MF-1059 - Add TLS support for email (absmach#1560)

* Use gomail package for sending emails Signed-off-by: Ivan Milosevic <[email protected]> * remove print err Signed-off-by: Ivan Milosevic <[email protected]> * Add vendor Signed-off-by: Ivan Milosevic <[email protected]> * Rename email structure remove logger Signed-off-by: Ivan Milosevic <[email protected]> * typo in var name Signed-off-by: Ivan Milosevic <[email protected]> * rename var Signed-off-by: Ivan Milosevic <[email protected]> * remove MF_EMAIL_SECRET Signed-off-by: Ivan Milosevic <[email protected]>
mteodor · Feb 7, 2022 · 1f8a221 · 1f8a221
1 parent 9e0947a
commit 1f8a221
Show file tree

Hide file tree

Showing 29 changed files with 1,895 additions and 38 deletions.
diff --git a/cmd/smtp-notifier/main.go b/cmd/smtp-notifier/main.go
@@ -59,7 +59,6 @@ const (
 	defEmailPort        = "25"
 	defEmailUsername    = "root"
 	defEmailPassword    = ""
-	defEmailSecret      = ""
 	defEmailFromAddress = ""
 	defEmailFromName    = ""
 	defEmailTemplate    = "email.tmpl"
@@ -91,7 +90,6 @@ const (
 	envEmailPort        = "MF_EMAIL_PORT"
 	envEmailUsername    = "MF_EMAIL_USERNAME"
 	envEmailPassword    = "MF_EMAIL_PASSWORD"
-	envEmailSecret      = "MF_EMAIL_SECRET"
 	envEmailFromAddress = "MF_EMAIL_FROM_ADDRESS"
 	envEmailFromName    = "MF_EMAIL_FROM_NAME"
 	envEmailTemplate    = "MF_SMTP_NOTIFIER_TEMPLATE"
@@ -200,7 +198,6 @@ func loadConfig() config {
 		Port:        mainflux.Env(envEmailPort, defEmailPort),
 		Username:    mainflux.Env(envEmailUsername, defEmailUsername),
 		Password:    mainflux.Env(envEmailPassword, defEmailPassword),
-		Secret:      mainflux.Env(envEmailSecret, defEmailSecret),
 		Template:    mainflux.Env(envEmailTemplate, defEmailTemplate),
 	}
 

diff --git a/cmd/users/main.go b/cmd/users/main.go
@@ -59,7 +59,6 @@ const (
 	defEmailPort        = "25"
 	defEmailUsername    = "root"
 	defEmailPassword    = ""
-	defEmailSecret      = ""
 	defEmailFromAddress = ""
 	defEmailFromName    = ""
 	defEmailTemplate    = "email.tmpl"
@@ -100,7 +99,6 @@ const (
 	envEmailPort        = "MF_EMAIL_PORT"
 	envEmailUsername    = "MF_EMAIL_USERNAME"
 	envEmailPassword    = "MF_EMAIL_PASSWORD"
-	envEmailSecret      = "MF_EMAIL_SECRET"
 	envEmailFromAddress = "MF_EMAIL_FROM_ADDRESS"
 	envEmailFromName    = "MF_EMAIL_FROM_NAME"
 	envEmailLogLevel    = "MF_EMAIL_LOG_LEVEL"
@@ -214,7 +212,6 @@ func loadConfig() config {
 		Port:        mainflux.Env(envEmailPort, defEmailPort),
 		Username:    mainflux.Env(envEmailUsername, defEmailUsername),
 		Password:    mainflux.Env(envEmailPassword, defEmailPassword),
-		Secret:      mainflux.Env(envEmailSecret, defEmailSecret),
 		Template:    mainflux.Env(envEmailTemplate, defEmailTemplate),
 	}
 

diff --git a/consumers/notifiers/smtp/README.md b/consumers/notifiers/smtp/README.md
@@ -29,8 +29,7 @@ default values.
 | MF_EMAIL_HOST                     | Mail server host                                                        | localhost             |
 | MF_EMAIL_PORT                     | Mail server port                                                        | 25                    |
 | MF_EMAIL_USERNAME                 | Mail server username                                                    |                       |
-| MF_EMAIL_PASSWORD                 | Mail server password for Basic authentication                           |                       |
-| MF_EMAIL_SECRET                   | Mail server secret for CRAM-MD5 authentication                          |                       |
+| MF_EMAIL_PASSWORD                 | Mail server password                                                    |                       |
 | MF_EMAIL_FROM_ADDRESS             | Email "from" address                                                    |                       |
 | MF_EMAIL_FROM_NAME                | Email "from" name                                                       |                       |
 | MF_EMAIL_TEMPLATE                 | Email template for sending notification emails                          | email.tmpl            |

diff --git a/go.mod b/go.mod
@@ -44,6 +44,7 @@ require (
 	golang.org/x/net v0.0.0-20220114011407-0dd24b26b47d
 	gonum.org/v1/gonum v0.9.3
 	google.golang.org/grpc v1.43.0
+	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
 )
 
 require (
@@ -142,6 +143,7 @@ require (
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/genproto v0.0.0-20220114231437-d2e6a121cae0 // indirect
 	google.golang.org/protobuf v1.27.1 // indirect
+	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
 	gopkg.in/gorp.v1 v1.7.2 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/ini.v1 v1.66.2 // indirect

diff --git a/go.sum b/go.sum
@@ -2019,6 +2019,8 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc h1:2gGKlE2+asNV9m7xrywl36YYNnBG5ZQ0r/BOOxqPpmk=
+gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -2030,6 +2032,8 @@ gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/fsnotify/fsnotify.v1 v1.4.7/go.mod h1:Fyux9zXlo4rWoMSIzpn9fDAYjalPqJ/K1qJ27s+7ltE=
 gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
+gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df h1:n7WqCuqOuCbNr617RXOY0AWRXxgwEyPp2z+p0+hgMuE=
+gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
 gopkg.in/gorp.v1 v1.7.1/go.mod h1:Wo3h+DBQZIxATwftsglhdD/62zRFPhGhTiu5jUJmCaw=
 gopkg.in/gorp.v1 v1.7.2 h1:j3DWlAyGVv8whO7AcIWznQ2Yj7yJkn34B8s63GViAAw=
 gopkg.in/gorp.v1 v1.7.2/go.mod h1:Wo3h+DBQZIxATwftsglhdD/62zRFPhGhTiu5jUJmCaw=

diff --git a/internal/email/README.md b/internal/email/README.md
@@ -12,15 +12,10 @@ Mainflux Email Agent is configured using the following configuration parameters:
 | MF_EMAIL_HOST                       | Mail server host                                                        |
 | MF_EMAIL_PORT                       | Mail server port                                                        |
 | MF_EMAIL_USERNAME                   | Mail server username                                                    |
-| MF_EMAIL_PASSWORD                   | Mail server password for Basic authentication                           |
-| MF_EMAIL_SECRET                     | Mail server secret for CRAM-MD5 authentication                          |
+| MF_EMAIL_PASSWORD                   | Mail server password                                                    |
 | MF_EMAIL_FROM_ADDRESS               | Email "from" address                                                    |
 | MF_EMAIL_FROM_NAME                  | Email "from" name                                                       |
 | MF_EMAIL_TEMPLATE                   | Email template for sending notification emails                          |
 
 There are two authentication methods supported: Basic Auth and CRAM-MD5.
-`MF_EMAIL_SECRET` indicates that `CRAM-MD5` authentication will be used.
-`MF_EMAIL_PASSWORD` indicates that `Basic` authentication will be used.
-If both `MF_EMAIL_SECRET` and `MF_EMAIL_PASSWORD` are present, `CRAM-MD5` authentication will be used.
-If `MF_EMAIL_USERNAME` is empty or both `MF_EMAIL_SECRET` and `MF_EMAIL_PASSWORD` are empty, 
-no authentication will be used.
+If `MF_EMAIL_USERNAME` is empty, no authentication will be used.
diff --git a/internal/email/email.go b/internal/email/email.go
@@ -5,13 +5,12 @@ package email
 
 import (
 	"bytes"
-	"fmt"
 	"net/mail"
-	"net/smtp"
+	"strconv"
 	"text/template"
 
-	"github.com/mainflux/mainflux/logger"
 	"github.com/mainflux/mainflux/pkg/errors"
+	"gopkg.in/gomail.v2"
 )
 
 var (
@@ -22,7 +21,7 @@ var (
 	errSendMail             = errors.New("Sending e-mail failed")
 )
 
-type emailTemplate struct {
+type email struct {
 	To      []string
 	From    string
 	Subject string
@@ -37,7 +36,6 @@ type Config struct {
 	Port        string
 	Username    string
 	Password    string
-	Secret      string
 	FromAddress string
 	FromName    string
 	Template    string
@@ -46,25 +44,20 @@ type Config struct {
 // Agent for mailing
 type Agent struct {
 	conf *Config
-	auth smtp.Auth
-	addr string
-	log  logger.Logger
 	tmpl *template.Template
+	dial *gomail.Dialer
 }
 
 // New creates new email agent
 func New(c *Config) (*Agent, error) {
 	a := &Agent{}
 	a.conf = c
-	if c.Username != "" {
-		switch {
-		case c.Secret != "":
-			a.auth = smtp.CRAMMD5Auth(c.Username, c.Secret)
-		case c.Password != "":
-			a.auth = smtp.PlainAuth("", c.Username, c.Password, c.Host)
-		}
+	port, err := strconv.Atoi(c.Port)
+	if err != nil {
+		return a, err
 	}
-	a.addr = fmt.Sprintf("%s:%s", c.Host, c.Port)
+	d := gomail.NewDialer(c.Host, port, c.Username, c.Password)
+	a.dial = d
 
 	tmpl, err := template.ParseFiles(c.Template)
 	if err != nil {
@@ -80,8 +73,8 @@ func (a *Agent) Send(To []string, From, Subject, Header, Content, Footer string)
 		return errMissingEmailTemplate
 	}
 
-	email := new(bytes.Buffer)
-	tmpl := emailTemplate{
+	buff := new(bytes.Buffer)
+	e := email{
 		To:      To,
 		From:    From,
 		Subject: Subject,
@@ -91,14 +84,20 @@ func (a *Agent) Send(To []string, From, Subject, Header, Content, Footer string)
 	}
 	if From == "" {
 		from := mail.Address{Name: a.conf.FromName, Address: a.conf.FromAddress}
-		tmpl.From = from.String()
+		e.From = from.String()
 	}
 
-	if err := a.tmpl.Execute(email, tmpl); err != nil {
+	if err := a.tmpl.Execute(buff, e); err != nil {
 		return errors.Wrap(errExecTemplate, err)
 	}
 
-	if err := smtp.SendMail(a.addr, a.auth, a.conf.FromAddress, To, email.Bytes()); err != nil {
+	m := gomail.NewMessage()
+	m.SetHeader("From", e.From)
+	m.SetHeader("To", To...)
+	m.SetHeader("Subject", Subject)
+	m.SetBody("text/plain", buff.String())
+
+	if err := a.dial.DialAndSend(m); err != nil {
 		return errors.Wrap(errSendMail, err)
 	}
 

diff --git a/users/README.md b/users/README.md
@@ -37,8 +37,7 @@ default values.
 | MF_EMAIL_HOST             | Mail server host                                                        | localhost      |
 | MF_EMAIL_PORT             | Mail server port                                                        | 25             |
 | MF_EMAIL_USERNAME         | Mail server username                                                    |                |
-| MF_EMAIL_PASSWORD         | Mail server password for Basic authentication                           |                |
-| MF_EMAIL_SECRET           | Mail server secret for CRAM-MD5 authentication                          |                |
+| MF_EMAIL_PASSWORD         | Mail server password                                                    |                |
 | MF_EMAIL_FROM_ADDRESS     | Email "from" address                                                    |                |
 | MF_EMAIL_FROM_NAME        | Email "from" name                                                       |                |
 | MF_EMAIL_TEMPLATE         | Email template for sending emails with password reset link              | email.tmpl     |

diff --git a/vendor/gopkg.in/alexcesaro/quotedprintable.v3/LICENSE b/vendor/gopkg.in/alexcesaro/quotedprintable.v3/LICENSE
diff --git a/vendor/gopkg.in/alexcesaro/quotedprintable.v3/README.md b/vendor/gopkg.in/alexcesaro/quotedprintable.v3/README.md