mirror of
https://github.com/mpv-player/mpv.git
synced 2024-09-20 03:52:22 +02:00
d83a9f7f03
If --write-filename-in-watch-later-config is used, and the filename contains newline characters (as generally allowed on Unix), then the newline will be written to the resume file literally, and the parts after the newline character are interpreted as options. This is possibly security relevant. Change newline characters (and in fact any other special characters) to '_'. Reported as #1099 (this commit is a reimplementation of the proposed pull request). CC: @mpv-player/stable
367 lines
12 KiB
C
367 lines
12 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer 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 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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 along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stddef.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <libavutil/md5.h>
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#include "config.h"
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#include "talloc.h"
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#include "osdep/io.h"
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#include "common/global.h"
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#include "common/encode.h"
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#include "common/msg.h"
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#include "misc/ctype.h"
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#include "options/path.h"
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#include "options/m_config.h"
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#include "options/parse_configfile.h"
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#include "common/playlist.h"
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#include "options/options.h"
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#include "options/m_property.h"
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#include "stream/stream.h"
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#include "core.h"
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#include "command.h"
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static void load_all_cfgfiles(struct MPContext *mpctx, char *section,
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char *filename)
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{
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char **cf = mp_find_all_config_files(NULL, mpctx->global, filename);
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for (int i = 0; cf && cf[i]; i++)
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m_config_parse_config_file(mpctx->mconfig, cf[i], section, 0);
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talloc_free(cf);
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}
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#define SECT_ENCODE "encoding"
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void mp_parse_cfgfiles(struct MPContext *mpctx)
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{
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struct MPOpts *opts = mpctx->opts;
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if (!opts->load_config)
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return;
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mp_mk_config_dir(mpctx->global, "");
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m_config_t *conf = mpctx->mconfig;
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char *section = NULL;
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bool encoding = opts->encode_opts &&
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opts->encode_opts->file && opts->encode_opts->file[0];
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// In encoding mode, we don't want to apply normal config options.
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// So we "divert" normal options into a separate section, and the diverted
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// section is never used - unless maybe it's explicitly referenced from an
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// encoding profile.
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if (encoding)
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section = "playback-default";
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// The #if is a stupid hack to avoid errors if libavfilter is not available.
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#if HAVE_LIBAVFILTER && HAVE_ENCODING
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char *cf = mp_find_config_file(NULL, mpctx->global, "encoding-profiles.conf");
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if (cf)
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m_config_parse_config_file(mpctx->mconfig, cf, SECT_ENCODE, 0);
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talloc_free(cf);
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#endif
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load_all_cfgfiles(mpctx, section, "config");
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load_all_cfgfiles(mpctx, section, "mpv.conf");
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if (encoding)
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m_config_set_profile(conf, m_config_add_profile(conf, SECT_ENCODE), 0);
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}
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static int try_load_config(struct MPContext *mpctx, const char *file, int flags)
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{
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if (!mp_path_exists(file))
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return 0;
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MP_INFO(mpctx, "Loading config '%s'\n", file);
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m_config_parse_config_file(mpctx->mconfig, file, NULL, flags);
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return 1;
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}
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// Set options file-local, and don't set them if the user set them via the
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// command line.
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#define FILE_LOCAL_FLAGS (M_SETOPT_BACKUP | M_SETOPT_PRESERVE_CMDLINE)
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static void mp_load_per_file_config(struct MPContext *mpctx)
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{
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struct MPOpts *opts = mpctx->opts;
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char *confpath;
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char cfg[512];
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const char *file = mpctx->filename;
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if (snprintf(cfg, sizeof(cfg), "%s.conf", file) >= sizeof(cfg)) {
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MP_VERBOSE(mpctx, "Filename is too long, "
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"can not load file or directory specific config files\n");
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return;
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}
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char *name = mp_basename(cfg);
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if (opts->use_filedir_conf) {
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bstr dir = mp_dirname(cfg);
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char *dircfg = mp_path_join(NULL, dir, bstr0("mpv.conf"));
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try_load_config(mpctx, dircfg, FILE_LOCAL_FLAGS);
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talloc_free(dircfg);
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if (try_load_config(mpctx, cfg, FILE_LOCAL_FLAGS))
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return;
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}
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if ((confpath = mp_find_config_file(NULL, mpctx->global, name))) {
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try_load_config(mpctx, confpath, FILE_LOCAL_FLAGS);
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talloc_free(confpath);
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}
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}
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static void mp_auto_load_profile(struct MPContext *mpctx, char *category,
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bstr item)
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{
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if (!item.len)
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return;
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char t[512];
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snprintf(t, sizeof(t), "%s.%.*s", category, BSTR_P(item));
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m_profile_t *p = m_config_get_profile0(mpctx->mconfig, t);
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if (p) {
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MP_INFO(mpctx, "Auto-loading profile '%s'\n", t);
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m_config_set_profile(mpctx->mconfig, p, FILE_LOCAL_FLAGS);
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}
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}
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void mp_load_auto_profiles(struct MPContext *mpctx)
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{
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struct MPOpts *opts = mpctx->opts;
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mp_auto_load_profile(mpctx, "protocol",
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mp_split_proto(bstr0(mpctx->filename), NULL));
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mp_auto_load_profile(mpctx, "extension",
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bstr0(mp_splitext(mpctx->filename, NULL)));
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mp_load_per_file_config(mpctx);
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if (opts->vo.video_driver_list)
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mp_auto_load_profile(mpctx, "vo", bstr0(opts->vo.video_driver_list[0].name));
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if (opts->audio_driver_list)
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mp_auto_load_profile(mpctx, "ao", bstr0(opts->audio_driver_list[0].name));
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}
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#define MP_WATCH_LATER_CONF "watch_later"
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static char *mp_get_playback_resume_config_filename(struct mpv_global *global,
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const char *fname)
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{
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struct MPOpts *opts = global->opts;
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char *res = NULL;
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void *tmp = talloc_new(NULL);
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const char *realpath = fname;
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bstr bfname = bstr0(fname);
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if (!mp_is_url(bfname)) {
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char *cwd = mp_getcwd(tmp);
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if (!cwd)
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goto exit;
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realpath = mp_path_join(tmp, bstr0(cwd), bstr0(fname));
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}
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if (bstr_startswith0(bfname, "dvd://"))
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realpath = talloc_asprintf(tmp, "%s - %s", realpath, opts->dvd_device);
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if (bstr_startswith0(bfname, "br://") || bstr_startswith0(bfname, "bd://") ||
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bstr_startswith0(bfname, "bluray://"))
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realpath = talloc_asprintf(tmp, "%s - %s", realpath, opts->bluray_device);
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uint8_t md5[16];
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av_md5_sum(md5, realpath, strlen(realpath));
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char *conf = talloc_strdup(tmp, "");
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for (int i = 0; i < 16; i++)
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conf = talloc_asprintf_append(conf, "%02X", md5[i]);
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res = talloc_asprintf(tmp, MP_WATCH_LATER_CONF "/%s", conf);
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res = mp_find_config_file(NULL, global, res);
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if (!res) {
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res = mp_find_config_file(tmp, global, MP_WATCH_LATER_CONF);
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if (res)
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res = talloc_asprintf(NULL, "%s/%s", res, conf);
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}
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exit:
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talloc_free(tmp);
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return res;
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}
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static const char *const backup_properties[] = {
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"options/osd-level",
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//"loop",
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"options/speed",
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"options/edition",
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"options/pause",
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"volume-restore-data",
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"options/audio-delay",
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//"balance",
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"options/fullscreen",
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"options/colormatrix",
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"options/colormatrix-input-range",
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"options/colormatrix-output-range",
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"options/ontop",
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"options/border",
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"options/gamma",
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"options/brightness",
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"options/contrast",
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"options/saturation",
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"options/hue",
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"options/deinterlace",
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"options/vf",
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"options/af",
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"options/panscan",
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"options/aid",
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"options/vid",
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"options/sid",
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"options/sub-delay",
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"options/sub-pos",
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"options/sub-visibility",
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"options/sub-scale",
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"options/ass-use-margins",
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"options/ass-vsfilter-aspect-compat",
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"options/ass-style-override",
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0
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};
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// Used to retrieve default settings, which should not be stored in the
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// resume config. Uses backup_properties[] meaning/order of values.
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// This explicitly includes values set by config files and command line.
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void mp_get_resume_defaults(struct MPContext *mpctx)
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{
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char **list =
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talloc_zero_array(mpctx, char*, MP_ARRAY_SIZE(backup_properties));
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for (int i = 0; backup_properties[i]; i++) {
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const char *pname = backup_properties[i];
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char *val = NULL;
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int r = mp_property_do(pname, M_PROPERTY_GET_STRING, &val, mpctx);
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if (r == M_PROPERTY_OK)
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list[i] = talloc_steal(list, val);
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}
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mpctx->resume_defaults = list;
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}
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// Should follow what parser-cfg.c does/needs
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static bool needs_config_quoting(const char *s)
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{
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for (int i = 0; s && s[i]; i++) {
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unsigned char c = s[i];
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if (!mp_isprint(c) || mp_isspace(c) || c == '#' || c == '\'' || c == '"')
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return true;
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}
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return false;
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}
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void mp_write_watch_later_conf(struct MPContext *mpctx)
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{
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char *filename = mpctx->filename;
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char *conffile = NULL;
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if (!filename)
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goto exit;
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double pos = get_current_time(mpctx);
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if (pos == MP_NOPTS_VALUE)
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goto exit;
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mp_mk_config_dir(mpctx->global, MP_WATCH_LATER_CONF);
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conffile = mp_get_playback_resume_config_filename(mpctx->global, filename);
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if (!conffile)
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goto exit;
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MP_INFO(mpctx, "Saving state.\n");
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FILE *file = fopen(conffile, "wb");
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if (!file)
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goto exit;
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if (mpctx->opts->write_filename_in_watch_later_config) {
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char write_name[1024] = {0};
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for (int n = 0; filename[n] && n < sizeof(write_name) - 1; n++)
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write_name[n] = (unsigned char)filename[n] < 32 ? '_' : filename[n];
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fprintf(file, "# %s\n", write_name);
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}
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fprintf(file, "start=%f\n", pos);
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for (int i = 0; backup_properties[i]; i++) {
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const char *pname = backup_properties[i];
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char *val = NULL;
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int r = mp_property_do(pname, M_PROPERTY_GET_STRING, &val, mpctx);
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if (r == M_PROPERTY_OK) {
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if (strncmp(pname, "options/", 8) == 0)
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pname += 8;
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// Only store it if it's different from the initial value.
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char *prev = mpctx->resume_defaults[i];
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if (!prev || strcmp(prev, val) != 0) {
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if (needs_config_quoting(val)) {
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// e.g. '%6%STRING'
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fprintf(file, "%s=%%%d%%%s\n", pname, (int)strlen(val), val);
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} else {
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fprintf(file, "%s=%s\n", pname, val);
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}
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}
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}
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talloc_free(val);
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}
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fclose(file);
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exit:
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talloc_free(conffile);
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}
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void mp_load_playback_resume(struct MPContext *mpctx, const char *file)
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{
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char *fname = mp_get_playback_resume_config_filename(mpctx->global, file);
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if (fname && mp_path_exists(fname)) {
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// Never apply the saved start position to following files
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m_config_backup_opt(mpctx->mconfig, "start");
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MP_INFO(mpctx, "Resuming playback. This behavior can "
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"be disabled with --no-resume-playback.\n");
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try_load_config(mpctx, fname, M_SETOPT_PRESERVE_CMDLINE);
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unlink(fname);
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}
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talloc_free(fname);
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}
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// Returns the first file that has a resume config.
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// Compared to hashing the playlist file or contents and managing separate
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// resume file for them, this is simpler, and also has the nice property
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// that appending to a playlist doesn't interfere with resuming (especially
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// if the playlist comes from the command line).
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struct playlist_entry *mp_check_playlist_resume(struct MPContext *mpctx,
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struct playlist *playlist)
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{
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if (!mpctx->opts->position_resume)
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return NULL;
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for (struct playlist_entry *e = playlist->first; e; e = e->next) {
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char *conf = mp_get_playback_resume_config_filename(mpctx->global,
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e->filename);
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bool exists = conf && mp_path_exists(conf);
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talloc_free(conf);
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if (exists)
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return e;
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}
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return NULL;
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}
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