feat: add option to skip TLS certificate check and ability to send test email

backend/email-templates/test_html.tmpl

@@ -0,0 +1,11 @@
+{{ define "base" -}}
+    <div class="header">
+        <div class="logo">
+            <img src="{{ .LogoURL }}" alt="Pocket ID"/>
+            <h1>{{ .AppName }}</h1>
+        </div>
+    </div>
+    <div class="content">
+        <p>This is a test email.</p>
+    </div>
+{{ end -}}

backend/email-templates/test_text.tmpl

@@ -0,0 +1,3 @@
+{{ define "base" -}}
+This is a test email.
+{{ end -}}

backend/internal/bootstrap/router_bootstrap.go

@@ -30,7 +30,7 @@ func initRouter(db *gorm.DB, appConfigService *service.AppConfigService) {
 
 	// Initialize services
 	templateDir := os.DirFS(common.EnvConfig.EmailTemplatesPath)
-	emailService, err := service.NewEmailService(appConfigService, templateDir)
+	emailService, err := service.NewEmailService(appConfigService, db, templateDir)
 	if err != nil {
 		log.Fatalf("Unable to create email service: %s", err)
 	}
@@ -58,7 +58,7 @@ func initRouter(db *gorm.DB, appConfigService *service.AppConfigService) {
 	controller.NewWebauthnController(apiGroup, jwtAuthMiddleware, middleware.NewRateLimitMiddleware(), webauthnService)
 	controller.NewOidcController(apiGroup, jwtAuthMiddleware, fileSizeLimitMiddleware, oidcService, jwtService)
 	controller.NewUserController(apiGroup, jwtAuthMiddleware, middleware.NewRateLimitMiddleware(), userService, appConfigService)
-	controller.NewAppConfigController(apiGroup, jwtAuthMiddleware, appConfigService)
+	controller.NewAppConfigController(apiGroup, jwtAuthMiddleware, appConfigService, emailService)
 	controller.NewAuditLogController(apiGroup, auditLogService, jwtAuthMiddleware)
 	controller.NewUserGroupController(apiGroup, jwtAuthMiddleware, userGroupService)
 	controller.NewCustomClaimController(apiGroup, jwtAuthMiddleware, customClaimService)

backend/internal/controller/app_config_controller.go

@@ -14,10 +14,13 @@ import (
 func NewAppConfigController(
 	group *gin.RouterGroup,
 	jwtAuthMiddleware *middleware.JwtAuthMiddleware,
-	appConfigService *service.AppConfigService) {
+	appConfigService *service.AppConfigService,
+	emailService *service.EmailService,
+) {
 
 	acc := &AppConfigController{
 		appConfigService: appConfigService,
+		emailService:     emailService,
 	}
 	group.GET("/application-configuration", acc.listAppConfigHandler)
 	group.GET("/application-configuration/all", jwtAuthMiddleware.Add(true), acc.listAllAppConfigHandler)
@@ -29,10 +32,13 @@ func NewAppConfigController(
 	group.PUT("/application-configuration/logo", jwtAuthMiddleware.Add(true), acc.updateLogoHandler)
 	group.PUT("/application-configuration/favicon", jwtAuthMiddleware.Add(true), acc.updateFaviconHandler)
 	group.PUT("/application-configuration/background-image", jwtAuthMiddleware.Add(true), acc.updateBackgroundImageHandler)
+
+	group.POST("/application-configuration/test-email", jwtAuthMiddleware.Add(true), acc.testEmailHandler)
 }
 
 type AppConfigController struct {
 	appConfigService *service.AppConfigService
+	emailService     *service.EmailService
 }
 
 func (acc *AppConfigController) listAppConfigHandler(c *gin.Context) {
@@ -175,3 +181,13 @@ func (acc *AppConfigController) updateImage(c *gin.Context, imageName string, ol
 
 	c.Status(http.StatusNoContent)
 }
+
+func (acc *AppConfigController) testEmailHandler(c *gin.Context) {
+	err := acc.emailService.SendTestEmail()
+	if err != nil {
+		c.Error(err)
+		return
+	}
+
+	c.Status(http.StatusNoContent)
+}

backend/internal/dto/app_config_dto.go

@@ -22,4 +22,5 @@ type AppConfigUpdateDto struct {
 	SmtpFrom            string `json:"smtpFrom" binding:"omitempty,email"`
 	SmtpUser            string `json:"smtpUser"`
 	SmtpPassword        string `json:"smtpPassword"`
+	SmtpSkipCertVerify  string `json:"smtpSkipCertVerify"`
 }

backend/internal/model/app_config.go

@@ -25,4 +25,5 @@ type AppConfig struct {
 	SmtpFrom           AppConfigVariable
 	SmtpUser           AppConfigVariable
 	SmtpPassword       AppConfigVariable
+	SmtpSkipCertVerify AppConfigVariable
 }

backend/internal/model/user.go

@@ -59,6 +59,8 @@ func (u User) WebAuthnCredentialDescriptors() (descriptors []protocol.Credential
 	return descriptors
 }
 
+func (u User) FullName() string { return u.FirstName + " " + u.LastName }
+
 type OneTimeAccessToken struct {
 	Base
 	Token     string

backend/internal/service/app_config_service.go

@@ -95,6 +95,11 @@ var defaultDbConfig = model.AppConfig{
 		Key:  "smtpPassword",
 		Type: "string",
 	},
+	SmtpSkipCertVerify: model.AppConfigVariable{
+		Key:          "smtpSkipCertVerify",
+		Type:         "bool",
+		DefaultValue: "false",
+	},
 }
 
 func (s *AppConfigService) UpdateAppConfig(input dto.AppConfigUpdateDto) ([]model.AppConfigVariable, error) {

backend/internal/service/email_service.go

@@ -2,14 +2,18 @@ package service
 
 import (
 	"bytes"
+	"crypto/tls"
 	"errors"
 	"fmt"
 	"github.com/stonith404/pocket-id/backend/internal/common"
+	"github.com/stonith404/pocket-id/backend/internal/model"
 	"github.com/stonith404/pocket-id/backend/internal/utils/email"
+	"gorm.io/gorm"
 	htemplate "html/template"
 	"io/fs"
 	"mime/multipart"
 	"mime/quotedprintable"
+	"net"
 	"net/smtp"
 	"net/textproto"
 	ttemplate "text/template"
@@ -17,11 +21,12 @@ import (
 
 type EmailService struct {
 	appConfigService *AppConfigService
+	db               *gorm.DB
 	htmlTemplates    map[string]*htemplate.Template
 	textTemplates    map[string]*ttemplate.Template
 }
 
-func NewEmailService(appConfigService *AppConfigService, templateDir fs.FS) (*EmailService, error) {
+func NewEmailService(appConfigService *AppConfigService, db *gorm.DB, templateDir fs.FS) (*EmailService, error) {
 	htmlTemplates, err := email.PrepareHTMLTemplates(templateDir, emailTemplatesPaths)
 	if err != nil {
 		return nil, fmt.Errorf("prepare html templates: %w", err)
@@ -34,11 +39,25 @@ func NewEmailService(appConfigService *AppConfigService, templateDir fs.FS) (*Em
 
 	return &EmailService{
 		appConfigService: appConfigService,
+		db:               db,
 		htmlTemplates:    htmlTemplates,
 		textTemplates:    textTemplates,
 	}, nil
 }
 
+func (srv *EmailService) SendTestEmail() error {
+	var user model.User
+	if err := srv.db.First(&user).Error; err != nil {
+		return err
+	}
+
+	return SendEmail(srv,
+		email.Address{
+			Email: user.Email,
+			Name:  user.FullName(),
+		}, TestTemplate, nil)
+}
+
 func SendEmail[V any](srv *EmailService, toEmail email.Address, template email.Template[V], tData *V) error {
 	// Check if SMTP settings are set
 	if srv.appConfigService.DbConfig.EmailEnabled.Value != "true" {
@@ -71,26 +90,100 @@ func SendEmail[V any](srv *EmailService, toEmail email.Address, template email.T
 	)
 	c.Body(body)
 
-	// Set up the authentication information.
+	// Set up the TLS configuration
+	tlsConfig := &tls.Config{
+		InsecureSkipVerify: srv.appConfigService.DbConfig.SmtpSkipCertVerify.Value == "true",
+		ServerName:         srv.appConfigService.DbConfig.SmtpHost.Value,
+	}
+
+	// Connect to the SMTP server
+	port := srv.appConfigService.DbConfig.SmtpPort.Value
+	var client *smtp.Client
+	if port == "465" {
+		client, err = srv.connectToSmtpServerUsingImplicitTLS(
+			srv.appConfigService.DbConfig.SmtpHost.Value+":"+port,
+			tlsConfig,
+		)
+	} else {
+		client, err = srv.connectToSmtpServerUsingStartTLS(
+			srv.appConfigService.DbConfig.SmtpHost.Value+":"+port,
+			tlsConfig,
+		)
+	}
+	defer client.Quit()
+	if err != nil {
+		return fmt.Errorf("failed to connect to SMTP server: %w", err)
+	}
+
+	// Set up the authentication
 	auth := smtp.PlainAuth("",
 		srv.appConfigService.DbConfig.SmtpUser.Value,
 		srv.appConfigService.DbConfig.SmtpPassword.Value,
 		srv.appConfigService.DbConfig.SmtpHost.Value,
 	)
-
+	if err := client.Auth(auth); err != nil {
-	// Send the email
+		return fmt.Errorf("failed to authenticate SMTP client: %w", err)
-	err = smtp.SendMail(
-		srv.appConfigService.DbConfig.SmtpHost.Value+":"+srv.appConfigService.DbConfig.SmtpPort.Value,
-		auth,
-		srv.appConfigService.DbConfig.SmtpFrom.Value,
-		[]string{toEmail.Email},
-		[]byte(c.String()),
-	)
-
-	if err != nil {
-		return fmt.Errorf("failed to send email: %w", err)
 	}
 
+	// Send the email
+	if err := srv.sendEmailContent(client, toEmail, c); err != nil {
+		return fmt.Errorf("send email content: %w", err)
+	}
+
+	return nil
+}
+
+func (srv *EmailService) connectToSmtpServerUsingImplicitTLS(serverAddr string, tlsConfig *tls.Config) (*smtp.Client, error) {
+	conn, err := tls.Dial("tcp", serverAddr, tlsConfig)
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to SMTP server: %w", err)
+	}
+
+	client, err := smtp.NewClient(conn, srv.appConfigService.DbConfig.SmtpHost.Value)
+	if err != nil {
+		conn.Close()
+		return nil, fmt.Errorf("failed to create SMTP client: %w", err)
+	}
+
+	return client, nil
+}
+
+func (srv *EmailService) connectToSmtpServerUsingStartTLS(serverAddr string, tlsConfig *tls.Config) (*smtp.Client, error) {
+	conn, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to SMTP server: %w", err)
+	}
+
+	client, err := smtp.NewClient(conn, srv.appConfigService.DbConfig.SmtpHost.Value)
+	if err != nil {
+		conn.Close()
+		return nil, fmt.Errorf("failed to create SMTP client: %w", err)
+	}
+
+	if err := client.StartTLS(tlsConfig); err != nil {
+		return nil, fmt.Errorf("failed to start TLS: %w", err)
+	}
+	return client, nil
+}
+
+func (srv *EmailService) sendEmailContent(client *smtp.Client, toEmail email.Address, c *email.Composer) error {
+	if err := client.Mail(srv.appConfigService.DbConfig.SmtpFrom.Value); err != nil {
+		return fmt.Errorf("failed to set sender: %w", err)
+	}
+	if err := client.Rcpt(toEmail.Email); err != nil {
+		return fmt.Errorf("failed to set recipient: %w", err)
+	}
+	w, err := client.Data()
+	if err != nil {
+		return fmt.Errorf("failed to start data: %w", err)
+	}
+	_, err = w.Write([]byte(c.String()))
+	if err != nil {
+		return fmt.Errorf("failed to write email data: %w", err)
+	}
+	if err := w.Close(); err != nil {
+		return fmt.Errorf("failed to close data writer: %w", err)
+	}
 	return nil
 }
 

backend/internal/service/email_service_templates.go

@@ -27,6 +27,13 @@ var NewLoginTemplate = email.Template[NewLoginTemplateData]{
 	},
 }
 
+var TestTemplate = email.Template[struct{}]{
+	Path: "test",
+	Title: func(data *email.TemplateData[struct{}]) string {
+		return "Test email"
+	},
+}
+
 type NewLoginTemplateData struct {
 	IPAddress string
 	Country   string
@@ -36,4 +43,4 @@ type NewLoginTemplateData struct {
 }
 
 // this is list of all template paths used for preloading templates
-var emailTemplatesPaths = []string{NewLoginTemplate.Path}
+var emailTemplatesPaths = []string{NewLoginTemplate.Path, TestTemplate.Path}

backend/internal/service/oidc_service.go

@@ -352,7 +352,7 @@ func (s *OidcService) GetUserClaimsForClient(userID string, clientID string) (ma
 	profileClaims := map[string]interface{}{
 		"given_name":         user.FirstName,
 		"family_name":        user.LastName,
-		"name":               user.FirstName + " " + user.LastName,
+		"name":               user.FullName(),
 		"preferred_username": user.Username,
 	}
 

frontend/src/lib/services/app-config-service.ts

@@ -53,6 +53,10 @@ export default class AppConfigService extends APIService {
 		await this.api.put(`/application-configuration/background-image`, formData);
 	}
 
+	async sendTestEmail() {
+		await this.api.post('/application-configuration/test-email');
+	}
+
 	async getVersionInformation() {
 		const response = (
 			await axios.get('https://api.github.com/repos/stonith404/pocket-id/releases/latest')

frontend/src/lib/types/application-configuration.ts

@@ -12,6 +12,7 @@ export type AllAppConfig = AppConfig & {
 	smtpFrom: string;
 	smtpUser: string;
 	smtpPassword: string;
+	smtpSkipCertVerify: boolean;
 };
 
 export type AppConfigRawResponse = {

frontend/src/routes/settings/admin/application-configuration/forms/app-config-email-form.svelte

@@ -1,6 +1,8 @@
 <script lang="ts">
+	import CheckboxWithLabel from '$lib/components/checkbox-with-label.svelte';
 	import FormInput from '$lib/components/form-input.svelte';
 	import { Button } from '$lib/components/ui/button';
+	import AppConfigService from '$lib/services/app-config-service';
 	import type { AllAppConfig } from '$lib/types/application-configuration';
 	import { createForm } from '$lib/utils/form-util';
 	import { toast } from 'svelte-sonner';
@@ -14,7 +16,9 @@
 		callback: (appConfig: Partial<AllAppConfig>) => Promise<void>;
 	} = $props();
 
-	let isLoading = $state(false);
+	const appConfigService = new AppConfigService();
+
+	let isSendingTestEmail = $state(false);
 	let emailEnabled = $state(appConfig.emailEnabled);
 
 	const updatedAppConfig = {
@@ -23,7 +27,8 @@
 		smtpPort: appConfig.smtpPort,
 		smtpUser: appConfig.smtpUser,
 		smtpPassword: appConfig.smtpPassword,
-		smtpFrom: appConfig.smtpFrom
+		smtpFrom: appConfig.smtpFrom,
+		smtpSkipCertVerify: appConfig.smtpSkipCertVerify
 	};
 
 	const formSchema = z.object({
@@ -31,7 +36,8 @@
 		smtpPort: z.number().min(1),
 		smtpUser: z.string().min(1),
 		smtpPassword: z.string().min(1),
-		smtpFrom: z.string().email()
+		smtpFrom: z.string().email(),
+		smtpSkipCertVerify: z.boolean()
 	});
 
 	const { inputs, ...form } = createForm<typeof formSchema>(formSchema, updatedAppConfig);
@@ -39,11 +45,10 @@
 	async function onSubmit() {
 		const data = form.validate();
 		if (!data) return false;
-		isLoading = true;
 		await callback({
 			...data,
 			emailEnabled: true
-		}).finally(() => (isLoading = false));
+		});
 		toast.success('Email configuration updated successfully');
 		return true;
 	}
@@ -59,6 +64,17 @@
 			emailEnabled = true;
 		}
 	}
+
+	async function onTestEmail() {
+		isSendingTestEmail = true;
+		await appConfigService
+			.sendTestEmail()
+			.then(() => toast.success('Test email sent successfully to your Email address.'))
+			.catch(() =>
+				toast.error('Failed to send test email. Check the server logs for more information.')
+			)
+			.finally(() => (isSendingTestEmail = false));
+	}
 </script>
 
 <form onsubmit={onSubmit}>
@@ -68,13 +84,23 @@
 		<FormInput label="SMTP User" bind:input={$inputs.smtpUser} />
 		<FormInput label="SMTP Password" type="password" bind:input={$inputs.smtpPassword} />
 		<FormInput label="SMTP From" bind:input={$inputs.smtpFrom} />
+		<CheckboxWithLabel
+			id="skip-cert-verify"
+			label="Skip Certificate Verification"
+			description="This can be useful for self-signed certificates."
+			bind:checked={$inputs.smtpSkipCertVerify.value}
+		/>
 	</div>
-	<div class="mt-5 flex justify-end gap-3">
+	<div class="mt-8 flex justify-end gap-3">
 		{#if emailEnabled}
 			<Button variant="secondary" onclick={onDisable}>Disable</Button>
-			<Button {isLoading} onclick={onSubmit} type="submit">Save</Button>
+			<Button isLoading={isSendingTestEmail} variant="secondary" onclick={onTestEmail}
+				>Send Test Email</Button
+			>
+
+			<Button onclick={onSubmit} type="submit">Save</Button>
 		{:else}
-			<Button {isLoading} onclick={onEnable} type="submit">Enable</Button>
+			<Button onclick={onEnable} type="submit">Enable</Button>
 		{/if}
 	</div>
 </form>