60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
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// +build gofuzz
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package lnwirefuzz
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import (
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"bytes"
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"compress/zlib"
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"encoding/binary"
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"github.com/lightningnetwork/lnd/lnwire"
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)
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// Fuzz_reply_channel_range_zlib is used by go-fuzz.
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func Fuzz_reply_channel_range_zlib(data []byte) int {
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var buf bytes.Buffer
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zlibWriter := zlib.NewWriter(&buf)
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_, err := zlibWriter.Write(data)
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if err != nil {
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// Zlib bug?
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panic(err)
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}
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if err := zlibWriter.Close(); err != nil {
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// Zlib bug?
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panic(err)
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}
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compressedPayload := buf.Bytes()
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// Initialize some []byte vars which will prefix our payload
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chainhash := []byte("00000000000000000000000000000000")
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firstBlockHeight := []byte("\x00\x00\x00\x00")
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numBlocks := []byte("\x00\x00\x00\x00")
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completeByte := []byte("\x00")
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numBytesInBody := len(compressedPayload) + 1
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zlibByte := []byte("\x01")
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bodyBytes := make([]byte, 2)
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binary.BigEndian.PutUint16(bodyBytes, uint16(numBytesInBody))
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payload := append(chainhash, firstBlockHeight...)
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payload = append(payload, numBlocks...)
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payload = append(payload, completeByte...)
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payload = append(payload, bodyBytes...)
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payload = append(payload, zlibByte...)
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payload = append(payload, compressedPayload...)
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// Prefix with MsgReplyChannelRange.
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payload = prefixWithMsgType(payload, lnwire.MsgReplyChannelRange)
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// Create an empty message so that the FuzzHarness func can check
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// if the max payload constraint is violated.
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emptyMsg := lnwire.ReplyChannelRange{}
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// Pass the message into our general fuzz harness for wire messages!
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return harness(payload, &emptyMsg)
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}
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