g_free (data->csum);
|
|
g_free (data);
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_file_async:
|
|
* @f: File path
|
|
* @objtype: Object type
|
|
* @io_priority: Priority for operation, see %G_IO_PRIORITY_DEFAULT
|
|
* @cancellable: Cancellable
|
|
* @callback: Invoked when operation is complete
|
|
* @user_data: Data for @callback
|
|
*
|
|
* Asynchronously compute the OSTree checksum for a given file;
|
|
* complete with ostree_checksum_file_async_finish().
|
|
*/
|
|
void
|
|
ostree_checksum_file_async (GFile *f,
|
|
OstreeObjectType objtype,
|
|
int io_priority,
|
|
GCancellable *cancellable,
|
|
GAsyncReadyCallback callback,
|
|
gpointer user_data)
|
|
{
|
|
GSimpleAsyncResult *res;
|
|
ChecksumFileAsyncData *data;
|
|
|
|
data = g_new0 (ChecksumFileAsyncData, 1);
|
|
data->f = g_object_ref (f);
|
|
data->objtype = objtype;
|
|
|
|
res = g_simple_async_result_new (G_OBJECT (f), callback, user_data, ostree_checksum_file_async);
|
|
g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify)checksum_file_async_data_free);
|
|
|
|
g_simple_async_result_run_in_thread (res, checksum_file_async_thread, io_priority, cancellable);
|
|
g_object_unref (res);
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_file_async_finish:
|
|
* @f: File path
|
|
* @result: Async result
|
|
* @out_csum: (out) (array fixed-size=32): Return location for binary checksum
|
|
* @error: Error
|
|
*
|
|
* Finish computing the OSTree checksum for a given file; see
|
|
* ostree_checksum_file_async().
|
|
*/
|
|
gboolean
|
|
ostree_checksum_file_async_finish (GFile *f,
|
|
GAsyncResult *result,
|
|
guchar **out_csum,
|
|
GError **error)
|
|
{
|
|
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
|
|
ChecksumFileAsyncData *data;
|
|
|
|
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == ostree_checksum_file_async);
|
|
|
|
if (g_simple_async_result_propagate_error (simple, error))
|
|
return FALSE;
|
|
|
|
data = g_simple_async_result_get_op_res_gpointer (simple);
|
|
/* Transfer ownership */
|
|
*out_csum = data->csum;
|
|
data->csum = NULL;
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* ostree_create_directory_metadata:
|
|
* @dir_info: a #GFileInfo containing directory information
|
|
* @xattrs: (allow-none): Optional extended attributes
|
|
*
|
|
* Returns: (transfer full): A new #GVariant containing %OSTREE_OBJECT_TYPE_DIR_META
|
|
*/
|
|
GVariant *
|
|
ostree_create_directory_metadata (GFileInfo *dir_info,
|
|
GVariant *xattrs)
|
|
{
|
|
GVariant *ret_metadata = NULL;
|
|
|
|
ret_metadata = g_variant_new ("(uuu@a(ayay))",
|
|
GUINT32_TO_BE (g_file_info_get_attribute_uint32 (dir_info, "unix::uid")),
|
|
GUINT32_TO_BE (g_file_info_get_attribute_uint32 (dir_info, "unix::gid")),
|
|
GUINT32_TO_BE (g_file_info_get_attribute_uint32 (dir_info, "unix::mode")),
|
|
xattrs ? xattrs : g_variant_new_array (G_VARIANT_TYPE ("(ayay)"), NULL, 0));
|
|
g_variant_ref_sink (ret_metadata);
|
|
|
|
return ret_metadata;
|
|
}
|
|
|
|
/* Create a randomly-named symbolic link in @tempdir which points to
|
|
* @target. The filename will be returned in @out_file.
|
|
*
|
|
* The reason this odd function exists is that the repo should only
|
|
* contain objects in their final state. For bare repositories, we
|
|
* need to first create the symlink, then chown it, and apply all
|
|
* extended attributes, before finally rename()ing it into place.
|
|
*
|
|
* Furthermore for checkouts, we use this to implement union mode
|
|
* where we override existing files via tempfile+rename().
|
|
*/
|
|
gboolean
|
|
_ostree_make_temporary_symlink_at (int tmp_dirfd,
|
|
const char *target,
|
|
char **out_name,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
g_autofree char *tmpname = NULL;
|
|
guint i;
|
|
const int max_attempts = 128;
|
|
|
|
for (i = 0; i < max_attempts; i++)
|
|
{
|
|
g_free (tmpname);
|
|
tmpname = gs_fileutil_gen_tmp_name (NULL, NULL);
|
|
if (symlinkat (target, tmp_dirfd, tmpname) < 0)
|
|
{
|
|
if (errno == EEXIST)
|
|
continue;
|
|
else
|
|
{
|
|
int errsv = errno;
|
|
g_set_error_literal (error, G_IO_ERROR, g_io_error_from_errno (errsv),
|
|
g_strerror (errsv));
|
|
goto out;
|
|
}
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
if (i == max_attempts)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Exhausted attempts to open temporary file");
|
|
goto out;
|
|
}
|
|
|
|
ret = TRUE;
|
|
if (out_name)
|
|
*out_name = g_steal_pointer (&tmpname);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* ostree_object_type_to_string:
|
|
* @objtype: an #OstreeObjectType
|
|
*
|
|
* Serialize @objtype to a string; this is used for file extensions.
|
|
*/
|
|
const char *
|
|
ostree_object_type_to_string (OstreeObjectType objtype)
|
|
{
|
|
switch (objtype)
|
|
{
|
|
case OSTREE_OBJECT_TYPE_FILE:
|
|
return "file";
|
|
case OSTREE_OBJECT_TYPE_DIR_TREE:
|
|
return "dirtree";
|
|
case OSTREE_OBJECT_TYPE_DIR_META:
|
|
return "dirmeta";
|
|
case OSTREE_OBJECT_TYPE_COMMIT:
|
|
return "commit";
|
|
case OSTREE_OBJECT_TYPE_TOMBSTONE_COMMIT:
|
|
return "tombstone-commit";
|
|
default:
|
|
g_assert_not_reached ();
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ostree_object_type_from_string:
|
|
* @str: A stringified version of #OstreeObjectType
|
|
*
|
|
* The reverse of ostree_object_type_to_string().
|
|
*/
|
|
OstreeObjectType
|
|
ostree_object_type_from_string (const char *str)
|
|
{
|
|
if (!strcmp (str, "file"))
|
|
return OSTREE_OBJECT_TYPE_FILE;
|
|
else if (!strcmp (str, "dirtree"))
|
|
return OSTREE_OBJECT_TYPE_DIR_TREE;
|
|
else if (!strcmp (str, "dirmeta"))
|
|
return OSTREE_OBJECT_TYPE_DIR_META;
|
|
else if (!strcmp (str, "commit"))
|
|
return OSTREE_OBJECT_TYPE_COMMIT;
|
|
g_assert_not_reached ();
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ostree_object_to_string:
|
|
* @checksum: An ASCII checksum
|
|
* @objtype: Object type
|
|
*
|
|
* Returns: A string containing both @checksum and a stringifed version of @objtype
|
|
*/
|
|
char *
|
|
ostree_object_to_string (const char *checksum,
|
|
OstreeObjectType objtype)
|
|
{
|
|
return g_strconcat (checksum, ".", ostree_object_type_to_string (objtype), NULL);
|
|
}
|
|
|
|
/**
|
|
* ostree_object_from_string:
|
|
* @str: An ASCII checksum
|
|
* @out_checksum: (out) (transfer full): Parsed checksum
|
|
* @out_objtype: (out): Parsed object type
|
|
*
|
|
* Reverse ostree_object_to_string().
|
|
*/
|
|
void
|
|
ostree_object_from_string (const char *str,
|
|
gchar **out_checksum,
|
|
OstreeObjectType *out_objtype)
|
|
{
|
|
const char *dot;
|
|
|
|
dot = strrchr (str, '.');
|
|
g_assert (dot != NULL);
|
|
*out_checksum = g_strndup (str, dot - str);
|
|
*out_objtype = ostree_object_type_from_string (dot + 1);
|
|
}
|
|
|
|
/**
|
|
* ostree_hash_object_name:
|
|
* @a: A #GVariant containing a serialized object
|
|
*
|
|
* Use this function with #GHashTable and ostree_object_name_serialize().
|
|
*/
|
|
guint
|
|
ostree_hash_object_name (gconstpointer a)
|
|
{
|
|
GVariant *variant = (gpointer)a;
|
|
const char *checksum;
|
|
OstreeObjectType objtype;
|
|
gint objtype_int;
|
|
|
|
ostree_object_name_deserialize (variant, &checksum, &objtype);
|
|
objtype_int = (gint) objtype;
|
|
return g_str_hash (checksum) + g_int_hash (&objtype_int);
|
|
}
|
|
|
|
/**
|
|
* ostree_cmp_checksum_bytes:
|
|
* @a: A binary checksum
|
|
* @b: A binary checksum
|
|
*
|
|
* Compare two binary checksums, using memcmp().
|
|
*/
|
|
int
|
|
ostree_cmp_checksum_bytes (const guchar *a,
|
|
const guchar *b)
|
|
{
|
|
return memcmp (a, b, OSTREE_SHA256_DIGEST_LEN);
|
|
}
|
|
|
|
/**
|
|
* ostree_object_name_serialize:
|
|
* @checksum: An ASCII checksum
|
|
* @objtype: An object type
|
|
*
|
|
* Returns: (transfer floating): A new floating #GVariant containing checksum string and objtype
|
|
*/
|
|
GVariant *
|
|
ostree_object_name_serialize (const char *checksum,
|
|
OstreeObjectType objtype)
|
|
{
|
|
g_assert (objtype >= OSTREE_OBJECT_TYPE_FILE
|
|
&& objtype <= OSTREE_OBJECT_TYPE_LAST);
|
|
return g_variant_new ("(su)", checksum, (guint32)objtype);
|
|
}
|
|
|
|
/**
|
|
* ostree_object_name_deserialize:
|
|
* @variant: A #GVariant of type (su)
|
|
* @out_checksum: (out) (transfer none): Pointer into string memory of @variant with checksum
|
|
* @out_objtype: (out): Return object type
|
|
*
|
|
* Reverse ostree_object_name_serialize(). Note that @out_checksum is
|
|
* only valid for the lifetime of @variant, and must not be freed.
|
|
*/
|
|
void
|
|
ostree_object_name_deserialize (GVariant *variant,
|
|
const char **out_checksum,
|
|
OstreeObjectType *out_objtype)
|
|
{
|
|
guint32 objtype_u32;
|
|
g_variant_get (variant, "(&su)", out_checksum, &objtype_u32);
|
|
*out_objtype = (OstreeObjectType)objtype_u32;
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_b64_inplace_to_bytes: (skip)
|
|
* @checksum: (array fixed-size=32): An binary checksum of length 32
|
|
* @buf: Output location, must be at least 45 bytes in length
|
|
*
|
|
* Overwrite the contents of @buf with stringified version of @csum.
|
|
*/
|
|
void
|
|
ostree_checksum_b64_inplace_to_bytes (const char *checksum,
|
|
guchar *buf)
|
|
{
|
|
int state = 0;
|
|
guint save = 0;
|
|
char tmpbuf[44];
|
|
int i;
|
|
|
|
for (i = 0; i < 43; i++)
|
|
{
|
|
char c = checksum[i];
|
|
if (c == '_')
|
|
tmpbuf[i] = '/';
|
|
else
|
|
tmpbuf[i] = c;
|
|
}
|
|
tmpbuf[43] = '=';
|
|
|
|
g_base64_decode_step (tmpbuf, sizeof (tmpbuf), (guchar *) buf, &state, &save);
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_inplace_to_bytes:
|
|
* @checksum: a SHA256 string
|
|
* @buf: Output buffer with at least 32 bytes of space
|
|
*
|
|
* Convert @checksum from a string to binary in-place, without
|
|
* allocating memory. Use this function in hot code paths.
|
|
*/
|
|
void
|
|
ostree_checksum_inplace_to_bytes (const char *checksum,
|
|
guchar *buf)
|
|
{
|
|
guint i;
|
|
guint j;
|
|
|
|
for (i = 0, j = 0; i < OSTREE_SHA256_DIGEST_LEN; i += 1, j += 2)
|
|
{
|
|
gint big, little;
|
|
|
|
g_assert (checksum[j]);
|
|
g_assert (checksum[j+1]);
|
|
|
|
big = g_ascii_xdigit_value (checksum[j]);
|
|
little = g_ascii_xdigit_value (checksum[j+1]);
|
|
|
|
g_assert (big != -1);
|
|
g_assert (little != -1);
|
|
|
|
buf[i] = (big << 4) | little;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_to_bytes:
|
|
* @checksum: An ASCII checksum
|
|
*
|
|
* Returns: (transfer full) (array fixed-size=32): Binary checksum from @checksum of length 32; free with g_free().
|
|
*/
|
|
guchar *
|
|
ostree_checksum_to_bytes (const char *checksum)
|
|
{
|
|
guchar *ret = g_malloc (OSTREE_SHA256_DIGEST_LEN);
|
|
ostree_checksum_inplace_to_bytes (checksum, ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_to_bytes_v:
|
|
* @checksum: An ASCII checksum
|
|
*
|
|
* Returns: (transfer full): New #GVariant of type ay with length 32
|
|
*/
|
|
GVariant *
|
|
ostree_checksum_to_bytes_v (const char *checksum)
|
|
{
|
|
guchar result[OSTREE_SHA256_DIGEST_LEN];
|
|
ostree_checksum_inplace_to_bytes (checksum, result);
|
|
return ot_gvariant_new_bytearray ((guchar*)result, OSTREE_SHA256_DIGEST_LEN);
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_inplace_from_bytes: (skip)
|
|
* @csum: (array fixed-size=32): An binary checksum of length 32
|
|
* @buf: Output location, must be at least 65 bytes in length
|
|
*
|
|
* Overwrite the contents of @buf with stringified version of @csum.
|
|
*/
|
|
void
|
|
ostree_checksum_inplace_from_bytes (const guchar *csum,
|
|
char *buf)
|
|
{
|
|
static const gchar hexchars[] = "0123456789abcdef";
|
|
guint i, j;
|
|
|
|
for (i = 0, j = 0; i < OSTREE_SHA256_DIGEST_LEN; i++, j += 2)
|
|
{
|
|
guchar byte = csum[i];
|
|
buf[j] = hexchars[byte >> 4];
|
|
buf[j+1] = hexchars[byte & 0xF];
|
|
}
|
|
buf[j] = '\0';
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_b64_inplace_from_bytes: (skip)
|
|
* @csum: (array fixed-size=32): An binary checksum of length 32
|
|
* @buf: Output location, must be at least 44 bytes in length
|
|
*
|
|
* Overwrite the contents of @buf with modified base64 encoding of @csum.
|
|
* The "modified" term refers to the fact that instead of '/', the '_'
|
|
* character is used.
|
|
*/
|
|
void
|
|
ostree_checksum_b64_inplace_from_bytes (const guchar *csum,
|
|
char *buf)
|
|
{
|
|
char tmpbuf[44];
|
|
int save = 0;
|
|
int state = 0;
|
|
gsize outlen;
|
|
int i;
|
|
|
|
/* At some point, we can optimize this, but for now it's
|
|
* a lot easier to reuse GLib's base64 encoder and postprocess it
|
|
* to replace the '/' with '_'.
|
|
*/
|
|
outlen = g_base64_encode_step (csum, OSTREE_SHA256_DIGEST_LEN, FALSE, tmpbuf, &state, &save);
|
|
outlen += g_base64_encode_close (FALSE, tmpbuf+outlen, &state, &save);
|
|
g_assert (outlen == 44);
|
|
|
|
for (i = 0; i < sizeof (tmpbuf); i++)
|
|
{
|
|
char c = tmpbuf[i];
|
|
if (c == '=')
|
|
{
|
|
g_assert (i == 43);
|
|
buf[i] = '\0';
|
|
}
|
|
else if (c == '/')
|
|
buf[i] = '_';
|
|
else
|
|
buf[i] = c;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_from_bytes:
|
|
* @csum: (array fixed-size=32): An binary checksum of length 32
|
|
*
|
|
* Returns: (transfer full): String form of @csum
|
|
*/
|
|
char *
|
|
ostree_checksum_from_bytes (const guchar *csum)
|
|
{
|
|
char *ret = g_malloc (65);
|
|
ostree_checksum_inplace_from_bytes (csum, ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_from_bytes_v:
|
|
* @csum_v: #GVariant of type ay
|
|
*
|
|
* Returns: (transfer full): String form of @csum_bytes
|
|
*/
|
|
char *
|
|
ostree_checksum_from_bytes_v (GVariant *csum_v)
|
|
{
|
|
return ostree_checksum_from_bytes (ostree_checksum_bytes_peek (csum_v));
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_bytes_peek:
|
|
* @bytes: #GVariant of type ay
|
|
*
|
|
* Returns: (transfer none) (array fixed-size=32) (element-type guint8): Binary checksum data in @bytes; do not free. If @bytes does not have the correct length, return %NULL.
|
|
*/
|
|
const guchar *
|
|
ostree_checksum_bytes_peek (GVariant *bytes)
|
|
{
|
|
gsize n_elts;
|
|
const guchar *ret;
|
|
ret = g_variant_get_fixed_array (bytes, &n_elts, 1);
|
|
if (G_UNLIKELY (n_elts != OSTREE_SHA256_DIGEST_LEN))
|
|
return NULL;
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_checksum_bytes_peek_validate:
|
|
* @bytes: #GVariant of type ay
|
|
* @error: Errror
|
|
*
|
|
* Like ostree_checksum_bytes_peek(), but also throws @error.
|
|
*
|
|
* Returns: (transfer none) (array fixed-size=32) (element-type guint8): Binary checksum data
|
|
*/
|
|
const guchar *
|
|
ostree_checksum_bytes_peek_validate (GVariant *bytes,
|
|
GError **error)
|
|
{
|
|
const guchar *ret = ostree_checksum_bytes_peek (bytes);
|
|
if (G_UNLIKELY (!ret))
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid checksum of length %" G_GUINT64_FORMAT
|
|
" expected 32", (guint64) g_variant_n_children (bytes));
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* _ostree_loose_path:
|
|
* @buf: Output buffer, must be _OSTREE_LOOSE_PATH_MAX in size
|
|
* @checksum: ASCII checksum
|
|
* @objtype: Object type
|
|
* @mode: Repository mode
|
|
*
|
|
* Overwrite the contents of @buf with relative path for loose
|
|
* object.
|
|
*/
|
|
void
|
|
_ostree_loose_path (char *buf,
|
|
const char *checksum,
|
|
OstreeObjectType objtype,
|
|
OstreeRepoMode mode)
|
|
{
|
|
_ostree_loose_path_with_suffix (buf, checksum, objtype, mode, "");
|
|
}
|
|
|
|
/**
|
|
* _ostree_header_gfile_info_new:
|
|
* @mode: File mode
|
|
* @uid: File uid
|
|
* @gid: File gid
|
|
*
|
|
* OSTree only stores a subset of file attributes; for example,
|
|
* timestamps are intentionally not stored. This function creates a
|
|
* #GFileInfo based on the attributes of a `struct stat` that match
|
|
* those file attributes.
|
|
*
|
|
* Returns: (transfer full): A new #GFileInfo mapping a subset of @stbuf.
|
|
*/
|
|
GFileInfo *
|
|
_ostree_header_gfile_info_new (mode_t mode, uid_t uid, gid_t gid)
|
|
{
|
|
GFileInfo *ret = g_file_info_new ();
|
|
g_file_info_set_attribute_uint32 (ret, "standard::type", ot_gfile_type_for_mode (mode));
|
|
g_file_info_set_attribute_boolean (ret, "standard::is-symlink", S_ISLNK (mode));
|
|
g_file_info_set_attribute_uint32 (ret, "unix::uid", uid);
|
|
g_file_info_set_attribute_uint32 (ret, "unix::gid", gid);
|
|
g_file_info_set_attribute_uint32 (ret, "unix::mode", mode);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* _ostree_loose_path_with_suffix:
|
|
* @buf: Output buffer, must be _OSTREE_LOOSE_PATH_MAX in size
|
|
* @checksum: ASCII checksum
|
|
* @objtype: Object type
|
|
* @mode: Repository mode
|
|
*
|
|
* Like _ostree_loose_path, but also append a further arbitrary
|
|
* suffix; useful for finding non-core objects.
|
|
*/
|
|
void
|
|
_ostree_loose_path_with_suffix (char *buf,
|
|
const char *checksum,
|
|
OstreeObjectType objtype,
|
|
OstreeRepoMode mode,
|
|
const char *suffix)
|
|
{
|
|
*buf = checksum[0];
|
|
buf++;
|
|
*buf = checksum[1];
|
|
buf++;
|
|
snprintf (buf, _OSTREE_LOOSE_PATH_MAX - 2, "/%s.%s%s%s",
|
|
checksum + 2, ostree_object_type_to_string (objtype),
|
|
(!OSTREE_OBJECT_TYPE_IS_META (objtype) && mode == OSTREE_REPO_MODE_ARCHIVE_Z2) ? "z" : "",
|
|
suffix);
|
|
}
|
|
|
|
/*
|
|
* _ostree_get_relative_object_path:
|
|
* @checksum: ASCII checksum string
|
|
* @type: Object type
|
|
* @compressed: Whether or not the repository object is compressed
|
|
*
|
|
* Returns: (transfer full): Relative path for a loose object
|
|
*/
|
|
char *
|
|
_ostree_get_relative_object_path (const char *checksum,
|
|
OstreeObjectType type,
|
|
gboolean compressed)
|
|
{
|
|
GString *path;
|
|
|
|
g_assert (strlen (checksum) == 64);
|
|
|
|
path = g_string_new ("objects/");
|
|
|
|
g_string_append_len (path, checksum, 2);
|
|
g_string_append_c (path, '/');
|
|
g_string_append (path, checksum + 2);
|
|
g_string_append_c (path, '.');
|
|
g_string_append (path, ostree_object_type_to_string (type));
|
|
if (!OSTREE_OBJECT_TYPE_IS_META (type) && compressed)
|
|
g_string_append (path, "z");
|
|
|
|
return g_string_free (path, FALSE);
|
|
}
|
|
|
|
char *
|
|
_ostree_get_relative_static_delta_path (const char *from,
|
|
const char *to,
|
|
const char *target)
|
|
{
|
|
guint8 csum_to[OSTREE_SHA256_DIGEST_LEN];
|
|
char to_b64[44];
|
|
guint8 csum_to_copy[OSTREE_SHA256_DIGEST_LEN];
|
|
GString *ret = g_string_new ("deltas/");
|
|
|
|
ostree_checksum_inplace_to_bytes (to, csum_to);
|
|
ostree_checksum_b64_inplace_from_bytes (csum_to, to_b64);
|
|
ostree_checksum_b64_inplace_to_bytes (to_b64, csum_to_copy);
|
|
|
|
g_assert (memcmp (csum_to, csum_to_copy, OSTREE_SHA256_DIGEST_LEN) == 0);
|
|
|
|
if (from != NULL)
|
|
{
|
|
guint8 csum_from[OSTREE_SHA256_DIGEST_LEN];
|
|
char from_b64[44];
|
|
|
|
ostree_checksum_inplace_to_bytes (from, csum_from);
|
|
ostree_checksum_b64_inplace_from_bytes (csum_from, from_b64);
|
|
|
|
g_string_append_c (ret, from_b64[0]);
|
|
g_string_append_c (ret, from_b64[1]);
|
|
g_string_append_c (ret, '/');
|
|
g_string_append (ret, from_b64 + 2);
|
|
g_string_append_c (ret, '-');
|
|
}
|
|
|
|
g_string_append_c (ret, to_b64[0]);
|
|
g_string_append_c (ret, to_b64[1]);
|
|
if (from == NULL)
|
|
g_string_append_c (ret, '/');
|
|
g_string_append (ret, to_b64 + 2);
|
|
|
|
if (target != NULL)
|
|
{
|
|
g_string_append_c (ret, '/');
|
|
g_string_append (ret, target);
|
|
}
|
|
|
|
return g_string_free (ret, FALSE);
|
|
}
|
|
|
|
char *
|
|
_ostree_get_relative_static_delta_superblock_path (const char *from,
|
|
const char *to)
|
|
{
|
|
return _ostree_get_relative_static_delta_path (from, to, "superblock");
|
|
}
|
|
|
|
char *
|
|
_ostree_get_relative_static_delta_detachedmeta_path (const char *from,
|
|
const char *to)
|
|
{
|
|
return _ostree_get_relative_static_delta_path (from, to, "meta");
|
|
}
|
|
|
|
char *
|
|
_ostree_get_relative_static_delta_part_path (const char *from,
|
|
const char *to,
|
|
guint i)
|
|
{
|
|
g_autofree char *partstr = g_strdup_printf ("%u", i);
|
|
return _ostree_get_relative_static_delta_path (from, to, partstr);
|
|
}
|
|
|
|
void
|
|
_ostree_parse_delta_name (const char *delta_name,
|
|
char **out_from,
|
|
char **out_to)
|
|
{
|
|
g_auto(GStrv) parts = g_strsplit (delta_name, "-", 2);
|
|
|
|
*out_from = *out_to = NULL;
|
|
if (parts[0] && parts[1])
|
|
{
|
|
ot_transfer_out_value (out_from, &parts[0]);
|
|
ot_transfer_out_value (out_to, &parts[1]);
|
|
}
|
|
else
|
|
{
|
|
ot_transfer_out_value (out_to, &parts[0]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* file_header_parse:
|
|
* @metadata: A metadata variant of type %OSTREE_FILE_HEADER_GVARIANT_FORMAT
|
|
* @out_file_info: (out): Parsed file information
|
|
* @out_xattrs: (out): Parsed extended attribute set
|
|
* @error: Error
|
|
*
|
|
* Load file header information into standard Gio #GFileInfo object,
|
|
* along with extended attributes tored in @out_xattrs.
|
|
*/
|
|
static gboolean
|
|
file_header_parse (GVariant *metadata,
|
|
GFileInfo **out_file_info,
|
|
GVariant **out_xattrs,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
guint32 uid, gid, mode, rdev;
|
|
const char *symlink_target;
|
|
g_autoptr(GFileInfo) ret_file_info = NULL;
|
|
g_autoptr(GVariant) ret_xattrs = NULL;
|
|
|
|
g_variant_get (metadata, "(uuuu&s@a(ayay))",
|
|
&uid, &gid, &mode, &rdev,
|
|
&symlink_target, &ret_xattrs);
|
|
if (rdev != 0)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Corrupted archive file; invalid rdev %u", GUINT32_FROM_BE (rdev));
|
|
goto out;
|
|
}
|
|
|
|
uid = GUINT32_FROM_BE (uid);
|
|
gid = GUINT32_FROM_BE (gid);
|
|
mode = GUINT32_FROM_BE (mode);
|
|
|
|
ret_file_info = _ostree_header_gfile_info_new (mode, uid, gid);
|
|
|
|
if (S_ISREG (mode))
|
|
{
|
|
;
|
|
}
|
|
else if (S_ISLNK (mode))
|
|
{
|
|
g_file_info_set_attribute_byte_string (ret_file_info, "standard::symlink-target", symlink_target);
|
|
}
|
|
else
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Corrupted archive file; invalid mode %u", mode);
|
|
goto out;
|
|
}
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value(out_file_info, &ret_file_info);
|
|
ot_transfer_out_value(out_xattrs, &ret_xattrs);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* zlib_file_header_parse:
|
|
* @metadata: A metadata variant of type %OSTREE_FILE_HEADER_GVARIANT_FORMAT
|
|
* @out_file_info: (out): Parsed file information
|
|
* @out_xattrs: (out): Parsed extended attribute set
|
|
* @error: Error
|
|
*
|
|
* Like ostree_file_header_parse(), but operates on zlib-compressed
|
|
* content.
|
|
*/
|
|
static gboolean
|
|
zlib_file_header_parse (GVariant *metadata,
|
|
GFileInfo **out_file_info,
|
|
GVariant **out_xattrs,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
guint64 size;
|
|
guint32 uid, gid, mode, rdev;
|
|
const char *symlink_target;
|
|
g_autoptr(GFileInfo) ret_file_info = NULL;
|
|
g_autoptr(GVariant) ret_xattrs = NULL;
|
|
|
|
g_variant_get (metadata, "(tuuuu&s@a(ayay))", &size,
|
|
&uid, &gid, &mode, &rdev,
|
|
&symlink_target, &ret_xattrs);
|
|
if (rdev != 0)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Corrupted archive file; invalid rdev %u", GUINT32_FROM_BE (rdev));
|
|
goto out;
|
|
}
|
|
|
|
uid = GUINT32_FROM_BE (uid);
|
|
gid = GUINT32_FROM_BE (gid);
|
|
mode = GUINT32_FROM_BE (mode);
|
|
ret_file_info = _ostree_header_gfile_info_new (mode, uid, gid);
|
|
|
|
g_file_info_set_size (ret_file_info, GUINT64_FROM_BE (size));
|
|
|
|
if (S_ISREG (mode))
|
|
{
|
|
;
|
|
}
|
|
else if (S_ISLNK (mode))
|
|
{
|
|
g_file_info_set_attribute_byte_string (ret_file_info, "standard::symlink-target", symlink_target);
|
|
}
|
|
else
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Corrupted archive file; invalid mode %u", mode);
|
|
goto out;
|
|
}
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value(out_file_info, &ret_file_info);
|
|
ot_transfer_out_value(out_xattrs, &ret_xattrs);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_objtype:
|
|
* @objtype:
|
|
* @error: Error
|
|
*
|
|
* Returns: %TRUE if @objtype represents a valid object type
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_objtype (guchar objtype,
|
|
GError **error)
|
|
{
|
|
OstreeObjectType objtype_v = (OstreeObjectType) objtype;
|
|
if (objtype_v < OSTREE_OBJECT_TYPE_FILE
|
|
|| objtype_v > OSTREE_OBJECT_TYPE_COMMIT)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid object type '%u'", objtype);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_csum_v:
|
|
* @checksum: a #GVariant of type "ay"
|
|
* @error: Error
|
|
*
|
|
* Returns: %TRUE if @checksum is a valid binary SHA256 checksum
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_csum_v (GVariant *checksum,
|
|
GError **error)
|
|
{
|
|
return ostree_checksum_bytes_peek_validate (checksum, error) != NULL;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_checksum_string:
|
|
* @checksum: an ASCII string
|
|
* @error: Error
|
|
*
|
|
* Returns: %TRUE if @checksum is a valid ASCII SHA256 checksum
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_checksum_string (const char *checksum,
|
|
GError **error)
|
|
{
|
|
int i = 0;
|
|
size_t len = strlen (checksum);
|
|
|
|
if (len != 64)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid rev '%s'", checksum);
|
|
return FALSE;
|
|
}
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
guint8 c = ((guint8*) checksum)[i];
|
|
|
|
if (!((c >= 48 && c <= 57)
|
|
|| (c >= 97 && c <= 102)))
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid character '%d' in rev '%s'",
|
|
c, checksum);
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
validate_variant (GVariant *variant,
|
|
const GVariantType *variant_type,
|
|
GError **error)
|
|
{
|
|
if (!g_variant_is_normal_form (variant))
|
|
{
|
|
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Not normal form");
|
|
return FALSE;
|
|
}
|
|
if (!g_variant_is_of_type (variant, variant_type))
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Doesn't match variant type '%s'",
|
|
(char*)variant_type);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_commit:
|
|
* @commit: A commit object, %OSTREE_OBJECT_TYPE_COMMIT
|
|
* @error: Error
|
|
*
|
|
* Use this to validate the basic structure of @commit, independent of
|
|
* any other objects it references.
|
|
*
|
|
* Returns: %TRUE if @commit is structurally valid
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_commit (GVariant *commit,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
g_autoptr(GVariant) parent_csum_v = NULL;
|
|
g_autoptr(GVariant) content_csum_v = NULL;
|
|
g_autoptr(GVariant) metadata_csum_v = NULL;
|
|
gsize n_elts;
|
|
|
|
if (!validate_variant (commit, OSTREE_COMMIT_GVARIANT_FORMAT, error))
|
|
goto out;
|
|
|
|
g_variant_get_child (commit, 1, "@ay", &parent_csum_v);
|
|
(void) g_variant_get_fixed_array (parent_csum_v, &n_elts, 1);
|
|
if (n_elts > 0)
|
|
{
|
|
if (!ostree_validate_structureof_csum_v (parent_csum_v, error))
|
|
goto out;
|
|
}
|
|
|
|
g_variant_get_child (commit, 6, "@ay", &content_csum_v);
|
|
if (!ostree_validate_structureof_csum_v (content_csum_v, error))
|
|
goto out;
|
|
|
|
g_variant_get_child (commit, 7, "@ay", &metadata_csum_v);
|
|
if (!ostree_validate_structureof_csum_v (metadata_csum_v, error))
|
|
goto out;
|
|
|
|
ret = TRUE;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_dirtree:
|
|
* @dirtree: A dirtree object, %OSTREE_OBJECT_TYPE_DIR_TREE
|
|
* @error: Error
|
|
*
|
|
* Use this to validate the basic structure of @dirtree, independent of
|
|
* any other objects it references.
|
|
*
|
|
* Returns: %TRUE if @dirtree is structurally valid
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_dirtree (GVariant *dirtree,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
const char *filename;
|
|
g_autoptr(GVariant) content_csum_v = NULL;
|
|
g_autoptr(GVariant) meta_csum_v = NULL;
|
|
GVariantIter *contents_iter = NULL;
|
|
|
|
if (!validate_variant (dirtree, OSTREE_TREE_GVARIANT_FORMAT, error))
|
|
goto out;
|
|
|
|
g_variant_get_child (dirtree, 0, "a(say)", &contents_iter);
|
|
|
|
while (g_variant_iter_loop (contents_iter, "(&s@ay)",
|
|
&filename, &content_csum_v))
|
|
{
|
|
if (!ot_util_filename_validate (filename, error))
|
|
goto out;
|
|
if (!ostree_validate_structureof_csum_v (content_csum_v, error))
|
|
goto out;
|
|
}
|
|
content_csum_v = NULL;
|
|
|
|
g_variant_iter_free (contents_iter);
|
|
g_variant_get_child (dirtree, 1, "a(sayay)", &contents_iter);
|
|
|
|
while (g_variant_iter_loop (contents_iter, "(&s@ay@ay)",
|
|
&filename, &content_csum_v, &meta_csum_v))
|
|
{
|
|
if (!ot_util_filename_validate (filename, error))
|
|
goto out;
|
|
if (!ostree_validate_structureof_csum_v (content_csum_v, error))
|
|
goto out;
|
|
if (!ostree_validate_structureof_csum_v (meta_csum_v, error))
|
|
goto out;
|
|
}
|
|
content_csum_v = NULL;
|
|
meta_csum_v = NULL;
|
|
|
|
ret = TRUE;
|
|
out:
|
|
if (contents_iter)
|
|
g_variant_iter_free (contents_iter);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
validate_stat_mode_perms (guint32 mode,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
guint32 otherbits = (~S_IFMT & ~S_IRWXU & ~S_IRWXG & ~S_IRWXO &
|
|
~S_ISUID & ~S_ISGID & ~S_ISVTX);
|
|
|
|
if (mode & otherbits)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid mode %u; invalid bits in mode", mode);
|
|
goto out;
|
|
}
|
|
|
|
ret = TRUE;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_file_mode:
|
|
* @mode: A Unix filesystem mode
|
|
* @error: Error
|
|
*
|
|
* Returns: %TRUE if @mode represents a valid file type and permissions
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_file_mode (guint32 mode,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
|
|
if (!(S_ISREG (mode) || S_ISLNK (mode)))
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid file metadata mode %u; not a valid file type", mode);
|
|
goto out;
|
|
}
|
|
|
|
if (!validate_stat_mode_perms (mode, error))
|
|
goto out;
|
|
|
|
ret = TRUE;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_validate_structureof_dirmeta:
|
|
* @dirmeta: A dirmeta object, %OSTREE_OBJECT_TYPE_DIR_META
|
|
* @error: Error
|
|
*
|
|
* Use this to validate the basic structure of @dirmeta.
|
|
*
|
|
* Returns: %TRUE if @dirmeta is structurally valid
|
|
*/
|
|
gboolean
|
|
ostree_validate_structureof_dirmeta (GVariant *dirmeta,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
guint32 mode;
|
|
|
|
if (!validate_variant (dirmeta, OSTREE_DIRMETA_GVARIANT_FORMAT, error))
|
|
goto out;
|
|
|
|
g_variant_get_child (dirmeta, 2, "u", &mode);
|
|
mode = GUINT32_FROM_BE (mode);
|
|
|
|
if (!S_ISDIR (mode))
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Invalid directory metadata mode %u; not a directory", mode);
|
|
goto out;
|
|
}
|
|
|
|
if (!validate_stat_mode_perms (mode, error))
|
|
goto out;
|
|
|
|
ret = TRUE;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_commit_get_parent:
|
|
* @commit_variant: Variant of type %OSTREE_OBJECT_TYPE_COMMIT
|
|
*
|
|
* Returns: Binary checksum with parent of @commit_variant, or %NULL if none
|
|
*/
|
|
gchar *
|
|
ostree_commit_get_parent (GVariant *commit_variant)
|
|
{
|
|
g_autoptr(GVariant) bytes = NULL;
|
|
bytes = g_variant_get_child_value (commit_variant, 1);
|
|
if (g_variant_n_children (bytes) == 0)
|
|
return NULL;
|
|
return ostree_checksum_from_bytes_v (bytes);
|
|
}
|
|
|
|
guint64
|
|
ostree_commit_get_timestamp (GVariant *commit_variant)
|
|
{
|
|
guint64 ret;
|
|
g_variant_get_child (commit_variant, 5, "t", &ret);
|
|
return GUINT64_FROM_BE (ret);
|
|
}
|
|
|
|
GVariant *
|
|
_ostree_detached_metadata_append_gpg_sig (GVariant *existing_metadata,
|
|
GBytes *signature_bytes)
|
|
{
|
|
GVariantDict metadata_dict;
|
|
g_autoptr(GVariant) signature_data = NULL;
|
|
g_autoptr(GVariantBuilder) signature_builder = NULL;
|
|
|
|
g_variant_dict_init (&metadata_dict, existing_metadata);
|
|
|
|
signature_data = g_variant_dict_lookup_value (&metadata_dict,
|
|
_OSTREE_METADATA_GPGSIGS_NAME,
|
|
_OSTREE_METADATA_GPGSIGS_TYPE);
|
|
|
|
/* signature_data may be NULL */
|
|
signature_builder = ot_util_variant_builder_from_variant (signature_data, _OSTREE_METADATA_GPGSIGS_TYPE);
|
|
|
|
g_variant_builder_add (signature_builder, "@ay", ot_gvariant_new_ay_bytes (signature_bytes));
|
|
|
|
g_variant_dict_insert_value (&metadata_dict,
|
|
_OSTREE_METADATA_GPGSIGS_NAME,
|
|
g_variant_builder_end (signature_builder));
|
|
|
|
return g_variant_dict_end (&metadata_dict);
|
|
}
|
|
|
|
/**
|
|
* _ostree_get_default_sysroot_path:
|
|
*
|
|
* Returns a #GFile for the default system root, which is usually the root
|
|
* directory ("/") unless overridden by the %OSTREE_SYSROOT environment
|
|
* variable.
|
|
*
|
|
* Returns: a #GFile for the default system root
|
|
*/
|
|
GFile *
|
|
_ostree_get_default_sysroot_path (void)
|
|
{
|
|
static gsize default_sysroot_path_initialized;
|
|
static GFile *default_sysroot_path;
|
|
|
|
if (g_once_init_enter (&default_sysroot_path_initialized))
|
|
{
|
|
const char *path = g_getenv ("OSTREE_SYSROOT");
|
|
if (path == NULL || *path == '\0')
|
|
path = "/";
|
|
default_sysroot_path = g_file_new_for_path (path);
|
|
g_once_init_leave (&default_sysroot_path_initialized, 1);
|
|
}
|
|
|
|
return default_sysroot_path;
|
|
}
|