1143 lines
28 KiB
Go
1143 lines
28 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package smtp
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import (
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"bufio"
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"bytes"
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"internal/testenv"
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"io"
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"net"
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"net/textproto"
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"runtime"
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"strings"
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"testing"
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"time"
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)
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type authTest struct {
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auth Auth
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challenges []string
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name string
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responses []string
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}
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var authTests = []authTest{
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{PlainAuth("", "user", "pass", "testserver"), []string{}, "PLAIN", []string{"\x00user\x00pass"}},
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{PlainAuth("foo", "bar", "baz", "testserver"), []string{}, "PLAIN", []string{"foo\x00bar\x00baz"}},
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{CRAMMD5Auth("user", "pass"), []string{"<123456.1322876914@testserver>"}, "CRAM-MD5", []string{"", "user 287eb355114cf5c471c26a875f1ca4ae"}},
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}
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func TestAuth(t *testing.T) {
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testLoop:
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for i, test := range authTests {
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name, resp, err := test.auth.Start(&ServerInfo{"testserver", true, nil})
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if name != test.name {
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t.Errorf("#%d got name %s, expected %s", i, name, test.name)
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}
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if !bytes.Equal(resp, []byte(test.responses[0])) {
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t.Errorf("#%d got response %s, expected %s", i, resp, test.responses[0])
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}
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if err != nil {
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t.Errorf("#%d error: %s", i, err)
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}
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for j := range test.challenges {
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challenge := []byte(test.challenges[j])
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expected := []byte(test.responses[j+1])
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resp, err := test.auth.Next(challenge, true)
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if err != nil {
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t.Errorf("#%d error: %s", i, err)
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continue testLoop
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}
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if !bytes.Equal(resp, expected) {
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t.Errorf("#%d got %s, expected %s", i, resp, expected)
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continue testLoop
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}
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}
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}
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}
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func TestAuthPlain(t *testing.T) {
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tests := []struct {
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authName string
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server *ServerInfo
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err string
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}{
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{
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authName: "servername",
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server: &ServerInfo{Name: "servername", TLS: true},
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},
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{
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// OK to use PlainAuth on localhost without TLS
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authName: "localhost",
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server: &ServerInfo{Name: "localhost", TLS: false},
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},
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{
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// NOT OK on non-localhost, even if server says PLAIN is OK.
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// (We don't know that the server is the real server.)
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authName: "servername",
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server: &ServerInfo{Name: "servername", Auth: []string{"PLAIN"}},
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err: "unencrypted connection",
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},
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{
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authName: "servername",
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server: &ServerInfo{Name: "servername", Auth: []string{"CRAM-MD5"}},
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err: "unencrypted connection",
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},
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{
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authName: "servername",
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server: &ServerInfo{Name: "attacker", TLS: true},
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err: "wrong host name",
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},
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}
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for i, tt := range tests {
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auth := PlainAuth("foo", "bar", "baz", tt.authName)
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_, _, err := auth.Start(tt.server)
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got := ""
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if err != nil {
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got = err.Error()
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}
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if got != tt.err {
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t.Errorf("%d. got error = %q; want %q", i, got, tt.err)
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}
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}
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}
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// Issue 17794: don't send a trailing space on AUTH command when there's no password.
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func TestClientAuthTrimSpace(t *testing.T) {
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server := "220 hello world\r\n" +
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"200 some more"
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var wrote bytes.Buffer
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var fake faker
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fake.ReadWriter = struct {
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io.Reader
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io.Writer
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}{
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strings.NewReader(server),
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&wrote,
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}
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c, err := NewClient(fake, "fake.host")
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if err != nil {
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t.Fatalf("NewClient: %v", err)
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}
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c.tls = true
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c.didHello = true
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c.Auth(toServerEmptyAuth{})
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c.Close()
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if got, want := wrote.String(), "AUTH FOOAUTH\r\n*\r\nQUIT\r\n"; got != want {
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t.Errorf("wrote %q; want %q", got, want)
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}
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}
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// toServerEmptyAuth is an implementation of Auth that only implements
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// the Start method, and returns "FOOAUTH", nil, nil. Notably, it returns
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// zero bytes for "toServer" so we can test that we don't send spaces at
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// the end of the line. See TestClientAuthTrimSpace.
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type toServerEmptyAuth struct{}
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func (toServerEmptyAuth) Start(server *ServerInfo) (proto string, toServer []byte, err error) {
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return "FOOAUTH", nil, nil
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}
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func (toServerEmptyAuth) Next(fromServer []byte, more bool) (toServer []byte, err error) {
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panic("unexpected call")
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}
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type faker struct {
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io.ReadWriter
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}
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func (f faker) Close() error { return nil }
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func (f faker) LocalAddr() net.Addr { return nil }
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func (f faker) RemoteAddr() net.Addr { return nil }
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func (f faker) SetDeadline(time.Time) error { return nil }
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func (f faker) SetReadDeadline(time.Time) error { return nil }
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func (f faker) SetWriteDeadline(time.Time) error { return nil }
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func TestBasic(t *testing.T) {
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server := strings.Join(strings.Split(basicServer, "\n"), "\r\n")
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client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
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var cmdbuf bytes.Buffer
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bcmdbuf := bufio.NewWriter(&cmdbuf)
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var fake faker
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fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
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c := &Client{Text: textproto.NewConn(fake), localName: "localhost"}
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if err := c.helo(); err != nil {
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t.Fatalf("HELO failed: %s", err)
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}
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if err := c.ehlo(); err == nil {
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t.Fatalf("Expected first EHLO to fail")
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}
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if err := c.ehlo(); err != nil {
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t.Fatalf("Second EHLO failed: %s", err)
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}
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c.didHello = true
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if ok, args := c.Extension("aUtH"); !ok || args != "LOGIN PLAIN" {
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t.Fatalf("Expected AUTH supported")
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}
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if ok, _ := c.Extension("DSN"); ok {
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t.Fatalf("Shouldn't support DSN")
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}
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if err := c.Mail("user@gmail.com"); err == nil {
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t.Fatalf("MAIL should require authentication")
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}
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if err := c.Verify("user1@gmail.com"); err == nil {
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t.Fatalf("First VRFY: expected no verification")
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}
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if err := c.Verify("user2@gmail.com>\r\nDATA\r\nAnother injected message body\r\n.\r\nQUIT\r\n"); err == nil {
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t.Fatalf("VRFY should have failed due to a message injection attempt")
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}
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if err := c.Verify("user2@gmail.com"); err != nil {
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t.Fatalf("Second VRFY: expected verification, got %s", err)
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}
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// fake TLS so authentication won't complain
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c.tls = true
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c.serverName = "smtp.google.com"
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if err := c.Auth(PlainAuth("", "user", "pass", "smtp.google.com")); err != nil {
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t.Fatalf("AUTH failed: %s", err)
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}
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if err := c.Rcpt("golang-nuts@googlegroups.com>\r\nDATA\r\nInjected message body\r\n.\r\nQUIT\r\n"); err == nil {
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t.Fatalf("RCPT should have failed due to a message injection attempt")
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}
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if err := c.Mail("user@gmail.com>\r\nDATA\r\nAnother injected message body\r\n.\r\nQUIT\r\n"); err == nil {
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t.Fatalf("MAIL should have failed due to a message injection attempt")
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}
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if err := c.Mail("user@gmail.com"); err != nil {
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t.Fatalf("MAIL failed: %s", err)
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}
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if err := c.Rcpt("golang-nuts@googlegroups.com"); err != nil {
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t.Fatalf("RCPT failed: %s", err)
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}
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msg := `From: user@gmail.com
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To: golang-nuts@googlegroups.com
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Subject: Hooray for Go
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Line 1
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.Leading dot line .
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Goodbye.`
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w, err := c.Data()
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if err != nil {
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t.Fatalf("DATA failed: %s", err)
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}
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if _, err := w.Write([]byte(msg)); err != nil {
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t.Fatalf("Data write failed: %s", err)
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}
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if err := w.Close(); err != nil {
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t.Fatalf("Bad data response: %s", err)
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}
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if err := c.Quit(); err != nil {
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t.Fatalf("QUIT failed: %s", err)
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}
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bcmdbuf.Flush()
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actualcmds := cmdbuf.String()
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if client != actualcmds {
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t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
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}
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}
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var basicServer = `250 mx.google.com at your service
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502 Unrecognized command.
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250-mx.google.com at your service
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250-SIZE 35651584
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250-AUTH LOGIN PLAIN
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250 8BITMIME
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530 Authentication required
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252 Send some mail, I'll try my best
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250 User is valid
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235 Accepted
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250 Sender OK
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250 Receiver OK
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354 Go ahead
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250 Data OK
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221 OK
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`
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var basicClient = `HELO localhost
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EHLO localhost
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EHLO localhost
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MAIL FROM:<user@gmail.com> BODY=8BITMIME
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VRFY user1@gmail.com
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VRFY user2@gmail.com
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AUTH PLAIN AHVzZXIAcGFzcw==
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MAIL FROM:<user@gmail.com> BODY=8BITMIME
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RCPT TO:<golang-nuts@googlegroups.com>
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DATA
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From: user@gmail.com
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To: golang-nuts@googlegroups.com
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Subject: Hooray for Go
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Line 1
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..Leading dot line .
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Goodbye.
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.
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QUIT
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`
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func TestExtensions(t *testing.T) {
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fake := func(server string) (c *Client, bcmdbuf *bufio.Writer, cmdbuf *strings.Builder) {
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server = strings.Join(strings.Split(server, "\n"), "\r\n")
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cmdbuf = &strings.Builder{}
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bcmdbuf = bufio.NewWriter(cmdbuf)
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var fake faker
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fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
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c = &Client{Text: textproto.NewConn(fake), localName: "localhost"}
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return c, bcmdbuf, cmdbuf
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}
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t.Run("helo", func(t *testing.T) {
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const (
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basicServer = `250 mx.google.com at your service
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250 Sender OK
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221 Goodbye
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`
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basicClient = `HELO localhost
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MAIL FROM:<user@gmail.com>
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QUIT
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`
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)
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c, bcmdbuf, cmdbuf := fake(basicServer)
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if err := c.helo(); err != nil {
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t.Fatalf("HELO failed: %s", err)
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}
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c.didHello = true
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if err := c.Mail("user@gmail.com"); err != nil {
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t.Fatalf("MAIL FROM failed: %s", err)
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}
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if err := c.Quit(); err != nil {
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t.Fatalf("QUIT failed: %s", err)
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}
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bcmdbuf.Flush()
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actualcmds := cmdbuf.String()
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client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
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if client != actualcmds {
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t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
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}
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})
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t.Run("ehlo", func(t *testing.T) {
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const (
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basicServer = `250-mx.google.com at your service
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250 SIZE 35651584
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250 Sender OK
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221 Goodbye
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`
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basicClient = `EHLO localhost
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MAIL FROM:<user@gmail.com>
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QUIT
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`
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)
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c, bcmdbuf, cmdbuf := fake(basicServer)
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if err := c.Hello("localhost"); err != nil {
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t.Fatalf("EHLO failed: %s", err)
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}
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if ok, _ := c.Extension("8BITMIME"); ok {
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t.Fatalf("Shouldn't support 8BITMIME")
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}
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if ok, _ := c.Extension("SMTPUTF8"); ok {
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t.Fatalf("Shouldn't support SMTPUTF8")
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}
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if err := c.Mail("user@gmail.com"); err != nil {
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t.Fatalf("MAIL FROM failed: %s", err)
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}
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if err := c.Quit(); err != nil {
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t.Fatalf("QUIT failed: %s", err)
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}
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bcmdbuf.Flush()
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actualcmds := cmdbuf.String()
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client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
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if client != actualcmds {
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t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
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}
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})
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t.Run("ehlo 8bitmime", func(t *testing.T) {
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const (
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basicServer = `250-mx.google.com at your service
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250-SIZE 35651584
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250 8BITMIME
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250 Sender OK
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221 Goodbye
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`
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basicClient = `EHLO localhost
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MAIL FROM:<user@gmail.com> BODY=8BITMIME
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QUIT
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`
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)
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c, bcmdbuf, cmdbuf := fake(basicServer)
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if err := c.Hello("localhost"); err != nil {
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t.Fatalf("EHLO failed: %s", err)
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}
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if ok, _ := c.Extension("8BITMIME"); !ok {
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t.Fatalf("Should support 8BITMIME")
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}
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if ok, _ := c.Extension("SMTPUTF8"); ok {
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t.Fatalf("Shouldn't support SMTPUTF8")
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}
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if err := c.Mail("user@gmail.com"); err != nil {
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t.Fatalf("MAIL FROM failed: %s", err)
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}
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if err := c.Quit(); err != nil {
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t.Fatalf("QUIT failed: %s", err)
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}
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bcmdbuf.Flush()
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actualcmds := cmdbuf.String()
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client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
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if client != actualcmds {
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t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
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}
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})
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t.Run("ehlo smtputf8", func(t *testing.T) {
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const (
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basicServer = `250-mx.google.com at your service
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250-SIZE 35651584
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250 SMTPUTF8
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250 Sender OK
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221 Goodbye
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`
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basicClient = `EHLO localhost
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MAIL FROM:<user+📧@gmail.com> SMTPUTF8
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QUIT
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`
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)
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c, bcmdbuf, cmdbuf := fake(basicServer)
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if err := c.Hello("localhost"); err != nil {
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t.Fatalf("EHLO failed: %s", err)
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}
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if ok, _ := c.Extension("8BITMIME"); ok {
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t.Fatalf("Shouldn't support 8BITMIME")
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}
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if ok, _ := c.Extension("SMTPUTF8"); !ok {
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t.Fatalf("Should support SMTPUTF8")
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}
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if err := c.Mail("user+📧@gmail.com"); err != nil {
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t.Fatalf("MAIL FROM failed: %s", err)
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}
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if err := c.Quit(); err != nil {
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t.Fatalf("QUIT failed: %s", err)
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}
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bcmdbuf.Flush()
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actualcmds := cmdbuf.String()
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client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
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if client != actualcmds {
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t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
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}
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})
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|
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t.Run("ehlo 8bitmime smtputf8", func(t *testing.T) {
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const (
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basicServer = `250-mx.google.com at your service
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250-SIZE 35651584
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250-8BITMIME
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250 SMTPUTF8
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250 Sender OK
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221 Goodbye
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`
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basicClient = `EHLO localhost
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MAIL FROM:<user+📧@gmail.com> BODY=8BITMIME SMTPUTF8
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QUIT
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`
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)
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c, bcmdbuf, cmdbuf := fake(basicServer)
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if err := c.Hello("localhost"); err != nil {
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t.Fatalf("EHLO failed: %s", err)
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}
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c.didHello = true
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if ok, _ := c.Extension("8BITMIME"); !ok {
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t.Fatalf("Should support 8BITMIME")
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}
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if ok, _ := c.Extension("SMTPUTF8"); !ok {
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t.Fatalf("Should support SMTPUTF8")
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}
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if err := c.Mail("user+📧@gmail.com"); err != nil {
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t.Fatalf("MAIL FROM failed: %s", err)
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}
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if err := c.Quit(); err != nil {
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t.Fatalf("QUIT failed: %s", err)
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}
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bcmdbuf.Flush()
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actualcmds := cmdbuf.String()
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client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
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if client != actualcmds {
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t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
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}
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})
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}
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|
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func TestNewClient(t *testing.T) {
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server := strings.Join(strings.Split(newClientServer, "\n"), "\r\n")
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client := strings.Join(strings.Split(newClientClient, "\n"), "\r\n")
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|
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var cmdbuf bytes.Buffer
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bcmdbuf := bufio.NewWriter(&cmdbuf)
|
|
out := func() string {
|
|
bcmdbuf.Flush()
|
|
return cmdbuf.String()
|
|
}
|
|
var fake faker
|
|
fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
|
|
c, err := NewClient(fake, "fake.host")
|
|
if err != nil {
|
|
t.Fatalf("NewClient: %v\n(after %v)", err, out())
|
|
}
|
|
defer c.Close()
|
|
if ok, args := c.Extension("aUtH"); !ok || args != "LOGIN PLAIN" {
|
|
t.Fatalf("Expected AUTH supported")
|
|
}
|
|
if ok, _ := c.Extension("DSN"); ok {
|
|
t.Fatalf("Shouldn't support DSN")
|
|
}
|
|
if err := c.Quit(); err != nil {
|
|
t.Fatalf("QUIT failed: %s", err)
|
|
}
|
|
|
|
actualcmds := out()
|
|
if client != actualcmds {
|
|
t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
|
|
}
|
|
}
|
|
|
|
var newClientServer = `220 hello world
|
|
250-mx.google.com at your service
|
|
250-SIZE 35651584
|
|
250-AUTH LOGIN PLAIN
|
|
250 8BITMIME
|
|
221 OK
|
|
`
|
|
|
|
var newClientClient = `EHLO localhost
|
|
QUIT
|
|
`
|
|
|
|
func TestNewClient2(t *testing.T) {
|
|
server := strings.Join(strings.Split(newClient2Server, "\n"), "\r\n")
|
|
client := strings.Join(strings.Split(newClient2Client, "\n"), "\r\n")
|
|
|
|
var cmdbuf bytes.Buffer
|
|
bcmdbuf := bufio.NewWriter(&cmdbuf)
|
|
var fake faker
|
|
fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
|
|
c, err := NewClient(fake, "fake.host")
|
|
if err != nil {
|
|
t.Fatalf("NewClient: %v", err)
|
|
}
|
|
defer c.Close()
|
|
if ok, _ := c.Extension("DSN"); ok {
|
|
t.Fatalf("Shouldn't support DSN")
|
|
}
|
|
if err := c.Quit(); err != nil {
|
|
t.Fatalf("QUIT failed: %s", err)
|
|
}
|
|
|
|
bcmdbuf.Flush()
|
|
actualcmds := cmdbuf.String()
|
|
if client != actualcmds {
|
|
t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
|
|
}
|
|
}
|
|
|
|
var newClient2Server = `220 hello world
|
|
502 EH?
|
|
250-mx.google.com at your service
|
|
250-SIZE 35651584
|
|
250-AUTH LOGIN PLAIN
|
|
250 8BITMIME
|
|
221 OK
|
|
`
|
|
|
|
var newClient2Client = `EHLO localhost
|
|
HELO localhost
|
|
QUIT
|
|
`
|
|
|
|
func TestNewClientWithTLS(t *testing.T) {
|
|
cert, err := tls.X509KeyPair(localhostCert, localhostKey)
|
|
if err != nil {
|
|
t.Fatalf("loadcert: %v", err)
|
|
}
|
|
|
|
config := tls.Config{Certificates: []tls.Certificate{cert}}
|
|
|
|
ln, err := tls.Listen("tcp", "127.0.0.1:0", &config)
|
|
if err != nil {
|
|
ln, err = tls.Listen("tcp", "[::1]:0", &config)
|
|
if err != nil {
|
|
t.Fatalf("server: listen: %v", err)
|
|
}
|
|
}
|
|
|
|
go func() {
|
|
conn, err := ln.Accept()
|
|
if err != nil {
|
|
t.Errorf("server: accept: %v", err)
|
|
return
|
|
}
|
|
defer conn.Close()
|
|
|
|
_, err = conn.Write([]byte("220 SIGNS\r\n"))
|
|
if err != nil {
|
|
t.Errorf("server: write: %v", err)
|
|
return
|
|
}
|
|
}()
|
|
|
|
config.InsecureSkipVerify = true
|
|
conn, err := tls.Dial("tcp", ln.Addr().String(), &config)
|
|
if err != nil {
|
|
t.Fatalf("client: dial: %v", err)
|
|
}
|
|
defer conn.Close()
|
|
|
|
client, err := NewClient(conn, ln.Addr().String())
|
|
if err != nil {
|
|
t.Fatalf("smtp: newclient: %v", err)
|
|
}
|
|
if !client.tls {
|
|
t.Errorf("client.tls Got: %t Expected: %t", client.tls, true)
|
|
}
|
|
}
|
|
|
|
func TestHello(t *testing.T) {
|
|
|
|
if len(helloServer) != len(helloClient) {
|
|
t.Fatalf("Hello server and client size mismatch")
|
|
}
|
|
|
|
for i := 0; i < len(helloServer); i++ {
|
|
server := strings.Join(strings.Split(baseHelloServer+helloServer[i], "\n"), "\r\n")
|
|
client := strings.Join(strings.Split(baseHelloClient+helloClient[i], "\n"), "\r\n")
|
|
var cmdbuf bytes.Buffer
|
|
bcmdbuf := bufio.NewWriter(&cmdbuf)
|
|
var fake faker
|
|
fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
|
|
c, err := NewClient(fake, "fake.host")
|
|
if err != nil {
|
|
t.Fatalf("NewClient: %v", err)
|
|
}
|
|
defer c.Close()
|
|
c.localName = "customhost"
|
|
err = nil
|
|
|
|
switch i {
|
|
case 0:
|
|
err = c.Hello("hostinjection>\n\rDATA\r\nInjected message body\r\n.\r\nQUIT\r\n")
|
|
if err == nil {
|
|
t.Errorf("Expected Hello to be rejected due to a message injection attempt")
|
|
}
|
|
err = c.Hello("customhost")
|
|
case 1:
|
|
err = c.StartTLS(nil)
|
|
if err.Error() == "502 Not implemented" {
|
|
err = nil
|
|
}
|
|
case 2:
|
|
err = c.Verify("test@example.com")
|
|
case 3:
|
|
c.tls = true
|
|
c.serverName = "smtp.google.com"
|
|
err = c.Auth(PlainAuth("", "user", "pass", "smtp.google.com"))
|
|
case 4:
|
|
err = c.Mail("test@example.com")
|
|
case 5:
|
|
ok, _ := c.Extension("feature")
|
|
if ok {
|
|
t.Errorf("Expected FEATURE not to be supported")
|
|
}
|
|
case 6:
|
|
err = c.Reset()
|
|
case 7:
|
|
err = c.Quit()
|
|
case 8:
|
|
err = c.Verify("test@example.com")
|
|
if err != nil {
|
|
err = c.Hello("customhost")
|
|
if err != nil {
|
|
t.Errorf("Want error, got none")
|
|
}
|
|
}
|
|
case 9:
|
|
err = c.Noop()
|
|
default:
|
|
t.Fatalf("Unhandled command")
|
|
}
|
|
|
|
if err != nil {
|
|
t.Errorf("Command %d failed: %v", i, err)
|
|
}
|
|
|
|
bcmdbuf.Flush()
|
|
actualcmds := cmdbuf.String()
|
|
if client != actualcmds {
|
|
t.Errorf("Got:\n%s\nExpected:\n%s", actualcmds, client)
|
|
}
|
|
}
|
|
}
|
|
|
|
var baseHelloServer = `220 hello world
|
|
502 EH?
|
|
250-mx.google.com at your service
|
|
250 FEATURE
|
|
`
|
|
|
|
var helloServer = []string{
|
|
"",
|
|
"502 Not implemented\n",
|
|
"250 User is valid\n",
|
|
"235 Accepted\n",
|
|
"250 Sender ok\n",
|
|
"",
|
|
"250 Reset ok\n",
|
|
"221 Goodbye\n",
|
|
"250 Sender ok\n",
|
|
"250 ok\n",
|
|
}
|
|
|
|
var baseHelloClient = `EHLO customhost
|
|
HELO customhost
|
|
`
|
|
|
|
var helloClient = []string{
|
|
"",
|
|
"STARTTLS\n",
|
|
"VRFY test@example.com\n",
|
|
"AUTH PLAIN AHVzZXIAcGFzcw==\n",
|
|
"MAIL FROM:<test@example.com>\n",
|
|
"",
|
|
"RSET\n",
|
|
"QUIT\n",
|
|
"VRFY test@example.com\n",
|
|
"NOOP\n",
|
|
}
|
|
|
|
func TestSendMail(t *testing.T) {
|
|
server := strings.Join(strings.Split(sendMailServer, "\n"), "\r\n")
|
|
client := strings.Join(strings.Split(sendMailClient, "\n"), "\r\n")
|
|
var cmdbuf bytes.Buffer
|
|
bcmdbuf := bufio.NewWriter(&cmdbuf)
|
|
l, err := net.Listen("tcp", "127.0.0.1:0")
|
|
if err != nil {
|
|
t.Fatalf("Unable to create listener: %v", err)
|
|
}
|
|
defer l.Close()
|
|
|
|
// prevent data race on bcmdbuf
|
|
var done = make(chan struct{})
|
|
go func(data []string) {
|
|
|
|
defer close(done)
|
|
|
|
conn, err := l.Accept()
|
|
if err != nil {
|
|
t.Errorf("Accept error: %v", err)
|
|
return
|
|
}
|
|
defer conn.Close()
|
|
|
|
tc := textproto.NewConn(conn)
|
|
for i := 0; i < len(data) && data[i] != ""; i++ {
|
|
tc.PrintfLine(data[i])
|
|
for len(data[i]) >= 4 && data[i][3] == '-' {
|
|
i++
|
|
tc.PrintfLine(data[i])
|
|
}
|
|
if data[i] == "221 Goodbye" {
|
|
return
|
|
}
|
|
read := false
|
|
for !read || data[i] == "354 Go ahead" {
|
|
msg, err := tc.ReadLine()
|
|
bcmdbuf.Write([]byte(msg + "\r\n"))
|
|
read = true
|
|
if err != nil {
|
|
t.Errorf("Read error: %v", err)
|
|
return
|
|
}
|
|
if data[i] == "354 Go ahead" && msg == "." {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}(strings.Split(server, "\r\n"))
|
|
|
|
err = SendMail(l.Addr().String(), nil, "test@example.com", []string{"other@example.com>\n\rDATA\r\nInjected message body\r\n.\r\nQUIT\r\n"}, []byte(strings.Replace(`From: test@example.com
|
|
To: other@example.com
|
|
Subject: SendMail test
|
|
|
|
SendMail is working for me.
|
|
`, "\n", "\r\n", -1)))
|
|
if err == nil {
|
|
t.Errorf("Expected SendMail to be rejected due to a message injection attempt")
|
|
}
|
|
|
|
err = SendMail(l.Addr().String(), nil, "test@example.com", []string{"other@example.com"}, []byte(strings.Replace(`From: test@example.com
|
|
To: other@example.com
|
|
Subject: SendMail test
|
|
|
|
SendMail is working for me.
|
|
`, "\n", "\r\n", -1)))
|
|
|
|
if err != nil {
|
|
t.Errorf("%v", err)
|
|
}
|
|
|
|
<-done
|
|
bcmdbuf.Flush()
|
|
actualcmds := cmdbuf.String()
|
|
if client != actualcmds {
|
|
t.Errorf("Got:\n%s\nExpected:\n%s", actualcmds, client)
|
|
}
|
|
}
|
|
|
|
var sendMailServer = `220 hello world
|
|
502 EH?
|
|
250 mx.google.com at your service
|
|
250 Sender ok
|
|
250 Receiver ok
|
|
354 Go ahead
|
|
250 Data ok
|
|
221 Goodbye
|
|
`
|
|
|
|
var sendMailClient = `EHLO localhost
|
|
HELO localhost
|
|
MAIL FROM:<test@example.com>
|
|
RCPT TO:<other@example.com>
|
|
DATA
|
|
From: test@example.com
|
|
To: other@example.com
|
|
Subject: SendMail test
|
|
|
|
SendMail is working for me.
|
|
.
|
|
QUIT
|
|
`
|
|
|
|
func TestSendMailWithAuth(t *testing.T) {
|
|
l, err := net.Listen("tcp", "127.0.0.1:0")
|
|
if err != nil {
|
|
t.Fatalf("Unable to create listener: %v", err)
|
|
}
|
|
defer l.Close()
|
|
|
|
errCh := make(chan error)
|
|
go func() {
|
|
defer close(errCh)
|
|
conn, err := l.Accept()
|
|
if err != nil {
|
|
errCh <- fmt.Errorf("Accept: %v", err)
|
|
return
|
|
}
|
|
defer conn.Close()
|
|
|
|
tc := textproto.NewConn(conn)
|
|
tc.PrintfLine("220 hello world")
|
|
msg, err := tc.ReadLine()
|
|
if err != nil {
|
|
errCh <- fmt.Errorf("ReadLine error: %v", err)
|
|
return
|
|
}
|
|
const wantMsg = "EHLO localhost"
|
|
if msg != wantMsg {
|
|
errCh <- fmt.Errorf("unexpected response %q; want %q", msg, wantMsg)
|
|
return
|
|
}
|
|
err = tc.PrintfLine("250 mx.google.com at your service")
|
|
if err != nil {
|
|
errCh <- fmt.Errorf("PrintfLine: %v", err)
|
|
return
|
|
}
|
|
}()
|
|
|
|
err = SendMail(l.Addr().String(), PlainAuth("", "user", "pass", "smtp.google.com"), "test@example.com", []string{"other@example.com"}, []byte(strings.Replace(`From: test@example.com
|
|
To: other@example.com
|
|
Subject: SendMail test
|
|
|
|
SendMail is working for me.
|
|
`, "\n", "\r\n", -1)))
|
|
if err == nil {
|
|
t.Error("SendMail: Server doesn't support AUTH, expected to get an error, but got none ")
|
|
}
|
|
if err.Error() != "smtp: server doesn't support AUTH" {
|
|
t.Errorf("Expected: smtp: server doesn't support AUTH, got: %s", err)
|
|
}
|
|
err = <-errCh
|
|
if err != nil {
|
|
t.Fatalf("server error: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestAuthFailed(t *testing.T) {
|
|
server := strings.Join(strings.Split(authFailedServer, "\n"), "\r\n")
|
|
client := strings.Join(strings.Split(authFailedClient, "\n"), "\r\n")
|
|
var cmdbuf bytes.Buffer
|
|
bcmdbuf := bufio.NewWriter(&cmdbuf)
|
|
var fake faker
|
|
fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
|
|
c, err := NewClient(fake, "fake.host")
|
|
if err != nil {
|
|
t.Fatalf("NewClient: %v", err)
|
|
}
|
|
defer c.Close()
|
|
|
|
c.tls = true
|
|
c.serverName = "smtp.google.com"
|
|
err = c.Auth(PlainAuth("", "user", "pass", "smtp.google.com"))
|
|
|
|
if err == nil {
|
|
t.Error("Auth: expected error; got none")
|
|
} else if err.Error() != "535 Invalid credentials\nplease see www.example.com" {
|
|
t.Errorf("Auth: got error: %v, want: %s", err, "535 Invalid credentials\nplease see www.example.com")
|
|
}
|
|
|
|
bcmdbuf.Flush()
|
|
actualcmds := cmdbuf.String()
|
|
if client != actualcmds {
|
|
t.Errorf("Got:\n%s\nExpected:\n%s", actualcmds, client)
|
|
}
|
|
}
|
|
|
|
var authFailedServer = `220 hello world
|
|
250-mx.google.com at your service
|
|
250 AUTH LOGIN PLAIN
|
|
535-Invalid credentials
|
|
535 please see www.example.com
|
|
221 Goodbye
|
|
`
|
|
|
|
var authFailedClient = `EHLO localhost
|
|
AUTH PLAIN AHVzZXIAcGFzcw==
|
|
*
|
|
QUIT
|
|
`
|
|
|
|
func TestTLSClient(t *testing.T) {
|
|
if runtime.GOOS == "freebsd" || runtime.GOOS == "js" {
|
|
testenv.SkipFlaky(t, 19229)
|
|
}
|
|
ln := newLocalListener(t)
|
|
defer ln.Close()
|
|
errc := make(chan error)
|
|
go func() {
|
|
errc <- sendMail(ln.Addr().String())
|
|
}()
|
|
conn, err := ln.Accept()
|
|
if err != nil {
|
|
t.Fatalf("failed to accept connection: %v", err)
|
|
}
|
|
defer conn.Close()
|
|
if err := serverHandle(conn, t); err != nil {
|
|
t.Fatalf("failed to handle connection: %v", err)
|
|
}
|
|
if err := <-errc; err != nil {
|
|
t.Fatalf("client error: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestTLSConnState(t *testing.T) {
|
|
ln := newLocalListener(t)
|
|
defer ln.Close()
|
|
clientDone := make(chan bool)
|
|
serverDone := make(chan bool)
|
|
go func() {
|
|
defer close(serverDone)
|
|
c, err := ln.Accept()
|
|
if err != nil {
|
|
t.Errorf("Server accept: %v", err)
|
|
return
|
|
}
|
|
defer c.Close()
|
|
if err := serverHandle(c, t); err != nil {
|
|
t.Errorf("server error: %v", err)
|
|
}
|
|
}()
|
|
go func() {
|
|
defer close(clientDone)
|
|
c, err := Dial(ln.Addr().String())
|
|
if err != nil {
|
|
t.Errorf("Client dial: %v", err)
|
|
return
|
|
}
|
|
defer c.Quit()
|
|
cfg := &tls.Config{ServerName: "example.com"}
|
|
testHookStartTLS(cfg) // set the RootCAs
|
|
if err := c.StartTLS(cfg); err != nil {
|
|
t.Errorf("StartTLS: %v", err)
|
|
return
|
|
}
|
|
cs, ok := c.TLSConnectionState()
|
|
if !ok {
|
|
t.Errorf("TLSConnectionState returned ok == false; want true")
|
|
return
|
|
}
|
|
if cs.Version == 0 || !cs.HandshakeComplete {
|
|
t.Errorf("ConnectionState = %#v; expect non-zero Version and HandshakeComplete", cs)
|
|
}
|
|
}()
|
|
<-clientDone
|
|
<-serverDone
|
|
}
|
|
|
|
func newLocalListener(t *testing.T) net.Listener {
|
|
ln, err := net.Listen("tcp", "127.0.0.1:0")
|
|
if err != nil {
|
|
ln, err = net.Listen("tcp6", "[::1]:0")
|
|
}
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return ln
|
|
}
|
|
|
|
type smtpSender struct {
|
|
w io.Writer
|
|
}
|
|
|
|
func (s smtpSender) send(f string) {
|
|
s.w.Write([]byte(f + "\r\n"))
|
|
}
|
|
|
|
// smtp server, finely tailored to deal with our own client only!
|
|
func serverHandle(c net.Conn, t *testing.T) error {
|
|
send := smtpSender{c}.send
|
|
send("220 127.0.0.1 ESMTP service ready")
|
|
s := bufio.NewScanner(c)
|
|
for s.Scan() {
|
|
switch s.Text() {
|
|
case "EHLO localhost":
|
|
send("250-127.0.0.1 ESMTP offers a warm hug of welcome")
|
|
send("250-STARTTLS")
|
|
send("250 Ok")
|
|
case "STARTTLS":
|
|
send("220 Go ahead")
|
|
keypair, err := tls.X509KeyPair(localhostCert, localhostKey)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
config := &tls.Config{Certificates: []tls.Certificate{keypair}}
|
|
c = tls.Server(c, config)
|
|
defer c.Close()
|
|
return serverHandleTLS(c, t)
|
|
default:
|
|
t.Fatalf("unrecognized command: %q", s.Text())
|
|
}
|
|
}
|
|
return s.Err()
|
|
}
|
|
|
|
func serverHandleTLS(c net.Conn, t *testing.T) error {
|
|
send := smtpSender{c}.send
|
|
s := bufio.NewScanner(c)
|
|
for s.Scan() {
|
|
switch s.Text() {
|
|
case "EHLO localhost":
|
|
send("250 Ok")
|
|
case "MAIL FROM:<joe1@example.com>":
|
|
send("250 Ok")
|
|
case "RCPT TO:<joe2@example.com>":
|
|
send("250 Ok")
|
|
case "DATA":
|
|
send("354 send the mail data, end with .")
|
|
send("250 Ok")
|
|
case "Subject: test":
|
|
case "":
|
|
case "howdy!":
|
|
case ".":
|
|
case "QUIT":
|
|
send("221 127.0.0.1 Service closing transmission channel")
|
|
return nil
|
|
default:
|
|
t.Fatalf("unrecognized command during TLS: %q", s.Text())
|
|
}
|
|
}
|
|
return s.Err()
|
|
}
|
|
|
|
func init() {
|
|
testRootCAs := x509.NewCertPool()
|
|
testRootCAs.AppendCertsFromPEM(localhostCert)
|
|
testHookStartTLS = func(config *tls.Config) {
|
|
config.RootCAs = testRootCAs
|
|
}
|
|
}
|
|
|
|
func sendMail(hostPort string) error {
|
|
from := "joe1@example.com"
|
|
to := []string{"joe2@example.com"}
|
|
return SendMail(hostPort, nil, from, to, []byte("Subject: test\n\nhowdy!"))
|
|
}
|
|
|
|
// localhostCert is a PEM-encoded TLS cert generated from src/crypto/tls:
|
|
// go run generate_cert.go --rsa-bits 1024 --host 127.0.0.1,::1,example.com \
|
|
// --ca --start-date "Jan 1 00:00:00 1970" --duration=1000000h
|
|
var localhostCert = []byte(`
|
|
-----BEGIN CERTIFICATE-----
|
|
MIICFDCCAX2gAwIBAgIRAK0xjnaPuNDSreeXb+z+0u4wDQYJKoZIhvcNAQELBQAw
|
|
EjEQMA4GA1UEChMHQWNtZSBDbzAgFw03MDAxMDEwMDAwMDBaGA8yMDg0MDEyOTE2
|
|
MDAwMFowEjEQMA4GA1UEChMHQWNtZSBDbzCBnzANBgkqhkiG9w0BAQEFAAOBjQAw
|
|
gYkCgYEA0nFbQQuOWsjbGtejcpWz153OlziZM4bVjJ9jYruNw5n2Ry6uYQAffhqa
|
|
JOInCmmcVe2siJglsyH9aRh6vKiobBbIUXXUU1ABd56ebAzlt0LobLlx7pZEMy30
|
|
LqIi9E6zmL3YvdGzpYlkFRnRrqwEtWYbGBf3znO250S56CCWH2UCAwEAAaNoMGYw
|
|
DgYDVR0PAQH/BAQDAgKkMBMGA1UdJQQMMAoGCCsGAQUFBwMBMA8GA1UdEwEB/wQF
|
|
MAMBAf8wLgYDVR0RBCcwJYILZXhhbXBsZS5jb22HBH8AAAGHEAAAAAAAAAAAAAAA
|
|
AAAAAAEwDQYJKoZIhvcNAQELBQADgYEAbZtDS2dVuBYvb+MnolWnCNqvw1w5Gtgi
|
|
NmvQQPOMgM3m+oQSCPRTNGSg25e1Qbo7bgQDv8ZTnq8FgOJ/rbkyERw2JckkHpD4
|
|
n4qcK27WkEDBtQFlPihIM8hLIuzWoi/9wygiElTy/tVL3y7fGCvY2/k1KBthtZGF
|
|
tN8URjVmyEo=
|
|
-----END CERTIFICATE-----`)
|
|
|
|
// localhostKey is the private key for localhostCert.
|
|
var localhostKey = []byte(testingKey(`
|
|
-----BEGIN RSA TESTING KEY-----
|
|
MIICXgIBAAKBgQDScVtBC45ayNsa16NylbPXnc6XOJkzhtWMn2Niu43DmfZHLq5h
|
|
AB9+Gpok4icKaZxV7ayImCWzIf1pGHq8qKhsFshRddRTUAF3np5sDOW3QuhsuXHu
|
|
lkQzLfQuoiL0TrOYvdi90bOliWQVGdGurAS1ZhsYF/fOc7bnRLnoIJYfZQIDAQAB
|
|
AoGBAMst7OgpKyFV6c3JwyI/jWqxDySL3caU+RuTTBaodKAUx2ZEmNJIlx9eudLA
|
|
kucHvoxsM/eRxlxkhdFxdBcwU6J+zqooTnhu/FE3jhrT1lPrbhfGhyKnUrB0KKMM
|
|
VY3IQZyiehpxaeXAwoAou6TbWoTpl9t8ImAqAMY8hlULCUqlAkEA+9+Ry5FSYK/m
|
|
542LujIcCaIGoG1/Te6Sxr3hsPagKC2rH20rDLqXwEedSFOpSS0vpzlPAzy/6Rbb
|
|
PHTJUhNdwwJBANXkA+TkMdbJI5do9/mn//U0LfrCR9NkcoYohxfKz8JuhgRQxzF2
|
|
6jpo3q7CdTuuRixLWVfeJzcrAyNrVcBq87cCQFkTCtOMNC7fZnCTPUv+9q1tcJyB
|
|
vNjJu3yvoEZeIeuzouX9TJE21/33FaeDdsXbRhQEj23cqR38qFHsF1qAYNMCQQDP
|
|
QXLEiJoClkR2orAmqjPLVhR3t2oB3INcnEjLNSq8LHyQEfXyaFfu4U9l5+fRPL2i
|
|
jiC0k/9L5dHUsF0XZothAkEA23ddgRs+Id/HxtojqqUT27B8MT/IGNrYsp4DvS/c
|
|
qgkeluku4GjxRlDMBuXk94xOBEinUs+p/hwP1Alll80Tpg==
|
|
-----END RSA TESTING KEY-----`))
|
|
|
|
func testingKey(s string) string { return strings.ReplaceAll(s, "TESTING KEY", "PRIVATE KEY") }
|