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openssh/openssh-5.6p1-audit5.patch

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diff -up openssh-5.6p1/audit-bsm.c.audit5 openssh-5.6p1/audit-bsm.c
--- openssh-5.6p1/audit-bsm.c.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/audit-bsm.c 2011-01-14 10:04:56.000000000 +0100
@@ -401,4 +401,10 @@ audit_session_key_free_body(int ctos)
{
/* not implemented */
}
+
+void
+audit_destroy_sensitive_data(void)
+{
+ /* not implemented */
+}
#endif /* BSM */
diff -up openssh-5.6p1/audit.c.audit5 openssh-5.6p1/audit.c
--- openssh-5.6p1/audit.c.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/audit.c 2011-01-14 10:07:57.000000000 +0100
@@ -268,5 +268,14 @@ audit_session_key_free_body(int ctos)
{
debug("audit session key discard euid %d direction %d", geteuid(), ctos);
}
+
+/*
+ * This will be called on destroy private part of the server key
+ */
+void
+audit_destroy_sensitive_data(void)
+{
+ debug("audit destroy sensitive data euid %d", geteuid());
+}
# endif /* !defined CUSTOM_SSH_AUDIT_EVENTS */
#endif /* SSH_AUDIT_EVENTS */
diff -up openssh-5.6p1/audit.h.audit5 openssh-5.6p1/audit.h
--- openssh-5.6p1/audit.h.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/audit.h 2011-01-14 10:14:08.000000000 +0100
@@ -62,5 +62,6 @@ void audit_unsupported_body(int);
void audit_kex_body(int, char *, char *, char *);
void audit_session_key_free(int ctos);
void audit_session_key_free_body(int ctos);
+void audit_destroy_sensitive_data(void);
#endif /* _SSH_AUDIT_H */
diff -up openssh-5.6p1/audit-linux.c.audit5 openssh-5.6p1/audit-linux.c
--- openssh-5.6p1/audit-linux.c.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/audit-linux.c 2011-01-14 10:14:08.000000000 +0100
@@ -226,4 +226,26 @@ audit_session_key_free_body(int ctos)
error("cannot write into audit");
}
+void
+audit_destroy_sensitive_data(void)
+{
+ char buf[AUDIT_LOG_SIZE];
+ int audit_fd, audit_ok;
+
+ snprintf(buf, sizeof(buf), "destroy kind=server direction=?");
+ audit_fd = audit_open();
+ if (audit_fd < 0) {
+ if (errno != EINVAL && errno != EPROTONOSUPPORT &&
+ errno != EAFNOSUPPORT)
+ error("cannot open audit");
+ return;
+ }
+ audit_ok = audit_log_acct_message(audit_fd, AUDIT_CRYPTO_KEY_USER, NULL,
+ buf, NULL, -1, NULL, get_remote_ipaddr(), NULL, 1);
+ audit_close(audit_fd);
+ /* do not abort if the error is EPERM and sshd is run as non root user */
+ if ((audit_ok < 0) && ((audit_ok != -1) || (getuid() == 0)))
+ error("cannot write into audit");
+}
+
#endif /* USE_LINUX_AUDIT */
diff -up openssh-5.6p1/monitor.c.audit5 openssh-5.6p1/monitor.c
--- openssh-5.6p1/monitor.c.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/monitor.c 2011-01-14 10:14:08.000000000 +0100
@@ -181,6 +181,7 @@ int mm_answer_audit_command(int, Buffer
int mm_answer_audit_unsupported_body(int, Buffer *);
int mm_answer_audit_kex_body(int, Buffer *);
int mm_answer_audit_session_key_free_body(int, Buffer *);
+int mm_answer_audit_server_key_free(int, Buffer *);
#endif
static Authctxt *authctxt;
@@ -232,6 +233,7 @@ struct mon_table mon_dispatch_proto20[]
{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
{MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+ {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
#endif
#ifdef BSD_AUTH
{MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
@@ -271,6 +273,7 @@ struct mon_table mon_dispatch_postauth20
{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
{MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+ {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
#endif
{0, 0, NULL}
};
@@ -305,6 +308,7 @@ struct mon_table mon_dispatch_proto15[]
{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
{MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+ {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
#endif
{0, 0, NULL}
};
@@ -319,6 +323,7 @@ struct mon_table mon_dispatch_postauth15
{MONITOR_REQ_AUDIT_UNSUPPORTED, MON_PERMIT, mm_answer_audit_unsupported_body},
{MONITOR_REQ_AUDIT_KEX, MON_PERMIT, mm_answer_audit_kex_body},
{MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MON_PERMIT, mm_answer_audit_session_key_free_body},
+ {MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MON_PERMIT, mm_answer_audit_server_key_free},
#endif
{0, 0, NULL}
};
@@ -2271,4 +2276,15 @@ mm_answer_audit_session_key_free_body(in
mm_request_send(sock, MONITOR_ANS_AUDIT_SESSION_KEY_FREE, m);
return 0;
}
+
+int
+mm_answer_audit_server_key_free(int sock, Buffer *m)
+{
+ audit_destroy_sensitive_data();
+
+ buffer_clear(m);
+
+ mm_request_send(sock, MONITOR_ANS_AUDIT_SERVER_KEY_FREE, m);
+ return 0;
+}
#endif /* SSH_AUDIT_EVENTS */
diff -up openssh-5.6p1/monitor.h.audit5 openssh-5.6p1/monitor.h
--- openssh-5.6p1/monitor.h.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/monitor.h 2011-01-14 10:14:08.000000000 +0100
@@ -69,6 +69,7 @@ enum monitor_reqtype {
MONITOR_REQ_AUDIT_UNSUPPORTED, MONITOR_ANS_AUDIT_UNSUPPORTED,
MONITOR_REQ_AUDIT_KEX, MONITOR_ANS_AUDIT_KEX,
MONITOR_REQ_AUDIT_SESSION_KEY_FREE, MONITOR_ANS_AUDIT_SESSION_KEY_FREE,
+ MONITOR_REQ_AUDIT_SERVER_KEY_FREE, MONITOR_ANS_AUDIT_SERVER_KEY_FREE,
};
struct mm_master;
diff -up openssh-5.6p1/monitor_wrap.c.audit5 openssh-5.6p1/monitor_wrap.c
--- openssh-5.6p1/monitor_wrap.c.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/monitor_wrap.c 2011-01-14 10:14:08.000000000 +0100
@@ -1458,4 +1458,16 @@ mm_audit_session_key_free_body(int ctos)
&m);
buffer_free(&m);
}
+
+void
+mm_audit_destroy_sensitive_data(void)
+{
+ Buffer m;
+
+ buffer_init(&m);
+ mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_SERVER_KEY_FREE, &m);
+ mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUDIT_SERVER_KEY_FREE,
+ &m);
+ buffer_free(&m);
+}
#endif /* SSH_AUDIT_EVENTS */
diff -up openssh-5.6p1/monitor_wrap.h.audit5 openssh-5.6p1/monitor_wrap.h
--- openssh-5.6p1/monitor_wrap.h.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/monitor_wrap.h 2011-01-14 10:14:08.000000000 +0100
@@ -77,6 +77,7 @@ void mm_audit_run_command(const char *);
void mm_audit_unsupported_body(int);
void mm_audit_kex_body(int, char *, char *, char *);
void mm_audit_session_key_free_body(int);
+void mm_audit_server_key_free_body(void);
#endif
struct Session;
diff -up openssh-5.6p1/session.c.audit5 openssh-5.6p1/session.c
--- openssh-5.6p1/session.c.audit5 2010-06-26 02:00:15.000000000 +0200
+++ openssh-5.6p1/session.c 2011-01-14 10:14:08.000000000 +0100
@@ -1677,6 +1677,7 @@ do_child(Session *s, const char *command
/* remove hostkey from the child's memory */
destroy_sensitive_data();
+ PRIVSEP(audit_destroy_sensitive_data());
/* Force a password change */
if (s->authctxt->force_pwchange) {
diff -up openssh-5.6p1/sshd.c.audit5 openssh-5.6p1/sshd.c
--- openssh-5.6p1/sshd.c.audit5 2011-01-14 10:14:08.000000000 +0100
+++ openssh-5.6p1/sshd.c 2011-01-14 10:14:08.000000000 +0100
@@ -579,6 +579,7 @@ demote_sensitive_data(void)
}
/* Certs do not need demotion */
}
+ audit_destroy_sensitive_data();
/* We do not clear ssh1_host key and cookie. XXX - Okay Niels? */
}
@@ -2011,8 +2012,10 @@ main(int ac, char **av)
if (use_privsep) {
privsep_postauth(authctxt);
/* the monitor process [priv] will not return */
- if (!compat20)
+ if (!compat20) {
destroy_sensitive_data();
+ audit_destroy_sensitive_data();
+ }
}
packet_set_timeout(options.client_alive_interval,
@@ -2249,6 +2252,7 @@ do_ssh1_kex(void)
}
/* Destroy the private and public keys. No longer. */
destroy_sensitive_data();
+ audit_destroy_sensitive_data();
if (use_privsep)
mm_ssh1_session_id(session_id);
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