caba1a16ec
function old new delta packed_usage 33650 33605 -45 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* chpasswd.c
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*
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* Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org>
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config CHPASSWD
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//config: bool "chpasswd (18 kb)"
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//config: default y
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//config: help
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//config: Reads a file of user name and password pairs from standard input
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//config: and uses this information to update a group of existing users.
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//config:
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//config:config FEATURE_DEFAULT_PASSWD_ALGO
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//config: string "Default encryption method (passwd -a, cryptpw -m, chpasswd -c ALG)"
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//config: default "des"
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//config: depends on PASSWD || CRYPTPW || CHPASSWD
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//config: help
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//config: Possible choices are "d[es]", "m[d5]", "s[ha256]" or "sha512".
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//applet:IF_CHPASSWD(APPLET(chpasswd, BB_DIR_USR_SBIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_CHPASSWD) += chpasswd.o
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//usage:#define chpasswd_trivial_usage
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//usage: "[-me] [-c ALG] [-R DIR]"
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//usage:#define chpasswd_full_usage "\n\n"
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//usage: "Read user:password from stdin and update /etc/passwd\n"
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//usage: "\n -e Supplied passwords are in encrypted form"
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//usage: "\n -m Encrypt using md5, not des"
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//usage: "\n -c ALG "CRYPT_METHODS_HELP_STR
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//usage: "\n -R DIR Directory to chroot into"
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#include "libbb.h"
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#if ENABLE_LONG_OPTS
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static const char chpasswd_longopts[] ALIGN1 =
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"encrypted\0" No_argument "e"
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"md5\0" No_argument "m"
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"crypt-method\0" Required_argument "c"
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"root\0" Required_argument "R"
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;
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#endif
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#define OPT_ENC 1
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#define OPT_MD5 2
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int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int chpasswd_main(int argc UNUSED_PARAM, char **argv)
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{
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char *name;
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const char *algo = CONFIG_FEATURE_DEFAULT_PASSWD_ALGO;
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const char *root = NULL;
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int opt;
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if (getuid() != 0)
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bb_simple_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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opt = getopt32long(argv, "^" "emc:R:" "\0" "m--ec:e--mc:c--em",
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chpasswd_longopts,
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&algo, &root
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);
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if (root) {
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xchroot(root);
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}
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while ((name = xmalloc_fgetline(stdin)) != NULL) {
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char *free_me;
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char *pass;
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int rc;
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pass = strchr(name, ':');
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if (!pass)
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bb_simple_error_msg_and_die("missing new password");
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*pass++ = '\0';
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xuname2uid(name); /* dies if there is no such user */
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free_me = NULL;
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if (!(opt & OPT_ENC)) {
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char salt[MAX_PW_SALT_LEN];
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if (opt & OPT_MD5) {
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/* Force MD5 if the -m flag is set */
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algo = "md5";
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}
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crypt_make_pw_salt(salt, algo);
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free_me = pass = pw_encrypt(pass, salt, 0);
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}
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/* This is rather complex: if user is not found in /etc/shadow,
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* we try to find & change his passwd in /etc/passwd */
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#if ENABLE_FEATURE_SHADOWPASSWDS
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rc = update_passwd(bb_path_shadow_file, name, pass, NULL);
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if (rc > 0) /* password in /etc/shadow was updated */
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pass = (char*)"x";
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if (rc >= 0)
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/* 0 = /etc/shadow missing (not an error), >0 = passwd changed in /etc/shadow */
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#endif
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rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
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/* LOGMODE_BOTH logs to syslog also */
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logmode = LOGMODE_BOTH;
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if (rc < 0)
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bb_error_msg_and_die("an error occurred updating password for %s", name);
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if (rc)
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bb_info_msg("password for '%s' changed", name);
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logmode = LOGMODE_STDIO;
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free(name);
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free(free_me);
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}
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return EXIT_SUCCESS;
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}
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