mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
b0df6c1fce
Cosmopolitan now supports 104 time zones. They're embedded inside any binary that links the localtime() function. Doing so adds about 100kb to the binary size. This change also gets time zones working properly on Windows for the first time. It's not needed to have /etc/localtime exist on Windows, since we can get this information from WIN32. We're also now updated to the latest version of Paul Eggert's TZ library.
615 lines
22 KiB
C
615 lines
22 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
||
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
||
╞══════════════════════════════════════════════════════════════════════════════╡
|
||
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
||
│ │
|
||
│ Permission to use, copy, modify, and/or distribute this software for │
|
||
│ any purpose with or without fee is hereby granted, provided that the │
|
||
│ above copyright notice and this permission notice appear in all copies. │
|
||
│ │
|
||
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
||
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
||
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
||
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
||
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
||
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
||
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
||
│ PERFORMANCE OF THIS SOFTWARE. │
|
||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||
#include "libc/assert.h"
|
||
#include "libc/calls/calls.h"
|
||
#include "libc/calls/struct/stat.h"
|
||
#include "libc/fmt/libgen.h"
|
||
#include "libc/fmt/wintime.internal.h"
|
||
#include "libc/intrin/kprintf.h"
|
||
#include "libc/intrin/safemacros.internal.h"
|
||
#include "libc/log/check.h"
|
||
#include "libc/log/log.h"
|
||
#include "libc/mem/gc.h"
|
||
#include "libc/mem/mem.h"
|
||
#include "libc/nexgen32e/crc32.h"
|
||
#include "libc/nt/struct/filetime.h"
|
||
#include "libc/serialize.h"
|
||
#include "libc/stdckdint.h"
|
||
#include "libc/stdio/stdio.h"
|
||
#include "libc/stdio/sysparam.h"
|
||
#include "libc/str/str.h"
|
||
#include "libc/sysv/consts/map.h"
|
||
#include "libc/sysv/consts/o.h"
|
||
#include "libc/sysv/consts/prot.h"
|
||
#include "libc/time.h"
|
||
#include "libc/x/xasprintf.h"
|
||
#include "libc/zip.internal.h"
|
||
#include "tool/decode/lib/asmcodegen.h"
|
||
#include "tool/decode/lib/disassemblehex.h"
|
||
#include "tool/decode/lib/flagger.h"
|
||
#include "tool/decode/lib/idname.h"
|
||
#include "tool/decode/lib/ntfileflagnames.h"
|
||
#include "tool/decode/lib/titlegen.h"
|
||
#include "tool/decode/lib/zipnames.h"
|
||
|
||
/**
|
||
* @fileoverview Zip File Disassembler.
|
||
*/
|
||
|
||
uint8_t *map;
|
||
|
||
static __wur char *FormatDosDate(uint16_t dosdate) {
|
||
return xasprintf("%04u-%02u-%02u", ((dosdate >> 9) & 0b1111111) + 1980,
|
||
(dosdate >> 5) & 0b1111, dosdate & 0b11111);
|
||
}
|
||
|
||
static __wur char *FormatDosTime(uint16_t dostime) {
|
||
return xasprintf("%02u:%02u:%02u", (dostime >> 11) & 0b11111,
|
||
(dostime >> 5) & 0b111111, (dostime << 1) & 0b111110);
|
||
}
|
||
|
||
char *xiso8601(struct timespec ts) {
|
||
struct tm tm;
|
||
if (!localtime_r(&ts.tv_sec, &tm))
|
||
return 0;
|
||
int len = 128;
|
||
char *res = malloc(len);
|
||
char *ptr = res;
|
||
char *end = res + len;
|
||
if (!res)
|
||
return 0;
|
||
ptr += strftime(ptr, end - ptr, "%Y-%m-%dT%H:%M:%S", &tm);
|
||
ptr += snprintf(ptr, end - ptr, "%09ld", ts.tv_nsec);
|
||
ptr += strftime(ptr, end - ptr, "%z", &tm);
|
||
unassert(ptr + 1 <= end);
|
||
unassert(realloc_in_place(res, ptr - end) == res);
|
||
return res;
|
||
}
|
||
|
||
void AdvancePosition(uint8_t *map, size_t *pos, size_t off) {
|
||
if (off > *pos) {
|
||
/* printf("\n/\t<%s>\n", "LIMBO"); */
|
||
/* disassemblehex(&map[*pos], off - *pos, stdout); */
|
||
/* printf("/\t</%s>\n", "LIMBO"); */
|
||
}
|
||
*pos = off;
|
||
}
|
||
|
||
void ShowGeneralFlag(uint16_t generalflag) {
|
||
puts("\
|
||
/ ┌─utf8\n\
|
||
/ │ ┌─strong encryption\n\
|
||
/ │ │┌─compressed patch data\n\
|
||
/ │ ││ ┌─crc and size go after file content\n\
|
||
/ │ ││ │┌─{normal,max,fast,superfast}\n\
|
||
/ │ ││ ││ ┌─encrypted\n\
|
||
/ rrrr│uuuu││r│├┐│");
|
||
show(".short", format(b1, "0b%016b", generalflag), "generalflag");
|
||
}
|
||
|
||
void ShowTimestamp(uint16_t time, uint16_t date) {
|
||
show(".short", format(b1, "%#04hx", time),
|
||
gc(xasprintf("%s (%s)", "lastmodifiedtime", gc(FormatDosTime(time)))));
|
||
show(".short", format(b1, "%#04hx", date),
|
||
gc(xasprintf("%s (%s)", "lastmodifieddate", gc(FormatDosDate(date)))));
|
||
}
|
||
|
||
void ShowCompressionMethod(uint16_t compressmethod) {
|
||
show(".short",
|
||
firstnonnull(findnamebyid(kZipCompressionNames, compressmethod),
|
||
format(b1, "%hu", compressmethod)),
|
||
"compressionmethod");
|
||
}
|
||
|
||
void ShowNtfs(uint8_t *ntfs, size_t n) {
|
||
struct timespec mtime, atime, ctime;
|
||
mtime = WindowsTimeToTimeSpec(READ64LE(ntfs + 8));
|
||
atime = WindowsTimeToTimeSpec(READ64LE(ntfs + 16));
|
||
ctime = WindowsTimeToTimeSpec(READ64LE(ntfs + 24));
|
||
show(".long", gc(xasprintf("%d", READ32LE(ntfs))), "ntfs reserved");
|
||
show(".short", gc(xasprintf("0x%04x", READ16LE(ntfs + 4))),
|
||
"ntfs attribute tag value #1");
|
||
show(".short", gc(xasprintf("%hu", READ16LE(ntfs + 6))),
|
||
"ntfs attribute tag size");
|
||
show(
|
||
".quad", gc(xasprintf("%lu", READ64LE(ntfs + 8))),
|
||
gc(xasprintf("%s (%s)", "ntfs last modified time", gc(xiso8601(mtime)))));
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(ntfs + 16))),
|
||
gc(xasprintf("%s (%s)", "ntfs last access time", gc(xiso8601(atime)))));
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(ntfs + 24))),
|
||
gc(xasprintf("%s (%s)", "ntfs creation time", gc(xiso8601(ctime)))));
|
||
}
|
||
|
||
void ShowExtendedTimestamp(uint8_t *p, size_t n, bool islocal) {
|
||
int flag;
|
||
if (n) {
|
||
--n;
|
||
flag = *p++;
|
||
show(".byte", gc(xasprintf("0b%03hhb", flag)), "fields present in local");
|
||
if ((flag & 1) && n >= 4) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p))),
|
||
gc(xasprintf("%s (%s)", "last modified",
|
||
gc(xiso8601((struct timespec){READ32LE(p)})))));
|
||
p += 4;
|
||
n -= 4;
|
||
}
|
||
flag >>= 1;
|
||
if (islocal) {
|
||
if ((flag & 1) && n >= 4) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p))),
|
||
gc(xasprintf("%s (%s)", "access time",
|
||
gc(xiso8601((struct timespec){READ32LE(p)})))));
|
||
p += 4;
|
||
n -= 4;
|
||
}
|
||
flag >>= 1;
|
||
if ((flag & 1) && n >= 4) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p))),
|
||
gc(xasprintf("%s (%s)", "creation time",
|
||
gc(xiso8601((struct timespec){READ32LE(p)})))));
|
||
p += 4;
|
||
n -= 4;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void ShowZip64(uint8_t *lf, uint8_t *p, size_t n, bool islocal) {
|
||
int i = 0;
|
||
|
||
uint32_t uncompsize;
|
||
if (islocal) {
|
||
uncompsize = ZIP_LFILE_UNCOMPRESSEDSIZE(lf);
|
||
} else {
|
||
uncompsize = ZIP_CFILE_UNCOMPRESSEDSIZE(lf);
|
||
}
|
||
if (uncompsize == 0xffffffffu) {
|
||
if (i + 8 <= n) {
|
||
show(".quad", gc(xasprintf("0x%lx", READ64LE(p + i))),
|
||
gc(xasprintf("uncompressed size (%,ld)", READ64LE(p + i))));
|
||
} else {
|
||
kprintf("/\tWARNING: ZIP64 EXTRA MISSING UNCOMPRESSED SIZE\n");
|
||
}
|
||
i += 8;
|
||
}
|
||
|
||
uint32_t compsize;
|
||
if (islocal) {
|
||
compsize = ZIP_LFILE_COMPRESSEDSIZE(lf);
|
||
} else {
|
||
compsize = ZIP_CFILE_COMPRESSEDSIZE(lf);
|
||
}
|
||
if (compsize == 0xffffffffu) {
|
||
if (i + 8 <= n) {
|
||
show(".quad", gc(xasprintf("0x%lx", READ64LE(p + i))),
|
||
gc(xasprintf("compressed size (%,ld)", READ64LE(p + i))));
|
||
} else {
|
||
kprintf("/\tWARNING: ZIP64 EXTRA MISSING COMPRESSED SIZE\n");
|
||
}
|
||
i += 8;
|
||
}
|
||
|
||
if (!islocal) {
|
||
uint32_t offset;
|
||
offset = ZIP_CFILE_OFFSET(lf);
|
||
if (offset == 0xffffffffu) {
|
||
if (i + 8 <= n) {
|
||
show(".quad", gc(xasprintf("0x%lx", READ64LE(p + i))),
|
||
gc(xasprintf("lfile offset (%,ld)", READ64LE(p + i))));
|
||
} else {
|
||
kprintf("/\tWARNING: ZIP64 EXTRA MISSING OFFSET\n");
|
||
}
|
||
i += 8;
|
||
}
|
||
}
|
||
|
||
if (!islocal) {
|
||
uint16_t disk;
|
||
disk = ZIP_CFILE_DISK(lf);
|
||
if (disk == 0xffff) {
|
||
if (i + 4 <= n) {
|
||
show(".long", gc(xasprintf("0x%x", READ32LE(p + i))),
|
||
gc(xasprintf("lfile disk (%,ld)", READ32LE(p + i))));
|
||
} else {
|
||
kprintf("/\tWARNING: ZIP64 EXTRA MISSING DISK\n");
|
||
}
|
||
i += 8;
|
||
}
|
||
}
|
||
|
||
if (i != n) {
|
||
kprintf("/\tWARNING: ZIP64 EXTRA HAS SUPERFLUOUS CONTENT\n");
|
||
}
|
||
}
|
||
|
||
void ShowInfoZipNewUnixExtra(uint8_t *p, size_t n, bool islocal) {
|
||
if (p[0] == 1 && p[1] == 4 && p[6] == 4) {
|
||
show(".byte", "1", "version");
|
||
show(".byte", "4", "uid length");
|
||
show(".long", gc(xasprintf("%u", READ32LE(p + 2))), "uid");
|
||
show(".byte", "4", "gid length");
|
||
show(".long", gc(xasprintf("%u", READ32LE(p + 7))), "gid");
|
||
} else {
|
||
disassemblehex(p, n, stdout);
|
||
}
|
||
}
|
||
|
||
void ShowExtra(uint8_t *lf, uint8_t *extra, bool islocal) {
|
||
switch (ZIP_EXTRA_HEADERID(extra)) {
|
||
case kZipExtraNtfs:
|
||
ShowNtfs(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra));
|
||
break;
|
||
case kZipExtraExtendedTimestamp:
|
||
ShowExtendedTimestamp(ZIP_EXTRA_CONTENT(extra),
|
||
ZIP_EXTRA_CONTENTSIZE(extra), islocal);
|
||
break;
|
||
case kZipExtraZip64:
|
||
ShowZip64(lf, ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra),
|
||
islocal);
|
||
break;
|
||
case kZipExtraInfoZipNewUnixExtra:
|
||
ShowInfoZipNewUnixExtra(ZIP_EXTRA_CONTENT(extra),
|
||
ZIP_EXTRA_CONTENTSIZE(extra), islocal);
|
||
break;
|
||
default:
|
||
disassemblehex(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra),
|
||
stdout);
|
||
break;
|
||
}
|
||
}
|
||
|
||
void ShowExternalAttributes(uint8_t *cf) {
|
||
uint32_t ea;
|
||
ea = ZIP_CFILE_EXTERNALATTRIBUTES(cf);
|
||
if (ZIP_CFILE_FILEATTRCOMPAT(cf) == kZipOsUnix) {
|
||
show(".short", RecreateFlags(kNtFileFlagNames, ea & 0xffff),
|
||
"dos file flags");
|
||
show(".short", format(b1, "%#o", ea >> 16), "st_mode");
|
||
} else {
|
||
show(".long", RecreateFlags(kNtFileFlagNames, ea), "externalattributes");
|
||
}
|
||
}
|
||
|
||
void ShowExtras(uint8_t *lf, uint8_t *extras, uint16_t extrassize,
|
||
bool islocal) {
|
||
int i;
|
||
bool first;
|
||
uint8_t *p, *pe;
|
||
if (extrassize) {
|
||
first = true;
|
||
for (p = extras, pe = extras + extrassize, i = 0; p < pe;
|
||
p += ZIP_EXTRA_SIZE(p), ++i) {
|
||
show(".short",
|
||
firstnonnull(findnamebyid(kZipExtraNames, ZIP_EXTRA_HEADERID(p)),
|
||
gc(xasprintf("0x%04hx", ZIP_EXTRA_HEADERID(p)))),
|
||
gc(xasprintf("%s[%d].%s", "extras", i, "headerid")));
|
||
show(".short", gc(xasprintf("%df-%df", (i + 2) * 10, (i + 1) * 10)),
|
||
gc(xasprintf("%s[%d].%s (%hd %s)", "extras", i, "contentsize",
|
||
ZIP_EXTRA_CONTENTSIZE(p), "bytes")));
|
||
if (first) {
|
||
first = false;
|
||
printf("%d:", (i + 1) * 10);
|
||
}
|
||
ShowExtra(lf, p, islocal);
|
||
printf("%d:", (i + 2) * 10);
|
||
}
|
||
}
|
||
putchar('\n');
|
||
}
|
||
|
||
void ShowLocalFileHeader(uint8_t *lf, uint16_t idx) {
|
||
printf("\n/\t%s #%hu (%zu %s @ %#lx)\n", "local file", idx + 1,
|
||
ZIP_LFILE_HDRSIZE(lf), "bytes", lf - map);
|
||
show(".ascii", format(b1, "%`'.*s", 4, lf), "magic");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipEraNames, ZIP_LFILE_VERSIONNEED(lf)),
|
||
gc(xasprintf("%d", ZIP_LFILE_VERSIONNEED(lf)))),
|
||
"pkzip version need");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipOsNames, ZIP_LFILE_OSNEED(lf)),
|
||
gc(xasprintf("%d", ZIP_LFILE_OSNEED(lf)))),
|
||
"os need");
|
||
ShowGeneralFlag(ZIP_LFILE_GENERALFLAG(lf));
|
||
ShowCompressionMethod(ZIP_LFILE_COMPRESSIONMETHOD(lf));
|
||
ShowTimestamp(ZIP_LFILE_LASTMODIFIEDTIME(lf), ZIP_LFILE_LASTMODIFIEDDATE(lf));
|
||
show(
|
||
".long",
|
||
format(b1, "%#x", ZIP_LFILE_CRC32(lf)), gc(xasprintf("%s (%#x)", "crc32z", GetZipLfileCompressedSize(lf) /* crc32_z(0, ZIP_LFILE_CONTENT(lf), GetZipLfileCompressedSize(lf)) */)));
|
||
if (ZIP_LFILE_COMPRESSEDSIZE(lf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
|
||
} else {
|
||
show(".long", "3f-2f",
|
||
format(b1, "%s (%u %s)", "compressedsize",
|
||
ZIP_LFILE_COMPRESSEDSIZE(lf), "bytes"));
|
||
}
|
||
show(".long",
|
||
ZIP_LFILE_UNCOMPRESSEDSIZE(lf) == 0xFFFFFFFF
|
||
? "0xFFFFFFFF"
|
||
: format(b1, "%u", ZIP_LFILE_UNCOMPRESSEDSIZE(lf)),
|
||
"uncompressedsize");
|
||
show(".short", "1f-0f",
|
||
format(b1, "%s (%hu %s)", "namesize", ZIP_LFILE_NAMESIZE(lf), "bytes"));
|
||
show(
|
||
".short", "2f-1f",
|
||
format(b1, "%s (%hu %s)", "extrasize", ZIP_LFILE_EXTRASIZE(lf), "bytes"));
|
||
printf("0:");
|
||
show(".ascii",
|
||
format(b1, "%`'s",
|
||
gc(strndup(ZIP_LFILE_NAME(lf), ZIP_LFILE_NAMESIZE(lf)))),
|
||
"name");
|
||
printf("1:");
|
||
ShowExtras(lf, ZIP_LFILE_EXTRA(lf), ZIP_LFILE_EXTRASIZE(lf), true);
|
||
printf("2:");
|
||
/* disassemblehex(ZIP_LFILE_CONTENT(lf), ZIP_LFILE_COMPRESSEDSIZE(lf),
|
||
* stdout); */
|
||
printf("3:\n");
|
||
}
|
||
|
||
void ShowCentralFileHeader(uint8_t *cf) {
|
||
printf("\n/\t%s (%zu %s @ %#lx)\n", "central directory file header",
|
||
ZIP_CFILE_HDRSIZE(cf), "bytes", cf - map);
|
||
show(".ascii", format(b1, "%`'.*s", 4, cf), "magic");
|
||
show(".byte", gc(xasprintf("%d", ZIP_CFILE_VERSIONMADE(cf))),
|
||
"zip version made");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipOsNames, ZIP_CFILE_FILEATTRCOMPAT(cf)),
|
||
gc(xasprintf("%d", ZIP_CFILE_FILEATTRCOMPAT(cf)))),
|
||
"file attr compat");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipEraNames, ZIP_CFILE_VERSIONNEED(cf)),
|
||
gc(xasprintf("%d", ZIP_CFILE_VERSIONNEED(cf)))),
|
||
"pkzip version need");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipOsNames, ZIP_CFILE_OSNEED(cf)),
|
||
gc(xasprintf("%d", ZIP_CFILE_OSNEED(cf)))),
|
||
"os need");
|
||
ShowGeneralFlag(ZIP_CFILE_GENERALFLAG(cf));
|
||
ShowCompressionMethod(ZIP_CFILE_COMPRESSIONMETHOD(cf));
|
||
ShowTimestamp(ZIP_CFILE_LASTMODIFIEDTIME(cf), ZIP_CFILE_LASTMODIFIEDDATE(cf));
|
||
show(".long", format(b1, "%#x", ZIP_CFILE_CRC32(cf)), "crc32z");
|
||
if (ZIP_CFILE_COMPRESSEDSIZE(cf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
|
||
} else {
|
||
show(".long", format(b1, "%u", ZIP_CFILE_COMPRESSEDSIZE(cf)),
|
||
"compressedsize");
|
||
}
|
||
if (ZIP_CFILE_UNCOMPRESSEDSIZE(cf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
|
||
} else {
|
||
show(".long", format(b1, "%u", ZIP_CFILE_UNCOMPRESSEDSIZE(cf)),
|
||
"uncompressedsize");
|
||
}
|
||
show(".short", "1f-0f",
|
||
format(b1, "%s (%hu %s)", "namesize", ZIP_CFILE_NAMESIZE(cf), "bytes"));
|
||
show(
|
||
".short", "2f-1f",
|
||
format(b1, "%s (%hu %s)", "extrasize", ZIP_CFILE_EXTRASIZE(cf), "bytes"));
|
||
show(".short", "3f-2f",
|
||
format(b1, "%s (%hu %s)", "commentsize", ZIP_CFILE_COMMENTSIZE(cf),
|
||
"bytes"));
|
||
show(".short", format(b1, "%hu", ZIP_CFILE_DISK(cf)), "disk");
|
||
show(".short",
|
||
RecreateFlags(kZipIattrNames, ZIP_CFILE_INTERNALATTRIBUTES(cf) & 1),
|
||
"internalattributes");
|
||
ShowExternalAttributes(cf);
|
||
if (ZIP_CFILE_OFFSET(cf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "lfile hdr offset (zip64)");
|
||
} else {
|
||
show(".long", format(b1, "0x%x", ZIP_CFILE_OFFSET(cf)), "lfile hdr offset");
|
||
}
|
||
printf("0:");
|
||
show(".ascii",
|
||
format(b1, "%`'s",
|
||
gc(strndup(ZIP_CFILE_NAME(cf), ZIP_CFILE_NAMESIZE(cf)))),
|
||
"name");
|
||
printf("1:");
|
||
ShowExtras(cf, ZIP_CFILE_EXTRA(cf), ZIP_CFILE_EXTRASIZE(cf), false);
|
||
printf("2:");
|
||
show(".ascii",
|
||
format(b1, "%`'.*s", ZIP_CFILE_COMMENTSIZE(cf), ZIP_CFILE_COMMENT(cf)),
|
||
"comment");
|
||
printf("3:\n");
|
||
}
|
||
|
||
void ShowCentralDirHeader32(uint8_t *cd) {
|
||
printf("\n/\t%s (%zu %s @ %#lx)\n", "end of central directory header",
|
||
ZIP_CDIR_HDRSIZE(cd), "bytes", cd - map);
|
||
show(".ascii", format(b1, "%`'.*s", 4, cd), "magic");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR_DISK(cd)), "disk");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR_STARTINGDISK(cd)), "startingdisk");
|
||
show(".short", format(b1, "%hu", ZIP_CDIR_RECORDSONDISK(cd)),
|
||
"recordsondisk");
|
||
show(".short", format(b1, "%hu", ZIP_CDIR_RECORDS(cd)), "records");
|
||
show(".long", format(b1, "%u", ZIP_CDIR_SIZE(cd)), "size");
|
||
show(".long", format(b1, "0x%x", ZIP_CDIR_OFFSET(cd)), "cfile hdrs offset");
|
||
show(".short", "1f-0f",
|
||
format(b1, "%s (%hu %s)", "commentsize", ZIP_CDIR_COMMENTSIZE(cd),
|
||
"bytes"));
|
||
printf("0:");
|
||
disassemblehex(ZIP_CDIR_COMMENT(cd), ZIP_CDIR_COMMENTSIZE(cd), stdout);
|
||
printf("1:\n");
|
||
}
|
||
|
||
void ShowCentralDirHeader64(uint8_t *cd) {
|
||
printf("\n/\t%s (%zu %s @ %#lx)\n", "zip64 end of central directory header",
|
||
ZIP_CDIR64_HDRSIZE(cd), "bytes", cd - map);
|
||
show(".ascii", format(b1, "%`'.*s", 4, cd), "magic");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_HDRSIZE(cd) - 12), "hdr size");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR64_VERSIONMADE(cd)), "version made");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR64_VERSIONNEED(cd)), "version need");
|
||
show(".long", format(b1, "%d", ZIP_CDIR64_DISK(cd)), "disk");
|
||
show(".long", format(b1, "%d", ZIP_CDIR64_STARTINGDISK(cd)), "startingdisk");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_RECORDSONDISK(cd)),
|
||
"recordsondisk");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_RECORDS(cd)), "records");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_SIZE(cd)), "cdir size");
|
||
show(".quad", format(b1, "0x%lx", ZIP_CDIR64_OFFSET(cd)), "cdir offset");
|
||
printf("0:");
|
||
disassemblehex(ZIP_CDIR64_COMMENT(cd), ZIP_CDIR64_COMMENTSIZE(cd), stdout);
|
||
printf("1:\n");
|
||
cd += ZIP_CDIR64_HDRSIZE(cd);
|
||
printf("\n/\t%s (%zu %s)\n", "zip64 end of central directory locator",
|
||
kZipCdir64LocatorSize, "bytes");
|
||
show(".ascii", format(b1, "%`'.*s", 4, cd), "magic");
|
||
show(".long", format(b1, "%d", READ32LE(cd + 4)), "startingdisk");
|
||
show(".quad", format(b1, "0x%lx", READ64LE(cd + 4 + 4)), "eocd64 offset");
|
||
show(".long", format(b1, "%d", READ32LE(cd + 4 + 4 + 8)), "totaldisks");
|
||
}
|
||
|
||
int IsZipEocd32(const uint8_t *p, size_t n, size_t i) {
|
||
size_t offset;
|
||
if (i > n || n - i < kZipCdirHdrMinSize) {
|
||
return kZipErrorEocdOffsetOverflow;
|
||
}
|
||
if (READ32LE(p + i) != kZipCdirHdrMagic) {
|
||
return kZipErrorEocdMagicNotFound;
|
||
}
|
||
if (i + ZIP_CDIR_HDRSIZE(p + i) > n) {
|
||
return kZipErrorEocdSizeOverflow;
|
||
}
|
||
if (ZIP_CDIR_DISK(p + i) != ZIP_CDIR_STARTINGDISK(p + i)) {
|
||
return kZipErrorEocdDiskMismatch;
|
||
}
|
||
if (ZIP_CDIR_RECORDSONDISK(p + i) != ZIP_CDIR_RECORDS(p + i)) {
|
||
return kZipErrorEocdRecordsMismatch;
|
||
}
|
||
if (ZIP_CDIR_RECORDS(p + i) * kZipCfileHdrMinSize > ZIP_CDIR_SIZE(p + i)) {
|
||
return kZipErrorEocdRecordsOverflow;
|
||
}
|
||
if (ckd_add(&offset, ZIP_CDIR_OFFSET(p + i), ZIP_CDIR_SIZE(p + i))) {
|
||
return kZipErrorEocdOffsetSizeOverflow;
|
||
}
|
||
if (offset > i) {
|
||
return kZipErrorCdirOffsetPastEocd;
|
||
}
|
||
return kZipOk;
|
||
}
|
||
|
||
uint8_t *GetZipCdir32(const uint8_t *p, size_t n) {
|
||
int64_t i, e, err;
|
||
if (n >= kZipCdirHdrMinSize) {
|
||
i = n - kZipCdirHdrMinSize;
|
||
e = MAX(0, n - 65536);
|
||
for (; i >= e; --i) {
|
||
if (READ32LE(p + i) == kZipCdirHdrMagic) {
|
||
if ((err = IsZipEocd32(p, n, i)) == kZipOk) {
|
||
return (/*unconst*/ uint8_t *)(p + i);
|
||
}
|
||
kprintf("warning: found eocd32 magic at offset 0x%lx that didn't look "
|
||
"like an eocd32 record\n",
|
||
i);
|
||
}
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
uint8_t *GetZipCdir64(const uint8_t *p, size_t n) {
|
||
int64_t e, i, j;
|
||
if (n >= kZipCdir64LocatorSize) {
|
||
i = n - kZipCdir64LocatorSize;
|
||
e = MAX(0, n - 65536);
|
||
for (; i >= e; --i) {
|
||
if (READ32LE(p + i) == kZipCdir64LocatorMagic) {
|
||
if ((j = ZIP_LOCATE64_OFFSET(p + i)) + kZipCdir64HdrMinSize <= n) {
|
||
CHECK_EQ(kZipCdir64HdrMagic, ZIP_CDIR64_MAGIC((uint8_t *)p + j));
|
||
return (uint8_t *)p + j;
|
||
}
|
||
kprintf("warning: found eocd64 locator magic that "
|
||
"didn't look like an eocd64 locator record\n");
|
||
}
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
void DisassembleZip(const char *path, uint8_t *p, size_t n) {
|
||
size_t pos;
|
||
uint16_t i;
|
||
static int records;
|
||
uint8_t *eocd32, *eocd64, *cdir, *cf, *lf;
|
||
eocd32 = GetZipCdir32(p, n);
|
||
eocd64 = GetZipCdir64(p, n);
|
||
CHECK(eocd32 || eocd64);
|
||
pos = 0;
|
||
if (eocd64) {
|
||
records = ZIP_CDIR64_RECORDS(eocd64);
|
||
cdir = p + ZIP_CDIR64_OFFSET(eocd64);
|
||
} else {
|
||
records = ZIP_CDIR_RECORDS(eocd32);
|
||
cdir = p + ZIP_CDIR_OFFSET(eocd32);
|
||
}
|
||
for (i = 0, cf = cdir; i < records; ++i, cf += ZIP_CFILE_HDRSIZE(cf)) {
|
||
lf = p + GetZipCfileOffset(cf);
|
||
CHECK_EQ(kZipLfileHdrMagic, ZIP_LFILE_MAGIC(lf));
|
||
AdvancePosition(p, &pos, lf - p);
|
||
ShowLocalFileHeader(lf, i);
|
||
pos = (lf - p) + ZIP_LFILE_SIZE(lf);
|
||
}
|
||
for (i = 0, cf = cdir; i < records; ++i, cf += ZIP_CFILE_HDRSIZE(cf)) {
|
||
CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(cf));
|
||
AdvancePosition(p, &pos, cf - p);
|
||
ShowCentralFileHeader(cf);
|
||
pos = (cf - p) + ZIP_CFILE_HDRSIZE(cf);
|
||
}
|
||
/* TODO(jart): This is absurd. */
|
||
if (eocd32 && eocd64) {
|
||
if (eocd32 < eocd64) {
|
||
ShowCentralDirHeader32(eocd32);
|
||
AdvancePosition(p, &pos, eocd32 - p);
|
||
ShowCentralDirHeader64(eocd64);
|
||
AdvancePosition(p, &pos, eocd64 - p);
|
||
} else {
|
||
/* pos = eocd64 - p + ZIP_CDIR_HDRSIZE(eocd64); */
|
||
/* AdvancePosition(p, &pos, n); */
|
||
ShowCentralDirHeader64(eocd64);
|
||
AdvancePosition(p, &pos, eocd64 - p);
|
||
/* pos = eocd32 - p + ZIP_CDIR_HDRSIZE(eocd32); */
|
||
/* AdvancePosition(p, &pos, n); */
|
||
ShowCentralDirHeader32(eocd32);
|
||
AdvancePosition(p, &pos, eocd32 - p);
|
||
}
|
||
} else if (eocd32) {
|
||
ShowCentralDirHeader32(eocd32);
|
||
AdvancePosition(p, &pos, eocd32 - p);
|
||
} else {
|
||
ShowCentralDirHeader64(eocd64);
|
||
AdvancePosition(p, &pos, eocd64 - p);
|
||
}
|
||
pos = n;
|
||
AdvancePosition(p, &pos, n);
|
||
}
|
||
|
||
int main(int argc, char *argv[]) {
|
||
int fd;
|
||
struct stat st;
|
||
ShowCrashReports();
|
||
CHECK_EQ(2, argc);
|
||
CHECK_NE(-1, (fd = open(argv[1], O_RDONLY)));
|
||
CHECK_NE(-1, fstat(fd, &st));
|
||
CHECK_GE(st.st_size, kZipCdirHdrMinSize);
|
||
CHECK_NE(MAP_FAILED,
|
||
(map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)));
|
||
showtitle("αcτµαlly pδrταblε εxεcµταblε", "tool/decode/zip",
|
||
basename(argv[1]), NULL, &kModelineAsm);
|
||
DisassembleZip(argv[1], map, st.st_size);
|
||
CHECK_NE(-1, munmap(map, st.st_size));
|
||
CHECK_NE(-1, close(fd));
|
||
return 0;
|
||
}
|