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// Copyright 2015 Matthew Holt and The Caddy Authors
//
// 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 caddyauth
import (
"encoding/base64"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig"
"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
)
func init() {
httpcaddyfile.RegisterHandlerDirective("basicauth", parseCaddyfile)
}
// parseCaddyfile sets up the handler from Caddyfile tokens. Syntax:
//
// basicauth [<matcher>] [<hash_algorithm>] {
// <username> <hashed_password_base64> [<salt_base64>]
// ...
// }
//
// If no hash algorithm is supplied, bcrypt will be assumed.
func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
var ba HTTPBasicAuth
for h.Next() {
var cmp Comparer
args := h.RemainingArgs()
var hashName string
switch len(args) {
case 0:
hashName = "bcrypt"
case 1:
hashName = args[0]
default:
return nil, h.ArgErr()
}
switch hashName {
case "bcrypt":
cmp = BcryptHash{}
case "scrypt":
cmp = ScryptHash{}
default:
return nil, h.Errf("unrecognized hash algorithm: %s", hashName)
}
ba.HashRaw = caddyconfig.JSONModuleObject(cmp, "algorithm", hashName, nil)
for h.NextBlock(0) {
username := h.Val()
var b64Pwd, b64Salt string
h.Args(&b64Pwd, &b64Salt)
if h.NextArg() {
return nil, h.ArgErr()
}
if username == "" || b64Pwd == "" {
return nil, h.Err("username and password cannot be empty or missing")
}
pwd, err := base64.StdEncoding.DecodeString(b64Pwd)
if err != nil {
return nil, h.Errf("decoding password: %v", err)
}
var salt []byte
if b64Salt != "" {
salt, err = base64.StdEncoding.DecodeString(b64Salt)
if err != nil {
return nil, h.Errf("decoding salt: %v", err)
}
}
ba.AccountList = append(ba.AccountList, Account{
Username: username,
Password: pwd,
Salt: salt,
})
}
}
return Authentication{
ProvidersRaw: caddy.ModuleMap{
"http_basic": caddyconfig.JSON(ba, nil),
},
}, nil
}
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