mirror of
https://github.com/wneessen/go-mail.git
synced 2024-11-15 02:12:55 +01:00
Add SCRAM-SHA authentication tests for SMTP
Introduce new unit tests to verify SCRAM-SHA-1 and SCRAM-SHA-256 authentication for the SMTP client. These tests cover both successful and failing authentication cases, and include a mock SMTP server to facilitate testing.
This commit is contained in:
parent
a8e89a1258
commit
03062c5183
GPG key ID:
385AC9889632126E
1 changed files with 288 additions and 0 deletions
|
|
@ -18,6 +18,7 @@ import (
|
|||
"bytes"
|
||||
"crypto/tls"
|
||||
"crypto/x509"
|
||||
"encoding/base64"
|
||||
"flag"
|
||||
"fmt"
|
||||
"io"
|
||||
|
|
@ -368,6 +369,106 @@ func TestXOAuth2Error(t *testing.T) {
|
|||
}
|
||||
}
|
||||
|
||||
func TestAuthSCRAMSHA1_OK(t *testing.T) {
|
||||
hostname := "127.0.0.1"
|
||||
port := "2585"
|
||||
|
||||
go func() {
|
||||
startSMTPServer(false, hostname, port)
|
||||
}()
|
||||
time.Sleep(time.Millisecond * 500)
|
||||
|
||||
conn, err := net.Dial("tcp", fmt.Sprintf("%s:%s", hostname, port))
|
||||
if err != nil {
|
||||
t.Errorf("failed to dial server: %v", err)
|
||||
}
|
||||
client, err := NewClient(conn, hostname)
|
||||
if err != nil {
|
||||
t.Errorf("failed to create client: %v", err)
|
||||
}
|
||||
if err = client.Hello(hostname); err != nil {
|
||||
t.Errorf("failed to send HELO: %v", err)
|
||||
}
|
||||
if err = client.Auth(ScramSHA1Auth("username", "password")); err != nil {
|
||||
t.Errorf("failed to authenticate: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestAuthSCRAMSHA256_OK(t *testing.T) {
|
||||
hostname := "127.0.0.1"
|
||||
port := "2586"
|
||||
|
||||
go func() {
|
||||
startSMTPServer(false, hostname, port)
|
||||
}()
|
||||
time.Sleep(time.Millisecond * 500)
|
||||
|
||||
conn, err := net.Dial("tcp", fmt.Sprintf("%s:%s", hostname, port))
|
||||
if err != nil {
|
||||
t.Errorf("failed to dial server: %v", err)
|
||||
}
|
||||
client, err := NewClient(conn, hostname)
|
||||
if err != nil {
|
||||
t.Errorf("failed to create client: %v", err)
|
||||
}
|
||||
if err = client.Hello(hostname); err != nil {
|
||||
t.Errorf("failed to send HELO: %v", err)
|
||||
}
|
||||
if err = client.Auth(ScramSHA256Auth("username", "password")); err != nil {
|
||||
t.Errorf("failed to authenticate: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestAuthSCRAMSHA1_fail(t *testing.T) {
|
||||
hostname := "127.0.0.1"
|
||||
port := "2587"
|
||||
|
||||
go func() {
|
||||
startSMTPServer(true, hostname, port)
|
||||
}()
|
||||
time.Sleep(time.Millisecond * 500)
|
||||
|
||||
conn, err := net.Dial("tcp", fmt.Sprintf("%s:%s", hostname, port))
|
||||
if err != nil {
|
||||
t.Errorf("failed to dial server: %v", err)
|
||||
}
|
||||
client, err := NewClient(conn, hostname)
|
||||
if err != nil {
|
||||
t.Errorf("failed to create client: %v", err)
|
||||
}
|
||||
if err = client.Hello(hostname); err != nil {
|
||||
t.Errorf("failed to send HELO: %v", err)
|
||||
}
|
||||
if err = client.Auth(ScramSHA1Auth("username", "password")); err == nil {
|
||||
t.Errorf("expected auth error, got nil")
|
||||
}
|
||||
}
|
||||
|
||||
func TestAuthSCRAMSHA256_fail(t *testing.T) {
|
||||
hostname := "127.0.0.1"
|
||||
port := "2588"
|
||||
|
||||
go func() {
|
||||
startSMTPServer(true, hostname, port)
|
||||
}()
|
||||
time.Sleep(time.Millisecond * 500)
|
||||
|
||||
conn, err := net.Dial("tcp", fmt.Sprintf("%s:%s", hostname, port))
|
||||
if err != nil {
|
||||
t.Errorf("failed to dial server: %v", err)
|
||||
}
|
||||
client, err := NewClient(conn, hostname)
|
||||
if err != nil {
|
||||
t.Errorf("failed to create client: %v", err)
|
||||
}
|
||||
if err = client.Hello(hostname); err != nil {
|
||||
t.Errorf("failed to send HELO: %v", err)
|
||||
}
|
||||
if err = client.Auth(ScramSHA256Auth("username", "password")); err == nil {
|
||||
t.Errorf("expected auth error, got nil")
|
||||
}
|
||||
}
|
||||
|
||||
// Issue 17794: don't send a trailing space on AUTH command when there's no password.
|
||||
func TestClientAuthTrimSpace(t *testing.T) {
|
||||
server := "220 hello world\r\n" +
|
||||
|
|
@ -1541,3 +1642,190 @@ func SkipFlaky(t testing.TB, issue int) {
|
|||
t.Skipf("skipping known flaky test without the -flaky flag; see golang.org/issue/%d", issue)
|
||||
}
|
||||
}
|
||||
|
||||
// testSCRAMSMTPServer represents a test server for SCRAM-based SMTP authentication.
|
||||
// It does not do any acutal computation of the challanges but verifies that the expected
|
||||
// fields are present. We have actual real authentication tests for all SCRAM modes in the
|
||||
// go-mail client_test.go
|
||||
type testSCRAMSMTPServer struct {
|
||||
authMechanism string
|
||||
nonce string
|
||||
hostname string
|
||||
port string
|
||||
shouldFail bool
|
||||
}
|
||||
|
||||
func (s *testSCRAMSMTPServer) handleConnection(conn net.Conn) {
|
||||
defer func() {
|
||||
_ = conn.Close()
|
||||
}()
|
||||
|
||||
reader := bufio.NewReader(conn)
|
||||
writer := bufio.NewWriter(conn)
|
||||
writeLine := func(data string) error {
|
||||
_, err := writer.WriteString(data + "\r\n")
|
||||
if err != nil {
|
||||
return fmt.Errorf("unable to write line: %w", err)
|
||||
}
|
||||
return writer.Flush()
|
||||
}
|
||||
writeOK := func() {
|
||||
_ = writeLine("250 2.0.0 OK")
|
||||
}
|
||||
|
||||
if err := writeLine("220 go-mail test server ready ESMTP"); err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
data, err := reader.ReadString('\n')
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
data = strings.TrimSpace(data)
|
||||
if strings.HasPrefix(data, "EHLO") {
|
||||
_ = writeLine(fmt.Sprintf("250-%s", s.hostname))
|
||||
_ = writeLine("250-AUTH SCRAM-SHA-1 SCRAM-SHA-256")
|
||||
writeOK()
|
||||
} else {
|
||||
_ = writeLine("500 Invalid command")
|
||||
return
|
||||
}
|
||||
|
||||
for {
|
||||
data, err = reader.ReadString('\n')
|
||||
if err != nil {
|
||||
fmt.Printf("failed to read data: %v", err)
|
||||
}
|
||||
data = strings.TrimSpace(data)
|
||||
if strings.HasPrefix(data, "AUTH") {
|
||||
parts := strings.Split(data, " ")
|
||||
if len(parts) < 2 {
|
||||
_ = writeLine("500 Syntax error")
|
||||
return
|
||||
}
|
||||
|
||||
authMechanism := parts[1]
|
||||
if authMechanism != "SCRAM-SHA-1" && authMechanism != "SCRAM-SHA-256" {
|
||||
_ = writeLine("504 Unrecognized authentication mechanism")
|
||||
return
|
||||
}
|
||||
s.authMechanism = authMechanism
|
||||
_ = writeLine("334 ")
|
||||
s.handleSCRAMAuth(conn)
|
||||
return
|
||||
} else {
|
||||
_ = writeLine("500 Invalid command")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *testSCRAMSMTPServer) handleSCRAMAuth(conn net.Conn) {
|
||||
reader := bufio.NewReader(conn)
|
||||
writer := bufio.NewWriter(conn)
|
||||
writeLine := func(data string) error {
|
||||
_, err := writer.WriteString(data + "\r\n")
|
||||
if err != nil {
|
||||
return fmt.Errorf("unable to write line: %w", err)
|
||||
}
|
||||
return writer.Flush()
|
||||
}
|
||||
|
||||
data, err := reader.ReadString('\n')
|
||||
clientMessage := strings.TrimSpace(data)
|
||||
decodedMessage, err := base64.StdEncoding.DecodeString(clientMessage)
|
||||
if err != nil {
|
||||
_ = writeLine("535 Authentication failed")
|
||||
return
|
||||
}
|
||||
splits := strings.Split(string(decodedMessage), ",")
|
||||
if len(splits) != 4 {
|
||||
_ = writeLine("535 Authentication failed - expected 4 parts")
|
||||
return
|
||||
}
|
||||
if splits[0] != "n" {
|
||||
_ = writeLine("535 Authentication failed - expected n to be in the first part")
|
||||
return
|
||||
}
|
||||
if splits[2] != "n=username" {
|
||||
_ = writeLine("535 Authentication failed - expected n=username to be in the third part")
|
||||
return
|
||||
}
|
||||
if !strings.HasPrefix(splits[3], "r=") {
|
||||
_ = writeLine("535 Authentication failed - expected r= to be in the fourth part")
|
||||
return
|
||||
}
|
||||
clientNonce := s.extractNonce(string(decodedMessage))
|
||||
if clientNonce == "" {
|
||||
_ = writeLine("535 Authentication failed")
|
||||
return
|
||||
}
|
||||
|
||||
s.nonce = clientNonce + "server_nonce"
|
||||
serverFirstMessage := fmt.Sprintf("r=%s,s=%s,i=0", s.nonce, "salt")
|
||||
_ = writeLine(fmt.Sprintf("334 %s", base64.StdEncoding.EncodeToString([]byte(serverFirstMessage))))
|
||||
|
||||
data, err = reader.ReadString('\n')
|
||||
clientFinalMessage := strings.TrimSpace(data)
|
||||
decodedFinalMessage, err := base64.StdEncoding.DecodeString(clientFinalMessage)
|
||||
if err != nil {
|
||||
_ = writeLine("535 Authentication failed")
|
||||
return
|
||||
}
|
||||
splits = strings.Split(string(decodedFinalMessage), ",")
|
||||
if splits[0] != "c=biws" {
|
||||
_ = writeLine("535 Authentication failed - expected c=biws to be in the first part")
|
||||
return
|
||||
}
|
||||
if !strings.HasPrefix(splits[1], "r=") {
|
||||
_ = writeLine("535 Authentication failed - expected r to be in the second part")
|
||||
return
|
||||
}
|
||||
if !strings.Contains(splits[1], "server_nonce") {
|
||||
_ = writeLine("535 Authentication failed - expected server_nonce to be in the second part")
|
||||
return
|
||||
}
|
||||
if !strings.HasPrefix(splits[2], "p=") {
|
||||
_ = writeLine("535 Authentication failed - expected p to be in the third part")
|
||||
return
|
||||
}
|
||||
|
||||
if s.shouldFail {
|
||||
_ = writeLine("535 Authentication failed")
|
||||
return
|
||||
}
|
||||
_ = writeLine("235 Authentication successful")
|
||||
return
|
||||
}
|
||||
|
||||
func (s *testSCRAMSMTPServer) extractNonce(message string) string {
|
||||
parts := strings.Split(message, ",")
|
||||
for _, part := range parts {
|
||||
if strings.HasPrefix(part, "r=") {
|
||||
return part[2:]
|
||||
}
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
func startSMTPServer(shouldFail bool, hostname, port string) {
|
||||
server := &testSCRAMSMTPServer{
|
||||
hostname: hostname,
|
||||
port: port,
|
||||
shouldFail: shouldFail,
|
||||
}
|
||||
listener, err := net.Listen("tcp", fmt.Sprintf("%s:%s", hostname, port))
|
||||
if err != nil {
|
||||
fmt.Printf("Failed to start SMTP server: %v", err)
|
||||
}
|
||||
defer func() {
|
||||
_ = listener.Close()
|
||||
}()
|
||||
for {
|
||||
conn, err := listener.Accept()
|
||||
if err != nil {
|
||||
fmt.Printf("Failed to accept connection: %v", err)
|
||||
continue
|
||||
}
|
||||
go server.handleConnection(conn)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue