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-rw-r--r--src/encoding/base64/base64_test.go540
1 files changed, 540 insertions, 0 deletions
diff --git a/src/encoding/base64/base64_test.go b/src/encoding/base64/base64_test.go
new file mode 100644
index 0000000..0ad88eb
--- /dev/null
+++ b/src/encoding/base64/base64_test.go
@@ -0,0 +1,540 @@
+// 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 base64
+
+import (
+ "bytes"
+ "errors"
+ "fmt"
+ "io"
+ "reflect"
+ "runtime/debug"
+ "strings"
+ "testing"
+ "time"
+)
+
+type testpair struct {
+ decoded, encoded string
+}
+
+var pairs = []testpair{
+ // RFC 3548 examples
+ {"\x14\xfb\x9c\x03\xd9\x7e", "FPucA9l+"},
+ {"\x14\xfb\x9c\x03\xd9", "FPucA9k="},
+ {"\x14\xfb\x9c\x03", "FPucAw=="},
+
+ // RFC 4648 examples
+ {"", ""},
+ {"f", "Zg=="},
+ {"fo", "Zm8="},
+ {"foo", "Zm9v"},
+ {"foob", "Zm9vYg=="},
+ {"fooba", "Zm9vYmE="},
+ {"foobar", "Zm9vYmFy"},
+
+ // Wikipedia examples
+ {"sure.", "c3VyZS4="},
+ {"sure", "c3VyZQ=="},
+ {"sur", "c3Vy"},
+ {"su", "c3U="},
+ {"leasure.", "bGVhc3VyZS4="},
+ {"easure.", "ZWFzdXJlLg=="},
+ {"asure.", "YXN1cmUu"},
+ {"sure.", "c3VyZS4="},
+}
+
+// Do nothing to a reference base64 string (leave in standard format)
+func stdRef(ref string) string {
+ return ref
+}
+
+// Convert a reference string to URL-encoding
+func urlRef(ref string) string {
+ ref = strings.ReplaceAll(ref, "+", "-")
+ ref = strings.ReplaceAll(ref, "/", "_")
+ return ref
+}
+
+// Convert a reference string to raw, unpadded format
+func rawRef(ref string) string {
+ return strings.TrimRight(ref, "=")
+}
+
+// Both URL and unpadding conversions
+func rawURLRef(ref string) string {
+ return rawRef(urlRef(ref))
+}
+
+// A nonstandard encoding with a funny padding character, for testing
+var funnyEncoding = NewEncoding(encodeStd).WithPadding(rune('@'))
+
+func funnyRef(ref string) string {
+ return strings.ReplaceAll(ref, "=", "@")
+}
+
+type encodingTest struct {
+ enc *Encoding // Encoding to test
+ conv func(string) string // Reference string converter
+}
+
+var encodingTests = []encodingTest{
+ {StdEncoding, stdRef},
+ {URLEncoding, urlRef},
+ {RawStdEncoding, rawRef},
+ {RawURLEncoding, rawURLRef},
+ {funnyEncoding, funnyRef},
+ {StdEncoding.Strict(), stdRef},
+ {URLEncoding.Strict(), urlRef},
+ {RawStdEncoding.Strict(), rawRef},
+ {RawURLEncoding.Strict(), rawURLRef},
+ {funnyEncoding.Strict(), funnyRef},
+}
+
+var bigtest = testpair{
+ "Twas brillig, and the slithy toves",
+ "VHdhcyBicmlsbGlnLCBhbmQgdGhlIHNsaXRoeSB0b3Zlcw==",
+}
+
+func testEqual(t *testing.T, msg string, args ...any) 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 {
+ for _, tt := range encodingTests {
+ got := tt.enc.EncodeToString([]byte(p.decoded))
+ testEqual(t, "Encode(%q) = %q, want %q", p.decoded,
+ got, tt.conv(p.encoded))
+ }
+ }
+}
+
+func TestEncoder(t *testing.T) {
+ for _, p := range pairs {
+ bb := &strings.Builder{}
+ 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 := &strings.Builder{}
+ 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 {
+ for _, tt := range encodingTests {
+ encoded := tt.conv(p.encoded)
+ dbuf := make([]byte, tt.enc.DecodedLen(len(encoded)))
+ count, err := tt.enc.Decode(dbuf, []byte(encoded))
+ testEqual(t, "Decode(%q) = error %v, want %v", encoded, err, error(nil))
+ testEqual(t, "Decode(%q) = length %v, want %v", encoded, count, len(p.decoded))
+ testEqual(t, "Decode(%q) = %q, want %q", encoded, string(dbuf[0:count]), p.decoded)
+
+ dbuf, err = tt.enc.DecodeString(encoded)
+ testEqual(t, "DecodeString(%q) = error %v, want %v", encoded, err, error(nil))
+ testEqual(t, "DecodeString(%q) = %q, want %q", 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 {
+ _, err = decoder.Read(dbuf)
+ }
+ testEqual(t, "Read from %q = %v, want %v", p.encoded, 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},
+ {"\n", -1},
+ {"AAA=\n", -1},
+ {"AAAA\n", -1},
+ {"!!!!", 0},
+ {"====", 0},
+ {"x===", 1},
+ {"=AAA", 0},
+ {"A=AA", 1},
+ {"AA=A", 2},
+ {"AA==A", 4},
+ {"AAA=AAAA", 4},
+ {"AAAAA", 4},
+ {"AAAAAA", 4},
+ {"A=", 1},
+ {"A==", 1},
+ {"AA=", 3},
+ {"AA==", -1},
+ {"AAA=", -1},
+ {"AAAA", -1},
+ {"AAAAAA=", 7},
+ {"YWJjZA=====", 8},
+ {"A!\n", 1},
+ {"A=\n", 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 TestDecodeBounds(t *testing.T) {
+ var buf [32]byte
+ s := StdEncoding.EncodeToString(buf[:])
+ defer func() {
+ if err := recover(); err != nil {
+ t.Fatalf("Decode panicked unexpectedly: %v\n%s", err, debug.Stack())
+ }
+ }()
+ n, err := StdEncoding.Decode(buf[:], []byte(s))
+ if n != len(buf) || err != nil {
+ t.Fatalf("StdEncoding.Decode = %d, %v, want %d, nil", n, err, len(buf))
+ }
+}
+
+func TestEncodedLen(t *testing.T) {
+ for _, tt := range []struct {
+ enc *Encoding
+ n int
+ want int
+ }{
+ {RawStdEncoding, 0, 0},
+ {RawStdEncoding, 1, 2},
+ {RawStdEncoding, 2, 3},
+ {RawStdEncoding, 3, 4},
+ {RawStdEncoding, 7, 10},
+ {StdEncoding, 0, 0},
+ {StdEncoding, 1, 4},
+ {StdEncoding, 2, 4},
+ {StdEncoding, 3, 4},
+ {StdEncoding, 4, 8},
+ {StdEncoding, 7, 12},
+ } {
+ if got := tt.enc.EncodedLen(tt.n); got != tt.want {
+ t.Errorf("EncodedLen(%d): got %d, want %d", tt.n, got, tt.want)
+ }
+ }
+}
+
+func TestDecodedLen(t *testing.T) {
+ for _, tt := range []struct {
+ enc *Encoding
+ n int
+ want int
+ }{
+ {RawStdEncoding, 0, 0},
+ {RawStdEncoding, 2, 1},
+ {RawStdEncoding, 3, 2},
+ {RawStdEncoding, 4, 3},
+ {RawStdEncoding, 10, 7},
+ {StdEncoding, 0, 0},
+ {StdEncoding, 4, 3},
+ {StdEncoding, 8, 6},
+ } {
+ if got := tt.enc.DecodedLen(tt.n); got != tt.want {
+ t.Errorf("DecodedLen(%d): got %d, want %d", tt.n, got, tt.want)
+ }
+ }
+}
+
+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 := io.ReadAll(NewDecoder(StdEncoding, encoded))
+ if err != nil {
+ t.Fatalf("io.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 TestNewLineCharacters(t *testing.T) {
+ // Each of these should decode to the string "sure", without errors.
+ const expected = "sure"
+ examples := []string{
+ "c3VyZQ==",
+ "c3VyZQ==\r",
+ "c3VyZQ==\n",
+ "c3VyZQ==\r\n",
+ "c3VyZ\r\nQ==",
+ "c3V\ryZ\nQ==",
+ "c3V\nyZ\rQ==",
+ "c3VyZ\nQ==",
+ "c3VyZQ\n==",
+ "c3VyZQ=\n=",
+ "c3VyZQ=\r\n\r\n=",
+ }
+ 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)
+ }
+ }
+}
+
+type nextRead struct {
+ n int // bytes to return
+ err error // error to return
+}
+
+// faultInjectReader returns data from source, rate-limited
+// and with the errors as written to nextc.
+type faultInjectReader struct {
+ source string
+ nextc <-chan nextRead
+}
+
+func (r *faultInjectReader) Read(p []byte) (int, error) {
+ nr := <-r.nextc
+ if len(p) > nr.n {
+ p = p[:nr.n]
+ }
+ n := copy(p, r.source)
+ r.source = r.source[n:]
+ return n, nr.err
+}
+
+// tests that we don't ignore errors from our underlying reader
+func TestDecoderIssue3577(t *testing.T) {
+ next := make(chan nextRead, 10)
+ wantErr := errors.New("my error")
+ next <- nextRead{5, nil}
+ next <- nextRead{10, wantErr}
+ next <- nextRead{0, wantErr}
+ d := NewDecoder(StdEncoding, &faultInjectReader{
+ source: "VHdhcyBicmlsbGlnLCBhbmQgdGhlIHNsaXRoeSB0b3Zlcw==", // twas brillig...
+ nextc: next,
+ })
+ errc := make(chan error, 1)
+ go func() {
+ _, err := io.ReadAll(d)
+ errc <- err
+ }()
+ select {
+ case err := <-errc:
+ if err != wantErr {
+ t.Errorf("got error %v; want %v", err, wantErr)
+ }
+ case <-time.After(5 * time.Second):
+ t.Errorf("timeout; Decoder blocked without returning an error")
+ }
+}
+
+func TestDecoderIssue4779(t *testing.T) {
+ encoded := `CP/EAT8AAAEF
+AQEBAQEBAAAAAAAAAAMAAQIEBQYHCAkKCwEAAQUBAQEBAQEAAAAAAAAAAQACAwQFBgcICQoLEAAB
+BAEDAgQCBQcGCAUDDDMBAAIRAwQhEjEFQVFhEyJxgTIGFJGhsUIjJBVSwWIzNHKC0UMHJZJT8OHx
+Y3M1FqKygyZEk1RkRcKjdDYX0lXiZfKzhMPTdePzRieUpIW0lcTU5PSltcXV5fVWZnaGlqa2xtbm
+9jdHV2d3h5ent8fX5/cRAAICAQIEBAMEBQYHBwYFNQEAAhEDITESBEFRYXEiEwUygZEUobFCI8FS
+0fAzJGLhcoKSQ1MVY3M08SUGFqKygwcmNcLSRJNUoxdkRVU2dGXi8rOEw9N14/NGlKSFtJXE1OT0
+pbXF1eX1VmZ2hpamtsbW5vYnN0dXZ3eHl6e3x//aAAwDAQACEQMRAD8A9VSSSSUpJJJJSkkkJ+Tj
+1kiy1jCJJDnAcCTykpKkuQ6p/jN6FgmxlNduXawwAzaGH+V6jn/R/wCt71zdn+N/qL3kVYFNYB4N
+ji6PDVjWpKp9TSXnvTf8bFNjg3qOEa2n6VlLpj/rT/pf567DpX1i6L1hs9Py67X8mqdtg/rUWbbf
++gkp0kkkklKSSSSUpJJJJT//0PVUkkklKVLq3WMDpGI7KzrNjADtYNXvI/Mqr/Pd/q9W3vaxjnvM
+NaCXE9gNSvGPrf8AWS3qmba5jjsJhoB0DAf0NDf6sevf+/lf8Hj0JJATfWT6/dV6oXU1uOLQeKKn
+EQP+Hubtfe/+R7Mf/g7f5xcocp++Z11JMCJPgFBxOg7/AOuqDx8I/ikpkXkmSdU8mJIJA/O8EMAy
+j+mSARB/17pKVXYWHXjsj7yIex0PadzXMO1zT5KHoNA3HT8ietoGhgjsfA+CSnvvqh/jJtqsrwOv
+2b6NGNzXfTYexzJ+nU7/ALkf4P8Awv6P9KvTQQ4AgyDqCF85Pho3CTB7eHwXoH+LT65uZbX9X+o2
+bqbPb06551Y4
+`
+ encodedShort := strings.ReplaceAll(encoded, "\n", "")
+
+ dec := NewDecoder(StdEncoding, strings.NewReader(encoded))
+ res1, err := io.ReadAll(dec)
+ if err != nil {
+ t.Errorf("ReadAll failed: %v", err)
+ }
+
+ dec = NewDecoder(StdEncoding, strings.NewReader(encodedShort))
+ var res2 []byte
+ res2, err = io.ReadAll(dec)
+ if err != nil {
+ t.Errorf("ReadAll failed: %v", err)
+ }
+
+ if !bytes.Equal(res1, res2) {
+ t.Error("Decoded results not equal")
+ }
+}
+
+func TestDecoderIssue7733(t *testing.T) {
+ s, err := StdEncoding.DecodeString("YWJjZA=====")
+ want := CorruptInputError(8)
+ if !reflect.DeepEqual(want, err) {
+ t.Errorf("Error = %v; want CorruptInputError(8)", err)
+ }
+ if string(s) != "abcd" {
+ t.Errorf("DecodeString = %q; want abcd", s)
+ }
+}
+
+func TestDecoderIssue15656(t *testing.T) {
+ _, err := StdEncoding.Strict().DecodeString("WvLTlMrX9NpYDQlEIFlnDB==")
+ want := CorruptInputError(22)
+ if !reflect.DeepEqual(want, err) {
+ t.Errorf("Error = %v; want CorruptInputError(22)", err)
+ }
+ _, err = StdEncoding.Strict().DecodeString("WvLTlMrX9NpYDQlEIFlnDA==")
+ if err != nil {
+ t.Errorf("Error = %v; want nil", err)
+ }
+ _, err = StdEncoding.DecodeString("WvLTlMrX9NpYDQlEIFlnDB==")
+ if err != nil {
+ t.Errorf("Error = %v; want nil", err)
+ }
+}
+
+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) {
+ sizes := []int{2, 4, 8, 64, 8192}
+ benchFunc := func(b *testing.B, benchSize int) {
+ data := StdEncoding.EncodeToString(make([]byte, benchSize))
+ b.SetBytes(int64(len(data)))
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ StdEncoding.DecodeString(data)
+ }
+ }
+ for _, size := range sizes {
+ b.Run(fmt.Sprintf("%d", size), func(b *testing.B) {
+ benchFunc(b, size)
+ })
+ }
+}
+
+func BenchmarkNewEncoding(b *testing.B) {
+ b.SetBytes(int64(len(Encoding{}.decodeMap)))
+ for i := 0; i < b.N; i++ {
+ e := NewEncoding(encodeStd)
+ for _, v := range e.decodeMap {
+ _ = v
+ }
+ }
+}
+
+func TestDecoderRaw(t *testing.T) {
+ source := "AAAAAA"
+ want := []byte{0, 0, 0, 0}
+
+ // Direct.
+ dec1, err := RawURLEncoding.DecodeString(source)
+ if err != nil || !bytes.Equal(dec1, want) {
+ t.Errorf("RawURLEncoding.DecodeString(%q) = %x, %v, want %x, nil", source, dec1, err, want)
+ }
+
+ // Through reader. Used to fail.
+ r := NewDecoder(RawURLEncoding, bytes.NewReader([]byte(source)))
+ dec2, err := io.ReadAll(io.LimitReader(r, 100))
+ if err != nil || !bytes.Equal(dec2, want) {
+ t.Errorf("reading NewDecoder(RawURLEncoding, %q) = %x, %v, want %x, nil", source, dec2, err, want)
+ }
+
+ // Should work with padding.
+ r = NewDecoder(URLEncoding, bytes.NewReader([]byte(source+"==")))
+ dec3, err := io.ReadAll(r)
+ if err != nil || !bytes.Equal(dec3, want) {
+ t.Errorf("reading NewDecoder(URLEncoding, %q) = %x, %v, want %x, nil", source+"==", dec3, err, want)
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-19 23:22:29 +0000