From 7731832751ab9f3c6ddeb66f186d3d7fa1934a6d Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 13:11:40 +0200
Subject: Adding upstream version 2.4.57+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 servers/slapd/ldapsync.c | 464 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 464 insertions(+)
 create mode 100644 servers/slapd/ldapsync.c

(limited to 'servers/slapd/ldapsync.c')

diff --git a/servers/slapd/ldapsync.c b/servers/slapd/ldapsync.c
new file mode 100644
index 0000000..3ba029f
--- /dev/null
+++ b/servers/slapd/ldapsync.c
@@ -0,0 +1,464 @@
+/* ldapsync.c -- LDAP Content Sync Routines */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2003 IBM Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "lutil.h"
+#include "slap.h"
+#include "../../libraries/liblber/lber-int.h" /* get ber_strndup() */
+#include "lutil_ldap.h"
+
+struct slap_sync_cookie_s slap_sync_cookie =
+	LDAP_STAILQ_HEAD_INITIALIZER( slap_sync_cookie );
+
+void
+slap_compose_sync_cookie(
+	Operation *op,
+	struct berval *cookie,
+	BerVarray csn,
+	int rid,
+	int sid )
+{
+	int len, numcsn = 0;
+
+	if ( csn ) {
+		for (; !BER_BVISNULL( &csn[numcsn] ); numcsn++);
+	}
+
+	if ( numcsn == 0 || rid == -1 ) {
+		char cookiestr[ LDAP_PVT_CSNSTR_BUFSIZE + 20 ];
+		if ( rid == -1 ) {
+			cookiestr[0] = '\0';
+			len = 0;
+		} else {
+			len = snprintf( cookiestr, sizeof( cookiestr ),
+					"rid=%03d", rid );
+			if ( sid >= 0 ) {
+				len += sprintf( cookiestr+len, ",sid=%03x", sid );
+			}
+		}
+		ber_str2bv_x( cookiestr, len, 1, cookie, 
+			op ? op->o_tmpmemctx : NULL );
+	} else {
+		char *ptr;
+		int i;
+
+		len = 0;
+		for ( i=0; i<numcsn; i++)
+			len += csn[i].bv_len + 1;
+
+		len += STRLENOF("rid=123,csn=");
+		if ( sid >= 0 )
+			len += STRLENOF("sid=xxx,");
+
+		cookie->bv_val = slap_sl_malloc( len, op ? op->o_tmpmemctx : NULL );
+
+		len = sprintf( cookie->bv_val, "rid=%03d,", rid );
+		ptr = cookie->bv_val + len;
+		if ( sid >= 0 ) {
+			ptr += sprintf( ptr, "sid=%03x,", sid );
+		}
+		ptr = lutil_strcopy( ptr, "csn=" );
+		for ( i=0; i<numcsn; i++) {
+			ptr = lutil_strncopy( ptr, csn[i].bv_val, csn[i].bv_len );
+			*ptr++ = ';';
+		}
+		ptr--;
+		*ptr = '\0';
+		cookie->bv_len = ptr - cookie->bv_val;
+	}
+}
+
+void
+slap_sync_cookie_free(
+	struct sync_cookie *cookie,
+	int free_cookie
+)
+{
+	if ( cookie == NULL )
+		return;
+
+	if ( cookie->sids ) {
+		ch_free( cookie->sids );
+		cookie->sids = NULL;
+	}
+
+	if ( cookie->ctxcsn ) {
+		ber_bvarray_free( cookie->ctxcsn );
+		cookie->ctxcsn = NULL;
+	}
+	cookie->numcsns = 0;
+	if ( !BER_BVISNULL( &cookie->octet_str )) {
+		ch_free( cookie->octet_str.bv_val );
+		BER_BVZERO( &cookie->octet_str );
+	}
+
+	if ( free_cookie ) {
+		ch_free( cookie );
+	}
+
+	return;
+}
+
+int
+slap_parse_csn_sid( struct berval *csnp )
+{
+	char *p, *q;
+	struct berval csn = *csnp;
+	int i;
+
+	p = ber_bvchr( &csn, '#' );
+	if ( !p )
+		return -1;
+	p++;
+	csn.bv_len -= p - csn.bv_val;
+	csn.bv_val = p;
+
+	p = ber_bvchr( &csn, '#' );
+	if ( !p )
+		return -1;
+	p++;
+	csn.bv_len -= p - csn.bv_val;
+	csn.bv_val = p;
+
+	q = ber_bvchr( &csn, '#' );
+	if ( !q )
+		return -1;
+
+	csn.bv_len = q - p;
+
+	i = strtol( p, &q, 16 );
+	if ( p == q || q != p + csn.bv_len || i < 0 || i > SLAP_SYNC_SID_MAX ) {
+		i = -1;
+	}
+
+	return i;
+}
+
+int *
+slap_parse_csn_sids( BerVarray csns, int numcsns, void *memctx )
+{
+	int i, *ret;
+
+	ret = slap_sl_malloc( numcsns * sizeof(int), memctx );
+	for ( i=0; i<numcsns; i++ ) {
+		ret[i] = slap_parse_csn_sid( &csns[i] );
+	}
+	return ret;
+}
+
+static slap_mr_match_func sidsort_cmp;
+
+static const MatchingRule sidsort_mr = {
+	{ 0 },
+	NULL,
+	{ 0 },
+	{ 0 },
+	0,
+	NULL, NULL, NULL, sidsort_cmp
+};
+static const AttributeType sidsort_at = {
+	{ 0 },
+	{ 0 },
+	NULL, NULL, (MatchingRule *)&sidsort_mr,
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, SLAP_AT_SORTED_VAL
+};
+static const AttributeDescription sidsort_ad = {
+	NULL,
+	(AttributeType *)&sidsort_at
+};
+
+static int
+sidsort_cmp(
+	int *matchp,
+	slap_mask_t flags,
+	Syntax *syntax,
+	MatchingRule *mr,
+	struct berval *b1,
+	void *v2 )
+{
+	struct berval *b2 = v2;
+	*matchp = b1->bv_len - b2->bv_len;
+	return LDAP_SUCCESS;
+}
+
+/* sort CSNs by SID. Use a fake Attribute with our own
+ * syntax and matching rule, which sorts the nvals by
+ * bv_len order. Stuff our sids into the bv_len.
+ */
+int
+slap_sort_csn_sids( BerVarray csns, int *sids, int numcsns, void *memctx )
+{
+	Attribute a;
+	const char *text;
+	int i, rc;
+
+	a.a_desc = (AttributeDescription *)&sidsort_ad;
+	a.a_nvals = slap_sl_malloc( numcsns * sizeof(struct berval), memctx );
+	for ( i=0; i<numcsns; i++ ) {
+		a.a_nvals[i].bv_len = sids[i];
+		a.a_nvals[i].bv_val = NULL;
+	}
+	a.a_vals = csns;
+	a.a_numvals = numcsns;
+	a.a_flags = 0;
+	rc = slap_sort_vals( (Modifications *)&a, &text, &i, memctx );
+	for ( i=0; i<numcsns; i++ )
+		sids[i] = a.a_nvals[i].bv_len;
+	slap_sl_free( a.a_nvals, memctx );
+	return rc;
+}
+
+void
+slap_insert_csn_sids(
+	struct sync_cookie *ck,
+	int pos,
+	int sid,
+	struct berval *csn
+)
+{
+	int i;
+	ck->numcsns++;
+	ck->ctxcsn = ch_realloc( ck->ctxcsn,
+		(ck->numcsns+1) * sizeof(struct berval));
+	BER_BVZERO( &ck->ctxcsn[ck->numcsns] );
+	ck->sids = ch_realloc( ck->sids, ck->numcsns * sizeof(int));
+	for ( i = ck->numcsns-1; i > pos; i-- ) {
+		ck->ctxcsn[i] = ck->ctxcsn[i-1];
+		ck->sids[i] = ck->sids[i-1];
+	}
+	ck->sids[i] = sid;
+	ber_dupbv( &ck->ctxcsn[i], csn );
+}
+
+int
+slap_parse_sync_cookie(
+	struct sync_cookie *cookie,
+	void *memctx
+)
+{
+	char *csn_ptr;
+	char *csn_str;
+	char *cval;
+	char *next, *end;
+	AttributeDescription *ad = slap_schema.si_ad_entryCSN;
+
+	if ( cookie == NULL )
+		return -1;
+
+	if ( cookie->octet_str.bv_len <= STRLENOF( "rid=" ) )
+		return -1;
+
+	cookie->rid = -1;
+	cookie->sid = -1;
+	cookie->ctxcsn = NULL;
+	cookie->sids = NULL;
+	cookie->numcsns = 0;
+
+	end = cookie->octet_str.bv_val + cookie->octet_str.bv_len;
+
+	for ( next=cookie->octet_str.bv_val; next < end; ) {
+		if ( !strncmp( next, "rid=", STRLENOF("rid=") )) {
+			char *rid_ptr = next;
+			cookie->rid = strtol( &rid_ptr[ STRLENOF( "rid=" ) ], &next, 10 );
+			if ( next == rid_ptr ||
+				next > end ||
+				( *next && *next != ',' ) ||
+				cookie->rid < 0 ||
+				cookie->rid > SLAP_SYNC_RID_MAX )
+			{
+				return -1;
+			}
+			if ( *next == ',' ) {
+				next++;
+			}
+			if ( !ad ) {
+				break;
+			}
+			continue;
+		}
+		if ( !strncmp( next, "sid=", STRLENOF("sid=") )) {
+			char *sid_ptr = next;
+			sid_ptr = next;
+			cookie->sid = strtol( &sid_ptr[ STRLENOF( "sid=" ) ], &next, 16 );
+			if ( next == sid_ptr ||
+				next > end ||
+				( *next && *next != ',' ) ||
+				cookie->sid < 0 ||
+				cookie->sid > SLAP_SYNC_SID_MAX )
+			{
+				return -1;
+			}
+			if ( *next == ',' ) {
+				next++;
+			}
+			continue;
+		}
+		if ( !strncmp( next, "csn=", STRLENOF("csn=") )) {
+			struct berval stamp;
+
+			next += STRLENOF("csn=");
+			while ( next < end ) {
+				csn_str = next;
+				csn_ptr = strchr( csn_str, '#' );
+				if ( !csn_ptr || csn_ptr > end )
+					break;
+				/* ad will be NULL when called from main. we just
+				 * want to parse the rid then. But we still iterate
+				 * through the string to find the end.
+				 */
+				cval = strchr( csn_ptr, ';' );
+				if ( !cval )
+					cval = strchr(csn_ptr, ',' );
+				if ( cval )
+					stamp.bv_len = cval - csn_str;
+				else
+					stamp.bv_len = end - csn_str;
+				if ( ad ) {
+					struct berval bv;
+					stamp.bv_val = csn_str;
+					if ( ad->ad_type->sat_syntax->ssyn_validate(
+						ad->ad_type->sat_syntax, &stamp ) != LDAP_SUCCESS )
+						break;
+					if ( ad->ad_type->sat_equality->smr_normalize(
+						SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
+						ad->ad_type->sat_syntax,
+						ad->ad_type->sat_equality,
+						&stamp, &bv, memctx ) != LDAP_SUCCESS )
+						break;
+					ber_bvarray_add_x( &cookie->ctxcsn, &bv, memctx );
+					cookie->numcsns++;
+				}
+				if ( cval ) {
+					next = cval + 1;
+					if ( *cval != ';' )
+						break;
+				} else {
+					next = end;
+					break;
+				}
+			}
+			continue;
+		}
+		next++;
+	}
+	if ( cookie->numcsns ) {
+		cookie->sids = slap_parse_csn_sids( cookie->ctxcsn, cookie->numcsns,
+			memctx );
+		if ( cookie->numcsns > 1 )
+			slap_sort_csn_sids( cookie->ctxcsn, cookie->sids, cookie->numcsns, memctx );
+	}
+	return 0;
+}
+
+/* count the numcsns and regenerate the list of SIDs in a recomposed cookie */
+void
+slap_reparse_sync_cookie(
+	struct sync_cookie *cookie,
+	void *memctx )
+{
+	if ( cookie->ctxcsn ) {
+		for (; !BER_BVISNULL( &cookie->ctxcsn[cookie->numcsns] ); cookie->numcsns++);
+	}
+	if ( cookie->numcsns ) {
+		cookie->sids = slap_parse_csn_sids( cookie->ctxcsn, cookie->numcsns, NULL );
+		if ( cookie->numcsns > 1 )
+			slap_sort_csn_sids( cookie->ctxcsn, cookie->sids, cookie->numcsns, memctx );
+	}
+}
+
+int
+slap_init_sync_cookie_ctxcsn(
+	struct sync_cookie *cookie
+)
+{
+	char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE + 4 ];
+	struct berval octet_str = BER_BVNULL;
+	struct berval ctxcsn = BER_BVNULL;
+
+	if ( cookie == NULL )
+		return -1;
+
+	octet_str.bv_len = snprintf( csnbuf, LDAP_PVT_CSNSTR_BUFSIZE + 4,
+					"csn=%4d%02d%02d%02d%02d%02dZ#%06x#%02x#%06x",
+					1900, 1, 1, 0, 0, 0, 0, 0, 0 );
+	octet_str.bv_val = csnbuf;
+	ch_free( cookie->octet_str.bv_val );
+	ber_dupbv( &cookie->octet_str, &octet_str );
+
+	ctxcsn.bv_val = octet_str.bv_val + 4;
+	ctxcsn.bv_len = octet_str.bv_len - 4;
+	cookie->ctxcsn = NULL;
+	value_add_one( &cookie->ctxcsn, &ctxcsn );
+	cookie->numcsns = 1;
+	cookie->sid = -1;
+
+	return 0;
+}
+
+struct sync_cookie *
+slap_dup_sync_cookie(
+	struct sync_cookie *dst,
+	struct sync_cookie *src
+)
+{
+	struct sync_cookie *new;
+	int i;
+
+	if ( src == NULL )
+		return NULL;
+
+	if ( dst ) {
+		ber_bvarray_free( dst->ctxcsn );
+		dst->ctxcsn = NULL;
+		dst->sids = NULL;
+		ch_free( dst->octet_str.bv_val );
+		BER_BVZERO( &dst->octet_str );
+		new = dst;
+	} else {
+		new = ( struct sync_cookie * )
+				ch_calloc( 1, sizeof( struct sync_cookie ));
+	}
+
+	new->rid = src->rid;
+	new->sid = src->sid;
+	new->numcsns = src->numcsns;
+
+	if ( src->numcsns ) {
+		if ( ber_bvarray_dup_x( &new->ctxcsn, src->ctxcsn, NULL )) {
+			if ( !dst ) {
+				ch_free( new );
+			}
+			return NULL;
+		}
+		new->sids = ch_malloc( src->numcsns * sizeof(int) );
+		for (i=0; i<src->numcsns; i++)
+			new->sids[i] = src->sids[i];
+	}
+
+	if ( !BER_BVISNULL( &src->octet_str )) {
+		ber_dupbv( &new->octet_str, &src->octet_str );
+	}
+
+	return new;
+}
+
-- 
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