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openSUSE:11.4
kdebase3
kdm-audit-log.diff
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File kdm-audit-log.diff of Package kdebase3
Index: kdm/backend/client.c =================================================================== --- kdm/backend/client.c.orig +++ kdm/backend/client.c @@ -87,6 +87,14 @@ extern int loginsuccess( const char *Use #include "consolekit.h" #endif +#define AU_FAILED 0 +#define AU_SUCCESS 1 +#ifdef HAVE_LIBAUDIT +#include <libaudit.h> +#else +#define log_to_audit_system(l,h,d,s) do { ; } while (0) +#endif + /* * Session data, mostly what struct verify_info was for */ @@ -291,6 +299,56 @@ fail_delay( int retval ATTR_UNUSED, unsi {} # endif + /** + * log_to_audit_system: + * @login: Name of user + * @hostname: Name of host machine + * @tty: Name of display + * @success: 1 for success, 0 for failure + * + * Logs the success or failure of the login attempt with the linux kernel + * audit system. The intent is to capture failed events where the user + * fails authentication or otherwise is not permitted to login. There are + * many other places where pam could potentially fail and cause login to + * fail, but these are system failures rather than the signs of an account + * being hacked. + * + * Returns nothing. + */ + +#ifdef HAVE_LIBAUDIT +static void +log_to_audit_system (const char *loginname, + const char *hostname, + const char *tty, + int success) +{ + struct passwd *pw; + char buf[64]; + int audit_fd; + + audit_fd = audit_open(); + if (loginname) + pw = getpwnam(loginname); + else { + loginname = "unknown"; + pw = NULL; + } + Debug("log_to_audit %p %s\n", pw, loginname); + + if (pw) { + snprintf(buf, sizeof(buf), "uid=%d", pw->pw_uid); + audit_log_user_message(audit_fd, AUDIT_USER_LOGIN, + buf, hostname, NULL, tty, (int)success); + } else { + snprintf(buf, sizeof(buf), "acct=%s", loginname); + audit_log_user_message(audit_fd, AUDIT_USER_LOGIN, + buf, hostname, NULL, tty, (int)success); + } + close(audit_fd); +} +#endif + static int doPAMAuth( const char *psrv, struct pam_data *pdata ) { @@ -349,6 +407,8 @@ doPAMAuth( const char *psrv, struct pam_ GSendStr( curuser ); } if (pretc != PAM_SUCCESS) { + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); switch (pretc) { case PAM_USER_UNKNOWN: case PAM_AUTH_ERR: @@ -702,6 +762,8 @@ Verify( GConvFunc gconv, int rootok ) if (!p->pw_uid) { if (!rootok && !td->allowRootLogin) V_RET_FAIL( "Root logins are not allowed" ); + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); return 1; /* don't deny root to log in */ } @@ -738,6 +800,8 @@ Verify( GConvFunc gconv, int rootok ) } if (pretc == PAM_SUCCESS) break; + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); /* effectively there is only PAM_AUTHTOK_ERR */ GSendInt( V_FAIL ); } @@ -827,6 +891,8 @@ Verify( GConvFunc gconv, int rootok ) GSendInt( V_MSG_ERR ); GSendStr( "Your account has expired;" " please contact your system administrator" ); + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); GSendInt( V_FAIL ); LC_RET0; } else if (tim > (expir - warntime) && !quietlog) { @@ -861,6 +927,8 @@ Verify( GConvFunc gconv, int rootok ) GSendInt( V_MSG_ERR ); GSendStr( "Your account has expired;" " please contact your system administrator" ); + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); GSendInt( V_FAIL ); LC_RET0; } @@ -920,6 +988,8 @@ Verify( GConvFunc gconv, int rootok ) close( fd ); } GSendStr( "Logins are not allowed at the moment.\nTry again later" ); + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); GSendInt( V_FAIL ); LC_RET0; } @@ -930,6 +1000,8 @@ Verify( GConvFunc gconv, int rootok ) PrepErrorGreet(); GSendInt( V_MSG_ERR ); GSendStr( "You are not allowed to login at the moment" ); + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); GSendInt( V_FAIL ); LC_RET0; } @@ -941,6 +1013,8 @@ Verify( GConvFunc gconv, int rootok ) Debug( "shell not in /etc/shells\n" ); endusershell(); V_RET_FAIL( "Your login shell is not listed in /etc/shells" ); + /* Log the failed login attempt */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_FAILED); } if (!strcmp( s, p->pw_shell )) { endusershell(); @@ -1365,6 +1439,9 @@ StartClient() # define D_LOGIN_SETGROUP 0 #endif /* USE_PAM */ + /* Login succeeded */ + log_to_audit_system (curuser, td->remoteHost, td->name, AU_SUCCESS); + removeAuth = 1; chownCtrl( &td->ctrl, curuid ); endpwent(); Index: kdm/configure.in.in =================================================================== --- kdm/configure.in.in.orig +++ kdm/configure.in.in @@ -288,3 +288,27 @@ fi AC_SUBST(DBUS_LIBS) dnl AC_OUTPUT(kdm/kfrontend/sessions/kde.desktop) + + +AC_ARG_WITH(libaudit, + [ --with-libaudit=[auto/yes/no] Add Linux audit support [default=auto]],, + with_libaudit=auto) + +# Check for Linux auditing API +# +# libaudit detection +if test x$with_libaudit = xno ; then + have_libaudit=no; +else + # See if we have audit daemon library + AC_CHECK_LIB(audit, audit_log_user_message, + have_libaudit=yes, have_libaudit=no) +fi + +AM_CONDITIONAL(HAVE_LIBAUDIT, test x$have_libaudit = xyes) + +if test x$have_libaudit = xyes ; then + EXTRA_DAEMON_LIBS="$EXTRA_DAEMON_LIBS -laudit" + AC_DEFINE(HAVE_LIBAUDIT,1,[linux audit support]) +fi +
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