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1 | #include "cache.h" | |
2 | #include "tag.h" | |
3 | #include "object-store.h" | |
4 | #include "commit.h" | |
5 | #include "tree.h" | |
6 | #include "blob.h" | |
7 | #include "alloc.h" | |
8 | #include "gpg-interface.h" | |
9 | #include "packfile.h" | |
10 | ||
11 | const char *tag_type = "tag"; | |
12 | ||
13 | static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags) | |
14 | { | |
15 | struct signature_check sigc; | |
16 | size_t payload_size; | |
17 | int ret; | |
18 | ||
19 | memset(&sigc, 0, sizeof(sigc)); | |
20 | ||
21 | payload_size = parse_signature(buf, size); | |
22 | ||
23 | if (size == payload_size) { | |
24 | if (flags & GPG_VERIFY_VERBOSE) | |
25 | write_in_full(1, buf, payload_size); | |
26 | return error("no signature found"); | |
27 | } | |
28 | ||
29 | ret = check_signature(buf, payload_size, buf + payload_size, | |
30 | size - payload_size, &sigc); | |
31 | ||
32 | if (!(flags & GPG_VERIFY_OMIT_STATUS)) | |
33 | print_signature_buffer(&sigc, flags); | |
34 | ||
35 | signature_check_clear(&sigc); | |
36 | return ret; | |
37 | } | |
38 | ||
39 | int gpg_verify_tag(const struct object_id *oid, const char *name_to_report, | |
40 | unsigned flags) | |
41 | { | |
42 | enum object_type type; | |
43 | char *buf; | |
44 | unsigned long size; | |
45 | int ret; | |
46 | ||
47 | type = oid_object_info(the_repository, oid, NULL); | |
48 | if (type != OBJ_TAG) | |
49 | return error("%s: cannot verify a non-tag object of type %s.", | |
50 | name_to_report ? | |
51 | name_to_report : | |
52 | find_unique_abbrev(oid, DEFAULT_ABBREV), | |
53 | type_name(type)); | |
54 | ||
55 | buf = read_object_file(oid, &type, &size); | |
56 | if (!buf) | |
57 | return error("%s: unable to read file.", | |
58 | name_to_report ? | |
59 | name_to_report : | |
60 | find_unique_abbrev(oid, DEFAULT_ABBREV)); | |
61 | ||
62 | ret = run_gpg_verify(buf, size, flags); | |
63 | ||
64 | free(buf); | |
65 | return ret; | |
66 | } | |
67 | ||
68 | struct object *deref_tag(struct repository *r, struct object *o, const char *warn, int warnlen) | |
69 | { | |
70 | struct object_id *last_oid = NULL; | |
71 | while (o && o->type == OBJ_TAG) | |
72 | if (((struct tag *)o)->tagged) { | |
73 | last_oid = &((struct tag *)o)->tagged->oid; | |
74 | o = parse_object(r, last_oid); | |
75 | } else { | |
76 | last_oid = NULL; | |
77 | o = NULL; | |
78 | } | |
79 | if (!o && warn) { | |
80 | if (last_oid && is_promisor_object(last_oid)) | |
81 | return NULL; | |
82 | if (!warnlen) | |
83 | warnlen = strlen(warn); | |
84 | error("missing object referenced by '%.*s'", warnlen, warn); | |
85 | } | |
86 | return o; | |
87 | } | |
88 | ||
89 | struct object *deref_tag_noverify(struct object *o) | |
90 | { | |
91 | while (o && o->type == OBJ_TAG) { | |
92 | o = parse_object(the_repository, &o->oid); | |
93 | if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged) | |
94 | o = ((struct tag *)o)->tagged; | |
95 | else | |
96 | o = NULL; | |
97 | } | |
98 | return o; | |
99 | } | |
100 | ||
101 | struct tag *lookup_tag(struct repository *r, const struct object_id *oid) | |
102 | { | |
103 | struct object *obj = lookup_object(r, oid->hash); | |
104 | if (!obj) | |
105 | return create_object(r, oid->hash, | |
106 | alloc_tag_node(r)); | |
107 | return object_as_type(r, obj, OBJ_TAG, 0); | |
108 | } | |
109 | ||
110 | static timestamp_t parse_tag_date(const char *buf, const char *tail) | |
111 | { | |
112 | const char *dateptr; | |
113 | ||
114 | while (buf < tail && *buf++ != '>') | |
115 | /* nada */; | |
116 | if (buf >= tail) | |
117 | return 0; | |
118 | dateptr = buf; | |
119 | while (buf < tail && *buf++ != '\n') | |
120 | /* nada */; | |
121 | if (buf >= tail) | |
122 | return 0; | |
123 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ | |
124 | return parse_timestamp(dateptr, NULL, 10); | |
125 | } | |
126 | ||
127 | void release_tag_memory(struct tag *t) | |
128 | { | |
129 | free(t->tag); | |
130 | t->tagged = NULL; | |
131 | t->object.parsed = 0; | |
132 | t->date = 0; | |
133 | } | |
134 | ||
135 | int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size) | |
136 | { | |
137 | struct object_id oid; | |
138 | char type[20]; | |
139 | const char *bufptr = data; | |
140 | const char *tail = bufptr + size; | |
141 | const char *nl; | |
142 | ||
143 | if (item->object.parsed) | |
144 | return 0; | |
145 | item->object.parsed = 1; | |
146 | ||
147 | if (size < the_hash_algo->hexsz + 24) | |
148 | return -1; | |
149 | if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n') | |
150 | return -1; | |
151 | ||
152 | if (!starts_with(bufptr, "type ")) | |
153 | return -1; | |
154 | bufptr += 5; | |
155 | nl = memchr(bufptr, '\n', tail - bufptr); | |
156 | if (!nl || sizeof(type) <= (nl - bufptr)) | |
157 | return -1; | |
158 | memcpy(type, bufptr, nl - bufptr); | |
159 | type[nl - bufptr] = '\0'; | |
160 | bufptr = nl + 1; | |
161 | ||
162 | if (!strcmp(type, blob_type)) { | |
163 | item->tagged = (struct object *)lookup_blob(r, &oid); | |
164 | } else if (!strcmp(type, tree_type)) { | |
165 | item->tagged = (struct object *)lookup_tree(r, &oid); | |
166 | } else if (!strcmp(type, commit_type)) { | |
167 | item->tagged = (struct object *)lookup_commit(r, &oid); | |
168 | } else if (!strcmp(type, tag_type)) { | |
169 | item->tagged = (struct object *)lookup_tag(r, &oid); | |
170 | } else { | |
171 | error("Unknown type %s", type); | |
172 | item->tagged = NULL; | |
173 | } | |
174 | ||
175 | if (bufptr + 4 < tail && starts_with(bufptr, "tag ")) | |
176 | ; /* good */ | |
177 | else | |
178 | return -1; | |
179 | bufptr += 4; | |
180 | nl = memchr(bufptr, '\n', tail - bufptr); | |
181 | if (!nl) | |
182 | return -1; | |
183 | item->tag = xmemdupz(bufptr, nl - bufptr); | |
184 | bufptr = nl + 1; | |
185 | ||
186 | if (bufptr + 7 < tail && starts_with(bufptr, "tagger ")) | |
187 | item->date = parse_tag_date(bufptr, tail); | |
188 | else | |
189 | item->date = 0; | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | int parse_tag(struct tag *item) | |
195 | { | |
196 | enum object_type type; | |
197 | void *data; | |
198 | unsigned long size; | |
199 | int ret; | |
200 | ||
201 | if (item->object.parsed) | |
202 | return 0; | |
203 | data = read_object_file(&item->object.oid, &type, &size); | |
204 | if (!data) | |
205 | return error("Could not read %s", | |
206 | oid_to_hex(&item->object.oid)); | |
207 | if (type != OBJ_TAG) { | |
208 | free(data); | |
209 | return error("Object %s not a tag", | |
210 | oid_to_hex(&item->object.oid)); | |
211 | } | |
212 | ret = parse_tag_buffer(the_repository, item, data, size); | |
213 | free(data); | |
214 | return ret; | |
215 | } |