Allow email relaying to a real MTA

This commit is contained in:
wpetit 2020-11-05 19:48:18 +01:00
parent 9035280818
commit 62344993f5
7 changed files with 213 additions and 8 deletions

View File

@ -53,6 +53,11 @@ func getServiceContainer(conf *config.Config) (*service.Container, error) {
cqrs.CommandHandlerFunc(command.HandleDeleteEmail), cqrs.CommandHandlerFunc(command.HandleDeleteEmail),
) )
bus.RegisterCommand(
cqrs.MatchCommandRequest(&command.RelayEmailRequest{}),
cqrs.CommandHandlerFunc(command.HandleRelayEmail),
)
bus.RegisterQuery( bus.RegisterQuery(
cqrs.MatchQueryRequest(&query.GetInboxRequest{}), cqrs.MatchQueryRequest(&query.GetInboxRequest{}),
cqrs.QueryHandlerFunc(query.HandleGetInbox), cqrs.QueryHandlerFunc(query.HandleGetInbox),

View File

@ -12,6 +12,7 @@ import (
"github.com/jhillyerd/enmime" "github.com/jhillyerd/enmime"
"github.com/pkg/errors" "github.com/pkg/errors"
"gitlab.com/wpetit/goweb/cqrs" "gitlab.com/wpetit/goweb/cqrs"
"gitlab.com/wpetit/goweb/logger"
"gitlab.com/wpetit/goweb/middleware/container" "gitlab.com/wpetit/goweb/middleware/container"
"gitlab.com/wpetit/goweb/service" "gitlab.com/wpetit/goweb/service"
) )
@ -74,12 +75,31 @@ func (s *Session) Data(r io.Reader) error {
return errors.Wrap(err, "could not retrieve cqrs service") return errors.Wrap(err, "could not retrieve cqrs service")
} }
conf, err := config.From(s.ctn)
if err != nil {
return errors.Wrap(err, "could not retrieve config service")
}
if conf.Relay.Enabled {
cmd := &command.RelayEmailRequest{
Envelope: env,
}
if _, err := bus.Exec(s.ctx, cmd); err != nil {
logger.Error(s.ctx, "could not exec command", logger.E(err))
return errors.Wrapf(err, "could not exec '%T' command", cmd)
}
}
cmd := &command.StoreEmailRequest{ cmd := &command.StoreEmailRequest{
Envelope: env, Envelope: env,
} }
if _, err := bus.Exec(s.ctx, cmd); err != nil { if _, err := bus.Exec(s.ctx, cmd); err != nil {
return errors.Wrap(err, "could not exec command") logger.Error(s.ctx, "could not exec command", logger.E(err))
return errors.Wrapf(err, "could not exec '%T' command", cmd)
} }
return nil return nil

2
go.mod
View File

@ -5,7 +5,7 @@ go 1.14
require ( require (
github.com/asdine/storm/v3 v3.1.1 github.com/asdine/storm/v3 v3.1.1
github.com/caarlos0/env/v6 v6.2.1 github.com/caarlos0/env/v6 v6.2.1
github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b // indirect github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21
github.com/emersion/go-smtp v0.12.1 github.com/emersion/go-smtp v0.12.1
github.com/go-chi/chi v4.1.1+incompatible github.com/go-chi/chi v4.1.1+incompatible
github.com/jhillyerd/enmime v0.8.0 github.com/jhillyerd/enmime v0.8.0

4
go.sum
View File

@ -53,8 +53,8 @@ github.com/dlclark/regexp2 v1.2.0 h1:8sAhBGEM0dRWogWqWyQeIJnxjWO6oIjl8FKqREDsGfk
github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc= github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
github.com/emersion/go-sasl v0.0.0-20190817083125-240c8404624e h1:ba7YsgX5OV8FjGi5ZWml8Jng6oBrJAb3ahqWMJ5Ce8Q= github.com/emersion/go-sasl v0.0.0-20190817083125-240c8404624e h1:ba7YsgX5OV8FjGi5ZWml8Jng6oBrJAb3ahqWMJ5Ce8Q=
github.com/emersion/go-sasl v0.0.0-20190817083125-240c8404624e/go.mod h1:G/dpzLu16WtQpBfQ/z3LYiYJn3ZhKSGWn83fyoyQe/k= github.com/emersion/go-sasl v0.0.0-20190817083125-240c8404624e/go.mod h1:G/dpzLu16WtQpBfQ/z3LYiYJn3ZhKSGWn83fyoyQe/k=
github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b h1:uhWtEWBHgop1rqEk2klKaxPAkVDCXexai6hSuRQ7Nvs= github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21 h1:OJyUGMJTzHTd1XQp98QTaHernxMYzRaOasRir9hUlFQ=
github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b/go.mod h1:G/dpzLu16WtQpBfQ/z3LYiYJn3ZhKSGWn83fyoyQe/k= github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
github.com/emersion/go-smtp v0.12.1 h1:1R8BDqrR2HhlGwgFYcOi+BVTvK1bMjAB65QcVpJ5sNA= github.com/emersion/go-smtp v0.12.1 h1:1R8BDqrR2HhlGwgFYcOi+BVTvK1bMjAB65QcVpJ5sNA=
github.com/emersion/go-smtp v0.12.1/go.mod h1:SD9V/xa4ndMw77lR3Mf7htkp8RBNYuPh9UeuBs9tpUQ= github.com/emersion/go-smtp v0.12.1/go.mod h1:SD9V/xa4ndMw77lR3Mf7htkp8RBNYuPh9UeuBs9tpUQ=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4= github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=

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@ -0,0 +1,164 @@
package command
import (
"context"
"crypto/tls"
"io"
"sync"
"github.com/emersion/go-sasl"
"github.com/emersion/go-smtp"
"forge.cadoles.com/wpetit/fake-smtp/internal/config"
"github.com/jhillyerd/enmime"
"github.com/pkg/errors"
"gitlab.com/wpetit/goweb/cqrs"
"gitlab.com/wpetit/goweb/middleware/container"
)
type RelayEmailRequest struct {
Envelope *enmime.Envelope
}
func HandleRelayEmail(ctx context.Context, cmd cqrs.Command) error {
req, ok := cmd.Request().(*RelayEmailRequest)
if !ok {
return cqrs.ErrUnexpectedRequest
}
ctn, err := container.From(ctx)
if err != nil {
return errors.Wrap(err, "could not retrieve service container")
}
conf, err := config.From(ctn)
if err != nil {
return errors.Wrap(err, "could not retrieve config service")
}
relay := conf.Relay
if err := forwardMail(req.Envelope, relay); err != nil {
return errors.Wrap(err, "could not forward mail")
}
return nil
}
func forwardMail(env *enmime.Envelope, conf config.RelayConfig) error {
var tlsConfig *tls.Config
if conf.InsecureSkipVerify {
tlsConfig = &tls.Config{
// nolint: gosec
InsecureSkipVerify: true,
}
}
addr := conf.Address
var (
client *smtp.Client
err error
)
if conf.UseTLS {
client, err = smtp.DialTLS(addr, tlsConfig)
if err != nil {
return errors.WithStack(err)
}
} else {
client, err = smtp.Dial(addr)
if err != nil {
return errors.WithStack(err)
}
}
defer client.Close()
if err = client.Hello("localhost"); err != nil {
return errors.WithStack(err)
}
if ok, _ := client.Extension("STARTTLS"); ok {
if err = client.StartTLS(tlsConfig); err != nil {
return errors.WithStack(err)
}
}
if conf.Username != "" || conf.Password != "" {
if ok, _ := client.Extension("AUTH"); ok {
var auth sasl.Client
if conf.Anonymous {
auth = sasl.NewAnonymousClient("fakesmtp")
} else {
auth = sasl.NewPlainClient(conf.Identity, conf.Username, conf.Password)
}
if err := client.Auth(auth); err != nil {
return errors.WithStack(err)
}
}
}
var from string
if conf.FromOverride != "" {
from = conf.FromOverride
} else {
from = env.GetHeader("From")
}
if err = client.Mail(from, nil); err != nil {
return errors.WithStack(err)
}
to := env.GetHeaderValues("To")
for _, addr := range to {
if err = client.Rcpt(addr); err != nil {
return errors.WithStack(err)
}
}
w, err := client.Data()
if err != nil {
return errors.WithStack(err)
}
pr, pw := io.Pipe()
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
defer pw.Close()
if err = env.Root.Encode(pw); err != nil {
err = errors.WithStack(err)
}
}()
_, err = io.Copy(w, pr)
if err != nil {
return err
}
wg.Wait()
if err != nil {
return errors.WithStack(err)
}
if err = w.Close(); err != nil {
return err
}
if err := client.Quit(); err != nil {
return errors.WithStack(err)
}
return nil
}

View File

@ -12,9 +12,10 @@ import (
) )
type Config struct { type Config struct {
HTTP HTTPConfig `yaml:"http"` HTTP HTTPConfig `yaml:"http"`
SMTP SMTPConfig `yaml:"smtp"` SMTP SMTPConfig `yaml:"smtp"`
Data DataConfig `ymal:"data"` Data DataConfig `yaml:"data"`
Relay RelayConfig `yaml:"relay"`
} }
type HTTPConfig struct { type HTTPConfig struct {
@ -36,6 +37,18 @@ type SMTPConfig struct {
Debug bool `yaml:"debug" env:"FAKESMTP_SMTP_DEBUG"` Debug bool `yaml:"debug" env:"FAKESMTP_SMTP_DEBUG"`
} }
type RelayConfig struct {
Enabled bool `yaml:"enabled" env:"FAKESMTP_RELAY_ENABLED"`
Address string `yaml:"address" env:"FAKESMTP_RELAY_ADDRESS"`
Identity string `yaml:"identity" env:"FAKESMTP_RELAY_IDENTITY"`
Username string `yaml:"username" env:"FAKESMTP_RELAY_USERNAME"`
Password string `yaml:"password" env:"FAKESMTP_RELAY_PASSWORD"`
Anonymous bool `yaml:"anonymous" env:"FAKESMTP_RELAY_ANONYMOUS"`
UseTLS bool `yaml:"useTLS" env:"FAKESMTP_RELAY_USE_TLS"`
InsecureSkipVerify bool `yaml:"insecureSkipVerify" env:"FAKESMTP_RELAY_INSECURE_SKIP_VERIFY"`
FromOverride string `yaml:"fromOverride" env:"FAKESMTP_RELAY_FROM_OVERRIDE"`
}
type DataConfig struct { type DataConfig struct {
Path string `yaml:"path" env:"FAKESMTP_DATA_PATH"` Path string `yaml:"path" env:"FAKESMTP_DATA_PATH"`
} }
@ -91,6 +104,9 @@ func NewDefault() *Config {
Data: DataConfig{ Data: DataConfig{
Path: "fakesmtp.db", Path: "fakesmtp.db",
}, },
Relay: RelayConfig{
Enabled: false,
},
} }
} }

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@ -6,7 +6,7 @@ for i in {1..10}; do
-s "Test ${i}" \ -s "Test ${i}" \
-a README.md \ -a README.md \
-a package.json \ -a package.json \
foo_${i}@bar_${i}.com \ foo_${i}@bar${i}.com \
<<EOF <<EOF
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