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// Copyright 2011 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 packet
import (
"bytes"
"crypto/openpgp/error"
"encoding/hex"
"fmt"
"io"
"io/ioutil"
"os"
"testing"
)
func TestReadFull(t *testing.T) {
var out [4]byte
b := bytes.NewBufferString("foo")
n, err := readFull(b, out[:3])
if n != 3 || err != nil {
t.Errorf("full read failed n:%d err:%s", n, err)
}
b = bytes.NewBufferString("foo")
n, err = readFull(b, out[:4])
if n != 3 || err != io.ErrUnexpectedEOF {
t.Errorf("partial read failed n:%d err:%s", n, err)
}
b = bytes.NewBuffer(nil)
n, err = readFull(b, out[:3])
if n != 0 || err != io.ErrUnexpectedEOF {
t.Errorf("empty read failed n:%d err:%s", n, err)
}
}
func readerFromHex(s string) io.Reader {
data, err := hex.DecodeString(s)
if err != nil {
panic("readerFromHex: bad input")
}
return bytes.NewBuffer(data)
}
var readLengthTests = []struct {
hexInput string
length int64
isPartial bool
err os.Error
}{
{"", 0, false, io.ErrUnexpectedEOF},
{"1f", 31, false, nil},
{"c0", 0, false, io.ErrUnexpectedEOF},
{"c101", 256 + 1 + 192, false, nil},
{"e0", 1, true, nil},
{"e1", 2, true, nil},
{"e2", 4, true, nil},
{"ff", 0, false, io.ErrUnexpectedEOF},
{"ff00", 0, false, io.ErrUnexpectedEOF},
{"ff0000", 0, false, io.ErrUnexpectedEOF},
{"ff000000", 0, false, io.ErrUnexpectedEOF},
{"ff00000000", 0, false, nil},
{"ff01020304", 16909060, false, nil},
}
func TestReadLength(t *testing.T) {
for i, test := range readLengthTests {
length, isPartial, err := readLength(readerFromHex(test.hexInput))
if test.err != nil {
if err != test.err {
t.Errorf("%d: expected different error got:%s want:%s", i, err, test.err)
}
continue
}
if err != nil {
t.Errorf("%d: unexpected error: %s", i, err)
continue
}
if length != test.length || isPartial != test.isPartial {
t.Errorf("%d: bad result got:(%d,%t) want:(%d,%t)", i, length, isPartial, test.length, test.isPartial)
}
}
}
var partialLengthReaderTests = []struct {
hexInput string
err os.Error
hexOutput string
}{
{"e0", io.ErrUnexpectedEOF, ""},
{"e001", io.ErrUnexpectedEOF, ""},
{"e0010102", nil, "0102"},
{"ff00000000", nil, ""},
{"e10102e1030400", nil, "01020304"},
{"e101", io.ErrUnexpectedEOF, ""},
}
func TestPartialLengthReader(t *testing.T) {
for i, test := range partialLengthReaderTests {
r := &partialLengthReader{readerFromHex(test.hexInput), 0, true}
out, err := ioutil.ReadAll(r)
if test.err != nil {
if err != test.err {
t.Errorf("%d: expected different error got:%s want:%s", i, err, test.err)
}
continue
}
if err != nil {
t.Errorf("%d: unexpected error: %s", i, err)
continue
}
got := fmt.Sprintf("%x", out)
if got != test.hexOutput {
t.Errorf("%d: got:%s want:%s", i, test.hexOutput, got)
}
}
}
var readHeaderTests = []struct {
hexInput string
structuralError bool
unexpectedEOF bool
tag int
length int64
hexOutput string
}{
{"", false, false, 0, 0, ""},
{"7f", true, false, 0, 0, ""},
// Old format headers
{"80", false, true, 0, 0, ""},
{"8001", false, true, 0, 1, ""},
{"800102", false, false, 0, 1, "02"},
{"81000102", false, false, 0, 1, "02"},
{"820000000102", false, false, 0, 1, "02"},
{"860000000102", false, false, 1, 1, "02"},
{"83010203", false, false, 0, -1, "010203"},
// New format headers
{"c0", false, true, 0, 0, ""},
{"c000", false, false, 0, 0, ""},
{"c00102", false, false, 0, 1, "02"},
{"c0020203", false, false, 0, 2, "0203"},
{"c00202", false, true, 0, 2, ""},
{"c3020203", false, false, 3, 2, "0203"},
}
func TestReadHeader(t *testing.T) {
for i, test := range readHeaderTests {
tag, length, contents, err := readHeader(readerFromHex(test.hexInput))
if test.structuralError {
if _, ok := err.(error.StructuralError); ok {
continue
}
t.Errorf("%d: expected StructuralError, got:%s", i, err)
continue
}
if err != nil {
if len(test.hexInput) == 0 && err == os.EOF {
continue
}
if !test.unexpectedEOF || err != io.ErrUnexpectedEOF {
t.Errorf("%d: unexpected error from readHeader: %s", i, err)
}
continue
}
if int(tag) != test.tag || length != test.length {
t.Errorf("%d: got:(%d,%d) want:(%d,%d)", i, int(tag), length, test.tag, test.length)
continue
}
body, err := ioutil.ReadAll(contents)
if err != nil {
if !test.unexpectedEOF || err != io.ErrUnexpectedEOF {
t.Errorf("%d: unexpected error from contents: %s", i, err)
}
continue
}
if test.unexpectedEOF {
t.Errorf("%d: expected ErrUnexpectedEOF from contents but got no error", i)
continue
}
got := fmt.Sprintf("%x", body)
if got != test.hexOutput {
t.Errorf("%d: got:%s want:%s", i, got, test.hexOutput)
}
}
}
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