80fa803875
This commit exports the ReadVarString and WriteVarString functions so they are available for callers to use. A variable length string is encoded as a variable length integer containing the length of the string followed by the bytes that represent the string itself.
759 lines
22 KiB
Go
759 lines
22 KiB
Go
// Copyright (c) 2013-2015 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package wire_test
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import (
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"bytes"
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"fmt"
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"io"
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"reflect"
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"strings"
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"testing"
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"github.com/btcsuite/btcd/wire"
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"github.com/davecgh/go-spew/spew"
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)
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// mainNetGenesisHash is the hash of the first block in the block chain for the
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// main network (genesis block).
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var mainNetGenesisHash = wire.ShaHash([wire.HashSize]byte{ // Make go vet happy.
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0x6f, 0xe2, 0x8c, 0x0a, 0xb6, 0xf1, 0xb3, 0x72,
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0xc1, 0xa6, 0xa2, 0x46, 0xae, 0x63, 0xf7, 0x4f,
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0x93, 0x1e, 0x83, 0x65, 0xe1, 0x5a, 0x08, 0x9c,
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0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
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})
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// mainNetGenesisMerkleRoot is the hash of the first transaction in the genesis
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// block for the main network.
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var mainNetGenesisMerkleRoot = wire.ShaHash([wire.HashSize]byte{ // Make go vet happy.
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0x3b, 0xa3, 0xed, 0xfd, 0x7a, 0x7b, 0x12, 0xb2,
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0x7a, 0xc7, 0x2c, 0x3e, 0x67, 0x76, 0x8f, 0x61,
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0x7f, 0xc8, 0x1b, 0xc3, 0x88, 0x8a, 0x51, 0x32,
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0x3a, 0x9f, 0xb8, 0xaa, 0x4b, 0x1e, 0x5e, 0x4a,
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})
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// fakeRandReader implements the io.Reader interface and is used to force
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// errors in the RandomUint64 function.
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type fakeRandReader struct {
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n int
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err error
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}
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// Read returns the fake reader error and the lesser of the fake reader value
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// and the length of p.
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func (r *fakeRandReader) Read(p []byte) (int, error) {
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n := r.n
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if n > len(p) {
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n = len(p)
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}
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return n, r.err
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}
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// TestElementWire tests wire encode and decode for various element types. This
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// is mainly to test the "fast" paths in readElement and writeElement which use
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// type assertions to avoid reflection when possible.
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func TestElementWire(t *testing.T) {
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type writeElementReflect int32
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tests := []struct {
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in interface{} // Value to encode
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buf []byte // Wire encoding
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}{
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{int32(1), []byte{0x01, 0x00, 0x00, 0x00}},
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{uint32(256), []byte{0x00, 0x01, 0x00, 0x00}},
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{
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int64(65536),
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[]byte{0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00},
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},
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{
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uint64(4294967296),
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[]byte{0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00},
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},
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{
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true,
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[]byte{0x01},
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},
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{
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false,
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[]byte{0x00},
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},
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{
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[4]byte{0x01, 0x02, 0x03, 0x04},
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[]byte{0x01, 0x02, 0x03, 0x04},
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},
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{
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[wire.CommandSize]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c,
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},
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[]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c,
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},
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},
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{
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[16]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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},
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[]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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},
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},
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{
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(*wire.ShaHash)(&[wire.HashSize]byte{ // Make go vet happy.
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
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0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
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}),
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[]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
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0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
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},
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},
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{
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wire.ServiceFlag(wire.SFNodeNetwork),
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[]byte{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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},
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{
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wire.InvType(wire.InvTypeTx),
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[]byte{0x01, 0x00, 0x00, 0x00},
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},
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{
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wire.BitcoinNet(wire.MainNet),
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[]byte{0xf9, 0xbe, 0xb4, 0xd9},
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},
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// Type not supported by the "fast" path and requires reflection.
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{
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writeElementReflect(1),
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[]byte{0x01, 0x00, 0x00, 0x00},
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},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Write to wire format.
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var buf bytes.Buffer
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err := wire.TstWriteElement(&buf, test.in)
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if err != nil {
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t.Errorf("writeElement #%d error %v", i, err)
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continue
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}
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if !bytes.Equal(buf.Bytes(), test.buf) {
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t.Errorf("writeElement #%d\n got: %s want: %s", i,
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spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
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continue
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}
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// Read from wire format.
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rbuf := bytes.NewReader(test.buf)
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val := test.in
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if reflect.ValueOf(test.in).Kind() != reflect.Ptr {
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val = reflect.New(reflect.TypeOf(test.in)).Interface()
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}
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err = wire.TstReadElement(rbuf, val)
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if err != nil {
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t.Errorf("readElement #%d error %v", i, err)
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continue
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}
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ival := val
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if reflect.ValueOf(test.in).Kind() != reflect.Ptr {
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ival = reflect.Indirect(reflect.ValueOf(val)).Interface()
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}
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if !reflect.DeepEqual(ival, test.in) {
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t.Errorf("readElement #%d\n got: %s want: %s", i,
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spew.Sdump(ival), spew.Sdump(test.in))
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continue
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}
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}
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}
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// TestElementWireErrors performs negative tests against wire encode and decode
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// of various element types to confirm error paths work correctly.
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func TestElementWireErrors(t *testing.T) {
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tests := []struct {
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in interface{} // Value to encode
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max int // Max size of fixed buffer to induce errors
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writeErr error // Expected write error
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readErr error // Expected read error
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}{
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{int32(1), 0, io.ErrShortWrite, io.EOF},
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{uint32(256), 0, io.ErrShortWrite, io.EOF},
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{int64(65536), 0, io.ErrShortWrite, io.EOF},
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{true, 0, io.ErrShortWrite, io.EOF},
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{[4]byte{0x01, 0x02, 0x03, 0x04}, 0, io.ErrShortWrite, io.EOF},
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{
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[wire.CommandSize]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c,
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},
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0, io.ErrShortWrite, io.EOF,
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},
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{
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[16]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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},
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0, io.ErrShortWrite, io.EOF,
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},
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{
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(*wire.ShaHash)(&[wire.HashSize]byte{ // Make go vet happy.
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
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0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
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}),
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0, io.ErrShortWrite, io.EOF,
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},
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{wire.ServiceFlag(wire.SFNodeNetwork), 0, io.ErrShortWrite, io.EOF},
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{wire.InvType(wire.InvTypeTx), 0, io.ErrShortWrite, io.EOF},
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{wire.BitcoinNet(wire.MainNet), 0, io.ErrShortWrite, io.EOF},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Encode to wire format.
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w := newFixedWriter(test.max)
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err := wire.TstWriteElement(w, test.in)
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if err != test.writeErr {
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t.Errorf("writeElement #%d wrong error got: %v, want: %v",
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i, err, test.writeErr)
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continue
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}
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// Decode from wire format.
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r := newFixedReader(test.max, nil)
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val := test.in
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if reflect.ValueOf(test.in).Kind() != reflect.Ptr {
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val = reflect.New(reflect.TypeOf(test.in)).Interface()
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}
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err = wire.TstReadElement(r, val)
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if err != test.readErr {
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t.Errorf("readElement #%d wrong error got: %v, want: %v",
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i, err, test.readErr)
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continue
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}
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}
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}
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// TestVarIntWire tests wire encode and decode for variable length integers.
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func TestVarIntWire(t *testing.T) {
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pver := wire.ProtocolVersion
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tests := []struct {
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in uint64 // Value to encode
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out uint64 // Expected decoded value
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buf []byte // Wire encoding
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pver uint32 // Protocol version for wire encoding
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}{
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// Latest protocol version.
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// Single byte
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{0, 0, []byte{0x00}, pver},
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// Max single byte
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{0xfc, 0xfc, []byte{0xfc}, pver},
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// Min 2-byte
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{0xfd, 0xfd, []byte{0xfd, 0x0fd, 0x00}, pver},
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// Max 2-byte
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{0xffff, 0xffff, []byte{0xfd, 0xff, 0xff}, pver},
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// Min 4-byte
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{0x10000, 0x10000, []byte{0xfe, 0x00, 0x00, 0x01, 0x00}, pver},
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// Max 4-byte
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{0xffffffff, 0xffffffff, []byte{0xfe, 0xff, 0xff, 0xff, 0xff}, pver},
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// Min 8-byte
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{
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0x100000000, 0x100000000,
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[]byte{0xff, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00},
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pver,
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},
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// Max 8-byte
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{
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0xffffffffffffffff, 0xffffffffffffffff,
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[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
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pver,
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},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Encode to wire format.
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var buf bytes.Buffer
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err := wire.TstWriteVarInt(&buf, test.pver, test.in)
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if err != nil {
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t.Errorf("writeVarInt #%d error %v", i, err)
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continue
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}
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if !bytes.Equal(buf.Bytes(), test.buf) {
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t.Errorf("writeVarInt #%d\n got: %s want: %s", i,
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spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
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continue
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}
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// Decode from wire format.
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rbuf := bytes.NewReader(test.buf)
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val, err := wire.TstReadVarInt(rbuf, test.pver)
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if err != nil {
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t.Errorf("readVarInt #%d error %v", i, err)
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continue
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}
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if val != test.out {
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t.Errorf("readVarInt #%d\n got: %d want: %d", i,
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val, test.out)
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continue
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}
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}
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}
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// TestVarIntWireErrors performs negative tests against wire encode and decode
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// of variable length integers to confirm error paths work correctly.
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func TestVarIntWireErrors(t *testing.T) {
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pver := wire.ProtocolVersion
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tests := []struct {
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in uint64 // Value to encode
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buf []byte // Wire encoding
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pver uint32 // Protocol version for wire encoding
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max int // Max size of fixed buffer to induce errors
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writeErr error // Expected write error
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readErr error // Expected read error
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}{
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// Force errors on discriminant.
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{0, []byte{0x00}, pver, 0, io.ErrShortWrite, io.EOF},
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// Force errors on 2-byte read/write.
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{0xfd, []byte{0xfd}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
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// Force errors on 4-byte read/write.
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{0x10000, []byte{0xfe}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
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// Force errors on 8-byte read/write.
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{0x100000000, []byte{0xff}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Encode to wire format.
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w := newFixedWriter(test.max)
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err := wire.TstWriteVarInt(w, test.pver, test.in)
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if err != test.writeErr {
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t.Errorf("writeVarInt #%d wrong error got: %v, want: %v",
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i, err, test.writeErr)
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continue
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}
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// Decode from wire format.
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r := newFixedReader(test.max, test.buf)
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_, err = wire.TstReadVarInt(r, test.pver)
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if err != test.readErr {
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t.Errorf("readVarInt #%d wrong error got: %v, want: %v",
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i, err, test.readErr)
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continue
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}
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}
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}
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// TestVarIntNonCanonical ensures variable length integers that are not encoded
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// canonically return the expected error.
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func TestVarIntNonCanonical(t *testing.T) {
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pver := wire.ProtocolVersion
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tests := []struct {
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name string // Test name for easier identification
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in []byte // Value to decode
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pver uint32 // Protocol version for wire encoding
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}{
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{
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"0 encoded with 3 bytes", []byte{0xfd, 0x00, 0x00},
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pver,
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},
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{
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"max single-byte value encoded with 3 bytes",
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[]byte{0xfd, 0xfc, 0x00}, pver,
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},
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{
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"0 encoded with 5 bytes",
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[]byte{0xfe, 0x00, 0x00, 0x00, 0x00}, pver,
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},
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{
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"max three-byte value encoded with 5 bytes",
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[]byte{0xfe, 0xff, 0xff, 0x00, 0x00}, pver,
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},
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{
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"0 encoded with 9 bytes",
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[]byte{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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pver,
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},
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{
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"max five-byte value encoded with 9 bytes",
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[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00},
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pver,
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},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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// Decode from wire format.
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rbuf := bytes.NewReader(test.in)
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val, err := wire.TstReadVarInt(rbuf, test.pver)
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if _, ok := err.(*wire.MessageError); !ok {
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t.Errorf("readVarInt #%d (%s) unexpected error %v", i,
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test.name, err)
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continue
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}
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if val != 0 {
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t.Errorf("readVarInt #%d (%s)\n got: %d want: 0", i,
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test.name, val)
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continue
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}
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}
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}
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// TestVarIntWire tests the serialize size for variable length integers.
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func TestVarIntSerializeSize(t *testing.T) {
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tests := []struct {
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val uint64 // Value to get the serialized size for
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size int // Expected serialized size
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}{
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// Single byte
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{0, 1},
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// Max single byte
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{0xfc, 1},
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// Min 2-byte
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{0xfd, 3},
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// Max 2-byte
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{0xffff, 3},
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// Min 4-byte
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{0x10000, 5},
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// Max 4-byte
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{0xffffffff, 5},
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// Min 8-byte
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{0x100000000, 9},
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// Max 8-byte
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{0xffffffffffffffff, 9},
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}
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t.Logf("Running %d tests", len(tests))
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for i, test := range tests {
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serializedSize := wire.VarIntSerializeSize(test.val)
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if serializedSize != test.size {
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t.Errorf("VarIntSerializeSize #%d got: %d, want: %d", i,
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serializedSize, test.size)
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continue
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}
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}
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}
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// TestVarStringWire tests wire encode and decode for variable length strings.
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func TestVarStringWire(t *testing.T) {
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pver := wire.ProtocolVersion
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// str256 is a string that takes a 2-byte varint to encode.
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str256 := strings.Repeat("test", 64)
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tests := []struct {
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in string // String to encode
|
|
out string // String to decoded value
|
|
buf []byte // Wire encoding
|
|
pver uint32 // Protocol version for wire encoding
|
|
}{
|
|
// Latest protocol version.
|
|
// Empty string
|
|
{"", "", []byte{0x00}, pver},
|
|
// Single byte varint + string
|
|
{"Test", "Test", append([]byte{0x04}, []byte("Test")...), pver},
|
|
// 2-byte varint + string
|
|
{str256, str256, append([]byte{0xfd, 0x00, 0x01}, []byte(str256)...), pver},
|
|
}
|
|
|
|
t.Logf("Running %d tests", len(tests))
|
|
for i, test := range tests {
|
|
// Encode to wire format.
|
|
var buf bytes.Buffer
|
|
err := wire.WriteVarString(&buf, test.pver, test.in)
|
|
if err != nil {
|
|
t.Errorf("WriteVarString #%d error %v", i, err)
|
|
continue
|
|
}
|
|
if !bytes.Equal(buf.Bytes(), test.buf) {
|
|
t.Errorf("WriteVarString #%d\n got: %s want: %s", i,
|
|
spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
|
|
continue
|
|
}
|
|
|
|
// Decode from wire format.
|
|
rbuf := bytes.NewReader(test.buf)
|
|
val, err := wire.ReadVarString(rbuf, test.pver)
|
|
if err != nil {
|
|
t.Errorf("ReadVarString #%d error %v", i, err)
|
|
continue
|
|
}
|
|
if val != test.out {
|
|
t.Errorf("ReadVarString #%d\n got: %s want: %s", i,
|
|
val, test.out)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestVarStringWireErrors performs negative tests against wire encode and
|
|
// decode of variable length strings to confirm error paths work correctly.
|
|
func TestVarStringWireErrors(t *testing.T) {
|
|
pver := wire.ProtocolVersion
|
|
|
|
// str256 is a string that takes a 2-byte varint to encode.
|
|
str256 := strings.Repeat("test", 64)
|
|
|
|
tests := []struct {
|
|
in string // Value to encode
|
|
buf []byte // Wire encoding
|
|
pver uint32 // Protocol version for wire encoding
|
|
max int // Max size of fixed buffer to induce errors
|
|
writeErr error // Expected write error
|
|
readErr error // Expected read error
|
|
}{
|
|
// Latest protocol version with intentional read/write errors.
|
|
// Force errors on empty string.
|
|
{"", []byte{0x00}, pver, 0, io.ErrShortWrite, io.EOF},
|
|
// Force error on single byte varint + string.
|
|
{"Test", []byte{0x04}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
|
|
// Force errors on 2-byte varint + string.
|
|
{str256, []byte{0xfd}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
|
|
}
|
|
|
|
t.Logf("Running %d tests", len(tests))
|
|
for i, test := range tests {
|
|
// Encode to wire format.
|
|
w := newFixedWriter(test.max)
|
|
err := wire.WriteVarString(w, test.pver, test.in)
|
|
if err != test.writeErr {
|
|
t.Errorf("WriteVarString #%d wrong error got: %v, want: %v",
|
|
i, err, test.writeErr)
|
|
continue
|
|
}
|
|
|
|
// Decode from wire format.
|
|
r := newFixedReader(test.max, test.buf)
|
|
_, err = wire.ReadVarString(r, test.pver)
|
|
if err != test.readErr {
|
|
t.Errorf("ReadVarString #%d wrong error got: %v, want: %v",
|
|
i, err, test.readErr)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestVarStringOverflowErrors performs tests to ensure deserializing variable
|
|
// length strings intentionally crafted to use large values for the string
|
|
// length are handled properly. This could otherwise potentially be used as an
|
|
// attack vector.
|
|
func TestVarStringOverflowErrors(t *testing.T) {
|
|
pver := wire.ProtocolVersion
|
|
|
|
tests := []struct {
|
|
buf []byte // Wire encoding
|
|
pver uint32 // Protocol version for wire encoding
|
|
err error // Expected error
|
|
}{
|
|
{[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
|
|
pver, &wire.MessageError{}},
|
|
{[]byte{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
|
|
pver, &wire.MessageError{}},
|
|
}
|
|
|
|
t.Logf("Running %d tests", len(tests))
|
|
for i, test := range tests {
|
|
// Decode from wire format.
|
|
rbuf := bytes.NewReader(test.buf)
|
|
_, err := wire.ReadVarString(rbuf, test.pver)
|
|
if reflect.TypeOf(err) != reflect.TypeOf(test.err) {
|
|
t.Errorf("ReadVarString #%d wrong error got: %v, "+
|
|
"want: %v", i, err, reflect.TypeOf(test.err))
|
|
continue
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// TestVarBytesWire tests wire encode and decode for variable length byte array.
|
|
func TestVarBytesWire(t *testing.T) {
|
|
pver := wire.ProtocolVersion
|
|
|
|
// bytes256 is a byte array that takes a 2-byte varint to encode.
|
|
bytes256 := bytes.Repeat([]byte{0x01}, 256)
|
|
|
|
tests := []struct {
|
|
in []byte // Byte Array to write
|
|
buf []byte // Wire encoding
|
|
pver uint32 // Protocol version for wire encoding
|
|
}{
|
|
// Latest protocol version.
|
|
// Empty byte array
|
|
{[]byte{}, []byte{0x00}, pver},
|
|
// Single byte varint + byte array
|
|
{[]byte{0x01}, []byte{0x01, 0x01}, pver},
|
|
// 2-byte varint + byte array
|
|
{bytes256, append([]byte{0xfd, 0x00, 0x01}, bytes256...), pver},
|
|
}
|
|
|
|
t.Logf("Running %d tests", len(tests))
|
|
for i, test := range tests {
|
|
// Encode to wire format.
|
|
var buf bytes.Buffer
|
|
err := wire.TstWriteVarBytes(&buf, test.pver, test.in)
|
|
if err != nil {
|
|
t.Errorf("writeVarBytes #%d error %v", i, err)
|
|
continue
|
|
}
|
|
if !bytes.Equal(buf.Bytes(), test.buf) {
|
|
t.Errorf("writeVarBytes #%d\n got: %s want: %s", i,
|
|
spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
|
|
continue
|
|
}
|
|
|
|
// Decode from wire format.
|
|
rbuf := bytes.NewReader(test.buf)
|
|
val, err := wire.TstReadVarBytes(rbuf, test.pver,
|
|
wire.MaxMessagePayload, "test payload")
|
|
if err != nil {
|
|
t.Errorf("readVarBytes #%d error %v", i, err)
|
|
continue
|
|
}
|
|
if !bytes.Equal(buf.Bytes(), test.buf) {
|
|
t.Errorf("readVarBytes #%d\n got: %s want: %s", i,
|
|
val, test.buf)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestVarBytesWireErrors performs negative tests against wire encode and
|
|
// decode of variable length byte arrays to confirm error paths work correctly.
|
|
func TestVarBytesWireErrors(t *testing.T) {
|
|
pver := wire.ProtocolVersion
|
|
|
|
// bytes256 is a byte array that takes a 2-byte varint to encode.
|
|
bytes256 := bytes.Repeat([]byte{0x01}, 256)
|
|
|
|
tests := []struct {
|
|
in []byte // Byte Array to write
|
|
buf []byte // Wire encoding
|
|
pver uint32 // Protocol version for wire encoding
|
|
max int // Max size of fixed buffer to induce errors
|
|
writeErr error // Expected write error
|
|
readErr error // Expected read error
|
|
}{
|
|
// Latest protocol version with intentional read/write errors.
|
|
// Force errors on empty byte array.
|
|
{[]byte{}, []byte{0x00}, pver, 0, io.ErrShortWrite, io.EOF},
|
|
// Force error on single byte varint + byte array.
|
|
{[]byte{0x01, 0x02, 0x03}, []byte{0x04}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
|
|
// Force errors on 2-byte varint + byte array.
|
|
{bytes256, []byte{0xfd}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
|
|
}
|
|
|
|
t.Logf("Running %d tests", len(tests))
|
|
for i, test := range tests {
|
|
// Encode to wire format.
|
|
w := newFixedWriter(test.max)
|
|
err := wire.TstWriteVarBytes(w, test.pver, test.in)
|
|
if err != test.writeErr {
|
|
t.Errorf("writeVarBytes #%d wrong error got: %v, want: %v",
|
|
i, err, test.writeErr)
|
|
continue
|
|
}
|
|
|
|
// Decode from wire format.
|
|
r := newFixedReader(test.max, test.buf)
|
|
_, err = wire.TstReadVarBytes(r, test.pver,
|
|
wire.MaxMessagePayload, "test payload")
|
|
if err != test.readErr {
|
|
t.Errorf("readVarBytes #%d wrong error got: %v, want: %v",
|
|
i, err, test.readErr)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestVarBytesOverflowErrors performs tests to ensure deserializing variable
|
|
// length byte arrays intentionally crafted to use large values for the array
|
|
// length are handled properly. This could otherwise potentially be used as an
|
|
// attack vector.
|
|
func TestVarBytesOverflowErrors(t *testing.T) {
|
|
pver := wire.ProtocolVersion
|
|
|
|
tests := []struct {
|
|
buf []byte // Wire encoding
|
|
pver uint32 // Protocol version for wire encoding
|
|
err error // Expected error
|
|
}{
|
|
{[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
|
|
pver, &wire.MessageError{}},
|
|
{[]byte{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
|
|
pver, &wire.MessageError{}},
|
|
}
|
|
|
|
t.Logf("Running %d tests", len(tests))
|
|
for i, test := range tests {
|
|
// Decode from wire format.
|
|
rbuf := bytes.NewReader(test.buf)
|
|
_, err := wire.TstReadVarBytes(rbuf, test.pver,
|
|
wire.MaxMessagePayload, "test payload")
|
|
if reflect.TypeOf(err) != reflect.TypeOf(test.err) {
|
|
t.Errorf("readVarBytes #%d wrong error got: %v, "+
|
|
"want: %v", i, err, reflect.TypeOf(test.err))
|
|
continue
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// TestRandomUint64 exercises the randomness of the random number generator on
|
|
// the system by ensuring the probability of the generated numbers. If the RNG
|
|
// is evenly distributed as a proper cryptographic RNG should be, there really
|
|
// should only be 1 number < 2^56 in 2^8 tries for a 64-bit number. However,
|
|
// use a higher number of 5 to really ensure the test doesn't fail unless the
|
|
// RNG is just horrendous.
|
|
func TestRandomUint64(t *testing.T) {
|
|
tries := 1 << 8 // 2^8
|
|
watermark := uint64(1 << 56) // 2^56
|
|
maxHits := 5
|
|
badRNG := "The random number generator on this system is clearly " +
|
|
"terrible since we got %d values less than %d in %d runs " +
|
|
"when only %d was expected"
|
|
|
|
numHits := 0
|
|
for i := 0; i < tries; i++ {
|
|
nonce, err := wire.RandomUint64()
|
|
if err != nil {
|
|
t.Errorf("RandomUint64 iteration %d failed - err %v",
|
|
i, err)
|
|
return
|
|
}
|
|
if nonce < watermark {
|
|
numHits++
|
|
}
|
|
if numHits > maxHits {
|
|
str := fmt.Sprintf(badRNG, numHits, watermark, tries, maxHits)
|
|
t.Errorf("Random Uint64 iteration %d failed - %v %v", i,
|
|
str, numHits)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestRandomUint64Errors uses a fake reader to force error paths to be executed
|
|
// and checks the results accordingly.
|
|
func TestRandomUint64Errors(t *testing.T) {
|
|
// Test short reads.
|
|
fr := &fakeRandReader{n: 2, err: io.EOF}
|
|
nonce, err := wire.TstRandomUint64(fr)
|
|
if err != io.ErrUnexpectedEOF {
|
|
t.Errorf("Error not expected value of %v [%v]",
|
|
io.ErrUnexpectedEOF, err)
|
|
}
|
|
if nonce != 0 {
|
|
t.Errorf("Nonce is not 0 [%v]", nonce)
|
|
}
|
|
}
|