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