Source file src/archive/zip/reader_test.go

     1  // Copyright 2010 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package zip
     6  
     7  import (
     8  	"bytes"
     9  	"encoding/binary"
    10  	"encoding/hex"
    11  	"errors"
    12  	"fmt"
    13  	"internal/obscuretestdata"
    14  	"io"
    15  	"io/fs"
    16  	"os"
    17  	"path/filepath"
    18  	"regexp"
    19  	"slices"
    20  	"strings"
    21  	"testing"
    22  	"testing/fstest"
    23  	"time"
    24  )
    25  
    26  type ZipTest struct {
    27  	Name     string
    28  	Source   func() (r io.ReaderAt, size int64) // if non-nil, used instead of testdata/<Name> file
    29  	Comment  string
    30  	File     []ZipTestFile
    31  	Obscured bool  // needed for Apple notarization (golang.org/issue/34986)
    32  	Error    error // the error that Opening this file should return
    33  }
    34  
    35  type ZipTestFile struct {
    36  	Name     string
    37  	Mode     fs.FileMode
    38  	NonUTF8  bool
    39  	ModTime  time.Time
    40  	Modified time.Time
    41  
    42  	// Information describing expected zip file content.
    43  	// First, reading the entire content should produce the error ContentErr.
    44  	// Second, if ContentErr==nil, the content should match Content.
    45  	// If content is large, an alternative to setting Content is to set File,
    46  	// which names a file in the testdata/ directory containing the
    47  	// uncompressed expected content.
    48  	// If content is very large, an alternative to setting Content or File
    49  	// is to set Size, which will then be checked against the header-reported size
    50  	// but will bypass the decompressing of the actual data.
    51  	// This last option is used for testing very large (multi-GB) compressed files.
    52  	ContentErr error
    53  	Content    []byte
    54  	File       string
    55  	Size       uint64
    56  }
    57  
    58  var tests = []ZipTest{
    59  	{
    60  		Name:    "test.zip",
    61  		Comment: "This is a zipfile comment.",
    62  		File: []ZipTestFile{
    63  			{
    64  				Name:     "test.txt",
    65  				Content:  []byte("This is a test text file.\n"),
    66  				Modified: time.Date(2010, 9, 5, 12, 12, 1, 0, timeZone(+10*time.Hour)),
    67  				Mode:     0644,
    68  			},
    69  			{
    70  				Name:     "gophercolor16x16.png",
    71  				File:     "gophercolor16x16.png",
    72  				Modified: time.Date(2010, 9, 5, 15, 52, 58, 0, timeZone(+10*time.Hour)),
    73  				Mode:     0644,
    74  			},
    75  		},
    76  	},
    77  	{
    78  		Name:    "test-trailing-junk.zip",
    79  		Comment: "This is a zipfile comment.",
    80  		File: []ZipTestFile{
    81  			{
    82  				Name:     "test.txt",
    83  				Content:  []byte("This is a test text file.\n"),
    84  				Modified: time.Date(2010, 9, 5, 12, 12, 1, 0, timeZone(+10*time.Hour)),
    85  				Mode:     0644,
    86  			},
    87  			{
    88  				Name:     "gophercolor16x16.png",
    89  				File:     "gophercolor16x16.png",
    90  				Modified: time.Date(2010, 9, 5, 15, 52, 58, 0, timeZone(+10*time.Hour)),
    91  				Mode:     0644,
    92  			},
    93  		},
    94  	},
    95  	{
    96  		Name:    "test-prefix.zip",
    97  		Comment: "This is a zipfile comment.",
    98  		File: []ZipTestFile{
    99  			{
   100  				Name:     "test.txt",
   101  				Content:  []byte("This is a test text file.\n"),
   102  				Modified: time.Date(2010, 9, 5, 12, 12, 1, 0, timeZone(+10*time.Hour)),
   103  				Mode:     0644,
   104  			},
   105  			{
   106  				Name:     "gophercolor16x16.png",
   107  				File:     "gophercolor16x16.png",
   108  				Modified: time.Date(2010, 9, 5, 15, 52, 58, 0, timeZone(+10*time.Hour)),
   109  				Mode:     0644,
   110  			},
   111  		},
   112  	},
   113  	{
   114  		Name:    "test-baddirsz.zip",
   115  		Comment: "This is a zipfile comment.",
   116  		File: []ZipTestFile{
   117  			{
   118  				Name:     "test.txt",
   119  				Content:  []byte("This is a test text file.\n"),
   120  				Modified: time.Date(2010, 9, 5, 12, 12, 1, 0, timeZone(+10*time.Hour)),
   121  				Mode:     0644,
   122  			},
   123  			{
   124  				Name:     "gophercolor16x16.png",
   125  				File:     "gophercolor16x16.png",
   126  				Modified: time.Date(2010, 9, 5, 15, 52, 58, 0, timeZone(+10*time.Hour)),
   127  				Mode:     0644,
   128  			},
   129  		},
   130  	},
   131  	{
   132  		Name:    "test-badbase.zip",
   133  		Comment: "This is a zipfile comment.",
   134  		File: []ZipTestFile{
   135  			{
   136  				Name:     "test.txt",
   137  				Content:  []byte("This is a test text file.\n"),
   138  				Modified: time.Date(2010, 9, 5, 12, 12, 1, 0, timeZone(+10*time.Hour)),
   139  				Mode:     0644,
   140  			},
   141  			{
   142  				Name:     "gophercolor16x16.png",
   143  				File:     "gophercolor16x16.png",
   144  				Modified: time.Date(2010, 9, 5, 15, 52, 58, 0, timeZone(+10*time.Hour)),
   145  				Mode:     0644,
   146  			},
   147  		},
   148  	},
   149  	{
   150  		Name:   "r.zip",
   151  		Source: returnRecursiveZip,
   152  		File: []ZipTestFile{
   153  			{
   154  				Name:     "r/r.zip",
   155  				Content:  rZipBytes(),
   156  				Modified: time.Date(2010, 3, 4, 0, 24, 16, 0, time.UTC),
   157  				Mode:     0666,
   158  			},
   159  		},
   160  	},
   161  	{
   162  		Name: "symlink.zip",
   163  		File: []ZipTestFile{
   164  			{
   165  				Name:     "symlink",
   166  				Content:  []byte("../target"),
   167  				Modified: time.Date(2012, 2, 3, 19, 56, 48, 0, timeZone(-2*time.Hour)),
   168  				Mode:     0777 | fs.ModeSymlink,
   169  			},
   170  		},
   171  	},
   172  	{
   173  		Name: "readme.zip",
   174  	},
   175  	{
   176  		Name:  "readme.notzip",
   177  		Error: ErrFormat,
   178  	},
   179  	{
   180  		Name: "dd.zip",
   181  		File: []ZipTestFile{
   182  			{
   183  				Name:     "filename",
   184  				Content:  []byte("This is a test textfile.\n"),
   185  				Modified: time.Date(2011, 2, 2, 13, 6, 20, 0, time.UTC),
   186  				Mode:     0666,
   187  			},
   188  		},
   189  	},
   190  	{
   191  		// created in windows XP file manager.
   192  		Name: "winxp.zip",
   193  		File: []ZipTestFile{
   194  			{
   195  				Name:     "hello",
   196  				Content:  []byte("world \r\n"),
   197  				Modified: time.Date(2011, 12, 8, 10, 4, 24, 0, time.UTC),
   198  				Mode:     0666,
   199  			},
   200  			{
   201  				Name:     "dir/bar",
   202  				Content:  []byte("foo \r\n"),
   203  				Modified: time.Date(2011, 12, 8, 10, 4, 50, 0, time.UTC),
   204  				Mode:     0666,
   205  			},
   206  			{
   207  				Name:     "dir/empty/",
   208  				Content:  []byte{},
   209  				Modified: time.Date(2011, 12, 8, 10, 8, 6, 0, time.UTC),
   210  				Mode:     fs.ModeDir | 0777,
   211  			},
   212  			{
   213  				Name:     "readonly",
   214  				Content:  []byte("important \r\n"),
   215  				Modified: time.Date(2011, 12, 8, 10, 6, 8, 0, time.UTC),
   216  				Mode:     0444,
   217  			},
   218  		},
   219  	},
   220  	{
   221  		// created by Zip 3.0 under Linux
   222  		Name: "unix.zip",
   223  		File: []ZipTestFile{
   224  			{
   225  				Name:     "hello",
   226  				Content:  []byte("world \r\n"),
   227  				Modified: time.Date(2011, 12, 8, 10, 4, 24, 0, timeZone(0)),
   228  				Mode:     0666,
   229  			},
   230  			{
   231  				Name:     "dir/bar",
   232  				Content:  []byte("foo \r\n"),
   233  				Modified: time.Date(2011, 12, 8, 10, 4, 50, 0, timeZone(0)),
   234  				Mode:     0666,
   235  			},
   236  			{
   237  				Name:     "dir/empty/",
   238  				Content:  []byte{},
   239  				Modified: time.Date(2011, 12, 8, 10, 8, 6, 0, timeZone(0)),
   240  				Mode:     fs.ModeDir | 0777,
   241  			},
   242  			{
   243  				Name:     "readonly",
   244  				Content:  []byte("important \r\n"),
   245  				Modified: time.Date(2011, 12, 8, 10, 6, 8, 0, timeZone(0)),
   246  				Mode:     0444,
   247  			},
   248  		},
   249  	},
   250  	{
   251  		// created by Go, before we wrote the "optional" data
   252  		// descriptor signatures (which are required by macOS).
   253  		// Use obscured file to avoid Apple’s notarization service
   254  		// rejecting the toolchain due to an inability to unzip this archive.
   255  		// See golang.org/issue/34986
   256  		Name:     "go-no-datadesc-sig.zip.base64",
   257  		Obscured: true,
   258  		File: []ZipTestFile{
   259  			{
   260  				Name:     "foo.txt",
   261  				Content:  []byte("foo\n"),
   262  				Modified: time.Date(2012, 3, 8, 16, 59, 10, 0, timeZone(-8*time.Hour)),
   263  				Mode:     0644,
   264  			},
   265  			{
   266  				Name:     "bar.txt",
   267  				Content:  []byte("bar\n"),
   268  				Modified: time.Date(2012, 3, 8, 16, 59, 12, 0, timeZone(-8*time.Hour)),
   269  				Mode:     0644,
   270  			},
   271  		},
   272  	},
   273  	{
   274  		// created by Go, after we wrote the "optional" data
   275  		// descriptor signatures (which are required by macOS)
   276  		Name: "go-with-datadesc-sig.zip",
   277  		File: []ZipTestFile{
   278  			{
   279  				Name:     "foo.txt",
   280  				Content:  []byte("foo\n"),
   281  				Modified: time.Date(1979, 11, 30, 0, 0, 0, 0, time.UTC),
   282  				Mode:     0666,
   283  			},
   284  			{
   285  				Name:     "bar.txt",
   286  				Content:  []byte("bar\n"),
   287  				Modified: time.Date(1979, 11, 30, 0, 0, 0, 0, time.UTC),
   288  				Mode:     0666,
   289  			},
   290  		},
   291  	},
   292  	{
   293  		Name:   "Bad-CRC32-in-data-descriptor",
   294  		Source: returnCorruptCRC32Zip,
   295  		File: []ZipTestFile{
   296  			{
   297  				Name:       "foo.txt",
   298  				Content:    []byte("foo\n"),
   299  				Modified:   time.Date(1979, 11, 30, 0, 0, 0, 0, time.UTC),
   300  				Mode:       0666,
   301  				ContentErr: ErrChecksum,
   302  			},
   303  			{
   304  				Name:     "bar.txt",
   305  				Content:  []byte("bar\n"),
   306  				Modified: time.Date(1979, 11, 30, 0, 0, 0, 0, time.UTC),
   307  				Mode:     0666,
   308  			},
   309  		},
   310  	},
   311  	// Tests that we verify (and accept valid) crc32s on files
   312  	// with crc32s in their file header (not in data descriptors)
   313  	{
   314  		Name: "crc32-not-streamed.zip",
   315  		File: []ZipTestFile{
   316  			{
   317  				Name:     "foo.txt",
   318  				Content:  []byte("foo\n"),
   319  				Modified: time.Date(2012, 3, 8, 16, 59, 10, 0, timeZone(-8*time.Hour)),
   320  				Mode:     0644,
   321  			},
   322  			{
   323  				Name:     "bar.txt",
   324  				Content:  []byte("bar\n"),
   325  				Modified: time.Date(2012, 3, 8, 16, 59, 12, 0, timeZone(-8*time.Hour)),
   326  				Mode:     0644,
   327  			},
   328  		},
   329  	},
   330  	// Tests that we verify (and reject invalid) crc32s on files
   331  	// with crc32s in their file header (not in data descriptors)
   332  	{
   333  		Name:   "crc32-not-streamed.zip",
   334  		Source: returnCorruptNotStreamedZip,
   335  		File: []ZipTestFile{
   336  			{
   337  				Name:       "foo.txt",
   338  				Content:    []byte("foo\n"),
   339  				Modified:   time.Date(2012, 3, 8, 16, 59, 10, 0, timeZone(-8*time.Hour)),
   340  				Mode:       0644,
   341  				ContentErr: ErrChecksum,
   342  			},
   343  			{
   344  				Name:     "bar.txt",
   345  				Content:  []byte("bar\n"),
   346  				Modified: time.Date(2012, 3, 8, 16, 59, 12, 0, timeZone(-8*time.Hour)),
   347  				Mode:     0644,
   348  			},
   349  		},
   350  	},
   351  	{
   352  		Name: "zip64.zip",
   353  		File: []ZipTestFile{
   354  			{
   355  				Name:     "README",
   356  				Content:  []byte("This small file is in ZIP64 format.\n"),
   357  				Modified: time.Date(2012, 8, 10, 14, 33, 32, 0, time.UTC),
   358  				Mode:     0644,
   359  			},
   360  		},
   361  	},
   362  	// Another zip64 file with different Extras fields. (golang.org/issue/7069)
   363  	{
   364  		Name: "zip64-2.zip",
   365  		File: []ZipTestFile{
   366  			{
   367  				Name:     "README",
   368  				Content:  []byte("This small file is in ZIP64 format.\n"),
   369  				Modified: time.Date(2012, 8, 10, 14, 33, 32, 0, timeZone(-4*time.Hour)),
   370  				Mode:     0644,
   371  			},
   372  		},
   373  	},
   374  	// Largest possible non-zip64 file, with no zip64 header.
   375  	{
   376  		Name:   "big.zip",
   377  		Source: returnBigZipBytes,
   378  		File: []ZipTestFile{
   379  			{
   380  				Name:     "big.file",
   381  				Content:  nil,
   382  				Size:     1<<32 - 1,
   383  				Modified: time.Date(1979, 11, 30, 0, 0, 0, 0, time.UTC),
   384  				Mode:     0666,
   385  			},
   386  		},
   387  	},
   388  	{
   389  		Name: "utf8-7zip.zip",
   390  		File: []ZipTestFile{
   391  			{
   392  				Name:     "世界",
   393  				Content:  []byte{},
   394  				Mode:     0666,
   395  				Modified: time.Date(2017, 11, 6, 13, 9, 27, 867862500, timeZone(-8*time.Hour)),
   396  			},
   397  		},
   398  	},
   399  	{
   400  		Name: "utf8-infozip.zip",
   401  		File: []ZipTestFile{
   402  			{
   403  				Name:    "世界",
   404  				Content: []byte{},
   405  				Mode:    0644,
   406  				// Name is valid UTF-8, but format does not have UTF-8 flag set.
   407  				// We don't do UTF-8 detection for multi-byte runes due to
   408  				// false-positives with other encodings (e.g., Shift-JIS).
   409  				// Format says encoding is not UTF-8, so we trust it.
   410  				NonUTF8:  true,
   411  				Modified: time.Date(2017, 11, 6, 13, 9, 27, 0, timeZone(-8*time.Hour)),
   412  			},
   413  		},
   414  	},
   415  	{
   416  		Name: "utf8-osx.zip",
   417  		File: []ZipTestFile{
   418  			{
   419  				Name:    "世界",
   420  				Content: []byte{},
   421  				Mode:    0644,
   422  				// Name is valid UTF-8, but format does not have UTF-8 set.
   423  				NonUTF8:  true,
   424  				Modified: time.Date(2017, 11, 6, 13, 9, 27, 0, timeZone(-8*time.Hour)),
   425  			},
   426  		},
   427  	},
   428  	{
   429  		Name: "utf8-winrar.zip",
   430  		File: []ZipTestFile{
   431  			{
   432  				Name:     "世界",
   433  				Content:  []byte{},
   434  				Mode:     0666,
   435  				Modified: time.Date(2017, 11, 6, 13, 9, 27, 867862500, timeZone(-8*time.Hour)),
   436  			},
   437  		},
   438  	},
   439  	{
   440  		Name: "utf8-winzip.zip",
   441  		File: []ZipTestFile{
   442  			{
   443  				Name:     "世界",
   444  				Content:  []byte{},
   445  				Mode:     0666,
   446  				Modified: time.Date(2017, 11, 6, 13, 9, 27, 867000000, timeZone(-8*time.Hour)),
   447  			},
   448  		},
   449  	},
   450  	{
   451  		Name: "time-7zip.zip",
   452  		File: []ZipTestFile{
   453  			{
   454  				Name:     "test.txt",
   455  				Content:  []byte{},
   456  				Size:     1<<32 - 1,
   457  				Modified: time.Date(2017, 10, 31, 21, 11, 57, 244817900, timeZone(-7*time.Hour)),
   458  				Mode:     0666,
   459  			},
   460  		},
   461  	},
   462  	{
   463  		Name: "time-infozip.zip",
   464  		File: []ZipTestFile{
   465  			{
   466  				Name:     "test.txt",
   467  				Content:  []byte{},
   468  				Size:     1<<32 - 1,
   469  				Modified: time.Date(2017, 10, 31, 21, 11, 57, 0, timeZone(-7*time.Hour)),
   470  				Mode:     0644,
   471  			},
   472  		},
   473  	},
   474  	{
   475  		Name: "time-osx.zip",
   476  		File: []ZipTestFile{
   477  			{
   478  				Name:     "test.txt",
   479  				Content:  []byte{},
   480  				Size:     1<<32 - 1,
   481  				Modified: time.Date(2017, 10, 31, 21, 11, 57, 0, timeZone(-7*time.Hour)),
   482  				Mode:     0644,
   483  			},
   484  		},
   485  	},
   486  	{
   487  		Name: "time-win7.zip",
   488  		File: []ZipTestFile{
   489  			{
   490  				Name:     "test.txt",
   491  				Content:  []byte{},
   492  				Size:     1<<32 - 1,
   493  				Modified: time.Date(2017, 10, 31, 21, 11, 58, 0, time.UTC),
   494  				Mode:     0666,
   495  			},
   496  		},
   497  	},
   498  	{
   499  		Name: "time-winrar.zip",
   500  		File: []ZipTestFile{
   501  			{
   502  				Name:     "test.txt",
   503  				Content:  []byte{},
   504  				Size:     1<<32 - 1,
   505  				Modified: time.Date(2017, 10, 31, 21, 11, 57, 244817900, timeZone(-7*time.Hour)),
   506  				Mode:     0666,
   507  			},
   508  		},
   509  	},
   510  	{
   511  		Name: "time-winzip.zip",
   512  		File: []ZipTestFile{
   513  			{
   514  				Name:     "test.txt",
   515  				Content:  []byte{},
   516  				Size:     1<<32 - 1,
   517  				Modified: time.Date(2017, 10, 31, 21, 11, 57, 244000000, timeZone(-7*time.Hour)),
   518  				Mode:     0666,
   519  			},
   520  		},
   521  	},
   522  	{
   523  		Name: "time-go.zip",
   524  		File: []ZipTestFile{
   525  			{
   526  				Name:     "test.txt",
   527  				Content:  []byte{},
   528  				Size:     1<<32 - 1,
   529  				Modified: time.Date(2017, 10, 31, 21, 11, 57, 0, timeZone(-7*time.Hour)),
   530  				Mode:     0666,
   531  			},
   532  		},
   533  	},
   534  	{
   535  		Name: "time-22738.zip",
   536  		File: []ZipTestFile{
   537  			{
   538  				Name:     "file",
   539  				Content:  []byte{},
   540  				Mode:     0666,
   541  				Modified: time.Date(1999, 12, 31, 19, 0, 0, 0, timeZone(-5*time.Hour)),
   542  				ModTime:  time.Date(1999, 12, 31, 19, 0, 0, 0, time.UTC),
   543  			},
   544  		},
   545  	},
   546  	{
   547  		Name: "dupdir.zip",
   548  		File: []ZipTestFile{
   549  			{
   550  				Name:     "a/",
   551  				Content:  []byte{},
   552  				Mode:     fs.ModeDir | 0666,
   553  				Modified: time.Date(2021, 12, 29, 0, 0, 0, 0, timeZone(0)),
   554  			},
   555  			{
   556  				Name:     "a/b",
   557  				Content:  []byte{},
   558  				Mode:     0666,
   559  				Modified: time.Date(2021, 12, 29, 0, 0, 0, 0, timeZone(0)),
   560  			},
   561  			{
   562  				Name:     "a/b/",
   563  				Content:  []byte{},
   564  				Mode:     fs.ModeDir | 0666,
   565  				Modified: time.Date(2021, 12, 29, 0, 0, 0, 0, timeZone(0)),
   566  			},
   567  			{
   568  				Name:     "a/b/c",
   569  				Content:  []byte{},
   570  				Mode:     0666,
   571  				Modified: time.Date(2021, 12, 29, 0, 0, 0, 0, timeZone(0)),
   572  			},
   573  		},
   574  	},
   575  	// Issue 66869: Don't skip over an EOCDR with a truncated comment.
   576  	// The test file sneakily hides a second EOCDR before the first one;
   577  	// previously we would extract one file ("file") from this archive,
   578  	// while most other tools would reject the file or extract a different one ("FILE").
   579  	{
   580  		Name:  "comment-truncated.zip",
   581  		Error: ErrFormat,
   582  	},
   583  }
   584  
   585  func TestReader(t *testing.T) {
   586  	for _, zt := range tests {
   587  		t.Run(zt.Name, func(t *testing.T) {
   588  			readTestZip(t, zt)
   589  		})
   590  	}
   591  }
   592  
   593  func readTestZip(t *testing.T, zt ZipTest) {
   594  	var z *Reader
   595  	var err error
   596  	var raw []byte
   597  	if zt.Source != nil {
   598  		rat, size := zt.Source()
   599  		z, err = NewReader(rat, size)
   600  		raw = make([]byte, size)
   601  		if _, err := rat.ReadAt(raw, 0); err != nil {
   602  			t.Errorf("ReadAt error=%v", err)
   603  			return
   604  		}
   605  	} else {
   606  		path := filepath.Join("testdata", zt.Name)
   607  		if zt.Obscured {
   608  			tf, err := obscuretestdata.DecodeToTempFile(path)
   609  			if err != nil {
   610  				t.Errorf("obscuretestdata.DecodeToTempFile(%s): %v", path, err)
   611  				return
   612  			}
   613  			defer os.Remove(tf)
   614  			path = tf
   615  		}
   616  		var rc *ReadCloser
   617  		rc, err = OpenReader(path)
   618  		if err == nil {
   619  			defer rc.Close()
   620  			z = &rc.Reader
   621  		}
   622  		var err2 error
   623  		raw, err2 = os.ReadFile(path)
   624  		if err2 != nil {
   625  			t.Errorf("ReadFile(%s) error=%v", path, err2)
   626  			return
   627  		}
   628  	}
   629  	if err != zt.Error {
   630  		t.Errorf("error=%v, want %v", err, zt.Error)
   631  		return
   632  	}
   633  
   634  	// bail if file is not zip
   635  	if err == ErrFormat {
   636  		return
   637  	}
   638  
   639  	// bail here if no Files expected to be tested
   640  	// (there may actually be files in the zip, but we don't care)
   641  	if zt.File == nil {
   642  		return
   643  	}
   644  
   645  	if z.Comment != zt.Comment {
   646  		t.Errorf("comment=%q, want %q", z.Comment, zt.Comment)
   647  	}
   648  	if len(z.File) != len(zt.File) {
   649  		t.Fatalf("file count=%d, want %d", len(z.File), len(zt.File))
   650  	}
   651  
   652  	// test read of each file
   653  	for i, ft := range zt.File {
   654  		readTestFile(t, zt, ft, z.File[i], raw)
   655  	}
   656  	if t.Failed() {
   657  		return
   658  	}
   659  
   660  	// test simultaneous reads
   661  	n := 0
   662  	done := make(chan bool)
   663  	for i := 0; i < 5; i++ {
   664  		for j, ft := range zt.File {
   665  			go func(j int, ft ZipTestFile) {
   666  				readTestFile(t, zt, ft, z.File[j], raw)
   667  				done <- true
   668  			}(j, ft)
   669  			n++
   670  		}
   671  	}
   672  	for ; n > 0; n-- {
   673  		<-done
   674  	}
   675  }
   676  
   677  func equalTimeAndZone(t1, t2 time.Time) bool {
   678  	name1, offset1 := t1.Zone()
   679  	name2, offset2 := t2.Zone()
   680  	return t1.Equal(t2) && name1 == name2 && offset1 == offset2
   681  }
   682  
   683  func readTestFile(t *testing.T, zt ZipTest, ft ZipTestFile, f *File, raw []byte) {
   684  	if f.Name != ft.Name {
   685  		t.Errorf("name=%q, want %q", f.Name, ft.Name)
   686  	}
   687  	if !ft.Modified.IsZero() && !equalTimeAndZone(f.Modified, ft.Modified) {
   688  		t.Errorf("%s: Modified=%s, want %s", f.Name, f.Modified, ft.Modified)
   689  	}
   690  	if !ft.ModTime.IsZero() && !equalTimeAndZone(f.ModTime(), ft.ModTime) {
   691  		t.Errorf("%s: ModTime=%s, want %s", f.Name, f.ModTime(), ft.ModTime)
   692  	}
   693  
   694  	testFileMode(t, f, ft.Mode)
   695  
   696  	size := uint64(f.UncompressedSize)
   697  	if size == uint32max {
   698  		size = f.UncompressedSize64
   699  	} else if size != f.UncompressedSize64 {
   700  		t.Errorf("%v: UncompressedSize=%#x does not match UncompressedSize64=%#x", f.Name, size, f.UncompressedSize64)
   701  	}
   702  
   703  	// Check that OpenRaw returns the correct byte segment
   704  	rw, err := f.OpenRaw()
   705  	if err != nil {
   706  		t.Errorf("%v: OpenRaw error=%v", f.Name, err)
   707  		return
   708  	}
   709  	start, err := f.DataOffset()
   710  	if err != nil {
   711  		t.Errorf("%v: DataOffset error=%v", f.Name, err)
   712  		return
   713  	}
   714  	got, err := io.ReadAll(rw)
   715  	if err != nil {
   716  		t.Errorf("%v: OpenRaw ReadAll error=%v", f.Name, err)
   717  		return
   718  	}
   719  	end := uint64(start) + f.CompressedSize64
   720  	want := raw[start:end]
   721  	if !bytes.Equal(got, want) {
   722  		t.Logf("got %q", got)
   723  		t.Logf("want %q", want)
   724  		t.Errorf("%v: OpenRaw returned unexpected bytes", f.Name)
   725  		return
   726  	}
   727  
   728  	r, err := f.Open()
   729  	if err != nil {
   730  		t.Errorf("%v", err)
   731  		return
   732  	}
   733  
   734  	// For very large files, just check that the size is correct.
   735  	// The content is expected to be all zeros.
   736  	// Don't bother uncompressing: too big.
   737  	if ft.Content == nil && ft.File == "" && ft.Size > 0 {
   738  		if size != ft.Size {
   739  			t.Errorf("%v: uncompressed size %#x, want %#x", ft.Name, size, ft.Size)
   740  		}
   741  		r.Close()
   742  		return
   743  	}
   744  
   745  	var b bytes.Buffer
   746  	_, err = io.Copy(&b, r)
   747  	if err != ft.ContentErr {
   748  		t.Errorf("copying contents: %v (want %v)", err, ft.ContentErr)
   749  	}
   750  	if err != nil {
   751  		return
   752  	}
   753  	r.Close()
   754  
   755  	if g := uint64(b.Len()); g != size {
   756  		t.Errorf("%v: read %v bytes but f.UncompressedSize == %v", f.Name, g, size)
   757  	}
   758  
   759  	var c []byte
   760  	if ft.Content != nil {
   761  		c = ft.Content
   762  	} else if c, err = os.ReadFile("testdata/" + ft.File); err != nil {
   763  		t.Error(err)
   764  		return
   765  	}
   766  
   767  	if b.Len() != len(c) {
   768  		t.Errorf("%s: len=%d, want %d", f.Name, b.Len(), len(c))
   769  		return
   770  	}
   771  
   772  	for i, b := range b.Bytes() {
   773  		if b != c[i] {
   774  			t.Errorf("%s: content[%d]=%q want %q", f.Name, i, b, c[i])
   775  			return
   776  		}
   777  	}
   778  }
   779  
   780  func testFileMode(t *testing.T, f *File, want fs.FileMode) {
   781  	mode := f.Mode()
   782  	if want == 0 {
   783  		t.Errorf("%s mode: got %v, want none", f.Name, mode)
   784  	} else if mode != want {
   785  		t.Errorf("%s mode: want %v, got %v", f.Name, want, mode)
   786  	}
   787  }
   788  
   789  func TestInvalidFiles(t *testing.T) {
   790  	const size = 1024 * 70 // 70kb
   791  	b := make([]byte, size)
   792  
   793  	// zeroes
   794  	_, err := NewReader(bytes.NewReader(b), size)
   795  	if err != ErrFormat {
   796  		t.Errorf("zeroes: error=%v, want %v", err, ErrFormat)
   797  	}
   798  
   799  	// repeated directoryEndSignatures
   800  	sig := make([]byte, 4)
   801  	binary.LittleEndian.PutUint32(sig, directoryEndSignature)
   802  	for i := 0; i < size-4; i += 4 {
   803  		copy(b[i:i+4], sig)
   804  	}
   805  	_, err = NewReader(bytes.NewReader(b), size)
   806  	if err != ErrFormat {
   807  		t.Errorf("sigs: error=%v, want %v", err, ErrFormat)
   808  	}
   809  
   810  	// negative size
   811  	_, err = NewReader(bytes.NewReader([]byte("foobar")), -1)
   812  	if err == nil {
   813  		t.Errorf("archive/zip.NewReader: expected error when negative size is passed")
   814  	}
   815  }
   816  
   817  func messWith(fileName string, corrupter func(b []byte)) (r io.ReaderAt, size int64) {
   818  	data, err := os.ReadFile(filepath.Join("testdata", fileName))
   819  	if err != nil {
   820  		panic("Error reading " + fileName + ": " + err.Error())
   821  	}
   822  	corrupter(data)
   823  	return bytes.NewReader(data), int64(len(data))
   824  }
   825  
   826  func returnCorruptCRC32Zip() (r io.ReaderAt, size int64) {
   827  	return messWith("go-with-datadesc-sig.zip", func(b []byte) {
   828  		// Corrupt one of the CRC32s in the data descriptor:
   829  		b[0x2d]++
   830  	})
   831  }
   832  
   833  func returnCorruptNotStreamedZip() (r io.ReaderAt, size int64) {
   834  	return messWith("crc32-not-streamed.zip", func(b []byte) {
   835  		// Corrupt foo.txt's final crc32 byte, in both
   836  		// the file header and TOC. (0x7e -> 0x7f)
   837  		b[0x11]++
   838  		b[0x9d]++
   839  
   840  		// TODO(bradfitz): add a new test that only corrupts
   841  		// one of these values, and verify that that's also an
   842  		// error. Currently, the reader code doesn't verify the
   843  		// fileheader and TOC's crc32 match if they're both
   844  		// non-zero and only the second line above, the TOC,
   845  		// is what matters.
   846  	})
   847  }
   848  
   849  // rZipBytes returns the bytes of a recursive zip file, without
   850  // putting it on disk and triggering certain virus scanners.
   851  func rZipBytes() []byte {
   852  	s := `
   853  0000000 50 4b 03 04 14 00 00 00 08 00 08 03 64 3c f9 f4
   854  0000010 89 64 48 01 00 00 b8 01 00 00 07 00 00 00 72 2f
   855  0000020 72 2e 7a 69 70 00 25 00 da ff 50 4b 03 04 14 00
   856  0000030 00 00 08 00 08 03 64 3c f9 f4 89 64 48 01 00 00
   857  0000040 b8 01 00 00 07 00 00 00 72 2f 72 2e 7a 69 70 00
   858  0000050 2f 00 d0 ff 00 25 00 da ff 50 4b 03 04 14 00 00
   859  0000060 00 08 00 08 03 64 3c f9 f4 89 64 48 01 00 00 b8
   860  0000070 01 00 00 07 00 00 00 72 2f 72 2e 7a 69 70 00 2f
   861  0000080 00 d0 ff c2 54 8e 57 39 00 05 00 fa ff c2 54 8e
   862  0000090 57 39 00 05 00 fa ff 00 05 00 fa ff 00 14 00 eb
   863  00000a0 ff c2 54 8e 57 39 00 05 00 fa ff 00 05 00 fa ff
   864  00000b0 00 14 00 eb ff 42 88 21 c4 00 00 14 00 eb ff 42
   865  00000c0 88 21 c4 00 00 14 00 eb ff 42 88 21 c4 00 00 14
   866  00000d0 00 eb ff 42 88 21 c4 00 00 14 00 eb ff 42 88 21
   867  00000e0 c4 00 00 00 00 ff ff 00 00 00 ff ff 00 34 00 cb
   868  00000f0 ff 42 88 21 c4 00 00 00 00 ff ff 00 00 00 ff ff
   869  0000100 00 34 00 cb ff 42 e8 21 5e 0f 00 00 00 ff ff 0a
   870  0000110 f0 66 64 12 61 c0 15 dc e8 a0 48 bf 48 af 2a b3
   871  0000120 20 c0 9b 95 0d c4 67 04 42 53 06 06 06 40 00 06
   872  0000130 00 f9 ff 6d 01 00 00 00 00 42 e8 21 5e 0f 00 00
   873  0000140 00 ff ff 0a f0 66 64 12 61 c0 15 dc e8 a0 48 bf
   874  0000150 48 af 2a b3 20 c0 9b 95 0d c4 67 04 42 53 06 06
   875  0000160 06 40 00 06 00 f9 ff 6d 01 00 00 00 00 50 4b 01
   876  0000170 02 14 00 14 00 00 00 08 00 08 03 64 3c f9 f4 89
   877  0000180 64 48 01 00 00 b8 01 00 00 07 00 00 00 00 00 00
   878  0000190 00 00 00 00 00 00 00 00 00 00 00 72 2f 72 2e 7a
   879  00001a0 69 70 50 4b 05 06 00 00 00 00 01 00 01 00 35 00
   880  00001b0 00 00 6d 01 00 00 00 00`
   881  	s = regexp.MustCompile(`[0-9a-f]{7}`).ReplaceAllString(s, "")
   882  	s = regexp.MustCompile(`\s+`).ReplaceAllString(s, "")
   883  	b, err := hex.DecodeString(s)
   884  	if err != nil {
   885  		panic(err)
   886  	}
   887  	return b
   888  }
   889  
   890  func returnRecursiveZip() (r io.ReaderAt, size int64) {
   891  	b := rZipBytes()
   892  	return bytes.NewReader(b), int64(len(b))
   893  }
   894  
   895  // biggestZipBytes returns the bytes of a zip file biggest.zip
   896  // that contains a zip file bigger.zip that contains a zip file
   897  // big.zip that contains big.file, which contains 2³²-1 zeros.
   898  // The big.zip file is interesting because it has no zip64 header,
   899  // much like the innermost zip files in the well-known 42.zip.
   900  //
   901  // biggest.zip was generated by changing isZip64 to use > uint32max
   902  // instead of >= uint32max and then running this program:
   903  //
   904  //	package main
   905  //
   906  //	import (
   907  //		"archive/zip"
   908  //		"bytes"
   909  //		"io"
   910  //		"log"
   911  //		"os"
   912  //	)
   913  //
   914  //	type zeros struct{}
   915  //
   916  //	func (zeros) Read(b []byte) (int, error) {
   917  //		clear(b)
   918  //		return len(b), nil
   919  //	}
   920  //
   921  //	func main() {
   922  //		bigZip := makeZip("big.file", io.LimitReader(zeros{}, 1<<32-1))
   923  //		if err := os.WriteFile("/tmp/big.zip", bigZip, 0666); err != nil {
   924  //			log.Fatal(err)
   925  //		}
   926  //
   927  //		biggerZip := makeZip("big.zip", bytes.NewReader(bigZip))
   928  //		if err := os.WriteFile("/tmp/bigger.zip", biggerZip, 0666); err != nil {
   929  //			log.Fatal(err)
   930  //		}
   931  //
   932  //		biggestZip := makeZip("bigger.zip", bytes.NewReader(biggerZip))
   933  //		if err := os.WriteFile("/tmp/biggest.zip", biggestZip, 0666); err != nil {
   934  //			log.Fatal(err)
   935  //		}
   936  //	}
   937  //
   938  //	func makeZip(name string, r io.Reader) []byte {
   939  //		var buf bytes.Buffer
   940  //		w := zip.NewWriter(&buf)
   941  //		wf, err := w.Create(name)
   942  //		if err != nil {
   943  //			log.Fatal(err)
   944  //		}
   945  //		if _, err = io.Copy(wf, r); err != nil {
   946  //			log.Fatal(err)
   947  //		}
   948  //		if err := w.Close(); err != nil {
   949  //			log.Fatal(err)
   950  //		}
   951  //		return buf.Bytes()
   952  //	}
   953  //
   954  // The 4 GB of zeros compresses to 4 MB, which compresses to 20 kB,
   955  // which compresses to 1252 bytes (in the hex dump below).
   956  //
   957  // It's here in hex for the same reason as rZipBytes above: to avoid
   958  // problems with on-disk virus scanners or other zip processors.
   959  func biggestZipBytes() []byte {
   960  	s := `
   961  0000000 50 4b 03 04 14 00 08 00 08 00 00 00 00 00 00 00
   962  0000010 00 00 00 00 00 00 00 00 00 00 0a 00 00 00 62 69
   963  0000020 67 67 65 72 2e 7a 69 70 ec dc 6b 4c 53 67 18 07
   964  0000030 f0 16 c5 ca 65 2e cb b8 94 20 61 1f 44 33 c7 cd
   965  0000040 c0 86 4a b5 c0 62 8a 61 05 c6 cd 91 b2 54 8c 1b
   966  0000050 63 8b 03 9c 1b 95 52 5a e3 a0 19 6c b2 05 59 44
   967  0000060 64 9d 73 83 71 11 46 61 14 b9 1d 14 09 4a c3 60
   968  0000070 2e 4c 6e a5 60 45 02 62 81 95 b6 94 9e 9e 77 e7
   969  0000080 d0 43 b6 f8 71 df 96 3c e7 a4 69 ce bf cf e9 79
   970  0000090 ce ef 79 3f bf f1 31 db b6 bb 31 76 92 e7 f3 07
   971  00000a0 8b fc 9c ca cc 08 cc cb cc 5e d2 1c 88 d9 7e bb
   972  00000b0 4f bb 3a 3f 75 f1 5d 7f 8f c2 68 67 77 8f 25 ff
   973  00000c0 84 e2 93 2d ef a4 95 3d 71 4e 2c b9 b0 87 c3 be
   974  00000d0 3d f8 a7 60 24 61 c5 ef ae 9e c8 6c 6d 4e 69 c8
   975  00000e0 67 65 34 f8 37 76 2d 76 5c 54 f3 95 65 49 c7 0f
   976  00000f0 18 71 4b 7e 5b 6a d1 79 47 61 41 b0 4e 2a 74 45
   977  0000100 43 58 12 b2 5a a5 c6 7d 68 55 88 d4 98 75 18 6d
   978  0000110 08 d1 1f 8f 5a 9e 96 ee 45 cf a4 84 4e 4b e8 50
   979  0000120 a7 13 d9 06 de 52 81 97 36 b2 d7 b8 fc 2b 5f 55
   980  0000130 23 1f 32 59 cf 30 27 fb e2 8a b9 de 45 dd 63 9c
   981  0000140 4b b5 8b 96 4c 7a 62 62 cc a1 a7 cf fa f1 fe dd
   982  0000150 54 62 11 bf 36 78 b3 c7 b1 b5 f2 61 4d 4e dd 66
   983  0000160 32 2e e6 70 34 5f f4 c9 e6 6c 43 6f da 6b c6 c3
   984  0000170 09 2c ce 09 57 7f d2 7e b4 23 ba 7c 1b 99 bc 22
   985  0000180 3e f1 de 91 2f e3 9c 1b 82 cc c2 84 39 aa e6 de
   986  0000190 b4 69 fc cc cb 72 a6 61 45 f0 d3 1d 26 19 7c 8d
   987  00001a0 29 c8 66 02 be 77 6a f9 3d 34 79 17 19 c8 96 24
   988  00001b0 a3 ac e4 dd 3b 1a 8e c6 fe 96 38 6b bf 67 5a 23
   989  00001c0 f4 16 f4 e6 8a b4 fc c2 cd bf 95 66 1d bb 35 aa
   990  00001d0 92 7d 66 d8 08 8d a5 1f 54 2a af 09 cf 61 ff d2
   991  00001e0 85 9d 8f b6 d7 88 07 4a 86 03 db 64 f3 d9 92 73
   992  00001f0 df ec a7 fc 23 4c 8d 83 79 63 2a d9 fd 8d b3 c8
   993  0000200 8f 7e d4 19 85 e6 8d 1c 76 f0 8b 58 32 fd 9a d6
   994  0000210 85 e2 48 ad c3 d5 60 6f 7e 22 dd ef 09 49 7c 7f
   995  0000220 3a 45 c3 71 b7 df f3 4c 63 fb b5 d9 31 5f 6e d6
   996  0000230 24 1d a4 4a fe 32 a7 5c 16 48 5c 3e 08 6b 8a d3
   997  0000240 25 1d a2 12 a5 59 24 ea 20 5f 52 6d ad 94 db 6b
   998  0000250 94 b9 5d eb 4b a7 5c 44 bb 1e f2 3c 6b cf 52 c9
   999  0000260 e9 e5 ba 06 b9 c4 e5 0a d0 00 0d d0 00 0d d0 00
  1000  0000270 0d d0 00 0d d0 00 0d d0 00 0d d0 00 0d d0 00 0d
  1001  0000280 d0 00 0d d0 00 0d d0 00 0d d0 00 0d d0 00 0d d0
  1002  0000290 00 0d d0 00 0d d0 00 0d d0 00 0d d0 00 0d d0 00
  1003  00002a0 0d d0 00 cd ff 9e 46 86 fa a7 7d 3a 43 d7 8e 10
  1004  00002b0 52 e9 be e6 6e cf eb 9e 85 4d 65 ce cc 30 c1 44
  1005  00002c0 c0 4e af bc 9c 6c 4b a0 d7 54 ff 1d d5 5c 89 fb
  1006  00002d0 b5 34 7e c4 c2 9e f5 a0 f6 5b 7e 6e ca 73 c7 ef
  1007  00002e0 5d be de f9 e8 81 eb a5 0a a5 63 54 2c d7 1c d1
  1008  00002f0 89 17 85 f8 16 94 f2 8a b2 a3 f5 b6 6d df 75 cd
  1009  0000300 90 dd 64 bd 5d 55 4e f2 55 19 1b b7 cc ef 1b ea
  1010  0000310 2e 05 9c f4 aa 1e a8 cd a6 82 c7 59 0f 5e 9d e0
  1011  0000320 bb fc 6c d6 99 23 eb 36 ad c6 c5 e1 d8 e1 e2 3e
  1012  0000330 d9 90 5a f7 91 5d 6f bc 33 6d 98 47 d2 7c 2e 2f
  1013  0000340 99 a4 25 72 85 49 2c be 0b 5b af 8f e5 6e 81 a6
  1014  0000350 a3 5a 6f 39 53 3a ab 7a 8b 1e 26 f7 46 6c 7d 26
  1015  0000360 53 b3 22 31 94 d3 83 f2 18 4d f5 92 33 27 53 97
  1016  0000370 0f d3 e6 55 9c a6 c5 31 87 6f d3 f3 ae 39 6f 56
  1017  0000380 10 7b ab 7e d0 b4 ca f2 b8 05 be 3f 0e 6e 5a 75
  1018  0000390 ab 0c f5 37 0e ba 8e 75 71 7a aa ed 7a dd 6a 63
  1019  00003a0 be 9b a0 97 27 6a 6f e7 d3 8b c4 7c ec d3 91 56
  1020  00003b0 d9 ac 5e bf 16 42 2f 00 1f 93 a2 23 87 bd e2 59
  1021  00003c0 a0 de 1a 66 c8 62 eb 55 8f 91 17 b4 61 42 7a 50
  1022  00003d0 40 03 34 40 03 34 40 03 34 40 03 34 40 03 34 40
  1023  00003e0 03 34 40 03 34 40 03 34 40 03 34 40 03 34 40 03
  1024  00003f0 34 40 03 34 40 03 34 ff 85 86 90 8b ea 67 90 0d
  1025  0000400 e1 42 1b d2 61 d6 79 ec fd 3e 44 28 a4 51 6c 5c
  1026  0000410 fc d2 72 ca ba 82 18 46 16 61 cd 93 a9 0f d1 24
  1027  0000420 17 99 e2 2c 71 16 84 0c c8 7a 13 0f 9a 5e c5 f0
  1028  0000430 79 64 e2 12 4d c8 82 a1 81 19 2d aa 44 6d 87 54
  1029  0000440 84 71 c1 f6 d4 ca 25 8c 77 b9 08 c7 c8 5e 10 8a
  1030  0000450 8f 61 ed 8c ba 30 1f 79 9a c7 60 34 2b b9 8c f8
  1031  0000460 18 a6 83 1b e3 9f ad 79 fe fd 1b 8b f1 fc 41 6f
  1032  0000470 d4 13 1f e3 b8 83 ba 64 92 e7 eb e4 77 05 8f ba
  1033  0000480 fa 3b 00 00 ff ff 50 4b 07 08 a6 18 b1 91 5e 04
  1034  0000490 00 00 e4 47 00 00 50 4b 01 02 14 00 14 00 08 00
  1035  00004a0 08 00 00 00 00 00 a6 18 b1 91 5e 04 00 00 e4 47
  1036  00004b0 00 00 0a 00 00 00 00 00 00 00 00 00 00 00 00 00
  1037  00004c0 00 00 00 00 62 69 67 67 65 72 2e 7a 69 70 50 4b
  1038  00004d0 05 06 00 00 00 00 01 00 01 00 38 00 00 00 96 04
  1039  00004e0 00 00 00 00`
  1040  	s = regexp.MustCompile(`[0-9a-f]{7}`).ReplaceAllString(s, "")
  1041  	s = regexp.MustCompile(`\s+`).ReplaceAllString(s, "")
  1042  	b, err := hex.DecodeString(s)
  1043  	if err != nil {
  1044  		panic(err)
  1045  	}
  1046  	return b
  1047  }
  1048  
  1049  func returnBigZipBytes() (r io.ReaderAt, size int64) {
  1050  	b := biggestZipBytes()
  1051  	for i := 0; i < 2; i++ {
  1052  		r, err := NewReader(bytes.NewReader(b), int64(len(b)))
  1053  		if err != nil {
  1054  			panic(err)
  1055  		}
  1056  		f, err := r.File[0].Open()
  1057  		if err != nil {
  1058  			panic(err)
  1059  		}
  1060  		b, err = io.ReadAll(f)
  1061  		if err != nil {
  1062  			panic(err)
  1063  		}
  1064  	}
  1065  	return bytes.NewReader(b), int64(len(b))
  1066  }
  1067  
  1068  func TestIssue8186(t *testing.T) {
  1069  	// Directory headers & data found in the TOC of a JAR file.
  1070  	dirEnts := []string{
  1071  		"PK\x01\x02\n\x00\n\x00\x00\b\x00\x004\x9d3?\xaa\x1b\x06\xf0\x81\x02\x00\x00\x81\x02\x00\x00-\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00res/drawable-xhdpi-v4/ic_actionbar_accept.png\xfe\xca\x00\x00\x00",
  1072  		"PK\x01\x02\n\x00\n\x00\x00\b\x00\x004\x9d3?\x90K\x89\xc7t\n\x00\x00t\n\x00\x00\x0e\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xd1\x02\x00\x00resources.arsc\x00\x00\x00",
  1073  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?\xff$\x18\xed3\x03\x00\x00\xb4\b\x00\x00\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00t\r\x00\x00AndroidManifest.xml",
  1074  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?\x14\xc5K\xab\x192\x02\x00\xc8\xcd\x04\x00\v\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe8\x10\x00\x00classes.dex",
  1075  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?E\x96\nD\xac\x01\x00\x00P\x03\x00\x00&\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00:C\x02\x00res/layout/actionbar_set_wallpaper.xml",
  1076  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?Ļ\x14\xe3\xd8\x01\x00\x00\xd8\x03\x00\x00 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00:E\x02\x00res/layout/wallpaper_cropper.xml",
  1077  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?}\xc1\x15\x9eZ\x01\x00\x00!\x02\x00\x00\x14\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00`G\x02\x00META-INF/MANIFEST.MF",
  1078  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?\xe6\x98Ьo\x01\x00\x00\x84\x02\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfcH\x02\x00META-INF/CERT.SF",
  1079  		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?\xbfP\x96b\x86\x04\x00\x00\xb2\x06\x00\x00\x11\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xa9J\x02\x00META-INF/CERT.RSA",
  1080  	}
  1081  	for i, s := range dirEnts {
  1082  		var f File
  1083  		err := readDirectoryHeader(&f, strings.NewReader(s))
  1084  		if err != nil {
  1085  			t.Errorf("error reading #%d: %v", i, err)
  1086  		}
  1087  	}
  1088  }
  1089  
  1090  // Verify we return ErrUnexpectedEOF when length is short.
  1091  func TestIssue10957(t *testing.T) {
  1092  	data := []byte("PK\x03\x040000000PK\x01\x0200000" +
  1093  		"0000000000000000000\x00" +
  1094  		"\x00\x00\x00\x00\x00000000000000PK\x01" +
  1095  		"\x020000000000000000000" +
  1096  		"00000\v\x00\x00\x00\x00\x00000000000" +
  1097  		"00000000000000PK\x01\x0200" +
  1098  		"00000000000000000000" +
  1099  		"00\v\x00\x00\x00\x00\x00000000000000" +
  1100  		"00000000000PK\x01\x020000<" +
  1101  		"0\x00\x0000000000000000\v\x00\v" +
  1102  		"\x00\x00\x00\x00\x0000000000\x00\x00\x00\x00000" +
  1103  		"00000000PK\x01\x0200000000" +
  1104  		"0000000000000000\v\x00\x00\x00" +
  1105  		"\x00\x0000PK\x05\x06000000\x05\x00\xfd\x00\x00\x00" +
  1106  		"\v\x00\x00\x00\x00\x00")
  1107  	z, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1108  	if err != nil {
  1109  		t.Fatal(err)
  1110  	}
  1111  	for i, f := range z.File {
  1112  		r, err := f.Open()
  1113  		if err != nil {
  1114  			continue
  1115  		}
  1116  		if f.UncompressedSize64 < 1e6 {
  1117  			n, err := io.Copy(io.Discard, r)
  1118  			if i == 3 && err != io.ErrUnexpectedEOF {
  1119  				t.Errorf("File[3] error = %v; want io.ErrUnexpectedEOF", err)
  1120  			}
  1121  			if err == nil && uint64(n) != f.UncompressedSize64 {
  1122  				t.Errorf("file %d: bad size: copied=%d; want=%d", i, n, f.UncompressedSize64)
  1123  			}
  1124  		}
  1125  		r.Close()
  1126  	}
  1127  }
  1128  
  1129  // Verify that this particular malformed zip file is rejected.
  1130  func TestIssue10956(t *testing.T) {
  1131  	data := []byte("PK\x06\x06PK\x06\a0000\x00\x00\x00\x00\x00\x00\x00\x00" +
  1132  		"0000PK\x05\x06000000000000" +
  1133  		"0000\v\x00000\x00\x00\x00\x00\x00\x00\x000")
  1134  	r, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1135  	if err == nil {
  1136  		t.Errorf("got nil error, want ErrFormat")
  1137  	}
  1138  	if r != nil {
  1139  		t.Errorf("got non-nil Reader, want nil")
  1140  	}
  1141  }
  1142  
  1143  // Verify we return ErrUnexpectedEOF when reading truncated data descriptor.
  1144  func TestIssue11146(t *testing.T) {
  1145  	data := []byte("PK\x03\x040000000000000000" +
  1146  		"000000\x01\x00\x00\x000\x01\x00\x00\xff\xff0000" +
  1147  		"0000000000000000PK\x01\x02" +
  1148  		"0000\b0\b\x00000000000000" +
  1149  		"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x000000PK\x05\x06\x00\x00" +
  1150  		"\x00\x0000\x01\x00\x26\x00\x00\x008\x00\x00\x00\x00\x00")
  1151  	z, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1152  	if err != nil {
  1153  		t.Fatal(err)
  1154  	}
  1155  	r, err := z.File[0].Open()
  1156  	if err != nil {
  1157  		t.Fatal(err)
  1158  	}
  1159  	_, err = io.ReadAll(r)
  1160  	if err != io.ErrUnexpectedEOF {
  1161  		t.Errorf("File[0] error = %v; want io.ErrUnexpectedEOF", err)
  1162  	}
  1163  	r.Close()
  1164  }
  1165  
  1166  // Verify we do not treat non-zip64 archives as zip64
  1167  func TestIssue12449(t *testing.T) {
  1168  	data := []byte{
  1169  		0x50, 0x4b, 0x03, 0x04, 0x14, 0x00, 0x08, 0x00,
  1170  		0x00, 0x00, 0x6b, 0xb4, 0xba, 0x46, 0x00, 0x00,
  1171  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1172  		0x00, 0x00, 0x03, 0x00, 0x18, 0x00, 0xca, 0x64,
  1173  		0x55, 0x75, 0x78, 0x0b, 0x00, 0x50, 0x4b, 0x05,
  1174  		0x06, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  1175  		0x00, 0x49, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00,
  1176  		0x00, 0x31, 0x31, 0x31, 0x32, 0x32, 0x32, 0x0a,
  1177  		0x50, 0x4b, 0x07, 0x08, 0x1d, 0x88, 0x77, 0xb0,
  1178  		0x07, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00,
  1179  		0x50, 0x4b, 0x01, 0x02, 0x14, 0x03, 0x14, 0x00,
  1180  		0x08, 0x00, 0x00, 0x00, 0x6b, 0xb4, 0xba, 0x46,
  1181  		0x1d, 0x88, 0x77, 0xb0, 0x07, 0x00, 0x00, 0x00,
  1182  		0x07, 0x00, 0x00, 0x00, 0x03, 0x00, 0x18, 0x00,
  1183  		0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1184  		0xa0, 0x81, 0x00, 0x00, 0x00, 0x00, 0xca, 0x64,
  1185  		0x55, 0x75, 0x78, 0x0b, 0x00, 0x50, 0x4b, 0x05,
  1186  		0x06, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  1187  		0x00, 0x49, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00,
  1188  		0x00, 0x97, 0x2b, 0x49, 0x23, 0x05, 0xc5, 0x0b,
  1189  		0xa7, 0xd1, 0x52, 0xa2, 0x9c, 0x50, 0x4b, 0x06,
  1190  		0x07, 0xc8, 0x19, 0xc1, 0xaf, 0x94, 0x9c, 0x61,
  1191  		0x44, 0xbe, 0x94, 0x19, 0x42, 0x58, 0x12, 0xc6,
  1192  		0x5b, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x00, 0x00,
  1193  		0x00, 0x01, 0x00, 0x01, 0x00, 0x69, 0x00, 0x00,
  1194  		0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,
  1195  	}
  1196  	// Read in the archive.
  1197  	_, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1198  	if err != nil {
  1199  		t.Errorf("Error reading the archive: %v", err)
  1200  	}
  1201  }
  1202  
  1203  func TestFS(t *testing.T) {
  1204  	for _, test := range []struct {
  1205  		file string
  1206  		want []string
  1207  	}{
  1208  		{
  1209  			"testdata/unix.zip",
  1210  			[]string{"hello", "dir/bar", "readonly"},
  1211  		},
  1212  		{
  1213  			"testdata/subdir.zip",
  1214  			[]string{"a/b/c"},
  1215  		},
  1216  	} {
  1217  		t.Run(test.file, func(t *testing.T) {
  1218  			t.Parallel()
  1219  			z, err := OpenReader(test.file)
  1220  			if err != nil {
  1221  				t.Fatal(err)
  1222  			}
  1223  			defer z.Close()
  1224  			if err := fstest.TestFS(z, test.want...); err != nil {
  1225  				t.Error(err)
  1226  			}
  1227  		})
  1228  	}
  1229  }
  1230  
  1231  func TestFSWalk(t *testing.T) {
  1232  	for _, test := range []struct {
  1233  		file    string
  1234  		want    []string
  1235  		wantErr bool
  1236  	}{
  1237  		{
  1238  			file: "testdata/unix.zip",
  1239  			want: []string{".", "dir", "dir/bar", "dir/empty", "hello", "readonly"},
  1240  		},
  1241  		{
  1242  			file: "testdata/subdir.zip",
  1243  			want: []string{".", "a", "a/b", "a/b/c"},
  1244  		},
  1245  		{
  1246  			file:    "testdata/dupdir.zip",
  1247  			wantErr: true,
  1248  		},
  1249  	} {
  1250  		t.Run(test.file, func(t *testing.T) {
  1251  			t.Parallel()
  1252  			z, err := OpenReader(test.file)
  1253  			if err != nil {
  1254  				t.Fatal(err)
  1255  			}
  1256  			var files []string
  1257  			sawErr := false
  1258  			err = fs.WalkDir(z, ".", func(path string, d fs.DirEntry, err error) error {
  1259  				if err != nil {
  1260  					if !test.wantErr {
  1261  						t.Errorf("%s: %v", path, err)
  1262  					}
  1263  					sawErr = true
  1264  					return nil
  1265  				}
  1266  				files = append(files, path)
  1267  				return nil
  1268  			})
  1269  			if err != nil {
  1270  				t.Errorf("fs.WalkDir error: %v", err)
  1271  			}
  1272  			if test.wantErr && !sawErr {
  1273  				t.Error("succeeded but want error")
  1274  			} else if !test.wantErr && sawErr {
  1275  				t.Error("unexpected error")
  1276  			}
  1277  			if test.want != nil && !slices.Equal(files, test.want) {
  1278  				t.Errorf("got %v want %v", files, test.want)
  1279  			}
  1280  		})
  1281  	}
  1282  }
  1283  
  1284  func TestFSWalkBadFile(t *testing.T) {
  1285  	t.Parallel()
  1286  
  1287  	var buf bytes.Buffer
  1288  	zw := NewWriter(&buf)
  1289  	hdr := &FileHeader{Name: "."}
  1290  	hdr.SetMode(fs.ModeDir | 0o755)
  1291  	w, err := zw.CreateHeader(hdr)
  1292  	if err != nil {
  1293  		t.Fatalf("create zip header: %v", err)
  1294  	}
  1295  	_, err = w.Write([]byte("some data"))
  1296  	if err != nil {
  1297  		t.Fatalf("write zip contents: %v", err)
  1298  
  1299  	}
  1300  	err = zw.Close()
  1301  	if err != nil {
  1302  		t.Fatalf("close zip writer: %v", err)
  1303  
  1304  	}
  1305  
  1306  	zr, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
  1307  	if err != nil {
  1308  		t.Fatalf("create zip reader: %v", err)
  1309  
  1310  	}
  1311  	var count int
  1312  	var errRepeat = errors.New("repeated call to path")
  1313  	err = fs.WalkDir(zr, ".", func(p string, d fs.DirEntry, err error) error {
  1314  		count++
  1315  		if count > 2 { // once for directory read, once for the error
  1316  			return errRepeat
  1317  		}
  1318  		return err
  1319  	})
  1320  	if err == nil {
  1321  		t.Fatalf("expected error from invalid file name")
  1322  	} else if errors.Is(err, errRepeat) {
  1323  		t.Fatal(err)
  1324  	}
  1325  }
  1326  
  1327  func TestFSModTime(t *testing.T) {
  1328  	t.Parallel()
  1329  	z, err := OpenReader("testdata/subdir.zip")
  1330  	if err != nil {
  1331  		t.Fatal(err)
  1332  	}
  1333  	defer z.Close()
  1334  
  1335  	for _, test := range []struct {
  1336  		name string
  1337  		want time.Time
  1338  	}{
  1339  		{
  1340  			"a",
  1341  			time.Date(2021, 4, 19, 12, 29, 56, 0, timeZone(-7*time.Hour)).UTC(),
  1342  		},
  1343  		{
  1344  			"a/b/c",
  1345  			time.Date(2021, 4, 19, 12, 29, 59, 0, timeZone(-7*time.Hour)).UTC(),
  1346  		},
  1347  	} {
  1348  		fi, err := fs.Stat(z, test.name)
  1349  		if err != nil {
  1350  			t.Errorf("%s: %v", test.name, err)
  1351  			continue
  1352  		}
  1353  		if got := fi.ModTime(); !got.Equal(test.want) {
  1354  			t.Errorf("%s: got modtime %v, want %v", test.name, got, test.want)
  1355  		}
  1356  	}
  1357  }
  1358  
  1359  func TestCVE202127919(t *testing.T) {
  1360  	t.Setenv("GODEBUG", "zipinsecurepath=0")
  1361  	// Archive containing only the file "../test.txt"
  1362  	data := []byte{
  1363  		0x50, 0x4b, 0x03, 0x04, 0x14, 0x00, 0x08, 0x00,
  1364  		0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1365  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1366  		0x00, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x2e, 0x2e,
  1367  		0x2f, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x74, 0x78,
  1368  		0x74, 0x0a, 0xc9, 0xc8, 0x2c, 0x56, 0xc8, 0x2c,
  1369  		0x56, 0x48, 0x54, 0x28, 0x49, 0x2d, 0x2e, 0x51,
  1370  		0x28, 0x49, 0xad, 0x28, 0x51, 0x48, 0xcb, 0xcc,
  1371  		0x49, 0xd5, 0xe3, 0x02, 0x04, 0x00, 0x00, 0xff,
  1372  		0xff, 0x50, 0x4b, 0x07, 0x08, 0xc0, 0xd7, 0xed,
  1373  		0xc3, 0x20, 0x00, 0x00, 0x00, 0x1a, 0x00, 0x00,
  1374  		0x00, 0x50, 0x4b, 0x01, 0x02, 0x14, 0x00, 0x14,
  1375  		0x00, 0x08, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00,
  1376  		0x00, 0xc0, 0xd7, 0xed, 0xc3, 0x20, 0x00, 0x00,
  1377  		0x00, 0x1a, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00,
  1378  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1379  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e,
  1380  		0x2e, 0x2f, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x74,
  1381  		0x78, 0x74, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x00,
  1382  		0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x39, 0x00,
  1383  		0x00, 0x00, 0x59, 0x00, 0x00, 0x00, 0x00, 0x00,
  1384  	}
  1385  	r, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1386  	if err != ErrInsecurePath {
  1387  		t.Fatalf("Error reading the archive: %v", err)
  1388  	}
  1389  	_, err = r.Open("test.txt")
  1390  	if err != nil {
  1391  		t.Errorf("Error reading file: %v", err)
  1392  	}
  1393  	if len(r.File) != 1 {
  1394  		t.Fatalf("No entries in the file list")
  1395  	}
  1396  	if r.File[0].Name != "../test.txt" {
  1397  		t.Errorf("Unexpected entry name: %s", r.File[0].Name)
  1398  	}
  1399  	if _, err := r.File[0].Open(); err != nil {
  1400  		t.Errorf("Error opening file: %v", err)
  1401  	}
  1402  }
  1403  
  1404  func TestOpenReaderInsecurePath(t *testing.T) {
  1405  	t.Setenv("GODEBUG", "zipinsecurepath=0")
  1406  	// Archive containing only the file "../test.txt"
  1407  	data := []byte{
  1408  		0x50, 0x4b, 0x03, 0x04, 0x14, 0x00, 0x08, 0x00,
  1409  		0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1410  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1411  		0x00, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x2e, 0x2e,
  1412  		0x2f, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x74, 0x78,
  1413  		0x74, 0x0a, 0xc9, 0xc8, 0x2c, 0x56, 0xc8, 0x2c,
  1414  		0x56, 0x48, 0x54, 0x28, 0x49, 0x2d, 0x2e, 0x51,
  1415  		0x28, 0x49, 0xad, 0x28, 0x51, 0x48, 0xcb, 0xcc,
  1416  		0x49, 0xd5, 0xe3, 0x02, 0x04, 0x00, 0x00, 0xff,
  1417  		0xff, 0x50, 0x4b, 0x07, 0x08, 0xc0, 0xd7, 0xed,
  1418  		0xc3, 0x20, 0x00, 0x00, 0x00, 0x1a, 0x00, 0x00,
  1419  		0x00, 0x50, 0x4b, 0x01, 0x02, 0x14, 0x00, 0x14,
  1420  		0x00, 0x08, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00,
  1421  		0x00, 0xc0, 0xd7, 0xed, 0xc3, 0x20, 0x00, 0x00,
  1422  		0x00, 0x1a, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00,
  1423  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1424  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e,
  1425  		0x2e, 0x2f, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x74,
  1426  		0x78, 0x74, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x00,
  1427  		0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x39, 0x00,
  1428  		0x00, 0x00, 0x59, 0x00, 0x00, 0x00, 0x00, 0x00,
  1429  	}
  1430  
  1431  	// Read in the archive with the OpenReader interface
  1432  	name := filepath.Join(t.TempDir(), "test.zip")
  1433  	err := os.WriteFile(name, data, 0644)
  1434  	if err != nil {
  1435  		t.Fatalf("Unable to write out the bugos zip entry")
  1436  	}
  1437  	r, err := OpenReader(name)
  1438  	if r != nil {
  1439  		defer r.Close()
  1440  	}
  1441  
  1442  	if err != ErrInsecurePath {
  1443  		t.Fatalf("Error reading the archive, we expected ErrInsecurePath but got: %v", err)
  1444  	}
  1445  	_, err = r.Open("test.txt")
  1446  	if err != nil {
  1447  		t.Errorf("Error reading file: %v", err)
  1448  	}
  1449  	if len(r.File) != 1 {
  1450  		t.Fatalf("No entries in the file list")
  1451  	}
  1452  	if r.File[0].Name != "../test.txt" {
  1453  		t.Errorf("Unexpected entry name: %s", r.File[0].Name)
  1454  	}
  1455  	if _, err := r.File[0].Open(); err != nil {
  1456  		t.Errorf("Error opening file: %v", err)
  1457  	}
  1458  }
  1459  
  1460  func TestCVE202133196(t *testing.T) {
  1461  	// Archive that indicates it has 1 << 128 -1 files,
  1462  	// this would previously cause a panic due to attempting
  1463  	// to allocate a slice with 1 << 128 -1 elements.
  1464  	data := []byte{
  1465  		0x50, 0x4b, 0x03, 0x04, 0x14, 0x00, 0x08, 0x08,
  1466  		0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1467  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1468  		0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x02,
  1469  		0x03, 0x62, 0x61, 0x65, 0x03, 0x04, 0x00, 0x00,
  1470  		0xff, 0xff, 0x50, 0x4b, 0x07, 0x08, 0xbe, 0x20,
  1471  		0x5c, 0x6c, 0x09, 0x00, 0x00, 0x00, 0x03, 0x00,
  1472  		0x00, 0x00, 0x50, 0x4b, 0x01, 0x02, 0x14, 0x00,
  1473  		0x14, 0x00, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00,
  1474  		0x00, 0x00, 0xbe, 0x20, 0x5c, 0x6c, 0x09, 0x00,
  1475  		0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00,
  1476  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1477  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1478  		0x01, 0x02, 0x03, 0x50, 0x4b, 0x06, 0x06, 0x2c,
  1479  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2d,
  1480  		0x00, 0x2d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1481  		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
  1482  		0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff,
  1483  		0xff, 0xff, 0xff, 0x31, 0x00, 0x00, 0x00, 0x00,
  1484  		0x00, 0x00, 0x00, 0x3a, 0x00, 0x00, 0x00, 0x00,
  1485  		0x00, 0x00, 0x00, 0x50, 0x4b, 0x06, 0x07, 0x00,
  1486  		0x00, 0x00, 0x00, 0x6b, 0x00, 0x00, 0x00, 0x00,
  1487  		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x50,
  1488  		0x4b, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0xff,
  1489  		0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  1490  		0xff, 0xff, 0xff, 0x00, 0x00,
  1491  	}
  1492  	_, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1493  	if err != ErrFormat {
  1494  		t.Fatalf("unexpected error, got: %v, want: %v", err, ErrFormat)
  1495  	}
  1496  
  1497  	// Also check that an archive containing a handful of empty
  1498  	// files doesn't cause an issue
  1499  	b := bytes.NewBuffer(nil)
  1500  	w := NewWriter(b)
  1501  	for i := 0; i < 5; i++ {
  1502  		_, err := w.Create("")
  1503  		if err != nil {
  1504  			t.Fatalf("Writer.Create failed: %s", err)
  1505  		}
  1506  	}
  1507  	if err := w.Close(); err != nil {
  1508  		t.Fatalf("Writer.Close failed: %s", err)
  1509  	}
  1510  	r, err := NewReader(bytes.NewReader(b.Bytes()), int64(b.Len()))
  1511  	if err != nil {
  1512  		t.Fatalf("NewReader failed: %s", err)
  1513  	}
  1514  	if len(r.File) != 5 {
  1515  		t.Errorf("Archive has unexpected number of files, got %d, want 5", len(r.File))
  1516  	}
  1517  }
  1518  
  1519  func TestCVE202139293(t *testing.T) {
  1520  	// directory size is so large, that the check in Reader.init
  1521  	// overflows when subtracting from the archive size, causing
  1522  	// the pre-allocation check to be bypassed.
  1523  	data := []byte{
  1524  		0x50, 0x4b, 0x06, 0x06, 0x05, 0x06, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b,
  1525  		0x06, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
  1526  		0x00, 0x00, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x1a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b,
  1527  		0x06, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
  1528  		0x00, 0x00, 0x00, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x31, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
  1529  		0xff, 0x50, 0xfe, 0x00, 0xff, 0x00, 0x3a, 0x00, 0x00, 0x00, 0xff,
  1530  	}
  1531  	_, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1532  	if err != ErrFormat {
  1533  		t.Fatalf("unexpected error, got: %v, want: %v", err, ErrFormat)
  1534  	}
  1535  }
  1536  
  1537  func TestCVE202141772(t *testing.T) {
  1538  	t.Setenv("GODEBUG", "zipinsecurepath=0")
  1539  	// Archive contains a file whose name is exclusively made up of '/', '\'
  1540  	// characters, or "../", "..\" paths, which would previously cause a panic.
  1541  	//
  1542  	//  Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
  1543  	// --------  ------  ------- ---- ---------- ----- --------  ----
  1544  	//        0  Stored        0   0% 08-05-2021 18:32 00000000  /
  1545  	//        0  Stored        0   0% 09-14-2021 12:59 00000000  //
  1546  	//        0  Stored        0   0% 09-14-2021 12:59 00000000  \
  1547  	//       11  Stored       11   0% 09-14-2021 13:04 0d4a1185  /test.txt
  1548  	// --------          -------  ---                            -------
  1549  	//       11               11   0%                            4 files
  1550  	data := []byte{
  1551  		0x50, 0x4b, 0x03, 0x04, 0x0a, 0x00, 0x00, 0x08,
  1552  		0x00, 0x00, 0x06, 0x94, 0x05, 0x53, 0x00, 0x00,
  1553  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1554  		0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x2f, 0x50,
  1555  		0x4b, 0x03, 0x04, 0x0a, 0x00, 0x00, 0x00, 0x00,
  1556  		0x00, 0x78, 0x67, 0x2e, 0x53, 0x00, 0x00, 0x00,
  1557  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1558  		0x00, 0x02, 0x00, 0x00, 0x00, 0x2f, 0x2f, 0x50,
  1559  		0x4b, 0x03, 0x04, 0x0a, 0x00, 0x00, 0x00, 0x00,
  1560  		0x00, 0x78, 0x67, 0x2e, 0x53, 0x00, 0x00, 0x00,
  1561  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1562  		0x00, 0x01, 0x00, 0x00, 0x00, 0x5c, 0x50, 0x4b,
  1563  		0x03, 0x04, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00,
  1564  		0x91, 0x68, 0x2e, 0x53, 0x85, 0x11, 0x4a, 0x0d,
  1565  		0x0b, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00,
  1566  		0x09, 0x00, 0x00, 0x00, 0x2f, 0x74, 0x65, 0x73,
  1567  		0x74, 0x2e, 0x74, 0x78, 0x74, 0x68, 0x65, 0x6c,
  1568  		0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64,
  1569  		0x50, 0x4b, 0x01, 0x02, 0x14, 0x03, 0x0a, 0x00,
  1570  		0x00, 0x08, 0x00, 0x00, 0x06, 0x94, 0x05, 0x53,
  1571  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1572  		0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
  1573  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
  1574  		0xed, 0x41, 0x00, 0x00, 0x00, 0x00, 0x2f, 0x50,
  1575  		0x4b, 0x01, 0x02, 0x3f, 0x00, 0x0a, 0x00, 0x00,
  1576  		0x00, 0x00, 0x00, 0x78, 0x67, 0x2e, 0x53, 0x00,
  1577  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1578  		0x00, 0x00, 0x00, 0x02, 0x00, 0x24, 0x00, 0x00,
  1579  		0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00,
  1580  		0x00, 0x1f, 0x00, 0x00, 0x00, 0x2f, 0x2f, 0x0a,
  1581  		0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
  1582  		0x00, 0x18, 0x00, 0x93, 0x98, 0x25, 0x57, 0x25,
  1583  		0xa9, 0xd7, 0x01, 0x93, 0x98, 0x25, 0x57, 0x25,
  1584  		0xa9, 0xd7, 0x01, 0x93, 0x98, 0x25, 0x57, 0x25,
  1585  		0xa9, 0xd7, 0x01, 0x50, 0x4b, 0x01, 0x02, 0x3f,
  1586  		0x00, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78,
  1587  		0x67, 0x2e, 0x53, 0x00, 0x00, 0x00, 0x00, 0x00,
  1588  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
  1589  		0x00, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1590  		0x00, 0x20, 0x00, 0x00, 0x00, 0x3f, 0x00, 0x00,
  1591  		0x00, 0x5c, 0x0a, 0x00, 0x20, 0x00, 0x00, 0x00,
  1592  		0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x93, 0x98,
  1593  		0x25, 0x57, 0x25, 0xa9, 0xd7, 0x01, 0x93, 0x98,
  1594  		0x25, 0x57, 0x25, 0xa9, 0xd7, 0x01, 0x93, 0x98,
  1595  		0x25, 0x57, 0x25, 0xa9, 0xd7, 0x01, 0x50, 0x4b,
  1596  		0x01, 0x02, 0x3f, 0x00, 0x0a, 0x00, 0x00, 0x00,
  1597  		0x00, 0x00, 0x91, 0x68, 0x2e, 0x53, 0x85, 0x11,
  1598  		0x4a, 0x0d, 0x0b, 0x00, 0x00, 0x00, 0x0b, 0x00,
  1599  		0x00, 0x00, 0x09, 0x00, 0x24, 0x00, 0x00, 0x00,
  1600  		0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00,
  1601  		0x5e, 0x00, 0x00, 0x00, 0x2f, 0x74, 0x65, 0x73,
  1602  		0x74, 0x2e, 0x74, 0x78, 0x74, 0x0a, 0x00, 0x20,
  1603  		0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x18,
  1604  		0x00, 0xa9, 0x80, 0x51, 0x01, 0x26, 0xa9, 0xd7,
  1605  		0x01, 0x31, 0xd1, 0x57, 0x01, 0x26, 0xa9, 0xd7,
  1606  		0x01, 0xdf, 0x48, 0x85, 0xf9, 0x25, 0xa9, 0xd7,
  1607  		0x01, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x00, 0x00,
  1608  		0x00, 0x04, 0x00, 0x04, 0x00, 0x31, 0x01, 0x00,
  1609  		0x00, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00,
  1610  	}
  1611  	r, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1612  	if err != ErrInsecurePath {
  1613  		t.Fatalf("Error reading the archive: %v", err)
  1614  	}
  1615  	entryNames := []string{`/`, `//`, `\`, `/test.txt`}
  1616  	var names []string
  1617  	for _, f := range r.File {
  1618  		names = append(names, f.Name)
  1619  		if _, err := f.Open(); err != nil {
  1620  			t.Errorf("Error opening %q: %v", f.Name, err)
  1621  		}
  1622  		if _, err := r.Open(f.Name); err == nil {
  1623  			t.Errorf("Opening %q with fs.FS API succeeded", f.Name)
  1624  		}
  1625  	}
  1626  	if !slices.Equal(names, entryNames) {
  1627  		t.Errorf("Unexpected file entries: %q", names)
  1628  	}
  1629  	if _, err := r.Open(""); err == nil {
  1630  		t.Errorf("Opening %q with fs.FS API succeeded", "")
  1631  	}
  1632  	if _, err := r.Open("test.txt"); err != nil {
  1633  		t.Errorf("Error opening %q with fs.FS API: %v", "test.txt", err)
  1634  	}
  1635  	dirEntries, err := fs.ReadDir(r, ".")
  1636  	if err != nil {
  1637  		t.Fatalf("Error reading the root directory: %v", err)
  1638  	}
  1639  	if len(dirEntries) != 1 || dirEntries[0].Name() != "test.txt" {
  1640  		t.Errorf("Unexpected directory entries")
  1641  		for _, dirEntry := range dirEntries {
  1642  			_, err := r.Open(dirEntry.Name())
  1643  			t.Logf("%q (Open error: %v)", dirEntry.Name(), err)
  1644  		}
  1645  		t.FailNow()
  1646  	}
  1647  	info, err := dirEntries[0].Info()
  1648  	if err != nil {
  1649  		t.Fatalf("Error reading info entry: %v", err)
  1650  	}
  1651  	if name := info.Name(); name != "test.txt" {
  1652  		t.Errorf("Inconsistent name in info entry: %v", name)
  1653  	}
  1654  }
  1655  
  1656  func TestUnderSize(t *testing.T) {
  1657  	z, err := OpenReader("testdata/readme.zip")
  1658  	if err != nil {
  1659  		t.Fatal(err)
  1660  	}
  1661  	defer z.Close()
  1662  
  1663  	for _, f := range z.File {
  1664  		f.UncompressedSize64 = 1
  1665  	}
  1666  
  1667  	for _, f := range z.File {
  1668  		t.Run(f.Name, func(t *testing.T) {
  1669  			rd, err := f.Open()
  1670  			if err != nil {
  1671  				t.Fatal(err)
  1672  			}
  1673  			defer rd.Close()
  1674  
  1675  			_, err = io.Copy(io.Discard, rd)
  1676  			if err != ErrFormat {
  1677  				t.Fatalf("Error mismatch\n\tGot:  %v\n\tWant: %v", err, ErrFormat)
  1678  			}
  1679  		})
  1680  	}
  1681  }
  1682  
  1683  func TestIssue54801(t *testing.T) {
  1684  	for _, input := range []string{"testdata/readme.zip", "testdata/dd.zip"} {
  1685  		z, err := OpenReader(input)
  1686  		if err != nil {
  1687  			t.Fatal(err)
  1688  		}
  1689  		defer z.Close()
  1690  
  1691  		for _, f := range z.File {
  1692  			// Make file a directory
  1693  			f.Name += "/"
  1694  
  1695  			t.Run(f.Name, func(t *testing.T) {
  1696  				t.Logf("CompressedSize64: %d, Flags: %#x", f.CompressedSize64, f.Flags)
  1697  
  1698  				rd, err := f.Open()
  1699  				if err != nil {
  1700  					t.Fatal(err)
  1701  				}
  1702  				defer rd.Close()
  1703  
  1704  				n, got := io.Copy(io.Discard, rd)
  1705  				if n != 0 || got != ErrFormat {
  1706  					t.Fatalf("Error mismatch, got: %d, %v, want: %v", n, got, ErrFormat)
  1707  				}
  1708  			})
  1709  		}
  1710  	}
  1711  }
  1712  
  1713  func TestInsecurePaths(t *testing.T) {
  1714  	t.Setenv("GODEBUG", "zipinsecurepath=0")
  1715  	for _, path := range []string{
  1716  		"../foo",
  1717  		"/foo",
  1718  		"a/b/../../../c",
  1719  		`a\b`,
  1720  	} {
  1721  		var buf bytes.Buffer
  1722  		zw := NewWriter(&buf)
  1723  		_, err := zw.Create(path)
  1724  		if err != nil {
  1725  			t.Errorf("zw.Create(%q) = %v", path, err)
  1726  			continue
  1727  		}
  1728  		zw.Close()
  1729  
  1730  		zr, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
  1731  		if err != ErrInsecurePath {
  1732  			t.Errorf("NewReader for archive with file %q: got err %v, want ErrInsecurePath", path, err)
  1733  			continue
  1734  		}
  1735  		var gotPaths []string
  1736  		for _, f := range zr.File {
  1737  			gotPaths = append(gotPaths, f.Name)
  1738  		}
  1739  		if !slices.Equal(gotPaths, []string{path}) {
  1740  			t.Errorf("NewReader for archive with file %q: got files %q", path, gotPaths)
  1741  			continue
  1742  		}
  1743  	}
  1744  }
  1745  
  1746  func TestDisableInsecurePathCheck(t *testing.T) {
  1747  	t.Setenv("GODEBUG", "zipinsecurepath=1")
  1748  	var buf bytes.Buffer
  1749  	zw := NewWriter(&buf)
  1750  	const name = "/foo"
  1751  	_, err := zw.Create(name)
  1752  	if err != nil {
  1753  		t.Fatalf("zw.Create(%q) = %v", name, err)
  1754  	}
  1755  	zw.Close()
  1756  	zr, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
  1757  	if err != nil {
  1758  		t.Fatalf("NewReader with zipinsecurepath=1: got err %v, want nil", err)
  1759  	}
  1760  	var gotPaths []string
  1761  	for _, f := range zr.File {
  1762  		gotPaths = append(gotPaths, f.Name)
  1763  	}
  1764  	if want := []string{name}; !slices.Equal(gotPaths, want) {
  1765  		t.Errorf("NewReader with zipinsecurepath=1: got files %q, want %q", gotPaths, want)
  1766  	}
  1767  }
  1768  
  1769  func TestCompressedDirectory(t *testing.T) {
  1770  	// Empty Java JAR, with a compressed directory with uncompressed size 0
  1771  	// which should not fail.
  1772  	//
  1773  	// Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
  1774  	// --------  ------  ------- ---- ---------- ----- --------  ----
  1775  	//        0  Defl:N        2   0% 12-01-2022 16:50 00000000  META-INF/
  1776  	//       60  Defl:N       59   2% 12-01-2022 16:50 af937e93  META-INF/MANIFEST.MF
  1777  	// --------          -------  ---                            -------
  1778  	//       60               61  -2%                            2 files
  1779  	data := []byte{
  1780  		0x50, 0x4b, 0x03, 0x04, 0x14, 0x00, 0x08, 0x08,
  1781  		0x08, 0x00, 0x49, 0x86, 0x81, 0x55, 0x00, 0x00,
  1782  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1783  		0x00, 0x00, 0x09, 0x00, 0x04, 0x00, 0x4d, 0x45,
  1784  		0x54, 0x41, 0x2d, 0x49, 0x4e, 0x46, 0x2f, 0xfe,
  1785  		0xca, 0x00, 0x00, 0x03, 0x00, 0x50, 0x4b, 0x07,
  1786  		0x08, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
  1787  		0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b, 0x03,
  1788  		0x04, 0x14, 0x00, 0x08, 0x08, 0x08, 0x00, 0x49,
  1789  		0x86, 0x81, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00,
  1790  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14,
  1791  		0x00, 0x00, 0x00, 0x4d, 0x45, 0x54, 0x41, 0x2d,
  1792  		0x49, 0x4e, 0x46, 0x2f, 0x4d, 0x41, 0x4e, 0x49,
  1793  		0x46, 0x45, 0x53, 0x54, 0x2e, 0x4d, 0x46, 0xf3,
  1794  		0x4d, 0xcc, 0xcb, 0x4c, 0x4b, 0x2d, 0x2e, 0xd1,
  1795  		0x0d, 0x4b, 0x2d, 0x2a, 0xce, 0xcc, 0xcf, 0xb3,
  1796  		0x52, 0x30, 0xd4, 0x33, 0xe0, 0xe5, 0x72, 0x2e,
  1797  		0x4a, 0x4d, 0x2c, 0x49, 0x4d, 0xd1, 0x75, 0xaa,
  1798  		0x04, 0x0a, 0x00, 0x45, 0xf4, 0x0c, 0x8d, 0x15,
  1799  		0x34, 0xdc, 0xf3, 0xf3, 0xd3, 0x73, 0x52, 0x15,
  1800  		0x3c, 0xf3, 0x92, 0xf5, 0x34, 0x79, 0xb9, 0x78,
  1801  		0xb9, 0x00, 0x50, 0x4b, 0x07, 0x08, 0x93, 0x7e,
  1802  		0x93, 0xaf, 0x3b, 0x00, 0x00, 0x00, 0x3c, 0x00,
  1803  		0x00, 0x00, 0x50, 0x4b, 0x01, 0x02, 0x14, 0x00,
  1804  		0x14, 0x00, 0x08, 0x08, 0x08, 0x00, 0x49, 0x86,
  1805  		0x81, 0x55, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,
  1806  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00,
  1807  		0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1808  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1809  		0x4d, 0x45, 0x54, 0x41, 0x2d, 0x49, 0x4e, 0x46,
  1810  		0x2f, 0xfe, 0xca, 0x00, 0x00, 0x50, 0x4b, 0x01,
  1811  		0x02, 0x14, 0x00, 0x14, 0x00, 0x08, 0x08, 0x08,
  1812  		0x00, 0x49, 0x86, 0x81, 0x55, 0x93, 0x7e, 0x93,
  1813  		0xaf, 0x3b, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00,
  1814  		0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  1815  		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3d,
  1816  		0x00, 0x00, 0x00, 0x4d, 0x45, 0x54, 0x41, 0x2d,
  1817  		0x49, 0x4e, 0x46, 0x2f, 0x4d, 0x41, 0x4e, 0x49,
  1818  		0x46, 0x45, 0x53, 0x54, 0x2e, 0x4d, 0x46, 0x50,
  1819  		0x4b, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0x02,
  1820  		0x00, 0x02, 0x00, 0x7d, 0x00, 0x00, 0x00, 0xba,
  1821  		0x00, 0x00, 0x00, 0x00, 0x00,
  1822  	}
  1823  	r, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1824  	if err != nil {
  1825  		t.Fatalf("unexpected error: %v", err)
  1826  	}
  1827  	for _, f := range r.File {
  1828  		r, err := f.Open()
  1829  		if err != nil {
  1830  			t.Fatalf("unexpected error: %v", err)
  1831  		}
  1832  		if _, err := io.Copy(io.Discard, r); err != nil {
  1833  			t.Fatalf("unexpected error: %v", err)
  1834  		}
  1835  	}
  1836  }
  1837  
  1838  func TestBaseOffsetPlusOverflow(t *testing.T) {
  1839  	// directoryOffset > maxInt64 && size-directoryOffset < 0
  1840  	data := []byte{
  1841  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1842  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1843  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1844  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1845  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1846  		0xff, 0xff, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1847  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1848  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1849  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1850  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1851  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1852  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1853  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1854  		0x20, 0x20, 0x20, 0x50, 0x4b, 0x06, 0x06, 0x20,
  1855  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1856  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1857  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1858  		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  1859  		0x20, 0xff, 0xff, 0x20, 0x00, 0x00, 0x00, 0x00,
  1860  		0x00, 0x00, 0x00, 0x20, 0x08, 0x00, 0x00, 0x00,
  1861  		0x00, 0x00, 0x80, 0x50, 0x4b, 0x06, 0x07, 0x00,
  1862  		0x00, 0x00, 0x00, 0x6b, 0x00, 0x00, 0x00, 0x00,
  1863  		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x50,
  1864  		0x4b, 0x05, 0x06, 0x20, 0x20, 0x20, 0x20, 0xff,
  1865  		0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  1866  		0xff, 0xff, 0xff, 0x20, 0x00,
  1867  	}
  1868  	defer func() {
  1869  		if r := recover(); r != nil {
  1870  			t.Fatalf("NewReader panicked: %s", r)
  1871  		}
  1872  	}()
  1873  	// Previously, this would trigger a panic as we attempt to read from
  1874  	// an io.SectionReader which would access a slice at a negative offset
  1875  	// as the section reader offset & size were < 0.
  1876  	NewReader(bytes.NewReader(data), int64(len(data))+1875)
  1877  }
  1878  
  1879  func BenchmarkReaderOneDeepDir(b *testing.B) {
  1880  	var buf bytes.Buffer
  1881  	zw := NewWriter(&buf)
  1882  
  1883  	for i := range 4000 {
  1884  		name := strings.Repeat("a/", i) + "data"
  1885  		zw.CreateHeader(&FileHeader{
  1886  			Name:   name,
  1887  			Method: Store,
  1888  		})
  1889  	}
  1890  
  1891  	if err := zw.Close(); err != nil {
  1892  		b.Fatal(err)
  1893  	}
  1894  	data := buf.Bytes()
  1895  
  1896  	for b.Loop() {
  1897  		zr, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1898  		if err != nil {
  1899  			b.Fatal(err)
  1900  		}
  1901  		zr.Open("does-not-exist")
  1902  	}
  1903  }
  1904  
  1905  func BenchmarkReaderManyDeepDirs(b *testing.B) {
  1906  	var buf bytes.Buffer
  1907  	zw := NewWriter(&buf)
  1908  
  1909  	for i := range 2850 {
  1910  		name := fmt.Sprintf("%x", i)
  1911  		name = strings.Repeat("/"+name, i+1)[1:]
  1912  
  1913  		zw.CreateHeader(&FileHeader{
  1914  			Name:   name,
  1915  			Method: Store,
  1916  		})
  1917  	}
  1918  
  1919  	if err := zw.Close(); err != nil {
  1920  		b.Fatal(err)
  1921  	}
  1922  	data := buf.Bytes()
  1923  
  1924  	for b.Loop() {
  1925  		zr, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1926  		if err != nil {
  1927  			b.Fatal(err)
  1928  		}
  1929  		zr.Open("does-not-exist")
  1930  	}
  1931  }
  1932  
  1933  func BenchmarkReaderManyShallowFiles(b *testing.B) {
  1934  	var buf bytes.Buffer
  1935  	zw := NewWriter(&buf)
  1936  
  1937  	for i := range 310000 {
  1938  		name := fmt.Sprintf("%v", i)
  1939  		zw.CreateHeader(&FileHeader{
  1940  			Name:   name,
  1941  			Method: Store,
  1942  		})
  1943  	}
  1944  
  1945  	if err := zw.Close(); err != nil {
  1946  		b.Fatal(err)
  1947  	}
  1948  	data := buf.Bytes()
  1949  
  1950  	for b.Loop() {
  1951  		zr, err := NewReader(bytes.NewReader(data), int64(len(data)))
  1952  		if err != nil {
  1953  			b.Fatal(err)
  1954  		}
  1955  		zr.Open("does-not-exist")
  1956  	}
  1957  }
  1958  

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