/
sender_churner.go
216 lines (185 loc) · 5 KB
/
sender_churner.go
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package main
import (
"bytes"
"crypto/sha256"
"encoding/hex"
"encoding/json"
"errors"
"net/mail"
"strings"
"github.com/bitly/go-nsq"
"github.com/blang/semver"
"github.com/lavab/api/client"
"github.com/lavab/api/routes"
"github.com/lavab/mailer/shared"
man "github.com/lavab/pgp-manifest-go"
"golang.org/x/crypto/openpgp"
)
type SenderEvent struct {
Name string `gorethink:"name"`
From string `gorethink:"from"`
Version string `gorethink:"version"`
To []string `gorethink:"to"`
Input interface{} `gorethink:"input"`
}
func initSender(username, password string) {
// Open the key file
/*keyFile, err := os.Open(keyPath)
if err != nil {
log.WithField("error", err.Error()).Fatal("Unable to open the private key file")
return
}
// Parse the key
keyring, err := openpgp.ReadArmoredKeyRing(r)*/
// jk, what am i smoking
api, err := client.New(*apiURL, 0)
if err != nil {
log.WithField("error", err.Error()).Fatal("Unable to connect to the Lavaboom API")
return
}
token, err := api.CreateToken(&routes.TokensCreateRequest{
Type: "auth",
Username: username,
Password: password,
})
if err != nil {
log.WithField("error", err.Error()).Fatal("Unable to sign into Lavaboom's API")
return
}
api.Headers["Authorization"] = "Bearer " + token.ID
cons, err := nsq.NewConsumer("sender_"+username, "sender", nsq.NewConfig())
if err != nil {
log.WithField("error", err.Error()).Fatal("Unable to consume the hub topic")
}
cons.AddHandler(nsq.HandlerFunc(func(m *nsq.Message) error {
log.Print("Handling sender event")
var ev *SenderEvent
if err := json.Unmarshal(m.Body, &ev); err != nil {
return err
}
// Parse the version
version, err := semver.Parse(ev.Version)
if err != nil {
return err
}
templateLock.RLock()
// Check if we have such template
if x, ok := templates[ev.Name]; !ok || len(x) == 0 {
templateLock.RUnlock()
return errors.New("No such template")
}
// Match the version
found := -1
for i := len(templateVersions[ev.Name]) - 1; i >= 0; i-- {
v2 := templateVersions[ev.Name][i]
if version.Major == v2.Major {
found = i
break
}
}
// Get the template
template := templates[ev.Name][templateVersions[ev.Name][found].String()]
// Execute the subject
subject := &bytes.Buffer{}
if err := template.SubjectTpl.Execute(subject, ev.Input); err != nil {
return err
}
// Execute the body
body := &bytes.Buffer{}
if err := template.BodyTpl.Execute(body, ev.Input); err != nil {
return err
}
// Send unencrypted
if !strings.HasSuffix(ev.To[0], "@lavaboom.com") {
// Send the email
resp, err := api.CreateEmail(&routes.EmailsCreateRequest{
Kind: "raw",
To: ev.To,
Body: body.String(),
Subject: subject.String(),
ContentType: "text/html",
})
if err != nil {
return err
}
// Log some debug info
log.Printf("Sent a \"%s\" email to %v - %v", subject.String(), ev.To, resp)
// We're done!
return nil
} else {
// Get user's key
key, err := api.GetKey(ev.To[0])
if err != nil {
log.Print(err)
m.Finish()
m.DisableAutoResponse()
return nil
}
// Parse the key
keyReader := strings.NewReader(key.Key)
keyring, err := openpgp.ReadArmoredKeyRing(keyReader)
if err != nil {
return err
}
// Hash the subject
subjectHash := sha256.Sum256(subject.Bytes())
// Hash the body
bodyHash := sha256.Sum256(body.Bytes())
// Parse the from address
from, err := mail.ParseAddress(ev.From)
if err != nil {
return err
}
// Manifest definition
manifest := &man.Manifest{
Version: semver.Version{1, 0, 0, nil, nil},
From: from,
To: []*mail.Address{
{
Address: ev.To[0],
},
},
Subject: subject.String(),
Parts: []*man.Part{
{
Hash: hex.EncodeToString(bodyHash[:]),
ID: "body",
ContentType: "text/html",
Size: body.Len(),
},
},
}
// Encrypt the body
ebody, err := shared.EncryptAndArmor(body.Bytes(), keyring)
if err != nil {
return err
}
// Generate the manifest
sman, err := man.Write(manifest)
if err != nil {
return err
}
eman, err := shared.EncryptAndArmor(sman, keyring)
if err != nil {
return err
}
// Send the email
resp, err := api.CreateEmail(&routes.EmailsCreateRequest{
Kind: "manifest",
From: ev.From,
To: ev.To,
Body: string(ebody),
Manifest: string(eman),
SubjectHash: hex.EncodeToString(subjectHash[:]),
})
if err != nil {
return err
}
// Log some debug info
log.Printf("Sent an encrypted \"%s\" email to %v - %v", subject.String(), ev.To, resp)
// We're done!
return nil
}
}))
cons.ConnectToNSQLookupd(*lookupdAddress)
}