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Handle read errors in SMTP authentication flow

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Add checks to handle errors when reading client messages. This ensures that an appropriate error message is sent back to the client if reading fails, improving the robustness of the SMTP authentication process.
This commit is contained in:
Winni Neessen 2024-10-03 12:38:39 +02:00
parent 03062c5183
commit 4c8c0d855e
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 12 additions and 5 deletions
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17
smtp/smtp_test.go
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@ -1731,8 +1731,12 @@ func (s *testSCRAMSMTPServer) handleSCRAMAuth(conn net.Conn) {
}
data, err := reader.ReadString('\n')
clientMessage := strings.TrimSpace(data)
decodedMessage, err := base64.StdEncoding.DecodeString(clientMessage)
if err != nil {
_ = writeLine("535 Authentication failed")
return
}
data = strings.TrimSpace(data)
decodedMessage, err := base64.StdEncoding.DecodeString(data)
if err != nil {
_ = writeLine("535 Authentication failed")
return
@ -1765,8 +1769,12 @@ func (s *testSCRAMSMTPServer) handleSCRAMAuth(conn net.Conn) {
_ = 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
}
data = strings.TrimSpace(data)
decodedFinalMessage, err := base64.StdEncoding.DecodeString(data)
if err != nil {
_ = writeLine("535 Authentication failed")
return
@ -1794,7 +1802,6 @@ func (s *testSCRAMSMTPServer) handleSCRAMAuth(conn net.Conn) {
return
}
_ = writeLine("235 Authentication successful")
return
}
func (s *testSCRAMSMTPServer) extractNonce(message string) string {