auditlog.c revision 1.2 
1/*	$NetBSD: auditlog.c,v 1.2 2020/08/11 13:15:42 christos Exp $	*/
2
3/* auditlog.c - log modifications for audit/history purposes */
4/* $OpenLDAP$ */
5/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
6 *
7 * Copyright 2005-2020 The OpenLDAP Foundation.
8 * Portions copyright 2004-2005 Symas Corporation.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted only as authorized by the OpenLDAP
13 * Public License.
14 *
15 * A copy of this license is available in the file LICENSE in the
16 * top-level directory of the distribution or, alternatively, at
17 * <http://www.OpenLDAP.org/license.html>.
18 */
19/* ACKNOWLEDGEMENTS:
20 * This work was initially developed by Symas Corp. for inclusion in
21 * OpenLDAP Software.  This work was sponsored by Hewlett-Packard.
22 */
23
24#include <sys/cdefs.h>
25__RCSID("$NetBSD: auditlog.c,v 1.2 2020/08/11 13:15:42 christos Exp $");
26
27#include "portable.h"
28
29#ifdef SLAPD_OVER_AUDITLOG
30
31#include <stdio.h>
32
33#include <ac/string.h>
34#include <ac/ctype.h>
35
36#include "slap.h"
37#include "config.h"
38#include "ldif.h"
39
40typedef struct auditlog_data {
41	ldap_pvt_thread_mutex_t ad_mutex;
42	char *ad_logfile;
43} auditlog_data;
44
45static ConfigTable auditlogcfg[] = {
46	{ "auditlog", "filename", 2, 2, 0,
47	  ARG_STRING|ARG_OFFSET,
48	  (void *)offsetof(auditlog_data, ad_logfile),
49	  "( OLcfgOvAt:15.1 NAME 'olcAuditlogFile' "
50	  "DESC 'Filename for auditlogging' "
51	  "SYNTAX OMsDirectoryString )", NULL, NULL },
52	{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
53};
54
55static ConfigOCs auditlogocs[] = {
56	{ "( OLcfgOvOc:15.1 "
57	  "NAME 'olcAuditlogConfig' "
58	  "DESC 'Auditlog configuration' "
59	  "SUP olcOverlayConfig "
60	  "MAY ( olcAuditlogFile ) )",
61	  Cft_Overlay, auditlogcfg },
62	{ NULL, 0, NULL }
63};
64
65static int fprint_ldif(FILE *f, char *name, char *val, ber_len_t len) {
66	char *s;
67	if((s = ldif_put(LDIF_PUT_VALUE, name, val, len)) == NULL)
68		return(-1);
69	fputs(s, f);
70	ber_memfree(s);
71	return(0);
72}
73
74static int auditlog_response(Operation *op, SlapReply *rs) {
75	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
76	auditlog_data *ad = on->on_bi.bi_private;
77	FILE *f;
78	Attribute *a;
79	Modifications *m;
80	struct berval *b, *who = NULL, peername;
81	char *what, *whatm, *suffix;
82	time_t stamp;
83	int i;
84
85	if ( rs->sr_err != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
86
87	if ( !ad->ad_logfile ) return SLAP_CB_CONTINUE;
88
89/*
90** add or modify: use modifiersName if present
91**
92*/
93	switch(op->o_tag) {
94		case LDAP_REQ_MODRDN:	what = "modrdn";	break;
95		case LDAP_REQ_DELETE:	what = "delete";	break;
96		case LDAP_REQ_ADD:
97			what = "add";
98			for(a = op->ora_e->e_attrs; a; a = a->a_next)
99				if( a->a_desc == slap_schema.si_ad_modifiersName ) {
100					who = &a->a_vals[0];
101					break;
102				}
103			break;
104		case LDAP_REQ_MODIFY:
105			what = "modify";
106			for(m = op->orm_modlist; m; m = m->sml_next)
107				if( m->sml_desc == slap_schema.si_ad_modifiersName &&
108					( m->sml_op == LDAP_MOD_ADD ||
109					m->sml_op == LDAP_MOD_REPLACE )) {
110					who = &m->sml_values[0];
111					break;
112				}
113			break;
114		default:
115			return SLAP_CB_CONTINUE;
116	}
117
118	suffix = op->o_bd->be_suffix[0].bv_len ? op->o_bd->be_suffix[0].bv_val :
119		"global";
120
121/*
122** note: this means requestor's dn when modifiersName is null
123*/
124	if ( !who )
125		who = &op->o_dn;
126
127	peername = op->o_conn->c_peer_name;
128	ldap_pvt_thread_mutex_lock(&ad->ad_mutex);
129	if((f = fopen(ad->ad_logfile, "a")) == NULL) {
130		ldap_pvt_thread_mutex_unlock(&ad->ad_mutex);
131		return SLAP_CB_CONTINUE;
132	}
133
134	stamp = slap_get_time();
135	fprintf(f, "# %s %ld %s%s%s %s conn=%ld\n",
136		what, (long)stamp, suffix, who ? " " : "", who ? who->bv_val : "",
137		peername.bv_val ? peername.bv_val: "", op->o_conn->c_connid);
138
139	if ( !BER_BVISEMPTY( &op->o_conn->c_dn ) &&
140		(!who || !dn_match( who, &op->o_conn->c_dn )))
141		fprintf(f, "# realdn: %s\n", op->o_conn->c_dn.bv_val );
142
143	fprintf(f, "dn: %s\nchangetype: %s\n",
144		op->o_req_dn.bv_val, what);
145
146	switch(op->o_tag) {
147	  case LDAP_REQ_ADD:
148		for(a = op->ora_e->e_attrs; a; a = a->a_next)
149		  if((b = a->a_vals) != NULL)
150			for(i = 0; b[i].bv_val; i++)
151				fprint_ldif(f, a->a_desc->ad_cname.bv_val, b[i].bv_val, b[i].bv_len);
152		break;
153
154	  case LDAP_REQ_MODIFY:
155		for(m = op->orm_modlist; m; m = m->sml_next) {
156			switch(m->sml_op & LDAP_MOD_OP) {
157				case LDAP_MOD_ADD:	 whatm = "add";		break;
158				case LDAP_MOD_REPLACE:	 whatm = "replace";	break;
159				case LDAP_MOD_DELETE:	 whatm = "delete";	break;
160				case LDAP_MOD_INCREMENT: whatm = "increment";	break;
161				default:
162					fprintf(f, "# MOD_TYPE_UNKNOWN:%02x\n", m->sml_op & LDAP_MOD_OP);
163					continue;
164			}
165			fprintf(f, "%s: %s\n", whatm, m->sml_desc->ad_cname.bv_val);
166			if((b = m->sml_values) != NULL)
167			  for(i = 0; b[i].bv_val; i++)
168				fprint_ldif(f, m->sml_desc->ad_cname.bv_val, b[i].bv_val, b[i].bv_len);
169			fprintf(f, "-\n");
170		}
171		break;
172
173	  case LDAP_REQ_MODRDN:
174		fprintf(f, "newrdn: %s\ndeleteoldrdn: %s\n",
175			op->orr_newrdn.bv_val, op->orr_deleteoldrdn ? "1" : "0");
176		if(op->orr_newSup) fprintf(f, "newsuperior: %s\n", op->orr_newSup->bv_val);
177		break;
178
179	  case LDAP_REQ_DELETE:
180		/* nothing else needed */
181		break;
182	}
183
184	fprintf(f, "# end %s %ld\n\n", what, (long)stamp);
185
186	fclose(f);
187	ldap_pvt_thread_mutex_unlock(&ad->ad_mutex);
188	return SLAP_CB_CONTINUE;
189}
190
191static slap_overinst auditlog;
192
193static int
194auditlog_db_init(
195	BackendDB *be,
196	ConfigReply *cr
197)
198{
199	slap_overinst *on = (slap_overinst *)be->bd_info;
200	auditlog_data *ad = ch_calloc(1, sizeof(auditlog_data));
201
202	on->on_bi.bi_private = ad;
203	ldap_pvt_thread_mutex_init( &ad->ad_mutex );
204	return 0;
205}
206
207static int
208auditlog_db_destroy(
209	BackendDB *be,
210	ConfigReply *cr
211)
212{
213	slap_overinst *on = (slap_overinst *)be->bd_info;
214	auditlog_data *ad = on->on_bi.bi_private;
215
216	ldap_pvt_thread_mutex_destroy( &ad->ad_mutex );
217	free( ad->ad_logfile );
218	free( ad );
219	return 0;
220}
221
222int auditlog_initialize() {
223	int rc;
224
225	auditlog.on_bi.bi_type = "auditlog";
226	auditlog.on_bi.bi_db_init = auditlog_db_init;
227	auditlog.on_bi.bi_db_destroy = auditlog_db_destroy;
228	auditlog.on_response = auditlog_response;
229
230	auditlog.on_bi.bi_cf_ocs = auditlogocs;
231	rc = config_register_schema( auditlogcfg, auditlogocs );
232	if ( rc ) return rc;
233
234	return overlay_register(&auditlog);
235}
236
237#if SLAPD_OVER_AUDITLOG == SLAPD_MOD_DYNAMIC && defined(PIC)
238int
239init_module( int argc, char *argv[] )
240{
241	return auditlog_initialize();
242}
243#endif
244
245#endif /* SLAPD_OVER_AUDITLOG */
246