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1 | #include "cache.h" | |
2 | #include "tag.h" | |
3 | #include "commit.h" | |
4 | #include "tree.h" | |
5 | #include "blob.h" | |
6 | #include "gpg-interface.h" | |
7 | ||
8 | const char *tag_type = "tag"; | |
9 | ||
10 | static 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); | |
28 | ||
29 | if (!(flags & GPG_VERIFY_OMIT_STATUS)) | |
30 | print_signature_buffer(&sigc, flags); | |
31 | ||
32 | signature_check_clear(&sigc); | |
33 | return ret; | |
34 | } | |
35 | ||
36 | int 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 | ||
65 | struct object *deref_tag(struct object *o, const char *warn, int warnlen) | |
66 | { | |
67 | while (o && o->type == OBJ_TAG) | |
68 | if (((struct tag *)o)->tagged) | |
69 | o = parse_object(&((struct tag *)o)->tagged->oid); | |
70 | else | |
71 | o = NULL; | |
72 | if (!o && warn) { | |
73 | if (!warnlen) | |
74 | warnlen = strlen(warn); | |
75 | error("missing object referenced by '%.*s'", warnlen, warn); | |
76 | } | |
77 | return o; | |
78 | } | |
79 | ||
80 | struct object *deref_tag_noverify(struct object *o) | |
81 | { | |
82 | while (o && o->type == OBJ_TAG) { | |
83 | o = parse_object(&o->oid); | |
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 | ||
92 | struct tag *lookup_tag(const struct object_id *oid) | |
93 | { | |
94 | struct object *obj = lookup_object(oid->hash); | |
95 | if (!obj) | |
96 | return create_object(oid->hash, alloc_tag_node()); | |
97 | return object_as_type(obj, OBJ_TAG, 0); | |
98 | } | |
99 | ||
100 | static timestamp_t 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 parsing will stop at buf-1 */ | |
114 | return parse_timestamp(dateptr, NULL, 10); | |
115 | } | |
116 | ||
117 | int parse_tag_buffer(struct tag *item, const void *data, unsigned long size) | |
118 | { | |
119 | struct object_id oid; | |
120 | char type[20]; | |
121 | const char *bufptr = data; | |
122 | const char *tail = bufptr + size; | |
123 | const char *nl; | |
124 | ||
125 | if (item->object.parsed) | |
126 | return 0; | |
127 | item->object.parsed = 1; | |
128 | ||
129 | if (size < GIT_SHA1_HEXSZ + 24) | |
130 | return -1; | |
131 | if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n') | |
132 | return -1; | |
133 | ||
134 | if (!starts_with(bufptr, "type ")) | |
135 | return -1; | |
136 | bufptr += 5; | |
137 | nl = memchr(bufptr, '\n', tail - bufptr); | |
138 | if (!nl || sizeof(type) <= (nl - bufptr)) | |
139 | return -1; | |
140 | memcpy(type, bufptr, nl - bufptr); | |
141 | type[nl - bufptr] = '\0'; | |
142 | bufptr = nl + 1; | |
143 | ||
144 | if (!strcmp(type, blob_type)) { | |
145 | item->tagged = (struct object *)lookup_blob(&oid); | |
146 | } else if (!strcmp(type, tree_type)) { | |
147 | item->tagged = (struct object *)lookup_tree(&oid); | |
148 | } else if (!strcmp(type, commit_type)) { | |
149 | item->tagged = (struct object *)lookup_commit(&oid); | |
150 | } else if (!strcmp(type, tag_type)) { | |
151 | item->tagged = (struct object *)lookup_tag(&oid); | |
152 | } else { | |
153 | error("Unknown type %s", type); | |
154 | item->tagged = NULL; | |
155 | } | |
156 | ||
157 | if (bufptr + 4 < tail && starts_with(bufptr, "tag ")) | |
158 | ; /* good */ | |
159 | else | |
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 | ||
168 | if (bufptr + 7 < tail && starts_with(bufptr, "tagger ")) | |
169 | item->date = parse_tag_date(bufptr, tail); | |
170 | else | |
171 | item->date = 0; | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | int parse_tag(struct tag *item) | |
177 | { | |
178 | enum object_type type; | |
179 | void *data; | |
180 | unsigned long size; | |
181 | int ret; | |
182 | ||
183 | if (item->object.parsed) | |
184 | return 0; | |
185 | data = read_sha1_file(item->object.oid.hash, &type, &size); | |
186 | if (!data) | |
187 | return error("Could not read %s", | |
188 | oid_to_hex(&item->object.oid)); | |
189 | if (type != OBJ_TAG) { | |
190 | free(data); | |
191 | return error("Object %s not a tag", | |
192 | oid_to_hex(&item->object.oid)); | |
193 | } | |
194 | ret = parse_tag_buffer(item, data, size); | |
195 | free(data); | |
196 | return ret; | |
197 | } |