* src/chage.c: Fix typo: s/maximim/maximum/
* src/chage.c: New function: fail_exit(). Change most of the exit() to a fail_exit, which makes sure the files are unlocked (new global variables: pw_locked, spw_locked), the PAM transaction is ended, and the failure is logged to libaudit (use a global user_name and user_uid for logging). * src/chage.c: Compilation fix for PAM support (pamh needs to be global since the function split). * src/chage.c: Document process_flags(), check_flags(), check_perms(), open_files(), and close_files(). * src/chage.c: Split update_age() and get_defaults() out of main() * src/chage.c: Drop the privileges just after opening the files. * src/chage.c: Do not log to audit only if the user has an entry in the shadow file. * NEWS, src/chage.c (open_files): Also open the password file for writing. This fix chage when the user only has a password entry (and no shadow entries). * src/chage.c (get_defaults): Use default values that don't change the behavior of the account for the fields that are not specified when the user has no shadow entry.
This commit is contained in:
nekral-guest
parent
3b7497b063
commit
db38d0b104
21
ChangeLog
21
ChangeLog
@ -1,3 +1,24 @@
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2007-12-31 Nicolas François <nicolas.francois@centraliens.net>
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* src/chage.c: Fix typo: s/maximim/maximum/
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* src/chage.c: New function: fail_exit(). Change most of the exit()
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to a fail_exit, which makes sure the files are unlocked (new global
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variables: pw_locked, spw_locked), the PAM transaction is ended, and
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the failure is logged to libaudit (use a global user_name and user_uid
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for logging).
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* src/chage.c: Compilation fix for PAM support (pamh needs to be
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global since the function split).
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* src/chage.c: Document process_flags(), check_flags(), check_perms(),
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open_files(), and close_files().
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* src/chage.c: Split update_age() and get_defaults() out of main()
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* src/chage.c: Drop the privileges just after opening the files.
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* src/chage.c: Do not log to audit only if the user has an entry in
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the shadow file.
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* NEWS, src/chage.c (open_files): Also open the password file for
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writing. This fix chage when the user only has a password entry (and
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no shadow entries). Use default values that don't change the behavior
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of the account for the fields that are not specified.
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2007-12-30 Nicolas François <nicolas.francois@centraliens.net>
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* src/groupadd.c: Compilation fix for PAM support (pamh needs to be
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3
NEWS
3
NEWS
@ -32,6 +32,9 @@ shadow-4.1.0 -> shadow-4.1.1 UNRELEASED
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* The new users are no more added to the list of members of their groups
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because the membership is already set by their primary group.
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* Added support for gshadow.
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- chage
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* Fix bug which forbid to set the aging information of an account with a
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passwd entry, but no shadow entry.
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shadow-4.0.18.2 -> shadow-4.1.0 09-12-2008
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456
src/chage.c
456
src/chage.c
@ -63,10 +63,16 @@ static int
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Iflg = 0, /* set password inactive after expiration */
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lflg = 0, /* show account aging information */
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mflg = 0, /* set minimum number of days before password change */
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Mflg = 0, /* set maximim number of days before password change */
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Mflg = 0, /* set maximum number of days before password change */
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Wflg = 0; /* set expiration warning days */
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static int amroot = 0;
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static int pw_locked = 0; /* Indicate if the password file is locked */
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static int spw_locked = 0; /* Indicate if the shadow file is locked */
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/* The name and UID of the user being worked on */
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static char user_name[BUFSIZ] = "";
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static uid_t user_uid = -1;
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static long mindays;
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static long maxdays;
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static long lastday;
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@ -74,6 +80,10 @@ static long warndays;
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static long inactdays;
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static long expdays;
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#ifdef USE_PAM
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static pam_handle_t *pamh = NULL;
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#endif
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#define EPOCH "1969-12-31"
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/* local function prototypes */
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@ -87,6 +97,40 @@ static void check_flags (int argc, int opt_index);
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static void check_perms (void);
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static void open_files (int readonly);
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static void close_files (void);
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static void fail_exit (int code);
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/*
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* fail_exit - do some cleanup and exit with the given error code
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*/
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static void fail_exit (int code)
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{
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if (spw_locked) {
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spw_unlock ();
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}
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if (pw_locked) {
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pw_unlock ();
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}
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closelog ();
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#ifdef WITH_AUDIT
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if (E_SUCCESS != code) {
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
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user_name, user_uid, 0);
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}
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#endif
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#ifdef USE_PAM
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if (NULL != pamh) {
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/* If there is a PAM error, pam_end will be called by the
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* caller.
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* We always end the pam transaction with PAM_SUCCESS here.
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*/
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pam_end (pamh, PAM_SUCCESS);
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}
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#endif
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exit (code);
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}
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/*
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* isnum - determine whether or not a string is a number
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@ -317,6 +361,11 @@ static void list_fields (void)
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warndays);
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}
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/*
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* process_flags - parse the command line options
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*
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* It will not return if an error is encountered.
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*/
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static void process_flags (int argc, char **argv)
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{
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/*
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@ -386,10 +435,13 @@ static void process_flags (int argc, char **argv)
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check_flags (argc, optind);
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}
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/*
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* check_flags - check flags and parameters consistency
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*
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* It will not return if an error is encountered.
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*/
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static void check_flags (int argc, int opt_index)
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{
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/*
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* Make certain the flags do not conflict and that there is a user
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* name on the command line.
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@ -407,11 +459,23 @@ static void check_flags (int argc, int opt_index)
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}
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}
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/* Additional check done later */
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/*
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* check_perms - check if the caller is allowed to add a group
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*
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* Non-root users are only allowed to display their aging information.
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* (we will later make sure that the user is only listing her aging
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* information)
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*
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* With PAM support, the setuid bit can be set on groupadd to allow
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* non-root users to groups.
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* Without PAM support, only users who can write in the group databases
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* can add groups.
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*
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* It will not return if the user is not allowed.
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*/
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static void check_perms (void)
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{
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#ifdef USE_PAM
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pam_handle_t *pamh = NULL;
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struct passwd *pampw;
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int retval;
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#endif
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@ -424,11 +488,7 @@ static void check_perms (void)
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if (!amroot && !lflg) {
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fprintf (stderr, _("%s: Permission denied.\n"), Prog);
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#ifdef WITH_AUDIT
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", NULL,
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getuid (), 0);
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#endif
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exit (E_NOPERM);
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fail_exit (E_NOPERM);
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}
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#ifdef USE_PAM
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@ -459,23 +519,39 @@ static void check_perms (void)
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if (retval != PAM_SUCCESS) {
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fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
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exit (E_NOPERM);
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pamh = NULL;
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fail_exit (E_NOPERM);
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}
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#endif /* USE_PAM */
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}
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/*
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* open_files - open the shadow database
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*
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* The password database is also needed (only for reading).
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* In read-only mode, the shadow database is not locked and is opened
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* only for reading.
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*/
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static void open_files (int readonly)
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{
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/*
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* open the password file. This loads all of the password
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* Lock and open the password file. This loads all of the password
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* file entries into memory. Then we get a pointer to the password
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* file entry for the requested user.
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*/
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if (pw_open (O_RDONLY) == 0) {
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if (!readonly && (pw_lock () == 0)) {
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fprintf (stderr,
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_("%s: can't lock password file\n"), Prog);
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SYSLOG ((LOG_ERR, "failed locking %s", PASSWD_FILE));
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fail_exit (E_NOPERM);
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}
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if (!readonly) {
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pw_locked = 1;
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}
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if (pw_open (readonly ? O_RDONLY: O_RDWR) == 0) {
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fprintf (stderr, _("%s: can't open password file\n"), Prog);
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SYSLOG ((LOG_ERR, "failed opening %s", PASSWD_FILE));
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closelog ();
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exit (E_NOPERM);
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fail_exit (E_NOPERM);
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}
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/*
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@ -488,27 +564,22 @@ static void open_files (int readonly)
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fprintf (stderr,
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_("%s: can't lock shadow password file\n"), Prog);
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SYSLOG ((LOG_ERR, "failed locking %s", SHADOW_FILE));
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closelog ();
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#ifdef WITH_AUDIT
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", name,
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getuid (), 0);
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#endif
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exit (E_NOPERM);
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fail_exit (E_NOPERM);
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}
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if (!readonly) {
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spw_locked = 1;
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}
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if (spw_open (readonly ? O_RDONLY: O_RDWR) == 0) {
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fprintf (stderr,
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_("%s: can't open shadow password file\n"), Prog);
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spw_unlock ();
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SYSLOG ((LOG_ERR, "failed opening %s", SHADOW_FILE));
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closelog ();
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#ifdef WITH_AUDIT
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", name,
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getuid (), 0);
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#endif
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exit (E_NOPERM);
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fail_exit (E_NOPERM);
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}
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}
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/*
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* close_files - close and unlock the password/shadow databases
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*/
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static void close_files (void)
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{
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/*
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@ -518,14 +589,8 @@ static void close_files (void)
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if (spw_close () == 0) {
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fprintf (stderr,
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_("%s: can't rewrite shadow password file\n"), Prog);
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spw_unlock ();
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SYSLOG ((LOG_ERR, "failed rewriting %s", SHADOW_FILE));
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closelog ();
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#ifdef WITH_AUDIT
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
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pw->pw_name, getuid (), 0);
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#endif
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exit (E_NOPERM);
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fail_exit (E_NOPERM);
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}
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/*
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@ -534,16 +599,123 @@ static void close_files (void)
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*/
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if (pw_close () == 0) {
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fprintf (stderr, _("%s: can't rewrite password file\n"), Prog);
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spw_unlock ();
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SYSLOG ((LOG_ERR, "failed rewriting %s", PASSWD_FILE));
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closelog ();
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#ifdef WITH_AUDIT
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
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pw->pw_name, getuid (), 0);
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#endif
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exit (E_NOPERM);
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fail_exit (E_NOPERM);
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}
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spw_unlock ();
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spw_locked = 0;
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pw_unlock ();
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pw_locked = 0;
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}
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/*
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* update_age - update the aging information in the database
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*
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* It will not return in case of error
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*/
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static void update_age (const struct spwd *sp, const struct passwd *pw)
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{
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struct spwd spwent;
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/*
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* There was no shadow entry. The new entry will have the encrypted
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* password transferred from the normal password file along with the
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* aging information.
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*/
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if (NULL == sp) {
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struct passwd pwent = *pw;
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memzero (&spwent, sizeof spwent);
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spwent.sp_namp = xstrdup (pw->pw_name);
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spwent.sp_pwdp = xstrdup (pw->pw_passwd);
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spwent.sp_flag = -1;
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pwent.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
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if (pw_update (&pwent) == 0) {
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fprintf (stderr,
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_("%s: can't update password file\n"), Prog);
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SYSLOG ((LOG_ERR, "failed updating %s", PASSWD_FILE));
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fail_exit (E_NOPERM);
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}
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} else {
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spwent.sp_namp = xstrdup (sp->sp_namp);
|
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spwent.sp_pwdp = xstrdup (sp->sp_pwdp);
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spwent.sp_flag = sp->sp_flag;
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy the fields back to the shadow file entry and write the
|
||||
* modified entry back to the shadow file. Closing the shadow and
|
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* password files will commit any changes that have been made.
|
||||
*/
|
||||
spwent.sp_max = maxdays;
|
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spwent.sp_min = mindays;
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spwent.sp_lstchg = lastday;
|
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spwent.sp_warn = warndays;
|
||||
spwent.sp_inact = inactdays;
|
||||
spwent.sp_expire = expdays;
|
||||
|
||||
if (spw_update (&spwent) == 0) {
|
||||
fprintf (stderr,
|
||||
_("%s: can't update shadow password file\n"), Prog);
|
||||
SYSLOG ((LOG_ERR, "failed updating %s", SHADOW_FILE));
|
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fail_exit (E_NOPERM);
|
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}
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* get_defaults - get the value of the fields not set from the command line
|
||||
*/
|
||||
static void get_defaults (const struct spwd *sp)
|
||||
{
|
||||
/*
|
||||
* Set the fields that aren't being set from the command line from
|
||||
* the password file.
|
||||
*/
|
||||
if (NULL != sp) {
|
||||
if (!Mflg) {
|
||||
maxdays = sp->sp_max;
|
||||
}
|
||||
if (!mflg) {
|
||||
mindays = sp->sp_min;
|
||||
}
|
||||
if (!dflg) {
|
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lastday = sp->sp_lstchg;
|
||||
}
|
||||
if (!Wflg) {
|
||||
warndays = sp->sp_warn;
|
||||
}
|
||||
if (!Iflg) {
|
||||
inactdays = sp->sp_inact;
|
||||
}
|
||||
if (!Eflg) {
|
||||
expdays = sp->sp_expire;
|
||||
}
|
||||
} else {
|
||||
/*
|
||||
* Use default values that will not change the behavior of the
|
||||
* account.
|
||||
*/
|
||||
if (!Mflg) {
|
||||
maxdays = -1;
|
||||
}
|
||||
if (!mflg) {
|
||||
mindays = -1;
|
||||
}
|
||||
if (!dflg) {
|
||||
lastday = 0;
|
||||
}
|
||||
if (!Wflg) {
|
||||
warndays = -1;
|
||||
}
|
||||
if (!Iflg) {
|
||||
inactdays = -1;
|
||||
}
|
||||
if (!Eflg) {
|
||||
expdays = -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
@ -570,12 +742,9 @@ static void close_files (void)
|
||||
int main (int argc, char **argv)
|
||||
{
|
||||
const struct spwd *sp;
|
||||
struct spwd spwent;
|
||||
uid_t ruid;
|
||||
gid_t rgid;
|
||||
const struct passwd *pw;
|
||||
struct passwd pwent;
|
||||
char name[BUFSIZ];
|
||||
|
||||
#ifdef WITH_AUDIT
|
||||
audit_help_open ();
|
||||
@ -615,6 +784,12 @@ int main (int argc, char **argv)
|
||||
}
|
||||
|
||||
open_files (lflg);
|
||||
/* Drop privileges */
|
||||
if (lflg && (setregid (rgid, rgid) || setreuid (ruid, ruid))) {
|
||||
fprintf (stderr, _("%s: failed to drop privileges (%s)\n"),
|
||||
Prog, strerror (errno));
|
||||
fail_exit (E_NOPERM);
|
||||
}
|
||||
|
||||
pw = pw_locate (argv[optind]);
|
||||
if (NULL == pw) {
|
||||
@ -624,104 +799,27 @@ int main (int argc, char **argv)
|
||||
exit (E_NOPERM);
|
||||
}
|
||||
|
||||
pwent = *pw;
|
||||
STRFCPY (name, pwent.pw_name);
|
||||
|
||||
/* Drop privileges */
|
||||
if (lflg && (setregid (rgid, rgid) || setreuid (ruid, ruid))) {
|
||||
fprintf (stderr, _("%s: failed to drop privileges (%s)\n"),
|
||||
Prog, strerror (errno));
|
||||
#ifdef WITH_AUDIT
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", name,
|
||||
getuid (), 0);
|
||||
#endif
|
||||
exit (E_NOPERM);
|
||||
}
|
||||
STRFCPY (user_name, pw->pw_name);
|
||||
user_uid = pw->pw_uid;
|
||||
|
||||
sp = spw_locate (argv[optind]);
|
||||
|
||||
/*
|
||||
* Set the fields that aren't being set from the command line from
|
||||
* the password file.
|
||||
*/
|
||||
if (NULL != sp) {
|
||||
spwent = *sp;
|
||||
|
||||
if (!Mflg) {
|
||||
maxdays = spwent.sp_max;
|
||||
}
|
||||
if (!mflg) {
|
||||
mindays = spwent.sp_min;
|
||||
}
|
||||
if (!dflg) {
|
||||
lastday = spwent.sp_lstchg;
|
||||
}
|
||||
if (!Wflg) {
|
||||
warndays = spwent.sp_warn;
|
||||
}
|
||||
if (!Iflg) {
|
||||
inactdays = spwent.sp_inact;
|
||||
}
|
||||
if (!Eflg) {
|
||||
expdays = spwent.sp_expire;
|
||||
}
|
||||
#ifdef WITH_AUDIT
|
||||
if (Mflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change max age", pw->pw_name, pw->pw_uid,
|
||||
1);
|
||||
}
|
||||
if (mflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change min age", pw->pw_name, pw->pw_uid,
|
||||
1);
|
||||
}
|
||||
if (dflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change last change date", pw->pw_name,
|
||||
pw->pw_uid, 1);
|
||||
}
|
||||
if (Wflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change passwd warning", pw->pw_name,
|
||||
pw->pw_uid, 1);
|
||||
}
|
||||
if (Iflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change inactive days", pw->pw_name,
|
||||
pw->pw_uid, 1);
|
||||
}
|
||||
if (Eflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change passwd expiration", pw->pw_name,
|
||||
pw->pw_uid, 1);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
get_defaults(sp);
|
||||
|
||||
/*
|
||||
* Print out the expiration fields if the user has requested the
|
||||
* list option.
|
||||
*/
|
||||
|
||||
if (lflg) {
|
||||
if (!amroot && (ruid != pwent.pw_uid)) {
|
||||
#ifdef WITH_AUDIT
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
|
||||
pw->pw_name, pw->pw_uid, 0);
|
||||
#endif
|
||||
if (!amroot && (ruid != user_uid)) {
|
||||
fprintf (stderr, _("%s: Permission denied.\n"), Prog);
|
||||
closelog ();
|
||||
exit (E_NOPERM);
|
||||
fail_exit (E_NOPERM);
|
||||
}
|
||||
#ifdef WITH_AUDIT
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "display aging info",
|
||||
pw->pw_name, pw->pw_uid, 1);
|
||||
user_name, user_uid, 1);
|
||||
#endif
|
||||
list_fields ();
|
||||
spw_unlock ();
|
||||
closelog ();
|
||||
exit (E_SUCCESS);
|
||||
fail_exit (E_SUCCESS);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -729,82 +827,60 @@ int main (int argc, char **argv)
|
||||
* user interactively change them.
|
||||
*/
|
||||
if (!mflg && !Mflg && !dflg && !Wflg && !Iflg && !Eflg) {
|
||||
printf (_("Changing the aging information for %s\n"), name);
|
||||
printf (_("Changing the aging information for %s\n"),
|
||||
user_name);
|
||||
if (new_fields () == 0) {
|
||||
fprintf (stderr, _("%s: error changing fields\n"),
|
||||
Prog);
|
||||
spw_unlock ();
|
||||
closelog ();
|
||||
#ifdef WITH_AUDIT
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
|
||||
pw->pw_name, getuid (), 0);
|
||||
#endif
|
||||
exit (E_NOPERM);
|
||||
fail_exit (E_NOPERM);
|
||||
}
|
||||
#ifdef WITH_AUDIT
|
||||
else {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change all aging information",
|
||||
pw->pw_name, getuid (), 1);
|
||||
user_name, user_uid, 1);
|
||||
}
|
||||
#endif
|
||||
} else {
|
||||
#ifdef WITH_AUDIT
|
||||
if (Mflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change max age", user_name,
|
||||
user_uid, 1);
|
||||
}
|
||||
if (mflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change min age", user_name,
|
||||
user_uid, 1);
|
||||
}
|
||||
if (dflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change last change date", user_name,
|
||||
user_uid, 1);
|
||||
}
|
||||
if (Wflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change passwd warning", user_name,
|
||||
user_uid, 1);
|
||||
}
|
||||
if (Iflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change inactive days", user_name,
|
||||
user_uid, 1);
|
||||
}
|
||||
if (Eflg) {
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||||
"change passwd expiration", user_name,
|
||||
user_uid, 1);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
/*
|
||||
* There was no shadow entry. The new entry will have the encrypted
|
||||
* password transferred from the normal password file along with the
|
||||
* aging information.
|
||||
*/
|
||||
if (NULL == sp) {
|
||||
sp = &spwent;
|
||||
memzero (&spwent, sizeof spwent);
|
||||
|
||||
spwent.sp_namp = xstrdup (pwent.pw_name);
|
||||
spwent.sp_pwdp = xstrdup (pwent.pw_passwd);
|
||||
spwent.sp_flag = -1;
|
||||
|
||||
pwent.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
|
||||
if (pw_update (&pwent) == 0) {
|
||||
fprintf (stderr,
|
||||
_("%s: can't update password file\n"), Prog);
|
||||
spw_unlock ();
|
||||
SYSLOG ((LOG_ERR, "failed updating %s", PASSWD_FILE));
|
||||
closelog ();
|
||||
#ifdef WITH_AUDIT
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
|
||||
pw->pw_name, getuid (), 0);
|
||||
#endif
|
||||
exit (E_NOPERM);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy the fields back to the shadow file entry and write the
|
||||
* modified entry back to the shadow file. Closing the shadow and
|
||||
* password files will commit any changes that have been made.
|
||||
*/
|
||||
spwent.sp_max = maxdays;
|
||||
spwent.sp_min = mindays;
|
||||
spwent.sp_lstchg = lastday;
|
||||
spwent.sp_warn = warndays;
|
||||
spwent.sp_inact = inactdays;
|
||||
spwent.sp_expire = expdays;
|
||||
|
||||
if (spw_update (&spwent) == 0) {
|
||||
fprintf (stderr,
|
||||
_("%s: can't update shadow password file\n"), Prog);
|
||||
spw_unlock ();
|
||||
SYSLOG ((LOG_ERR, "failed updating %s", SHADOW_FILE));
|
||||
closelog ();
|
||||
#ifdef WITH_AUDIT
|
||||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
|
||||
pw->pw_name, getuid (), 0);
|
||||
#endif
|
||||
exit (E_NOPERM);
|
||||
}
|
||||
update_age (sp, pw);
|
||||
|
||||
close_files ();
|
||||
|
||||
SYSLOG ((LOG_INFO, "changed password expiry for %s", name));
|
||||
SYSLOG ((LOG_INFO, "changed password expiry for %s", user_name));
|
||||
|
||||
#ifdef USE_PAM
|
||||
pam_end (pamh, PAM_SUCCESS);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user