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96 lines
2.6 KiB
C
96 lines
2.6 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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#include "libbb.h"
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//usage:#define chpasswd_trivial_usage
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//usage: IF_LONG_OPTS("[--md5|--encrypted]") IF_NOT_LONG_OPTS("[-m|-e]")
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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: IF_LONG_OPTS(
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//usage: "\n -e,--encrypted Supplied passwords are in encrypted form"
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//usage: "\n -m,--md5 Use MD5 encryption instead of DES"
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//usage: )
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//usage: IF_NOT_LONG_OPTS(
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//usage: "\n -e Supplied passwords are in encrypted form"
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//usage: "\n -m Use MD5 encryption instead of DES"
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//usage: )
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//TODO: implement -c ALGO
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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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;
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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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int opt;
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if (getuid() != 0)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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opt_complementary = "m--e:e--m";
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IF_LONG_OPTS(applet_long_options = chpasswd_longopts;)
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opt = getopt32(argv, "em");
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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_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[sizeof("$N$XXXXXXXX")];
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crypt_make_salt(salt, 1);
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if (opt & OPT_MD5) {
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salt[0] = '$';
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salt[1] = '1';
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salt[2] = '$';
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crypt_make_salt(salt + 3, 4);
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}
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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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