mirror of
https://github.com/wneessen/go-mail.git
synced 2024-11-24 14:40:49 +01:00
Add experimental NTLMv2 authentication support
Introduced NTLMv2 authentication mechanism with tests in smtp package. Utilized the go-ntlmssp library to handle negotiation and response processing for NTLMv2 protocol.
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4 changed files with 204 additions and 0 deletions
1
go.mod
1
go.mod
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@ -7,6 +7,7 @@ module github.com/wneessen/go-mail
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go 1.16
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require (
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github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358
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golang.org/x/crypto v0.29.0
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golang.org/x/text v0.20.0
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)
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2
go.sum
2
go.sum
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@ -1,3 +1,5 @@
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github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
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github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
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github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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52
smtp/auth_ntlm.go
Normal file
52
smtp/auth_ntlm.go
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@ -0,0 +1,52 @@
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// SPDX-FileCopyrightText: Copyright (c) 2024 The go-mail Authors
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//
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// SPDX-License-Identifier: MIT
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package smtp
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import (
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"fmt"
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"github.com/Azure/go-ntlmssp"
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)
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// ErrNTLMChallangeEmpty is returned when the NTLMv2 ChallengeMessage received from the server is empty.
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var ErrNTLMChallangeEmpty = fmt.Errorf("NTLMv2 ChallengeMessage is empty")
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// ntlmAuth represents a NTLM client and satisfies the smtp.Auth interface.
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type ntlmAuth struct {
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domain, password, username, workstation string
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domainNeeded bool
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}
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// NTLMv2Auth creates and returns a new NTLMv2 authentication mechanism with the given
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// username and password.
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func NTLMv2Auth(username, password, workstation string) Auth {
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user, domain, domainNeeded := ntlmssp.GetDomain(username)
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return &ntlmAuth{
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domain: domain,
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password: password,
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username: user,
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workstation: workstation,
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domainNeeded: domainNeeded,
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}
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}
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// Start initializes the NTLMv2 authentication process and returns the algorithm, the negotiation data, and
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// a potential error
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func (a *ntlmAuth) Start(_ *ServerInfo) (string, []byte, error) {
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negotiateMessage, err := ntlmssp.NewNegotiateMessage(a.domain, a.workstation)
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return "NTLM", negotiateMessage, err
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}
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// Next processes the server's challenge and returns the client's response for NTLMv2 authentication.
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func (a *ntlmAuth) Next(fromServer []byte, more bool) ([]byte, error) {
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if more {
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if len(fromServer) == 0 {
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return nil, ErrNTLMChallangeEmpty
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}
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authenticateMessage, err := ntlmssp.ProcessChallenge(fromServer, a.username, a.password, a.domainNeeded)
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return authenticateMessage, err
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}
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return nil, nil
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}
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@ -1462,6 +1462,155 @@ func TestCRAMMD5Auth(t *testing.T) {
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})
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}
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func TestNTLMv2Auth(t *testing.T) {
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var (
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username = "user"
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password = "SecREt01"
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//ntlmHashHex = "CD06CA7C7E10C99B1D33B7485A2ED808" // NT Hash in hex of "SecREt01"
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//target = "DOMAIN"
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domain = "MYDOMAIN"
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workstation = "MYPC"
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//challenge = []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}
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)
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tests := []struct {
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user string
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workstation string
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wantUser string
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wantDomain string
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wantNegotiate []byte
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}{
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{username, "", username, "", []byte{
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0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00,
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0x88, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x28, 0x00, 0x00, 0x00, 0x06, 0x01, 0xb1, 0x1d, 0x00, 0x00, 0x00, 0x0f}},
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{domain + "\\" + username, "", username, domain, []byte{
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0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x10,
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0x88, 0xa0, 0x08, 0x00, 0x08, 0x00, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x30, 0x00, 0x00, 0x00, 0x06, 0x01, 0xb1, 0x1d, 0x00, 0x00, 0x00, 0x0f, 0x4d, 0x59,
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0x44, 0x4f, 0x4d, 0x41, 0x49, 0x4e}},
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{domain + "\\" + username, workstation, username, domain, []byte{
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0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x30,
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0x88, 0xa0, 0x08, 0x00, 0x08, 0x00, 0x28, 0x00, 0x00, 0x00, 0x04, 0x00, 0x04, 0x00,
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0x30, 0x00, 0x00, 0x00, 0x06, 0x01, 0xb1, 0x1d, 0x00, 0x00, 0x00, 0x0f, 0x4d, 0x59,
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0x44, 0x4f, 0x4d, 0x41, 0x49, 0x4e, 0x4d, 0x59, 0x50, 0x43}},
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{username, workstation, username, "", []byte{
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0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x20,
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0x88, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x04, 0x00, 0x04, 0x00,
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0x28, 0x00, 0x00, 0x00, 0x06, 0x01, 0xb1, 0x1d, 0x00, 0x00, 0x00, 0x0f, 0x4d, 0x59,
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0x50, 0x43}},
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}
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t.Run("different user, domain and workstation combinations", func(t *testing.T) {
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for _, tt := range tests {
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t.Run("NTLMv2 init for "+tt.workstation+`\`+tt.user, func(t *testing.T) {
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auth, ok := NTLMv2Auth(tt.user, password, tt.workstation).(*ntlmAuth)
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if !ok {
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t.Fatalf("failed to initialize NTLMv2 authentication")
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}
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if !strings.EqualFold(auth.username, tt.wantUser) {
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t.Errorf("NTLMv2 authentication username failed, expected: %s, got: %s", tt.wantUser, auth.username)
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}
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if !strings.EqualFold(auth.domain, tt.wantDomain) {
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t.Errorf("NTLMv2 authentication domain failed, expected: %s, got: %s", tt.wantDomain, auth.domain)
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}
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method, negotiation, err := auth.Start(nil)
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if err != nil {
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t.Fatalf("failed to start NTLMv2 authentication: %s", err)
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}
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if !strings.EqualFold(method, "NTLM") {
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t.Errorf("NTLMv2 authentication method failed, expected method: NTLM, got: %s", method)
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}
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if !bytes.Equal(negotiation, tt.wantNegotiate) {
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t.Errorf("NTLMv2 authentication negotiation failed, expected: %s, got: %s", tt.wantNegotiate,
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negotiation)
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}
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})
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}
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})
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t.Run("authenticate with NTLMv2 ", func(t *testing.T) {
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auth := NTLMv2Auth("username", "password", "")
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client, err := Dial("127.0.0.1:2525")
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if err != nil {
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t.Fatalf("failed to dial to test server: %s", err)
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}
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t.Cleanup(func() {
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if err = client.Close(); err != nil {
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t.Fatalf("failed to close client: %s", err)
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}
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})
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if err = client.Hello("127.0.0.1"); err != nil {
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t.Errorf("failed to send hello to test server: %s", err)
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}
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if err = client.Auth(auth); err != nil {
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t.Errorf("failed to authenticate with NTLMv2: %s", err)
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}
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/*
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for _, tt := range tests {
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t.Run("NTLMv2 init for "+tt.workstation+`\`+tt.user, func(t *testing.T) {
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_, negotiation, err := auth.Start(nil)
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if err != nil {
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t.Fatalf("failed to start NTLMv2 authentication: %s", err)
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}
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resp, err := auth.Next(challenge, true)
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if err != nil {
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t.Errorf("server challange failed: %s", err)
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}
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_ = negotiation
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t.Log(resp)
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hashBytes, err := hex.DecodeString(ntlmHashHex)
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if err != nil {
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t.Fatalf("failed to hex decode hash: %s", ntlmHashHex)
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}
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clientChallenge := []byte{0xff, 0xff, 0xff, 0x00, 0x11, 0x22, 0x33, 0x44}
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timestamp := []byte{0x00, 0x90, 0xd3, 0x36, 0xb7, 0x34, 0xc3, 0x01}
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targetInfo := []byte{0x02, 0x00, 0x0c, 0x00, 0x44, 0x00, 0x4f, 0x00, 0x4d, 0x00, 0x41, 0x00, 0x49, 0x00, 0x4e, 0x00, 0x01, 0x00, 0x0c, 0x00, 0x53, 0x00, 0x45, 0x00, 0x52, 0x00, 0x56, 0x00, 0x45, 0x00, 0x52, 0x00, 0x04, 0x00, 0x14, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x61, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x2e, 0x00, 0x63, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x03, 0x00, 0x22, 0x00, 0x73, 0x00, 0x65, 0x00, 0x72, 0x00, 0x76, 0x00, 0x65, 0x00, 0x72, 0x00, 0x2e, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x61, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x2e, 0x00, 0x63, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x00, 0x00, 0x00, 0x00}
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mac := hmac.New(md5.New, hashBytes)
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uints := utf16.Encode([]rune(strings.ToUpper(username) + target))
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buf := bytes.NewBuffer(nil)
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if err = binary.Write(buf, binary.LittleEndian, &uints); err != nil {
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t.Fatalf("failed to convert username to utf16: %s", err)
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}
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mac.Write(buf.Bytes())
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ntlmhash := mac.Sum(nil)
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temp := []byte{1, 1, 0, 0, 0, 0, 0, 0}
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temp = append(temp, timestamp...)
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temp = append(temp, clientChallenge...)
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temp = append(temp, 0, 0, 0, 0)
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temp = append(temp, targetInfo...)
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temp = append(temp, 0, 0, 0, 0)
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mac = hmac.New(md5.New, ntlmhash)
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mac.Write(challenge)
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mac.Write(temp)
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proofString := mac.Sum(nil)
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proofString = append(proofString, temp...)
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expected := []byte{
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0xcb, 0xab, 0xbc, 0xa7, 0x13, 0xeb, 0x79, 0x5d, 0x04, 0xc9, 0x7a, 0xbc, 0x01, 0xee, 0x49, 0x83,
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0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x90, 0xd3, 0x36, 0xb7, 0x34, 0xc3, 0x01,
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0xff, 0xff, 0xff, 0x00, 0x11, 0x22, 0x33, 0x44, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x0c, 0x00,
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0x44, 0x00, 0x4f, 0x00, 0x4d, 0x00, 0x41, 0x00, 0x49, 0x00, 0x4e, 0x00, 0x01, 0x00, 0x0c, 0x00,
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0x53, 0x00, 0x45, 0x00, 0x52, 0x00, 0x56, 0x00, 0x45, 0x00, 0x52, 0x00, 0x04, 0x00, 0x14, 0x00,
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0x64, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x61, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x2e, 0x00, 0x63, 0x00,
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0x6f, 0x00, 0x6d, 0x00, 0x03, 0x00, 0x22, 0x00, 0x73, 0x00, 0x65, 0x00, 0x72, 0x00, 0x76, 0x00,
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0x65, 0x00, 0x72, 0x00, 0x2e, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x61, 0x00, 0x69, 0x00,
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0x6e, 0x00, 0x2e, 0x00, 0x63, 0x00, 0x6f, 0x00, 0x6d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00,
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}
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if !bytes.Equal(expected, proofString) {
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t.Errorf("failed to match expected %x, %x", expected, proofString)
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}
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})
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}
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*/
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})
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}
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func TestNewClient(t *testing.T) {
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t.Run("new client via Dial succeeds", func(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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