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Merge pull request #27 from gopistolet/ddos
Use ReadUntill to protect against ddos.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| package smtp | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "bytes" | ||
| "io/ioutil" | ||
| "testing" | ||
| ) | ||
|
|
||
| func compare(t *testing.T, data []byte, expected []byte) { | ||
| br := bufio.NewReader(bytes.NewReader(data)) | ||
|
|
||
| dataReader := NewDataReader(br) | ||
| output, err := ioutil.ReadAll(dataReader) | ||
| if bytes.Compare(output, expected) != 0 { | ||
| t.Errorf("Expected %v\ngot %v\n", expected, output) | ||
| } | ||
| if err != nil { | ||
| t.Errorf("Did not expect error: %v", err) | ||
| } | ||
|
|
||
| } | ||
|
|
||
| func expectError(t *testing.T, data []byte, expected error) { | ||
| br := bufio.NewReader(bytes.NewReader(data)) | ||
| dataReader := NewDataReader(br) | ||
| _, err := ioutil.ReadAll(dataReader) | ||
| if err != expected { | ||
| t.Errorf("Expected error: %v, got: %v", expected, err) | ||
| } | ||
|
|
||
| } | ||
|
|
||
| func TestDataReaderValid(t *testing.T) { | ||
| data := []byte("Some test mail\nblablabla\n.\n") | ||
| expected := []byte("Some test mail\nblablabla\n") | ||
| compare(t, data, expected) | ||
|
|
||
| data = []byte("Some test mail\nblablabla\n.\nshould not read this") | ||
| expected = []byte("Some test mail\nblablabla\n") | ||
| compare(t, data, expected) | ||
|
|
||
| data = []byte("Some test mail\n..blablabla\n.\n") | ||
| expected = []byte("Some test mail\n.blablabla\n") | ||
| compare(t, data, expected) | ||
|
|
||
| data = []byte("Some test mail\n.blablabla\n.\n") | ||
| expected = []byte("Some test mail\nblablabla\n") | ||
| compare(t, data, expected) | ||
|
|
||
| // first line is 1000 chars | ||
| data = []byte("aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd\n.\n") | ||
| expected = []byte("aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd\n") | ||
| compare(t, data, expected) | ||
|
|
||
| // first line is 1001 chars but starts with a dot, so server should see it as 1000 | ||
| data = []byte(".aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsdddddd\n.\n") | ||
| expected = []byte("aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsdddddd\n") | ||
| compare(t, data, expected) | ||
|
|
||
| // first line is 1000 chars, second 10, third 1000 | ||
| data = []byte("aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd\naj ge je a t\naafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd\n.\n") | ||
| expected = []byte("aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd\naj ge je a t\naafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd\n") | ||
| compare(t, data, expected) | ||
| } | ||
|
|
||
| func TestDataReaderInvalid(t *testing.T) { | ||
| data := []byte("Some test mail\nblablabla\nno ending dot") | ||
| expectError(t, data, ErrIncomplete) | ||
|
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| data = []byte("Some test mail\r\nDot on invalid place\n.test") | ||
| expectError(t, data, ErrIncomplete) | ||
|
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| data = []byte("") | ||
| expectError(t, data, ErrIncomplete) | ||
| } | ||
|
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||
| func TestDataReaderTooLong(t *testing.T) { | ||
| // length === 1001 | ||
| data := []byte("aafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd3\n") | ||
| expectError(t, data, ErrLtl) | ||
|
|
||
| // first line is small, second is 1003 | ||
| data = []byte("Some text :)\naafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddddddddfsdaafsddddddd321\n") | ||
| expectError(t, data, ErrLtl) | ||
| } |
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