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5b20cba50a
we don't want external software to include internal details like mlog. slog.Logger is/will be the standard. we still have mlog for its helper functions, and its handler that logs in concise logfmt used by mox. packages that are not meant for reuse still pass around mlog.Log for convenience. we use golang.org/x/exp/slog because we also support the previous Go toolchain version. with the next Go release, we'll switch to the builtin slog.
115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
package smtpserver
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import (
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"fmt"
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"net"
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/mjl-/mox/dns"
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"github.com/mjl-/mox/mlog"
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"github.com/mjl-/mox/mox-"
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"github.com/mjl-/mox/queue"
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"github.com/mjl-/mox/store"
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)
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// Fuzz the server. For each fuzz string, we set up servers in various connection states, and write the string as command.
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func FuzzServer(f *testing.F) {
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f.Add("HELO remote")
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f.Add("EHLO remote")
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f.Add("AUTH PLAIN")
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f.Add("MAIL FROM:<remote@remote>")
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f.Add("RCPT TO:<local@mox.example>")
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f.Add("DATA")
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f.Add(".")
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f.Add("RSET")
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f.Add("VRFY x")
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f.Add("EXPN x")
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f.Add("HELP")
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f.Add("NOOP")
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f.Add("QUIT")
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log := mlog.New("smtpserver", nil)
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mox.Context = ctxbg
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mox.ConfigStaticPath = filepath.FromSlash("../testdata/smtpserverfuzz/mox.conf")
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mox.MustLoadConfig(true, false)
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dataDir := mox.ConfigDirPath(mox.Conf.Static.DataDir)
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os.RemoveAll(dataDir)
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acc, err := store.OpenAccount(log, "mjl")
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if err != nil {
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f.Fatalf("open account: %v", err)
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}
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defer acc.Close()
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err = acc.SetPassword(log, "testtest")
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if err != nil {
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f.Fatalf("set password: %v", err)
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}
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defer store.Switchboard()()
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err = queue.Init()
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if err != nil {
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f.Fatalf("queue init: %v", err)
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}
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defer queue.Shutdown()
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comm := store.RegisterComm(acc)
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defer comm.Unregister()
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var cid int64 = 1
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var fl *os.File
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if false {
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fl, err = os.Create("fuzz.log")
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if err != nil {
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f.Fatalf("fuzz log")
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}
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defer fl.Close()
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}
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flog := func(err error, msg string) {
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if fl != nil && err != nil {
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fmt.Fprintf(fl, "%s: %v\n", msg, err)
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}
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}
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f.Fuzz(func(t *testing.T, s string) {
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run := func(cmds []string) {
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limitersInit() // Reset rate limiters.
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serverConn, clientConn := net.Pipe()
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defer serverConn.Close()
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defer clientConn.Close()
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go func() {
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err := clientConn.SetDeadline(time.Now().Add(time.Second))
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flog(err, "set client deadline")
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_, err = clientConn.Read(make([]byte, 1024))
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flog(err, "read ehlo")
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for _, cmd := range cmds {
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_, err = clientConn.Write([]byte(cmd + "\r\n"))
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flog(err, "write command")
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_, err = clientConn.Read(make([]byte, 1024))
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flog(err, "read response")
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}
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_, err = clientConn.Write([]byte(s + "\r\n"))
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flog(err, "write test command")
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_, err = clientConn.Read(make([]byte, 1024))
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flog(err, "read test response")
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clientConn.Close()
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serverConn.Close()
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}()
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resolver := dns.MockResolver{}
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const submission = false
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err := serverConn.SetDeadline(time.Now().Add(time.Second))
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flog(err, "set server deadline")
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serve("test", cid, dns.Domain{ASCII: "mox.example"}, nil, serverConn, resolver, submission, false, 100<<10, false, false, false, nil, 0)
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cid++
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}
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run([]string{})
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run([]string{"EHLO remote"})
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run([]string{"EHLO remote", "MAIL FROM:<remote@example.org>"})
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run([]string{"EHLO remote", "MAIL FROM:<remote@example.org>", "RCPT TO:<mjl@mox.example>"})
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// todo: submission with login
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})
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}
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