1/* vi: set sw=4 ts=4: */ 2/* 3 * chpasswd.c 4 * 5 * Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org> 6 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 7 */ 8#include "libbb.h" 9 10#if ENABLE_LONG_OPTS 11static const char chpasswd_longopts[] ALIGN1 = 12 "encrypted\0" No_argument "e" 13 "md5\0" No_argument "m" 14 ; 15#endif 16 17#define OPT_ENC 1 18#define OPT_MD5 2 19 20int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 21int chpasswd_main(int argc UNUSED_PARAM, char **argv) 22{ 23 char *name, *pass; 24 char salt[sizeof("$N$XXXXXXXX")]; 25 int opt, rc; 26 int rnd = rnd; /* we *want* it to be non-initialized! */ 27 28 if (getuid()) 29 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); 30 31 opt_complementary = "m--e:e--m"; 32 IF_LONG_OPTS(applet_long_options = chpasswd_longopts;) 33 opt = getopt32(argv, "em"); 34 35 while ((name = xmalloc_fgetline(stdin)) != NULL) { 36 pass = strchr(name, ':'); 37 if (!pass) 38 bb_error_msg_and_die("missing new password"); 39 *pass++ = '\0'; 40 41 xuname2uid(name); /* dies if there is no such user */ 42 43 if (!(opt & OPT_ENC)) { 44 rnd = crypt_make_salt(salt, 1, rnd); 45 if (opt & OPT_MD5) { 46 strcpy(salt, "$1$"); 47 rnd = crypt_make_salt(salt + 3, 4, rnd); 48 } 49 pass = pw_encrypt(pass, salt, 0); 50 } 51 52 /* This is rather complex: if user is not found in /etc/shadow, 53 * we try to find & change his passwd in /etc/passwd */ 54#if ENABLE_FEATURE_SHADOWPASSWDS 55 rc = update_passwd(bb_path_shadow_file, name, pass, NULL); 56 if (rc == 0) /* no lines updated, no errors detected */ 57#endif 58 rc = update_passwd(bb_path_passwd_file, name, pass, NULL); 59 /* LOGMODE_BOTH logs to syslog also */ 60 logmode = LOGMODE_BOTH; 61 if (rc < 0) 62 bb_error_msg_and_die("an error occurred updating password for %s", name); 63 if (rc) 64 bb_info_msg("Password for '%s' changed", name); 65 logmode = LOGMODE_STDIO; 66 free(name); 67 if (!(opt & OPT_ENC)) 68 free(pass); 69 } 70 return EXIT_SUCCESS; 71} 72