freshlybakedca.ke
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1#define USE_THE_REPOSITORY_VARIABLE
2#define DISABLE_SIGN_COMPARE_WARNINGS
3
4#include "git-compat-util.h"
5#include "environment.h"
6#include "tag.h"
7#include "object-name.h"
8#include "odb.h"
9#include "commit.h"
10#include "tree.h"
11#include "blob.h"
12#include "alloc.h"
13#include "gpg-interface.h"
14#include "hex.h"
15#include "packfile.h"
16
17const char *tag_type = "tag";
18
19static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
20{
21 struct signature_check sigc;
22 struct strbuf payload = STRBUF_INIT;
23 struct strbuf signature = STRBUF_INIT;
24 int ret;
25
26 memset(&sigc, 0, sizeof(sigc));
27
28 if (!parse_signature(buf, size, &payload, &signature)) {
29 if (flags & GPG_VERIFY_VERBOSE)
30 write_in_full(1, buf, size);
31 return error("no signature found");
32 }
33
34 sigc.payload_type = SIGNATURE_PAYLOAD_TAG;
35 sigc.payload = strbuf_detach(&payload, &sigc.payload_len);
36 ret = check_signature(&sigc, signature.buf, signature.len);
37
38 if (!(flags & GPG_VERIFY_OMIT_STATUS))
39 print_signature_buffer(&sigc, flags);
40
41 signature_check_clear(&sigc);
42 strbuf_release(&payload);
43 strbuf_release(&signature);
44 return ret;
45}
46
47int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
48 unsigned flags)
49{
50 enum object_type type;
51 char *buf;
52 unsigned long size;
53 int ret;
54
55 type = odb_read_object_info(the_repository->objects, oid, NULL);
56 if (type != OBJ_TAG)
57 return error("%s: cannot verify a non-tag object of type %s.",
58 name_to_report ?
59 name_to_report :
60 repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV),
61 type_name(type));
62
63 buf = odb_read_object(the_repository->objects, oid, &type, &size);
64 if (!buf)
65 return error("%s: unable to read file.",
66 name_to_report ?
67 name_to_report :
68 repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV));
69
70 ret = run_gpg_verify(buf, size, flags);
71
72 free(buf);
73 return ret;
74}
75
76struct object *deref_tag(struct repository *r, struct object *o, const char *warn, int warnlen)
77{
78 struct object_id *last_oid = NULL;
79 while (o && o->type == OBJ_TAG)
80 if (((struct tag *)o)->tagged) {
81 last_oid = &((struct tag *)o)->tagged->oid;
82 o = parse_object(r, last_oid);
83 } else {
84 last_oid = NULL;
85 o = NULL;
86 }
87 if (!o && warn) {
88 if (last_oid && is_promisor_object(r, last_oid))
89 return NULL;
90 if (!warnlen)
91 warnlen = strlen(warn);
92 error("missing object referenced by '%.*s'", warnlen, warn);
93 }
94 return o;
95}
96
97struct object *deref_tag_noverify(struct repository *r, struct object *o)
98{
99 while (o && o->type == OBJ_TAG) {
100 o = parse_object(r, &o->oid);
101 if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
102 o = ((struct tag *)o)->tagged;
103 else
104 o = NULL;
105 }
106 return o;
107}
108
109struct tag *lookup_tag(struct repository *r, const struct object_id *oid)
110{
111 struct object *obj = lookup_object(r, oid);
112 if (!obj)
113 return create_object(r, oid, alloc_tag_node(r));
114 return object_as_type(obj, OBJ_TAG, 0);
115}
116
117static timestamp_t parse_tag_date(const char *buf, const char *tail)
118{
119 const char *dateptr;
120
121 while (buf < tail && *buf++ != '>')
122 /* nada */;
123 if (buf >= tail)
124 return 0;
125 dateptr = buf;
126 while (buf < tail && *buf++ != '\n')
127 /* nada */;
128 if (buf >= tail)
129 return 0;
130 /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */
131 return parse_timestamp(dateptr, NULL, 10);
132}
133
134void release_tag_memory(struct tag *t)
135{
136 free(t->tag);
137 t->tagged = NULL;
138 t->object.parsed = 0;
139 t->date = 0;
140}
141
142int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size)
143{
144 struct object_id oid;
145 char type[20];
146 const char *bufptr = data;
147 const char *tail = bufptr + size;
148 const char *nl;
149
150 if (item->object.parsed)
151 return 0;
152
153 if (item->tag) {
154 /*
155 * Presumably left over from a previous failed parse;
156 * clear it out in preparation for re-parsing (we'll probably
157 * hit the same error, which lets us tell our current caller
158 * about the problem).
159 */
160 FREE_AND_NULL(item->tag);
161 }
162
163 if (size < the_hash_algo->hexsz + 24)
164 return -1;
165 if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n')
166 return -1;
167
168 if (!starts_with(bufptr, "type "))
169 return -1;
170 bufptr += 5;
171 nl = memchr(bufptr, '\n', tail - bufptr);
172 if (!nl || sizeof(type) <= (nl - bufptr))
173 return -1;
174 memcpy(type, bufptr, nl - bufptr);
175 type[nl - bufptr] = '\0';
176 bufptr = nl + 1;
177
178 if (!strcmp(type, blob_type)) {
179 item->tagged = (struct object *)lookup_blob(r, &oid);
180 } else if (!strcmp(type, tree_type)) {
181 item->tagged = (struct object *)lookup_tree(r, &oid);
182 } else if (!strcmp(type, commit_type)) {
183 item->tagged = (struct object *)lookup_commit(r, &oid);
184 } else if (!strcmp(type, tag_type)) {
185 item->tagged = (struct object *)lookup_tag(r, &oid);
186 } else {
187 return error("unknown tag type '%s' in %s",
188 type, oid_to_hex(&item->object.oid));
189 }
190
191 if (!item->tagged)
192 return error("bad tag pointer to %s in %s",
193 oid_to_hex(&oid),
194 oid_to_hex(&item->object.oid));
195
196 if (bufptr + 4 < tail && starts_with(bufptr, "tag "))
197 ; /* good */
198 else
199 return -1;
200 bufptr += 4;
201 nl = memchr(bufptr, '\n', tail - bufptr);
202 if (!nl)
203 return -1;
204 item->tag = xmemdupz(bufptr, nl - bufptr);
205 bufptr = nl + 1;
206
207 if (bufptr + 7 < tail && starts_with(bufptr, "tagger "))
208 item->date = parse_tag_date(bufptr, tail);
209 else
210 item->date = 0;
211
212 item->object.parsed = 1;
213 return 0;
214}
215
216int parse_tag(struct tag *item)
217{
218 enum object_type type;
219 void *data;
220 unsigned long size;
221 int ret;
222
223 if (item->object.parsed)
224 return 0;
225 data = odb_read_object(the_repository->objects, &item->object.oid,
226 &type, &size);
227 if (!data)
228 return error("Could not read %s",
229 oid_to_hex(&item->object.oid));
230 if (type != OBJ_TAG) {
231 free(data);
232 return error("Object %s not a tag",
233 oid_to_hex(&item->object.oid));
234 }
235 ret = parse_tag_buffer(the_repository, item, data, size);
236 free(data);
237 return ret;
238}
239
240struct object_id *get_tagged_oid(struct tag *tag)
241{
242 if (!tag->tagged)
243 die("bad tag");
244 return &tag->tagged->oid;
245}