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-rw-r--r--src/gs-auth-pwent.c291
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diff --git a/src/gs-auth-pwent.c b/src/gs-auth-pwent.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (c) 1993-1998 Jamie Zawinski <[email protected]>
+ * Copyright (C) 2006 William Jon McCann <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_CRYPT_H
+# include <crypt.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
+
+#ifdef __bsdi__
+# include <sys/param.h>
+# if _BSDI_VERSION >= 199608
+# define BSD_AUTH
+# endif
+#endif /* __bsdi__ */
+
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#if defined(HAVE_SHADOW_PASSWD) /* passwds live in /etc/shadow */
+
+# include <shadow.h>
+# define PWTYPE struct spwd *
+# define PWPSLOT sp_pwdp
+# define GETPW getspnam
+
+#elif defined(HAVE_ENHANCED_PASSWD) /* passwds live in /tcb/files/auth/ */
+/* M.Matsumoto <[email protected]> */
+# include <sys/security.h>
+# include <prot.h>
+
+# define PWTYPE struct pr_passwd *
+# define PWPSLOT ufld.fd_encrypt
+# define GETPW getprpwnam
+
+#elif defined(HAVE_ADJUNCT_PASSWD)
+
+# include <sys/label.h>
+# include <sys/audit.h>
+# include <pwdadj.h>
+
+# define PWTYPE struct passwd_adjunct *
+# define PWPSLOT pwa_passwd
+# define GETPW getpwanam
+
+#elif defined(HAVE_HPUX_PASSWD)
+
+# include <hpsecurity.h>
+# include <prot.h>
+
+# define PWTYPE struct s_passwd *
+# define PWPSLOT pw_passwd
+# define GETPW getspwnam
+
+# define HAVE_BIGCRYPT
+
+#endif
+
+#include "gs-auth.h"
+
+static gboolean verbose_enabled = FALSE;
+
+static char *encrypted_user_passwd = NULL;
+
+GQuark
+gs_auth_error_quark (void)
+{
+ static GQuark quark = 0;
+ if (! quark)
+ {
+ quark = g_quark_from_static_string ("gs_auth_error");
+ }
+
+ return quark;
+}
+
+void
+gs_auth_set_verbose (gboolean enabled)
+{
+ verbose_enabled = enabled;
+}
+
+gboolean
+gs_auth_get_verbose (void)
+{
+ return verbose_enabled;
+}
+
+static gboolean
+passwd_known (const char *pw)
+{
+ return (pw &&
+ pw[0] != '*' && /* This would be sensible... */
+ strlen (pw) > 4); /* ...but this is what Solaris does. */
+}
+
+static char *
+get_encrypted_passwd (const char *user)
+{
+ char *result = NULL;
+
+#ifdef PWTYPE
+ if (user && *user && !result)
+ {
+ /* First check the shadow passwords. */
+ PWTYPE p = GETPW ((char *) user);
+ if (p && passwd_known (p->PWPSLOT))
+ {
+ result = g_strdup (p->PWPSLOT);
+ }
+ }
+#endif /* PWTYPE */
+
+ if (user && *user && !result)
+ {
+ /* Check non-shadow passwords too. */
+ struct passwd *p = getpwnam (user);
+ if (p && passwd_known (p->pw_passwd))
+ {
+ result = g_strdup (p->pw_passwd);
+ }
+ }
+
+ /* The manual for passwd(4) on HPUX 10.10 says:
+
+ Password aging is put in effect for a particular user if his
+ encrypted password in the password file is followed by a comma and
+ a nonnull string of characters from the above alphabet. This
+ string defines the "age" needed to implement password aging.
+
+ So this means that passwd->pw_passwd isn't simply a string of cyphertext,
+ it might have trailing junk. So, if there is a comma in the string, and
+ that comma is beyond position 13, terminate the string before the comma.
+ */
+ if (result && strlen (result) > 13)
+ {
+ char *s = strchr (result + 13, ',');
+ if (s)
+ {
+ *s = 0;
+ }
+ }
+
+#ifndef HAVE_PAM
+ /* We only issue this warning if not compiled with support for PAM.
+ If we're using PAM, it's not unheard of that normal pwent passwords
+ would be unavailable. */
+
+ if (!result)
+ {
+ g_warning ("Couldn't get password of \"%s\"",
+ (user ? user : "(null)"));
+ }
+
+#endif /* !HAVE_PAM */
+
+ return result;
+}
+
+/* This has to be called before we've changed our effective user ID,
+ because it might need privileges to get at the encrypted passwords.
+ Returns false if we weren't able to get any passwords, and therefore,
+ locking isn't possible. (It will also have written to stderr.)
+*/
+
+gboolean
+gs_auth_priv_init (void)
+{
+ const char *u;
+
+ u = g_get_user_name ();
+
+ encrypted_user_passwd = get_encrypted_passwd (u);
+
+ if (encrypted_user_passwd != NULL)
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
+
+
+gboolean
+gs_auth_init (void)
+{
+ if (encrypted_user_passwd != NULL)
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
+
+static gboolean
+passwds_match (const char *cleartext,
+ const char *ciphertext)
+{
+ char *s = NULL; /* note that on some systems, crypt() may return null */
+
+ s = (char *) crypt (cleartext, ciphertext);
+ if (s && !strcmp (s, ciphertext))
+ {
+ return TRUE;
+ }
+
+#ifdef HAVE_BIGCRYPT
+ /* There seems to be no way to tell at runtime if an HP machine is in
+ "trusted" mode, and thereby, which of crypt() or bigcrypt() we should
+ be calling to compare passwords. So call them both, and see which
+ one works. */
+
+ s = (char *) bigcrypt (cleartext, ciphertext);
+ if (s && !strcmp (s, ciphertext))
+ {
+ return TRUE;
+ }
+
+#endif /* HAVE_BIGCRYPT */
+
+ return FALSE;
+}
+
+gboolean
+gs_auth_verify_user (const char *username,
+ const char *display,
+ GSAuthMessageFunc func,
+ gpointer data,
+ GError **error)
+{
+ char *password;
+
+ password = NULL;
+
+ /* ask for the password for user */
+ if (func != NULL)
+ {
+ func (GS_AUTH_MESSAGE_PROMPT_ECHO_OFF,
+ "Password: ",
+ &password,
+ data);
+ }
+
+ if (password == NULL)
+ {
+ return FALSE;
+ }
+
+ if (encrypted_user_passwd && passwds_match (password, encrypted_user_passwd))
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
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