110 lines
3.1 KiB
Go
110 lines
3.1 KiB
Go
package middlewares
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import (
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"fmt"
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"net/http"
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"strings"
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"github.com/abbot/go-http-auth"
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"github.com/codegangsta/negroni"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/types"
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)
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// Authenticator is a middleware that provides HTTP basic and digest authentication
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type Authenticator struct {
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handler negroni.Handler
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users map[string]string
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}
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// NewAuthenticator builds a new Autenticator given a config
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func NewAuthenticator(authConfig *types.Auth) (*Authenticator, error) {
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if authConfig == nil {
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return nil, fmt.Errorf("Error creating Authenticator: auth is nil")
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}
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var err error
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authenticator := Authenticator{}
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if authConfig.Basic != nil {
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authenticator.users, err = parserBasicUsers(authConfig.Basic.Users)
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if err != nil {
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return nil, err
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}
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basicAuth := auth.NewBasicAuthenticator("traefik", authenticator.secretBasic)
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authenticator.handler = negroni.HandlerFunc(func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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if username := basicAuth.CheckAuth(r); username == "" {
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log.Debugf("Basic auth failed...")
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basicAuth.RequireAuth(w, r)
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} else {
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log.Debugf("Basic auth success...")
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if authConfig.HeaderField != "" {
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r.Header[authConfig.HeaderField] = []string{username}
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}
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next.ServeHTTP(w, r)
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}
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})
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} else if authConfig.Digest != nil {
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authenticator.users, err = parserDigestUsers(authConfig.Digest.Users)
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if err != nil {
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return nil, err
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}
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digestAuth := auth.NewDigestAuthenticator("traefik", authenticator.secretDigest)
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authenticator.handler = negroni.HandlerFunc(func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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if username, _ := digestAuth.CheckAuth(r); username == "" {
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log.Debugf("Digest auth failed...")
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digestAuth.RequireAuth(w, r)
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} else {
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log.Debugf("Digest auth success...")
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if authConfig.HeaderField != "" {
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r.Header[authConfig.HeaderField] = []string{username}
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}
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next.ServeHTTP(w, r)
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}
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})
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}
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return &authenticator, nil
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}
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func parserBasicUsers(users types.Users) (map[string]string, error) {
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userMap := make(map[string]string)
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for _, user := range users {
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split := strings.Split(user, ":")
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if len(split) != 2 {
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return nil, fmt.Errorf("Error parsing Authenticator user: %v", user)
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}
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userMap[split[0]] = split[1]
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}
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return userMap, nil
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}
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func parserDigestUsers(users types.Users) (map[string]string, error) {
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userMap := make(map[string]string)
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for _, user := range users {
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split := strings.Split(user, ":")
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if len(split) != 3 {
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return nil, fmt.Errorf("Error parsing Authenticator user: %v", user)
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}
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userMap[split[0]+":"+split[1]] = split[2]
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}
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return userMap, nil
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}
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func (a *Authenticator) secretBasic(user, realm string) string {
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if secret, ok := a.users[user]; ok {
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return secret
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}
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log.Debugf("User not found: %s", user)
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return ""
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}
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func (a *Authenticator) secretDigest(user, realm string) string {
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if secret, ok := a.users[user+":"+realm]; ok {
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return secret
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}
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log.Debugf("User not found: %s:%s", user, realm)
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return ""
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}
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func (a *Authenticator) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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a.handler.ServeHTTP(rw, r, next)
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}
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