1/* ldif.c - routines for dealing with LDIF files */
2/* $OpenLDAP: pkg/ldap/libraries/liblutil/ldif.c,v 1.15.2.9 2010/04/13 20:23:06 kurt Exp $ */
3/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 1998-2010 The OpenLDAP Foundation.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16/* Portions Copyright (c) 1992-1996 Regents of the University of Michigan.
17 * All rights reserved.
18 *
19 * Redistribution and use in source and binary forms are permitted
20 * provided that this notice is preserved and that due credit is given
21 * to the University of Michigan at Ann Arbor.  The name of the
22 * University may not be used to endorse or promote products derived
23 * from this software without specific prior written permission.  This
24 * software is provided ``as is'' without express or implied warranty.
25 */
26/* This work was originally developed by the University of Michigan
27 * and distributed as part of U-MICH LDAP.
28 */
29
30#include "portable.h"
31
32#include <stdio.h>
33
34#include <ac/stdlib.h>
35#include <ac/ctype.h>
36
37#include <ac/string.h>
38#include <ac/socket.h>
39#include <ac/time.h>
40
41int ldif_debug = 0;
42
43#include "ldap_log.h"
44#include "lber_pvt.h"
45#include "ldif.h"
46
47#define RIGHT2			0x03
48#define RIGHT4			0x0f
49#define CONTINUED_LINE_MARKER	'\r'
50
51#ifdef CSRIMALLOC
52#define ber_memalloc malloc
53#define ber_memcalloc calloc
54#define ber_memrealloc realloc
55#define ber_strdup strdup
56#endif
57
58static const char nib2b64[0x40] =
59        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
60
61static const unsigned char b642nib[0x80] = {
62	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
63	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
64	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
65	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
66	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
67	0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
68	0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
69	0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
70	0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
71	0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
72	0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
73	0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
74	0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
75	0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
76	0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
77	0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
78};
79
80/*
81 * ldif_parse_line - takes a line of the form "type:[:] value" and splits it
82 * into components "type" and "value".  if a double colon separates type from
83 * value, then value is encoded in base 64, and parse_line un-decodes it
84 * (in place) before returning. The type and value are stored in malloc'd
85 * memory which must be freed by the caller.
86 *
87 * ldif_parse_line2 - operates in-place on input buffer, returning type
88 * in-place. Will return value in-place if possible, (must malloc for
89 * fetched URLs). If freeval is NULL, all return data will be malloc'd
90 * and the input line will be unmodified. Otherwise freeval is set to
91 * True if the value was malloc'd.
92 */
93
94int
95ldif_parse_line(
96    LDAP_CONST char	*line,
97    char	**typep,
98    char	**valuep,
99    ber_len_t *vlenp
100)
101{
102	struct berval type, value;
103	int rc = ldif_parse_line2( (char *)line, &type, &value, NULL );
104
105	*typep = type.bv_val;
106	*valuep = value.bv_val;
107	*vlenp = value.bv_len;
108	return rc;
109}
110
111int
112ldif_parse_line2(
113    char	*line,
114	struct berval *type,
115	struct berval *value,
116	int		*freeval
117)
118{
119	char	*s, *p, *d;
120	char	nib;
121	int	b64, url;
122
123	BER_BVZERO( type );
124	BER_BVZERO( value );
125
126	/* skip any leading space */
127	while ( isspace( (unsigned char) *line ) ) {
128		line++;
129	}
130
131	if ( freeval ) {
132		*freeval = 0;
133	} else {
134		line = ber_strdup( line );
135
136		if( line == NULL ) {
137			ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
138				_("ldif_parse_line: line malloc failed\n"));
139			return( -1 );
140		}
141	}
142
143	type->bv_val = line;
144
145	s = strchr( type->bv_val, ':' );
146
147	if ( s == NULL ) {
148		ber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
149			_("ldif_parse_line: missing ':' after %s\n"),
150			type->bv_val );
151		if ( !freeval ) ber_memfree( line );
152		return( -1 );
153	}
154
155	/* trim any space between type and : */
156	for ( p = &s[-1]; p > type->bv_val && isspace( * (unsigned char *) p ); p-- ) {
157		*p = '\0';
158	}
159	*s++ = '\0';
160	type->bv_len = s - type->bv_val - 1;
161
162	url = 0;
163	b64 = 0;
164
165	if ( *s == '<' ) {
166		s++;
167		url = 1;
168
169	} else if ( *s == ':' ) {
170		/* base 64 encoded value */
171		s++;
172		b64 = 1;
173	}
174
175	/* skip space between : and value */
176	while ( isspace( (unsigned char) *s ) ) {
177		s++;
178	}
179
180	/* check for continued line markers that should be deleted */
181	for ( p = s, d = s; *p; p++ ) {
182		if ( *p != CONTINUED_LINE_MARKER )
183			*d++ = *p;
184	}
185	*d = '\0';
186
187	if ( b64 ) {
188		char *byte = s;
189
190		if ( *s == '\0' ) {
191			/* no value is present, error out */
192			ber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
193				_("ldif_parse_line: %s missing base64 value\n"),
194				type->bv_val );
195			if ( !freeval ) ber_memfree( line );
196			return( -1 );
197		}
198
199		byte = value->bv_val = s;
200
201		for ( p = s, value->bv_len = 0; p < d; p += 4, value->bv_len += 3 ) {
202			int i;
203			for ( i = 0; i < 4; i++ ) {
204				if ( p[i] != '=' && (p[i] & 0x80 ||
205				    b642nib[ p[i] & 0x7f ] > 0x3f) ) {
206					ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
207						_("ldif_parse_line: %s: invalid base64 encoding"
208						" char (%c) 0x%x\n"),
209					    type->bv_val, p[i], p[i] );
210					if ( !freeval ) ber_memfree( line );
211					return( -1 );
212				}
213			}
214
215			/* first digit */
216			nib = b642nib[ p[0] & 0x7f ];
217			byte[0] = nib << 2;
218			/* second digit */
219			nib = b642nib[ p[1] & 0x7f ];
220			byte[0] |= nib >> 4;
221			byte[1] = (nib & RIGHT4) << 4;
222			/* third digit */
223			if ( p[2] == '=' ) {
224				value->bv_len += 1;
225				break;
226			}
227			nib = b642nib[ p[2] & 0x7f ];
228			byte[1] |= nib >> 2;
229			byte[2] = (nib & RIGHT2) << 6;
230			/* fourth digit */
231			if ( p[3] == '=' ) {
232				value->bv_len += 2;
233				break;
234			}
235			nib = b642nib[ p[3] & 0x7f ];
236			byte[2] |= nib;
237
238			byte += 3;
239		}
240		s[ value->bv_len ] = '\0';
241
242	} else if ( url ) {
243		if ( *s == '\0' ) {
244			/* no value is present, error out */
245			ber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
246				_("ldif_parse_line: %s missing URL value\n"),
247				type->bv_val );
248			if ( !freeval ) ber_memfree( line );
249			return( -1 );
250		}
251
252		if( ldif_fetch_url( s, &value->bv_val, &value->bv_len ) ) {
253			ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
254				_("ldif_parse_line: %s: URL \"%s\" fetch failed\n"),
255				type->bv_val, s );
256			if ( !freeval ) ber_memfree( line );
257			return( -1 );
258		}
259		if ( freeval ) *freeval = 1;
260
261	} else {
262		value->bv_val = s;
263		value->bv_len = (int) (d - s);
264	}
265
266	if ( !freeval ) {
267		struct berval bv = *type;
268
269		ber_dupbv( type, &bv );
270
271		if( BER_BVISNULL( type )) {
272			ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
273				_("ldif_parse_line: type malloc failed\n"));
274			if( url ) ber_memfree( value->bv_val );
275			ber_memfree( line );
276			return( -1 );
277		}
278
279		if( !url ) {
280			bv = *value;
281			ber_dupbv( value, &bv );
282			if( BER_BVISNULL( value )) {
283				ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
284					_("ldif_parse_line: value malloc failed\n"));
285				ber_memfree( type->bv_val );
286				ber_memfree( line );
287				return( -1 );
288			}
289		}
290
291		ber_memfree( line );
292	}
293
294	return( 0 );
295}
296
297/*
298 * ldif_getline - return the next "line" (minus newline) of input from a
299 * string buffer of lines separated by newlines, terminated by \n\n
300 * or \0.  this routine handles continued lines, bundling them into
301 * a single big line before returning.  if a line begins with a white
302 * space character, it is a continuation of the previous line. the white
303 * space character (nb: only one char), and preceeding newline are changed
304 * into CONTINUED_LINE_MARKER chars, to be deleted later by the
305 * ldif_parse_line() routine above.
306 *
307 * ldif_getline will skip over any line which starts '#'.
308 *
309 * ldif_getline takes a pointer to a pointer to the buffer on the first call,
310 * which it updates and must be supplied on subsequent calls.
311 */
312
313int
314ldif_countlines( LDAP_CONST char *buf )
315{
316	char *nl;
317	int ret = 0;
318
319	if ( !buf ) return ret;
320
321	for ( nl = strchr(buf, '\n'); nl; nl = strchr(nl, '\n') ) {
322		nl++;
323		if ( *nl != ' ' ) ret++;
324	}
325	return ret;
326}
327
328char *
329ldif_getline( char **next )
330{
331	char *line;
332
333	do {
334		if ( *next == NULL || **next == '\n' || **next == '\0' ) {
335			return( NULL );
336		}
337
338		line = *next;
339
340		while ( (*next = strchr( *next, '\n' )) != NULL ) {
341#if CONTINUED_LINE_MARKER != '\r'
342			if ( (*next)[-1] == '\r' ) {
343				(*next)[-1] = CONTINUED_LINE_MARKER;
344			}
345#endif
346
347			if ( (*next)[1] != ' ' ) {
348				if ( (*next)[1] == '\r' && (*next)[2] == '\n' ) {
349					*(*next)++ = '\0';
350				}
351				*(*next)++ = '\0';
352				break;
353			}
354
355			**next = CONTINUED_LINE_MARKER;
356			(*next)[1] = CONTINUED_LINE_MARKER;
357			(*next)++;
358		}
359	} while( *line == '#' );
360
361	return( line );
362}
363
364/*
365 * name and OID of attributeTypes that must be base64 encoded in any case
366 */
367typedef struct must_b64_encode_s {
368	struct berval	name;
369	struct berval	oid;
370} must_b64_encode_s;
371
372static must_b64_encode_s	default_must_b64_encode[] = {
373	{ BER_BVC( "userPassword" ), BER_BVC( "2.5.4.35" ) },
374	{ BER_BVNULL, BER_BVNULL }
375};
376
377static must_b64_encode_s	*must_b64_encode = default_must_b64_encode;
378
379/*
380 * register name and OID of attributeTypes that must always be base64
381 * encoded
382 *
383 * NOTE: this routine mallocs memory in a static struct which must
384 * be explicitly freed when no longer required
385 */
386int
387ldif_must_b64_encode_register( LDAP_CONST char *name, LDAP_CONST char *oid )
388{
389	int		i;
390	ber_len_t	len;
391
392	assert( must_b64_encode != NULL );
393	assert( name != NULL );
394	assert( oid != NULL );
395
396	len = strlen( name );
397
398	for ( i = 0; !BER_BVISNULL( &must_b64_encode[i].name ); i++ ) {
399		if ( len != must_b64_encode[i].name.bv_len ) {
400			continue;
401		}
402
403		if ( strcasecmp( name, must_b64_encode[i].name.bv_val ) == 0 ) {
404			break;
405		}
406	}
407
408	if ( !BER_BVISNULL( &must_b64_encode[i].name ) ) {
409		return 1;
410	}
411
412	for ( i = 0; !BER_BVISNULL( &must_b64_encode[i].name ); i++ )
413		/* just count */ ;
414
415	if ( must_b64_encode == default_must_b64_encode ) {
416		must_b64_encode = ber_memalloc( sizeof( must_b64_encode_s ) * ( i + 2 ) );
417
418		for ( i = 0; !BER_BVISNULL( &default_must_b64_encode[i].name ); i++ ) {
419			ber_dupbv( &must_b64_encode[i].name, &default_must_b64_encode[i].name );
420			ber_dupbv( &must_b64_encode[i].oid, &default_must_b64_encode[i].oid );
421		}
422
423	} else {
424		must_b64_encode_s	*tmp;
425
426		tmp = ber_memrealloc( must_b64_encode,
427			sizeof( must_b64_encode_s ) * ( i + 2 ) );
428		if ( tmp == NULL ) {
429			return 1;
430		}
431		must_b64_encode = tmp;
432	}
433
434	ber_str2bv( name, len, 1, &must_b64_encode[i].name );
435	ber_str2bv( oid, 0, 1, &must_b64_encode[i].oid );
436
437	BER_BVZERO( &must_b64_encode[i + 1].name );
438
439	return 0;
440}
441
442void
443ldif_must_b64_encode_release( void )
444{
445	int	i;
446
447	assert( must_b64_encode != NULL );
448
449	if ( must_b64_encode == default_must_b64_encode ) {
450		return;
451	}
452
453	for ( i = 0; !BER_BVISNULL( &must_b64_encode[i].name ); i++ ) {
454		ber_memfree( must_b64_encode[i].name.bv_val );
455		ber_memfree( must_b64_encode[i].oid.bv_val );
456	}
457
458	ber_memfree( must_b64_encode );
459
460	must_b64_encode = default_must_b64_encode;
461}
462
463/*
464 * returns 1 iff the string corresponds to the name or the OID of any
465 * of the attributeTypes listed in must_b64_encode
466 */
467static int
468ldif_must_b64_encode( LDAP_CONST char *s )
469{
470	int		i;
471	struct berval	bv;
472
473	assert( must_b64_encode != NULL );
474	assert( s != NULL );
475
476	ber_str2bv( s, 0, 0, &bv );
477
478	for ( i = 0; !BER_BVISNULL( &must_b64_encode[i].name ); i++ ) {
479		if ( ber_bvstrcasecmp( &must_b64_encode[i].name, &bv ) == 0
480			|| ber_bvcmp( &must_b64_encode[i].oid, &bv ) == 0 )
481		{
482			return 1;
483		}
484	}
485
486	return 0;
487}
488
489/* compatibility with U-Mich off by one bug */
490#define LDIF_KLUDGE 1
491
492void
493ldif_sput(
494	char **out,
495	int type,
496	LDAP_CONST char *name,
497	LDAP_CONST char *val,
498	ber_len_t vlen )
499{
500	const unsigned char *byte, *stop;
501	unsigned char	buf[3];
502	unsigned long	bits;
503	char		*save;
504	int		pad;
505	int		namelen = 0;
506
507	ber_len_t savelen;
508	ber_len_t len=0;
509	ber_len_t i;
510
511	/* prefix */
512	switch( type ) {
513	case LDIF_PUT_COMMENT:
514		*(*out)++ = '#';
515		len++;
516
517		if( vlen ) {
518			*(*out)++ = ' ';
519			len++;
520		}
521
522		break;
523
524	case LDIF_PUT_SEP:
525		*(*out)++ = '\n';
526		return;
527	}
528
529	/* name (attribute type) */
530	if( name != NULL ) {
531		/* put the name + ":" */
532		namelen = strlen(name);
533		strcpy(*out, name);
534		*out += namelen;
535		len += namelen;
536
537		if( type != LDIF_PUT_COMMENT ) {
538			*(*out)++ = ':';
539			len++;
540		}
541
542	}
543#ifdef LDAP_DEBUG
544	else {
545		assert( type == LDIF_PUT_COMMENT );
546	}
547#endif
548
549	if( vlen == 0 ) {
550		*(*out)++ = '\n';
551		return;
552	}
553
554	switch( type ) {
555	case LDIF_PUT_NOVALUE:
556		*(*out)++ = '\n';
557		return;
558
559	case LDIF_PUT_URL: /* url value */
560		*(*out)++ = '<';
561		len++;
562		break;
563
564	case LDIF_PUT_B64: /* base64 value */
565		*(*out)++ = ':';
566		len++;
567		break;
568	}
569
570	switch( type ) {
571	case LDIF_PUT_TEXT:
572	case LDIF_PUT_URL:
573	case LDIF_PUT_B64:
574		*(*out)++ = ' ';
575		len++;
576		/* fall-thru */
577
578	case LDIF_PUT_COMMENT:
579		/* pre-encoded names */
580		for ( i=0; i < vlen; i++ ) {
581			if ( len > LDIF_LINE_WIDTH ) {
582				*(*out)++ = '\n';
583				*(*out)++ = ' ';
584				len = 1;
585			}
586
587			*(*out)++ = val[i];
588			len++;
589		}
590		*(*out)++ = '\n';
591		return;
592	}
593
594	save = *out;
595	savelen = len;
596
597	*(*out)++ = ' ';
598	len++;
599
600	stop = (const unsigned char *) (val + vlen);
601
602	if ( type == LDIF_PUT_VALUE
603		&& isgraph( (unsigned char) val[0] ) && val[0] != ':' && val[0] != '<'
604		&& isgraph( (unsigned char) val[vlen-1] )
605#ifndef LDAP_BINARY_DEBUG
606		&& strstr( name, ";binary" ) == NULL
607#endif
608#ifndef LDAP_PASSWD_DEBUG
609		&& !ldif_must_b64_encode( name )
610#endif
611	) {
612		int b64 = 0;
613
614		for ( byte = (const unsigned char *) val; byte < stop;
615		    byte++, len++ )
616		{
617			if ( !isascii( *byte ) || !isprint( *byte ) ) {
618				b64 = 1;
619				break;
620			}
621			if ( len > LDIF_LINE_WIDTH+LDIF_KLUDGE ) {
622				*(*out)++ = '\n';
623				*(*out)++ = ' ';
624				len = 1;
625			}
626			*(*out)++ = *byte;
627		}
628
629		if( !b64 ) {
630			*(*out)++ = '\n';
631			return;
632		}
633	}
634
635	*out = save;
636	*(*out)++ = ':';
637	*(*out)++ = ' ';
638	len = savelen + 2;
639
640	/* convert to base 64 (3 bytes => 4 base 64 digits) */
641	for ( byte = (const unsigned char *) val;
642		byte < stop - 2;
643	    byte += 3 )
644	{
645		bits = (byte[0] & 0xff) << 16;
646		bits |= (byte[1] & 0xff) << 8;
647		bits |= (byte[2] & 0xff);
648
649		for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
650			if ( len > LDIF_LINE_WIDTH+LDIF_KLUDGE ) {
651				*(*out)++ = '\n';
652				*(*out)++ = ' ';
653				len = 1;
654			}
655
656			/* get b64 digit from high order 6 bits */
657			*(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
658		}
659	}
660
661	/* add padding if necessary */
662	if ( byte < stop ) {
663		for ( i = 0; byte + i < stop; i++ ) {
664			buf[i] = byte[i];
665		}
666		for ( pad = 0; i < 3; i++, pad++ ) {
667			buf[i] = '\0';
668		}
669		byte = buf;
670		bits = (byte[0] & 0xff) << 16;
671		bits |= (byte[1] & 0xff) << 8;
672		bits |= (byte[2] & 0xff);
673
674		for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
675			if ( len > LDIF_LINE_WIDTH+LDIF_KLUDGE ) {
676				*(*out)++ = '\n';
677				*(*out)++ = ' ';
678				len = 1;
679			}
680
681			if( i + pad < 4 ) {
682				/* get b64 digit from low order 6 bits */
683				*(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
684			} else {
685				*(*out)++ = '=';
686			}
687		}
688	}
689	*(*out)++ = '\n';
690}
691
692
693/*
694 * ldif_type_and_value return BER malloc'd, zero-terminated LDIF line
695 */
696char *
697ldif_put(
698	int type,
699	LDAP_CONST char *name,
700	LDAP_CONST char *val,
701	ber_len_t vlen )
702{
703    char	*buf, *p;
704    ber_len_t nlen;
705
706    nlen = ( name != NULL ) ? strlen( name ) : 0;
707
708	buf = (char *) ber_memalloc( LDIF_SIZE_NEEDED( nlen, vlen ) + 1 );
709
710    if ( buf == NULL ) {
711		ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
712			_("ldif_type_and_value: malloc failed!"));
713		return NULL;
714    }
715
716    p = buf;
717    ldif_sput( &p, type, name, val, vlen );
718    *p = '\0';
719
720    return( buf );
721}
722
723int ldif_is_not_printable(
724	LDAP_CONST char *val,
725	ber_len_t vlen )
726{
727	if( vlen == 0 || val == NULL  ) {
728		return -1;
729	}
730
731	if( isgraph( (unsigned char) val[0] ) && val[0] != ':' && val[0] != '<' &&
732		isgraph( (unsigned char) val[vlen-1] ) )
733	{
734		ber_len_t i;
735
736		for ( i = 0; val[i]; i++ ) {
737			if ( !isascii( val[i] ) || !isprint( (unsigned char) val[i] ) ) {
738				return 1;
739			}
740		}
741
742		return 0;
743	}
744
745	return 1;
746}
747
748LDIFFP *
749ldif_open(
750	LDAP_CONST char *file,
751	LDAP_CONST char *mode
752)
753{
754	FILE *fp = fopen( file, mode );
755	LDIFFP *lfp = NULL;
756
757	if ( fp ) {
758		lfp = ber_memalloc( sizeof( LDIFFP ));
759		lfp->fp = fp;
760		lfp->prev = NULL;
761	}
762	return lfp;
763}
764
765void
766ldif_close(
767	LDIFFP *lfp
768)
769{
770	LDIFFP *prev;
771
772	while ( lfp ) {
773		fclose( lfp->fp );
774		prev = lfp->prev;
775		ber_memfree( lfp );
776		lfp = prev;
777	}
778}
779
780#define	LDIF_MAXLINE	4096
781
782/*
783 * ldif_read_record - read an ldif record.  Return 1 for success, 0 for EOF,
784 * -1 for error.
785 */
786int
787ldif_read_record(
788	LDIFFP      *lfp,
789	int         *lno,		/* ptr to line number counter              */
790	char        **bufp,     /* ptr to malloced output buffer           */
791	int         *buflenp )  /* ptr to length of *bufp                  */
792{
793	char        linebuf[LDIF_MAXLINE], *line, *nbufp;
794	ber_len_t   lcur = 0, len, linesize;
795	int         last_ch = '\n', found_entry = 0, stop, top_comment = 0;
796
797	line     = linebuf;
798	linesize = sizeof( linebuf );
799
800	for ( stop = 0;  !stop;  last_ch = line[len-1] ) {
801		/* If we're at the end of this file, see if we should pop
802		 * back to a previous file. (return from an include)
803		 */
804		while ( feof( lfp->fp )) {
805			if ( lfp->prev ) {
806				LDIFFP *tmp = lfp->prev;
807				fclose( lfp->fp );
808				*lfp = *tmp;
809				ber_memfree( tmp );
810			} else {
811				stop = 1;
812				break;
813			}
814		}
815		if ( stop )
816			break;
817
818		if ( fgets( line, linesize, lfp->fp ) == NULL ) {
819			stop = 1;
820			/* Add \n in case the file does not end with newline */
821			line = "\n";
822		}
823		len = strlen( line );
824
825		if ( last_ch == '\n' ) {
826			(*lno)++;
827
828			if ( line[0] == '\n' ||
829				( line[0] == '\r' && line[1] == '\n' )) {
830				if ( !found_entry ) {
831					lcur = 0;
832					top_comment = 0;
833					continue;
834				}
835				break;
836			}
837
838			if ( !found_entry ) {
839				if ( line[0] == '#' ) {
840					top_comment = 1;
841				} else if ( ! ( top_comment && line[0] == ' ' ) ) {
842					/* Found a new entry */
843					found_entry = 1;
844
845					if ( isdigit( (unsigned char) line[0] ) ) {
846						/* skip index */
847						continue;
848					}
849					if ( !strncasecmp( line, "include:",
850						STRLENOF("include:"))) {
851						FILE *fp2;
852						char *ptr;
853						found_entry = 0;
854
855						if ( line[len-1] == '\n' ) {
856							len--;
857							line[len] = '\0';
858						}
859						if ( line[len-1] == '\r' ) {
860							len--;
861							line[len] = '\0';
862						}
863
864						ptr = line + STRLENOF("include:");
865						while (isspace((unsigned char) *ptr)) ptr++;
866						fp2 = ldif_open_url( ptr );
867						if ( fp2 ) {
868							LDIFFP *lnew = ber_memalloc( sizeof( LDIFFP ));
869							if ( lnew == NULL ) {
870								fclose( fp2 );
871								return 0;
872							}
873							lnew->prev = lfp->prev;
874							lnew->fp = lfp->fp;
875							lfp->prev = lnew;
876							lfp->fp = fp2;
877							line[len] = '\n';
878							len++;
879							continue;
880						} else {
881							/* We failed to open the file, this should
882							 * be reported as an error somehow.
883							 */
884							ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
885								_("ldif_read_record: include %s failed\n"), ptr );
886							return -1;
887						}
888					}
889				}
890			}
891		}
892
893		if ( *buflenp - lcur <= len ) {
894			*buflenp += len + LDIF_MAXLINE;
895			nbufp = ber_memrealloc( *bufp, *buflenp );
896			if( nbufp == NULL ) {
897				return 0;
898			}
899			*bufp = nbufp;
900		}
901		strcpy( *bufp + lcur, line );
902		lcur += len;
903	}
904
905	return( found_entry );
906}
907