LDAP authentification backend

auth/auth.go

@@ -1,11 +1,33 @@
 package auth
 
 import (
+	"errors"
+
 	"gitlab.crans.org/nounous/ghostream/auth/ldap"
 )
 
-// Options holds web package configuration
+// Options holds package configuration
 type Options struct {
 	Backend string
 	LDAP    ldap.Options
 }
+
+// Backend to log user in
+type Backend interface {
+	Login(string, string) (bool, error)
+}
+
+// New initialize authentification backend
+func New(cfg *Options) (Backend, error) {
+	var backend Backend
+
+	if cfg.Backend == "LDAP" {
+		backend = ldap.LDAP{Cfg: cfg.LDAP}
+	} else {
+		// Package is misconfigured
+		return nil, errors.New("Authentification backend not found")
+	}
+
+	// Init and return backend
+	return backend, nil
+}

auth/ldap/ldap.go

@@ -1,7 +1,36 @@
 package ldap
 
-// Options holds web package configuration
+import (
+	"github.com/go-ldap/ldap/v3"
+)
+
+// Options holds package configuration
 type Options struct {
 	URI    string
 	UserDn string
 }
+
+// LDAP authentification backend
+type LDAP struct {
+	Cfg Options
+}
+
+// Login tries to bind to LDAP
+// Returns (true, nil) if success
+func (a LDAP) Login(username string, password string) (bool, error) {
+	// Connect to LDAP server
+	l, err := ldap.DialURL(a.Cfg.URI)
+	if err != nil {
+		return false, err
+	}
+	defer l.Close()
+
+	// Try to bind as user
+	err = l.Bind("cn=username,dc=example,dc=com", password)
+	if err != nil {
+		return false, err
+	}
+
+	// Login succeeded
+	return true, nil
+}

go.mod

@@ -3,6 +3,7 @@ module gitlab.crans.org/nounous/ghostream
 go 1.13
 
 require (
+	github.com/go-ldap/ldap/v3 v3.2.3
 	github.com/prometheus/client_golang v1.7.1
 	github.com/spf13/viper v1.7.1
 	honnef.co/go/tools v0.0.1-2019.2.3

go.sum

@@ -11,6 +11,8 @@ cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqCl
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c h1:/IBSNwUN8+eKzUzbJPqhK839ygXJ82sde8x3ogr6R28=
+github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
@@ -47,9 +49,14 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-asn1-ber/asn1-ber v1.5.1 h1:pDbRAunXzIUXfx4CB2QJFv5IuPiuoW+sWvr/Us009o8=
+github.com/go-asn1-ber/asn1-ber v1.5.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-ldap/ldap v3.0.3+incompatible h1:HTeSZO8hWMS1Rgb2Ziku6b8a7qRIZZMHjsvuZyatzwk=
+github.com/go-ldap/ldap/v3 v3.2.3 h1:FBt+5w3q/vPVPb4eYMQSn+pOiz4zewPamYhlGMmc7yM=
+github.com/go-ldap/ldap/v3 v3.2.3/go.mod h1:iYS1MdmrmceOJ1QOTnRXrIs7i3kloqtmGQjRvjKpyMg=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
@@ -215,6 +222,8 @@ golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9 h1:vEg9joUBmeBcK9iSJftGNf3coIG4HqZElCPehJsfAYM=
+golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=

main.go

@@ -61,6 +61,9 @@ func main() {
 		log.Fatalln("Failed to load settings", err)
 	}
 
+	// Init authentification
+	//authBackend := auth.New(&cfg.Auth)
+
 	// Start web server routine
 	go func() {
 		web.ServeHTTP(&cfg.Web)