4e30c67fa0
function old new delta .rodata 170689 170724 +35 packed_usage 32850 32876 +26 chpasswd_main 411 436 +25 chpasswd_longopts 34 41 +7 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/0 up/down: 93/0) Total: 93 bytes Signed-off-by: Jon Kolb <kolbyjack@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
124 lines
3.6 KiB
C
124 lines
3.6 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* chpasswd.c
|
|
*
|
|
* Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org>
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
//config:config CHPASSWD
|
|
//config: bool "chpasswd (18 kb)"
|
|
//config: default y
|
|
//config: help
|
|
//config: Reads a file of user name and password pairs from standard input
|
|
//config: and uses this information to update a group of existing users.
|
|
//config:
|
|
//config:config FEATURE_DEFAULT_PASSWD_ALGO
|
|
//config: string "Default encryption method (passwd -a, cryptpw -m, chpasswd -c ALG)"
|
|
//config: default "des"
|
|
//config: depends on PASSWD || CRYPTPW || CHPASSWD
|
|
//config: help
|
|
//config: Possible choices are "d[es]", "m[d5]", "s[ha256]" or "sha512".
|
|
|
|
//applet:IF_CHPASSWD(APPLET(chpasswd, BB_DIR_USR_SBIN, BB_SUID_DROP))
|
|
|
|
//kbuild:lib-$(CONFIG_CHPASSWD) += chpasswd.o
|
|
|
|
//usage:#define chpasswd_trivial_usage
|
|
//usage: IF_LONG_OPTS("[--md5|--encrypted|--crypt-method|--root]") IF_NOT_LONG_OPTS("[-m|-e|-c|-R]")
|
|
//usage:#define chpasswd_full_usage "\n\n"
|
|
//usage: "Read user:password from stdin and update /etc/passwd\n"
|
|
//usage: IF_LONG_OPTS(
|
|
//usage: "\n -e,--encrypted Supplied passwords are in encrypted form"
|
|
//usage: "\n -m,--md5 Encrypt using md5, not des"
|
|
//usage: "\n -c,--crypt-method ALG "CRYPT_METHODS_HELP_STR
|
|
//usage: "\n -R,--root DIR Directory to chroot into"
|
|
//usage: )
|
|
//usage: IF_NOT_LONG_OPTS(
|
|
//usage: "\n -e Supplied passwords are in encrypted form"
|
|
//usage: "\n -m Encrypt using md5, not des"
|
|
//usage: "\n -c ALG "CRYPT_METHODS_HELP_STR
|
|
//usage: "\n -R DIR Directory to chroot into"
|
|
//usage: )
|
|
|
|
#include "libbb.h"
|
|
|
|
#if ENABLE_LONG_OPTS
|
|
static const char chpasswd_longopts[] ALIGN1 =
|
|
"encrypted\0" No_argument "e"
|
|
"md5\0" No_argument "m"
|
|
"crypt-method\0" Required_argument "c"
|
|
"root\0" Required_argument "R"
|
|
;
|
|
#endif
|
|
|
|
#define OPT_ENC 1
|
|
#define OPT_MD5 2
|
|
|
|
int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int chpasswd_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
char *name;
|
|
const char *algo = CONFIG_FEATURE_DEFAULT_PASSWD_ALGO;
|
|
const char *root = NULL;
|
|
int opt;
|
|
|
|
if (getuid() != 0)
|
|
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
|
|
|
|
opt = getopt32long(argv, "^" "emc:R:" "\0" "m--ec:e--mc:c--em",
|
|
chpasswd_longopts,
|
|
&algo, &root
|
|
);
|
|
|
|
if (root) {
|
|
xchroot(root);
|
|
}
|
|
|
|
while ((name = xmalloc_fgetline(stdin)) != NULL) {
|
|
char *free_me;
|
|
char *pass;
|
|
int rc;
|
|
|
|
pass = strchr(name, ':');
|
|
if (!pass)
|
|
bb_error_msg_and_die("missing new password");
|
|
*pass++ = '\0';
|
|
|
|
xuname2uid(name); /* dies if there is no such user */
|
|
|
|
free_me = NULL;
|
|
if (!(opt & OPT_ENC)) {
|
|
char salt[MAX_PW_SALT_LEN];
|
|
|
|
if (opt & OPT_MD5) {
|
|
/* Force MD5 if the -m flag is set */
|
|
algo = "md5";
|
|
}
|
|
|
|
crypt_make_pw_salt(salt, algo);
|
|
free_me = pass = pw_encrypt(pass, salt, 0);
|
|
}
|
|
|
|
/* This is rather complex: if user is not found in /etc/shadow,
|
|
* we try to find & change his passwd in /etc/passwd */
|
|
#if ENABLE_FEATURE_SHADOWPASSWDS
|
|
rc = update_passwd(bb_path_shadow_file, name, pass, NULL);
|
|
if (rc > 0) /* password in /etc/shadow was updated */
|
|
pass = (char*)"x";
|
|
if (rc >= 0)
|
|
/* 0 = /etc/shadow missing (not an error), >0 = passwd changed in /etc/shadow */
|
|
#endif
|
|
rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
|
|
/* LOGMODE_BOTH logs to syslog also */
|
|
logmode = LOGMODE_BOTH;
|
|
if (rc < 0)
|
|
bb_error_msg_and_die("an error occurred updating password for %s", name);
|
|
if (rc)
|
|
bb_error_msg("password for '%s' changed", name);
|
|
logmode = LOGMODE_STDIO;
|
|
free(name);
|
|
free(free_me);
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|