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openSUSE:12.3
openssh
openssh-5.9p1-audit.patch
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File openssh-5.9p1-audit.patch of Package openssh
# add support for Linux audit (FATE #120269) ================================================================================ Index: openssh-5.8p1/Makefile.in =================================================================== --- openssh-5.8p1.orig/Makefile.in +++ openssh-5.8p1/Makefile.in @@ -47,6 +47,7 @@ CFLAGS=@CFLAGS@ CPPFLAGS=-I. -I$(srcdir) @CPPFLAGS@ $(PATHS) @DEFS@ LIBS=@LIBS@ SSHLIBS=@SSHLIBS@ +LIBAUDIT=@LIBAUDIT@ SSHDLIBS=@SSHDLIBS@ LIBEDIT=@LIBEDIT@ AR=@AR@ @@ -146,7 +147,7 @@ ssh$(EXEEXT): $(LIBCOMPAT) libssh.a $(SS $(LD) -o $@ $(SSHOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(SSHLIBS) $(LIBS) sshd$(EXEEXT): libssh.a $(LIBCOMPAT) $(SSHDOBJS) - $(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(SSHDLIBS) $(LIBS) + $(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(SSHDLIBS) $(LIBS) $(LIBAUDIT) scp$(EXEEXT): $(LIBCOMPAT) libssh.a scp.o progressmeter.o $(LD) -o $@ scp.o progressmeter.o bufaux.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS) Index: openssh-5.8p1/auth.c =================================================================== --- openssh-5.8p1.orig/auth.c +++ openssh-5.8p1/auth.c @@ -293,6 +293,12 @@ auth_log(Authctxt *authctxt, int authent get_canonical_hostname(options.use_dns), "ssh", &loginmsg); # endif #endif +#if HAVE_LINUX_AUDIT + if (authenticated == 0 && !authctxt->postponed) { + linux_audit_record_event(-1, authctxt->user, NULL, + get_remote_ipaddr(), "sshd", 0); + } +#endif #ifdef SSH_AUDIT_EVENTS if (authenticated == 0 && !authctxt->postponed) audit_event(audit_classify_auth(method)); @@ -592,6 +598,10 @@ getpwnamallow(const char *user) record_failed_login(user, get_canonical_hostname(options.use_dns), "ssh"); #endif +#ifdef HAVE_LINUX_AUDIT + linux_audit_record_event(-1, user, NULL, get_remote_ipaddr(), + "sshd", 0); +#endif #ifdef SSH_AUDIT_EVENTS audit_event(SSH_INVALID_USER); #endif /* SSH_AUDIT_EVENTS */ Index: openssh-5.8p1/config.h.in =================================================================== --- openssh-5.8p1.orig/config.h.in +++ openssh-5.8p1/config.h.in @@ -1460,6 +1460,9 @@ /* Define if you want SELinux support. */ #undef WITH_SELINUX +/* Define if you want Linux audit support. */ +#undef HAVE_LINUX_AUDIT + /* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most significant byte first (like Motorola and SPARC, unlike Intel). */ #if defined AC_APPLE_UNIVERSAL_BUILD Index: openssh-5.8p1/configure.ac =================================================================== --- openssh-5.8p1.orig/configure.ac +++ openssh-5.8p1/configure.ac @@ -3522,6 +3522,20 @@ AC_ARG_WITH(selinux, AC_SUBST([SSHLIBS]) AC_SUBST([SSHDLIBS]) +# Check whether user wants Linux audit support +LINUX_AUDIT_MSG="no" +LIBAUDIT="" +AC_ARG_WITH([linux-audit], + [ --with-linux-audit Enable Linux audit support], + [ if test "x$withval" != "xno" ; then + AC_DEFINE([HAVE_LINUX_AUDIT],[1],[Define if you want Linux audit support.]) + LINUX_AUDIT_MSG="yes" + AC_CHECK_HEADERS([libaudit.h]) + LIBAUDIT="-laudit" + fi + ]) +AC_SUBST([LIBAUDIT]) + # Check whether user wants Kerberos 5 support KRB5_MSG="no" AC_ARG_WITH([kerberos5], @@ -4316,6 +4330,7 @@ echo " PAM support echo " OSF SIA support: $SIA_MSG" echo " KerberosV support: $KRB5_MSG" echo " SELinux support: $SELINUX_MSG" +echo " Linux audit support: $LINUX_AUDIT_MSG" echo " Smartcard support: $SCARD_MSG" echo " S/KEY support: $SKEY_MSG" echo " TCP Wrappers support: $TCPW_MSG" Index: openssh-5.8p1/loginrec.c =================================================================== --- openssh-5.8p1.orig/loginrec.c +++ openssh-5.8p1/loginrec.c @@ -176,6 +176,10 @@ #include "auth.h" #include "buffer.h" +#ifdef HAVE_LINUX_AUDIT +# include <libaudit.h> +#endif + #ifdef HAVE_UTIL_H # include <util.h> #endif @@ -202,6 +206,9 @@ int utmp_write_entry(struct logininfo *l int utmpx_write_entry(struct logininfo *li); int wtmp_write_entry(struct logininfo *li); int wtmpx_write_entry(struct logininfo *li); +#ifdef HAVE_LINUX_AUDIT +int linux_audit_write_entry(struct logininfo *li); +#endif int lastlog_write_entry(struct logininfo *li); int syslogin_write_entry(struct logininfo *li); @@ -442,6 +449,10 @@ login_write(struct logininfo *li) /* set the timestamp */ login_set_current_time(li); +#ifdef HAVE_LINUX_AUDIT + if (linux_audit_write_entry(li) == 0) + fatal("linux_audit_write_entry failed: %s", strerror(errno)); +#endif #ifdef USE_LOGIN syslogin_write_entry(li); #endif @@ -1406,6 +1417,87 @@ wtmpx_get_entry(struct logininfo *li) } #endif /* USE_WTMPX */ +#ifdef HAVE_LINUX_AUDIT +static void +_audit_hexscape(const char *what, char *where, unsigned int size) +{ + const char *ptr = what; + const char *hex = "0123456789ABCDEF"; + + while (*ptr) { + if (*ptr == '"' || *ptr < 0x21 || *ptr > 0x7E) { + unsigned int i; + ptr = what; + for (i = 0; *ptr && i+2 < size; i += 2) { + where[i] = hex[((unsigned)*ptr & 0xF0)>>4]; /* Upper nibble */ + where[i+1] = hex[(unsigned)*ptr & 0x0F]; /* Lower nibble */ + ptr++; + } + where[i] = '\0'; + return; + } + ptr++; + } + where[0] = '"'; + if ((unsigned)(ptr - what) < size - 3) + { + size = ptr - what + 3; + } + strncpy(where + 1, what, size - 3); + where[size-2] = '"'; + where[size-1] = '\0'; +} + +#define AUDIT_LOG_SIZE 128 +#define AUDIT_ACCT_SIZE (AUDIT_LOG_SIZE - 8) + +int +linux_audit_record_event(int uid, const char *username, + const char *hostname, const char *ip, const char *ttyn, int success) +{ + char buf[AUDIT_LOG_SIZE]; + int audit_fd, rc; + + audit_fd = audit_open(); + if (audit_fd < 0) { + if (errno == EINVAL || errno == EPROTONOSUPPORT || + errno == EAFNOSUPPORT) + return 1; /* No audit support in kernel */ + else + return 0; /* Must prevent login */ + } + if (username == NULL) + snprintf(buf, sizeof(buf), "uid=%d", uid); + else { + char encoded[AUDIT_ACCT_SIZE]; + _audit_hexscape(username, encoded, sizeof(encoded)); + snprintf(buf, sizeof(buf), "acct=%s", encoded); + } + rc = audit_log_user_message(audit_fd, AUDIT_USER_LOGIN, + buf, hostname, ip, ttyn, success); + close(audit_fd); + if (rc >= 0) + return 1; + else + return 0; +} + +int +linux_audit_write_entry(struct logininfo *li) +{ + switch(li->type) { + case LTYPE_LOGIN: + return (linux_audit_record_event(li->uid, NULL, li->hostname, + NULL, li->line, 1)); + case LTYPE_LOGOUT: + return (1); /* We only care about logins */ + default: + logit("%s: invalid type field", __func__); + return (0); + } +} +#endif /* HAVE_LINUX_AUDIT */ + /** ** Low-level libutil login() functions **/ Index: openssh-5.8p1/loginrec.h =================================================================== --- openssh-5.8p1.orig/loginrec.h +++ openssh-5.8p1/loginrec.h @@ -127,5 +127,9 @@ char *line_stripname(char *dst, const ch char *line_abbrevname(char *dst, const char *src, int dstsize); void record_failed_login(const char *, const char *, const char *); +#ifdef HAVE_LINUX_AUDIT +int linux_audit_record_event(int uid, const char *username, + const char *hostname, const char *ip, const char *ttyn, int success); +#endif /* HAVE_LINUX_AUDIT */ #endif /* _HAVE_LOGINREC_H_ */
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