2 * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
19 #include <sys/queue.h>
21 #include <sys/socket.h>
22 #include <sys/syslimits.h>
38 #include "got_error.h"
39 #include "got_object.h"
40 #include "got_repository.h"
41 #include "got_opentemp.h"
43 #include "got_lib_sha1.h"
44 #include "got_lib_delta.h"
45 #include "got_lib_privsep.h"
46 #include "got_lib_pack.h"
47 #include "got_lib_inflate.h"
48 #include "got_lib_object.h"
49 #include "got_lib_object_cache.h"
50 #include "got_lib_repository.h"
53 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
56 #define GOT_OBJ_TAG_COMMIT "commit"
57 #define GOT_OBJ_TAG_TREE "tree"
58 #define GOT_OBJ_TAG_BLOB "blob"
59 #define GOT_OBJ_TAG_TAG "tag"
61 #define GOT_COMMIT_TAG_TREE "tree "
62 #define GOT_COMMIT_TAG_PARENT "parent "
63 #define GOT_COMMIT_TAG_AUTHOR "author "
64 #define GOT_COMMIT_TAG_COMMITTER "committer "
66 #define GOT_TAG_TAG_OBJECT "object "
67 #define GOT_TAG_TAG_TYPE "type "
68 #define GOT_TAG_TAG_TAG "tag "
69 #define GOT_TAG_TAG_TAGGER "tagger "
72 got_object_id_cmp(const struct got_object_id *id1,
73 const struct got_object_id *id2)
75 return memcmp(id1->sha1, id2->sha1, SHA1_DIGEST_LENGTH);
78 const struct got_error *
79 got_object_qid_alloc_partial(struct got_object_qid **qid)
81 const struct got_error *err = NULL;
83 *qid = malloc(sizeof(**qid));
85 return got_error_from_errno();
87 (*qid)->id = malloc(sizeof(*((*qid)->id)));
88 if ((*qid)->id == NULL) {
89 err = got_error_from_errno();
90 got_object_qid_free(*qid);
98 const struct got_error *
99 got_object_id_str(char **outbuf, struct got_object_id *id)
101 static const size_t len = SHA1_DIGEST_STRING_LENGTH;
103 *outbuf = malloc(len);
105 return got_error_from_errno();
107 if (got_sha1_digest_to_str(id->sha1, *outbuf, len) == NULL) {
110 return got_error(GOT_ERR_BAD_OBJ_ID_STR);
117 got_object_close(struct got_object *obj)
119 if (obj->refcnt > 0) {
125 if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
126 struct got_delta *delta;
127 while (!SIMPLEQ_EMPTY(&obj->deltas.entries)) {
128 delta = SIMPLEQ_FIRST(&obj->deltas.entries);
129 SIMPLEQ_REMOVE_HEAD(&obj->deltas.entries, entry);
130 got_delta_close(delta);
133 if (obj->flags & GOT_OBJ_FLAG_PACKED)
134 free(obj->path_packfile);
139 got_object_qid_free(struct got_object_qid *qid)
145 struct got_commit_object *
146 got_object_commit_alloc_partial(void)
148 struct got_commit_object *commit;
150 commit = calloc(1, sizeof(*commit));
153 commit->tree_id = malloc(sizeof(*commit->tree_id));
154 if (commit->tree_id == NULL) {
159 SIMPLEQ_INIT(&commit->parent_ids);
164 const struct got_error *
165 got_object_commit_add_parent(struct got_commit_object *commit,
168 const struct got_error *err = NULL;
169 struct got_object_qid *qid;
171 err = got_object_qid_alloc_partial(&qid);
175 if (!got_parse_sha1_digest(qid->id->sha1, id_str)) {
176 err = got_error(GOT_ERR_BAD_OBJ_DATA);
182 SIMPLEQ_INSERT_TAIL(&commit->parent_ids, qid, entry);
188 static const struct got_error *
189 parse_gmtoff(time_t *gmtoff, const char *tzstr)
192 const char *p = tzstr;
200 return got_error(GOT_ERR_BAD_OBJ_DATA);
202 if (!isdigit(*p) && !isdigit(*(p + 1)))
203 return got_error(GOT_ERR_BAD_OBJ_DATA);
204 h = (((*p - '0') * 10) + (*(p + 1) - '0'));
207 if (!isdigit(*p) && !isdigit(*(p + 1)))
208 return got_error(GOT_ERR_BAD_OBJ_DATA);
209 m = ((*p - '0') * 10) + (*(p + 1) - '0');
211 *gmtoff = (h * 60 * 60 + m * 60) * sign;
215 static const struct got_error *
216 parse_commit_time(time_t *time, time_t *gmtoff, char *committer)
218 const struct got_error *err = NULL;
222 /* Parse and strip off trailing timezone indicator string. */
223 space = strrchr(committer, ' ');
225 return got_error(GOT_ERR_BAD_OBJ_DATA);
226 tzstr = strdup(space + 1);
228 return got_error_from_errno();
229 err = parse_gmtoff(gmtoff, tzstr);
235 /* Timestamp is separated from committer name + email by space. */
236 space = strrchr(committer, ' ');
238 return got_error(GOT_ERR_BAD_OBJ_DATA);
240 /* Timestamp parsed here is expressed in comitter's local time. */
241 *time = strtonum(space + 1, 0, INT64_MAX, &errstr);
243 return got_error(GOT_ERR_BAD_OBJ_DATA);
245 /* Express the time stamp in UTC. */
248 /* Strip off parsed time information, leaving just author and email. */
255 got_object_commit_close(struct got_commit_object *commit)
257 struct got_object_qid *qid;
259 if (commit->refcnt > 0) {
261 if (commit->refcnt > 0)
265 while (!SIMPLEQ_EMPTY(&commit->parent_ids)) {
266 qid = SIMPLEQ_FIRST(&commit->parent_ids);
267 SIMPLEQ_REMOVE_HEAD(&commit->parent_ids, entry);
268 got_object_qid_free(qid);
271 free(commit->tree_id);
272 free(commit->author);
273 free(commit->committer);
274 free(commit->logmsg);
278 const struct got_error *
279 got_object_parse_commit(struct got_commit_object **commit, char *buf, size_t len)
281 const struct got_error *err = NULL;
284 ssize_t remain = (ssize_t)len;
286 *commit = got_object_commit_alloc_partial();
288 return got_error_from_errno();
290 tlen = strlen(GOT_COMMIT_TAG_TREE);
291 if (strncmp(s, GOT_COMMIT_TAG_TREE, tlen) == 0) {
293 if (remain < SHA1_DIGEST_STRING_LENGTH) {
294 err = got_error(GOT_ERR_BAD_OBJ_DATA);
298 if (!got_parse_sha1_digest((*commit)->tree_id->sha1, s)) {
299 err = got_error(GOT_ERR_BAD_OBJ_DATA);
302 remain -= SHA1_DIGEST_STRING_LENGTH;
303 s += SHA1_DIGEST_STRING_LENGTH;
305 err = got_error(GOT_ERR_BAD_OBJ_DATA);
309 tlen = strlen(GOT_COMMIT_TAG_PARENT);
310 while (strncmp(s, GOT_COMMIT_TAG_PARENT, tlen) == 0) {
312 if (remain < SHA1_DIGEST_STRING_LENGTH) {
313 err = got_error(GOT_ERR_BAD_OBJ_DATA);
317 err = got_object_commit_add_parent(*commit, s);
321 remain -= SHA1_DIGEST_STRING_LENGTH;
322 s += SHA1_DIGEST_STRING_LENGTH;
325 tlen = strlen(GOT_COMMIT_TAG_AUTHOR);
326 if (strncmp(s, GOT_COMMIT_TAG_AUTHOR, tlen) == 0) {
332 err = got_error(GOT_ERR_BAD_OBJ_DATA);
338 err = got_error(GOT_ERR_BAD_OBJ_DATA);
343 err = parse_commit_time(&(*commit)->author_time,
344 &(*commit)->author_gmtoff, s);
347 (*commit)->author = strdup(s);
348 if ((*commit)->author == NULL) {
349 err = got_error_from_errno();
356 tlen = strlen(GOT_COMMIT_TAG_COMMITTER);
357 if (strncmp(s, GOT_COMMIT_TAG_COMMITTER, tlen) == 0) {
363 err = got_error(GOT_ERR_BAD_OBJ_DATA);
369 err = got_error(GOT_ERR_BAD_OBJ_DATA);
374 err = parse_commit_time(&(*commit)->committer_time,
375 &(*commit)->committer_gmtoff, s);
378 (*commit)->committer = strdup(s);
379 if ((*commit)->committer == NULL) {
380 err = got_error_from_errno();
387 (*commit)->logmsg = strndup(s, remain);
388 if ((*commit)->logmsg == NULL) {
389 err = got_error_from_errno();
394 got_object_commit_close(*commit);
401 got_object_tree_entry_close(struct got_tree_entry *te)
409 got_object_tree_close(struct got_tree_object *tree)
411 struct got_tree_entry *te;
413 if (tree->refcnt > 0) {
415 if (tree->refcnt > 0)
419 while (!SIMPLEQ_EMPTY(&tree->entries.head)) {
420 te = SIMPLEQ_FIRST(&tree->entries.head);
421 SIMPLEQ_REMOVE_HEAD(&tree->entries.head, entry);
422 got_object_tree_entry_close(te);
428 struct got_tree_entry *
429 got_alloc_tree_entry_partial(void)
431 struct got_tree_entry *te;
433 te = malloc(sizeof(*te));
437 te->id = malloc(sizeof(*te->id));
438 if (te->id == NULL) {
445 static const struct got_error *
446 parse_tree_entry(struct got_tree_entry **te, size_t *elen, char *buf,
449 char *p = buf, *space;
450 const struct got_error *err = NULL;
452 *te = got_alloc_tree_entry_partial();
454 return got_error_from_errno();
456 *elen = strlen(buf) + 1;
457 if (*elen > maxlen) {
460 return got_error(GOT_ERR_BAD_OBJ_DATA);
463 space = strchr(buf, ' ');
465 err = got_error(GOT_ERR_BAD_OBJ_DATA);
472 if (*p < '0' && *p > '7') {
473 err = got_error(GOT_ERR_BAD_OBJ_DATA);
477 (*te)->mode |= *p - '0';
481 (*te)->name = strdup(space + 1);
482 if (*elen > maxlen || maxlen - *elen < SHA1_DIGEST_LENGTH) {
483 err = got_error(GOT_ERR_BAD_OBJ_DATA);
487 memcpy((*te)->id->sha1, buf, SHA1_DIGEST_LENGTH);
488 *elen += SHA1_DIGEST_LENGTH;
491 got_object_tree_entry_close(*te);
497 const struct got_error *
498 got_object_parse_tree(struct got_tree_object **tree, uint8_t *buf, size_t len)
500 const struct got_error *err;
503 *tree = calloc(1, sizeof(**tree));
505 return got_error_from_errno();
507 SIMPLEQ_INIT(&(*tree)->entries.head);
510 struct got_tree_entry *te;
513 err = parse_tree_entry(&te, &elen, buf, remain);
516 (*tree)->entries.nentries++;
517 SIMPLEQ_INSERT_TAIL(&(*tree)->entries.head, te, entry);
523 got_object_tree_close(*tree);
525 return got_error(GOT_ERR_BAD_OBJ_DATA);
532 got_object_tag_close(struct got_tag_object *tag)
540 const struct got_error *
541 got_object_parse_tag(struct got_tag_object **tag, uint8_t *buf, size_t len)
543 const struct got_error *err = NULL;
548 *tag = calloc(1, sizeof(**tag));
550 return got_error_from_errno();
552 tlen = strlen(GOT_TAG_TAG_OBJECT);
553 if (strncmp(s, GOT_TAG_TAG_OBJECT, tlen) == 0) {
555 if (remain < SHA1_DIGEST_STRING_LENGTH) {
556 err = got_error(GOT_ERR_BAD_OBJ_DATA);
560 if (!got_parse_sha1_digest((*tag)->id.sha1, s)) {
561 err = got_error(GOT_ERR_BAD_OBJ_DATA);
564 remain -= SHA1_DIGEST_STRING_LENGTH;
565 s += SHA1_DIGEST_STRING_LENGTH;
567 err = got_error(GOT_ERR_BAD_OBJ_DATA);
572 err = got_error(GOT_ERR_BAD_OBJ_DATA);
576 tlen = strlen(GOT_TAG_TAG_TYPE);
577 if (strncmp(s, GOT_TAG_TAG_TYPE, tlen) == 0) {
580 err = got_error(GOT_ERR_BAD_OBJ_DATA);
584 if (strncmp(s, GOT_OBJ_TAG_COMMIT,
585 strlen(GOT_OBJ_TAG_COMMIT)) == 0) {
586 (*tag)->obj_type = GOT_OBJ_TYPE_COMMIT;
587 tlen = strlen(GOT_OBJ_TAG_COMMIT);
590 } else if (strncmp(s, GOT_OBJ_TAG_TREE,
591 strlen(GOT_OBJ_TAG_TREE)) == 0) {
592 (*tag)->obj_type = GOT_OBJ_TYPE_TREE;
593 tlen = strlen(GOT_OBJ_TAG_TREE);
596 } else if (strncmp(s, GOT_OBJ_TAG_BLOB,
597 strlen(GOT_OBJ_TAG_BLOB)) == 0) {
598 (*tag)->obj_type = GOT_OBJ_TYPE_BLOB;
599 tlen = strlen(GOT_OBJ_TAG_BLOB);
602 } else if (strncmp(s, GOT_OBJ_TAG_TAG,
603 strlen(GOT_OBJ_TAG_TAG)) == 0) {
604 (*tag)->obj_type = GOT_OBJ_TYPE_TAG;
605 tlen = strlen(GOT_OBJ_TAG_TAG);
609 err = got_error(GOT_ERR_BAD_OBJ_DATA);
613 if (remain <= 0 || *s != '\n') {
614 err = got_error(GOT_ERR_BAD_OBJ_DATA);
620 err = got_error(GOT_ERR_BAD_OBJ_DATA);
624 err = got_error(GOT_ERR_BAD_OBJ_DATA);
628 tlen = strlen(GOT_TAG_TAG_TAG);
629 if (strncmp(s, GOT_TAG_TAG_TAG, tlen) == 0) {
634 err = got_error(GOT_ERR_BAD_OBJ_DATA);
640 err = got_error(GOT_ERR_BAD_OBJ_DATA);
645 (*tag)->tag = strndup(s, slen);
646 if ((*tag)->tag == NULL) {
647 err = got_error_from_errno();
653 err = got_error(GOT_ERR_BAD_OBJ_DATA);
657 err = got_error(GOT_ERR_BAD_OBJ_DATA);
661 tlen = strlen(GOT_TAG_TAG_TAGGER);
662 if (strncmp(s, GOT_TAG_TAG_TAGGER, tlen) == 0) {
668 err = got_error(GOT_ERR_BAD_OBJ_DATA);
674 err = got_error(GOT_ERR_BAD_OBJ_DATA);
679 err = parse_commit_time(&(*tag)->tagger_time,
680 &(*tag)->tagger_gmtoff, s);
683 (*tag)->tagger = strdup(s);
684 if ((*tag)->tagger == NULL) {
685 err = got_error_from_errno();
691 err = got_error(GOT_ERR_BAD_OBJ_DATA);
695 err = got_error(GOT_ERR_BAD_OBJ_DATA);
699 (*tag)->tagmsg = strndup(s, remain);
700 if ((*tag)->tagmsg == NULL) {
701 err = got_error_from_errno();
706 got_object_tag_close(*tag);
712 const struct got_error *
713 got_read_file_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
715 const struct got_error *err = NULL;
716 static const size_t blocksize = 512;
717 size_t n, total, remain;
723 buf = malloc(blocksize);
725 return got_error_from_errno();
732 newbuf = reallocarray(buf, 1, total + blocksize);
733 if (newbuf == NULL) {
734 err = got_error_from_errno();
740 n = fread(buf + total, 1, remain, f);
743 err = got_ferror(f, GOT_ERR_IO);