1146998Sdes/* 2146998Sdes * Copyright (c) 2004, 2005 Darren Tucker. All rights reserved. 3146998Sdes * 4146998Sdes * Redistribution and use in source and binary forms, with or without 5146998Sdes * modification, are permitted provided that the following conditions 6146998Sdes * are met: 7146998Sdes * 1. Redistributions of source code must retain the above copyright 8146998Sdes * notice, this list of conditions and the following disclaimer. 9146998Sdes * 2. Redistributions in binary form must reproduce the above copyright 10146998Sdes * notice, this list of conditions and the following disclaimer in the 11146998Sdes * documentation and/or other materials provided with the distribution. 12146998Sdes * 13146998Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14146998Sdes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15146998Sdes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16146998Sdes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17146998Sdes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18146998Sdes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19146998Sdes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20146998Sdes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21146998Sdes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22146998Sdes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23146998Sdes */ 24146998Sdes 25146998Sdes#include "includes.h" 26146998Sdes 27162852Sdes#include <stdarg.h> 28162852Sdes#include <string.h> 29162852Sdes 30146998Sdes#ifdef SSH_AUDIT_EVENTS 31146998Sdes 32146998Sdes#include "audit.h" 33146998Sdes#include "log.h" 34162852Sdes#include "key.h" 35162852Sdes#include "hostfile.h" 36146998Sdes#include "auth.h" 37146998Sdes 38146998Sdes/* 39146998Sdes * Care must be taken when using this since it WILL NOT be initialized when 40146998Sdes * audit_connection_from() is called and MAY NOT be initialized when 41146998Sdes * audit_event(CONNECTION_ABANDON) is called. Test for NULL before using. 42146998Sdes */ 43146998Sdesextern Authctxt *the_authctxt; 44146998Sdes 45146998Sdes/* Maybe add the audit class to struct Authmethod? */ 46146998Sdesssh_audit_event_t 47146998Sdesaudit_classify_auth(const char *method) 48146998Sdes{ 49146998Sdes if (strcmp(method, "none") == 0) 50146998Sdes return SSH_AUTH_FAIL_NONE; 51146998Sdes else if (strcmp(method, "password") == 0) 52146998Sdes return SSH_AUTH_FAIL_PASSWD; 53146998Sdes else if (strcmp(method, "publickey") == 0 || 54146998Sdes strcmp(method, "rsa") == 0) 55146998Sdes return SSH_AUTH_FAIL_PUBKEY; 56146998Sdes else if (strncmp(method, "keyboard-interactive", 20) == 0 || 57146998Sdes strcmp(method, "challenge-response") == 0) 58146998Sdes return SSH_AUTH_FAIL_KBDINT; 59146998Sdes else if (strcmp(method, "hostbased") == 0 || 60146998Sdes strcmp(method, "rhosts-rsa") == 0) 61146998Sdes return SSH_AUTH_FAIL_HOSTBASED; 62146998Sdes else if (strcmp(method, "gssapi-with-mic") == 0) 63146998Sdes return SSH_AUTH_FAIL_GSSAPI; 64146998Sdes else 65146998Sdes return SSH_AUDIT_UNKNOWN; 66146998Sdes} 67146998Sdes 68146998Sdes/* helper to return supplied username */ 69146998Sdesconst char * 70146998Sdesaudit_username(void) 71146998Sdes{ 72146998Sdes static const char unknownuser[] = "(unknown user)"; 73146998Sdes static const char invaliduser[] = "(invalid user)"; 74146998Sdes 75146998Sdes if (the_authctxt == NULL || the_authctxt->user == NULL) 76146998Sdes return (unknownuser); 77146998Sdes if (!the_authctxt->valid) 78146998Sdes return (invaliduser); 79146998Sdes return (the_authctxt->user); 80146998Sdes} 81146998Sdes 82146998Sdesconst char * 83146998Sdesaudit_event_lookup(ssh_audit_event_t ev) 84146998Sdes{ 85146998Sdes int i; 86146998Sdes static struct event_lookup_struct { 87146998Sdes ssh_audit_event_t event; 88146998Sdes const char *name; 89146998Sdes } event_lookup[] = { 90146998Sdes {SSH_LOGIN_EXCEED_MAXTRIES, "LOGIN_EXCEED_MAXTRIES"}, 91146998Sdes {SSH_LOGIN_ROOT_DENIED, "LOGIN_ROOT_DENIED"}, 92146998Sdes {SSH_AUTH_SUCCESS, "AUTH_SUCCESS"}, 93146998Sdes {SSH_AUTH_FAIL_NONE, "AUTH_FAIL_NONE"}, 94146998Sdes {SSH_AUTH_FAIL_PASSWD, "AUTH_FAIL_PASSWD"}, 95146998Sdes {SSH_AUTH_FAIL_KBDINT, "AUTH_FAIL_KBDINT"}, 96146998Sdes {SSH_AUTH_FAIL_PUBKEY, "AUTH_FAIL_PUBKEY"}, 97146998Sdes {SSH_AUTH_FAIL_HOSTBASED, "AUTH_FAIL_HOSTBASED"}, 98146998Sdes {SSH_AUTH_FAIL_GSSAPI, "AUTH_FAIL_GSSAPI"}, 99146998Sdes {SSH_INVALID_USER, "INVALID_USER"}, 100146998Sdes {SSH_NOLOGIN, "NOLOGIN"}, 101146998Sdes {SSH_CONNECTION_CLOSE, "CONNECTION_CLOSE"}, 102146998Sdes {SSH_CONNECTION_ABANDON, "CONNECTION_ABANDON"}, 103146998Sdes {SSH_AUDIT_UNKNOWN, "AUDIT_UNKNOWN"} 104146998Sdes }; 105146998Sdes 106146998Sdes for (i = 0; event_lookup[i].event != SSH_AUDIT_UNKNOWN; i++) 107146998Sdes if (event_lookup[i].event == ev) 108146998Sdes break; 109146998Sdes return(event_lookup[i].name); 110146998Sdes} 111146998Sdes 112146998Sdes# ifndef CUSTOM_SSH_AUDIT_EVENTS 113146998Sdes/* 114146998Sdes * Null implementations of audit functions. 115146998Sdes * These get used if SSH_AUDIT_EVENTS is defined but no audit module is enabled. 116146998Sdes */ 117146998Sdes 118146998Sdes/* 119146998Sdes * Called after a connection has been accepted but before any authentication 120146998Sdes * has been attempted. 121146998Sdes */ 122146998Sdesvoid 123146998Sdesaudit_connection_from(const char *host, int port) 124146998Sdes{ 125146998Sdes debug("audit connection from %s port %d euid %d", host, port, 126149749Sdes (int)geteuid()); 127146998Sdes} 128146998Sdes 129146998Sdes/* 130146998Sdes * Called when various events occur (see audit.h for a list of possible 131146998Sdes * events and what they mean). 132146998Sdes */ 133146998Sdesvoid 134146998Sdesaudit_event(ssh_audit_event_t event) 135146998Sdes{ 136146998Sdes debug("audit event euid %d user %s event %d (%s)", geteuid(), 137146998Sdes audit_username(), event, audit_event_lookup(event)); 138146998Sdes} 139146998Sdes 140146998Sdes/* 141146998Sdes * Called when a user session is started. Argument is the tty allocated to 142146998Sdes * the session, or NULL if no tty was allocated. 143146998Sdes * 144146998Sdes * Note that this may be called multiple times if multiple sessions are used 145146998Sdes * within a single connection. 146146998Sdes */ 147146998Sdesvoid 148221420Sdesaudit_session_open(struct logininfo *li) 149146998Sdes{ 150221420Sdes const char *t = li->line ? li->line : "(no tty)"; 151146998Sdes 152146998Sdes debug("audit session open euid %d user %s tty name %s", geteuid(), 153149749Sdes audit_username(), t); 154146998Sdes} 155146998Sdes 156146998Sdes/* 157146998Sdes * Called when a user session is closed. Argument is the tty allocated to 158146998Sdes * the session, or NULL if no tty was allocated. 159146998Sdes * 160146998Sdes * Note that this may be called multiple times if multiple sessions are used 161146998Sdes * within a single connection. 162146998Sdes */ 163146998Sdesvoid 164221420Sdesaudit_session_close(struct logininfo *li) 165146998Sdes{ 166221420Sdes const char *t = li->line ? li->line : "(no tty)"; 167146998Sdes 168146998Sdes debug("audit session close euid %d user %s tty name %s", geteuid(), 169149749Sdes audit_username(), t); 170146998Sdes} 171146998Sdes 172146998Sdes/* 173146998Sdes * This will be called when a user runs a non-interactive command. Note that 174146998Sdes * it may be called multiple times for a single connection since SSH2 allows 175146998Sdes * multiple sessions within a single connection. 176146998Sdes */ 177146998Sdesvoid 178146998Sdesaudit_run_command(const char *command) 179146998Sdes{ 180146998Sdes debug("audit run command euid %d user %s command '%.200s'", geteuid(), 181146998Sdes audit_username(), command); 182146998Sdes} 183146998Sdes# endif /* !defined CUSTOM_SSH_AUDIT_EVENTS */ 184146998Sdes#endif /* SSH_AUDIT_EVENTS */ 185