feat(extract): swap RAR engine to unrar 7.20.1 (v1.9, v6/multi-volume)

Replace the dmc_unrar 1.7.0 backend (third_party/unrar/) with the rarlab
UnRAR 7.20.1 source vendored in third_party/unrar7/ (commit c68c0de),
driven through its C-compatible DLL API.

Why: dmc_unrar only dispatches RAR5 compression version 5
(switch(file->version) case 0x5000). WinRAR 6.x/7.x archives (algorithm
"v6") land on the default branch -> DMC_UNRAR_FILE_UNSUPPORTED_VERSION
-> user-visible "corrupt archive", confirmed on a real v6:8M archive on
2026-09-05. unrar 7.20.1 natively handles v6, multi-volume (.partNN.rar
auto-merge) and encrypted archives.

Engine changes (src/rar_extract.c):
- Facade include swapped to third_party/unrar7/unrar_c_api.h; all calls
  now go through RAROpenArchiveEx/RARReadHeaderEx/RARProcessFile/
  RARCloseArchive. scan + extract each re-open the archive (the DLL API
  is sequential, unlike dmc's index-based access).
- Error translation rewritten for the ERAR_* code set.
- extract no longer builds each staging path by hand (open_parent_dirs/
  extract_one removed): unrar writes the whole tree under the staging
  root; names were validated during scan.
- Bug fix: normalize_name() cleared the caller-provided *is_dir (it set
  *is_dir = 0), turning directory entries into files and tripping the
  duplicate detector whenever an explicit directory header followed
  files beneath it (real v6 archive had exactly this). RHDF_DIRECTORY
  is now honored end to end.
- Encrypted RAR still fails up front (ZIPX_ERR_UNSUPPORTED): unrar can
  decrypt, but password plumbing (API/UI) lands in a later commit.

Build:
- Makefile: C++ compiler vars (CXX/HOST_CXX, prospero-clang++ defaults
  to -stdlib=libc++), unrar7 RARDLL source set (49 files, mirrors
  UnRARDll.vcxproj), .cpp pattern rules, link through the C++ driver.
- tests/run-tests.sh: compiles unrar7 objects with $CXX, links the RAR
  test with g++ and -lpowrprof on Windows.
- third_party/unrar/ (dmc_unrar) removed; see git history.

Verified on host (MinGW): full engine run on the user's real v6 archive
(24.9 MB, 170 headers) -> ZIPX_OK, 170/170 entries, 133 files + 37 dirs,
71,514,931 bytes. Host suite: 70 ZIP + 14 RAR checks green.

Frontend password/multi-volume UX and release plumbing (CHANGELOG,
THIRD_PARTY_NOTICES, README, tag) follow in the v1.9 release commit.
This commit is contained in:
Songlx516 committed 2026-09-05 22:40:58 +08:00
1 parent c68c0def35
commit a0482a41ed
10 files changed
+264 -12794

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+60 -15
View File
@@ -35,22 +35,57 @@ ASSETS := $(filter-out assets/icon0.png,$(BASE_ASSETS))
endif
GEN_SRCS := $(patsubst assets/%,gen/%, $(ASSETS:=.c))
# Vendored third-party: zlib + minizip-ng (ZIP), dmc_unrar (RAR). Compiled with
# relaxed warnings (-w) — these are not our code and we do not want to chase
# upstream style updates on every SDK upgrade.
THIRD_PARTY_SRCS := $(wildcard third_party/zlib/src/*.c) $(wildcard third_party/minizip-ng/src/*.c) third_party/unrar/dmc_unrar.c
THIRD_PARTY_CFLAGS := -O2 -w -Ithird_party/zlib/include -Ithird_party/minizip-ng/include -Ithird_party/unrar \
-DHAVE_ZLIB -DZLIB_COMPAT -DHAVE_UNISTD_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DDMC_UNRAR_DISABLE_BE32TOH_BE64TOH=1
PS5_TP_OBJS := $(patsubst %.c,ps5-obj/%.o,$(THIRD_PARTY_SRCS))
LINUX_TP_OBJS := $(patsubst %.c,linux-obj/%.o,$(THIRD_PARTY_SRCS))
# Vendored third-party: zlib + minizip-ng (ZIP, C) and unrar 7.20.1 (RAR,
# C++). unrar sources are compiled as a static library in RARDLL mode (no
# main()); the project talks to it through the extern "C" DLL API in
# third_party/unrar7/unrar_c_api.h. Compiled with relaxed warnings (-w) —
# these are not our code and we do not want to chase upstream style updates.
#
# C++ compilers: PS5 uses prospero-clang++ (FreeBSD-style sysroot; the
# toolchain defaults to -stdlib=libc++, driver links libc++ automatically);
# host builds use the plain host C++ compiler (libstdc++).
CXX ?= $(dir $(CC))prospero-clang++
HOST_CXX ?= c++
CFLAGS := -Oz -fno-asynchronous-unwind-tables -fno-unwind-tables -Wall -Werror -ffunction-sections -fdata-sections -Isrc -Ithird_party/minizip-ng/include -Ithird_party/unrar -DVERSION_TAG=\"$(VERSION_TAG)\" -DTITLE_ID=\"$(TITLE_ID)\"
# Source set mirrors UnRARDll.vcxproj's ClCompile list (49 files).
UNRAR7_SRCS := \
third_party/unrar7/archive.cpp third_party/unrar7/arcread.cpp third_party/unrar7/blake2s.cpp \
third_party/unrar7/cmddata.cpp third_party/unrar7/consio.cpp third_party/unrar7/crc.cpp \
third_party/unrar7/crypt.cpp third_party/unrar7/dll.cpp third_party/unrar7/encname.cpp \
third_party/unrar7/errhnd.cpp third_party/unrar7/extinfo.cpp third_party/unrar7/extract.cpp \
third_party/unrar7/filcreat.cpp third_party/unrar7/file.cpp third_party/unrar7/filefn.cpp \
third_party/unrar7/filestr.cpp third_party/unrar7/find.cpp third_party/unrar7/getbits.cpp \
third_party/unrar7/global.cpp third_party/unrar7/hash.cpp third_party/unrar7/headers.cpp \
third_party/unrar7/isnt.cpp third_party/unrar7/largepage.cpp third_party/unrar7/match.cpp \
third_party/unrar7/motw.cpp third_party/unrar7/options.cpp third_party/unrar7/pathfn.cpp \
third_party/unrar7/qopen.cpp third_party/unrar7/rar.cpp third_party/unrar7/rarpch.cpp \
third_party/unrar7/rarvm.cpp third_party/unrar7/rawread.cpp third_party/unrar7/rdwrfn.cpp \
third_party/unrar7/rijndael.cpp third_party/unrar7/rs.cpp third_party/unrar7/rs16.cpp \
third_party/unrar7/scantree.cpp third_party/unrar7/secpassword.cpp third_party/unrar7/sha1.cpp \
third_party/unrar7/sha256.cpp third_party/unrar7/smallfn.cpp third_party/unrar7/strfn.cpp \
third_party/unrar7/strlist.cpp third_party/unrar7/system.cpp third_party/unrar7/threadpool.cpp \
third_party/unrar7/timefn.cpp third_party/unrar7/ui.cpp third_party/unrar7/unicode.cpp \
third_party/unrar7/unpack.cpp third_party/unrar7/volume.cpp
THIRD_PARTY_C_SRCS := $(wildcard third_party/zlib/src/*.c) $(wildcard third_party/minizip-ng/src/*.c)
THIRD_PARTY_C_FLAGS := -O2 -w -Ithird_party/zlib/include -Ithird_party/minizip-ng/include \
-DHAVE_ZLIB -DZLIB_COMPAT -DHAVE_UNISTD_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
UNRAR7_CXX_FLAGS := -O2 -w -std=c++17 -DRARDLL -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
# prospero-clang++ defaults to -stdlib=libc++; state it explicitly for clarity.
UNRAR7_CXX_FLAGS_PS5 := $(UNRAR7_CXX_FLAGS) -stdlib=libc++
UNRAR7_CXX_FLAGS_HOST:= $(UNRAR7_CXX_FLAGS)
PS5_TP_OBJS := $(patsubst %.c,ps5-obj/%.o,$(THIRD_PARTY_C_SRCS)) \
$(patsubst %.cpp,ps5-obj/%.o,$(UNRAR7_SRCS))
LINUX_TP_OBJS := $(patsubst %.c,linux-obj/%.o,$(THIRD_PARTY_C_SRCS)) \
$(patsubst %.cpp,linux-obj/%.o,$(UNRAR7_SRCS))
CFLAGS := -Oz -fno-asynchronous-unwind-tables -fno-unwind-tables -Wall -Werror -ffunction-sections -fdata-sections -Isrc -Ithird_party/minizip-ng/include -Ithird_party/unrar7 -DVERSION_TAG=\"$(VERSION_TAG)\" -DTITLE_ID=\"$(TITLE_ID)\"
CFLAGS += `$(PKG_CONFIG) libmicrohttpd --cflags`
LDFLAGS := -Wl,--gc-sections
LDADD := `$(PKG_CONFIG) libmicrohttpd --libs`
LDADD += -lSceIpmi -lSceAppInstUtil -lSceUserService
LINUX_CFLAGS := -O2 -flto -Wall -Werror -Isrc -Ithird_party/minizip-ng/include -DVERSION_TAG=\"$(VERSION_TAG)\" -DTITLE_ID=\"$(TITLE_ID)\"
LINUX_CFLAGS := -O2 -flto -Wall -Werror -Isrc -Ithird_party/minizip-ng/include -Ithird_party/unrar7 -DVERSION_TAG=\"$(VERSION_TAG)\" -DTITLE_ID=\"$(TITLE_ID)\"
LINUX_CFLAGS += `$(HOST_PKG_CONFIG) libmicrohttpd --cflags`
LINUX_LDADD := `$(HOST_PKG_CONFIG) libmicrohttpd --libs` -pthread
@@ -78,16 +113,26 @@ gen/%.c: assets/% gen-asset-module.py | gen
ps5-obj/%.o: %.c
@mkdir -p $(dir $@)
$(CC) $(THIRD_PARTY_CFLAGS) -c -o $@ $<
$(CC) $(THIRD_PARTY_C_FLAGS) -c -o $@ $<
linux-obj/%.o: %.c
@mkdir -p $(dir $@)
$(HOST_CC) $(THIRD_PARTY_CFLAGS) -c -o $@ $<
$(HOST_CC) $(THIRD_PARTY_C_FLAGS) -c -o $@ $<
ps5-obj/%.o: %.cpp
@mkdir -p $(dir $@)
$(CXX) $(UNRAR7_CXX_FLAGS_PS5) -c -o $@ $<
linux-obj/%.o: %.cpp
@mkdir -p $(dir $@)
$(HOST_CXX) $(UNRAR7_CXX_FLAGS_HOST) -c -o $@ $<
# Link with the C++ driver so libc++ (PS5) / libstdc++ (host) is pulled in
# automatically for the unrar objects.
$(BIN): $(PS5_SRCS) $(GEN_SRCS) $(PS5_TP_OBJS)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(filter %.c,$^) $(PS5_TP_OBJS) $(LDADD)
$(CXX) $(CFLAGS) $(LDFLAGS) -o $@ $(filter %.c,$^) $(PS5_TP_OBJS) $(LDADD)
$(STRIP) $@
$(LINUX_BIN): $(LINUX_SRCS) $(GEN_SRCS) $(LINUX_TP_OBJS)
$(HOST_CC) $(LINUX_CFLAGS) -o $@ $(filter %.c,$^) $(LINUX_TP_OBJS) $(LINUX_LDADD)
$(HOST_CXX) $(LINUX_CFLAGS) -o $@ $(filter %.c,$^) $(LINUX_TP_OBJS) $(LINUX_LDADD)
$(HOST_STRIP) $@
+171 -361
View File
@@ -1,18 +1,26 @@
/* Safe RAR extraction engine used by the /api/extract task.
Wraps the vendored dmc_unrar library (https://github.com/DrMcCoy/dmc_unrar).
Wraps the vendored rarlab UnRAR 7.x library (third_party/unrar7) through
its C-compatible DLL API (dll.hpp / unrar_c_api.h facade).
The publish / staging / rollback / normalize-name / dedup machinery is
mirrored from zip_extract.c so that any consumer of zipx_result_t gets a
consistent error and progress contract regardless of archive format.
See third_party/unrar/VENDORED.md for what dmc_unrar does and does not
support (single-volume RAR only; multi-volume and encrypted are
rejected up front). */
Backend notes (v1.9, unrar 7.20.1):
* RAR4 and RAR5 (any compression version, incl. WinRAR 6/7 "v6")
single-volume archives.
* Multi-volume archives: unrar auto-merges subsequent volumes by name
pattern when all .partNN.rar files sit next to the opened volume.
* Encrypted RAR: the engine can decrypt via RARSetPassword, but the
password plumbing (API + UI) is not wired yet — encrypted archives
currently fail with ZIPX_ERR_UNSUPPORTED.
See third_party/unrar7/VENDORED.md for the full integration notes. */
#include "rar_extract.h"
#include "zip_extract.h" /* for the shared status / progress / limits API */
#include "dmc_unrar_api.h" /* facade — links against dmc_unrar.o at build time */
#include "unrar_c_api.h" /* facade — links against the unrar7 static lib at build time */
#include <dirent.h>
#include <errno.h>
@@ -28,11 +36,11 @@
#include <time.h>
#include <unistd.h>
/* (intentionally no `#include "dmc_unrar.c"` here — that would pull the
library into this translation unit, where the host test build's
tests/posix_compat.h renames `open` / `close` to `wfm_open` / `wfm_close`
and breaks dmc_unrar's `dmc_unrar_io_handler` struct member access.
dmc_unrar.c is compiled as its own translation unit and joined at link.) */
/* (intentionally no `#include "rar.hpp"` etc. here — those are C++ headers.
rar_extract.c talks to unrar exclusively through the extern "C" DLL API in
dll.hpp, and the unrar sources are compiled as their own translation units
(RARDLL mode) and joined at link time. This keeps the host test build's
tests/posix_compat.h renames (open->wfm_open) from leaking into unrar.) */
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
@@ -288,7 +296,7 @@ nameset_put(rarx_nameset_t *set, uint64_t h, int is_dir) {
/**************************************************************************
* entry name validation (mirrors zip_extract.c::normalize_name but the
* RAR side does not have a trailing separator, so dir entries are only
* detected via dmc_unrar_file_is_directory()).
* detected via the RHDF_DIRECTORY header flag).
**************************************************************************/
static int
@@ -300,7 +308,11 @@ normalize_name(const char *in, char *out, size_t out_size, int *is_dir,
size_t seg_len = 0;
uint32_t levels = 0;
*is_dir = 0;
/* NOTE: is_dir is owned by the caller — unrar announces directories via
the RHDF_DIRECTORY header flag, not via a trailing separator, so we
must NOT clear it here (a stray `*is_dir = 0` previously turned every
directory entry into a file and tripped the duplicate detector when an
explicit directory header followed files beneath it). */
*depth = 0;
if(!in_len) {
return rarx_fail(c, ZIPX_ERR_UNSAFE_NAME, in, "empty entry name");
@@ -422,77 +434,46 @@ nameset_check_duplicate(rarx_nameset_t *set, const char *name, int is_dir,
}
/**************************************************************************
* dmc_unrar -> zipx error translation
* unrar DLL error -> zipx error translation
**************************************************************************/
static int
rar_translate_error(dmc_unrar_return code, const char *detail,
rarx_ctx_t *c) {
rar_translate_error(int code, const char *detail, rarx_ctx_t *c) {
switch(code) {
case DMC_UNRAR_OK:
case ERAR_SUCCESS:
return ZIPX_OK;
/* Archive-open level (the user will see this when they upload a
multi-volume or fully-encrypted RAR — let them know it is on purpose). */
case DMC_UNRAR_ARCHIVE_UNSUPPORTED_VOLUMES:
return rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail,
"multi-volume RAR archives are not supported; "
"please extract on a PC first");
/* The unrar engine handles multi-volume automatically (it merges the
next .partNN.rar by name); a missing next volume surfaces as EOPEN. */
case ERAR_EOPEN:
return rarx_fail(c, ZIPX_ERR_OPEN, detail, "%s", strerror(errno));
case DMC_UNRAR_ARCHIVE_UNSUPPORTED_ENCRYPTED:
return rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail,
"encrypted RAR archives are not supported; "
"please extract on a PC first");
case ERAR_ECREATE:
case ERAR_ECLOSE:
case ERAR_EREAD:
case ERAR_EWRITE:
return rarx_fail(c, ZIPX_ERR_IO, detail, "%s", strerror(errno));
/* Per-file (still surfaced up-front during scan). */
case DMC_UNRAR_FILE_UNSUPPORTED_ENCRYPTED:
case ERAR_MISSING_PASSWORD:
case ERAR_BAD_PASSWORD:
/* Password plumbing (API + UI) is not wired yet. */
return rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail,
"encrypted RAR entries are not supported");
case DMC_UNRAR_FILE_UNSUPPORTED_SPLIT:
return rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail,
"split RAR entries are not supported");
case ERAR_SMALL_BUF:
return rarx_fail(c, ZIPX_ERR_LIMIT_NAME, detail, "name buffer is too small");
case DMC_UNRAR_FILE_UNSUPPORTED_LINK:
return rarx_fail(c, ZIPX_ERR_SPECIAL, detail, "symbolic link entry");
case DMC_UNRAR_FILE_UNSUPPORTED_VERSION:
case DMC_UNRAR_FILE_UNSUPPORTED_METHOD:
return rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail,
"RAR entry uses an unsupported compression method");
case DMC_UNRAR_FILE_UNSUPPORTED_LARGE:
case ERAR_LARGE_DICT:
return rarx_fail(c, ZIPX_ERR_LIMIT_FILE, detail,
"RAR entry is larger than the supported maximum");
"archive needs a larger dictionary than supported");
case DMC_UNRAR_ARCHIVE_EMPTY:
return rarx_fail(c, ZIPX_ERR_FORMAT, detail, "empty RAR archive");
case ERAR_BAD_DATA:
return rarx_fail(c, ZIPX_ERR_CRC, detail, "checksum mismatch in entry data");
case DMC_UNRAR_ARCHIVE_UNSUPPORTED_ANCIENT:
return rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail,
"RAR 1.4 / 1.5 archives are not supported");
case DMC_UNRAR_ARCHIVE_NOT_RAR:
return rarx_fail(c, ZIPX_ERR_FORMAT, detail,
"not a RAR archive");
case DMC_UNRAR_OPEN_FAIL:
return rarx_fail(c, ZIPX_ERR_OPEN, detail, "%s", strerror(errno));
case DMC_UNRAR_READ_FAIL:
case DMC_UNRAR_WRITE_FAIL:
case DMC_UNRAR_SEEK_FAIL:
return rarx_fail(c, ZIPX_ERR_IO, detail, "%s", strerror(errno));
case DMC_UNRAR_FILE_CRC32_FAIL:
return rarx_fail(c, ZIPX_ERR_CRC, detail, "CRC32 mismatch");
case DMC_UNRAR_INVALID_DATA:
case DMC_UNRAR_NO_ALLOC:
case DMC_UNRAR_ALLOC_FAIL:
case DMC_UNRAR_ARCHIVE_IS_NULL:
case DMC_UNRAR_ARCHIVE_NOT_CLEARED:
case DMC_UNRAR_ARCHIVE_MISSING_FIELDS:
case ERAR_BAD_ARCHIVE:
case ERAR_UNKNOWN_FORMAT:
case ERAR_UNKNOWN:
case ERAR_NO_MEMORY:
default:
return rarx_fail(c, ZIPX_ERR_FORMAT, detail,
"invalid or corrupt RAR archive");
@@ -532,15 +513,6 @@ path_parent(const char *path, char *out, size_t out_size) {
return 0;
}
static void
chmod_0777_fd(int fd) {
int err = errno;
if(fchmod(fd, 0777)) {
errno = err;
}
}
static int
make_staging(rarx_ctx_t *c, const char *parent) {
unsigned int attempt;
@@ -617,57 +589,6 @@ rollback_published(rarx_ctx_t *c) {
}
}
/* mkdir -p: ensures every segment below root_fd exists. Returns the open
descriptor for the deepest directory. */
static int
open_parent_dirs(int root_fd, const char *rel, rarx_ctx_t *c) {
char buf[ZIPX_PATH_MAX];
int fd = root_fd;
char *seg;
char *save = NULL;
if(strlen(rel) >= sizeof(buf)) {
rarx_fail(c, ZIPX_ERR_LIMIT_NAME, rel, "path is too long");
return -1;
}
strcpy(buf, rel);
for(seg = strtok_r(buf, "/", &save); seg; seg = strtok_r(NULL, "/", &save)) {
int next;
if(!mkdirat(fd, seg, 0777)) {
next = openat(fd, seg, O_RDONLY | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
if(next >= 0) {
chmod_0777_fd(next);
c->dirs_created++;
}
} else if(errno == EEXIST) {
next = openat(fd, seg, O_RDONLY | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
} else {
rarx_fail(c, ZIPX_ERR_IO, rel, "cannot create directory '%s': %s", seg,
strerror(errno));
if(fd != root_fd) {
close(fd);
}
return -1;
}
if(next < 0) {
rarx_fail(c, ZIPX_ERR_IO, rel, "cannot open directory '%s': %s", seg,
strerror(errno));
if(fd != root_fd) {
close(fd);
}
return -1;
}
if(fd != root_fd) {
close(fd);
}
fd = next;
}
return fd;
}
/**************************************************************************
* scan phase
**************************************************************************/
@@ -695,74 +616,55 @@ check_space(rarx_ctx_t *c, const char *target) {
}
static int
scan_archive(dmc_unrar_archive *rar, rarx_ctx_t *c) {
scan_archive(HANDLE hArc, rarx_ctx_t *c) {
rarx_nameset_t set;
dmc_unrar_size_t i;
dmc_unrar_size_t total;
int ret = 0;
if(nameset_init(&set, 4096)) {
return rarx_fail(c, ZIPX_ERR_INTERNAL, NULL, "out of memory");
}
total = dmc_unrar_get_file_count(rar);
for(i = 0; i < total; i++) {
for(;;) {
struct RARHeaderDataEx hdr;
uint64_t uncomp;
char name[ZIPX_PATH_MAX];
char *name_buf;
dmc_unrar_size_t name_size;
int is_dir;
uint32_t depth = 0;
const dmc_unrar_file *info;
dmc_unrar_return supported;
int rc;
info = dmc_unrar_get_file_stat(rar, i);
if(!info) {
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL, "cannot read entry header");
memset(&hdr, 0, sizeof(hdr));
rc = RARReadHeaderEx(hArc, &hdr);
if(rc == ERAR_END_ARCHIVE) {
break;
}
supported = dmc_unrar_file_is_supported(rar, i);
if(supported != DMC_UNRAR_OK) {
/* is_supported() already returns ZIPX-mapped error via a temporary */
char detail[64];
snprintf(detail, sizeof(detail), "entry %llu",
(unsigned long long)i);
rarx_fail(c, ZIPX_ERR_UNSUPPORTED, detail, "%s",
dmc_unrar_strerror(supported));
ret = (int)c->result->status;
break;
}
is_dir = dmc_unrar_file_is_directory(rar, i) ? 1 : 0;
/* First call to learn the required size, second to fill the buffer. */
name_size = dmc_unrar_get_filename(rar, i, NULL, 0);
if(!name_size) {
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL,
"cannot read entry name");
break;
}
name_buf = malloc(name_size);
if(!name_buf) {
ret = rarx_fail(c, ZIPX_ERR_INTERNAL, NULL, "out of memory");
break;
}
if(dmc_unrar_get_filename(rar, i, name_buf, name_size) != name_size) {
free(name_buf);
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL,
"truncated entry name");
break;
}
/* dmc_unrar does not guarantee NUL termination; force it. */
name_buf[name_size - 1] = 0;
/* RAR stores UTF-8 encoded names. Replace any non-UTF-8 sequence with
'?' to keep the downstream string well-formed. */
dmc_unrar_unicode_make_valid_utf8(name_buf);
if(normalize_name(name_buf, name, sizeof(name), &is_dir, &depth, c)) {
free(name_buf);
if(rc != ERAR_SUCCESS) {
rar_translate_error(rc, NULL, c);
ret = -1;
break;
}
free(name_buf);
/* unrar hands out the header name as a NUL-terminated string
(UTF-8 on the PS5 / POSIX build). */
if(hdr.FileName[0] == 0) {
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL, "empty entry name");
break;
}
is_dir = (hdr.Flags & RHDF_DIRECTORY) ? 1 : 0;
/* Encrypted entries: the unrar engine can decrypt them via RARSetPassword,
but the password plumbing is not wired yet — reject up front with the
same message the v1.8 backend used. */
if(hdr.Flags & RHDF_ENCRYPTED) {
ret = rarx_fail(c, ZIPX_ERR_UNSUPPORTED, hdr.FileName,
"encrypted RAR entries are not supported");
break;
}
if(normalize_name(hdr.FileName, name, sizeof(name), &is_dir, &depth, c)) {
ret = -1;
break;
}
(void)depth;
if(nameset_check_duplicate(&set, name, is_dir, c) ||
nameset_add_path(&set, name, is_dir, c)) {
@@ -771,7 +673,7 @@ scan_archive(dmc_unrar_archive *rar, rarx_ctx_t *c) {
}
if(!is_dir) {
uint64_t uncomp = info->uncompressed_size;
uncomp = (uint64_t)hdr.UnpSizeHigh << 32 | hdr.UnpSize;
if(uncomp > c->limits.max_file_bytes) {
ret = rarx_fail(c, ZIPX_ERR_LIMIT_FILE, name,
@@ -779,8 +681,6 @@ scan_archive(dmc_unrar_archive *rar, rarx_ctx_t *c) {
(unsigned long long)c->limits.max_file_bytes);
break;
}
/* RAR headers do not reliably expose compressed_size for all formats,
so the safe compression-ratio check is skipped. */
if(uncomp >= c->limits.max_total_bytes ||
c->bytes_total > c->limits.max_total_bytes - uncomp) {
ret = rarx_fail(c, ZIPX_ERR_LIMIT_TOTAL, name,
@@ -805,6 +705,17 @@ scan_archive(dmc_unrar_archive *rar, rarx_ctx_t *c) {
}
report(c, ZIPX_PHASE_SCAN, name, 0);
}
/* Advance to the next file header (also drives multi-volume merges). */
rc = RARProcessFile(hArc, RAR_SKIP, NULL, NULL);
if(rc != ERAR_SUCCESS) {
if(rc != ERAR_END_ARCHIVE) {
ret = -1;
rar_translate_error(rc, name, c);
break;
}
break;
}
}
nameset_free(&set);
@@ -815,175 +726,60 @@ scan_archive(dmc_unrar_archive *rar, rarx_ctx_t *c) {
* extract phase
**************************************************************************/
/* dmc_unrar_extract_file_to_path() opens the destination file with fopen()
without creating parent directories. We always call it against an
already-prepared full path inside the staging tree. */
/* unrar extracts each entry directly under the staging root and creates
parent directories itself. All entry names were validated (normalize_name)
during scan, so what lands in the staging tree is safe by construction. */
static int
extract_one(dmc_unrar_archive *rar, rarx_ctx_t *c, int root_fd,
const char *name, dmc_unrar_size_t index, uint64_t declared) {
char *full_path;
char dir_part[ZIPX_PATH_MAX];
char base[ZIPX_PATH_MAX];
char *slash;
int dir_fd;
dmc_unrar_return dr;
struct stat st;
uint64_t before_bytes;
extract_archive(HANDLE hArc, rarx_ctx_t *c) {
int ret = 0;
snprintf(dir_part, sizeof(dir_part), "%s", name);
slash = strrchr(dir_part, '/');
if(slash) {
snprintf(base, sizeof(base), "%s", slash + 1);
*slash = 0;
} else {
snprintf(base, sizeof(base), "%s", name);
dir_part[0] = 0;
}
if(!base[0]) {
return rarx_fail(c, ZIPX_ERR_UNSAFE_NAME, name, "empty file name");
}
dir_fd = open_parent_dirs(root_fd, dir_part, c);
if(dir_fd < 0) {
return -1;
}
full_path = malloc(ZIPX_PATH_MAX);
if(!full_path) {
rarx_fail(c, ZIPX_ERR_INTERNAL, name, "out of memory");
if(dir_fd != root_fd) {
close(dir_fd);
}
return -1;
}
if(dir_part[0]) {
snprintf(full_path, ZIPX_PATH_MAX, "%s/%s/%s",
c->staging, dir_part, base);
} else {
snprintf(full_path, ZIPX_PATH_MAX, "%s/%s", c->staging, base);
}
before_bytes = c->bytes_done;
dr = dmc_unrar_extract_file_to_path(rar, index, full_path, NULL, true);
if(dr != DMC_UNRAR_OK) {
rar_translate_error(dr, name, c);
ret = -1;
goto done;
}
if(stat(full_path, &st)) {
rarx_fail(c, ZIPX_ERR_IO, name, "cannot stat extracted file: %s",
strerror(errno));
ret = -1;
goto done;
}
if((uint64_t)st.st_size > declared + declared + (64 * 1024)) {
/* Defensive: the on-disk size should never wildly exceed the declared
size. The cap is generous so PPMd + headers do not trip it. */
rarx_fail(c, ZIPX_ERR_LIMIT_FILE, name,
"extracted file is larger than declared");
unlink(full_path);
ret = -1;
goto done;
}
if((uint64_t)st.st_size > c->limits.max_total_bytes - c->bytes_done) {
rarx_fail(c, ZIPX_ERR_LIMIT_TOTAL, name,
"archive contents are larger than %llu bytes",
(unsigned long long)c->limits.max_total_bytes);
unlink(full_path);
ret = -1;
goto done;
}
c->bytes_done += (uint64_t)st.st_size;
/* If dmc_unrar did not advance bytes_done above (e.g. declared == 0 for a
directory or zero-byte file), credit the bytes_total estimate so the
progress bar keeps moving. */
if(c->bytes_done == before_bytes && declared) {
c->bytes_done += declared;
}
done:
free(full_path);
if(dir_fd != root_fd) {
close(dir_fd);
}
if(!ret) {
c->files_created++;
}
return ret;
}
static int
extract_archive(dmc_unrar_archive *rar, rarx_ctx_t *c, int root_fd) {
dmc_unrar_size_t i;
dmc_unrar_size_t total = dmc_unrar_get_file_count(rar);
int ret = 0;
for(i = 0; i < total && !ret; i++) {
char *name_buf = NULL;
dmc_unrar_size_t name_size;
char name[ZIPX_PATH_MAX];
for(;;) {
struct RARHeaderDataEx hdr;
int rc;
int is_dir;
uint32_t depth = 0;
const dmc_unrar_file *info;
memset(&hdr, 0, sizeof(hdr));
rc = RARReadHeaderEx(hArc, &hdr);
if(rc == ERAR_END_ARCHIVE) {
break;
}
if(rc != ERAR_SUCCESS) {
rar_translate_error(rc, NULL, c);
ret = -1;
break;
}
if(canceled(c)) {
ret = rarx_fail(c, ZIPX_ERR_CANCELED, NULL, NULL);
break;
}
if(hdr.FileName[0] == 0) {
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL, "empty entry name");
break;
}
if(hdr.Flags & RHDF_ENCRYPTED) {
/* scan already rejected these; defensive only. */
ret = rarx_fail(c, ZIPX_ERR_UNSUPPORTED, hdr.FileName,
"encrypted RAR entries are not supported");
break;
}
info = dmc_unrar_get_file_stat(rar, i);
if(!info) {
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL, "cannot read entry header");
break;
}
is_dir = dmc_unrar_file_is_directory(rar, i) ? 1 : 0;
name_size = dmc_unrar_get_filename(rar, i, NULL, 0);
if(!name_size) {
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL, "cannot read entry name");
break;
}
name_buf = malloc(name_size);
if(!name_buf) {
ret = rarx_fail(c, ZIPX_ERR_INTERNAL, NULL, "out of memory");
break;
}
if(dmc_unrar_get_filename(rar, i, name_buf, name_size) != name_size) {
free(name_buf);
ret = rarx_fail(c, ZIPX_ERR_FORMAT, NULL, "truncated entry name");
break;
}
name_buf[name_size - 1] = 0;
dmc_unrar_unicode_make_valid_utf8(name_buf);
if(normalize_name(name_buf, name, sizeof(name), &is_dir, &depth, c)) {
free(name_buf);
is_dir = (hdr.Flags & RHDF_DIRECTORY) ? 1 : 0;
rc = RARProcessFile(hArc, RAR_EXTRACT, c->staging, NULL);
if(rc != ERAR_SUCCESS) {
rar_translate_error(rc, hdr.FileName, c);
ret = -1;
break;
}
free(name_buf);
(void)depth;
if(is_dir) {
int dir_fd = open_parent_dirs(root_fd, name, c);
if(dir_fd < 0) {
ret = -1;
break;
}
if(dir_fd != root_fd) {
close(dir_fd);
}
c->dirs_created++;
} else {
uint64_t declared = info->uncompressed_size;
if(extract_one(rar, c, root_fd, name, i, declared)) {
ret = -1;
break;
}
c->files_created++;
c->bytes_done += (uint64_t)hdr.UnpSizeHigh << 32 | hdr.UnpSize;
}
c->entries_done++;
report(c, ZIPX_PHASE_EXTRACT, name, 0);
report(c, ZIPX_PHASE_EXTRACT, hdr.FileName, 0);
}
return ret;
}
@@ -1151,9 +947,7 @@ rar_extract(const char *rar_path, const char *dst_dir,
char parent[ZIPX_PATH_MAX];
char dst_copy[ZIPX_PATH_MAX];
struct stat st;
dmc_unrar_archive rar;
dmc_unrar_return dr;
int root_fd = -1;
HANDLE hArc = NULL;
int dst_existed = 0;
int status;
@@ -1197,50 +991,67 @@ rar_extract(const char *rar_path, const char *dst_dir,
goto done;
}
dr = dmc_unrar_archive_init(&rar);
if(dr != DMC_UNRAR_OK) {
status = rarx_fail(c, ZIPX_ERR_INTERNAL, rar_path,
"cannot initialize RAR decoder");
goto done;
}
dr = dmc_unrar_archive_open_path(&rar, rar_path);
if(dr != DMC_UNRAR_OK) {
status = rar_translate_error(dr, rar_path, c);
goto done;
/* Open with RAR_OM_EXTRACT for both passes: the unrar engine drives
multi-volume merges identically while scanning (skip) and extracting,
and encrypted headers surface here as a missing/bad password. */
{
struct RAROpenArchiveDataEx od;
memset(&od, 0, sizeof(od));
od.ArcName = (char *)rar_path;
od.OpenMode = RAR_OM_EXTRACT;
hArc = RAROpenArchiveEx(&od);
if(!hArc) {
status = rar_translate_error((int)od.OpenResult, rar_path, c);
goto done;
}
}
if(scan_archive(&rar, c)) {
if(scan_archive(hArc, c)) {
status = (int)c->result->status;
RARCloseArchive(hArc);
hArc = NULL;
goto done;
}
if(canceled(c)) {
status = rarx_fail(c, ZIPX_ERR_CANCELED, NULL, NULL);
RARCloseArchive(hArc);
hArc = NULL;
goto done;
}
if(check_space(c, dst_existed ? dst_copy : parent)) {
status = (int)c->result->status;
RARCloseArchive(hArc);
hArc = NULL;
goto done;
}
if(make_staging(c, parent)) {
status = (int)c->result->status;
RARCloseArchive(hArc);
hArc = NULL;
goto done;
}
root_fd = open(c->staging, O_RDONLY | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
if(root_fd < 0) {
status = rarx_fail(c, ZIPX_ERR_IO, c->staging, "cannot open staging: %s",
strerror(errno));
goto done;
/* Pass 2: re-open and extract each entry straight into the staging tree
(unrar creates parent directories itself; names were validated during
scan). The staging root is pre-verified below for fast failure. */
RARCloseArchive(hArc);
hArc = NULL;
{
struct RAROpenArchiveDataEx od;
memset(&od, 0, sizeof(od));
od.ArcName = (char *)rar_path;
od.OpenMode = RAR_OM_EXTRACT;
hArc = RAROpenArchiveEx(&od);
if(!hArc) {
status = rar_translate_error((int)od.OpenResult, rar_path, c);
goto done;
}
}
if(extract_archive(&rar, c, root_fd)) {
if(extract_archive(hArc, c)) {
status = (int)c->result->status;
goto done;
}
if(root_fd >= 0) {
close(root_fd);
root_fd = -1;
}
if(canceled(c)) {
status = rarx_fail(c, ZIPX_ERR_CANCELED, NULL, NULL);
goto done;
@@ -1254,11 +1065,10 @@ rar_extract(const char *rar_path, const char *dst_dir,
status = ZIPX_OK;
done:
if(root_fd >= 0) {
close(root_fd);
if(hArc) {
RARCloseArchive(hArc);
}
cleanup_staging(c);
dmc_unrar_archive_close(&rar);
result->entries_total = c->entries_total;
result->entries_done = c->entries_done;
result->bytes_total = c->bytes_total;
+9 -8
View File
@@ -1,21 +1,22 @@
#pragma once
/* Safe RAR extraction engine used by the /api/extract task.
Wraps the vendored dmc_unrar library (https://github.com/DrMcCoy/dmc_unrar).
Wraps the vendored rarlab UnRAR 7.20.1 (third_party/unrar7) through its
C-compatible DLL API (unrar_c_api.h facade).
Reuses the zip_extract types so the dispatch layer can call either engine
through the same status / limits / progress protocol.
See zip_extract.h for the shared limits, conflict, progress and result types.
Constraints of v1.8 (dmc_unrar 1.7.0 backend):
* Single-volume RAR archives only. Multi-volume (.partNN.rar) archives
are rejected with ZIPX_ERR_UNSUPPORTED — extract them on a PC first.
* Unencrypted RAR only. Encrypted headers / files are rejected with
ZIPX_ERR_UNSUPPORTED. There is no password argument for the same reason.
Backend notes (v1.9, unrar 7.20.1):
* RAR4 and RAR5, any compression version including WinRAR 6/7 "v6".
* Multi-volume: unrar merges next .partNN.rar by name automatically.
* Encrypted RAR is NOT yet supported end-to-end: the engine can decrypt
via RARSetPassword, but password plumbing (API + UI) is unwired, so
encrypted headers/entries fail with ZIPX_ERR_UNSUPPORTED today.
See third_party/unrar/VENDORED.md for the upgrade path to rarlab UnRAR
(which does support both) when / if it becomes worth the C++ integration. */
See third_party/unrar7/VENDORED.md for full integration notes. */
#include "zip_extract.h"
+24 -8
View File
@@ -39,9 +39,19 @@ for src in "$ROOT"/third_party/zlib/src/*.c "$ROOT"/third_party/minizip-ng/src/*
"${MZ_CFLAGS[@]}" "${extra[@]}" -o "$BUILD/$name.o" "$src"
done
# dmc_unrar (single-file; uses stdio fopen by default on non-Windows)
"$CC" -c -O2 -w "${RAR_CFLAGS[@]}" \
-o "$BUILD/dmc_unrar.o" "$ROOT/third_party/unrar/dmc_unrar.c"
# unrar 7.20.1 (RARDLL source set; compiled with the host C++ compiler).
UNRAR7_SRCS="$ROOT/third_party/unrar7"
UNRAR7_CFLAGS=(-O2 -w -std=c++17 -DRARDLL -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE)
CXX="${CXX:-g++}"
for src in \
archive arcread blake2s cmddata consio crc crypt dll encname errhnd extinfo \
extract filcreat file filefn filestr find getbits global hash headers isnt \
largepage match motw options pathfn qopen rar rarpch rarvm rawread rdwrfn \
rijndael rs rs16 scantree secpassword sha1 sha256 smallfn strfn strlist \
system threadpool timefn ui unicode unpack volume; do
"$CXX" -c "${UNRAR7_CFLAGS[@]}" -o "$BUILD/unrar7_$src.o" \
"$UNRAR7_SRCS/$src.cpp" || exit 1
done
COMPAT_INC="$ROOT/tests/compat"
@@ -52,8 +62,8 @@ COMPAT_INC="$ROOT/tests/compat"
-o "$BUILD/zip_extract.o" "$ROOT/src/zip_extract.c"
"$CC" -c -O2 -Wall -Wextra -Wno-unused-parameter \
-I"$ROOT/third_party/minizip-ng/include" -I"$ROOT/src" -I"$COMPAT_INC" \
"${RAR_CFLAGS[@]}" -include "$ROOT/tests/posix_compat.h" \
-I"$ROOT/third_party/minizip-ng/include" -I"$ROOT/third_party/unrar7" -I"$ROOT/src" -I"$COMPAT_INC" \
-include "$ROOT/tests/posix_compat.h" \
-o "$BUILD/rar_extract.o" "$ROOT/src/rar_extract.c"
"$CC" -c -O2 -Wall -Wextra -Wno-unused-parameter -I"$ROOT/src" \
@@ -61,13 +71,15 @@ COMPAT_INC="$ROOT/tests/compat"
-o "$BUILD/test_zip_extract.o" "$ROOT/tests/test_zip_extract.c"
"$CC" -c -O2 -Wall -Wextra -Wno-unused-parameter -I"$ROOT/src" \
-I"$COMPAT_INC" "${RAR_CFLAGS[@]}" -include "$ROOT/tests/posix_compat.h" \
-I"$COMPAT_INC" -include "$ROOT/tests/posix_compat.h" \
-o "$BUILD/test_rar_extract.o" "$ROOT/tests/test_rar_extract.c"
objs=()
rar_objs=()
for obj in "$BUILD"/*.o; do
case "$obj" in
*/zip_extract.o|*/rar_extract.o|*/test_zip_extract.o|*/test_rar_extract.o) continue ;;
*/unrar7_*.o) rar_objs+=("$obj"); continue ;;
esac
objs+=("$obj")
done
@@ -75,9 +87,13 @@ done
"$CC" -O2 -o "$BUILD/test-zip-extract" \
"$BUILD/zip_extract.o" "$BUILD/test_zip_extract.o" "${objs[@]}"
"$CC" -O2 -o "$BUILD/test-rar-extract" \
# The RAR test links the unrar7 objects, so it needs the C++ driver.
# Windows unrar system.cpp references SetSuspendState (PowrProf).
RAR_LIBS=()
[ "$HOST_KIND" = windows ] && RAR_LIBS=(-lpowrprof)
"$CXX" -O2 -o "$BUILD/test-rar-extract" \
"$BUILD/rar_extract.o" "$BUILD/test_rar_extract.o" \
"$BUILD/zip_extract.o" "${objs[@]}"
"$BUILD/zip_extract.o" "${objs[@]}" "${rar_objs[@]}" "${RAR_LIBS[@]}"
"$BUILD/test-zip-extract" "$ROOT/tests/fixtures" "$BUILD/work-zip"
"$BUILD/test-rar-extract" "$ROOT/tests/fixtures" "$BUILD/work-rar"
-339
View File
@@ -1,339 +0,0 @@
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
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the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
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Whether that is true depends on what the Program does.
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You may charge a fee for the physical act of transferring a copy, and
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license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
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It is not the purpose of this section to induce you to infringe any
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such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
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to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
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REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.
-10
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dmc_unrar README
================
dmc_unrar is a dependency-free, single-file FLOSS library for unpacking
and decompressing [RAR](https://en.wikipedia.org/wiki/RAR_(file_format))
archives. dmc_unrar is licensed under the terms of the [GNU General
Public License version 2](https://www.gnu.org/licenses/gpl-2.0.html) (or
later).
Please see dmc_unrar.c for details.
-77
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# Vendored: dmc_unrar 1.7.0
## Source
- Repository: https://github.com/DrMcCoy/dmc_unrar
- Upstream commit: master @ 2026-09-05 (DRMcCoy/dmc_unrar master)
- Author: Sven Hesse (DrMcCoy) <drmccoy@drmccoy.de>
- License: GPL-2.0-or-later (see COPYING in this directory)
We vendor only the implementation source file `dmc_unrar.c` (11598 LOC, ~365 KiB).
The repository does not ship a separate header; the entire API is exposed
inline in the `.c` file (see top-of-file docstrings + `example.c`).
## What is supported
- RAR 1.5 / 2.0 / 2.6 / 2.9 / 3.0 / 3.6 / 4.0 / 5.0 archive formats
- Solid blocks, dictionary sizes up to 4 MiB (RAR4) / 32 MiB (RAR5)
- PPMd decompression (used by RAR 3.0+)
- Archive comments (ASCII / UTF-16LE)
- Encrypted archive/file *detection* (returns an explicit error)
## What is NOT supported (by upstream design)
- **Encrypted RAR files** — `DMC_UNRAR_(ARCHIVE|FILE)_UNSUPPORTED_ENCRYPTED`.
We surface this as `ZIPX_ERR_UNSUPPORTED` in the wrapper. Upstream
intentionally omits decryption to avoid patent complications.
- **Multi-volume (split) RAR archives** — `DMC_UNRAR_ARCHIVE_UNSUPPORTED_VOLUMES`.
We surface this as `ZIPX_ERR_UNSUPPORTED`. dmc_unrar does not chain
`.partNN.rar` siblings; users must join / unrar on a PC first.
- Symbolic links, FIFOs, sockets, devices — `DMC_UNRAR_FILE_UNSUPPORTED_LINK`.
## Why dmc_unrar and not the upstream rarlab UnRAR
The rarlab UnRAR source tree (https://www.rarlab.com/rar/unrarsrc-*.tar.gz,
mirrored at https://github.com/opello/unrar) supports encrypted and
multi-volume archives, but it is a 150-file C++17 codebase with its own
filesystem abstraction, Windows registry probe, and threading pool that
requires `-DRAR_SMP`. Integrating it cleanly into the PS5 toolchain would
need:
1. A separate CXX linker step in the Makefile.
2. Verification that `prospero-clang` (-std=c++17, freestanding) builds it
without libc++ dependencies beyond what `prospero-pkg-config` exposes.
3. A new exit-error contract for the `--strip` toolchain.
4. ~10× the audit surface (every `#include <windows.h>` etc.).
We decided the cost > benefit for v1.8: single-volume RAR is the dominant
PS5 Web File Manager use case (uploading an unzipped payload, dumping a
single .pkg as `.rar` for transfer). Users needing multi-volume /
encrypted RAR are explicitly informed via the web UI error message that
they should extract on a PC first.
## Upgrading to a fuller library (v1.9 plan)
When (if) demand justifies it, the recommended upgrade path is:
1. Vendor `https://github.com/opello/unrar` (a faithful mirror of rarlab's
UnRAR 7.x) into `third_party/unrar/` (replacing dmc_unrar.c).
2. Add a CXX compilation rule in `Makefile`:
```
THIRD_PARTY_CPP_SRCS := $(wildcard third_party/unrar/*.cpp)
PS5_TP_CPP_OBJS := $(patsubst %.cpp,ps5-obj/%.o,$(THIRD_PARTY_CPP_SRCS))
$(BIN): ... $(PS5_TP_CPP_OBJS)
$(CXX) -o $@ ... $(PS5_TP_CPP_OBJS) ...
```
3. Build dmc_unrar-style driver code against the DLL API
(`-DRARDLL`, link via `dll.cpp`). The RAR API entry points
`RAROpenArchiveEx`, `RARReadHeaderEx`, `RARProcessFileW` accept the
password via `RARSetPassword`.
4. Rewrite `src/rar_extract.c` to call the new engine while preserving
the `rar_extract()` signature and the `zipx_status_t` error mapping.
5. Tests in `tests/test_rar_extract.c` should not need to change — only
the engine behind `rar_extract()`.
## Modifications to dmc_unrar.c
None. We pin the upstream file verbatim to keep the upgrade path trivial.
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/* Facade header for dmc_unrar 1.7.0 (vendored at third_party/unrar/dmc_unrar.c).
*
* This file declares only the dmc_unrar entry points that src/rar_extract.c
* actually uses. It exists so that rar_extract.c does NOT have to
* `#include "dmc_unrar.c"` — that would otherwise pull the entire library
* into the same translation unit, where the host test build's
* tests/posix_compat.h renames `open` / `close` to `wfm_open` / `wfm_close`
* and breaks dmc_unrar's `dmc_unrar_io_handler` struct member access.
*
* On the PS5 the build (Makefile) compiles dmc_unrar.c separately into
* `ps5-obj/.../dmc_unrar.o` and links it with the rest. On the host test
* runner, `tests/run-tests.sh` does the same with `dmc_unrar.o` (built
* without the POSIX compat shim) and `rar_extract.o` (built with it). */
#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
/* DMC_UNRAR_SIZE_T and DMC_UNRAR_OFFSET_T are normally typedef'd by
dmc_unrar.c. Mirror them here so consumers do not need to include it. */
#ifndef DMC_UNRAR_SIZE_T
typedef uint64_t dmc_unrar_size_t;
typedef int64_t dmc_unrar_offset_t;
#endif
typedef enum {
DMC_UNRAR_OK = 0,
DMC_UNRAR_NO_ALLOC,
DMC_UNRAR_ALLOC_FAIL,
DMC_UNRAR_OPEN_FAIL,
DMC_UNRAR_READ_FAIL,
DMC_UNRAR_WRITE_FAIL,
DMC_UNRAR_SEEK_FAIL,
DMC_UNRAR_INVALID_DATA,
DMC_UNRAR_ARCHIVE_EMPTY,
DMC_UNRAR_ARCHIVE_IS_NULL,
DMC_UNRAR_ARCHIVE_NOT_CLEARED,
DMC_UNRAR_ARCHIVE_MISSING_FIELDS,
DMC_UNRAR_ARCHIVE_NOT_RAR,
DMC_UNRAR_ARCHIVE_UNSUPPORTED_ANCIENT,
DMC_UNRAR_ARCHIVE_UNSUPPORTED_VOLUMES,
DMC_UNRAR_ARCHIVE_UNSUPPORTED_ENCRYPTED,
DMC_UNRAR_FILE_IS_INVALID,
DMC_UNRAR_FILE_IS_DIRECTORY,
DMC_UNRAR_FILE_SOLID_BROKEN,
DMC_UNRAR_FILE_CRC32_FAIL,
DMC_UNRAR_FILE_UNSUPPORTED_VERSION,
DMC_UNRAR_FILE_UNSUPPORTED_METHOD,
DMC_UNRAR_FILE_UNSUPPORTED_ENCRYPTED,
DMC_UNRAR_FILE_UNSUPPORTED_SPLIT,
DMC_UNRAR_FILE_UNSUPPORTED_LINK,
DMC_UNRAR_FILE_UNSUPPORTED_LARGE
/* Values after DMC_UNRAR_FILE_UNSUPPORTED_LARGE (HUFF_*, PPMD_*, FILTERS_*,
*_DISABLED_FEATURE_*, RAR15/20/30/50 specific codes) are intentionally
omitted — rar_extract.c only translates the codes it knows about and
groups the rest into ZIPX_ERR_FORMAT via the default case. */
} dmc_unrar_return;
typedef enum {
DMC_UNRAR_HOSTOS_DOS = 0,
DMC_UNRAR_HOSTOS_OS2 = 1,
DMC_UNRAR_HOSTOS_WIN32 = 2,
DMC_UNRAR_HOSTOS_UNIX = 3,
DMC_UNRAR_HOSTOS_MACOS = 4,
DMC_UNRAR_HOSTOS_BEOS = 5
} dmc_unrar_host_os;
typedef struct dmc_unrar_file_tag {
uint64_t compressed_size;
uint64_t uncompressed_size;
dmc_unrar_host_os host_os;
bool has_crc;
uint32_t crc;
uint64_t unix_time;
uint64_t attrs;
} dmc_unrar_file;
/* dmc_unrar_archive is an opaque struct in the vendored library. We expose
it here so callers can stack-allocate one and pass &rar to the API. The
field list is *not* required — the dmc_unrar API treats the struct as a
token, but we need a complete type so callers can declare it as a local
variable. The layout is irrelevant because the dmc_unrar API only uses
pointers and the real definition lives inside dmc_unrar.c. */
typedef struct dmc_unrar_archive_tag {
void *alloc;
void *io;
void *internal_state;
} dmc_unrar_archive;
const char *dmc_unrar_strerror(dmc_unrar_return code);
bool dmc_unrar_is_rar_path(const char *path);
dmc_unrar_return dmc_unrar_archive_init(dmc_unrar_archive *archive);
void dmc_unrar_archive_close(dmc_unrar_archive *archive);
dmc_unrar_return dmc_unrar_archive_open_path(dmc_unrar_archive *archive,
const char *path);
dmc_unrar_size_t dmc_unrar_get_file_count(dmc_unrar_archive *archive);
const dmc_unrar_file *dmc_unrar_get_file_stat(dmc_unrar_archive *archive,
dmc_unrar_size_t index);
dmc_unrar_size_t dmc_unrar_get_filename(dmc_unrar_archive *archive,
dmc_unrar_size_t index,
char *filename,
dmc_unrar_size_t filename_size);
bool dmc_unrar_file_is_directory(dmc_unrar_archive *archive,
dmc_unrar_size_t index);
dmc_unrar_return dmc_unrar_file_is_supported(dmc_unrar_archive *archive,
dmc_unrar_size_t index);
bool dmc_unrar_unicode_make_valid_utf8(char *str);
dmc_unrar_return dmc_unrar_extract_file_to_path(dmc_unrar_archive *archive,
dmc_unrar_size_t index,
const char *path,
dmc_unrar_size_t *uncompressed_size,
bool validate_crc);
#ifdef __cplusplus
}
#endif
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@@ -1,239 +0,0 @@
/* dmc_unrar - A dependency-free, single-file FLOSS unrar library
*
* Copyright (c) 2017 by Sven Hesse (DrMcCoy) <drmccoy@drmccoy.de>
*
* dmc_unrar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 2 of
* the License, or (at your option) any later version.
*
* dmc_unrar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* For the full text of the GNU General Public License version 2,
* see <https://www.gnu.org/licenses/gpl-2.0.html>
*/
/* This is a small example program to show how to use dmc_unrar. */
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdio.h>
#include "dmc_unrar.c"
int display_help(const char *name);
int display_error(const char *where, const char *str);
char get_command(const char *param);
const char *get_archive_comment(dmc_unrar_archive *archive);
const char *get_file_comment(dmc_unrar_archive *archive, dmc_unrar_size_t i);
const char *get_filename(dmc_unrar_archive *archive, dmc_unrar_size_t i);
const char *get_filename_no_directory(const char *filename);
int main(int argc, char **argv) {
dmc_unrar_size_t i;
char cmd;
const char *comment = NULL;
dmc_unrar_archive archive;
dmc_unrar_return return_code;
if (argc < 3)
return display_help(argv[0]);
cmd = get_command(argv[1]);
if (cmd == 0)
return display_help(argv[0]);
if (!dmc_unrar_is_rar_path(argv[2]))
return display_help(argv[0]);
return_code = dmc_unrar_archive_init(&archive);
if (return_code != DMC_UNRAR_OK)
return display_error("Clear", dmc_unrar_strerror(return_code));
return_code = dmc_unrar_archive_open_path(&archive, argv[2]);
if (return_code != DMC_UNRAR_OK)
return display_error("Open", dmc_unrar_strerror(return_code));
comment = get_archive_comment(&archive);
if (comment) {
printf(".--- Archive comment:\n");
printf("%s\n", comment);
printf("'---\n\n");
free((char *)comment);
}
for (i = 0; i < dmc_unrar_get_file_count(&archive); i++) {
const char *name = get_filename(&archive, i), *file_comment = NULL;
const dmc_unrar_file *file = dmc_unrar_get_file_stat(&archive, i);
printf("%u/%u: \"%s\" - %llu bytes\n",
(unsigned int)(i+1), (unsigned int)dmc_unrar_get_file_count(&archive),
name ? name : "", file ? (unsigned long long)file->uncompressed_size : (unsigned long long)0);
file_comment = get_file_comment(&archive, i);
if (file_comment) {
printf(".--- File comment:\n");
printf("%s\n", file_comment);
printf("'---\n\n");
free((char *)file_comment);
}
if (cmd == 'e') {
const char *filename = get_filename_no_directory(name);
if (filename && !dmc_unrar_file_is_directory(&archive, i)) {
dmc_unrar_return supported = dmc_unrar_file_is_supported(&archive, i);
if (supported == DMC_UNRAR_OK) {
dmc_unrar_return extracted = dmc_unrar_extract_file_to_path(&archive, i, filename, NULL, true);
if (extracted != DMC_UNRAR_OK)
fprintf(stderr, "Error: %s\n", dmc_unrar_strerror(extracted));
} else
fprintf(stderr, "Not supported: %s\n", dmc_unrar_strerror(supported));
}
}
free((char *)name);
}
dmc_unrar_archive_close(&archive);
return 0;
}
int display_help(const char *name) {
fprintf(stderr, "dmc_unrar - A dependency-free, single-file FLOSS unrar library\n");
fprintf(stderr, "\n");
fprintf(stderr, "Usage: %s <command> <rarfile>\n", name);
fprintf(stderr, "\n");
fprintf(stderr, "Commands:\n");
fprintf(stderr, " l List RAR archive contents\n");
fprintf(stderr, " e Extract RAR archive to current directory\n");
fprintf(stderr, "\n");
return 1;
}
int display_error(const char *where, const char *str) {
fprintf(stderr, "%s failed: %s\n", where, str);
return 1;
}
char get_command(const char *param) {
char cmd;
if (!param || (param[0] == '\0') || (param[1] != '\0'))
return 0;
cmd = param[0];
if ((cmd != 'l') && (cmd != 'e'))
return 0;
return cmd;
}
static const char *convert_comment(uint8_t *data, dmc_unrar_size_t size) {
const dmc_unrar_unicode_encoding encoding = dmc_unrar_unicode_detect_encoding(data, size);
if (encoding == DMC_UNRAR_UNICODE_ENCODING_UTF8) {
data[size] = '\0';
return (const char *)data;
}
if (encoding == DMC_UNRAR_UNICODE_ENCODING_UTF16LE) {
char *utf8_data = NULL;
dmc_unrar_size_t utf8_size = dmc_unrar_unicode_convert_utf16le_to_utf8(data, size, NULL, 0);
if (utf8_size) {
utf8_data = (char *)malloc(utf8_size);
if (utf8_data) {
utf8_size = dmc_unrar_unicode_convert_utf16le_to_utf8(data, size, utf8_data, utf8_size);
if (utf8_size) {
free(data);
return utf8_data;
}
}
}
free(data);
free(utf8_data);
return NULL;
}
free(data);
return NULL;
}
const char *get_archive_comment(dmc_unrar_archive *archive) {
uint8_t *data = NULL;
dmc_unrar_size_t size = dmc_unrar_get_archive_comment(archive, NULL, 0);
if (!size)
return NULL;
data = (uint8_t *)malloc(size + 1);
if (!data)
return NULL;
size = dmc_unrar_get_archive_comment(archive, data, size);
return convert_comment(data, size);
}
const char *get_file_comment(dmc_unrar_archive *archive, dmc_unrar_size_t i) {
uint8_t *data = NULL;
dmc_unrar_size_t size = dmc_unrar_get_file_comment(archive, i, NULL, 0);
if (!size)
return NULL;
data = (uint8_t *)malloc(size + 1);
if (!data)
return NULL;
size = dmc_unrar_get_file_comment(archive, i, data, size);
return convert_comment(data, size);
}
const char *get_filename(dmc_unrar_archive *archive, dmc_unrar_size_t i) {
char *filename = 0;
dmc_unrar_size_t size = dmc_unrar_get_filename(archive, i, NULL, 0);
if (!size)
return NULL;
filename = (char *)malloc(size);
if (!filename)
return NULL;
size = dmc_unrar_get_filename(archive, i, filename, size);
if (!size) {
free(filename);
return NULL;
}
dmc_unrar_unicode_make_valid_utf8(filename);
if (filename[0] == '\0') {
free(filename);
return NULL;
}
return filename;
}
const char *get_filename_no_directory(const char *filename) {
char *p = NULL;
if (!filename)
return NULL;
p = (char *) strrchr(filename, '/');
if (!p)
return filename;
if (p[1] == '\0')
return NULL;
return p + 1;
}