#1620 add allowed domains for SMTP auth

conf/locale/locale_en-US.ini

@@ -829,6 +829,8 @@ auths.ms_ad_sa = Ms Ad SA
 auths.smtp_auth = SMTP Authentication Type
 auths.smtphost = SMTP Host
 auths.smtpport = SMTP Port
+auths.allowed_domains = Allowed Domains
+auths.allowed_domains_helper = Leave it empty to not restrict any domains. Multiple domains should be separated by comma ','.
 auths.enable_tls = Enable TLS Encryption
 auths.skip_tls_verify = Skip TLS Verify
 auths.pam_service_name = PAM Service Name

models/login.go

@@ -70,6 +70,7 @@ type SMTPConfig struct {
 	Auth           string
 	Host           string
 	Port           int
+	AllowedDomains string `xorm:"TEXT"`
 	TLS            bool
 	SkipVerify     bool
 }
@@ -383,6 +384,16 @@ func SMTPAuth(a smtp.Auth, cfg *SMTPConfig) error {
 // Create a local user if success
 // Return the same LoginUserPlain semantic
 func LoginUserSMTPSource(u *User, name, passwd string, sourceId int64, cfg *SMTPConfig, autoRegister bool) (*User, error) {
+	// Verify allowed domains.
+	if len(cfg.AllowedDomains) > 0 {
+		idx := strings.Index(name, "@")
+		if idx == -1 {
+			return nil, ErrUserNotExist{0, name}
+		} else if !com.IsSliceContainsStr(strings.Split(cfg.AllowedDomains, ","), name[idx+1:]) {
+			return nil, ErrUserNotExist{0, name}
+		}
+	}
+
 	var auth smtp.Auth
 	if cfg.Auth == SMTP_PLAIN {
 		auth = smtp.PlainAuth("", name, passwd, cfg.Host)
@@ -394,7 +405,8 @@ func LoginUserSMTPSource(u *User, name, passwd string, sourceId int64, cfg *SMTP
 
 	if err := SMTPAuth(auth, cfg); err != nil {
 		if strings.Contains(err.Error(), "Username and Password not accepted") {
-			return nil, ErrUserNotExist{u.Id, u.Name}
+			fmt.Println(err)
+			return nil, ErrUserNotExist{0, name}
 		}
 		return nil, err
 	}

modules/auth/auth_form.go

@@ -28,6 +28,7 @@ type AuthenticationForm struct {
 	SMTPAuth          string
 	SMTPHost          string
 	SMTPPort          int
+	AllowedDomains    string
 	TLS               bool
 	SkipVerify        bool
 	AllowAutoRegister bool

routers/admin/auths.go

@@ -91,6 +91,7 @@ func parseSMTPConfig(form auth.AuthenticationForm) *models.SMTPConfig {
 		Auth:           form.SMTPAuth,
 		Host:           form.SMTPHost,
 		Port:           form.SMTPPort,
+		AllowedDomains: form.AllowedDomains,
 		TLS:            form.TLS,
 		SkipVerify:     form.SkipVerify,
 	}

templates/admin/auth/edit.tmpl

@@ -101,6 +101,11 @@
               <label for="smtp_port">{{.i18n.Tr "admin.auths.smtpport"}}</label>
               <input id="smtp_port" name="smtp_port" value="{{$cfg.Port}}" required>
             </div>
+            <div class="field">
+              <label for="allowed_domains">{{.i18n.Tr "admin.auths.allowed_domains"}}</label>
+              <input id="allowed_domains" name="allowed_domains" value="{{$cfg.AllowedDomains}}">
+              <p class="help">{{.i18n.Tr "admin.auths.allowed_domains_helper"}}</p>
+            </div>
             {{end}}
 
             <!-- PAM -->

templates/admin/auth/new.tmpl

@@ -103,6 +103,11 @@
                 <label for="smtp_port">{{.i18n.Tr "admin.auths.smtpport"}}</label>
                 <input id="smtp_port" name="smtp_port" value="{{.smtp_port}}">
               </div>
+              <div class="field">
+                <label for="allowed_domains">{{.i18n.Tr "admin.auths.allowed_domains"}}</label>
+                <input id="allowed_domains" name="allowed_domains" value="{{.allowed_domains}}">
+                <p class="help">{{.i18n.Tr "admin.auths.allowed_domains_helper"}}</p>
+              </div>
             </div>
 
             <!-- PAM -->