diff options
Diffstat (limited to 'sys-libs/glibc/files/2.3.5/ssp.c')
| -rw-r--r-- | sys-libs/glibc/files/2.3.5/ssp.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/sys-libs/glibc/files/2.3.5/ssp.c b/sys-libs/glibc/files/2.3.5/ssp.c deleted file mode 100644 index 99f8531..0000000 --- a/sys-libs/glibc/files/2.3.5/ssp.c +++ /dev/null @@ -1,155 +0,0 @@ -/* - * Distributed under the terms of the GNU General Public License v2 - * $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/files/2.3.5/Attic/ssp.c,v 1.4 2009/12/14 14:44:11 vapier dead $ - * - * This is a modified version of Hiroaki Etoh's stack smashing routines - * implemented for glibc. - * - * The following people have contributed input to this code. - * Ned Ludd - <solar[@]gentoo.org> - * Alexander Gabert - <pappy[@]gentoo.org> - * The PaX Team - <pageexec[@]freemail.hu> - * Peter S. Mazinger - <ps.m[@]gmx.net> - * Yoann Vandoorselaere - <yoann[@]prelude-ids.org> - * Robert Connolly - <robert[@]linuxfromscratch.org> - * Cory Visi <cory@visi.name> - * - */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#ifdef __SSP__ -# error ssp.c has to be built w/ -fno-stack-protector -#endif - -#include <stdio.h> -#include <string.h> -#include <fcntl.h> -#include <unistd.h> -#include <signal.h> -#include <sys/types.h> -#include <sys/un.h> -#include <sys/syslog.h> -#include <sys/time.h> -#ifdef __SSP_USE_ERANDOM__ -# include <sys/sysctl.h> -#endif - -#ifdef __PROPOLICE_BLOCK_SEGV__ -# define SSP_SIGTYPE SIGSEGV -#elif __PROPOLICE_BLOCK_KILL__ -# define SSP_SIGTYPE SIGKILL -#else -# define SSP_SIGTYPE SIGABRT -#endif - -unsigned long __guard = 0UL; - -/* Use of __* functions from the rest of glibc here avoids - * initialisation problems for executables preloaded with - * libraries that overload the associated standard library - * functions. - */ -#ifdef __UCLIBC__ -extern int __libc_open(__const char *file, int flags, ...); -extern ssize_t __libc_read(int fd, void *buf, size_t count); -extern int __libc_close(int fd); -#else -# define __libc_open(file, flags) __open(file, flags) -# define __libc_read(fd, buf, count) __read(fd, buf, count) -# define __libc_close(fd) __close(fd) -# define __libc_write(fd, buf, count) __write(fd, buf, count) -#endif - -void __guard_setup(void) __attribute__ ((constructor)); -void __guard_setup(void) -{ - size_t size; - - if (__guard != 0UL) - return; - - /* Start with the "terminator canary". */ - __guard = 0xFF0A0D00UL; - -#ifndef __SSP_QUICK_CANARY__ -# ifdef __SSP_USE_ERANDOM__ - { - int mib[3]; - /* Random is another depth in Linux, hence an array of 3. */ - mib[0] = CTL_KERN; - mib[1] = KERN_RANDOM; - mib[2] = RANDOM_ERANDOM; - - size = sizeof(unsigned long); - if (__sysctl(mib, 3, &__guard, &size, NULL, 0) != (-1)) - if (__guard != 0UL) - return; - } -# endif /* ifdef __SSP_USE_ERANDOM__ */ - /* - * Attempt to open kernel pseudo random device if one exists before - * opening urandom to avoid system entropy depletion. - */ - { - int fd; - -# ifdef __SSP_USE_ERANDOM__ - if ((fd = __libc_open("/dev/erandom", O_RDONLY)) == (-1)) -# endif - fd = __libc_open("/dev/urandom", O_RDONLY); - if (fd != (-1)) { - size = __libc_read(fd, (char *) &__guard, sizeof(__guard)); - __libc_close(fd); - if (size == sizeof(__guard)) - return; - } - } -#endif /* ifndef __SSP_QUICK_CANARY__ */ - - /* Everything failed? Or we are using a weakened model of the - * terminator canary */ - { - struct timeval tv; - __gettimeofday(&tv, NULL); - __guard ^= tv.tv_usec ^ tv.tv_sec; - } -} - -void __stack_smash_handler(char func[], int damaged __attribute__ ((unused))); -void __stack_smash_handler(char func[], int damaged) -{ - extern char *__progname; - const char message[] = ": stack smashing attack in function "; - struct sigaction sa; - sigset_t mask; - - sigfillset(&mask); - - sigdelset(&mask, SSP_SIGTYPE); /* Block all signal handlers */ - sigprocmask(SIG_BLOCK, &mask, NULL); /* except SSP_SIGTYPE */ - - /* Print error message to stderr and syslog */ -#if 1 /* syslog() causes issues with glibc #94325 */ - __libc_write(STDERR_FILENO, __progname, strlen(__progname)); - __libc_write(STDERR_FILENO, message, strlen(message)); - __libc_write(STDERR_FILENO, func, strlen(func)); - __libc_write(STDERR_FILENO, "()\n", 3); - //_syscall3(int, _ssp_syslog, int, type, char *, bufp, int, len) - //_ssp_syslog(LOG_INFO, -#else - fprintf(stderr, "%s%s%s()\n", __progname, message, func); - syslog(LOG_INFO, "%s%s%s()", __progname, message, func); -#endif - - /* Make the default handler associated with the signal handler */ - memset(&sa, 0, sizeof(struct sigaction)); - sigfillset(&sa.sa_mask); /* Block all signals */ - sa.sa_flags = 0; - sa.sa_handler = SIG_DFL; - sigaction(SSP_SIGTYPE, &sa, NULL); - (void) kill(getpid(), SSP_SIGTYPE); - _exit(127); -} |