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Merge pull request #11 from JonathonReinhart/minor-cleanup-fixes

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Minor cleanup and fixes
This commit is contained in:
Bernhard Fröhlich
2021-02-16 15:36:52 +01:00
committed by GitHub
parent 0e8986ca79 009ae8f73a
commit c781938999
2 changed files with 65 additions and 65 deletions
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6
cmd/hasher.go
View File

@@ -8,11 +8,15 @@ import (
)
func main() {
if len(os.Args) != 2 {
fmt.Fprintln(os.Stderr, "Usage: hasher PASSWORD")
os.Exit(1)
}
password := os.Args[1]
hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
fmt.Println("Error generating hash: %s", err)
fmt.Fprintln(os.Stderr, "Error generating hash: %s", err)
}
fmt.Println(string(hash))
}

124
main.go
View File

@@ -33,6 +33,7 @@ func connectionChecker(peer smtpd.Peer) error {
}
}
log.Printf("Connection from peer=[%s] denied: Not in allowed_nets\n", peerIP)
return smtpd.Error{Code: 421, Message: "Denied"}
}
@@ -84,10 +85,13 @@ func senderChecker(peer smtpd.Peer, addr string) error {
if *allowedUsers != "" && peer.Username != "" {
user, err := AuthFetch(peer.Username)
if err != nil {
// Shouldn't happen: authChecker already validated username+password
return smtpd.Error{Code: 451, Message: "Bad sender address"}
}
if !addrAllowed(addr, user.allowedAddresses) {
log.Printf("Mail from=<%s> not allowed for authenticated user %s (%v)\n",
addr, peer.Username, peer.Addr)
return smtpd.Error{Code: 451, Message: "Bad sender address"}
}
}
@@ -106,6 +110,8 @@ func senderChecker(peer smtpd.Peer, addr string) error {
return nil
}
log.Printf("Mail from=<%s> not allowed by allowed_sender pattern for peer %v\n",
addr, peer.Addr)
return smtpd.Error{Code: 451, Message: "Bad sender address"}
}
@@ -124,13 +130,15 @@ func recipientChecker(peer smtpd.Peer, addr string) error {
return nil
}
log.Printf("Mail to=<%s> not allowed by allowed_recipients pattern for peer %v\n",
addr, peer.Addr)
return smtpd.Error{Code: 451, Message: "Bad recipient address"}
}
func authChecker(peer smtpd.Peer, username string, password string) error {
err := AuthCheckPassword(username, password)
if err != nil {
log.Printf("Auth error: %v\n", err)
log.Printf("Auth error for peer %v: %v\n", peer.Addr, err)
return smtpd.Error{Code: 535, Message: "Authentication credentials invalid"}
}
return nil
@@ -188,7 +196,7 @@ func mailHandler(peer smtpd.Peer, env smtpd.Envelope) error {
return nil
}
func main() {
func getTLSConfig() *tls.Config {
// Ciphersuites as defined in stock Go but without 3DES and RC4
// https://golang.org/src/crypto/tls/cipher_suites.go
var tlsCipherSuites = []uint16{
@@ -214,6 +222,24 @@ func main() {
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
}
if *localCert == "" || *localKey == "" {
log.Fatal("TLS certificate/key not defined in config")
}
cert, err := tls.LoadX509KeyPair(*localCert, *localKey)
if err != nil {
log.Fatal(err)
}
return &tls.Config{
PreferServerCipherSuites: true,
MinVersion: tls.VersionTLS11,
CipherSuites: tlsCipherSuites,
Certificates: []tls.Certificate{cert},
}
}
func main() {
ConfigLoad()
if *versionInfo {
@@ -231,11 +257,16 @@ func main() {
log.SetOutput(io.MultiWriter(os.Stdout, f))
}
listeners := strings.Split(*listen, " ")
for i := range listeners {
listener := listeners[i]
// Load allowed users file
if *allowedUsers != "" {
err := AuthLoadFile(*allowedUsers)
if err != nil {
log.Fatalf("Authentication file: %s\n", err)
}
}
// Create a server for each desired listen address
for _, listenAddr := range strings.Split(*listen, " ") {
server := &smtpd.Server{
Hostname: *hostName,
WelcomeMessage: *welcomeMsg,
@@ -246,76 +277,41 @@ func main() {
}
if *allowedUsers != "" {
err := AuthLoadFile(*allowedUsers)
if err != nil {
log.Fatalf("Authentication file: %s\n", err)
}
server.Authenticator = authChecker
}
if strings.Index(listeners[i], "://") == -1 {
log.Printf("Listen on %s ...\n", listener)
go server.ListenAndServe(listener)
} else if strings.HasPrefix(listeners[i], "starttls://") {
listener = strings.TrimPrefix(listener, "starttls://")
var lsnr net.Listener
var err error
if *localCert == "" || *localKey == "" {
log.Fatal("TLS certificate/key not defined in config")
}
if strings.Index(listenAddr, "://") == -1 {
log.Printf("Listen on %s ...\n", listenAddr)
cert, err := tls.LoadX509KeyPair(*localCert, *localKey)
if err != nil {
log.Fatal(err)
}
lsnr, err = net.Listen("tcp", listenAddr)
} else if strings.HasPrefix(listenAddr, "starttls://") {
listenAddr = strings.TrimPrefix(listenAddr, "starttls://")
server.TLSConfig = &tls.Config{
PreferServerCipherSuites: true,
MinVersion: tls.VersionTLS11,
CipherSuites: tlsCipherSuites,
Certificates: []tls.Certificate{cert},
}
server.TLSConfig = getTLSConfig()
server.ForceTLS = *localForceTLS
log.Printf("Listen on %s (STARTSSL) ...\n", listener)
lsnr, err := net.Listen("tcp", listener)
if err != nil {
log.Fatal(err)
}
defer lsnr.Close()
log.Printf("Listen on %s (STARTTLS) ...\n", listenAddr)
lsnr, err = net.Listen("tcp", listenAddr)
} else if strings.HasPrefix(listenAddr, "tls://") {
listenAddr = strings.TrimPrefix(listenAddr, "tls://")
go server.Serve(lsnr)
} else if strings.HasPrefix(listeners[i], "tls://") {
server.TLSConfig = getTLSConfig()
listener = strings.TrimPrefix(listener, "tls://")
if *localCert == "" || *localKey == "" {
log.Fatal("TLS certificate/key not defined in config")
}
cert, err := tls.LoadX509KeyPair(*localCert, *localKey)
if err != nil {
log.Fatal(err)
}
server.TLSConfig = &tls.Config{
PreferServerCipherSuites: true,
MinVersion: tls.VersionTLS11,
CipherSuites: tlsCipherSuites,
Certificates: []tls.Certificate{cert},
}
log.Printf("Listen on %s (TLS) ...\n", listener)
lsnr, err := tls.Listen("tcp", listener, server.TLSConfig)
if err != nil {
log.Fatal(err)
}
defer lsnr.Close()
go server.Serve(lsnr)
log.Printf("Listen on %s (TLS) ...\n", listenAddr)
lsnr, err = tls.Listen("tcp", listenAddr, server.TLSConfig)
} else {
log.Fatal("Unknown protocol in listener ", listener)
log.Fatal("Unknown protocol in listen address ", listenAddr)
}
if err != nil {
log.Fatal(err)
}
defer lsnr.Close()
go server.Serve(lsnr)
}
for true {