| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2007 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 18 | * USA |
| 19 | */ |
| 20 | /** @file server/setup.c |
| 21 | * @brief Automated setup functions |
| 22 | */ |
| 23 | |
| 24 | #include <config.h> |
| 25 | #include "types.h" |
| 26 | |
| 27 | #include <unistd.h> |
| 28 | #include <fcntl.h> |
| 29 | #include <gcrypt.h> |
| 30 | #include <pwd.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <errno.h> |
| 34 | #include <stdio.h> |
| 35 | |
| 36 | #include "log.h" |
| 37 | #include "mem.h" |
| 38 | #include "printf.h" |
| 39 | #include "configuration.h" |
| 40 | #include "setup.h" |
| 41 | #include "hex.h" |
| 42 | #include "defs.h" |
| 43 | |
| 44 | /** @brief Create config.private with a login for root */ |
| 45 | void make_root_login(void) { |
| 46 | struct stat sb; |
| 47 | char *privconfig, *privconfignew; |
| 48 | int fd; |
| 49 | FILE *fp; |
| 50 | struct passwd *pw; |
| 51 | uint8_t pwbin[10]; |
| 52 | char *pwhex; |
| 53 | |
| 54 | if(config->user) { |
| 55 | if(!(pw = getpwnam(config->user))) |
| 56 | fatal(0, "cannot find user %s", config->user); |
| 57 | } else |
| 58 | pw = 0; |
| 59 | /* Compute filenames */ |
| 60 | byte_xasprintf(&privconfig, "%s/config.private", pkgconfdir); |
| 61 | byte_xasprintf(&privconfignew, "%s/config.private.new", pkgconfdir); |
| 62 | /* If config.private already exists don't overwrite it */ |
| 63 | if(stat(privconfig, &sb) == 0) |
| 64 | return; |
| 65 | /* Choose a new root password */ |
| 66 | gcry_randomize(pwbin, sizeof pwbin, GCRY_STRONG_RANDOM); |
| 67 | pwhex = hex(pwbin, sizeof pwbin); |
| 68 | /* Create the file */ |
| 69 | if((fd = open(privconfignew, O_WRONLY|O_CREAT, 0600)) < 0) { |
| 70 | error(errno, "error creating %s", privconfignew); |
| 71 | return; /* not fatal! */ |
| 72 | } |
| 73 | /* Fix permissions */ |
| 74 | if(pw) { |
| 75 | if(fchown(fd, 0, pw->pw_gid) < 0) |
| 76 | fatal(errno, "error setting owner/group for %s", privconfignew); |
| 77 | if(fchmod(fd, 0640) < 0) |
| 78 | fatal(errno, "error setting permissions for %s", privconfignew); |
| 79 | } |
| 80 | /* Write the required 'allow' line */ |
| 81 | if(!(fp = fdopen(fd, "w"))) |
| 82 | fatal(errno, "fdopen"); |
| 83 | if(fprintf(fp, "allow root %s\n", pwhex) < 0 |
| 84 | || fclose(fp) < 0) |
| 85 | fatal(errno, "error writing %s", privconfignew); |
| 86 | /* Rename into place */ |
| 87 | if(rename(privconfignew, privconfig) < 0) |
| 88 | fatal(errno, "error renaming %s", privconfignew); |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | Local Variables: |
| 93 | c-basic-offset:2 |
| 94 | comment-column:40 |
| 95 | fill-column:79 |
| 96 | indent-tabs-mode:nil |
| 97 | End: |
| 98 | */ |