audit.h

/*
 * Copyright (c) 2004, 2005 Darren Tucker.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _SSH_AUDIT_H
# define _SSH_AUDIT_H

#include "loginrec.h"
#include "sshkey.h"

struct ssh;

enum ssh_audit_event_type {
    SSH_LOGIN_EXCEED_MAXTRIES,
    SSH_LOGIN_ROOT_DENIED,
    SSH_AUTH_SUCCESS,
    SSH_AUTH_FAIL_NONE,
    SSH_AUTH_FAIL_PASSWD,
    SSH_AUTH_FAIL_KBDINT,   /* keyboard-interactive or challenge-response */
    SSH_AUTH_FAIL_PUBKEY,   /* ssh2 pubkey or ssh1 rsa */
    SSH_AUTH_FAIL_HOSTBASED,    /* ssh2 hostbased or ssh1 rhostsrsa */
    SSH_AUTH_FAIL_GSSAPI,
    SSH_INVALID_USER,
    SSH_NOLOGIN,        /* denied by /etc/nologin, not implemented */
    SSH_CONNECTION_CLOSE,   /* closed after attempting auth or session */
    SSH_CONNECTION_ABANDON, /* closed without completing auth */
    SSH_AUDIT_UNKNOWN
};

enum ssh_audit_kex {
    SSH_AUDIT_UNSUPPORTED_CIPHER,
    SSH_AUDIT_UNSUPPORTED_MAC,
    SSH_AUDIT_UNSUPPORTED_COMPRESSION
};
typedef enum ssh_audit_event_type ssh_audit_event_t;

int listening_for_clients(void);

void    audit_connection_from(const char *, int);
void    audit_event(struct ssh *, ssh_audit_event_t);
void    audit_count_session_open(void);
void    audit_session_open(struct logininfo *);
void    audit_session_close(struct logininfo *);
int audit_run_command(struct ssh *, const char *);
void    audit_end_command(struct ssh *, int, const char *);
ssh_audit_event_t audit_classify_auth(const char *);
int audit_keyusage(struct ssh *, int, char *, int);
void    audit_key(struct ssh *, int, int *, const struct sshkey *);
void    audit_unsupported(struct ssh *, int);
void    audit_kex(struct ssh *, int, char *, char *, char *, char *);
void    audit_unsupported_body(struct ssh *, int);
void    audit_kex_body(struct ssh *, int, char *, char *, char *, char *, pid_t, uid_t);
void    audit_session_key_free(struct ssh *, int ctos);
void    audit_session_key_free_body(struct ssh *, int ctos, pid_t, uid_t);
void    audit_destroy_sensitive_data(struct ssh *, const char *, pid_t, uid_t);

#endif /* _SSH_AUDIT_H */