openssh/openssh-5.8p1-audit1.patch
2011-02-16 17:30:51 +01:00

121 lines
3.2 KiB
Diff

diff -up openssh-5.8p1/audit-linux.c.audit1 openssh-5.8p1/audit-linux.c
--- openssh-5.8p1/audit-linux.c.audit1 2011-02-16 15:49:11.000000000 +0100
+++ openssh-5.8p1/audit-linux.c 2011-02-16 16:48:45.000000000 +0100
@@ -39,8 +39,8 @@
const char* audit_username(void);
-int
-linux_audit_record_event(int uid, const char *username,
+static int
+linux_audit_user_login(int uid, const char *username,
const char *hostname, const char *ip, const char *ttyn, int success)
{
int audit_fd, rc, saved_errno;
@@ -68,13 +68,62 @@ linux_audit_record_event(int uid, const
return (rc >= 0);
}
+static int
+linux_audit_user_auth(int uid, const char *username,
+ const char *hostname, const char *ip, const char *ttyn, int success, int event)
+{
+ int audit_fd, rc, saved_errno;
+ static const char *event_name[] = {
+ "exceed maxtries",
+ "root denied",
+ "success",
+ "none",
+ "paasword",
+ "chalenge-response",
+ "pubkey",
+ "hostbased",
+ "gssapi",
+ "invalid user",
+ "nologin",
+ "connection close",
+ "connection abandon",
+ "unknown"
+ };
+
+ 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 ((event < 0) || (event > SSH_AUDIT_UNKNOWN))
+ event = SSH_AUDIT_UNKNOWN;
+
+ rc = audit_log_acct_message(audit_fd, AUDIT_USER_AUTH,
+ NULL, event_name[event], username ? username : "(unknown)",
+ username == NULL ? uid : -1, hostname, ip, ttyn, success);
+ saved_errno = errno;
+ close(audit_fd);
+ /*
+ * Do not report error if the error is EPERM and sshd is run as non
+ * root user.
+ */
+ if ((rc == -EPERM) && (geteuid() != 0))
+ rc = 0;
+ errno = saved_errno;
+ return (rc >= 0);
+}
+
/* Below is the sshd audit API code */
void
audit_connection_from(const char *host, int port)
{
-}
/* not implemented */
+}
void
audit_run_command(const char *command)
@@ -85,7 +134,7 @@ audit_run_command(const char *command)
void
audit_session_open(struct logininfo *li)
{
- if (linux_audit_record_event(li->uid, NULL, li->hostname,
+ if (linux_audit_user_login(li->uid, NULL, li->hostname,
NULL, li->line, 1) == 0)
fatal("linux_audit_write_entry failed: %s", strerror(errno));
}
@@ -101,10 +150,15 @@ audit_event(ssh_audit_event_t event)
{
switch(event) {
case SSH_AUTH_SUCCESS:
- case SSH_CONNECTION_CLOSE:
+ break;
+
case SSH_NOLOGIN:
case SSH_LOGIN_EXCEED_MAXTRIES:
case SSH_LOGIN_ROOT_DENIED:
+ linux_audit_user_auth(-1, audit_username(), NULL,
+ get_remote_ipaddr(), "sshd", 0, event);
+ linux_audit_user_login(-1, audit_username(), NULL,
+ get_remote_ipaddr(), "sshd", 0);
break;
case SSH_AUTH_FAIL_NONE:
@@ -113,8 +167,14 @@ audit_event(ssh_audit_event_t event)
case SSH_AUTH_FAIL_PUBKEY:
case SSH_AUTH_FAIL_HOSTBASED:
case SSH_AUTH_FAIL_GSSAPI:
+ linux_audit_user_auth(-1, audit_username(), NULL,
+ get_remote_ipaddr(), "sshd", 0, event);
+ break;
+
+ case SSH_CONNECTION_CLOSE:
+ case SSH_CONNECTION_ABANDON:
case SSH_INVALID_USER:
- linux_audit_record_event(-1, audit_username(), NULL,
+ linux_audit_user_login(-1, audit_username(), NULL,
get_remote_ipaddr(), "sshd", 0);
break;