mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
4a59210008
This change improves the way internal APIs are being hidden behind the `COSMO` define. The cosmo.h header will take care of defining that, so that a separate define statement isn't needed. This change also does a lot more to define which APIs are standard, and which belong to Cosmo.
284 lines
11 KiB
C
284 lines
11 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/fmt/conv.h"
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#include "libc/intrin/safemacros.internal.h"
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#include "libc/log/check.h"
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#include "libc/log/log.h"
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#include "libc/mem/gc.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/x/xasprintf.h"
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#include "libc/x/xiso8601.h"
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#include "libc/zip.internal.h"
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#include "tool/decode/lib/asmcodegen.h"
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#include "tool/decode/lib/disassemblehex.h"
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#include "tool/decode/lib/zipnames.h"
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char *FormatDosDate(uint16_t dosdate) {
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return xasprintf("%04u-%02u-%02u", ((dosdate >> 9) & 0b1111111) + 1980,
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(dosdate >> 5) & 0b1111, dosdate & 0b11111);
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}
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char *FormatDosTime(uint16_t dostime) {
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return xasprintf("%02u:%02u:%02u", (dostime >> 11) & 0b11111,
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(dostime >> 5) & 0b111111, (dostime << 1) & 0b111110);
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}
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void ShowGeneralFlag(uint16_t generalflag) {
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puts("\
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/ ┌─utf8\n\
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/ │ ┌─strong encryption\n\
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/ │ │┌─compressed patch data\n\
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/ │ ││ ┌─crc and size go after file content\n\
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/ │ ││ │┌─{normal,max,fast,superfast}\n\
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/ │ ││ ││ ┌─encrypted\n\
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/ rrrr│uuuu││r│├┐│");
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show(".short", format(b1, "0b%016b", generalflag), "generalflag");
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}
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void ShowCompressionMethod(uint16_t compressmethod) {
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show(".short",
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firstnonnull(findnamebyid(kZipCompressionNames, compressmethod),
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format(b1, "%hu", compressmethod)),
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"compressionmethod");
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}
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void ShowTimestamp(uint16_t time, uint16_t date) {
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show(".short", format(b1, "%#04hx", time),
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_gc(xasprintf("%s (%s)", "lastmodifiedtime", _gc(FormatDosTime(time)))));
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show(".short", format(b1, "%#04hx", date),
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_gc(xasprintf("%s (%s)", "lastmodifieddate", _gc(FormatDosDate(date)))));
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}
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void ShowNtfs(uint8_t *ntfs, size_t n) {
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struct timespec mtime, atime, ctime;
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mtime = WindowsTimeToTimeSpec(READ64LE(ntfs + 8));
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atime = WindowsTimeToTimeSpec(READ64LE(ntfs + 16));
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ctime = WindowsTimeToTimeSpec(READ64LE(ntfs + 24));
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show(".long", _gc(xasprintf("%d", READ32LE(ntfs))), "ntfs reserved");
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show(".short", _gc(xasprintf("0x%04x", READ16LE(ntfs + 4))),
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"ntfs attribute tag value #1");
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show(".short", _gc(xasprintf("%hu", READ16LE(ntfs + 6))),
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"ntfs attribute tag size");
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show(".quad", _gc(xasprintf("%lu", READ64LE(ntfs + 8))),
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_gc(xasprintf("%s (%s)", "ntfs last modified time",
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_gc(xiso8601(&mtime)))));
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show(".quad", _gc(xasprintf("%lu", READ64LE(ntfs + 16))),
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_gc(xasprintf("%s (%s)", "ntfs last access time",
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_gc(xiso8601(&atime)))));
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show(".quad", _gc(xasprintf("%lu", READ64LE(ntfs + 24))),
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_gc(xasprintf("%s (%s)", "ntfs creation time", _gc(xiso8601(&ctime)))));
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}
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void ShowExtendedTimestamp(uint8_t *p, size_t n, bool islocal) {
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int flag;
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if (n) {
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--n;
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flag = *p++;
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show(".byte", _gc(xasprintf("0b%03hhb", flag)), "fields present in local");
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if ((flag & 1) && n >= 4) {
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show(".long", _gc(xasprintf("%u", READ32LE(p))),
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_gc(xasprintf("%s (%s)", "last modified",
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_gc(xiso8601(&(struct timespec){READ32LE(p)})))));
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p += 4;
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n -= 4;
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}
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flag >>= 1;
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if (islocal) {
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if ((flag & 1) && n >= 4) {
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show(".long", _gc(xasprintf("%u", READ32LE(p))),
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_gc(xasprintf("%s (%s)", "access time",
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_gc(xiso8601(&(struct timespec){READ32LE(p)})))));
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p += 4;
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n -= 4;
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}
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flag >>= 1;
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if ((flag & 1) && n >= 4) {
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show(".long", _gc(xasprintf("%u", READ32LE(p))),
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_gc(xasprintf("%s (%s)", "creation time",
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_gc(xiso8601(&(struct timespec){READ32LE(p)})))));
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p += 4;
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n -= 4;
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}
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}
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}
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}
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void ShowZip64(uint8_t *p, size_t n, bool islocal) {
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if (n >= 8) {
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show(".quad", _gc(xasprintf("%lu", READ64LE(p))),
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_gc(xasprintf("uncompressed size (%,ld)", READ64LE(p))));
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}
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if (n >= 16) {
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show(".quad", _gc(xasprintf("%lu", READ64LE(p + 8))),
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_gc(xasprintf("compressed size (%,ld)", READ64LE(p + 8))));
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}
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if (n >= 24) {
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show(".quad", _gc(xasprintf("%lu", READ64LE(p + 16))),
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_gc(xasprintf("lfile hdr offset (%,ld)", READ64LE(p + 16))));
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}
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if (n >= 28) {
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show(".long", _gc(xasprintf("%u", READ32LE(p + 24))), "disk number");
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}
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}
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void ShowInfoZipNewUnixExtra(uint8_t *p, size_t n, bool islocal) {
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if (p[0] == 1 && p[1] == 4 && p[6] == 4) {
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show(".byte", "1", "version");
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show(".byte", "4", "uid length");
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show(".long", _gc(xasprintf("%u", READ32LE(p + 2))), "uid");
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show(".byte", "4", "gid length");
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show(".long", _gc(xasprintf("%u", READ32LE(p + 7))), "gid");
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} else {
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disassemblehex(p, n, stdout);
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}
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}
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void ShowExtra(uint8_t *extra, bool islocal) {
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switch (ZIP_EXTRA_HEADERID(extra)) {
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case kZipExtraNtfs:
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ShowNtfs(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra));
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break;
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case kZipExtraExtendedTimestamp:
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ShowExtendedTimestamp(ZIP_EXTRA_CONTENT(extra),
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ZIP_EXTRA_CONTENTSIZE(extra), islocal);
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break;
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case kZipExtraZip64:
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ShowZip64(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra),
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islocal);
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break;
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case kZipExtraInfoZipNewUnixExtra:
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ShowInfoZipNewUnixExtra(ZIP_EXTRA_CONTENT(extra),
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ZIP_EXTRA_CONTENTSIZE(extra), islocal);
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break;
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default:
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disassemblehex(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra),
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stdout);
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break;
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}
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}
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void ShowExtras(uint8_t *extras, uint16_t extrassize, bool islocal) {
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int i;
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bool first;
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uint8_t *p, *pe;
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if (extrassize) {
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first = true;
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for (p = extras, pe = extras + extrassize, i = 0; p < pe;
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p += ZIP_EXTRA_SIZE(p), ++i) {
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show(".short",
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firstnonnull(findnamebyid(kZipExtraNames, ZIP_EXTRA_HEADERID(p)),
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_gc(xasprintf("0x%04hx", ZIP_EXTRA_HEADERID(p)))),
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_gc(xasprintf("%s[%d].%s", "extras", i, "headerid")));
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show(".short", _gc(xasprintf("%df-%df", (i + 2) * 10, (i + 1) * 10)),
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_gc(xasprintf("%s[%d].%s (%hd %s)", "extras", i, "contentsize",
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ZIP_EXTRA_CONTENTSIZE(p), "bytes")));
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if (first) {
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first = false;
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printf("%d:", (i + 1) * 10);
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}
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ShowExtra(p, islocal);
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printf("%d:", (i + 2) * 10);
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}
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}
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putchar('\n');
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}
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void ShowLocalFileHeader(uint8_t *lf, uint16_t idx) {
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printf("\n/\t%s #%hu (%zu %s)\n", "local file", idx + 1,
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ZIP_LFILE_HDRSIZE(lf), "bytes");
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show(".ascii", format(b1, "%`'.*s", 4, lf), "magic");
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show(".byte",
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firstnonnull(findnamebyid(kZipEraNames, ZIP_LFILE_VERSIONNEED(lf)),
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_gc(xasprintf("%d", ZIP_LFILE_VERSIONNEED(lf)))),
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"pkzip version need");
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show(".byte",
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firstnonnull(findnamebyid(kZipOsNames, ZIP_LFILE_OSNEED(lf)),
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_gc(xasprintf("%d", ZIP_LFILE_OSNEED(lf)))),
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"os need");
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ShowGeneralFlag(ZIP_LFILE_GENERALFLAG(lf));
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ShowCompressionMethod(ZIP_LFILE_COMPRESSIONMETHOD(lf));
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ShowTimestamp(ZIP_LFILE_LASTMODIFIEDTIME(lf), ZIP_LFILE_LASTMODIFIEDDATE(lf));
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show(
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".long",
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format(b1, "%#x", ZIP_LFILE_CRC32(lf)), _gc(xasprintf("%s (%#x)", "crc32z", GetZipLfileCompressedSize(lf) /* crc32_z(0, ZIP_LFILE_CONTENT(lf), GetZipLfileCompressedSize(lf)) */)));
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if (ZIP_LFILE_COMPRESSEDSIZE(lf) == 0xFFFFFFFF) {
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show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
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} else {
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show(".long", "3f-2f",
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format(b1, "%s (%u %s)", "compressedsize",
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ZIP_LFILE_COMPRESSEDSIZE(lf), "bytes"));
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}
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show(".long",
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ZIP_LFILE_UNCOMPRESSEDSIZE(lf) == 0xFFFFFFFF
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? "0xFFFFFFFF"
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: format(b1, "%u", ZIP_LFILE_UNCOMPRESSEDSIZE(lf)),
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"uncompressedsize");
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show(".short", "1f-0f",
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format(b1, "%s (%hu %s)", "namesize", ZIP_LFILE_NAMESIZE(lf), "bytes"));
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show(
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".short", "2f-1f",
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format(b1, "%s (%hu %s)", "extrasize", ZIP_LFILE_EXTRASIZE(lf), "bytes"));
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printf("0:");
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show(".ascii",
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format(b1, "%`'s",
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_gc(strndup(ZIP_LFILE_NAME(lf), ZIP_LFILE_NAMESIZE(lf)))),
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"name");
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printf("1:");
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ShowExtras(ZIP_LFILE_EXTRA(lf), ZIP_LFILE_EXTRASIZE(lf), true);
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printf("2:");
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disassemblehex(ZIP_LFILE_CONTENT(lf), ZIP_LFILE_COMPRESSEDSIZE(lf), stdout);
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printf("3:\n");
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}
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void DisassembleZip(const char *path, uint8_t *p, size_t n) {
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size_t i, records;
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uint8_t *eocd, *cdir, *cf, *lf;
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CHECK_NOTNULL((eocd = GetZipEocd(p, n, 0)));
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records = GetZipCdirRecords(eocd);
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cdir = p + GetZipCdirOffset(eocd);
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for (i = 0, cf = cdir; i < records; ++i, cf += ZIP_CFILE_HDRSIZE(cf)) {
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CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(cf));
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lf = p + GetZipCfileOffset(cf);
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CHECK_EQ(kZipLfileHdrMagic, ZIP_LFILE_MAGIC(lf));
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ShowLocalFileHeader(lf, i);
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}
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}
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int main(int argc, char *argv[]) {
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int fd;
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uint8_t *map;
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struct stat st;
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ShowCrashReports();
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CHECK_EQ(2, argc);
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CHECK_NE(-1, (fd = open(argv[1], O_RDONLY)));
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CHECK_NE(-1, fstat(fd, &st));
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CHECK_GE(st.st_size, kZipCdirHdrMinSize);
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CHECK_NE(MAP_FAILED,
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(map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)));
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DisassembleZip(argv[1], map, st.st_size);
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CHECK_NE(-1, munmap(map, st.st_size));
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CHECK_NE(-1, close(fd));
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return 0;
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}
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