1 /* $Id: audit-bsm.c,v 1.5 2006/09/30 22:09:50 dtucker Exp $ */
6 * - deal with overlap between this and sys_auth_allowed_user
7 * sys_auth_record_login and record_failed_login.
11 * Copyright 1988-2002 Sun Microsystems, Inc. All rights reserved.
12 * Use is subject to license terms.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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35 /* #pragma ident "@(#)bsmaudit.c 1.1 01/09/17 SMI" */
39 #if defined(USE_BSM_AUDIT)
41 #include <sys/types.h>
55 # define AUE_openssh 32800
57 #include <bsm/audit.h>
58 #include <bsm/libbsm.h>
59 #include <bsm/audit_uevents.h>
60 #include <bsm/audit_record.h>
63 #if defined(HAVE_GETAUDIT_ADDR)
64 #define AuditInfoStruct auditinfo_addr
65 #define AuditInfoTermID au_tid_addr_t
66 #define GetAuditFunc(a,b) getaudit_addr((a),(b))
67 #define GetAuditFuncText "getaudit_addr"
68 #define SetAuditFunc(a,b) setaudit_addr((a),(b))
69 #define SetAuditFuncText "setaudit_addr"
70 #define AUToSubjectFunc au_to_subject_ex
71 #define AUToReturnFunc(a,b) au_to_return32((a), (int32_t)(b))
73 #define AuditInfoStruct auditinfo
74 #define AuditInfoTermID au_tid_t
75 #define GetAuditFunc(a,b) getaudit(a)
76 #define GetAuditFuncText "getaudit"
77 #define SetAuditFunc(a,b) setaudit(a)
78 #define SetAuditFuncText "setaudit"
79 #define AUToSubjectFunc au_to_subject
80 #define AUToReturnFunc(a,b) au_to_return((a), (u_int)(b))
83 extern int cannot_audit(int);
84 extern void aug_init(void);
85 extern dev_t aug_get_port(void);
86 extern int aug_get_machine(char *, u_int32_t *, u_int32_t *);
87 extern void aug_save_auid(au_id_t);
88 extern void aug_save_uid(uid_t);
89 extern void aug_save_euid(uid_t);
90 extern void aug_save_gid(gid_t);
91 extern void aug_save_egid(gid_t);
92 extern void aug_save_pid(pid_t);
93 extern void aug_save_asid(au_asid_t);
94 extern void aug_save_tid(dev_t, unsigned int);
95 extern void aug_save_tid_ex(dev_t, u_int32_t *, u_int32_t);
96 extern int aug_save_me(void);
97 extern int aug_save_namask(void);
98 extern void aug_save_event(au_event_t);
99 extern void aug_save_sorf(int);
100 extern void aug_save_text(char *);
101 extern void aug_save_text1(char *);
102 extern void aug_save_text2(char *);
103 extern void aug_save_na(int);
104 extern void aug_save_user(char *);
105 extern void aug_save_path(char *);
106 extern int aug_save_policy(void);
107 extern void aug_save_afunc(int (*)(int));
108 extern int aug_audit(void);
109 extern int aug_na_selected(void);
110 extern int aug_selected(void);
111 extern int aug_daemon_session(void);
114 # define gettext(a) (a)
117 extern Authctxt *the_authctxt;
118 static AuditInfoTermID ssh_bsm_tid;
120 /* Below is the low-level BSM interface code */
123 * Check if the specified event is selected (enabled) for auditing.
124 * Returns 1 if the event is selected, 0 if not and -1 on failure.
127 selected(char *username, uid_t uid, au_event_t event, int sf)
133 mask.am_success = mask.am_failure = 0;
135 /* get flags for non-attributable (to a real user) events */
136 rc = getacna(naflags, sizeof(naflags));
138 (void) getauditflagsbin(naflags, &mask);
140 rc = au_user_mask(username, &mask);
142 sorf = (sf == 0) ? AU_PRS_SUCCESS : AU_PRS_FAILURE;
143 return(au_preselect(event, &mask, sorf, AU_PRS_REREAD));
147 bsm_audit_record(int typ, char *string, au_event_t event_no)
152 pid_t pid = getpid();
153 AuditInfoTermID tid = ssh_bsm_tid;
155 if (the_authctxt != NULL && the_authctxt->valid) {
156 uid = the_authctxt->pw->pw_uid;
157 gid = the_authctxt->pw->pw_gid;
160 rc = (typ == 0) ? 0 : -1;
161 sel = selected(the_authctxt->user, uid, event_no, rc);
162 debug3("BSM audit: typ %d rc %d \"%s\"", typ, rc, string);
164 return; /* audit event does not match mask, do not write */
166 debug3("BSM audit: writing audit new record");
169 (void) au_write(ad, AUToSubjectFunc(uid, uid, gid, uid, gid,
171 (void) au_write(ad, au_to_text(string));
172 (void) au_write(ad, AUToReturnFunc(typ, rc));
174 rc = au_close(ad, AU_TO_WRITE, event_no);
176 error("BSM audit: %s failed to write \"%s\" record: %s",
177 __func__, string, strerror(errno));
181 bsm_audit_session_setup(void)
184 struct AuditInfoStruct info;
187 if (the_authctxt == NULL) {
188 error("BSM audit: session setup internal error (NULL ctxt)");
192 if (the_authctxt->valid)
193 info.ai_auid = the_authctxt->pw->pw_uid;
196 info.ai_asid = getpid();
200 (void) au_user_mask(the_authctxt->user, &mask);
202 info.ai_mask.am_success = mask.am_success;
203 info.ai_mask.am_failure = mask.am_failure;
205 info.ai_termid = ssh_bsm_tid;
207 rc = SetAuditFunc(&info, sizeof(info));
209 error("BSM audit: %s: %s failed: %s", __func__,
210 SetAuditFuncText, strerror(errno));
214 bsm_audit_bad_login(const char *what)
216 char textbuf[BSM_TEXTBUFSZ];
218 if (the_authctxt->valid) {
219 (void) snprintf(textbuf, sizeof (textbuf),
220 gettext("invalid %s for user %s"),
221 what, the_authctxt->user);
222 bsm_audit_record(4, textbuf, AUE_openssh);
224 (void) snprintf(textbuf, sizeof (textbuf),
225 gettext("invalid user name \"%s\""),
227 bsm_audit_record(3, textbuf, AUE_openssh);
231 /* Below is the sshd audit API code */
234 audit_connection_from(const char *host, int port)
236 AuditInfoTermID *tid = &ssh_bsm_tid;
241 debug3("BSM audit: connection from %.100s port %d", host, port);
243 /* populate our terminal id structure */
244 #if defined(HAVE_GETAUDIT_ADDR)
245 tid->at_port = (dev_t)port;
246 aug_get_machine((char *)host, &(tid->at_addr[0]), &(tid->at_type));
247 snprintf(buf, sizeof(buf), "%08x %08x %08x %08x", tid->at_addr[0],
248 tid->at_addr[1], tid->at_addr[2], tid->at_addr[3]);
249 debug3("BSM audit: iptype %d machine ID %s", (int)tid->at_type, buf);
251 /* this is used on IPv4-only machines */
252 tid->port = (dev_t)port;
253 tid->machine = inet_addr(host);
254 snprintf(buf, sizeof(buf), "%08x", tid->machine);
255 debug3("BSM audit: machine ID %s", buf);
260 audit_run_command(const char *command)
262 /* not implemented */
266 audit_session_open(const char *ttyn)
268 /* not implemented */
272 audit_session_close(const char *ttyn)
274 /* not implemented */
278 audit_event(ssh_audit_event_t event)
280 char textbuf[BSM_TEXTBUFSZ];
281 static int logged_in = 0;
282 const char *user = the_authctxt ? the_authctxt->user : "(unknown user)";
288 case SSH_AUTH_SUCCESS:
290 bsm_audit_session_setup();
291 snprintf(textbuf, sizeof(textbuf),
292 gettext("successful login %s"), user);
293 bsm_audit_record(0, textbuf, AUE_openssh);
296 case SSH_CONNECTION_CLOSE:
298 * We can also get a close event if the user attempted auth
299 * but never succeeded.
302 snprintf(textbuf, sizeof(textbuf),
303 gettext("sshd logout %s"), the_authctxt->user);
304 bsm_audit_record(0, textbuf, AUE_logout);
306 debug("%s: connection closed without authentication",
313 gettext("logins disabled by /etc/nologin"), AUE_openssh);
316 case SSH_LOGIN_EXCEED_MAXTRIES:
317 snprintf(textbuf, sizeof(textbuf),
318 gettext("too many tries for user %s"), the_authctxt->user);
319 bsm_audit_record(1, textbuf, AUE_openssh);
322 case SSH_LOGIN_ROOT_DENIED:
323 bsm_audit_record(2, gettext("not_console"), AUE_openssh);
326 case SSH_AUTH_FAIL_PASSWD:
327 bsm_audit_bad_login("password");
330 case SSH_AUTH_FAIL_KBDINT:
331 bsm_audit_bad_login("interactive password entry");
335 debug("%s: unhandled event %d", __func__, event);