1 /* encode.c - ber output encoding routines */
3 * Copyright (c) 1990 Regents of the University of Michigan.
6 * Redistribution and use in source and binary forms are permitted
7 * provided that this notice is preserved and that due credit is given
8 * to the University of Michigan at Ann Arbor. The name of the University
9 * may not be used to endorse or promote products derived from this
10 * software without specific prior written permission. This software
11 * is provided ``as is'' without express or implied warranty.
18 #include <ac/string.h>
26 #include <sys/types.h>
27 #include <ac/socket.h>
31 static int ber_put_len LDAP_P(( BerElement *ber,
32 unsigned long len, int nosos ));
34 static int ber_start_seqorset LDAP_P(( BerElement *ber,
37 static int ber_put_seqorset LDAP_P(( BerElement *ber ));
39 static int ber_put_int_or_enum LDAP_P(( BerElement *ber,
40 long num, unsigned long tag ));
44 ber_calc_taglen( unsigned long tag )
49 /* find the first non-all-zero byte in the tag */
50 for ( i = sizeof(long) - 1; i > 0; i-- ) {
51 mask = (0xffL << (i * 8));
61 ber_put_tag( BerElement *ber, unsigned long tag, int nosos )
66 taglen = ber_calc_taglen( tag );
68 ntag = AC_HTONL( tag );
70 return( ber_write( ber, ((char *) &ntag) + sizeof(long) - taglen,
75 ber_calc_lenlen( unsigned long len )
78 * short len if it's less than 128 - one byte giving the len,
86 * long len otherwise - one byte with bit 8 set, giving the
87 * length of the length, followed by the length itself.
94 if ( len <= 0xFFFFFFL )
101 ber_put_len( BerElement *ber, unsigned long len, int nosos )
106 unsigned long netlen;
109 * short len if it's less than 128 - one byte giving the len,
114 netlen = AC_HTONL( len );
115 return( ber_write( ber, (char *) &netlen + sizeof(long) - 1,
120 * long len otherwise - one byte with bit 8 set, giving the
121 * length of the length, followed by the length itself.
124 /* find the first non-all-zero byte */
125 for ( i = sizeof(long) - 1; i > 0; i-- ) {
126 mask = (0xffL << (i * 8));
136 /* write the length of the length */
137 if ( ber_write( ber, &lenlen, 1, nosos ) != 1 )
140 /* write the length itself */
141 netlen = AC_HTONL( len );
142 if ( ber_write( ber, (char *) &netlen + (sizeof(long) - i), i, nosos )
150 ber_put_int_or_enum( BerElement *ber, long num, unsigned long tag )
159 * high bit is set - look for first non-all-one byte
160 * high bit is clear - look for first non-all-zero byte
162 for ( i = sizeof(long) - 1; i > 0; i-- ) {
163 mask = (0xffL << (i * 8));
167 if ( (num & mask) != mask )
177 * we now have the "leading byte". if the high bit on this
178 * byte matches the sign bit, we need to "back up" a byte.
180 mask = (num & (0x80L << (i * 8)));
181 if ( (mask && !sign) || (sign && !mask) )
186 if ( (taglen = ber_put_tag( ber, tag, 0 )) == -1 )
189 if ( (lenlen = ber_put_len( ber, len, 0 )) == -1 )
192 netnum = AC_HTONL( num );
193 if ( ber_write( ber, (char *) &netnum + (sizeof(long) - i), i, 0 )
197 /* length of tag + length + contents */
198 return( taglen + lenlen + i );
202 ber_put_enum( BerElement *ber, long num, unsigned long tag )
204 if ( tag == LBER_DEFAULT )
205 tag = LBER_ENUMERATED;
207 return( ber_put_int_or_enum( ber, num, tag ) );
211 ber_put_int( BerElement *ber, long num, unsigned long tag )
213 if ( tag == LBER_DEFAULT )
216 return( ber_put_int_or_enum( ber, num, tag ) );
220 ber_put_ostring( BerElement *ber, char *str, unsigned long len,
223 int taglen, lenlen, rc;
224 #ifdef STR_TRANSLATION
226 #endif /* STR_TRANSLATION */
228 if ( tag == LBER_DEFAULT )
229 tag = LBER_OCTETSTRING;
231 if ( (taglen = ber_put_tag( ber, tag, 0 )) == -1 )
234 #ifdef STR_TRANSLATION
235 if ( len > 0 && ( ber->ber_options & LBER_TRANSLATE_STRINGS ) != 0 &&
236 ber->ber_encode_translate_proc != NULL ) {
237 if ( (*(ber->ber_encode_translate_proc))( &str, &len, 0 )
245 #endif /* STR_TRANSLATION */
247 if ( (lenlen = ber_put_len( ber, len, 0 )) == -1 ||
248 (unsigned long) ber_write( ber, str, len, 0 ) != len ) {
251 /* return length of tag + length + contents */
252 rc = taglen + lenlen + len;
255 #ifdef STR_TRANSLATION
259 #endif /* STR_TRANSLATION */
265 ber_put_string( BerElement *ber, char *str, unsigned long tag )
267 return( ber_put_ostring( ber, str, strlen( str ), tag ));
271 ber_put_bitstring( BerElement *ber, char *str,
272 unsigned long blen /* in bits */, unsigned long tag )
274 int taglen, lenlen, len;
275 unsigned char unusedbits;
277 if ( tag == LBER_DEFAULT )
278 tag = LBER_BITSTRING;
280 if ( (taglen = ber_put_tag( ber, tag, 0 )) == -1 )
283 len = ( blen + 7 ) / 8;
284 unusedbits = (unsigned char) ((len * 8) - blen);
285 if ( (lenlen = ber_put_len( ber, len + 1, 0 )) == -1 )
288 if ( ber_write( ber, (char *)&unusedbits, 1, 0 ) != 1 )
291 if ( ber_write( ber, str, len, 0 ) != len )
294 /* return length of tag + length + unused bit count + contents */
295 return( taglen + 1 + lenlen + len );
299 ber_put_null( BerElement *ber, unsigned long tag )
303 if ( tag == LBER_DEFAULT )
306 if ( (taglen = ber_put_tag( ber, tag, 0 )) == -1 )
309 if ( ber_put_len( ber, 0, 0 ) != 1 )
312 return( taglen + 1 );
316 ber_put_boolean( BerElement *ber, int boolval, unsigned long tag )
319 unsigned char trueval = 0xff;
320 unsigned char falseval = 0x00;
322 if ( tag == LBER_DEFAULT )
325 if ( (taglen = ber_put_tag( ber, tag, 0 )) == -1 )
328 if ( ber_put_len( ber, 1, 0 ) != 1 )
331 if ( ber_write( ber, (char *)(boolval ? &trueval : &falseval), 1, 0 )
335 return( taglen + 2 );
338 #define FOUR_BYTE_LEN 5
341 ber_start_seqorset( BerElement *ber, unsigned long tag )
345 if ( (new = (Seqorset *) calloc( sizeof(Seqorset), 1 ))
349 if ( ber->ber_sos == NULLSEQORSET )
350 new->sos_first = ber->ber_ptr;
352 new->sos_first = ber->ber_sos->sos_ptr;
354 /* Set aside room for a 4 byte length field */
355 new->sos_ptr = new->sos_first + ber_calc_taglen( tag ) + FOUR_BYTE_LEN;
358 new->sos_next = ber->ber_sos;
365 ber_start_seq( BerElement *ber, unsigned long tag )
367 if ( tag == LBER_DEFAULT )
370 return( ber_start_seqorset( ber, tag ) );
374 ber_start_set( BerElement *ber, unsigned long tag )
376 if ( tag == LBER_DEFAULT )
379 return( ber_start_seqorset( ber, tag ) );
383 ber_put_seqorset( BerElement *ber )
385 unsigned long len, netlen;
387 unsigned char ltag = 0x80 + FOUR_BYTE_LEN - 1;
389 Seqorset **sos = &ber->ber_sos;
392 * If this is the toplevel sequence or set, we need to actually
393 * write the stuff out. Otherwise, it's already been put in
394 * the appropriate buffer and will be written when the toplevel
395 * one is written. In this case all we need to do is update the
399 len = (*sos)->sos_clen;
400 netlen = AC_HTONL( len );
401 if ( sizeof(long) > 4 && len > 0xFFFFFFFFL )
404 if ( ber->ber_options & LBER_USE_DER ) {
405 lenlen = ber_calc_lenlen( len );
407 lenlen = FOUR_BYTE_LEN;
410 if ( (next = (*sos)->sos_next) == NULLSEQORSET ) {
412 if ( (taglen = ber_put_tag( ber, (*sos)->sos_tag, 1 )) == -1 )
415 if ( ber->ber_options & LBER_USE_DER ) {
416 /* Write the length in the minimum # of octets */
417 if ( ber_put_len( ber, len, 1 ) == -1 )
420 if (lenlen != FOUR_BYTE_LEN) {
422 * We set aside FOUR_BYTE_LEN bytes for
423 * the length field. Move the data if
424 * we don't actually need that much
426 SAFEMEMCPY( (*sos)->sos_first + taglen +
427 lenlen, (*sos)->sos_first + taglen +
428 FOUR_BYTE_LEN, len );
431 /* Fill FOUR_BYTE_LEN bytes for length field */
432 /* one byte of length length */
433 if ( ber_write( ber, (char *)<ag, 1, 1 ) != 1 )
436 /* the length itself */
437 if ( ber_write( ber, (char *) &netlen + sizeof(long)
438 - (FOUR_BYTE_LEN - 1), FOUR_BYTE_LEN - 1, 1 )
439 != FOUR_BYTE_LEN - 1 )
442 /* The ber_ptr is at the set/seq start - move it to the end */
443 (*sos)->sos_ber->ber_ptr += len;
448 taglen = ber_calc_taglen( (*sos)->sos_tag );
449 ntag = AC_HTONL( (*sos)->sos_tag );
450 SAFEMEMCPY( (*sos)->sos_first, (char *) &ntag +
451 sizeof(long) - taglen, taglen );
453 if ( ber->ber_options & LBER_USE_DER ) {
455 ? (unsigned char) len
456 : 0x80 + (lenlen - 1);
459 /* one byte of length length */
460 SAFEMEMCPY( (*sos)->sos_first + 1, <ag, 1 );
462 if ( ber->ber_options & LBER_USE_DER ) {
464 /* Write the length itself */
465 SAFEMEMCPY( (*sos)->sos_first + 2,
466 (char *)&netlen + sizeof(unsigned long) -
470 if (lenlen != FOUR_BYTE_LEN) {
472 * We set aside FOUR_BYTE_LEN bytes for
473 * the length field. Move the data if
474 * we don't actually need that much
476 SAFEMEMCPY( (*sos)->sos_first + taglen +
477 lenlen, (*sos)->sos_first + taglen +
478 FOUR_BYTE_LEN, len );
481 /* the length itself */
482 SAFEMEMCPY( (*sos)->sos_first + taglen + 1,
483 (char *) &netlen + sizeof(long) -
484 (FOUR_BYTE_LEN - 1), FOUR_BYTE_LEN - 1 );
487 next->sos_clen += (taglen + lenlen + len);
488 next->sos_ptr += (taglen + lenlen + len);
491 /* we're done with this seqorset, so free it up */
492 free( (char *) (*sos) );
495 return( taglen + lenlen + len );
499 ber_put_seq( BerElement *ber )
501 return( ber_put_seqorset( ber ) );
505 ber_put_set( BerElement *ber )
507 return( ber_put_seqorset( ber ) );
514 ( BerElement *ber, char *fmt, ... )
534 ber = va_arg( ap, BerElement * );
535 fmt = va_arg( ap, char * );
538 for ( rc = 0; *fmt && rc != -1; fmt++ ) {
540 case 'b': /* boolean */
541 i = va_arg( ap, int );
542 rc = ber_put_boolean( ber, i, ber->ber_tag );
546 i = va_arg( ap, int );
547 rc = ber_put_int( ber, i, ber->ber_tag );
550 case 'e': /* enumeration */
551 i = va_arg( ap, int );
552 rc = ber_put_enum( ber, i, ber->ber_tag );
556 rc = ber_put_null( ber, ber->ber_tag );
559 case 'o': /* octet string (non-null terminated) */
560 s = va_arg( ap, char * );
561 len = va_arg( ap, int );
562 rc = ber_put_ostring( ber, s, len, ber->ber_tag );
565 case 's': /* string */
566 s = va_arg( ap, char * );
567 rc = ber_put_string( ber, s, ber->ber_tag );
570 case 'B': /* bit string */
571 s = va_arg( ap, char * );
572 len = va_arg( ap, int ); /* in bits */
573 rc = ber_put_bitstring( ber, s, len, ber->ber_tag );
576 case 't': /* tag for the next element */
577 ber->ber_tag = va_arg( ap, unsigned long );
578 ber->ber_usertag = 1;
581 case 'v': /* vector of strings */
582 if ( (ss = va_arg( ap, char ** )) == NULL )
584 for ( i = 0; ss[i] != NULL; i++ ) {
585 if ( (rc = ber_put_string( ber, ss[i],
586 ber->ber_tag )) == -1 )
591 case 'V': /* sequences of strings + lengths */
592 if ( (bv = va_arg( ap, struct berval ** )) == NULL )
594 for ( i = 0; bv[i] != NULL; i++ ) {
595 if ( (rc = ber_put_ostring( ber, bv[i]->bv_val,
596 bv[i]->bv_len, ber->ber_tag )) == -1 )
601 case '{': /* begin sequence */
602 rc = ber_start_seq( ber, ber->ber_tag );
605 case '}': /* end sequence */
606 rc = ber_put_seqorset( ber );
609 case '[': /* begin set */
610 rc = ber_start_set( ber, ber->ber_tag );
613 case ']': /* end set */
614 rc = ber_put_seqorset( ber );
619 fprintf( stderr, "unknown fmt %c\n", *fmt );
620 #endif /* LDAP_LIBUI */
625 if ( ber->ber_usertag == 0 )
626 ber->ber_tag = LBER_DEFAULT;
628 ber->ber_usertag = 0;