object: convert parse_object* to take struct object_id
[git/git.git] / tag.c
CommitLineData
2636f614 1#include "cache.h"
8f1d2e6f 2#include "tag.h"
0ab17950
NP
3#include "commit.h"
4#include "tree.h"
5#include "blob.h"
94240b91 6#include "gpg-interface.h"
2636f614
DB
7
8const char *tag_type = "tag";
9
45a227ef
ST
10static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
11{
12 struct signature_check sigc;
13 size_t payload_size;
14 int ret;
15
16 memset(&sigc, 0, sizeof(sigc));
17
18 payload_size = parse_signature(buf, size);
19
20 if (size == payload_size) {
21 if (flags & GPG_VERIFY_VERBOSE)
22 write_in_full(1, buf, payload_size);
23 return error("no signature found");
24 }
25
26 ret = check_signature(buf, payload_size, buf + payload_size,
27 size - payload_size, &sigc);
94240b91
LP
28
29 if (!(flags & GPG_VERIFY_OMIT_STATUS))
30 print_signature_buffer(&sigc, flags);
45a227ef
ST
31
32 signature_check_clear(&sigc);
33 return ret;
34}
35
36int gpg_verify_tag(const unsigned char *sha1, const char *name_to_report,
37 unsigned flags)
38{
39 enum object_type type;
40 char *buf;
41 unsigned long size;
42 int ret;
43
44 type = sha1_object_info(sha1, NULL);
45 if (type != OBJ_TAG)
46 return error("%s: cannot verify a non-tag object of type %s.",
47 name_to_report ?
48 name_to_report :
49 find_unique_abbrev(sha1, DEFAULT_ABBREV),
50 typename(type));
51
52 buf = read_sha1_file(sha1, &type, &size);
53 if (!buf)
54 return error("%s: unable to read file.",
55 name_to_report ?
56 name_to_report :
57 find_unique_abbrev(sha1, DEFAULT_ABBREV));
58
59 ret = run_gpg_verify(buf, size, flags);
60
61 free(buf);
62 return ret;
63}
64
9534f40b 65struct object *deref_tag(struct object *o, const char *warn, int warnlen)
37fde874 66{
1974632c 67 while (o && o->type == OBJ_TAG)
24e8a3c9 68 if (((struct tag *)o)->tagged)
c251c83d 69 o = parse_object(&((struct tag *)o)->tagged->oid);
24e8a3c9
MK
70 else
71 o = NULL;
9534f40b
JH
72 if (!o && warn) {
73 if (!warnlen)
74 warnlen = strlen(warn);
75 error("missing object referenced by '%.*s'", warnlen, warn);
76 }
37fde874
JH
77 return o;
78}
79
90108a24
JK
80struct object *deref_tag_noverify(struct object *o)
81{
82 while (o && o->type == OBJ_TAG) {
c251c83d 83 o = parse_object(&o->oid);
90108a24
JK
84 if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
85 o = ((struct tag *)o)->tagged;
86 else
87 o = NULL;
88 }
89 return o;
90}
91
d3101b53 92struct tag *lookup_tag(const struct object_id *oid)
2636f614 93{
d3101b53 94 struct object *obj = lookup_object(oid->hash);
100c5f3b 95 if (!obj)
d3101b53 96 return create_object(oid->hash, alloc_tag_node());
8ff226a9 97 return object_as_type(obj, OBJ_TAG, 0);
2636f614
DB
98}
99
e451d06b
SP
100static unsigned long parse_tag_date(const char *buf, const char *tail)
101{
102 const char *dateptr;
103
104 while (buf < tail && *buf++ != '>')
105 /* nada */;
106 if (buf >= tail)
107 return 0;
108 dateptr = buf;
109 while (buf < tail && *buf++ != '\n')
110 /* nada */;
111 if (buf >= tail)
112 return 0;
113 /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */
114 return strtoul(dateptr, NULL, 10);
115}
116
cf7b1cad 117int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
2636f614 118{
1e4085a0 119 struct object_id oid;
89e4202f 120 char type[20];
28de5b6b
SP
121 const char *bufptr = data;
122 const char *tail = bufptr + size;
123 const char *nl;
ae200ee5 124
2e0052a5
SP
125 if (item->object.parsed)
126 return 0;
127 item->object.parsed = 1;
2636f614 128
1e4085a0 129 if (size < GIT_SHA1_HEXSZ + 24)
bd2c39f5 130 return -1;
1e4085a0 131 if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n')
bd2c39f5 132 return -1;
2636f614 133
59556548 134 if (!starts_with(bufptr, "type "))
bd2c39f5 135 return -1;
28de5b6b
SP
136 bufptr += 5;
137 nl = memchr(bufptr, '\n', tail - bufptr);
138 if (!nl || sizeof(type) <= (nl - bufptr))
bd2c39f5 139 return -1;
eddda371 140 memcpy(type, bufptr, nl - bufptr);
28de5b6b
SP
141 type[nl - bufptr] = '\0';
142 bufptr = nl + 1;
2636f614 143
0ab17950 144 if (!strcmp(type, blob_type)) {
3aca1fc6 145 item->tagged = &lookup_blob(&oid)->object;
0ab17950 146 } else if (!strcmp(type, tree_type)) {
740ee055 147 item->tagged = &lookup_tree(&oid)->object;
0ab17950 148 } else if (!strcmp(type, commit_type)) {
bc83266a 149 item->tagged = &lookup_commit(&oid)->object;
0ab17950 150 } else if (!strcmp(type, tag_type)) {
d3101b53 151 item->tagged = &lookup_tag(&oid)->object;
0ab17950
NP
152 } else {
153 error("Unknown type %s", type);
154 item->tagged = NULL;
155 }
156
59556548 157 if (bufptr + 4 < tail && starts_with(bufptr, "tag "))
85594252
NTND
158 ; /* good */
159 else
28de5b6b
SP
160 return -1;
161 bufptr += 4;
162 nl = memchr(bufptr, '\n', tail - bufptr);
163 if (!nl)
164 return -1;
165 item->tag = xmemdupz(bufptr, nl - bufptr);
166 bufptr = nl + 1;
167
59556548 168 if (bufptr + 7 < tail && starts_with(bufptr, "tagger "))
e451d06b
SP
169 item->date = parse_tag_date(bufptr, tail);
170 else
171 item->date = 0;
172
2636f614 173 return 0;
bd2c39f5 174}
13019d41 175
bd2c39f5
NP
176int parse_tag(struct tag *item)
177{
21666f1a 178 enum object_type type;
bd2c39f5
NP
179 void *data;
180 unsigned long size;
181 int ret;
182
183 if (item->object.parsed)
184 return 0;
ed1c9977 185 data = read_sha1_file(item->object.oid.hash, &type, &size);
bd2c39f5
NP
186 if (!data)
187 return error("Could not read %s",
f2fd0760 188 oid_to_hex(&item->object.oid));
21666f1a 189 if (type != OBJ_TAG) {
bd2c39f5
NP
190 free(data);
191 return error("Object %s not a tag",
f2fd0760 192 oid_to_hex(&item->object.oid));
bd2c39f5
NP
193 }
194 ret = parse_tag_buffer(item, data, size);
13019d41 195 free(data);
bd2c39f5 196 return ret;
2636f614 197}