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basic.go
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basic.go
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/*
* Copyright (C) 2016 Red Hat, Inc.
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package http
import (
"encoding/base64"
"net/http"
"os"
"github.com/abbot/go-http-auth"
"github.com/gorilla/context"
"github.com/connetos/anywatch/config"
)
const (
basicAuthRealm string = "Skydive Authentication"
)
type BasicAuthenticationBackend struct {
*auth.BasicAuth
}
func (b *BasicAuthenticationBackend) Authenticate(username string, password string) (string, error) {
request := &http.Request{Header: make(map[string][]string)}
creds := base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
request.Header.Set("Authorization", "Basic "+creds)
if username := b.CheckAuth(request); username == "" {
return "", ErrWrongCredentials
}
return creds, nil
}
func (b *BasicAuthenticationBackend) Wrap(wrapped auth.AuthenticatedHandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
setTLSHeader(w, r)
cookie, err := r.Cookie("authtok")
if err == nil {
r.Header.Set("Authorization", "Basic "+cookie.Value)
}
if username := b.CheckAuth(r); username == "" {
unauthorized(w, r)
} else {
ar := &auth.AuthenticatedRequest{Request: *r, Username: username}
copyRequestVars(r, &ar.Request)
wrapped(w, ar)
context.Clear(&ar.Request)
}
}
}
func NewBasicAuthenticationBackend(file string) (*BasicAuthenticationBackend, error) {
if _, err := os.Stat(file); err != nil {
return nil, err
}
// TODO(safchain) add more providers
h := auth.HtpasswdFileProvider(file)
return &BasicAuthenticationBackend{
auth.NewBasicAuthenticator(basicAuthRealm, h),
}, nil
}
func NewBasicAuthenticationBackendFromConfig() (*BasicAuthenticationBackend, error) {
f := config.GetConfig().GetString("auth.basic.file")
return NewBasicAuthenticationBackend(f)
}