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|
package smtpclient
import (
"bufio"
"context"
"encoding/base64"
"net"
"strings"
"testing"
"time"
)
func TestSendUsesConfiguredEnvelopeFrom(t *testing.T) {
server, client := net.Pipe()
defer client.Close()
commands := make(chan string, 32)
done := make(chan struct{})
go func() {
defer close(done)
defer close(commands)
defer server.Close()
r := bufio.NewReader(server)
w := bufio.NewWriter(server)
_, _ = w.WriteString("220 test\r\n")
_ = w.Flush()
inData := false
for {
line, err := r.ReadString('\n')
if err != nil {
return
}
commands <- line
switch {
case inData && line != ".\r\n":
continue
case strings.HasPrefix(line, "EHLO "):
_, _ = w.WriteString("250 test\r\n")
case strings.HasPrefix(line, "MAIL FROM:"):
_, _ = w.WriteString("250 ok\r\n")
case strings.HasPrefix(line, "RCPT TO:"):
_, _ = w.WriteString("250 ok\r\n")
case strings.HasPrefix(line, "DATA"):
inData = true
_, _ = w.WriteString("354 go ahead\r\n")
case line == ".\r\n":
inData = false
_, _ = w.WriteString("250 queued\r\n")
case strings.HasPrefix(line, "QUIT"):
_, _ = w.WriteString("221 bye\r\n")
_ = w.Flush()
return
default:
continue
}
_ = w.Flush()
}
}()
mailer := New(Config{
Host: "mail2news.tcpreset.net",
Port: 25,
Recipient: "mail2news@mail2news.tcpreset.net",
EnvelopeFrom: "n2usenet@virebent.art",
HELO: "n2usenet.virebent.art",
RequireTLS: false,
Timeout: 5 * time.Second,
}, func(ctx context.Context, network, address string) (net.Conn, error) {
return client, nil
})
if err := mailer.Send(context.Background(), Message{
EnvelopeFrom: "user@example.invalid",
Raw: "From: User <user@example.invalid>\r\nTo: mail2news@mail2news.tcpreset.net\r\nSubject: Test\r\n\r\nhello",
}); err != nil {
t.Fatalf("Send returned error: %v", err)
}
var sawConfiguredFrom bool
for line := range commands {
if line == "MAIL FROM:<n2usenet@virebent.art>\r\n" {
sawConfiguredFrom = true
break
}
}
<-done
if !sawConfiguredFrom {
t.Fatal("configured envelope sender was not used")
}
}
func TestSessionAuthPlain(t *testing.T) {
server, client := net.Pipe()
defer client.Close()
command := make(chan string, 1)
go func() {
defer server.Close()
r := bufio.NewReader(server)
line, err := r.ReadString('\n')
if err != nil {
command <- ""
return
}
command <- line
_, _ = server.Write([]byte("235 2.7.0 authentication successful\r\n"))
}()
session := newSession(client)
if err := session.authPlain("n2usenet@virebent.art", "test-password"); err != nil {
t.Fatalf("authPlain returned error: %v", err)
}
line := <-command
const prefix = "AUTH PLAIN "
if !strings.HasPrefix(line, prefix) {
t.Fatalf("unexpected AUTH command: %q", line)
}
token := strings.TrimSpace(strings.TrimPrefix(line, prefix))
decoded, err := base64.StdEncoding.DecodeString(token)
if err != nil {
t.Fatalf("decode AUTH payload: %v", err)
}
if got, want := string(decoded), "\x00n2usenet@virebent.art\x00test-password"; got != want {
t.Fatalf("unexpected AUTH payload: got %q want %q", got, want)
}
}
func TestSessionAuthPlainRejectsNUL(t *testing.T) {
session := &session{}
if err := session.authPlain("n2usenet\x00admin", "test-password"); err == nil {
t.Fatal("authPlain accepted a username containing NUL")
}
if err := session.authPlain("n2usenet", "test\x00password"); err == nil {
t.Fatal("authPlain accepted a password containing NUL")
}
}
func TestCheckDoesNotStartMailTransaction(t *testing.T) {
server, client := net.Pipe()
defer client.Close()
commands := make(chan string, 8)
go func() {
defer close(commands)
defer server.Close()
r := bufio.NewReader(server)
w := bufio.NewWriter(server)
_, _ = w.WriteString("220 test\r\n")
_ = w.Flush()
for {
line, err := r.ReadString('\n')
if err != nil {
return
}
commands <- line
switch {
case strings.HasPrefix(line, "EHLO "):
_, _ = w.WriteString("250 test\r\n")
case strings.HasPrefix(line, "QUIT"):
_, _ = w.WriteString("221 bye\r\n")
_ = w.Flush()
return
default:
_, _ = w.WriteString("500 unexpected\r\n")
}
_ = w.Flush()
}
}()
mailer := New(Config{
Host: "mail.virebent.art",
Port: 25,
HELO: "n2usenet.virebent.art",
RequireTLS: false,
Timeout: 5 * time.Second,
}, func(context.Context, string, string) (net.Conn, error) {
return client, nil
})
if err := mailer.Check(context.Background()); err != nil {
t.Fatalf("Check returned error: %v", err)
}
for command := range commands {
if strings.HasPrefix(command, "MAIL ") || strings.HasPrefix(command, "RCPT ") || strings.HasPrefix(command, "DATA") {
t.Fatalf("health check started a mail transaction: %q", command)
}
}
}
|
