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server_test.go
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package smtp_test
import (
"bufio"
"bytes"
"context"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"strings"
"sync"
"testing"
"time"
"github.com/emersion/go-sasl"
"github.com/emersion/go-smtp"
)
type message struct {
From string
To []string
RcptOpts []*smtp.RcptOptions
Data []byte
Opts *smtp.MailOptions
}
type backend struct {
authDisabled bool
messages []*message
anonmsgs []*message
implementLMTPData bool
lmtpStatus []struct {
addr string
err error
}
lmtpStatusSync chan struct{}
// Errors returned by Data method.
dataErrors chan error
// Error that will be returned by Data method.
dataErr error
// Read N bytes of message before returning dataErr.
dataErrOffset int64
panicOnMail bool
userErr error
}
func (be *backend) NewSession(_ *smtp.Conn) (smtp.Session, error) {
if be.implementLMTPData {
return &lmtpSession{&session{backend: be, anonymous: true}}, nil
}
return &session{backend: be, anonymous: true}, nil
}
type lmtpSession struct {
*session
}
type session struct {
backend *backend
anonymous bool
msg *message
}
var _ smtp.AuthSession = (*session)(nil)
func (s *session) AuthMechanisms() []string {
if s.backend.authDisabled {
return nil
}
return []string{sasl.Plain}
}
func (s *session) Auth(mech string) (sasl.Server, error) {
if s.backend.authDisabled {
return nil, smtp.ErrAuthUnsupported
}
return sasl.NewPlainServer(func(identity, username, password string) error {
if identity != "" && identity != username {
return errors.New("Invalid identity")
}
if username != "username" || password != "password" {
return errors.New("Invalid username or password")
}
s.anonymous = false
return nil
}), nil
}
func (s *session) Reset() {
s.msg = &message{}
}
func (s *session) Logout() error {
return nil
}
func (s *session) Mail(from string, opts *smtp.MailOptions) error {
if s.backend.userErr != nil {
return s.backend.userErr
}
if s.backend.panicOnMail {
panic("Everything is on fire!")
}
s.Reset()
s.msg.From = from
s.msg.Opts = opts
return nil
}
func (s *session) Rcpt(to string, opts *smtp.RcptOptions) error {
s.msg.To = append(s.msg.To, to)
s.msg.RcptOpts = append(s.msg.RcptOpts, opts)
return nil
}
func (s *session) Data(r io.Reader) error {
if s.backend.dataErr != nil {
if s.backend.dataErrOffset != 0 {
io.CopyN(ioutil.Discard, r, s.backend.dataErrOffset)
}
err := s.backend.dataErr
if s.backend.dataErrors != nil {
s.backend.dataErrors <- err
}
return err
}
if b, err := ioutil.ReadAll(r); err != nil {
if s.backend.dataErrors != nil {
s.backend.dataErrors <- err
}
return err
} else {
s.msg.Data = b
if s.anonymous {
s.backend.anonmsgs = append(s.backend.anonmsgs, s.msg)
} else {
s.backend.messages = append(s.backend.messages, s.msg)
}
if s.backend.dataErrors != nil {
s.backend.dataErrors <- nil
}
}
return nil
}
func (s *session) LMTPData(r io.Reader, collector smtp.StatusCollector) error {
if err := s.Data(r); err != nil {
return err
}
for _, val := range s.backend.lmtpStatus {
collector.SetStatus(val.addr, val.err)
if s.backend.lmtpStatusSync != nil {
s.backend.lmtpStatusSync <- struct{}{}
}
}
return nil
}
type failingListener struct {
c chan error
closed bool
mu sync.Mutex
}
func newFailingListener() *failingListener {
return &failingListener{c: make(chan error)}
}
func (l *failingListener) Send(err error) {
l.mu.Lock()
defer l.mu.Unlock()
if !l.closed {
l.c <- err
}
}
func (l *failingListener) Accept() (net.Conn, error) {
return nil, <-l.c
}
func (l *failingListener) Close() error {
l.mu.Lock()
defer l.mu.Unlock()
if !l.closed {
close(l.c)
l.closed = true
}
return nil
}
func (l *failingListener) Addr() net.Addr {
return &net.TCPAddr{
IP: net.ParseIP("127.0.0.1"),
Port: 12345,
}
}
type mockError struct {
msg string
temporary bool
}
func newMockError(msg string, temporary bool) *mockError {
return &mockError{
msg: msg,
temporary: temporary,
}
}
func (m *mockError) Error() string { return m.msg }
func (m *mockError) String() string { return m.msg }
func (m *mockError) Timeout() bool { return false }
func (m *mockError) Temporary() bool { return m.temporary }
type serverConfigureFunc func(*smtp.Server)
var (
authDisabled = func(s *smtp.Server) {
s.Backend.(*backend).authDisabled = true
}
)
func testServer(t *testing.T, fn ...serverConfigureFunc) (be *backend, s *smtp.Server, c net.Conn, scanner *bufio.Scanner) {
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatal(err)
}
be = new(backend)
s = smtp.NewServer(be)
s.Domain = "localhost"
s.AllowInsecureAuth = true
for _, f := range fn {
f(s)
}
go s.Serve(l)
c, err = net.Dial("tcp", l.Addr().String())
if err != nil {
t.Fatal(err)
}
scanner = bufio.NewScanner(c)
return
}
func testServerGreeted(t *testing.T, fn ...serverConfigureFunc) (be *backend, s *smtp.Server, c net.Conn, scanner *bufio.Scanner) {
be, s, c, scanner = testServer(t, fn...)
scanner.Scan()
if scanner.Text() != "220 localhost ESMTP Service Ready" {
t.Fatal("Invalid greeting:", scanner.Text())
}
return
}
func testServerEhlo(t *testing.T, fn ...serverConfigureFunc) (be *backend, s *smtp.Server, c net.Conn, scanner *bufio.Scanner, caps map[string]bool) {
be, s, c, scanner = testServerGreeted(t, fn...)
io.WriteString(c, "EHLO localhost\r\n")
scanner.Scan()
if scanner.Text() != "250-Hello localhost" {
t.Fatal("Invalid EHLO response:", scanner.Text())
}
expectedCaps := []string{"PIPELINING", "8BITMIME"}
caps = make(map[string]bool)
for scanner.Scan() {
s := scanner.Text()
if strings.HasPrefix(s, "250 ") {
caps[strings.TrimPrefix(s, "250 ")] = true
break
} else {
if !strings.HasPrefix(s, "250-") {
t.Fatal("Invalid capability response:", s)
}
caps[strings.TrimPrefix(s, "250-")] = true
}
}
for _, cap := range expectedCaps {
if !caps[cap] {
t.Fatal("Missing capability:", cap)
}
}
return
}
func TestServerAcceptErrorHandling(t *testing.T) {
errorLog := bytes.NewBuffer(nil)
be := new(backend)
s := smtp.NewServer(be)
s.Domain = "localhost"
s.AllowInsecureAuth = true
s.ErrorLog = log.New(errorLog, "", 0)
l := newFailingListener()
done := make(chan error, 1)
go func() {
done <- s.Serve(l)
l.Close()
}()
temporaryError := newMockError("temporary mock error", true)
l.Send(temporaryError)
permanentError := newMockError("permanent mock error", false)
l.Send(permanentError)
s.Close()
serveError := <-done
if serveError == nil {
t.Fatal("Serve had exited without an expected error")
} else if serveError != permanentError {
t.Fatal("Unexpected error:", serveError)
}
if !strings.Contains(errorLog.String(), temporaryError.String()) {
t.Fatal("Missing temporary error in log output:", errorLog.String())
}
}
func TestServer_helo(t *testing.T) {
_, s, c, scanner := testServerGreeted(t)
defer s.Close()
io.WriteString(c, "HELO localhost\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid HELO response:", scanner.Text())
}
}
func testServerAuthenticated(t *testing.T) (be *backend, s *smtp.Server, c net.Conn, scanner *bufio.Scanner) {
be, s, c, scanner, caps := testServerEhlo(t)
if _, ok := caps["AUTH PLAIN"]; !ok {
t.Fatal("AUTH PLAIN capability is missing when auth is enabled")
}
io.WriteString(c, "AUTH PLAIN\r\n")
scanner.Scan()
if scanner.Text() != "334 " {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
io.WriteString(c, "AHVzZXJuYW1lAHBhc3N3b3Jk\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "235 ") {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
return
}
func TestServerAuthTwice(t *testing.T) {
_, _, c, scanner, caps := testServerEhlo(t)
if _, ok := caps["AUTH PLAIN"]; !ok {
t.Fatal("AUTH PLAIN capability is missing when auth is enabled")
}
io.WriteString(c, "AUTH PLAIN AHVzZXJuYW1lAHBhc3N3b3Jk\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "235 ") {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
io.WriteString(c, "AUTH PLAIN AHVzZXJuYW1lAHBhc3N3b3Jk\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "503 ") {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
io.WriteString(c, "RSET\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
io.WriteString(c, "AUTH PLAIN AHVzZXJuYW1lAHBhc3N3b3Jk\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "503 ") {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
}
func TestServerCancelSASL(t *testing.T) {
_, _, c, scanner, caps := testServerEhlo(t)
if _, ok := caps["AUTH PLAIN"]; !ok {
t.Fatal("AUTH PLAIN capability is missing when auth is enabled")
}
io.WriteString(c, "AUTH PLAIN\r\n")
scanner.Scan()
if scanner.Text() != "334 " {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
io.WriteString(c, "*\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "501 ") {
t.Fatal("Invalid AUTH response:", scanner.Text())
}
}
func TestServerEmptyFrom1(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerEmptyFrom2(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerPanicRecover(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
s.Backend.(*backend).panicOnMail = true
// Don't log panic in tests to not confuse people who run 'go test'.
s.ErrorLog = log.New(ioutil.Discard, "", 0)
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "421 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerSMTPUTF8(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
s.EnableSMTPUTF8 = true
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> SMTPUTF8\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerSMTPUTF8_Disabled(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> SMTPUTF8\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServer8BITMIME(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> BODY=8bitMIME\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServer_BODYInvalidValue(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> BODY=RABIIT\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerUnknownArg(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> RABIIT\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerBadSize(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> SIZE=rabbit\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerTooBig(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
s.MaxMessageBytes = 4294967294
io.WriteString(c, "MAIL FROM:<[email protected]> SIZE=4294967295\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
}
func TestServerEmptyTo(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
io.WriteString(c, "RCPT TO:\r\n")
scanner.Scan()
if strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid RCPT response:", scanner.Text())
}
}
func TestServer(t *testing.T) {
be, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid RCPT response:", scanner.Text())
}
io.WriteString(c, "DATA\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "354 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
io.WriteString(c, "From: [email protected]\r\n")
io.WriteString(c, "\r\n")
io.WriteString(c, "Hey\r <3\r\n")
io.WriteString(c, "..this dot is fine\r\n")
io.WriteString(c, ".\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
if len(be.messages) != 1 || len(be.anonmsgs) != 0 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
msg := be.messages[0]
if msg.From != "[email protected]" {
t.Fatal("Invalid mail sender:", msg.From)
}
if len(msg.To) != 1 || msg.To[0] != "[email protected]" {
t.Fatal("Invalid mail recipients:", msg.To)
}
if string(msg.Data) != "From: [email protected]\r\n\r\nHey\r <3\r\n.this dot is fine\r\n" {
t.Fatal("Invalid mail data:", string(msg.Data))
}
}
func TestServer_LFDotLF(t *testing.T) {
be, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid RCPT response:", scanner.Text())
}
io.WriteString(c, "DATA\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "354 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
io.WriteString(c, "From: [email protected]\r\n")
io.WriteString(c, "\r\n")
io.WriteString(c, "hey\r\n")
io.WriteString(c, "\n.\n")
io.WriteString(c, "this is going to break your server\r\n")
io.WriteString(c, ".\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
if len(be.messages) != 1 || len(be.anonmsgs) != 0 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
msg := be.messages[0]
if string(msg.Data) != "From: [email protected]\r\n\r\nhey\r\n\n.\nthis is going to break your server\r\n" {
t.Fatal("Invalid mail data:", string(msg.Data))
}
}
func TestServer_EmptyMessage(t *testing.T) {
be, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid RCPT response:", scanner.Text())
}
io.WriteString(c, "DATA\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "354 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
io.WriteString(c, "\r\n\r\n.\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
if len(be.messages) != 1 || len(be.anonmsgs) != 0 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
msg := be.messages[0]
if string(msg.Data) != "\r\n\r\n" {
t.Fatal("Invalid mail data:", string(msg.Data), msg.Data)
}
}
func TestServer_authDisabled(t *testing.T) {
_, s, c, scanner, caps := testServerEhlo(t, authDisabled)
defer s.Close()
defer c.Close()
if _, ok := caps["AUTH PLAIN"]; ok {
t.Fatal("AUTH PLAIN capability is present when auth is disabled")
}
io.WriteString(c, "AUTH PLAIN\r\n")
scanner.Scan()
if scanner.Text() != "502 5.7.0 Authentication not supported" {
t.Fatal("Invalid AUTH response with auth disabled:", scanner.Text())
}
}
func TestServer_otherCommands(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
io.WriteString(c, "HELP\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "502 ") {
t.Fatal("Invalid HELP response:", scanner.Text())
}
io.WriteString(c, "VRFY\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "252 ") {
t.Fatal("Invalid VRFY response:", scanner.Text())
}
io.WriteString(c, "NOOP\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid NOOP response:", scanner.Text())
}
io.WriteString(c, "RSET\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid RSET response:", scanner.Text())
}
io.WriteString(c, "QUIT\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "221 ") {
t.Fatal("Invalid QUIT response:", scanner.Text())
}
}
func TestServer_tooManyInvalidCommands(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
// Let's assume XXXX is a non-existing command
for i := 0; i < 4; i++ {
io.WriteString(c, "XXXX\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "500 ") {
t.Fatal("Invalid invalid command response:", scanner.Text())
}
}
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "500 ") {
t.Fatal("Invalid invalid command response:", scanner.Text())
}
}
func TestServer_tooLongMessage(t *testing.T) {
be, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
s.MaxMessageBytes = 50
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
io.WriteString(c, "DATA\r\n")
scanner.Scan()
io.WriteString(c, "This is a very long message.\r\n")
io.WriteString(c, "Much longer than you can possibly imagine.\r\n")
io.WriteString(c, "And much longer than the server's MaxMessageBytes.\r\n")
io.WriteString(c, ".\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "552 ") {
t.Fatal("Invalid DATA response, expected an error but got:", scanner.Text())
}
if len(be.messages) != 0 || len(be.anonmsgs) != 0 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
}
// See https://www.postfix.org/smtp-smuggling.html
func TestServer_smtpSmuggling(t *testing.T) {
cases := []struct {
name string
lines []string
expected string
}{
{
name: "<CR><LF>.<LF>",
lines: []string{
"This is a message with an SMTP smuggling dot:\r\n",
".\n",
"Final dot comes after.\r\n",
".\r\n",
},
expected: "This is a message with an SMTP smuggling dot:\r\n\nFinal dot comes after.\r\n",
},
{
name: "<LF>.<CR><LF>",
lines: []string{
"This is a message with an SMTP smuggling dot:\n", // not a line on its own
".\r\n",
"Final dot comes after.\r\n",
".\r\n",
},
expected: "This is a message with an SMTP smuggling dot:\n.\r\nFinal dot comes after.\r\n",
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
be, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
io.WriteString(c, "DATA\r\n")
scanner.Scan()
for _, line := range tc.lines {
io.WriteString(c, line)
}
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA response, expected an error but got:", scanner.Text())
}
if len(be.messages) != 1 {
t.Fatal("Invalid number of sent messages:", len(be.messages))
}
msg := be.messages[0]
if string(msg.Data) != tc.expected {
t.Fatalf("Invalid mail data: %q", string(msg.Data))
}
})
}
}
func TestServer_tooLongLine(t *testing.T) {
_, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
io.WriteString(c, "MAIL FROM:<[email protected]> "+strings.Repeat("A", 2000))
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "500 ") {
t.Fatal("Invalid response, expected an error but got:", scanner.Text())
}
}
func TestServer_anonymousUserError(t *testing.T) {
be, s, c, scanner, _ := testServerEhlo(t)
defer s.Close()
defer c.Close()
be.userErr = smtp.ErrAuthRequired
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if scanner.Text() != "502 5.7.0 Please authenticate first" {
t.Fatal("Backend refused anonymous mail but client was permitted:", scanner.Text())
}
}
func TestServer_anonymousUserOK(t *testing.T) {
be, s, c, scanner, _ := testServerEhlo(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM: [email protected]\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
io.WriteString(c, "DATA\r\n")
scanner.Scan()
io.WriteString(c, "Hey <3\r\n")
io.WriteString(c, ".\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
if len(be.messages) != 0 || len(be.anonmsgs) != 1 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
}
func TestServer_authParam(t *testing.T) {
be, s, c, scanner, _ := testServerEhlo(t)
defer s.Close()
defer c.Close()
// Invalid HEXCHAR
io.WriteString(c, "MAIL FROM: [email protected] AUTH=<hey+A>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "500 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
// Invalid HEXCHAR
io.WriteString(c, "MAIL FROM: [email protected] AUTH=<he+YYa>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "500 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
// https://tools.ietf.org/html/rfc4954#section-4
// >servers that advertise support for this
// >extension MUST support the AUTH parameter to the MAIL FROM
// >command even when the client has not authenticated itself to the
// >server.
io.WriteString(c, "MAIL FROM: [email protected] [email protected]\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
// Go on as usual.
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
io.WriteString(c, "DATA\r\n")
scanner.Scan()
io.WriteString(c, "Hey <3\r\n")
io.WriteString(c, ".\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA response:", scanner.Text())
}
if len(be.messages) != 0 || len(be.anonmsgs) != 1 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
if val := be.anonmsgs[0].Opts.Auth; val == nil || *val != "[email protected]" {
t.Fatal("Invalid Auth value:", val)
}
}
func TestServer_Chunking(t *testing.T) {
be, s, c, scanner := testServerAuthenticated(t)
defer s.Close()
defer c.Close()
io.WriteString(c, "MAIL FROM:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid MAIL response:", scanner.Text())
}
io.WriteString(c, "RCPT TO:<[email protected]>\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid RCPT response:", scanner.Text())
}
io.WriteString(c, "BDAT 8\r\n")
io.WriteString(c, "Hey <3\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid BDAT response:", scanner.Text())
}
io.WriteString(c, "BDAT 8 LAST\r\n")
io.WriteString(c, "Hey :3\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid BDAT response:", scanner.Text())
}
if len(be.messages) != 1 || len(be.anonmsgs) != 0 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}