| #include "git-compat-util.h" |
| #include "environment.h" |
| #include "tag.h" |
| #include "object-name.h" |
| #include "object-store-ll.h" |
| #include "commit.h" |
| #include "tree.h" |
| #include "blob.h" |
| #include "alloc.h" |
| #include "gpg-interface.h" |
| #include "hex.h" |
| #include "packfile.h" |
| |
| const char *tag_type = "tag"; |
| |
| static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags) |
| { |
| struct signature_check sigc; |
| struct strbuf payload = STRBUF_INIT; |
| struct strbuf signature = STRBUF_INIT; |
| int ret; |
| |
| memset(&sigc, 0, sizeof(sigc)); |
| |
| if (!parse_signature(buf, size, &payload, &signature)) { |
| if (flags & GPG_VERIFY_VERBOSE) |
| write_in_full(1, buf, size); |
| return error("no signature found"); |
| } |
| |
| sigc.payload_type = SIGNATURE_PAYLOAD_TAG; |
| sigc.payload = strbuf_detach(&payload, &sigc.payload_len); |
| ret = check_signature(&sigc, signature.buf, signature.len); |
| |
| if (!(flags & GPG_VERIFY_OMIT_STATUS)) |
| print_signature_buffer(&sigc, flags); |
| |
| signature_check_clear(&sigc); |
| strbuf_release(&payload); |
| strbuf_release(&signature); |
| return ret; |
| } |
| |
| int gpg_verify_tag(const struct object_id *oid, const char *name_to_report, |
| unsigned flags) |
| { |
| enum object_type type; |
| char *buf; |
| unsigned long size; |
| int ret; |
| |
| type = oid_object_info(the_repository, oid, NULL); |
| if (type != OBJ_TAG) |
| return error("%s: cannot verify a non-tag object of type %s.", |
| name_to_report ? |
| name_to_report : |
| repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV), |
| type_name(type)); |
| |
| buf = repo_read_object_file(the_repository, oid, &type, &size); |
| if (!buf) |
| return error("%s: unable to read file.", |
| name_to_report ? |
| name_to_report : |
| repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV)); |
| |
| ret = run_gpg_verify(buf, size, flags); |
| |
| free(buf); |
| return ret; |
| } |
| |
| struct object *deref_tag(struct repository *r, struct object *o, const char *warn, int warnlen) |
| { |
| struct object_id *last_oid = NULL; |
| while (o && o->type == OBJ_TAG) |
| if (((struct tag *)o)->tagged) { |
| last_oid = &((struct tag *)o)->tagged->oid; |
| o = parse_object(r, last_oid); |
| } else { |
| last_oid = NULL; |
| o = NULL; |
| } |
| if (!o && warn) { |
| if (last_oid && is_promisor_object(last_oid)) |
| return NULL; |
| if (!warnlen) |
| warnlen = strlen(warn); |
| error("missing object referenced by '%.*s'", warnlen, warn); |
| } |
| return o; |
| } |
| |
| struct object *deref_tag_noverify(struct repository *r, struct object *o) |
| { |
| while (o && o->type == OBJ_TAG) { |
| o = parse_object(r, &o->oid); |
| if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged) |
| o = ((struct tag *)o)->tagged; |
| else |
| o = NULL; |
| } |
| return o; |
| } |
| |
| struct tag *lookup_tag(struct repository *r, const struct object_id *oid) |
| { |
| struct object *obj = lookup_object(r, oid); |
| if (!obj) |
| return create_object(r, oid, alloc_tag_node(r)); |
| return object_as_type(obj, OBJ_TAG, 0); |
| } |
| |
| static timestamp_t parse_tag_date(const char *buf, const char *tail) |
| { |
| const char *dateptr; |
| |
| while (buf < tail && *buf++ != '>') |
| /* nada */; |
| if (buf >= tail) |
| return 0; |
| dateptr = buf; |
| while (buf < tail && *buf++ != '\n') |
| /* nada */; |
| if (buf >= tail) |
| return 0; |
| /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ |
| return parse_timestamp(dateptr, NULL, 10); |
| } |
| |
| void release_tag_memory(struct tag *t) |
| { |
| free(t->tag); |
| t->tagged = NULL; |
| t->object.parsed = 0; |
| t->date = 0; |
| } |
| |
| int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size) |
| { |
| struct object_id oid; |
| char type[20]; |
| const char *bufptr = data; |
| const char *tail = bufptr + size; |
| const char *nl; |
| |
| if (item->object.parsed) |
| return 0; |
| |
| if (item->tag) { |
| /* |
| * Presumably left over from a previous failed parse; |
| * clear it out in preparation for re-parsing (we'll probably |
| * hit the same error, which lets us tell our current caller |
| * about the problem). |
| */ |
| FREE_AND_NULL(item->tag); |
| } |
| |
| if (size < the_hash_algo->hexsz + 24) |
| return -1; |
| if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n') |
| return -1; |
| |
| if (!starts_with(bufptr, "type ")) |
| return -1; |
| bufptr += 5; |
| nl = memchr(bufptr, '\n', tail - bufptr); |
| if (!nl || sizeof(type) <= (nl - bufptr)) |
| return -1; |
| memcpy(type, bufptr, nl - bufptr); |
| type[nl - bufptr] = '\0'; |
| bufptr = nl + 1; |
| |
| if (!strcmp(type, blob_type)) { |
| item->tagged = (struct object *)lookup_blob(r, &oid); |
| } else if (!strcmp(type, tree_type)) { |
| item->tagged = (struct object *)lookup_tree(r, &oid); |
| } else if (!strcmp(type, commit_type)) { |
| item->tagged = (struct object *)lookup_commit(r, &oid); |
| } else if (!strcmp(type, tag_type)) { |
| item->tagged = (struct object *)lookup_tag(r, &oid); |
| } else { |
| return error("unknown tag type '%s' in %s", |
| type, oid_to_hex(&item->object.oid)); |
| } |
| |
| if (!item->tagged) |
| return error("bad tag pointer to %s in %s", |
| oid_to_hex(&oid), |
| oid_to_hex(&item->object.oid)); |
| |
| if (bufptr + 4 < tail && starts_with(bufptr, "tag ")) |
| ; /* good */ |
| else |
| return -1; |
| bufptr += 4; |
| nl = memchr(bufptr, '\n', tail - bufptr); |
| if (!nl) |
| return -1; |
| item->tag = xmemdupz(bufptr, nl - bufptr); |
| bufptr = nl + 1; |
| |
| if (bufptr + 7 < tail && starts_with(bufptr, "tagger ")) |
| item->date = parse_tag_date(bufptr, tail); |
| else |
| item->date = 0; |
| |
| item->object.parsed = 1; |
| return 0; |
| } |
| |
| int parse_tag(struct tag *item) |
| { |
| enum object_type type; |
| void *data; |
| unsigned long size; |
| int ret; |
| |
| if (item->object.parsed) |
| return 0; |
| data = repo_read_object_file(the_repository, &item->object.oid, &type, |
| &size); |
| if (!data) |
| return error("Could not read %s", |
| oid_to_hex(&item->object.oid)); |
| if (type != OBJ_TAG) { |
| free(data); |
| return error("Object %s not a tag", |
| oid_to_hex(&item->object.oid)); |
| } |
| ret = parse_tag_buffer(the_repository, item, data, size); |
| free(data); |
| return ret; |
| } |
| |
| struct object_id *get_tagged_oid(struct tag *tag) |
| { |
| if (!tag->tagged) |
| die("bad tag"); |
| return &tag->tagged->oid; |
| } |