-// 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 base32
-
-import (
- "bytes"
- "errors"
- "io"
- "io/ioutil"
- "strings"
- "testing"
-)
-
-type testpair struct {
- decoded, encoded string
-}
-
-var pairs = []testpair{
- // RFC 4648 examples
- {"", ""},
- {"f", "MY======"},
- {"fo", "MZXQ===="},
- {"foo", "MZXW6==="},
- {"foob", "MZXW6YQ="},
- {"fooba", "MZXW6YTB"},
- {"foobar", "MZXW6YTBOI======"},
-
- // Wikipedia examples, converted to base32
- {"sure.", "ON2XEZJO"},
- {"sure", "ON2XEZI="},
- {"sur", "ON2XE==="},
- {"su", "ON2Q===="},
- {"leasure.", "NRSWC43VOJSS4==="},
- {"easure.", "MVQXG5LSMUXA===="},
- {"asure.", "MFZXK4TFFY======"},
- {"sure.", "ON2XEZJO"},
-}
-
-var bigtest = testpair{
- "Twas brillig, and the slithy toves",
- "KR3WC4ZAMJZGS3DMNFTSYIDBNZSCA5DIMUQHG3DJORUHSIDUN53GK4Y=",
-}
-
-func testEqual(t *testing.T, msg string, args ...interface{}) bool {
- //t.Helper()
- if args[len(args)-2] != args[len(args)-1] {
- t.Errorf(msg, args...)
- return false
- }
- return true
-}
-
-func TestEncode(t *testing.T) {
- for _, p := range pairs {
- got := StdEncoding.EncodeToString([]byte(p.decoded))
- testEqual(t, "Encode(%q) = %q, want %q", p.decoded, got, p.encoded)
- }
-}
-
-func TestEncoder(t *testing.T) {
- for _, p := range pairs {
- bb := &bytes.Buffer{}
- encoder := NewEncoder(StdEncoding, bb)
- encoder.Write([]byte(p.decoded))
- encoder.Close()
- testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded)
- }
-}
-
-func TestEncoderBuffering(t *testing.T) {
- input := []byte(bigtest.decoded)
- for bs := 1; bs <= 12; bs++ {
- bb := &bytes.Buffer{}
- encoder := NewEncoder(StdEncoding, bb)
- for pos := 0; pos < len(input); pos += bs {
- end := pos + bs
- if end > len(input) {
- end = len(input)
- }
- n, err := encoder.Write(input[pos:end])
- testEqual(t, "Write(%q) gave error %v, want %v", input[pos:end], err, error(nil))
- testEqual(t, "Write(%q) gave length %v, want %v", input[pos:end], n, end-pos)
- }
- err := encoder.Close()
- testEqual(t, "Close gave error %v, want %v", err, error(nil))
- testEqual(t, "Encoding/%d of %q = %q, want %q", bs, bigtest.decoded, bb.String(), bigtest.encoded)
- }
-}
-
-func TestDecode(t *testing.T) {
- for _, p := range pairs {
- dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)))
- count, end, err := StdEncoding.decode(dbuf, []byte(p.encoded))
- testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, error(nil))
- testEqual(t, "Decode(%q) = length %v, want %v", p.encoded, count, len(p.decoded))
- if len(p.encoded) > 0 {
- testEqual(t, "Decode(%q) = end %v, want %v", p.encoded, end, (p.encoded[len(p.encoded)-1] == '='))
- }
- testEqual(t, "Decode(%q) = %q, want %q", p.encoded,
- string(dbuf[0:count]),
- p.decoded)
-
- dbuf, err = StdEncoding.DecodeString(p.encoded)
- testEqual(t, "DecodeString(%q) = error %v, want %v", p.encoded, err, error(nil))
- testEqual(t, "DecodeString(%q) = %q, want %q", p.encoded, string(dbuf), p.decoded)
- }
-}
-
-func TestDecoder(t *testing.T) {
- for _, p := range pairs {
- decoder := NewDecoder(StdEncoding, strings.NewReader(p.encoded))
- dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)))
- count, err := decoder.Read(dbuf)
- if err != nil && err != io.EOF {
- t.Fatal("Read failed", err)
- }
- testEqual(t, "Read from %q = length %v, want %v", p.encoded, count, len(p.decoded))
- testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded)
- if err != io.EOF {
- count, err = decoder.Read(dbuf)
- }
- testEqual(t, "Read from %q = %v, want %v", p.encoded, err, io.EOF)
- }
-}
-
-type badReader struct {
- data []byte
- errs []error
- called int
- limit int
-}
-
-// Populates p with data, returns a count of the bytes written and an
-// error. The error returned is taken from badReader.errs, with each
-// invocation of Read returning the next error in this slice, or io.EOF,
-// if all errors from the slice have already been returned. The
-// number of bytes returned is determined by the size of the input buffer
-// the test passes to decoder.Read and will be a multiple of 8, unless
-// badReader.limit is non zero.
-func (b *badReader) Read(p []byte) (int, error) {
- lim := len(p)
- if b.limit != 0 && b.limit < lim {
- lim = b.limit
- }
- if len(b.data) < lim {
- lim = len(b.data)
- }
- for i := range p[:lim] {
- p[i] = b.data[i]
- }
- b.data = b.data[lim:]
- err := io.EOF
- if b.called < len(b.errs) {
- err = b.errs[b.called]
- }
- b.called++
- return lim, err
-}
-
-// TestIssue20044 tests that decoder.Read behaves correctly when the caller
-// supplied reader returns an error.
-func TestIssue20044(t *testing.T) {
- badErr := errors.New("bad reader error")
- testCases := []struct {
- r badReader
- res string
- err error
- dbuflen int
- }{
- // Check valid input data accompanied by an error is processed and the error is propagated.
- {r: badReader{data: []byte("MY======"), errs: []error{badErr}},
- res: "f", err: badErr},
- // Check a read error accompanied by input data consisting of newlines only is propagated.
- {r: badReader{data: []byte("\n\n\n\n\n\n\n\n"), errs: []error{badErr, nil}},
- res: "", err: badErr},
- // Reader will be called twice. The first time it will return 8 newline characters. The
- // second time valid base32 encoded data and an error. The data should be decoded
- // correctly and the error should be propagated.
- {r: badReader{data: []byte("\n\n\n\n\n\n\n\nMY======"), errs: []error{nil, badErr}},
- res: "f", err: badErr, dbuflen: 8},
- // Reader returns invalid input data (too short) and an error. Verify the reader
- // error is returned.
- {r: badReader{data: []byte("MY====="), errs: []error{badErr}},
- res: "", err: badErr},
- // Reader returns invalid input data (too short) but no error. Verify io.ErrUnexpectedEOF
- // is returned.
- {r: badReader{data: []byte("MY====="), errs: []error{nil}},
- res: "", err: io.ErrUnexpectedEOF},
- // Reader returns invalid input data and an error. Verify the reader and not the
- // decoder error is returned.
- {r: badReader{data: []byte("Ma======"), errs: []error{badErr}},
- res: "", err: badErr},
- // Reader returns valid data and io.EOF. Check data is decoded and io.EOF is propagated.
- {r: badReader{data: []byte("MZXW6YTB"), errs: []error{io.EOF}},
- res: "fooba", err: io.EOF},
- // Check errors are properly reported when decoder.Read is called multiple times.
- // decoder.Read will be called 8 times, badReader.Read will be called twice, returning
- // valid data both times but an error on the second call.
- {r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{nil, badErr}},
- res: "leasure.", err: badErr, dbuflen: 1},
- // Check io.EOF is properly reported when decoder.Read is called multiple times.
- // decoder.Read will be called 8 times, badReader.Read will be called twice, returning
- // valid data both times but io.EOF on the second call.
- {r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{nil, io.EOF}},
- res: "leasure.", err: io.EOF, dbuflen: 1},
- // The following two test cases check that errors are propagated correctly when more than
- // 8 bytes are read at a time.
- {r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{io.EOF}},
- res: "leasure.", err: io.EOF, dbuflen: 11},
- {r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{badErr}},
- res: "leasure.", err: badErr, dbuflen: 11},
- // Check that errors are correctly propagated when the reader returns valid bytes in
- // groups that are not divisible by 8. The first read will return 11 bytes and no
- // error. The second will return 7 and an error. The data should be decoded correctly
- // and the error should be propagated.
- {r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{nil, badErr}, limit: 11},
- res: "leasure.", err: badErr},
- }
-
- for _, tc := range testCases {
- input := tc.r.data
- decoder := NewDecoder(StdEncoding, &tc.r)
- var dbuflen int
- if tc.dbuflen > 0 {
- dbuflen = tc.dbuflen
- } else {
- dbuflen = StdEncoding.DecodedLen(len(input))
- }
- dbuf := make([]byte, dbuflen)
- var err error
- var res []byte
- for err == nil {
- var n int
- n, err = decoder.Read(dbuf)
- if n > 0 {
- res = append(res, dbuf[:n]...)
- }
- }
-
- testEqual(t, "Decoding of %q = %q, want %q", string(input), string(res), tc.res)
- testEqual(t, "Decoding of %q err = %v, expected %v", string(input), err, tc.err)
- }
-}
-
-// TestDecoderError verifies decode errors are propagated when there are no read
-// errors.
-func TestDecoderError(t *testing.T) {
- for _, readErr := range []error{io.EOF, nil} {
- input := "MZXW6YTb"
- dbuf := make([]byte, StdEncoding.DecodedLen(len(input)))
- br := badReader{data: []byte(input), errs: []error{readErr}}
- decoder := NewDecoder(StdEncoding, &br)
- n, err := decoder.Read(dbuf)
- testEqual(t, "Read after EOF, n = %d, expected %d", n, 0)
- if _, ok := err.(CorruptInputError); !ok {
- t.Errorf("Corrupt input error expected. Found %T", err)
- }
- }
-}
-
-// TestReaderEOF ensures decoder.Read behaves correctly when input data is
-// exhausted.
-func TestReaderEOF(t *testing.T) {
- for _, readErr := range []error{io.EOF, nil} {
- input := "MZXW6YTB"
- br := badReader{data: []byte(input), errs: []error{nil, readErr}}
- decoder := NewDecoder(StdEncoding, &br)
- dbuf := make([]byte, StdEncoding.DecodedLen(len(input)))
- n, err := decoder.Read(dbuf)
- testEqual(t, "Decoding of %q err = %v, expected %v", string(input), err, error(nil))
- n, err = decoder.Read(dbuf)
- testEqual(t, "Read after EOF, n = %d, expected %d", n, 0)
- testEqual(t, "Read after EOF, err = %v, expected %v", err, io.EOF)
- n, err = decoder.Read(dbuf)
- testEqual(t, "Read after EOF, n = %d, expected %d", n, 0)
- testEqual(t, "Read after EOF, err = %v, expected %v", err, io.EOF)
- }
-}
-
-func TestDecoderBuffering(t *testing.T) {
- for bs := 1; bs <= 12; bs++ {
- decoder := NewDecoder(StdEncoding, strings.NewReader(bigtest.encoded))
- buf := make([]byte, len(bigtest.decoded)+12)
- var total int
- var n int
- var err error
- for total = 0; total < len(bigtest.decoded) && err == nil; {
- n, err = decoder.Read(buf[total : total+bs])
- total += n
- }
- if err != nil && err != io.EOF {
- t.Errorf("Read from %q at pos %d = %d, unexpected error %v", bigtest.encoded, total, n, err)
- }
- testEqual(t, "Decoding/%d of %q = %q, want %q", bs, bigtest.encoded, string(buf[0:total]), bigtest.decoded)
- }
-}
-
-func TestDecodeCorrupt(t *testing.T) {
- testCases := []struct {
- input string
- offset int // -1 means no corruption.
- }{
- {"", -1},
- {"!!!!", 0},
- {"x===", 0},
- {"AA=A====", 2},
- {"AAA=AAAA", 3},
- {"MMMMMMMMM", 8},
- {"MMMMMM", 0},
- {"A=", 1},
- {"AA=", 3},
- {"AA==", 4},
- {"AA===", 5},
- {"AAAA=", 5},
- {"AAAA==", 6},
- {"AAAAA=", 6},
- {"AAAAA==", 7},
- {"A=======", 1},
- {"AA======", -1},
- {"AAA=====", 3},
- {"AAAA====", -1},
- {"AAAAA===", -1},
- {"AAAAAA==", 6},
- {"AAAAAAA=", -1},
- {"AAAAAAAA", -1},
- }
- for _, tc := range testCases {
- dbuf := make([]byte, StdEncoding.DecodedLen(len(tc.input)))
- _, err := StdEncoding.Decode(dbuf, []byte(tc.input))
- if tc.offset == -1 {
- if err != nil {
- t.Error("Decoder wrongly detected corruption in", tc.input)
- }
- continue
- }
- switch err := err.(type) {
- case CorruptInputError:
- testEqual(t, "Corruption in %q at offset %v, want %v", tc.input, int(err), tc.offset)
- default:
- t.Error("Decoder failed to detect corruption in", tc)
- }
- }
-}
-
-func TestBig(t *testing.T) {
- n := 3*1000 + 1
- raw := make([]byte, n)
- const alpha = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
- for i := 0; i < n; i++ {
- raw[i] = alpha[i%len(alpha)]
- }
- encoded := new(bytes.Buffer)
- w := NewEncoder(StdEncoding, encoded)
- nn, err := w.Write(raw)
- if nn != n || err != nil {
- t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n)
- }
- err = w.Close()
- if err != nil {
- t.Fatalf("Encoder.Close() = %v want nil", err)
- }
- decoded, err := ioutil.ReadAll(NewDecoder(StdEncoding, encoded))
- if err != nil {
- t.Fatalf("ioutil.ReadAll(NewDecoder(...)): %v", err)
- }
-
- if !bytes.Equal(raw, decoded) {
- var i int
- for i = 0; i < len(decoded) && i < len(raw); i++ {
- if decoded[i] != raw[i] {
- break
- }
- }
- t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i)
- }
-}
-
-func testStringEncoding(t *testing.T, expected string, examples []string) {
- for _, e := range examples {
- buf, err := StdEncoding.DecodeString(e)
- if err != nil {
- t.Errorf("Decode(%q) failed: %v", e, err)
- continue
- }
- if s := string(buf); s != expected {
- t.Errorf("Decode(%q) = %q, want %q", e, s, expected)
- }
- }
-}
-
-func TestNewLineCharacters(t *testing.T) {
- // Each of these should decode to the string "sure", without errors.
- examples := []string{
- "ON2XEZI=",
- "ON2XEZI=\r",
- "ON2XEZI=\n",
- "ON2XEZI=\r\n",
- "ON2XEZ\r\nI=",
- "ON2X\rEZ\nI=",
- "ON2X\nEZ\rI=",
- "ON2XEZ\nI=",
- "ON2XEZI\n=",
- }
- testStringEncoding(t, "sure", examples)
-
- // Each of these should decode to the string "foobar", without errors.
- examples = []string{
- "MZXW6YTBOI======",
- "MZXW6YTBOI=\r\n=====",
- }
- testStringEncoding(t, "foobar", examples)
-}
-
-func TestDecoderIssue4779(t *testing.T) {
- encoded := `JRXXEZLNEBUXA43VNUQGI33MN5ZCA43JOQQGC3LFOQWCAY3PNZZWKY3UMV2HK4
-RAMFSGS4DJONUWG2LOM4QGK3DJOQWCA43FMQQGI3YKMVUXK43NN5SCA5DFNVYG64RANFXGG2LENFSH
-K3TUEB2XIIDMMFRG64TFEBSXIIDEN5WG64TFEBWWCZ3OMEQGC3DJOF2WCLRAKV2CAZLONFWQUYLEEB
-WWS3TJNUQHMZLONFQW2LBAOF2WS4ZANZXXG5DSOVSCAZLYMVZGG2LUMF2GS33OEB2WY3DBNVRW6IDM
-MFRG64TJOMQG42LTNEQHK5AKMFWGS4LVNFYCAZLYEBSWCIDDN5WW233EN4QGG33OONSXC5LBOQXCAR
-DVNFZSAYLVORSSA2LSOVZGKIDEN5WG64RANFXAU4TFOBZGK2DFNZSGK4TJOQQGS3RAOZXWY5LQORQX
-IZJAOZSWY2LUEBSXG43FEBRWS3DMOVWSAZDPNRXXEZJAMV2SAZTVM5UWC5BANZ2WY3DBBJYGC4TJMF
-2HK4ROEBCXQY3FOB2GK5LSEBZWS3TUEBXWGY3BMVRWC5BAMN2XA2LEMF2GC5BANZXW4IDQOJXWSZDF
-NZ2CYIDTOVXHIIDJNYFGG5LMOBQSA4LVNEQG6ZTGNFRWSYJAMRSXGZLSOVXHIIDNN5WGY2LUEBQW42
-LNEBUWIIDFON2CA3DBMJXXE5LNFY==
-====`
- encodedShort := strings.Replace(encoded, "\n", "", -1)
-
- dec := NewDecoder(StdEncoding, strings.NewReader(encoded))
- res1, err := ioutil.ReadAll(dec)
- if err != nil {
- t.Errorf("ReadAll failed: %v", err)
- }
-
- dec = NewDecoder(StdEncoding, strings.NewReader(encodedShort))
- var res2 []byte
- res2, err = ioutil.ReadAll(dec)
- if err != nil {
- t.Errorf("ReadAll failed: %v", err)
- }
-
- if !bytes.Equal(res1, res2) {
- t.Error("Decoded results not equal")
- }
-}
-
-func BenchmarkEncodeToString(b *testing.B) {
- data := make([]byte, 8192)
- b.SetBytes(int64(len(data)))
- for i := 0; i < b.N; i++ {
- StdEncoding.EncodeToString(data)
- }
-}
-
-func BenchmarkDecodeString(b *testing.B) {
- data := StdEncoding.EncodeToString(make([]byte, 8192))
- b.SetBytes(int64(len(data)))
- for i := 0; i < b.N; i++ {
- StdEncoding.DecodeString(data)
- }
-}
-
-func TestWithCustomPadding(t *testing.T) {
- for _, testcase := range pairs {
- defaultPadding := StdEncoding.EncodeToString([]byte(testcase.decoded))
- customPadding := StdEncoding.WithPadding('@').EncodeToString([]byte(testcase.decoded))
- expected := strings.Replace(defaultPadding, "=", "@", -1)
-
- if expected != customPadding {
- t.Errorf("Expected custom %s, got %s", expected, customPadding)
- }
- if testcase.encoded != defaultPadding {
- t.Errorf("Expected %s, got %s", testcase.encoded, defaultPadding)
- }
- }
-}
-
-func TestWithoutPadding(t *testing.T) {
- for _, testcase := range pairs {
- defaultPadding := StdEncoding.EncodeToString([]byte(testcase.decoded))
- customPadding := StdEncoding.WithPadding(NoPadding).EncodeToString([]byte(testcase.decoded))
- expected := strings.TrimRight(defaultPadding, "=")
-
- if expected != customPadding {
- t.Errorf("Expected custom %s, got %s", expected, customPadding)
- }
- if testcase.encoded != defaultPadding {
- t.Errorf("Expected %s, got %s", testcase.encoded, defaultPadding)
- }
- }
-}
-
-func TestDecodeWithPadding(t *testing.T) {
- encodings := []*Encoding{
- StdEncoding,
- StdEncoding.WithPadding('-'),
- StdEncoding.WithPadding(NoPadding),
- }
-
- for i, enc := range encodings {
- for _, pair := range pairs {
-
- input := pair.decoded
- encoded := enc.EncodeToString([]byte(input))
-
- decoded, err := enc.DecodeString(encoded)
- if err != nil {
- t.Errorf("DecodeString Error for encoding %d (%q): %v", i, input, err)
- }
-
- if input != string(decoded) {
- t.Errorf("Unexpected result for encoding %d: got %q; want %q", i, decoded, input)
- }
- }
- }
-}
-
-func TestDecodeWithWrongPadding(t *testing.T) {
- encoded := StdEncoding.EncodeToString([]byte("foobar"))
-
- _, err := StdEncoding.WithPadding('-').DecodeString(encoded)
- if err == nil {
- t.Error("expected error")
- }
-
- _, err = StdEncoding.WithPadding(NoPadding).DecodeString(encoded)
- if err == nil {
- t.Error("expected error")
- }
-}
-
-func TestEncodedDecodedLen(t *testing.T) {
- type test struct {
- in int
- wantEnc int
- wantDec int
- }
- data := bytes.Repeat([]byte("x"), 100)
- for _, test := range []struct {
- name string
- enc *Encoding
- cases []test
- }{
- {"StdEncoding", StdEncoding, []test{
- {0, 0, 0},
- {1, 8, 5},
- {5, 8, 5},
- {6, 16, 10},
- {10, 16, 10},
- }},
- {"NoPadding", StdEncoding.WithPadding(NoPadding), []test{
- {0, 0, 0},
- {1, 2, 1},
- {2, 4, 2},
- {5, 8, 5},
- {6, 10, 6},
- {7, 12, 7},
- {10, 16, 10},
- {11, 18, 11},
- }},
- } {
- t.Run(test.name, func(t *testing.T) {
- for _, tc := range test.cases {
- encLen := test.enc.EncodedLen(tc.in)
- decLen := test.enc.DecodedLen(encLen)
- enc := test.enc.EncodeToString(data[:tc.in])
- if len(enc) != encLen {
- t.Fatalf("EncodedLen(%d) = %d but encoded to %q (%d)", tc.in, encLen, enc, len(enc))
- }
- if encLen != tc.wantEnc {
- t.Fatalf("EncodedLen(%d) = %d; want %d", tc.in, encLen, tc.wantEnc)
- }
- if decLen != tc.wantDec {
- t.Fatalf("DecodedLen(%d) = %d; want %d", encLen, decLen, tc.wantDec)
- }
- }
- })
- }
-}
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