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// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package tar import ( "bytes" "compress/bzip2" "crypto/md5" "errors" "fmt" "io" "math" "os" "path" "reflect" "strconv" "strings" "testing" "time" ) func TestReader(t *testing.T) { vectors := []struct { file string // Test input file headers []*Header // Expected output headers chksums []string // MD5 checksum of files, leave as nil if not checked err error // Expected error to occur }{{ file: "testdata/gnu.tar", headers: []*Header{{ Name: "small.txt", Mode: 0640, Uid: 73025, Gid: 5000, Size: 5, ModTime: time.Unix(1244428340, 0), Typeflag: '0', Uname: "dsymonds", Gname: "eng", Format: FormatGNU, }, { Name: "small2.txt", Mode: 0640, Uid: 73025, Gid: 5000, Size: 11, ModTime: time.Unix(1244436044, 0), Typeflag: '0', Uname: "dsymonds", Gname: "eng", Format: FormatGNU, }}, chksums: []string{ "e38b27eaccb4391bdec553a7f3ae6b2f", "c65bd2e50a56a2138bf1716f2fd56fe9", }, }, { file: "testdata/sparse-formats.tar", headers: []*Header{{ Name: "sparse-gnu", Mode: 420, Uid: 1000, Gid: 1000, Size: 200, ModTime: time.Unix(1392395740, 0), Typeflag: 0x53, Linkname: "", Uname: "david", Gname: "david", Devmajor: 0, Devminor: 0, Format: FormatGNU, }, { Name: "sparse-posix-0.0", Mode: 420, Uid: 1000, Gid: 1000, Size: 200, ModTime: time.Unix(1392342187, 0), Typeflag: 0x30, Linkname: "", Uname: "david", Gname: "david", Devmajor: 0, Devminor: 0, PAXRecords: map[string]string{ "GNU.sparse.size": "200", "GNU.sparse.numblocks": "95", "GNU.sparse.map": "1,1,3,1,5,1,7,1,9,1,11,1,13,1,15,1,17,1,19,1,21,1,23,1,25,1,27,1,29,1,31,1,33,1,35,1,37,1,39,1,41,1,43,1,45,1,47,1,49,1,51,1,53,1,55,1,57,1,59,1,61,1,63,1,65,1,67,1,69,1,71,1,73,1,75,1,77,1,79,1,81,1,83,1,85,1,87,1,89,1,91,1,93,1,95,1,97,1,99,1,101,1,103,1,105,1,107,1,109,1,111,1,113,1,115,1,117,1,119,1,121,1,123,1,125,1,127,1,129,1,131,1,133,1,135,1,137,1,139,1,141,1,143,1,145,1,147,1,149,1,151,1,153,1,155,1,157,1,159,1,161,1,163,1,165,1,167,1,169,1,171,1,173,1,175,1,177,1,179,1,181,1,183,1,185,1,187,1,189,1", }, Format: FormatPAX, }, { Name: "sparse-posix-0.1", Mode: 420, Uid: 1000, Gid: 1000, Size: 200, ModTime: time.Unix(1392340456, 0), Typeflag: 0x30, Linkname: "", Uname: "david", Gname: "david", Devmajor: 0, Devminor: 0, PAXRecords: map[string]string{ "GNU.sparse.size": "200", "GNU.sparse.numblocks": "95", "GNU.sparse.map": "1,1,3,1,5,1,7,1,9,1,11,1,13,1,15,1,17,1,19,1,21,1,23,1,25,1,27,1,29,1,31,1,33,1,35,1,37,1,39,1,41,1,43,1,45,1,47,1,49,1,51,1,53,1,55,1,57,1,59,1,61,1,63,1,65,1,67,1,69,1,71,1,73,1,75,1,77,1,79,1,81,1,83,1,85,1,87,1,89,1,91,1,93,1,95,1,97,1,99,1,101,1,103,1,105,1,107,1,109,1,111,1,113,1,115,1,117,1,119,1,121,1,123,1,125,1,127,1,129,1,131,1,133,1,135,1,137,1,139,1,141,1,143,1,145,1,147,1,149,1,151,1,153,1,155,1,157,1,159,1,161,1,163,1,165,1,167,1,169,1,171,1,173,1,175,1,177,1,179,1,181,1,183,1,185,1,187,1,189,1", "GNU.sparse.name": "sparse-posix-0.1", }, Format: FormatPAX, }, { Name: "sparse-posix-1.0", Mode: 420, Uid: 1000, Gid: 1000, Size: 200, ModTime: time.Unix(1392337404, 0), Typeflag: 0x30, Linkname: "", Uname: "david", Gname: "david", Devmajor: 0, Devminor: 0, PAXRecords: map[string]string{ "GNU.sparse.major": "1", "GNU.sparse.minor": "0", "GNU.sparse.realsize": "200", "GNU.sparse.name": "sparse-posix-1.0", }, Format: FormatPAX, }, { Name: "end", Mode: 420, Uid: 1000, Gid: 1000, Size: 4, ModTime: time.Unix(1392398319, 0), Typeflag: 0x30, Linkname: "", Uname: "david", Gname: "david", Devmajor: 0, Devminor: 0, Format: FormatGNU, }}, chksums: []string{ "6f53234398c2449fe67c1812d993012f", "6f53234398c2449fe67c1812d993012f", "6f53234398c2449fe67c1812d993012f", "6f53234398c2449fe67c1812d993012f", "b0061974914468de549a2af8ced10316", }, }, { file: "testdata/star.tar", headers: []*Header{{ Name: "small.txt", Mode: 0640, Uid: 73025, Gid: 5000, Size: 5, ModTime: time.Unix(1244592783, 0), Typeflag: '0', Uname: "dsymonds", Gname: "eng", AccessTime: time.Unix(1244592783, 0), ChangeTime: time.Unix(1244592783, 0), }, { Name: "small2.txt", Mode: 0640, Uid: 73025, Gid: 5000, Size: 11, ModTime: time.Unix(1244592783, 0), Typeflag: '0', Uname: "dsymonds", Gname: "eng", AccessTime: time.Unix(1244592783, 0), ChangeTime: time.Unix(1244592783, 0), }}, }, { file: "testdata/v7.tar", headers: []*Header{{ Name: "small.txt", Mode: 0444, Uid: 73025, Gid: 5000, Size: 5, ModTime: time.Unix(1244593104, 0), Typeflag: '0', }, { Name: "small2.txt", Mode: 0444, Uid: 73025, Gid: 5000, Size: 11, ModTime: time.Unix(1244593104, 0), Typeflag: '0', }}, }, { file: "testdata/pax.tar", headers: []*Header{{ Name: "a/123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100", Mode: 0664, Uid: 1000, Gid: 1000, Uname: "shane", Gname: "shane", Size: 7, ModTime: time.Unix(1350244992, 23960108), ChangeTime: time.Unix(1350244992, 23960108), AccessTime: time.Unix(1350244992, 23960108), Typeflag: TypeReg, PAXRecords: map[string]string{ "path": "a/123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100", "mtime": "1350244992.023960108", "atime": "1350244992.023960108", "ctime": "1350244992.023960108", }, Format: FormatPAX, }, { Name: "a/b", Mode: 0777, Uid: 1000, Gid: 1000, Uname: "shane", Gname: "shane", Size: 0, ModTime: time.Unix(1350266320, 910238425), ChangeTime: time.Unix(1350266320, 910238425), AccessTime: time.Unix(1350266320, 910238425), Typeflag: TypeSymlink, Linkname: "123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100", PAXRecords: map[string]string{ "linkpath": "123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100", "mtime": "1350266320.910238425", "atime": "1350266320.910238425", "ctime": "1350266320.910238425", }, Format: FormatPAX, }}, }, { file: "testdata/pax-bad-hdr-file.tar", err: ErrHeader, }, { file: "testdata/pax-bad-hdr-large.tar.bz2", err: ErrFieldTooLong, }, { file: "testdata/pax-bad-mtime-file.tar", err: ErrHeader, }, { file: "testdata/pax-pos-size-file.tar", headers: []*Header{{ Name: "foo", Mode: 0640, Uid: 319973, Gid: 5000, Size: 999, ModTime: time.Unix(1442282516, 0), Typeflag: '0', Uname: "joetsai", Gname: "eng", PAXRecords: map[string]string{ "size": "000000000000000000000999", }, Format: FormatPAX, }}, chksums: []string{ "0afb597b283fe61b5d4879669a350556", }, }, { file: "testdata/pax-records.tar", headers: []*Header{{ Typeflag: TypeReg, Name: "file", Uname: strings.Repeat("long", 10), ModTime: time.Unix(0, 0), PAXRecords: map[string]string{ "GOLANG.pkg": "tar", "comment": "Hello, 世界", "uname": strings.Repeat("long", 10), }, Format: FormatPAX, }}, }, { file: "testdata/pax-global-records.tar", headers: []*Header{{ Typeflag: TypeXGlobalHeader, Name: "global1", PAXRecords: map[string]string{"path": "global1", "mtime": "1500000000.0"}, Format: FormatPAX, }, { Typeflag: TypeReg, Name: "file1", ModTime: time.Unix(0, 0), Format: FormatUSTAR, }, { Typeflag: TypeReg, Name: "file2", PAXRecords: map[string]string{"path": "file2"}, ModTime: time.Unix(0, 0), Format: FormatPAX, }, { Typeflag: TypeXGlobalHeader, Name: "GlobalHead.0.0", PAXRecords: map[string]string{"path": ""}, Format: FormatPAX, }, { Typeflag: TypeReg, Name: "file3", ModTime: time.Unix(0, 0), Format: FormatUSTAR, }, { Typeflag: TypeReg, Name: "file4", ModTime: time.Unix(1400000000, 0), PAXRecords: map[string]string{"mtime": "1400000000"}, Format: FormatPAX, }}, }, { file: "testdata/nil-uid.tar", // golang.org/issue/5290 headers: []*Header{{ Name: "P1050238.JPG.log", Mode: 0664, Uid: 0, Gid: 0, Size: 14, ModTime: time.Unix(1365454838, 0), Typeflag: TypeReg, Linkname: "", Uname: "eyefi", Gname: "eyefi", Devmajor: 0, Devminor: 0, Format: FormatGNU, }}, }, { file: "testdata/xattrs.tar", headers: []*Header{{ Name: "small.txt", Mode: 0644, Uid: 1000, Gid: 10, Size: 5, ModTime: time.Unix(1386065770, 448252320), Typeflag: '0', Uname: "alex", Gname: "wheel", AccessTime: time.Unix(1389782991, 419875220), ChangeTime: time.Unix(1389782956, 794414986), Xattrs: map[string]string{ "user.key": "value", "user.key2": "value2", // Interestingly, selinux encodes the terminating null inside the xattr "security.selinux": "unconfined_u:object_r:default_t:s0\x00", }, PAXRecords: map[string]string{ "mtime": "1386065770.44825232", "atime": "1389782991.41987522", "ctime": "1389782956.794414986", "SCHILY.xattr.user.key": "value", "SCHILY.xattr.user.key2": "value2", "SCHILY.xattr.security.selinux": "unconfined_u:object_r:default_t:s0\x00", }, Format: FormatPAX, }, { Name: "small2.txt", Mode: 0644, Uid: 1000, Gid: 10, Size: 11, ModTime: time.Unix(1386065770, 449252304), Typeflag: '0', Uname: "alex", Gname: "wheel", AccessTime: time.Unix(1389782991, 419875220), ChangeTime: time.Unix(1386065770, 449252304), Xattrs: map[string]string{ "security.selinux": "unconfined_u:object_r:default_t:s0\x00", }, PAXRecords: map[string]string{ "mtime": "1386065770.449252304", "atime": "1389782991.41987522", "ctime": "1386065770.449252304", "SCHILY.xattr.security.selinux": "unconfined_u:object_r:default_t:s0\x00", }, Format: FormatPAX, }}, }, { // Matches the behavior of GNU, BSD, and STAR tar utilities. file: "testdata/gnu-multi-hdrs.tar", headers: []*Header{{ Name: "GNU2/GNU2/long-path-name", Linkname: "GNU4/GNU4/long-linkpath-name", ModTime: time.Unix(0, 0), Typeflag: '2', Format: FormatGNU, }}, }, { // GNU tar file with atime and ctime fields set. // Created with the GNU tar v1.27.1. // tar --incremental -S -cvf gnu-incremental.tar test2 file: "testdata/gnu-incremental.tar", headers: []*Header{{ Name: "test2/", Mode: 16877, Uid: 1000, Gid: 1000, Size: 14, ModTime: time.Unix(1441973427, 0), Typeflag: 'D', Uname: "rawr", Gname: "dsnet", AccessTime: time.Unix(1441974501, 0), ChangeTime: time.Unix(1441973436, 0), Format: FormatGNU, }, { Name: "test2/foo", Mode: 33188, Uid: 1000, Gid: 1000, Size: 64, ModTime: time.Unix(1441973363, 0), Typeflag: '0', Uname: "rawr", Gname: "dsnet", AccessTime: time.Unix(1441974501, 0), ChangeTime: time.Unix(1441973436, 0), Format: FormatGNU, }, { Name: "test2/sparse", Mode: 33188, Uid: 1000, Gid: 1000, Size: 536870912, ModTime: time.Unix(1441973427, 0), Typeflag: 'S', Uname: "rawr", Gname: "dsnet", AccessTime: time.Unix(1441991948, 0), ChangeTime: time.Unix(1441973436, 0), Format: FormatGNU, }}, }, { // Matches the behavior of GNU and BSD tar utilities. file: "testdata/pax-multi-hdrs.tar", headers: []*Header{{ Name: "bar", Linkname: "PAX4/PAX4/long-linkpath-name", ModTime: time.Unix(0, 0), Typeflag: '2', PAXRecords: map[string]string{ "linkpath": "PAX4/PAX4/long-linkpath-name", }, Format: FormatPAX, }}, }, { // Both BSD and GNU tar truncate long names at first NUL even // if there is data following that NUL character. // This is reasonable as GNU long names are C-strings. file: "testdata/gnu-long-nul.tar", headers: []*Header{{ Name: "0123456789", Mode: 0644, Uid: 1000, Gid: 1000, ModTime: time.Unix(1486082191, 0), Typeflag: '0', Uname: "rawr", Gname: "dsnet", Format: FormatGNU, }}, }, { // This archive was generated by Writer but is readable by both // GNU and BSD tar utilities. // The archive generated by GNU is nearly byte-for-byte identical // to the Go version except the Go version sets a negative Devminor // just to force the GNU format. file: "testdata/gnu-utf8.tar", headers: []*Header{{ Name: "☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹", Mode: 0644, Uid: 1000, Gid: 1000, ModTime: time.Unix(0, 0), Typeflag: '0', Uname: "☺", Gname: "⚹", Format: FormatGNU, }}, }, { // This archive was generated by Writer but is readable by both // GNU and BSD tar utilities. // The archive generated by GNU is nearly byte-for-byte identical // to the Go version except the Go version sets a negative Devminor // just to force the GNU format. file: "testdata/gnu-not-utf8.tar", headers: []*Header{{ Name: "hi\x80\x81\x82\x83bye", Mode: 0644, Uid: 1000, Gid: 1000, ModTime: time.Unix(0, 0), Typeflag: '0', Uname: "rawr", Gname: "dsnet", Format: FormatGNU, }}, }, { // BSD tar v3.1.2 and GNU tar v1.27.1 both rejects PAX records // with NULs in the key. file: "testdata/pax-nul-xattrs.tar", err: ErrHeader, }, { // BSD tar v3.1.2 rejects a PAX path with NUL in the value, while // GNU tar v1.27.1 simply truncates at first NUL. // We emulate the behavior of BSD since it is strange doing NUL // truncations since PAX records are length-prefix strings instead // of NUL-terminated C-strings. file: "testdata/pax-nul-path.tar", err: ErrHeader, }, { file: "testdata/neg-size.tar", err: ErrHeader, }, { file: "testdata/issue10968.tar", err: ErrHeader, }, { file: "testdata/issue11169.tar", err: ErrHeader, }, { file: "testdata/issue12435.tar", err: ErrHeader, }, { // Ensure that we can read back the original Header as written with // a buggy pre-Go1.8 tar.Writer. file: "testdata/invalid-go17.tar", headers: []*Header{{ Name: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/foo", Uid: 010000000, ModTime: time.Unix(0, 0), Typeflag: '0', }}, }, { // USTAR archive with a regular entry with non-zero device numbers. file: "testdata/ustar-file-devs.tar", headers: []*Header{{ Name: "file", Mode: 0644, Typeflag: '0', ModTime: time.Unix(0, 0), Devmajor: 1, Devminor: 1, Format: FormatUSTAR, }}, }, { // Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1. file: "testdata/gnu-nil-sparse-data.tar", headers: []*Header{{ Name: "sparse.db", Typeflag: TypeGNUSparse, Size: 1000, ModTime: time.Unix(0, 0), Format: FormatGNU, }}, }, { // Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1. file: "testdata/gnu-nil-sparse-hole.tar", headers: []*Header{{ Name: "sparse.db", Typeflag: TypeGNUSparse, Size: 1000, ModTime: time.Unix(0, 0), Format: FormatGNU, }}, }, { // Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1. file: "testdata/pax-nil-sparse-data.tar", headers: []*Header{{ Name: "sparse.db", Typeflag: TypeReg, Size: 1000, ModTime: time.Unix(0, 0), PAXRecords: map[string]string{ "size": "1512", "GNU.sparse.major": "1", "GNU.sparse.minor": "0", "GNU.sparse.realsize": "1000", "GNU.sparse.name": "sparse.db", }, Format: FormatPAX, }}, }, { // Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1. file: "testdata/pax-nil-sparse-hole.tar", headers: []*Header{{ Name: "sparse.db", Typeflag: TypeReg, Size: 1000, ModTime: time.Unix(0, 0), PAXRecords: map[string]string{ "size": "512", "GNU.sparse.major": "1", "GNU.sparse.minor": "0", "GNU.sparse.realsize": "1000", "GNU.sparse.name": "sparse.db", }, Format: FormatPAX, }}, }, { file: "testdata/trailing-slash.tar", headers: []*Header{{ Typeflag: TypeDir, Name: strings.Repeat("123456789/", 30), ModTime: time.Unix(0, 0), PAXRecords: map[string]string{ "path": strings.Repeat("123456789/", 30), }, Format: FormatPAX, }}, }} for _, v := range vectors { t.Run(path.Base(v.file), func(t *testing.T) { f, err := os.Open(v.file) if err != nil { t.Fatalf("unexpected error: %v", err) } defer f.Close() var fr io.Reader = f if strings.HasSuffix(v.file, ".bz2") { fr = bzip2.NewReader(fr) } // Capture all headers and checksums. var ( tr = NewReader(fr) hdrs []*Header chksums []string rdbuf = make([]byte, 8) ) for { var hdr *Header hdr, err = tr.Next() if err != nil { if err == io.EOF { err = nil // Expected error } break } hdrs = append(hdrs, hdr) if v.chksums == nil { continue } h := md5.New() _, err = io.CopyBuffer(h, tr, rdbuf) // Effectively an incremental read if err != nil { break } chksums = append(chksums, fmt.Sprintf("%x", h.Sum(nil))) } for i, hdr := range hdrs { if i >= len(v.headers) { t.Fatalf("entry %d: unexpected header:\ngot %+v", i, *hdr) } if !reflect.DeepEqual(*hdr, *v.headers[i]) { t.Fatalf("entry %d: incorrect header:\ngot %+v\nwant %+v", i, *hdr, *v.headers[i]) } } if len(hdrs) != len(v.headers) { t.Fatalf("got %d headers, want %d headers", len(hdrs), len(v.headers)) } for i, sum := range chksums { if i >= len(v.chksums) { t.Fatalf("entry %d: unexpected sum: got %s", i, sum) } if sum != v.chksums[i] { t.Fatalf("entry %d: incorrect checksum: got %s, want %s", i, sum, v.chksums[i]) } } if err != v.err { t.Fatalf("unexpected error: got %v, want %v", err, v.err) } f.Close() }) } } func TestPartialRead(t *testing.T) { type testCase struct { cnt int // Number of bytes to read output string // Expected value of string read } vectors := []struct { file string cases []testCase }{{ file: "testdata/gnu.tar", cases: []testCase{ {4, "Kilt"}, {6, "Google"}, }, }, { file: "testdata/sparse-formats.tar", cases: []testCase{ {2, "\x00G"}, {4, "\x00G\x00o"}, {6, "\x00G\x00o\x00G"}, {8, "\x00G\x00o\x00G\x00o"}, {4, "end\n"}, }, }} for _, v := range vectors { t.Run(path.Base(v.file), func(t *testing.T) { f, err := os.Open(v.file) if err != nil { t.Fatalf("Open() error: %v", err) } defer f.Close() tr := NewReader(f) for i, tc := range v.cases { hdr, err := tr.Next() if err != nil || hdr == nil { t.Fatalf("entry %d, Next(): got %v, want %v", i, err, nil) } buf := make([]byte, tc.cnt) if _, err := io.ReadFull(tr, buf); err != nil { t.Fatalf("entry %d, ReadFull(): got %v, want %v", i, err, nil) } if string(buf) != tc.output { t.Fatalf("entry %d, ReadFull(): got %q, want %q", i, string(buf), tc.output) } } if _, err := tr.Next(); err != io.EOF { t.Fatalf("Next(): got %v, want EOF", err) } }) } } func TestUninitializedRead(t *testing.T) { f, err := os.Open("testdata/gnu.tar") if err != nil { t.Fatalf("Unexpected error: %v", err) } defer f.Close() tr := NewReader(f) _, err = tr.Read([]byte{}) if err == nil || err != io.EOF { t.Errorf("Unexpected error: %v, wanted %v", err, io.EOF) } } type reader struct{ io.Reader } type readSeeker struct{ io.ReadSeeker } type readBadSeeker struct{ io.ReadSeeker } func (rbs *readBadSeeker) Seek(int64, int) (int64, error) { return 0, fmt.Errorf("illegal seek") } // TestReadTruncation test the ending condition on various truncated files and // that truncated files are still detected even if the underlying io.Reader // satisfies io.Seeker. func TestReadTruncation(t *testing.T) { var ss []string for _, p := range []string{ "testdata/gnu.tar", "testdata/ustar-file-reg.tar", "testdata/pax-path-hdr.tar", "testdata/sparse-formats.tar", } { buf, err := os.ReadFile(p) if err != nil { t.Fatalf("unexpected error: %v", err) } ss = append(ss, string(buf)) } data1, data2, pax, sparse := ss[0], ss[1], ss[2], ss[3] data2 += strings.Repeat("\x00", 10*512) trash := strings.Repeat("garbage ", 64) // Exactly 512 bytes vectors := []struct { input string // Input stream cnt int // Expected number of headers read err error // Expected error outcome }{ {"", 0, io.EOF}, // Empty file is a "valid" tar file {data1[:511], 0, io.ErrUnexpectedEOF}, {data1[:512], 1, io.ErrUnexpectedEOF}, {data1[:1024], 1, io.EOF}, {data1[:1536], 2, io.ErrUnexpectedEOF}, {data1[:2048], 2, io.EOF}, {data1, 2, io.EOF}, {data1[:2048] + data2[:1536], 3, io.EOF}, {data2[:511], 0, io.ErrUnexpectedEOF}, {data2[:512], 1, io.ErrUnexpectedEOF}, {data2[:1195], 1, io.ErrUnexpectedEOF}, {data2[:1196], 1, io.EOF}, // Exact end of data and start of padding {data2[:1200], 1, io.EOF}, {data2[:1535], 1, io.EOF}, {data2[:1536], 1, io.EOF}, // Exact end of padding {data2[:1536] + trash[:1], 1, io.ErrUnexpectedEOF}, {data2[:1536] + trash[:511], 1, io.ErrUnexpectedEOF}, {data2[:1536] + trash, 1, ErrHeader}, {data2[:2048], 1, io.EOF}, // Exactly 1 empty block {data2[:2048] + trash[:1], 1, io.ErrUnexpectedEOF}, {data2[:2048] + trash[:511], 1, io.ErrUnexpectedEOF}, {data2[:2048] + trash, 1, ErrHeader}, {data2[:2560], 1, io.EOF}, // Exactly 2 empty blocks (normal end-of-stream) {data2[:2560] + trash[:1], 1, io.EOF}, {data2[:2560] + trash[:511], 1, io.EOF}, {data2[:2560] + trash, 1, io.EOF}, {data2[:3072], 1, io.EOF}, {pax, 0, io.EOF}, // PAX header without data is a "valid" tar file {pax + trash[:1], 0, io.ErrUnexpectedEOF}, {pax + trash[:511], 0, io.ErrUnexpectedEOF}, {sparse[:511], 0, io.ErrUnexpectedEOF}, {sparse[:512], 0, io.ErrUnexpectedEOF}, {sparse[:3584], 1, io.EOF}, {sparse[:9200], 1, io.EOF}, // Terminate in padding of sparse header {sparse[:9216], 1, io.EOF}, {sparse[:9728], 2, io.ErrUnexpectedEOF}, {sparse[:10240], 2, io.EOF}, {sparse[:11264], 2, io.ErrUnexpectedEOF}, {sparse, 5, io.EOF}, {sparse + trash, 5, io.EOF}, } for i, v := range vectors { for j := 0; j < 6; j++ { var tr *Reader var s1, s2 string switch j { case 0: tr = NewReader(&reader{strings.NewReader(v.input)}) s1, s2 = "io.Reader", "auto" case 1: tr = NewReader(&reader{strings.NewReader(v.input)}) s1, s2 = "io.Reader", "manual" case 2: tr = NewReader(&readSeeker{strings.NewReader(v.input)}) s1, s2 = "io.ReadSeeker", "auto" case 3: tr = NewReader(&readSeeker{strings.NewReader(v.input)}) s1, s2 = "io.ReadSeeker", "manual" case 4: tr = NewReader(&readBadSeeker{strings.NewReader(v.input)}) s1, s2 = "ReadBadSeeker", "auto" case 5: tr = NewReader(&readBadSeeker{strings.NewReader(v.input)}) s1, s2 = "ReadBadSeeker", "manual" } var cnt int var err error for { if _, err = tr.Next(); err != nil { break } cnt++ if s2 == "manual" { if _, err = tr.writeTo(io.Discard); err != nil { break } } } if err != v.err { t.Errorf("test %d, NewReader(%s) with %s discard: got %v, want %v", i, s1, s2, err, v.err) } if cnt != v.cnt { t.Errorf("test %d, NewReader(%s) with %s discard: got %d headers, want %d headers", i, s1, s2, cnt, v.cnt) } } } } // TestReadHeaderOnly tests that Reader does not attempt to read special // header-only files. func TestReadHeaderOnly(t *testing.T) { f, err := os.Open("testdata/hdr-only.tar") if err != nil { t.Fatalf("unexpected error: %v", err) } defer f.Close() var hdrs []*Header tr := NewReader(f) for { hdr, err := tr.Next() if err == io.EOF { break } if err != nil { t.Errorf("Next(): got %v, want %v", err, nil) continue } hdrs = append(hdrs, hdr) // If a special flag, we should read nothing. cnt, _ := io.ReadFull(tr, []byte{0}) if cnt > 0 && hdr.Typeflag != TypeReg { t.Errorf("ReadFull(...): got %d bytes, want 0 bytes", cnt) } } // File is crafted with 16 entries. The later 8 are identical to the first // 8 except that the size is set. if len(hdrs) != 16 { t.Fatalf("len(hdrs): got %d, want %d", len(hdrs), 16) } for i := 0; i < 8; i++ { hdr1, hdr2 := hdrs[i+0], hdrs[i+8] hdr1.Size, hdr2.Size = 0, 0 if !reflect.DeepEqual(*hdr1, *hdr2) { t.Errorf("incorrect header:\ngot %+v\nwant %+v", *hdr1, *hdr2) } } } func TestMergePAX(t *testing.T) { vectors := []struct { in map[string]string want *Header ok bool }{{ in: map[string]string{ "path": "a/b/c", "uid": "1000", "mtime": "1350244992.023960108", }, want: &Header{ Name: "a/b/c", Uid: 1000, ModTime: time.Unix(1350244992, 23960108), PAXRecords: map[string]string{ "path": "a/b/c", "uid": "1000", "mtime": "1350244992.023960108", }, }, ok: true, }, { in: map[string]string{ "gid": "gtgergergersagersgers", }, ok: false, }, { in: map[string]string{ "missing": "missing", "SCHILY.xattr.key": "value", }, want: &Header{ Xattrs: map[string]string{"key": "value"}, PAXRecords: map[string]string{ "missing": "missing", "SCHILY.xattr.key": "value", }, }, ok: true, }} for i, v := range vectors { got := new(Header) err := mergePAX(got, v.in) if v.ok && !reflect.DeepEqual(*got, *v.want) { t.Errorf("test %d, mergePAX(...):\ngot %+v\nwant %+v", i, *got, *v.want) } if ok := err == nil; ok != v.ok { t.Errorf("test %d, mergePAX(...): got %v, want %v", i, ok, v.ok) } } } func TestParsePAX(t *testing.T) { vectors := []struct { in string want map[string]string ok bool }{ {"", nil, true}, {"6 k=1\n", map[string]string{"k": "1"}, true}, {"10 a=name\n", map[string]string{"a": "name"}, true}, {"9 a=name\n", map[string]string{"a": "name"}, true}, {"30 mtime=1350244992.023960108\n", map[string]string{"mtime": "1350244992.023960108"}, true}, {"3 somelongkey=\n", nil, false}, {"50 tooshort=\n", nil, false}, {"13 key1=haha\n13 key2=nana\n13 key3=kaka\n", map[string]string{"key1": "haha", "key2": "nana", "key3": "kaka"}, true}, {"13 key1=val1\n13 key2=val2\n8 key1=\n", map[string]string{"key1": "", "key2": "val2"}, true}, {"22 GNU.sparse.size=10\n26 GNU.sparse.numblocks=2\n" + "23 GNU.sparse.offset=1\n25 GNU.sparse.numbytes=2\n" + "23 GNU.sparse.offset=3\n25 GNU.sparse.numbytes=4\n", map[string]string{paxGNUSparseSize: "10", paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "1,2,3,4"}, true}, {"22 GNU.sparse.size=10\n26 GNU.sparse.numblocks=1\n" + "25 GNU.sparse.numbytes=2\n23 GNU.sparse.offset=1\n", nil, false}, {"22 GNU.sparse.size=10\n26 GNU.sparse.numblocks=1\n" + "25 GNU.sparse.offset=1,2\n25 GNU.sparse.numbytes=2\n", nil, false}, } for i, v := range vectors { r := strings.NewReader(v.in) got, err := parsePAX(r) if !reflect.DeepEqual(got, v.want) && !(len(got) == 0 && len(v.want) == 0) { t.Errorf("test %d, parsePAX():\ngot %v\nwant %v", i, got, v.want) } if ok := err == nil; ok != v.ok { t.Errorf("test %d, parsePAX(): got %v, want %v", i, ok, v.ok) } } } func TestReadOldGNUSparseMap(t *testing.T) { populateSparseMap := func(sa sparseArray, sps []string) []string { for i := 0; len(sps) > 0 && i < sa.maxEntries(); i++ { copy(sa.entry(i), sps[0]) sps = sps[1:] } if len(sps) > 0 { copy(sa.isExtended(), "\x80") } return sps } makeInput := func(format Format, size string, sps ...string) (out []byte) { // Write the initial GNU header. var blk block gnu := blk.toGNU() sparse := gnu.sparse() copy(gnu.realSize(), size) sps = populateSparseMap(sparse, sps) if format != FormatUnknown { blk.setFormat(format) } out = append(out, blk[:]...) // Write extended sparse blocks. for len(sps) > 0 { var blk block sps = populateSparseMap(blk.toSparse(), sps) out = append(out, blk[:]...) } return out } makeSparseStrings := func(sp []sparseEntry) (out []string) { var f formatter for _, s := range sp { var b [24]byte f.formatNumeric(b[:12], s.Offset) f.formatNumeric(b[12:], s.Length) out = append(out, string(b[:])) } return out } vectors := []struct { input []byte wantMap sparseDatas wantSize int64 wantErr error }{{ input: makeInput(FormatUnknown, ""), wantErr: ErrHeader, }, { input: makeInput(FormatGNU, "1234", "fewa"), wantSize: 01234, wantErr: ErrHeader, }, { input: makeInput(FormatGNU, "0031"), wantSize: 031, }, { input: makeInput(FormatGNU, "80"), wantErr: ErrHeader, }, { input: makeInput(FormatGNU, "1234", makeSparseStrings(sparseDatas{{0, 0}, {1, 1}})...), wantMap: sparseDatas{{0, 0}, {1, 1}}, wantSize: 01234, }, { input: makeInput(FormatGNU, "1234", append(makeSparseStrings(sparseDatas{{0, 0}, {1, 1}}), []string{"", "blah"}...)...), wantMap: sparseDatas{{0, 0}, {1, 1}}, wantSize: 01234, }, { input: makeInput(FormatGNU, "3333", makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}})...), wantMap: sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}}, wantSize: 03333, }, { input: makeInput(FormatGNU, "", append(append( makeSparseStrings(sparseDatas{{0, 1}, {2, 1}}), []string{"", ""}...), makeSparseStrings(sparseDatas{{4, 1}, {6, 1}})...)...), wantMap: sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}}, }, { input: makeInput(FormatGNU, "", makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}})...)[:blockSize], wantErr: io.ErrUnexpectedEOF, }, { input: makeInput(FormatGNU, "", makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}})...)[:3*blockSize/2], wantErr: io.ErrUnexpectedEOF, }, { input: makeInput(FormatGNU, "", makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}})...), wantMap: sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}}, }, { input: makeInput(FormatGNU, "", makeSparseStrings(sparseDatas{{10 << 30, 512}, {20 << 30, 512}})...), wantMap: sparseDatas{{10 << 30, 512}, {20 << 30, 512}}, }} for i, v := range vectors { var blk block var hdr Header v.input = v.input[copy(blk[:], v.input):] tr := Reader{r: bytes.NewReader(v.input)} got, err := tr.readOldGNUSparseMap(&hdr, &blk) if !equalSparseEntries(got, v.wantMap) { t.Errorf("test %d, readOldGNUSparseMap(): got %v, want %v", i, got, v.wantMap) } if err != v.wantErr { t.Errorf("test %d, readOldGNUSparseMap() = %v, want %v", i, err, v.wantErr) } if hdr.Size != v.wantSize { t.Errorf("test %d, Header.Size = %d, want %d", i, hdr.Size, v.wantSize) } } } func TestReadGNUSparsePAXHeaders(t *testing.T) { padInput := func(s string) string { return s + string(zeroBlock[:blockPadding(int64(len(s)))]) } vectors := []struct { inputData string inputHdrs map[string]string wantMap sparseDatas wantSize int64 wantName string wantErr error }{{ inputHdrs: nil, wantErr: nil, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: strconv.FormatInt(math.MaxInt64, 10), paxGNUSparseMap: "0,1,2,3", }, wantErr: ErrHeader, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: "4\x00", paxGNUSparseMap: "0,1,2,3", }, wantErr: ErrHeader, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: "4", paxGNUSparseMap: "0,1,2,3", }, wantErr: ErrHeader, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "0,1,2,3", }, wantMap: sparseDatas{{0, 1}, {2, 3}}, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "0, 1,2,3", }, wantErr: ErrHeader, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "0,1,02,3", paxGNUSparseRealSize: "4321", }, wantMap: sparseDatas{{0, 1}, {2, 3}}, wantSize: 4321, }, { inputHdrs: map[string]string{ paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "0,one1,2,3", }, wantErr: ErrHeader, }, { inputHdrs: map[string]string{ paxGNUSparseMajor: "0", paxGNUSparseMinor: "0", paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "0,1,2,3", paxGNUSparseSize: "1234", paxGNUSparseRealSize: "4321", paxGNUSparseName: "realname", }, wantMap: sparseDatas{{0, 1}, {2, 3}}, wantSize: 1234, wantName: "realname", }, { inputHdrs: map[string]string{ paxGNUSparseMajor: "0", paxGNUSparseMinor: "0", paxGNUSparseNumBlocks: "1", paxGNUSparseMap: "10737418240,512", paxGNUSparseSize: "10737418240", paxGNUSparseName: "realname", }, wantMap: sparseDatas{{10737418240, 512}}, wantSize: 10737418240, wantName: "realname", }, { inputHdrs: map[string]string{ paxGNUSparseMajor: "0", paxGNUSparseMinor: "0", paxGNUSparseNumBlocks: "0", paxGNUSparseMap: "", }, wantMap: sparseDatas{}, }, { inputHdrs: map[string]string{ paxGNUSparseMajor: "0", paxGNUSparseMinor: "1", paxGNUSparseNumBlocks: "4", paxGNUSparseMap: "0,5,10,5,20,5,30,5", }, wantMap: sparseDatas{{0, 5}, {10, 5}, {20, 5}, {30, 5}}, }, { inputHdrs: map[string]string{ paxGNUSparseMajor: "1", paxGNUSparseMinor: "0", paxGNUSparseNumBlocks: "4", paxGNUSparseMap: "0,5,10,5,20,5,30,5", }, wantErr: io.ErrUnexpectedEOF, }, { inputData: padInput("0\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: sparseDatas{}, }, { inputData: padInput("0\n")[:blockSize-1] + "#", inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: sparseDatas{}, }, { inputData: padInput("0"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantErr: io.ErrUnexpectedEOF, }, { inputData: padInput("ab\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantErr: ErrHeader, }, { inputData: padInput("1\n2\n3\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: sparseDatas{{2, 3}}, }, { inputData: padInput("1\n2\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantErr: io.ErrUnexpectedEOF, }, { inputData: padInput("1\n2\n\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantErr: ErrHeader, }, { inputData: string(zeroBlock[:]) + padInput("0\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantErr: ErrHeader, }, { inputData: strings.Repeat("0", blockSize) + padInput("1\n5\n1\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: sparseDatas{{5, 1}}, }, { inputData: padInput(fmt.Sprintf("%d\n", int64(math.MaxInt64))), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantErr: ErrHeader, }, { inputData: padInput(strings.Repeat("0", 300) + "1\n" + strings.Repeat("0", 1000) + "5\n" + strings.Repeat("0", 800) + "2\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: sparseDatas{{5, 2}}, }, { inputData: padInput("2\n10737418240\n512\n21474836480\n512\n"), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: sparseDatas{{10737418240, 512}, {21474836480, 512}}, }, { inputData: padInput("100\n" + func() string { var ss []string for i := 0; i < 100; i++ { ss = append(ss, fmt.Sprintf("%d\n%d\n", int64(i)<<30, 512)) } return strings.Join(ss, "") }()), inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"}, wantMap: func() (spd sparseDatas) { for i := 0; i < 100; i++ { spd = append(spd, sparseEntry{int64(i) << 30, 512}) } return spd }(), }} for i, v := range vectors { var hdr Header hdr.PAXRecords = v.inputHdrs r := strings.NewReader(v.inputData + "#") // Add canary byte tr := Reader{curr: ®FileReader{r, int64(r.Len())}} got, err := tr.readGNUSparsePAXHeaders(&hdr) if !equalSparseEntries(got, v.wantMap) { t.Errorf("test %d, readGNUSparsePAXHeaders(): got %v, want %v", i, got, v.wantMap) } if err != v.wantErr { t.Errorf("test %d, readGNUSparsePAXHeaders() = %v, want %v", i, err, v.wantErr) } if hdr.Size != v.wantSize { t.Errorf("test %d, Header.Size = %d, want %d", i, hdr.Size, v.wantSize) } if hdr.Name != v.wantName { t.Errorf("test %d, Header.Name = %s, want %s", i, hdr.Name, v.wantName) } if v.wantErr == nil && r.Len() == 0 { t.Errorf("test %d, canary byte unexpectedly consumed", i) } } } // testNonEmptyReader wraps an io.Reader and ensures that // Read is never called with an empty buffer. type testNonEmptyReader struct{ io.Reader } func (r testNonEmptyReader) Read(b []byte) (int, error) { if len(b) == 0 { return 0, errors.New("unexpected empty Read call") } return r.Reader.Read(b) } func TestFileReader(t *testing.T) { type ( testRead struct { // Read(cnt) == (wantStr, wantErr) cnt int wantStr string wantErr error } testWriteTo struct { // WriteTo(testFile{ops}) == (wantCnt, wantErr) ops fileOps wantCnt int64 wantErr error } testRemaining struct { // logicalRemaining() == wantLCnt, physicalRemaining() == wantPCnt wantLCnt int64 wantPCnt int64 } testFnc any // testRead | testWriteTo | testRemaining ) type ( makeReg struct { str string size int64 } makeSparse struct { makeReg makeReg spd sparseDatas size int64 } fileMaker any // makeReg | makeSparse ) vectors := []struct { maker fileMaker tests []testFnc }{{ maker: makeReg{"", 0}, tests: []testFnc{ testRemaining{0, 0}, testRead{0, "", io.EOF}, testRead{1, "", io.EOF}, testWriteTo{nil, 0, nil}, testRemaining{0, 0}, }, }, { maker: makeReg{"", 1}, tests: []testFnc{ testRemaining{1, 1}, testRead{5, "", io.ErrUnexpectedEOF}, testWriteTo{nil, 0, io.ErrUnexpectedEOF}, testRemaining{1, 1}, }, }, { maker: makeReg{"hello", 5}, tests: []testFnc{ testRemaining{5, 5}, testRead{5, "hello", io.EOF}, testRemaining{0, 0}, }, }, { maker: makeReg{"hello, world", 50}, tests: []testFnc{ testRemaining{50, 50}, testRead{7, "hello, ", nil}, testRemaining{43, 43}, testRead{5, "world", nil}, testRemaining{38, 38}, testWriteTo{nil, 0, io.ErrUnexpectedEOF}, testRead{1, "", io.ErrUnexpectedEOF}, testRemaining{38, 38}, }, }, { maker: makeReg{"hello, world", 5}, tests: []testFnc{ testRemaining{5, 5}, testRead{0, "", nil}, testRead{4, "hell", nil}, testRemaining{1, 1}, testWriteTo{fileOps{"o"}, 1, nil}, testRemaining{0, 0}, testWriteTo{nil, 0, nil}, testRead{0, "", io.EOF}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 8}, tests: []testFnc{ testRemaining{8, 5}, testRead{3, "ab\x00", nil}, testRead{10, "\x00\x00cde", io.EOF}, testRemaining{0, 0}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 8}, tests: []testFnc{ testRemaining{8, 5}, testWriteTo{fileOps{"ab", int64(3), "cde"}, 8, nil}, testRemaining{0, 0}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 10}, tests: []testFnc{ testRemaining{10, 5}, testRead{100, "ab\x00\x00\x00cde\x00\x00", io.EOF}, testRemaining{0, 0}, }, }, { maker: makeSparse{makeReg{"abc", 5}, sparseDatas{{0, 2}, {5, 3}}, 10}, tests: []testFnc{ testRemaining{10, 5}, testRead{100, "ab\x00\x00\x00c", io.ErrUnexpectedEOF}, testRemaining{4, 2}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}}, 8}, tests: []testFnc{ testRemaining{8, 5}, testRead{8, "\x00abc\x00\x00de", io.EOF}, testRemaining{0, 0}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 0}, {6, 0}, {6, 2}}, 8}, tests: []testFnc{ testRemaining{8, 5}, testRead{8, "\x00abc\x00\x00de", io.EOF}, testRemaining{0, 0}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 0}, {6, 0}, {6, 2}}, 8}, tests: []testFnc{ testRemaining{8, 5}, testWriteTo{fileOps{int64(1), "abc", int64(2), "de"}, 8, nil}, testRemaining{0, 0}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}}, 10}, tests: []testFnc{ testRead{100, "\x00abc\x00\x00de\x00\x00", io.EOF}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}}, 10}, tests: []testFnc{ testWriteTo{fileOps{int64(1), "abc", int64(2), "de", int64(1), "\x00"}, 10, nil}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}, {8, 0}, {8, 0}, {8, 0}, {8, 0}}, 10}, tests: []testFnc{ testRead{100, "\x00abc\x00\x00de\x00\x00", io.EOF}, }, }, { maker: makeSparse{makeReg{"", 0}, sparseDatas{}, 2}, tests: []testFnc{ testRead{100, "\x00\x00", io.EOF}, }, }, { maker: makeSparse{makeReg{"", 8}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00", io.ErrUnexpectedEOF}, }, }, { maker: makeSparse{makeReg{"ab", 2}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00ab", errMissData}, }, }, { maker: makeSparse{makeReg{"ab", 8}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00ab", io.ErrUnexpectedEOF}, }, }, { maker: makeSparse{makeReg{"abc", 3}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00abc\x00\x00", errMissData}, }, }, { maker: makeSparse{makeReg{"abc", 8}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00abc\x00\x00", io.ErrUnexpectedEOF}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00abc\x00\x00de", errMissData}, }, }, { maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testWriteTo{fileOps{int64(1), "abc", int64(2), "de"}, 8, errMissData}, }, }, { maker: makeSparse{makeReg{"abcde", 8}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRead{100, "\x00abc\x00\x00de", io.ErrUnexpectedEOF}, }, }, { maker: makeSparse{makeReg{"abcdefghEXTRA", 13}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRemaining{15, 13}, testRead{100, "\x00abc\x00\x00defgh\x00\x00\x00\x00", errUnrefData}, testWriteTo{nil, 0, errUnrefData}, testRemaining{0, 5}, }, }, { maker: makeSparse{makeReg{"abcdefghEXTRA", 13}, sparseDatas{{1, 3}, {6, 5}}, 15}, tests: []testFnc{ testRemaining{15, 13}, testWriteTo{fileOps{int64(1), "abc", int64(2), "defgh", int64(4)}, 15, errUnrefData}, testRead{100, "", errUnrefData}, testRemaining{0, 5}, }, }} for i, v := range vectors { var fr fileReader switch maker := v.maker.(type) { case makeReg: r := testNonEmptyReader{strings.NewReader(maker.str)} fr = ®FileReader{r, maker.size} case makeSparse: if !validateSparseEntries(maker.spd, maker.size) { t.Fatalf("invalid sparse map: %v", maker.spd) } sph := invertSparseEntries(maker.spd, maker.size) r := testNonEmptyReader{strings.NewReader(maker.makeReg.str)} fr = ®FileReader{r, maker.makeReg.size} fr = &sparseFileReader{fr, sph, 0} default: t.Fatalf("test %d, unknown make operation: %T", i, maker) } for j, tf := range v.tests { switch tf := tf.(type) { case testRead: b := make([]byte, tf.cnt) n, err := fr.Read(b) if got := string(b[:n]); got != tf.wantStr || err != tf.wantErr { t.Errorf("test %d.%d, Read(%d):\ngot (%q, %v)\nwant (%q, %v)", i, j, tf.cnt, got, err, tf.wantStr, tf.wantErr) } case testWriteTo: f := &testFile{ops: tf.ops} got, err := fr.WriteTo(f) if _, ok := err.(testError); ok { t.Errorf("test %d.%d, WriteTo(): %v", i, j, err) } else if got != tf.wantCnt || err != tf.wantErr { t.Errorf("test %d.%d, WriteTo() = (%d, %v), want (%d, %v)", i, j, got, err, tf.wantCnt, tf.wantErr) } if len(f.ops) > 0 { t.Errorf("test %d.%d, expected %d more operations", i, j, len(f.ops)) } case testRemaining: if got := fr.logicalRemaining(); got != tf.wantLCnt { t.Errorf("test %d.%d, logicalRemaining() = %d, want %d", i, j, got, tf.wantLCnt) } if got := fr.physicalRemaining(); got != tf.wantPCnt { t.Errorf("test %d.%d, physicalRemaining() = %d, want %d", i, j, got, tf.wantPCnt) } default: t.Fatalf("test %d.%d, unknown test operation: %T", i, j, tf) } } } } func TestInsecurePaths(t *testing.T) { t.Setenv("GODEBUG", "tarinsecurepath=0") for _, path := range []string{ "../foo", "/foo", "a/b/../../../c", } { var buf bytes.Buffer tw := NewWriter(&buf) tw.WriteHeader(&Header{ Name: path, }) const securePath = "secure" tw.WriteHeader(&Header{ Name: securePath, }) tw.Close() tr := NewReader(&buf) h, err := tr.Next() if err != ErrInsecurePath { t.Errorf("tr.Next for file %q: got err %v, want ErrInsecurePath", path, err) continue } if h.Name != path { t.Errorf("tr.Next for file %q: got name %q, want %q", path, h.Name, path) } // Error should not be sticky. h, err = tr.Next() if err != nil { t.Errorf("tr.Next for file %q: got err %v, want nil", securePath, err) } if h.Name != securePath { t.Errorf("tr.Next for file %q: got name %q, want %q", securePath, h.Name, securePath) } } } func TestDisableInsecurePathCheck(t *testing.T) { t.Setenv("GODEBUG", "tarinsecurepath=1") var buf bytes.Buffer tw := NewWriter(&buf) const name = "/foo" tw.WriteHeader(&Header{ Name: name, }) tw.Close() tr := NewReader(&buf) h, err := tr.Next() if err != nil { t.Fatalf("tr.Next with tarinsecurepath=1: got err %v, want nil", err) } if h.Name != name { t.Fatalf("tr.Next with tarinsecurepath=1: got name %q, want %q", h.Name, name) } }