1 /** \ingroup header
2 * \file lib/header.c
3 */
4
5 /* RPM - Copyright (C) 1995-2002 Red Hat Software */
6
7 /* Data written to file descriptors is in network byte order. */
8 /* Data read from file descriptors is expected to be in */
9 /* network byte order and is converted on the fly to host order. */
10
11 #include "system.h"
12 #include <netdb.h>
13 #include <errno.h>
14 #include <inttypes.h>
15 #include <rpm/rpmtypes.h>
16 #include <rpm/rpmstring.h>
17 #include "lib/header_internal.h"
18 #include "lib/misc.h" /* tag function proto */
19
20 #include "debug.h"
21
22 /** \ingroup header
23 */
24 const unsigned char rpm_header_magic[8] = {
25 0x8e, 0xad, 0xe8, 0x01, 0x00, 0x00, 0x00, 0x00
26 };
27
28 /** \ingroup header
29 * Alignment needed for header data types.
30 */
31 static const int typeAlign[16] = {
32 1, /*!< RPM_NULL_TYPE */
33 1, /*!< RPM_CHAR_TYPE */
34 1, /*!< RPM_INT8_TYPE */
35 2, /*!< RPM_INT16_TYPE */
36 4, /*!< RPM_INT32_TYPE */
37 8, /*!< RPM_INT64_TYPE */
38 1, /*!< RPM_STRING_TYPE */
39 1, /*!< RPM_BIN_TYPE */
40 1, /*!< RPM_STRING_ARRAY_TYPE */
41 1, /*!< RPM_I18NSTRING_TYPE */
42 0,
43 0,
44 0,
45 0,
46 0,
47 0
48 };
49
50 /** \ingroup header
51 * Size of header data types.
52 */
53 static const int typeSizes[16] = {
54 0, /*!< RPM_NULL_TYPE */
55 1, /*!< RPM_CHAR_TYPE */
56 1, /*!< RPM_INT8_TYPE */
57 2, /*!< RPM_INT16_TYPE */
58 4, /*!< RPM_INT32_TYPE */
59 8, /*!< RPM_INT64_TYPE */
60 -1, /*!< RPM_STRING_TYPE */
61 1, /*!< RPM_BIN_TYPE */
62 -1, /*!< RPM_STRING_ARRAY_TYPE */
63 -1, /*!< RPM_I18NSTRING_TYPE */
64 0,
65 0,
66 0,
67 0,
68 0,
69 0
70 };
71
72 enum headerFlags_e {
73 HEADERFLAG_ALLOCATED = (1 << 1), /*!< Is 1st header region allocated? */
74 HEADERFLAG_LEGACY = (1 << 2), /*!< Header came from legacy source? */
75 HEADERFLAG_DEBUG = (1 << 3), /*!< Debug this header? */
76 };
77
78 typedef rpmFlags headerFlags;
79
80 /** \ingroup header
81 * A single tag from a Header.
82 */
83 typedef struct indexEntry_s * indexEntry;
84 struct indexEntry_s {
85 struct entryInfo_s info; /*!< Description of tag data. */
86 rpm_data_t data; /*!< Location of tag data. */
87 int length; /*!< No. bytes of data. */
88 int rdlen; /*!< No. bytes of data in region. */
89 };
90
91 /** \ingroup header
92 * The Header data structure.
93 */
94 struct headerToken_s {
95 void * blob; /*!< Header region blob. */
96 indexEntry index; /*!< Array of tags. */
97 int indexUsed; /*!< Current size of tag array. */
98 int indexAlloced; /*!< Allocated size of tag array. */
99 unsigned int instance; /*!< Rpmdb instance (offset) */
100 headerFlags flags;
101 int sorted; /*!< Current sort method */
102 int nrefs; /*!< Reference count. */
103 };
104
105 /** \ingroup header
106 * Maximum no. of bytes permitted in a header.
107 */
108 static const size_t headerMaxbytes = (256*1024*1024);
109
110 #define INDEX_MALLOC_SIZE 8
111
112 #define ENTRY_IS_REGION(_e) \
113 (((_e)->info.tag >= RPMTAG_HEADERIMAGE) && ((_e)->info.tag < RPMTAG_HEADERREGIONS))
114 #define ENTRY_IN_REGION(_e) ((_e)->info.offset < 0)
115
116 #define REGION_TAG_TYPE RPM_BIN_TYPE
117 #define REGION_TAG_COUNT sizeof(struct entryInfo_s)
118
119 /**
120 * Sanity check on no. of tags.
121 * This check imposes a limit of 65K tags, more than enough.
122 */
123 #define HEADER_TAGS_MAX 0x0000ffff
124 #define hdrchkTags(_ntags) ((_ntags) & (~HEADER_TAGS_MAX))
125
126 /**
127 * Sanity check on tag values.
128 * Catches out nasties like negative values and multiple regions.
129 **/
130 #define hdrchkTag(_tag) ((_tag) < HEADER_I18NTABLE)
131
132 /**
133 * Reasonableness check on count values.
134 * Most types have further restrictions, these are just the outer perimeter.
135 */
136 #define hdrchkCount(_dl, _count) ((_count) < 1 || (_count) > (_dl))
137
138 /**
139 * Sanity check on type values.
140 */
141 #define hdrchkType(_type) ((_type) < RPM_MIN_TYPE || (_type) > RPM_MAX_TYPE)
142
143 /**
144 * Sanity check on data size and/or offset and/or count.
145 * This check imposes a limit of 256 MB -- file signatures
146 * may require a lot of space in the header.
147 */
148 #define HEADER_DATA_MAX 0x0fffffff
149 #define hdrchkData(_nbytes) ((_nbytes) & (~HEADER_DATA_MAX))
150
151 /**
152 * Sanity check on data alignment for data type.
153 */
154 #define hdrchkAlign(_type, _off) ((_off) & (typeAlign[_type]-1))
155
156 /**
157 * Sanity check on range of data offset.
158 */
159 #define hdrchkRange(_dl, _off) ((_off) < 0 || (_off) > (_dl))
160
161 static int dataLength(rpm_tagtype_t type, rpm_constdata_t p, rpm_count_t count,
162 int onDisk, rpm_constdata_t pend);
163
164 /* Check tag type matches our definition */
hdrchkTagType(rpm_tag_t tag,rpm_tagtype_t type)165 static int hdrchkTagType(rpm_tag_t tag, rpm_tagtype_t type)
166 {
167 rpmTagType t = rpmTagGetTagType(tag);
168 if (t == type)
169 return 0;
170
171 /* Permit unknown tags for forward compatibility */
172 if (t == RPM_NULL_TYPE)
173 return 0;
174
175 /* Some string tags harmlessly disagree on the exact type */
176 if (rpmTagGetClass(tag) == RPM_STRING_CLASS &&
177 (rpmTagTypeGetClass(type) == RPM_STRING_CLASS))
178 return 0;
179
180 /* Known tag with mismatching type, bad bad bad. */
181 return 1;
182 }
183
184 #ifndef htonll
185 /* Convert a 64bit value to network byte order. */
186 RPM_GNUC_CONST
htonll(uint64_t n)187 static uint64_t htonll(uint64_t n)
188 {
189 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
190 uint32_t *i = (uint32_t*)&n;
191 uint32_t b = i[0];
192 i[0] = htonl(i[1]);
193 i[1] = htonl(b);
194 #endif
195 return n;
196 }
197 #endif
198
headerLink(Header h)199 Header headerLink(Header h)
200 {
201 if (h != NULL)
202 h->nrefs++;
203 return h;
204 }
205
headerUnlink(Header h)206 static Header headerUnlink(Header h)
207 {
208 if (h != NULL)
209 h->nrefs--;
210 return NULL;
211 }
212
headerFree(Header h)213 Header headerFree(Header h)
214 {
215 (void) headerUnlink(h);
216
217 if (h == NULL || h->nrefs > 0)
218 return NULL;
219
220 if (h->index) {
221 indexEntry entry = h->index;
222 int i;
223 for (i = 0; i < h->indexUsed; i++, entry++) {
224 if ((h->flags & HEADERFLAG_ALLOCATED) && ENTRY_IS_REGION(entry)) {
225 if (entry->length > 0) {
226 int32_t * ei = entry->data;
227 if ((ei - 2) == h->blob) h->blob = _free(h->blob);
228 entry->data = NULL;
229 }
230 } else if (!ENTRY_IN_REGION(entry)) {
231 entry->data = _free(entry->data);
232 }
233 entry->data = NULL;
234 }
235 h->index = _free(h->index);
236 }
237
238 h = _free(h);
239 return NULL;
240 }
241
headerCreate(void * blob,int32_t indexLen)242 static Header headerCreate(void *blob, int32_t indexLen)
243 {
244 Header h = xcalloc(1, sizeof(*h));
245 if (blob) {
246 h->blob = blob;
247 h->indexAlloced = indexLen + 1;
248 h->indexUsed = indexLen;
249 } else {
250 h->indexAlloced = INDEX_MALLOC_SIZE;
251 h->indexUsed = 0;
252 }
253 h->instance = 0;
254 h->sorted = 0;
255 h->index = xcalloc(h->indexAlloced, sizeof(*h->index));
256
257 h->nrefs = 0;
258 return headerLink(h);
259 }
260
headerNew(void)261 Header headerNew(void)
262 {
263 return headerCreate(NULL, 0);
264 }
265
hdrblobVerifyInfo(hdrblob blob,char ** emsg)266 static rpmRC hdrblobVerifyInfo(hdrblob blob, char **emsg)
267 {
268 struct entryInfo_s info;
269 int i, len = 0;
270 int32_t end = 0;
271 const char *ds = (const char *) blob->dataStart;
272 int32_t il = (blob->regionTag) ? blob->il-1 : blob->il;
273 entryInfo pe = (blob->regionTag) ? blob->pe+1 : blob->pe;
274 /* Can't typecheck signature header tags, sigh */
275 int typechk = (blob->regionTag == RPMTAG_HEADERIMMUTABLE ||
276 blob->regionTag == RPMTAG_HEADERIMAGE);
277
278 for (i = 0; i < il; i++) {
279 ei2h(&pe[i], &info);
280
281 /* Previous data must not overlap */
282 if (end > info.offset)
283 goto err;
284
285 if (hdrchkTag(info.tag))
286 goto err;
287 if (hdrchkType(info.type))
288 goto err;
289 if (hdrchkCount(blob->dl, info.count))
290 goto err;
291 if (hdrchkAlign(info.type, info.offset))
292 goto err;
293 if (hdrchkRange(blob->dl, info.offset))
294 goto err;
295 if (typechk && hdrchkTagType(info.tag, info.type))
296 goto err;
297
298 /* Verify the data actually fits */
299 len = dataLength(info.type, ds + info.offset,
300 info.count, 1, ds + blob->dl);
301 end = info.offset + len;
302 if (hdrchkRange(blob->dl, end) || len <= 0)
303 goto err;
304 if (blob->regionTag) {
305 /*
306 * Verify that the data does not overlap the region trailer. The
307 * region trailer is skipped by this loop, so the other checks
308 * don’t catch this case.
309 */
310 if (end > blob->rdl - REGION_TAG_COUNT && info.offset < blob->rdl)
311 goto err;
312 }
313 }
314 return 0; /* Everything ok */
315
316 err:
317 if (emsg) {
318 rasprintf(emsg,
319 _("tag[%d]: BAD, tag %d type %d offset %d count %d len %d"),
320 i, info.tag, info.type, info.offset, info.count, len);
321 }
322 return i + 1;
323 }
324
indexCmp(const void * avp,const void * bvp)325 static int indexCmp(const void * avp, const void * bvp)
326 {
327 indexEntry ap = (indexEntry) avp, bp = (indexEntry) bvp;
328 return (ap->info.tag - bp->info.tag);
329 }
330
headerSort(Header h)331 static void headerSort(Header h)
332 {
333 if (!h->sorted) {
334 qsort(h->index, h->indexUsed, sizeof(*h->index), indexCmp);
335 h->sorted = 1;
336 }
337 }
338
offsetCmp(const void * avp,const void * bvp)339 static int offsetCmp(const void * avp, const void * bvp)
340 {
341 indexEntry ap = (indexEntry) avp, bp = (indexEntry) bvp;
342 int rc = (ap->info.offset - bp->info.offset);
343
344 if (rc == 0) {
345 /* Within a region, entries sort by address. Added drips sort by tag. */
346 if (ap->info.offset < 0)
347 rc = (((char *)ap->data) - ((char *)bp->data));
348 else
349 rc = (ap->info.tag - bp->info.tag);
350 }
351 return rc;
352 }
353
alignDiff(rpm_tagtype_t type,unsigned int alignsize)354 static inline unsigned int alignDiff(rpm_tagtype_t type, unsigned int alignsize)
355 {
356 int typesize = typeSizes[type];
357
358 if (typesize > 1) {
359 unsigned int diff = typesize - (alignsize % typesize);
360 if (diff != typesize)
361 return diff;
362 }
363 return 0;
364 }
365
headerSizeof(Header h,int magicp)366 unsigned headerSizeof(Header h, int magicp)
367 {
368 indexEntry entry;
369 unsigned int size = 0;
370 int i;
371
372 if (h == NULL)
373 return size;
374
375 headerSort(h);
376
377 if (magicp == HEADER_MAGIC_YES)
378 size += sizeof(rpm_header_magic);
379
380 size += 2 * sizeof(int32_t); /* count of index entries */
381
382 for (i = 0, entry = h->index; i < h->indexUsed; i++, entry++) {
383 /* Regions go in as is ... */
384 if (ENTRY_IS_REGION(entry)) {
385 size += entry->length;
386 /* Reserve space for legacy region tag + data */
387 if (i == 0 && (h->flags & HEADERFLAG_LEGACY))
388 size += sizeof(struct entryInfo_s) + entry->info.count;
389 continue;
390 }
391
392 /* ... and region elements are skipped. */
393 if (entry->info.offset < 0)
394 continue;
395
396 /* Alignment */
397 size += alignDiff(entry->info.type, size);
398
399 size += sizeof(struct entryInfo_s) + entry->length;
400 }
401
402 return size;
403 }
404
405 /*
406 * Header string (array) size calculation, bounded if end is non-NULL.
407 * Return length (including \0 termination) on success, -1 on error.
408 */
strtaglen(const char * str,rpm_count_t c,const char * end)409 static inline int strtaglen(const char *str, rpm_count_t c, const char *end)
410 {
411 const char *start = str;
412 const char *s = NULL;
413 int len = -1; /* assume failure */
414
415 if (end) {
416 while (end > start && (s = memchr(start, '\0', end-start))) {
417 if (--c == 0)
418 break;
419 start = s + 1;
420 }
421 } else {
422 while ((s = strchr(start, '\0'))) {
423 if (--c == 0)
424 break;
425 start = s + 1;
426 }
427 }
428
429 if (s != NULL && c == 0)
430 len = s - str + 1;
431
432 return len;
433 }
434
435 /**
436 * Return length of entry data.
437 * @param type entry data type
438 * @param p entry data
439 * @param count entry item count
440 * @param onDisk data is concatenated strings (with NUL's))?
441 * @param pend pointer to end of data (or NULL)
442 * @return no. bytes in data, -1 on failure
443 */
dataLength(rpm_tagtype_t type,rpm_constdata_t p,rpm_count_t count,int onDisk,rpm_constdata_t pend)444 static int dataLength(rpm_tagtype_t type, rpm_constdata_t p, rpm_count_t count,
445 int onDisk, rpm_constdata_t pend)
446 {
447 const char * s = p;
448 const char * se = pend;
449 int length = 0;
450
451 switch (type) {
452 case RPM_STRING_TYPE:
453 if (count != 1)
454 return -1;
455 length = strtaglen(s, 1, se);
456 break;
457
458 case RPM_STRING_ARRAY_TYPE:
459 case RPM_I18NSTRING_TYPE:
460 /* These are like RPM_STRING_TYPE, except they're *always* an array */
461 /* Compute sum of length of all strings, including nul terminators */
462
463 if (onDisk) {
464 length = strtaglen(s, count, se);
465 } else {
466 const char ** av = (const char **)p;
467 while (count--) {
468 /* add one for null termination */
469 length += strlen(*av++) + 1;
470 }
471 }
472 break;
473
474 default:
475 if (typeSizes[type] == -1)
476 return -1;
477 length = typeSizes[(type & 0xf)] * count;
478 if (length < 0 || (se && (s + length) > se))
479 return -1;
480 break;
481 }
482
483 return length;
484 }
485
486 /** \ingroup header
487 * Swap int32_t and int16_t arrays within header region.
488 *
489 * If a header region tag is in the set to be swabbed, as the data for a
490 * a header region is located after all other tag data.
491 *
492 * @param entry header entry
493 * @param il no. of entries
494 * @param dl start no. bytes of data
495 * @param pe header physical entry pointer (swapped)
496 * @param dataStart header data start
497 * @param dataEnd header data end
498 * @param regionid region offset
499 * @param fast use offsets for data sizes if possible
500 * @return no. bytes of data in region, -1 on error
501 */
regionSwab(indexEntry entry,int il,int dl,entryInfo pe,unsigned char * dataStart,const unsigned char * dataEnd,int regionid,int fast)502 static int regionSwab(indexEntry entry, int il, int dl,
503 entryInfo pe,
504 unsigned char * dataStart,
505 const unsigned char * dataEnd,
506 int regionid, int fast)
507 {
508 if ((entry != NULL && regionid >= 0) || (entry == NULL && regionid != 0))
509 return -1;
510
511 for (; il > 0; il--, pe++) {
512 struct indexEntry_s ie;
513
514 ei2h(pe, &ie.info);
515
516 if (hdrchkType(ie.info.type))
517 return -1;
518 if (hdrchkData(ie.info.count))
519 return -1;
520 if (hdrchkData(ie.info.offset))
521 return -1;
522 if (hdrchkAlign(ie.info.type, ie.info.offset))
523 return -1;
524
525 ie.data = dataStart + ie.info.offset;
526 if (dataEnd && (unsigned char *)ie.data >= dataEnd)
527 return -1;
528
529 /* The offset optimization is only relevant for string types */
530 if (fast && il > 1 && typeSizes[ie.info.type] == -1) {
531 ie.length = ntohl(pe[1].offset) - ie.info.offset;
532 } else {
533 ie.length = dataLength(ie.info.type, ie.data, ie.info.count,
534 1, dataEnd);
535 }
536 if (ie.length < 0 || hdrchkData(ie.length))
537 return -1;
538
539 ie.rdlen = 0;
540
541 if (entry) {
542 ie.info.offset = regionid;
543 *entry = ie; /* structure assignment */
544 entry++;
545 }
546
547 /* Alignment */
548 dl += alignDiff(ie.info.type, dl);
549
550 /* Perform endian conversions */
551 switch (ntohl(pe->type)) {
552 case RPM_INT64_TYPE:
553 { uint64_t * it = ie.data;
554 for (; ie.info.count > 0; ie.info.count--, it += 1) {
555 if (dataEnd && ((unsigned char *)it) >= dataEnd)
556 return -1;
557 *it = htonll(*it);
558 }
559 } break;
560 case RPM_INT32_TYPE:
561 { int32_t * it = ie.data;
562 for (; ie.info.count > 0; ie.info.count--, it += 1) {
563 if (dataEnd && ((unsigned char *)it) >= dataEnd)
564 return -1;
565 *it = htonl(*it);
566 }
567 } break;
568 case RPM_INT16_TYPE:
569 { int16_t * it = ie.data;
570 for (; ie.info.count > 0; ie.info.count--, it += 1) {
571 if (dataEnd && ((unsigned char *)it) >= dataEnd)
572 return -1;
573 *it = htons(*it);
574 }
575 } break;
576 }
577
578 dl += ie.length;
579 }
580
581 return dl;
582 }
583
doExport(const struct indexEntry_s * hindex,int indexUsed,headerFlags flags,unsigned int * bsize)584 static void * doExport(const struct indexEntry_s *hindex, int indexUsed,
585 headerFlags flags, unsigned int *bsize)
586 {
587 int32_t * ei = NULL;
588 entryInfo pe;
589 char * dataStart;
590 char * te;
591 unsigned len, diff;
592 int32_t il = 0;
593 int32_t dl = 0;
594 indexEntry entry;
595 int i;
596 int drlen, ndribbles;
597 size_t ilen = indexUsed * sizeof(struct indexEntry_s);
598 indexEntry index = memcpy(xmalloc(ilen), hindex, ilen);
599
600 /* Sort entries by (offset,tag). */
601 qsort(index, indexUsed, sizeof(*index), offsetCmp);
602
603 /* Compute (il,dl) for all tags, including those deleted in region. */
604 drlen = ndribbles = 0;
605 for (i = 0, entry = index; i < indexUsed; i++, entry++) {
606 if (ENTRY_IS_REGION(entry)) {
607 int32_t rdl = -entry->info.offset; /* negative offset */
608 int32_t ril = rdl/sizeof(*pe);
609 int rid = entry->info.offset;
610
611 il += ril;
612 dl += entry->rdlen + entry->info.count;
613 /* Reserve space for legacy region tag */
614 if (i == 0 && (flags & HEADERFLAG_LEGACY))
615 il += 1;
616
617 /* Skip rest of entries in region, but account for dribbles. */
618 for (; i < indexUsed && entry->info.offset <= rid+1; i++, entry++) {
619 if (entry->info.offset <= rid)
620 continue;
621
622 /* Alignment */
623 diff = alignDiff(entry->info.type, dl);
624 if (diff) {
625 drlen += diff;
626 dl += diff;
627 }
628
629 ndribbles++;
630 il++;
631 drlen += entry->length;
632 dl += entry->length;
633 }
634 i--;
635 entry--;
636 continue;
637 }
638
639 /* Ignore deleted drips. */
640 if (entry->data == NULL || entry->length <= 0)
641 continue;
642
643 /* Alignment */
644 dl += alignDiff(entry->info.type, dl);
645
646 il++;
647 dl += entry->length;
648 }
649
650 /* Sanity checks on header intro. */
651 if (hdrchkTags(il) || hdrchkData(dl))
652 goto errxit;
653
654 len = sizeof(il) + sizeof(dl) + (il * sizeof(*pe)) + dl;
655
656 ei = xmalloc(len);
657 ei[0] = htonl(il);
658 ei[1] = htonl(dl);
659
660 pe = (entryInfo) &ei[2];
661 dataStart = te = (char *) (pe + il);
662
663 for (i = 0, entry = index; i < indexUsed; i++, entry++) {
664 const char * src;
665 unsigned char *t;
666 int count;
667 int rdlen;
668 unsigned int diff;
669
670 if (entry->data == NULL || entry->length <= 0)
671 continue;
672
673 t = (unsigned char*)te;
674 pe->tag = htonl(entry->info.tag);
675 pe->type = htonl(entry->info.type);
676 pe->count = htonl(entry->info.count);
677
678 if (ENTRY_IS_REGION(entry)) {
679 int32_t rdl = -entry->info.offset; /* negative offset */
680 int32_t ril = rdl/sizeof(*pe) + ndribbles;
681 int rid = entry->info.offset;
682
683 src = (char *)entry->data;
684 rdlen = entry->rdlen;
685
686 /* Legacy headers don't have regions originally, create one */
687 if (i == 0 && (flags & HEADERFLAG_LEGACY)) {
688 int32_t stei[4];
689
690 memcpy(pe+1, src, rdl);
691 memcpy(te, src + rdl, rdlen);
692 te += rdlen;
693
694 pe->offset = htonl(te - dataStart);
695 stei[0] = pe->tag;
696 stei[1] = pe->type;
697 stei[2] = htonl(-rdl-entry->info.count);
698 stei[3] = pe->count;
699 memcpy(te, stei, entry->info.count);
700 te += entry->info.count;
701 ril++;
702 rdlen += entry->info.count;
703
704 count = regionSwab(NULL, ril, 0, pe, t, NULL, 0, 0);
705 if (count != rdlen)
706 goto errxit;
707
708 } else {
709
710 memcpy(pe+1, src + sizeof(*pe), ((ril-1) * sizeof(*pe)));
711 memcpy(te, src + (ril * sizeof(*pe)), rdlen+entry->info.count+drlen);
712 te += rdlen;
713 {
714 entryInfo se = (entryInfo)src;
715 int off = ntohl(se->offset);
716 pe->offset = (off) ? htonl(te - dataStart) : htonl(off);
717 }
718 te += entry->info.count + drlen;
719
720 count = regionSwab(NULL, ril, 0, pe, t, NULL, 0, 0);
721 if (count != (rdlen + entry->info.count + drlen))
722 goto errxit;
723 }
724
725 /* Skip rest of entries in region. */
726 while (i < indexUsed && entry->info.offset <= rid+1) {
727 i++;
728 entry++;
729 }
730 i--;
731 entry--;
732 pe += ril;
733 continue;
734 }
735
736 /* Ignore deleted drips. */
737 if (entry->data == NULL || entry->length <= 0)
738 continue;
739
740 /* Alignment */
741 diff = alignDiff(entry->info.type, (te - dataStart));
742 if (diff) {
743 memset(te, 0, diff);
744 te += diff;
745 }
746
747 pe->offset = htonl(te - dataStart);
748
749 /* copy data w/ endian conversions */
750 switch (entry->info.type) {
751 case RPM_INT64_TYPE:
752 count = entry->info.count;
753 src = entry->data;
754 while (count--) {
755 *((uint64_t *)te) = htonll(*((uint64_t *)src));
756 te += sizeof(uint64_t);
757 src += sizeof(uint64_t);
758 }
759 break;
760
761 case RPM_INT32_TYPE:
762 count = entry->info.count;
763 src = entry->data;
764 while (count--) {
765 *((int32_t *)te) = htonl(*((int32_t *)src));
766 te += sizeof(int32_t);
767 src += sizeof(int32_t);
768 }
769 break;
770
771 case RPM_INT16_TYPE:
772 count = entry->info.count;
773 src = entry->data;
774 while (count--) {
775 *((int16_t *)te) = htons(*((int16_t *)src));
776 te += sizeof(int16_t);
777 src += sizeof(int16_t);
778 }
779 break;
780
781 default:
782 memcpy(te, entry->data, entry->length);
783 te += entry->length;
784 break;
785 }
786 pe++;
787 }
788
789 /* Insure that there are no memcpy underruns/overruns. */
790 if (((char *)pe) != dataStart)
791 goto errxit;
792 if ((((char *)ei)+len) != te)
793 goto errxit;
794
795 if (bsize)
796 *bsize = len;
797
798 free(index);
799 return (void *) ei;
800
801 errxit:
802 free(ei);
803 free(index);
804 return NULL;
805 }
806
headerExport(Header h,unsigned int * bsize)807 void * headerExport(Header h, unsigned int *bsize)
808 {
809 void *blob = NULL;
810
811 if (h) {
812 blob = doExport(h->index, h->indexUsed, h->flags, bsize);
813 }
814
815 return blob;
816 }
817
headerUnload(Header h)818 void * headerUnload(Header h)
819 {
820 return headerExport(h, NULL);
821 }
822
823 /**
824 * Find matching (tag,type) entry in header.
825 * @param h header
826 * @param tag entry tag
827 * @param type entry type
828 * @return header entry
829 */
830 static
findEntry(Header h,rpmTagVal tag,rpm_tagtype_t type)831 indexEntry findEntry(Header h, rpmTagVal tag, rpm_tagtype_t type)
832 {
833 indexEntry entry;
834 struct indexEntry_s key;
835
836 if (h == NULL) return NULL;
837 headerSort(h);
838
839 key.info.tag = tag;
840
841 entry = bsearch(&key, h->index, h->indexUsed, sizeof(*h->index), indexCmp);
842 if (entry == NULL)
843 return NULL;
844
845 if (type == RPM_NULL_TYPE)
846 return entry;
847
848 /* look backwards */
849 while (entry->info.tag == tag && entry->info.type != type &&
850 entry > h->index) entry--;
851
852 if (entry->info.tag == tag && entry->info.type == type)
853 return entry;
854
855 return NULL;
856 }
857
headerDel(Header h,rpmTagVal tag)858 int headerDel(Header h, rpmTagVal tag)
859 {
860 indexEntry last = h->index + h->indexUsed;
861 indexEntry entry, first;
862 int ne;
863
864 entry = findEntry(h, tag, RPM_NULL_TYPE);
865 if (!entry) return 1;
866
867 /* Make sure entry points to the first occurrence of this tag. */
868 while (entry > h->index && (entry - 1)->info.tag == tag)
869 entry--;
870
871 /* Free data for tags being removed. */
872 for (first = entry; first < last; first++) {
873 rpm_data_t data;
874 if (first->info.tag != tag)
875 break;
876 data = first->data;
877 first->data = NULL;
878 first->length = 0;
879 if (ENTRY_IN_REGION(first))
880 continue;
881 free(data);
882 }
883
884 ne = (first - entry);
885 if (ne > 0) {
886 h->indexUsed -= ne;
887 ne = last - first;
888 if (ne > 0)
889 memmove(entry, first, (ne * sizeof(*entry)));
890 }
891
892 return 0;
893 }
894
hdrblobImport(hdrblob blob,int fast,Header * hdrp,char ** emsg)895 rpmRC hdrblobImport(hdrblob blob, int fast, Header *hdrp, char **emsg)
896 {
897 Header h = NULL;
898 indexEntry entry;
899 int rdlen;
900
901 h = headerCreate(blob->ei, blob->il);
902
903 entry = h->index;
904 if (!(htonl(blob->pe->tag) < RPMTAG_HEADERI18NTABLE)) {
905 /* An original v3 header, create a legacy region entry for it */
906 h->flags |= HEADERFLAG_LEGACY;
907 entry->info.type = REGION_TAG_TYPE;
908 entry->info.tag = RPMTAG_HEADERIMAGE;
909 entry->info.count = REGION_TAG_COUNT;
910 entry->info.offset = ((unsigned char *)blob->pe - blob->dataStart); /* negative offset */
911
912 entry->data = blob->pe;
913 entry->length = blob->pvlen - sizeof(blob->il) - sizeof(blob->dl);
914 rdlen = regionSwab(entry+1, blob->il, 0, blob->pe,
915 blob->dataStart, blob->dataEnd,
916 entry->info.offset, fast);
917 if (rdlen != blob->dl)
918 goto errxit;
919 entry->rdlen = rdlen;
920 h->indexUsed++;
921 } else {
922 /* Either a v4 header or an "upgraded" v3 header with a legacy region */
923 int32_t ril;
924
925 h->flags &= ~HEADERFLAG_LEGACY;
926 ei2h(blob->pe, &entry->info);
927 ril = (entry->info.offset != 0) ? blob->ril : blob->il;
928
929 entry->info.offset = -(ril * sizeof(*blob->pe)); /* negative offset */
930 entry->data = blob->pe;
931 entry->length = blob->pvlen - sizeof(blob->il) - sizeof(blob->dl);
932 rdlen = regionSwab(entry+1, ril-1, 0, blob->pe+1,
933 blob->dataStart, blob->dataEnd,
934 entry->info.offset, fast);
935 if (rdlen < 0)
936 goto errxit;
937 entry->rdlen = rdlen;
938
939 if (ril < h->indexUsed) {
940 indexEntry newEntry = entry + ril;
941 int ne = (h->indexUsed - ril);
942 int rid = entry->info.offset+1;
943
944 /* Load dribble entries from region. */
945 rdlen = regionSwab(newEntry, ne, rdlen, blob->pe+ril,
946 blob->dataStart, blob->dataEnd, rid, fast);
947 if (rdlen < 0)
948 goto errxit;
949
950 { indexEntry firstEntry = newEntry;
951 int save = h->indexUsed;
952 int j;
953
954 /* Dribble entries replace duplicate region entries. */
955 h->indexUsed -= ne;
956 for (j = 0; j < ne; j++, newEntry++) {
957 (void) headerDel(h, newEntry->info.tag);
958 if (newEntry->info.tag == RPMTAG_BASENAMES)
959 (void) headerDel(h, RPMTAG_OLDFILENAMES);
960 }
961
962 /* If any duplicate entries were replaced, move new entries down. */
963 if (h->indexUsed < (save - ne)) {
964 memmove(h->index + h->indexUsed, firstEntry,
965 (ne * sizeof(*entry)));
966 }
967 h->indexUsed += ne;
968 }
969 }
970
971 rdlen += REGION_TAG_COUNT;
972
973 if (rdlen != blob->dl)
974 goto errxit;
975 }
976
977 /* Force sorting, dribble lookups can cause early sort on partial header */
978 h->sorted = 0;
979 headerSort(h);
980 h->flags |= HEADERFLAG_ALLOCATED;
981 *hdrp = h;
982
983 /* We own the memory now, avoid double-frees */
984 blob->ei = NULL;
985
986 return RPMRC_OK;
987
988 errxit:
989 if (h) {
990 free(h->index);
991 free(h);
992 rasprintf(emsg, _("hdr load: BAD"));
993 }
994 return RPMRC_FAIL;
995 }
996
headerReload(Header h,rpmTagVal tag)997 Header headerReload(Header h, rpmTagVal tag)
998 {
999 Header nh;
1000 unsigned int uc = 0;
1001 void * uh = headerExport(h, &uc);
1002
1003 h = headerFree(h);
1004 if (uh == NULL)
1005 return NULL;
1006 nh = headerImport(uh, uc, 0);
1007 if (nh == NULL) {
1008 uh = _free(uh);
1009 return NULL;
1010 }
1011 if (ENTRY_IS_REGION(nh->index)) {
1012 if (tag == RPMTAG_HEADERSIGNATURES || tag == RPMTAG_HEADERIMMUTABLE)
1013 nh->index[0].info.tag = tag;
1014 }
1015 return nh;
1016 }
1017
headerLoad(void * uh)1018 Header headerLoad(void * uh)
1019 {
1020 return headerImport(uh, 0, 0);
1021 }
1022
headerCopyLoad(const void * uh)1023 Header headerCopyLoad(const void * uh)
1024 {
1025 /* Discards const but that's ok as we'll take a copy */
1026 return headerImport((void *)uh, 0, HEADERIMPORT_COPY);
1027 }
1028
headerRead(FD_t fd,int magicp)1029 Header headerRead(FD_t fd, int magicp)
1030 {
1031 Header h = NULL;
1032 struct hdrblob_s blob;
1033 char *buf = NULL;
1034
1035 if (hdrblobRead(fd, magicp, 0, 0, &blob, &buf) == RPMRC_OK)
1036 hdrblobImport(&blob, 0, &h, &buf);
1037
1038 free(buf);
1039 return h;
1040 }
1041
headerWrite(FD_t fd,Header h,int magicp)1042 int headerWrite(FD_t fd, Header h, int magicp)
1043 {
1044 ssize_t nb;
1045 unsigned int length;
1046 void * uh = headerExport(h, &length);
1047
1048 if (uh == NULL)
1049 return 1;
1050
1051 if (magicp == HEADER_MAGIC_YES) {
1052 nb = Fwrite(rpm_header_magic, sizeof(rpm_header_magic), 1, fd);
1053 if (nb != sizeof(rpm_header_magic))
1054 goto exit;
1055 }
1056
1057 nb = Fwrite(uh, sizeof(char), length, fd);
1058
1059 exit:
1060 free(uh);
1061 return (nb == length ? 0 : 1);
1062 }
1063
headerIsEntry(Header h,rpmTagVal tag)1064 int headerIsEntry(Header h, rpmTagVal tag)
1065 {
1066 /* FIX: h modified by sort. */
1067 return (findEntry(h, tag, RPM_NULL_TYPE) ? 1 : 0);
1068
1069 }
1070
1071 /* simple heuristic to find out if the header is from * a source rpm
1072 * or not: source rpms contain at least the spec file and have all
1073 * files in one directory with an empty name.
1074 */
headerIsSourceHeuristic(Header h)1075 int headerIsSourceHeuristic(Header h)
1076 {
1077 indexEntry entry = findEntry(h, RPMTAG_DIRNAMES, RPM_STRING_ARRAY_TYPE);
1078 return entry && entry->info.count == 1 && entry->data && !*(const char *)entry->data;
1079 }
1080
1081 /** \ingroup header
1082 * Retrieve data from header entry.
1083 * Relevant flags (others are ignored), if neither is set allocation
1084 * behavior depends on data type(!)
1085 * HEADERGET_MINMEM: return pointers to header memory
1086 * HEADERGET_ALLOC: always return malloced memory, overrides MINMEM
1087 *
1088 * @todo Permit retrieval of regions other than HEADER_IMUTABLE.
1089 * @param entry header entry
1090 * @param td tag data container
1091 * @param flags flags to control memory allocation
1092 * @return 1 on success, otherwise error.
1093 */
copyTdEntry(const indexEntry entry,rpmtd td,headerGetFlags flags)1094 static int copyTdEntry(const indexEntry entry, rpmtd td, headerGetFlags flags)
1095 {
1096 rpm_count_t count = entry->info.count;
1097 int rc = 1; /* XXX 1 on success. */
1098 /* ALLOC overrides MINMEM */
1099 int allocMem = flags & HEADERGET_ALLOC;
1100 int minMem = allocMem ? 0 : flags & HEADERGET_MINMEM;
1101 int argvArray = (flags & HEADERGET_ARGV) ? 1 : 0;
1102
1103 assert(td != NULL);
1104 td->flags = RPMTD_IMMUTABLE;
1105 switch (entry->info.type) {
1106 case RPM_BIN_TYPE:
1107 /*
1108 * XXX This only works for
1109 * XXX "sealed" HEADER_IMMUTABLE/HEADER_SIGNATURES/HEADER_IMAGE.
1110 * XXX This will *not* work for unsealed legacy HEADER_IMAGE (i.e.
1111 * XXX a legacy header freshly read, but not yet unloaded to the rpmdb).
1112 */
1113 if (ENTRY_IS_REGION(entry)) {
1114 int32_t * ei = ((int32_t *)entry->data) - 2;
1115 entryInfo pe = (entryInfo) (ei + 2);
1116 unsigned char * dataStart = (unsigned char *) (pe + ntohl(ei[0]));
1117 int32_t rdl = -entry->info.offset; /* negative offset */
1118 int32_t ril = rdl/sizeof(*pe);
1119
1120 rdl = entry->rdlen;
1121 count = 2 * sizeof(*ei) + (ril * sizeof(*pe)) + rdl;
1122 if (entry->info.tag == RPMTAG_HEADERIMAGE) {
1123 ril -= 1;
1124 pe += 1;
1125 } else {
1126 count += REGION_TAG_COUNT;
1127 rdl += REGION_TAG_COUNT;
1128 }
1129
1130 td->data = xmalloc(count);
1131 ei = (int32_t *) td->data;
1132 ei[0] = htonl(ril);
1133 ei[1] = htonl(rdl);
1134
1135 pe = (entryInfo) memcpy(ei + 2, pe, (ril * sizeof(*pe)));
1136
1137 dataStart = (unsigned char *) memcpy(pe + ril, dataStart, rdl);
1138
1139 rc = regionSwab(NULL, ril, 0, pe, dataStart, dataStart + rdl, 0, 0);
1140 /* don't return data on failure */
1141 if (rc < 0) {
1142 td->data = _free(td->data);
1143 }
1144 /* XXX 1 on success. */
1145 rc = (rc < 0) ? 0 : 1;
1146 } else {
1147 td->data = (!minMem
1148 ? memcpy(xmalloc(count), entry->data, count)
1149 : entry->data);
1150 }
1151 break;
1152 case RPM_STRING_TYPE:
1153 /* simple string, but fallthrough if its actually an array */
1154 if (count == 1 && !argvArray) {
1155 td->data = allocMem ? xstrdup(entry->data) : entry->data;
1156 break;
1157 }
1158 case RPM_STRING_ARRAY_TYPE:
1159 case RPM_I18NSTRING_TYPE:
1160 { const char ** ptrEntry;
1161 int tableSize = (count + argvArray) * sizeof(char *);
1162 char * t;
1163 int i;
1164
1165 if (minMem) {
1166 td->data = xmalloc(tableSize);
1167 ptrEntry = (const char **) td->data;
1168 t = entry->data;
1169 } else {
1170 t = xmalloc(tableSize + entry->length);
1171 td->data = (void *)t;
1172 ptrEntry = (const char **) td->data;
1173 t += tableSize;
1174 memcpy(t, entry->data, entry->length);
1175 }
1176 for (i = 0; i < count; i++) {
1177 *ptrEntry++ = t;
1178 t = strchr(t, 0);
1179 t++;
1180 }
1181 if (argvArray) {
1182 *ptrEntry = NULL;
1183 td->flags |= RPMTD_ARGV;
1184 }
1185 } break;
1186 case RPM_CHAR_TYPE:
1187 case RPM_INT8_TYPE:
1188 case RPM_INT16_TYPE:
1189 case RPM_INT32_TYPE:
1190 case RPM_INT64_TYPE:
1191 if (allocMem) {
1192 td->data = xmalloc(entry->length);
1193 memcpy(td->data, entry->data, entry->length);
1194 } else {
1195 td->data = entry->data;
1196 }
1197 break;
1198 default:
1199 /* WTH? Don't mess with unknown data types... */
1200 rc = 0;
1201 td->data = NULL;
1202 break;
1203 }
1204 td->type = entry->info.type;
1205 td->count = count;
1206 td->size = entry->length;
1207
1208 if (td->data && entry->data != td->data) {
1209 td->flags |= RPMTD_ALLOCED;
1210 }
1211
1212 return rc;
1213 }
1214
1215 /**
1216 * Does locale match entry in header i18n table?
1217 *
1218 * \verbatim
1219 * The range [l,le) contains the next locale to match:
1220 * ll[_CC][.EEEEE][@dddd]
1221 * where
1222 * ll ISO language code (in lowercase).
1223 * CC (optional) ISO coutnry code (in uppercase).
1224 * EEEEE (optional) encoding (not really standardized).
1225 * dddd (optional) dialect.
1226 * \endverbatim
1227 *
1228 * @param td header i18n table data, NUL terminated
1229 * @param l start of locale to match
1230 * @param le end of locale to match
1231 * @return 1 on good match, 2 on weak match, 0 on no match
1232 */
headerMatchLocale(const char * td,const char * l,const char * le)1233 static int headerMatchLocale(const char *td, const char *l, const char *le)
1234 {
1235 const char *fe;
1236
1237 /* First try a complete match. */
1238 if (strlen(td) == (le-l) && rstreqn(td, l, (le - l)))
1239 return 1;
1240
1241 /* Next, try stripping optional dialect and matching. */
1242 for (fe = l; fe < le && *fe != '@'; fe++)
1243 {};
1244 if (fe < le && rstreqn(td, l, (fe - l)))
1245 return 1;
1246
1247 /* Next, try stripping optional codeset and matching. */
1248 for (fe = l; fe < le && *fe != '.'; fe++)
1249 {};
1250 if (fe < le && rstreqn(td, l, (fe - l)))
1251 return 1;
1252
1253 /* Finally, try stripping optional country code and matching. */
1254 for (fe = l; fe < le && *fe != '_'; fe++)
1255 {};
1256 if (fe < le && rstreqn(td, l, (fe - l)))
1257 return 2;
1258
1259 return 0;
1260 }
1261
1262 /**
1263 * Return i18n string from header that matches locale.
1264 * @param h header
1265 * @param entry i18n string data
1266 * @retval td tag data container
1267 * @param flags flags to control allocation
1268 * @return 1 always
1269 */
copyI18NEntry(Header h,indexEntry entry,rpmtd td,headerGetFlags flags)1270 static int copyI18NEntry(Header h, indexEntry entry, rpmtd td,
1271 headerGetFlags flags)
1272 {
1273 const char *lang, *l, *le;
1274 indexEntry table;
1275
1276 td->type = RPM_STRING_TYPE;
1277 td->count = 1;
1278 /* if no match, just return the first string */
1279 td->data = entry->data;
1280
1281 /* XXX Drepper sez' this is the order. */
1282 if ((lang = getenv("LANGUAGE")) == NULL &&
1283 (lang = getenv("LC_ALL")) == NULL &&
1284 (lang = getenv("LC_MESSAGES")) == NULL &&
1285 (lang = getenv("LANG")) == NULL)
1286 goto exit;
1287
1288 if ((table = findEntry(h, RPMTAG_HEADERI18NTABLE, RPM_STRING_ARRAY_TYPE)) == NULL)
1289 goto exit;
1290
1291 for (l = lang; *l != '\0'; l = le) {
1292 const char *t;
1293 char *ed, *ed_weak = NULL;
1294 int langNum;
1295
1296 while (*l && *l == ':') /* skip leading colons */
1297 l++;
1298 if (*l == '\0')
1299 break;
1300 for (le = l; *le && *le != ':'; le++) /* find end of this locale */
1301 {};
1302
1303 /* For each entry in the header ... */
1304 for (langNum = 0, t = table->data, ed = entry->data;
1305 langNum < entry->info.count;
1306 langNum++, t += strlen(t) + 1, ed += strlen(ed) + 1) {
1307
1308 int match = headerMatchLocale(t, l, le);
1309 if (match == 1) {
1310 td->data = ed;
1311 goto exit;
1312 } else if (match == 2) {
1313 ed_weak = ed;
1314 }
1315 }
1316 if (ed_weak) {
1317 td->data = ed_weak;
1318 goto exit;
1319 }
1320 }
1321
1322 exit:
1323 if (flags & HEADERGET_ALLOC) {
1324 td->data = xstrdup(td->data);
1325 td->flags |= RPMTD_ALLOCED;
1326 }
1327
1328 return 1;
1329 }
1330
1331 /**
1332 * Retrieve tag data from header.
1333 * @param h header
1334 * @retval td tag data container
1335 * @param flags flags to control retrieval
1336 * @return 1 on success, 0 on not found
1337 */
intGetTdEntry(Header h,rpmtd td,headerGetFlags flags)1338 static int intGetTdEntry(Header h, rpmtd td, headerGetFlags flags)
1339 {
1340 indexEntry entry;
1341 int rc;
1342
1343 /* First find the tag */
1344 /* FIX: h modified by sort. */
1345 entry = findEntry(h, td->tag, RPM_NULL_TYPE);
1346 if (entry == NULL) {
1347 /* Td is zeroed above, just return... */
1348 return 0;
1349 }
1350
1351 if (entry->info.type == RPM_I18NSTRING_TYPE && !(flags & HEADERGET_RAW))
1352 rc = copyI18NEntry(h, entry, td, flags);
1353 else
1354 rc = copyTdEntry(entry, td, flags);
1355
1356 if (rc == 0)
1357 td->flags |= RPMTD_INVALID;
1358
1359 /* XXX 1 on success */
1360 return ((rc == 1) ? 1 : 0);
1361 }
1362
headerGet(Header h,rpmTagVal tag,rpmtd td,headerGetFlags flags)1363 int headerGet(Header h, rpmTagVal tag, rpmtd td, headerGetFlags flags)
1364 {
1365 int rc;
1366 headerTagTagFunction tagfunc = intGetTdEntry;
1367
1368 if (td == NULL) return 0;
1369
1370 rpmtdReset(td);
1371 td->tag = tag;
1372
1373 if (flags & HEADERGET_EXT) {
1374 headerTagTagFunction extfunc = rpmHeaderTagFunc(tag);
1375 if (extfunc) tagfunc = extfunc;
1376 }
1377 rc = tagfunc(h, td, flags);
1378
1379 assert(tag == td->tag);
1380 return rc;
1381 }
1382
1383 /**
1384 */
copyData(rpm_tagtype_t type,rpm_data_t dstPtr,rpm_constdata_t srcPtr,rpm_count_t cnt,int dataLength)1385 static void copyData(rpm_tagtype_t type, rpm_data_t dstPtr,
1386 rpm_constdata_t srcPtr, rpm_count_t cnt, int dataLength)
1387 {
1388 switch (type) {
1389 case RPM_STRING_ARRAY_TYPE:
1390 case RPM_I18NSTRING_TYPE:
1391 { const char ** av = (const char **) srcPtr;
1392 char * t = dstPtr;
1393
1394 while (cnt-- > 0 && dataLength > 0) {
1395 const char * s;
1396 if ((s = *av++) == NULL)
1397 continue;
1398 do {
1399 *t++ = *s++;
1400 } while (s[-1] && --dataLength > 0);
1401 }
1402 } break;
1403
1404 default:
1405 memmove(dstPtr, srcPtr, dataLength);
1406 break;
1407 }
1408 }
1409
1410 /**
1411 * Return (malloc'ed) copy of entry data.
1412 * @param type entry data type
1413 * @param p entry data
1414 * @param c entry item count
1415 * @retval lengthPtr no. bytes in returned data
1416 * @return (malloc'ed) copy of entry data, NULL on error
1417 */
1418 static void *
grabData(rpm_tagtype_t type,rpm_constdata_t p,rpm_count_t c,int * lengthPtr)1419 grabData(rpm_tagtype_t type, rpm_constdata_t p, rpm_count_t c, int * lengthPtr)
1420 {
1421 rpm_data_t data = NULL;
1422 int length;
1423
1424 length = dataLength(type, p, c, 0, NULL);
1425 if (length > 0) {
1426 data = xmalloc(length);
1427 copyData(type, data, p, c, length);
1428 }
1429
1430 if (lengthPtr)
1431 *lengthPtr = length;
1432 return data;
1433 }
1434
intAddEntry(Header h,rpmtd td)1435 static int intAddEntry(Header h, rpmtd td)
1436 {
1437 indexEntry entry;
1438 rpm_data_t data;
1439 int length = 0;
1440
1441 /* Count must always be >= 1 for headerAddEntry. */
1442 if (td->count <= 0)
1443 return 0;
1444
1445 if (hdrchkType(td->type))
1446 return 0;
1447 if (hdrchkData(td->count))
1448 return 0;
1449
1450 data = grabData(td->type, td->data, td->count, &length);
1451 if (data == NULL)
1452 return 0;
1453
1454 /* Allocate more index space if necessary */
1455 if (h->indexUsed == h->indexAlloced) {
1456 h->indexAlloced += INDEX_MALLOC_SIZE;
1457 h->index = xrealloc(h->index, h->indexAlloced * sizeof(*h->index));
1458 }
1459
1460 /* Fill in the index */
1461 entry = h->index + h->indexUsed;
1462 entry->info.tag = td->tag;
1463 entry->info.type = td->type;
1464 entry->info.count = td->count;
1465 entry->info.offset = 0;
1466 entry->data = data;
1467 entry->length = length;
1468
1469 if (h->indexUsed > 0 && td->tag < h->index[h->indexUsed-1].info.tag)
1470 h->sorted = 0;
1471 h->indexUsed++;
1472
1473 return 1;
1474 }
1475
intAppendEntry(Header h,rpmtd td)1476 static int intAppendEntry(Header h, rpmtd td)
1477 {
1478 indexEntry entry;
1479 int length;
1480
1481 if (td->type == RPM_STRING_TYPE || td->type == RPM_I18NSTRING_TYPE) {
1482 /* we can't do this */
1483 return 0;
1484 }
1485
1486 /* Find the tag entry in the header. */
1487 entry = findEntry(h, td->tag, td->type);
1488 if (!entry)
1489 return 0;
1490
1491 length = dataLength(td->type, td->data, td->count, 0, NULL);
1492 if (length < 0)
1493 return 0;
1494
1495 if (ENTRY_IN_REGION(entry)) {
1496 char * t = xmalloc(entry->length + length);
1497 memcpy(t, entry->data, entry->length);
1498 entry->data = t;
1499 entry->info.offset = 0;
1500 } else
1501 entry->data = xrealloc(entry->data, entry->length + length);
1502
1503 copyData(td->type, ((char *) entry->data) + entry->length,
1504 td->data, td->count, length);
1505
1506 entry->length += length;
1507
1508 entry->info.count += td->count;
1509
1510 return 1;
1511 }
1512
headerPut(Header h,rpmtd td,headerPutFlags flags)1513 int headerPut(Header h, rpmtd td, headerPutFlags flags)
1514 {
1515 int rc;
1516
1517 assert(td != NULL);
1518 if (flags & HEADERPUT_APPEND) {
1519 rc = findEntry(h, td->tag, td->type) ?
1520 intAppendEntry(h, td) :
1521 intAddEntry(h, td);
1522 } else {
1523 rc = intAddEntry(h, td);
1524 }
1525 return rc;
1526 }
1527
headerAddI18NString(Header h,rpmTagVal tag,const char * string,const char * lang)1528 int headerAddI18NString(Header h, rpmTagVal tag, const char * string,
1529 const char * lang)
1530 {
1531 indexEntry table, entry;
1532 const char ** strArray;
1533 int length;
1534 int ghosts;
1535 rpm_count_t i, langNum;
1536 char * buf;
1537
1538 table = findEntry(h, RPMTAG_HEADERI18NTABLE, RPM_STRING_ARRAY_TYPE);
1539 entry = findEntry(h, tag, RPM_I18NSTRING_TYPE);
1540
1541 if (!table && entry)
1542 return 0; /* this shouldn't ever happen!! */
1543
1544 if (!table && !entry) {
1545 const char * charArray[2];
1546 rpm_count_t count = 0;
1547 struct rpmtd_s td;
1548 if (!lang || (lang[0] == 'C' && lang[1] == '\0')) {
1549 charArray[count++] = "C";
1550 } else {
1551 charArray[count++] = "C";
1552 charArray[count++] = lang;
1553 }
1554
1555 rpmtdReset(&td);
1556 td.tag = RPMTAG_HEADERI18NTABLE;
1557 td.type = RPM_STRING_ARRAY_TYPE;
1558 td.data = (void *) charArray;
1559 td.count = count;
1560 if (!headerPut(h, &td, HEADERPUT_DEFAULT))
1561 return 0;
1562 table = findEntry(h, RPMTAG_HEADERI18NTABLE, RPM_STRING_ARRAY_TYPE);
1563 }
1564
1565 if (!table)
1566 return 0;
1567 if (!lang) lang = "C";
1568
1569 { const char * l = table->data;
1570 for (langNum = 0; langNum < table->info.count; langNum++) {
1571 if (rstreq(l, lang)) break;
1572 l += strlen(l) + 1;
1573 }
1574 }
1575
1576 if (langNum >= table->info.count) {
1577 length = strlen(lang) + 1;
1578 if (ENTRY_IN_REGION(table)) {
1579 char * t = xmalloc(table->length + length);
1580 memcpy(t, table->data, table->length);
1581 table->data = t;
1582 table->info.offset = 0;
1583 } else
1584 table->data = xrealloc(table->data, table->length + length);
1585 memmove(((char *)table->data) + table->length, lang, length);
1586 table->length += length;
1587 table->info.count++;
1588 }
1589
1590 if (!entry) {
1591 int rc;
1592 struct rpmtd_s td;
1593 strArray = xmalloc(sizeof(*strArray) * (langNum + 1));
1594 for (i = 0; i < langNum; i++)
1595 strArray[i] = "";
1596 strArray[langNum] = string;
1597
1598 rpmtdReset(&td);
1599 td.tag = tag;
1600 td.type = RPM_I18NSTRING_TYPE;
1601 td.data = strArray;
1602 td.count = langNum + 1;
1603 rc = headerPut(h, &td, HEADERPUT_DEFAULT);
1604 free(strArray);
1605 return rc;
1606 } else if (langNum >= entry->info.count) {
1607 ghosts = langNum - entry->info.count;
1608
1609 length = strlen(string) + 1 + ghosts;
1610 if (ENTRY_IN_REGION(entry)) {
1611 char * t = xmalloc(entry->length + length);
1612 memcpy(t, entry->data, entry->length);
1613 entry->data = t;
1614 entry->info.offset = 0;
1615 } else
1616 entry->data = xrealloc(entry->data, entry->length + length);
1617
1618 memset(((char *)entry->data) + entry->length, '\0', ghosts);
1619 memmove(((char *)entry->data) + entry->length + ghosts, string, strlen(string)+1);
1620
1621 entry->length += length;
1622 entry->info.count = langNum + 1;
1623 } else {
1624 char *b, *be, *e, *ee, *t;
1625 size_t bn, sn, en;
1626
1627 /* Set beginning/end pointers to previous data */
1628 b = be = e = ee = entry->data;
1629 for (i = 0; i < table->info.count; i++) {
1630 if (i == langNum)
1631 be = ee;
1632 ee += strlen(ee) + 1;
1633 if (i == langNum)
1634 e = ee;
1635 }
1636
1637 /* Get storage for new buffer */
1638 bn = (be-b);
1639 sn = strlen(string) + 1;
1640 en = (ee-e);
1641 length = bn + sn + en;
1642 t = buf = xmalloc(length);
1643
1644 /* Copy values into new storage */
1645 memcpy(t, b, bn);
1646 t += bn;
1647 memcpy(t, string, sn);
1648 t += sn;
1649 memcpy(t, e, en);
1650 t += en;
1651
1652 /* Replace i18N string array */
1653 entry->length -= strlen(be) + 1;
1654 entry->length += sn;
1655
1656 if (ENTRY_IN_REGION(entry)) {
1657 entry->info.offset = 0;
1658 } else
1659 entry->data = _free(entry->data);
1660 entry->data = buf;
1661 }
1662
1663 return 0;
1664 }
1665
headerMod(Header h,rpmtd td)1666 int headerMod(Header h, rpmtd td)
1667 {
1668 indexEntry entry;
1669 rpm_data_t oldData;
1670 rpm_data_t data;
1671 int length = 0;
1672
1673 /* First find the tag */
1674 entry = findEntry(h, td->tag, td->type);
1675 if (!entry)
1676 return 0;
1677
1678 data = grabData(td->type, td->data, td->count, &length);
1679 if (data == NULL)
1680 return 0;
1681
1682 /* make sure entry points to the first occurrence of this tag */
1683 while (entry > h->index && (entry - 1)->info.tag == td->tag)
1684 entry--;
1685
1686 /* free after we've grabbed the new data in case the two are intertwined;
1687 that's a bad idea but at least we won't break */
1688 oldData = entry->data;
1689
1690 entry->info.count = td->count;
1691 entry->info.type = td->type;
1692 entry->data = data;
1693 entry->length = length;
1694
1695 if (ENTRY_IN_REGION(entry)) {
1696 entry->info.offset = 0;
1697 } else
1698 free(oldData);
1699
1700 return 1;
1701 }
1702
1703 /**
1704 * Header tag iterator data structure.
1705 */
1706 struct headerIterator_s {
1707 Header h; /*!< Header being iterated. */
1708 int next_index; /*!< Next tag index. */
1709 };
1710
headerFreeIterator(HeaderIterator hi)1711 HeaderIterator headerFreeIterator(HeaderIterator hi)
1712 {
1713 if (hi != NULL) {
1714 hi->h = headerFree(hi->h);
1715 hi = _free(hi);
1716 }
1717 return NULL;
1718 }
1719
headerInitIterator(Header h)1720 HeaderIterator headerInitIterator(Header h)
1721 {
1722 HeaderIterator hi = xmalloc(sizeof(*hi));
1723
1724 headerSort(h);
1725
1726 hi->h = headerLink(h);
1727 hi->next_index = 0;
1728 return hi;
1729 }
1730
nextIndex(HeaderIterator hi)1731 static indexEntry nextIndex(HeaderIterator hi)
1732 {
1733 Header h = hi->h;
1734 int slot;
1735 indexEntry entry = NULL;
1736
1737 for (slot = hi->next_index; slot < h->indexUsed; slot++) {
1738 entry = h->index + slot;
1739 if (!ENTRY_IS_REGION(entry))
1740 break;
1741 }
1742 hi->next_index = slot;
1743 if (entry == NULL || slot >= h->indexUsed)
1744 return NULL;
1745
1746 hi->next_index++;
1747 return entry;
1748 }
1749
headerNextTag(HeaderIterator hi)1750 rpmTagVal headerNextTag(HeaderIterator hi)
1751 {
1752 indexEntry entry = nextIndex(hi);
1753 return entry ? entry->info.tag : RPMTAG_NOT_FOUND;
1754 }
1755
headerNext(HeaderIterator hi,rpmtd td)1756 int headerNext(HeaderIterator hi, rpmtd td)
1757 {
1758 indexEntry entry = nextIndex(hi);
1759 int rc = 0;
1760
1761 rpmtdReset(td);
1762 if (entry) {
1763 td->tag = entry->info.tag;
1764 rc = copyTdEntry(entry, td, HEADERGET_DEFAULT);
1765 }
1766 return ((rc == 1) ? 1 : 0);
1767 }
1768
headerGetInstance(Header h)1769 unsigned int headerGetInstance(Header h)
1770 {
1771 return h ? h->instance : 0;
1772 }
1773
headerSetInstance(Header h,unsigned int instance)1774 void headerSetInstance(Header h, unsigned int instance)
1775 {
1776 h->instance = instance;
1777 }
1778
1779 #define RETRY_ERROR(_err) \
1780 ((_err) == EINTR || (_err) == EAGAIN || (_err) == EWOULDBLOCK)
1781
Freadall(FD_t fd,void * buf,ssize_t size)1782 ssize_t Freadall(FD_t fd, void * buf, ssize_t size)
1783 {
1784 ssize_t total = 0;
1785 ssize_t nb = 0;
1786 char * bufp = buf;
1787
1788 while (total < size) {
1789 nb = Fread(bufp, 1, size - total, fd);
1790
1791 if (nb == 0 || (nb < 0 && !RETRY_ERROR(errno))) {
1792 total = nb;
1793 break;
1794 }
1795
1796 if (nb > 0) {
1797 bufp += nb;
1798 total += nb;
1799 }
1800 }
1801
1802 return total;
1803 }
1804
hdrblobVerifyRegion(rpmTagVal regionTag,int exact_size,hdrblob blob,char ** buf)1805 static rpmRC hdrblobVerifyRegion(rpmTagVal regionTag, int exact_size,
1806 hdrblob blob, char **buf)
1807 {
1808 rpmRC rc = RPMRC_FAIL;
1809 struct entryInfo_s trailer, einfo;
1810 unsigned char * regionEnd = NULL;
1811
1812 /* Check that we have at least on tag */
1813 if (blob->il < 1) {
1814 rasprintf(buf, _("region: no tags"));
1815 goto exit;
1816 }
1817
1818 /* Convert the 1st tag element. */
1819 ei2h(blob->pe, &einfo);
1820
1821 if (!regionTag && (einfo.tag == RPMTAG_HEADERSIGNATURES ||
1822 einfo.tag == RPMTAG_HEADERIMMUTABLE ||
1823 einfo.tag == RPMTAG_HEADERIMAGE)) {
1824 regionTag = einfo.tag;
1825 }
1826
1827 /* Is there an immutable header region tag? */
1828 if (!(einfo.tag == regionTag)) {
1829 rc = RPMRC_NOTFOUND;
1830 goto exit;
1831 }
1832
1833 /* Is the region tag sane? */
1834 if (!(einfo.type == REGION_TAG_TYPE && einfo.count == REGION_TAG_COUNT)) {
1835 rasprintf(buf,
1836 _("region tag: BAD, tag %d type %d offset %d count %d"),
1837 einfo.tag, einfo.type, einfo.offset, einfo.count);
1838 goto exit;
1839 }
1840
1841 /* Is the trailer within the data area? */
1842 if (hdrchkRange(blob->dl, einfo.offset + REGION_TAG_COUNT)) {
1843 rasprintf(buf,
1844 _("region offset: BAD, tag %d type %d offset %d count %d"),
1845 einfo.tag, einfo.type, einfo.offset, einfo.count);
1846 goto exit;
1847 }
1848
1849 /* Is there an immutable header region tag trailer? */
1850 memset(&trailer, 0, sizeof(trailer));
1851 regionEnd = blob->dataStart + einfo.offset;
1852 (void) memcpy(&trailer, regionEnd, REGION_TAG_COUNT);
1853 regionEnd += REGION_TAG_COUNT;
1854 blob->rdl = regionEnd - blob->dataStart;
1855
1856 ei2h(&trailer, &einfo);
1857 /* Trailer offset is negative and has a special meaning */
1858 einfo.offset = -einfo.offset;
1859 /* Some old packages have HEADERIMAGE in signature region trailer, fix up */
1860 if (regionTag == RPMTAG_HEADERSIGNATURES && einfo.tag == RPMTAG_HEADERIMAGE)
1861 einfo.tag = RPMTAG_HEADERSIGNATURES;
1862 if (!(einfo.tag == regionTag &&
1863 einfo.type == REGION_TAG_TYPE && einfo.count == REGION_TAG_COUNT))
1864 {
1865 rasprintf(buf,
1866 _("region trailer: BAD, tag %d type %d offset %d count %d"),
1867 einfo.tag, einfo.type, einfo.offset, einfo.count);
1868 goto exit;
1869 }
1870
1871 /* Does the region actually fit within the header? */
1872 blob->ril = einfo.offset/sizeof(*blob->pe);
1873 if ((einfo.offset % sizeof(*blob->pe)) || hdrchkRange(blob->il, blob->ril) ||
1874 hdrchkRange(blob->dl, blob->rdl)) {
1875 rasprintf(buf, _("region %d size: BAD, ril %d il %d rdl %d dl %d"),
1876 regionTag, blob->ril, blob->il, blob->rdl, blob->dl);
1877 goto exit;
1878 }
1879
1880 /* In package files region size is expected to match header size. */
1881 if (exact_size && !(blob->il == blob->ril && blob->dl == blob->rdl)) {
1882 rasprintf(buf,
1883 _("region %d: tag number mismatch il %d ril %d dl %d rdl %d\n"),
1884 regionTag, blob->il, blob->ril, blob->dl, blob->rdl);
1885 goto exit;
1886 }
1887
1888 blob->regionTag = regionTag;
1889 rc = RPMRC_OK;
1890
1891 exit:
1892 return rc;
1893 }
1894
hdrblobCreate(void)1895 hdrblob hdrblobCreate(void)
1896 {
1897 hdrblob blob = xcalloc(1, sizeof(*blob));
1898 return blob;
1899 }
1900
hdrblobFree(hdrblob blob)1901 hdrblob hdrblobFree(hdrblob blob)
1902 {
1903 if (blob) {
1904 free(blob->ei);
1905 free(blob);
1906 }
1907 return NULL;
1908 }
1909
hdrblobVerifyLengths(rpmTagVal regionTag,uint32_t il,uint32_t dl,char ** emsg)1910 static rpmRC hdrblobVerifyLengths(rpmTagVal regionTag, uint32_t il, uint32_t dl,
1911 char **emsg) {
1912 uint32_t il_max = HEADER_TAGS_MAX;
1913 uint32_t dl_max = HEADER_DATA_MAX;
1914 if (regionTag == RPMTAG_HEADERSIGNATURES) {
1915 il_max = 32;
1916 dl_max = 64 * 1024 * 1024;
1917 }
1918 if (hdrchkRange(il_max, il)) {
1919 rasprintf(emsg, _("hdr tags: BAD, no. of tags(%" PRIu32 ") out of range"), il);
1920 return RPMRC_FAIL;
1921 }
1922 if (hdrchkRange(dl_max, dl)) {
1923 rasprintf(emsg, _("hdr data: BAD, no. of bytes(%" PRIu32 ") out of range"), dl);
1924 return RPMRC_FAIL;
1925 }
1926 return RPMRC_OK;
1927 }
1928
hdrblobRead(FD_t fd,int magic,int exact_size,rpmTagVal regionTag,hdrblob blob,char ** emsg)1929 rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrblob blob, char **emsg)
1930 {
1931 int32_t block[4];
1932 int32_t *bs = (magic != 0) ? &block[0] : &block[2];
1933 int blen = (magic != 0) ? sizeof(block) : sizeof(block) / 2;
1934 int32_t il;
1935 int32_t dl;
1936 int32_t * ei = NULL;
1937 size_t uc;
1938 size_t nb;
1939 rpmRC rc = RPMRC_FAIL; /* assume failure */
1940 int xx;
1941
1942 memset(block, 0, sizeof(block));
1943 if ((xx = Freadall(fd, bs, blen)) != blen) {
1944 rasprintf(emsg,
1945 _("hdr size(%d): BAD, read returned %d"), blen, xx);
1946 goto exit;
1947 }
1948 if (magic && memcmp(block, rpm_header_magic, sizeof(rpm_header_magic))) {
1949 rasprintf(emsg, _("hdr magic: BAD"));
1950 goto exit;
1951 }
1952 il = ntohl(block[2]);
1953 dl = ntohl(block[3]);
1954 if (hdrblobVerifyLengths(regionTag, il, dl, emsg))
1955 goto exit;
1956
1957 nb = (il * sizeof(struct entryInfo_s)) + dl;
1958 uc = sizeof(il) + sizeof(dl) + nb;
1959 ei = xmalloc(uc);
1960 ei[0] = block[2];
1961 ei[1] = block[3];
1962 if ((xx = Freadall(fd, (char *)&ei[2], nb)) != nb) {
1963 rasprintf(emsg, _("hdr blob(%zd): BAD, read returned %d"), nb, xx);
1964 goto exit;
1965 }
1966
1967 if (regionTag == RPMTAG_HEADERSIGNATURES) {
1968 size_t sigSize = uc + sizeof(rpm_header_magic);
1969 size_t pad = (8 - (sigSize % 8)) % 8;
1970 size_t trc;
1971 if (pad && (trc = Freadall(fd, block, pad)) != pad) {
1972 rasprintf(emsg, _("sigh pad(%zd): BAD, read %zd bytes"), pad, trc);
1973 goto exit;
1974 }
1975 }
1976
1977 rc = hdrblobInit(ei, uc, regionTag, exact_size, blob, emsg);
1978
1979 exit:
1980 if (rc != RPMRC_OK) {
1981 free(ei);
1982 blob->ei = NULL;
1983 if (emsg && *emsg && regionTag == RPMTAG_HEADERSIGNATURES) {
1984 /* rstrscat() cannot handle overlap even if it claims so */
1985 char *tmp = rstrscat(NULL, _("signature "), *emsg, NULL);
1986 free(*emsg);
1987 *emsg = tmp;
1988 }
1989 }
1990
1991 return rc;
1992 }
1993
hdrblobInit(const void * uh,size_t uc,rpmTagVal regionTag,int exact_size,struct hdrblob_s * blob,char ** emsg)1994 rpmRC hdrblobInit(const void *uh, size_t uc,
1995 rpmTagVal regionTag, int exact_size,
1996 struct hdrblob_s *blob, char **emsg)
1997 {
1998 rpmRC rc = RPMRC_FAIL;
1999 memset(blob, 0, sizeof(*blob));
2000 if (uc && uc < 8) {
2001 rasprintf(emsg, _("hdr length: BAD"));
2002 goto exit;
2003 }
2004
2005 blob->ei = (int32_t *) uh; /* discards const */
2006 blob->il = ntohl((uint32_t)(blob->ei[0]));
2007 blob->dl = ntohl((uint32_t)(blob->ei[1]));
2008 if (hdrblobVerifyLengths(regionTag, blob->il, blob->dl, emsg) != RPMRC_OK)
2009 goto exit;
2010
2011 blob->pe = (entryInfo) &(blob->ei[2]);
2012 blob->pvlen = sizeof(blob->il) + sizeof(blob->dl) +
2013 (blob->il * sizeof(*blob->pe)) + blob->dl;
2014 blob->dataStart = (uint8_t *) (blob->pe + blob->il);
2015 blob->dataEnd = blob->dataStart + blob->dl;
2016
2017 /* Is the blob the right size? */
2018 if (blob->pvlen >= headerMaxbytes || (uc && blob->pvlen != uc)) {
2019 rasprintf(emsg, _("blob size(%d): BAD, 8 + 16 * il(%d) + dl(%d)"),
2020 blob->pvlen, blob->il, blob->dl);
2021 goto exit;
2022 }
2023
2024 if (hdrblobVerifyRegion(regionTag, exact_size, blob, emsg) == RPMRC_FAIL)
2025 goto exit;
2026
2027 /* Sanity check the rest of the header structure. */
2028 if (hdrblobVerifyInfo(blob, emsg))
2029 goto exit;
2030
2031 rc = RPMRC_OK;
2032
2033 exit:
2034 return rc;
2035 }
2036
hdrblobGet(hdrblob blob,uint32_t tag,rpmtd td)2037 rpmRC hdrblobGet(hdrblob blob, uint32_t tag, rpmtd td)
2038 {
2039 rpmRC rc = RPMRC_NOTFOUND;
2040 struct indexEntry_s entry;
2041 struct entryInfo_s einfo;
2042 const struct entryInfo_s *pe = blob->pe;
2043 uint32_t ntag = htonl(tag);
2044 int tsize;
2045
2046 memset(&einfo, 0, sizeof(einfo));
2047 rpmtdReset(td);
2048
2049 for (int i = 0; i < blob->il; i++, pe++) {
2050 if (pe->tag != ntag)
2051 continue;
2052 ei2h(pe, &einfo);
2053
2054 /* We can only handle non-byteswappable data */
2055 tsize = typeSizes[einfo.type];
2056 if (tsize != 1 && tsize != -1)
2057 return RPMRC_FAIL;
2058
2059 entry.info = einfo; /* struct assignment */
2060 entry.data = blob->dataStart + einfo.offset;
2061 entry.length = dataLength(einfo.type, blob->dataStart + einfo.offset,
2062 einfo.count, 1, blob->dataEnd);
2063 entry.rdlen = 0;
2064 td->tag = einfo.tag;
2065 rc = copyTdEntry(&entry, td, HEADERGET_MINMEM) ? RPMRC_OK : RPMRC_FAIL;
2066 break;
2067 }
2068 return rc;
2069 }
2070
headerImport(void * blob,unsigned int bsize,headerImportFlags flags)2071 Header headerImport(void * blob, unsigned int bsize, headerImportFlags flags)
2072 {
2073 Header h = NULL;
2074 struct hdrblob_s hblob;
2075 char *buf = NULL;
2076 void * b = blob;
2077
2078 if (flags & HEADERIMPORT_COPY) {
2079 if (bsize == 0 && hdrblobInit(b, 0, 0, 0, &hblob, &buf) == RPMRC_OK)
2080 bsize = hblob.pvlen;
2081 if (bsize == 0)
2082 goto exit;
2083 b = memcpy(xmalloc(bsize), b, bsize);
2084 }
2085
2086 /* Sanity checks on header intro. */
2087 if (hdrblobInit(b, bsize, 0, 0, &hblob, &buf) == RPMRC_OK)
2088 hdrblobImport(&hblob, (flags & HEADERIMPORT_FAST), &h, &buf);
2089
2090 exit:
2091 if (h == NULL && b != blob)
2092 free(b);
2093 free(buf);
2094
2095 return h;
2096 }
2097