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Commit | Line | Data |
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b6fdc44c | 1 | #include "git-compat-util.h" |
32a8f510 | 2 | #include "environment.h" |
41771fa4 | 3 | #include "hex.h" |
57a6a500 | 4 | #include "repository.h" |
f9253394 | 5 | #include "pack.h" |
1e49f22f | 6 | #include "progress.h" |
0317f455 | 7 | #include "packfile.h" |
87bed179 | 8 | #include "object-file.h" |
a034e910 | 9 | #include "object-store-ll.h" |
f9253394 | 10 | |
9cba13ca | 11 | struct idx_entry { |
3af51928 | 12 | off_t offset; |
c41a4a94 | 13 | unsigned int nr; |
3af51928 AJ |
14 | }; |
15 | ||
16 | static int compare_entries(const void *e1, const void *e2) | |
17 | { | |
18 | const struct idx_entry *entry1 = e1; | |
19 | const struct idx_entry *entry2 = e2; | |
20 | if (entry1->offset < entry2->offset) | |
21 | return -1; | |
22 | if (entry1->offset > entry2->offset) | |
23 | return 1; | |
24 | return 0; | |
25 | } | |
26 | ||
c41a4a94 NP |
27 | int check_pack_crc(struct packed_git *p, struct pack_window **w_curs, |
28 | off_t offset, off_t len, unsigned int nr) | |
29 | { | |
30 | const uint32_t *index_crc; | |
1e4cd68c | 31 | uint32_t data_crc = crc32(0, NULL, 0); |
c41a4a94 NP |
32 | |
33 | do { | |
ef49a7a0 | 34 | unsigned long avail; |
c41a4a94 NP |
35 | void *data = use_pack(p, w_curs, offset, &avail); |
36 | if (avail > len) | |
37 | avail = len; | |
38 | data_crc = crc32(data_crc, data, avail); | |
39 | offset += avail; | |
40 | len -= avail; | |
41 | } while (len); | |
42 | ||
43 | index_crc = p->index_data; | |
f86f7695 | 44 | index_crc += 2 + 256 + (size_t)p->num_objects * (the_hash_algo->rawsz/4) + nr; |
c41a4a94 NP |
45 | |
46 | return data_crc != ntohl(*index_crc); | |
47 | } | |
48 | ||
94e10825 NTND |
49 | static int verify_packfile(struct repository *r, |
50 | struct packed_git *p, | |
c9486eb0 | 51 | struct pack_window **w_curs, |
1e49f22f NTND |
52 | verify_fn fn, |
53 | struct progress *progress, uint32_t base_count) | |
54 | ||
f9253394 | 55 | { |
c4001d92 | 56 | off_t index_size = p->index_size; |
42873078 | 57 | const unsigned char *index_base = p->index_data; |
ccc12e06 | 58 | git_hash_ctx ctx; |
9fd75046 | 59 | unsigned char hash[GIT_MAX_RAWSZ], *pack_sig; |
4277c670 | 60 | off_t offset = 0, pack_sig_ofs = 0; |
326bf396 | 61 | uint32_t nr_objects, i; |
62413604 | 62 | int err = 0; |
3af51928 | 63 | struct idx_entry *entries; |
f9253394 | 64 | |
a9445d85 JK |
65 | if (!is_pack_valid(p)) |
66 | return error("packfile %s cannot be accessed", p->pack_name); | |
f9253394 | 67 | |
5ec9b8ac | 68 | r->hash_algo->init_fn(&ctx); |
4277c670 | 69 | do { |
ef49a7a0 | 70 | unsigned long remaining; |
079afb18 SP |
71 | unsigned char *in = use_pack(p, w_curs, offset, &remaining); |
72 | offset += remaining; | |
4277c670 | 73 | if (!pack_sig_ofs) |
5ec9b8ac | 74 | pack_sig_ofs = p->pack_size - r->hash_algo->rawsz; |
62413604 NP |
75 | if (offset > pack_sig_ofs) |
76 | remaining -= (unsigned int)(offset - pack_sig_ofs); | |
5ec9b8ac | 77 | r->hash_algo->update_fn(&ctx, in, remaining); |
4277c670 | 78 | } while (offset < pack_sig_ofs); |
5ec9b8ac | 79 | r->hash_algo->final_fn(hash, &ctx); |
62413604 | 80 | pack_sig = use_pack(p, w_curs, pack_sig_ofs, NULL); |
67947c34 | 81 | if (!hasheq(hash, pack_sig)) |
ccc12e06 | 82 | err = error("%s pack checksum mismatch", |
62413604 | 83 | p->pack_name); |
5ec9b8ac | 84 | if (!hasheq(index_base + index_size - r->hash_algo->hexsz, pack_sig)) |
ccc12e06 | 85 | err = error("%s pack checksum does not match its index", |
62413604 | 86 | p->pack_name); |
079afb18 | 87 | unuse_pack(w_curs); |
f3bf9224 JH |
88 | |
89 | /* Make sure everything reachable from idx is valid. Since we | |
90 | * have verified that nr_objects matches between idx and pack, | |
91 | * we do not do scan-streaming check on the pack file. | |
92 | */ | |
57059091 | 93 | nr_objects = p->num_objects; |
b32fa95f | 94 | ALLOC_ARRAY(entries, nr_objects + 1); |
c41a4a94 | 95 | entries[nr_objects].offset = pack_sig_ofs; |
3af51928 AJ |
96 | /* first sort entries by pack offset, since unpacking them is more efficient that way */ |
97 | for (i = 0; i < nr_objects; i++) { | |
99093238 | 98 | entries[i].offset = nth_packed_object_offset(p, i); |
c41a4a94 | 99 | entries[i].nr = i; |
3af51928 | 100 | } |
9ed0d8d6 | 101 | QSORT(entries, nr_objects, compare_entries); |
3af51928 | 102 | |
62413604 | 103 | for (i = 0; i < nr_objects; i++) { |
f3bf9224 | 104 | void *data; |
63f4a7fc | 105 | struct object_id oid; |
21666f1a | 106 | enum object_type type; |
c4001d92 | 107 | unsigned long size; |
ec9d2249 NTND |
108 | off_t curpos; |
109 | int data_valid; | |
f3bf9224 | 110 | |
63f4a7fc JK |
111 | if (nth_packed_object_id(&oid, p, entries[i].nr) < 0) |
112 | BUG("unable to get oid of object %lu from %s", | |
113 | (unsigned long)entries[i].nr, p->pack_name); | |
114 | ||
c41a4a94 NP |
115 | if (p->index_version > 1) { |
116 | off_t offset = entries[i].offset; | |
117 | off_t len = entries[i+1].offset - offset; | |
118 | unsigned int nr = entries[i].nr; | |
119 | if (check_pack_crc(p, w_curs, offset, len, nr)) | |
120 | err = error("index CRC mismatch for object %s " | |
121 | "from %s at offset %"PRIuMAX"", | |
63f4a7fc | 122 | oid_to_hex(&oid), |
c41a4a94 NP |
123 | p->pack_name, (uintmax_t)offset); |
124 | } | |
ec9d2249 NTND |
125 | |
126 | curpos = entries[i].offset; | |
127 | type = unpack_object_header(p, w_curs, &curpos, &size); | |
128 | unuse_pack(w_curs); | |
129 | ||
130 | if (type == OBJ_BLOB && big_file_threshold <= size) { | |
131 | /* | |
0f156dbb | 132 | * Let stream_object_signature() check it with |
ec9d2249 NTND |
133 | * the streaming interface; no point slurping |
134 | * the data in-core only to discard. | |
135 | */ | |
136 | data = NULL; | |
137 | data_valid = 0; | |
138 | } else { | |
94e10825 | 139 | data = unpack_entry(r, p, entries[i].offset, &type, &size); |
ec9d2249 NTND |
140 | data_valid = 1; |
141 | } | |
142 | ||
143 | if (data_valid && !data) | |
62413604 | 144 | err = error("cannot unpack %s from %s at offset %"PRIuMAX"", |
63f4a7fc | 145 | oid_to_hex(&oid), p->pack_name, |
62413604 | 146 | (uintmax_t)entries[i].offset); |
0f156dbb | 147 | else if (data && check_object_signature(r, &oid, data, size, |
44439c1c | 148 | type) < 0) |
0f156dbb ÆAB |
149 | err = error("packed %s from %s is corrupt", |
150 | oid_to_hex(&oid), p->pack_name); | |
151 | else if (!data && stream_object_signature(r, &oid) < 0) | |
1038f0c0 | 152 | err = error("packed %s from %s is corrupt", |
63f4a7fc | 153 | oid_to_hex(&oid), p->pack_name); |
c9486eb0 NTND |
154 | else if (fn) { |
155 | int eaten = 0; | |
63f4a7fc | 156 | err |= fn(&oid, type, size, data, &eaten); |
c9486eb0 NTND |
157 | if (eaten) |
158 | data = NULL; | |
159 | } | |
1e49f22f NTND |
160 | if (((base_count + i) & 1023) == 0) |
161 | display_progress(progress, base_count + i); | |
f3bf9224 | 162 | free(data); |
1e49f22f | 163 | |
f3bf9224 | 164 | } |
1e49f22f | 165 | display_progress(progress, base_count + i); |
3af51928 | 166 | free(entries); |
f3bf9224 JH |
167 | |
168 | return err; | |
f9253394 JH |
169 | } |
170 | ||
9b0aa728 | 171 | int verify_pack_index(struct packed_git *p) |
f9253394 | 172 | { |
62413604 | 173 | int err = 0; |
f9253394 | 174 | |
d079837e SP |
175 | if (open_pack_index(p)) |
176 | return error("packfile %s index not opened", p->pack_name); | |
d079837e | 177 | |
f9253394 | 178 | /* Verify SHA1 sum of the index file */ |
f9221e2c | 179 | if (!hashfile_checksum_valid(p->index_data, p->index_size)) |
ccc12e06 | 180 | err = error("Packfile index for %s hash mismatch", |
f3bf9224 | 181 | p->pack_name); |
9b0aa728 SP |
182 | return err; |
183 | } | |
184 | ||
94e10825 | 185 | int verify_pack(struct repository *r, struct packed_git *p, verify_fn fn, |
1e49f22f | 186 | struct progress *progress, uint32_t base_count) |
9b0aa728 SP |
187 | { |
188 | int err = 0; | |
189 | struct pack_window *w_curs = NULL; | |
190 | ||
191 | err |= verify_pack_index(p); | |
192 | if (!p->index_data) | |
193 | return -1; | |
f3bf9224 | 194 | |
94e10825 | 195 | err |= verify_packfile(r, p, &w_curs, fn, progress, base_count); |
62413604 | 196 | unuse_pack(&w_curs); |
f3bf9224 | 197 | |
62413604 | 198 | return err; |
f9253394 | 199 | } |