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// Copyright 2015 Light Code Labs, LLC
//
// Licensed 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 basicauth
import (
"strings"
"github.com/caddyserver/caddy"
"github.com/caddyserver/caddy/caddyhttp/httpserver"
)
func init() {
caddy.RegisterPlugin("basicauth", caddy.Plugin{
ServerType: "http",
Action: setup,
})
}
// setup configures a new BasicAuth middleware instance.
func setup(c *caddy.Controller) error {
cfg := httpserver.GetConfig(c)
root := cfg.Root
rules, err := basicAuthParse(c)
if err != nil {
return err
}
basic := BasicAuth{Rules: rules}
cfg.AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
basic.Next = next
basic.SiteRoot = root
return basic
})
return nil
}
func basicAuthParse(c *caddy.Controller) ([]Rule, error) {
var rules []Rule
cfg := httpserver.GetConfig(c)
var err error
for c.Next() {
var rule Rule
args := c.RemainingArgs()
switch len(args) {
case 2:
rule.Username = args[0]
if rule.Password, err = passwordMatcher(rule.Username, args[1], cfg.Root); err != nil {
return rules, c.Errf("Get password matcher from %s: %v", c.Val(), err)
}
case 3:
rule.Resources = append(rule.Resources, args[0])
rule.Username = args[1]
if rule.Password, err = passwordMatcher(rule.Username, args[2], cfg.Root); err != nil {
return rules, c.Errf("Get password matcher from %s: %v", c.Val(), err)
}
default:
return rules, c.ArgErr()
}
// If nested block is present, process it here
for c.NextBlock() {
val := c.Val()
args = c.RemainingArgs()
switch len(args) {
case 0:
// Assume single argument is path resource
rule.Resources = append(rule.Resources, val)
case 1:
if val == "realm" {
if rule.Realm == "" {
rule.Realm = strings.Replace(args[0], `"`, `\"`, -1)
} else {
return rules, c.Errf("\"realm\" subdirective can only be specified once")
}
} else {
return rules, c.Errf("expecting \"realm\", got \"%s\"", val)
}
default:
return rules, c.ArgErr()
}
}
rules = append(rules, rule)
}
return rules, nil
}
func passwordMatcher(username, passw, siteRoot string) (PasswordMatcher, error) {
htpasswdPrefix := "htpasswd="
if !strings.HasPrefix(passw, htpasswdPrefix) {
return PlainMatcher(passw), nil
}
return GetHtpasswdMatcher(passw[len(htpasswdPrefix):], username, siteRoot)
}
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