auth.c

   1 /*
   2  * uhttpd - Tiny single-threaded httpd
   3  *
   4  *   Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
   5  *   Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   6  *
   7  *  Licensed under the Apache License, Version 2.0 (the "License");
   8  *  you may not use this file except in compliance with the License.
   9  *  You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  *  Unless required by applicable law or agreed to in writing, software
  14  *  distributed under the License is distributed on an "AS IS" BASIS,
  15  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  *  See the License for the specific language governing permissions and
  17  *  limitations under the License.
  18  */
  19
  20 #include "uhttpd.h"
  21
  22 static LIST_HEAD(auth_realms);
  23
  24 void uh_auth_add(const char *path, const char *user, const char *pass)
  25 {
  26         struct auth_realm *new = NULL;
  27         struct passwd *pwd;
  28         const char *new_pass = NULL;
  29         char *dest_path, *dest_user, *dest_pass;
  30
  31 #ifdef HAVE_SHADOW
  32         struct spwd *spwd;
  33 #endif
  34
  35         /* given password refers to a passwd entry */
  36         if ((strlen(pass) > 3) && !strncmp(pass, "$p$", 3)) {
  37 #ifdef HAVE_SHADOW
  38                 /* try to resolve shadow entry */
  39                 spwd = getspnam(&pass[3]);
  40                 if (spwd)
  41                         new_pass = spwd->sp_pwdp;
  42 #endif
  43                 if (!new_pass) {
  44                         pwd = getpwnam(&pass[3]);
  45                         if (pwd && pwd->pw_passwd && pwd->pw_passwd[0] &&
  46                             pwd->pw_passwd[0] != '!')
  47                                 new_pass = pwd->pw_passwd;
  48                 }
  49         } else {
  50                 new_pass = pass;
  51         }
  52
  53         if (!new_pass || !new_pass[0])
  54                 return;
  55
  56         new = calloc_a(sizeof(*new),
  57                 &dest_path, strlen(path) + 1,
  58                 &dest_user, strlen(user) + 1,
  59                 &dest_pass, strlen(new_pass) + 1);
  60
  61         if (!new)
  62                 return;
  63
  64         new->path = strcpy(dest_path, path);
  65         new->user = strcpy(dest_user, user);
  66         new->pass = strcpy(dest_pass, new_pass);
  67         list_add(&new->list, &auth_realms);
  68 }