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Commit | Line | Data |
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f9253394 | 1 | #include "cache.h" |
57a6a500 | 2 | #include "repository.h" |
f9253394 | 3 | #include "pack.h" |
70f5d5d3 | 4 | #include "pack-revindex.h" |
1e49f22f | 5 | #include "progress.h" |
0317f455 | 6 | #include "packfile.h" |
a80d72db | 7 | #include "object-store.h" |
f9253394 | 8 | |
9cba13ca | 9 | struct idx_entry { |
3af51928 | 10 | off_t offset; |
c41a4a94 | 11 | unsigned int nr; |
3af51928 AJ |
12 | }; |
13 | ||
14 | static int compare_entries(const void *e1, const void *e2) | |
15 | { | |
16 | const struct idx_entry *entry1 = e1; | |
17 | const struct idx_entry *entry2 = e2; | |
18 | if (entry1->offset < entry2->offset) | |
19 | return -1; | |
20 | if (entry1->offset > entry2->offset) | |
21 | return 1; | |
22 | return 0; | |
23 | } | |
24 | ||
c41a4a94 NP |
25 | int check_pack_crc(struct packed_git *p, struct pack_window **w_curs, |
26 | off_t offset, off_t len, unsigned int nr) | |
27 | { | |
28 | const uint32_t *index_crc; | |
1e4cd68c | 29 | uint32_t data_crc = crc32(0, NULL, 0); |
c41a4a94 NP |
30 | |
31 | do { | |
ef49a7a0 | 32 | unsigned long avail; |
c41a4a94 NP |
33 | void *data = use_pack(p, w_curs, offset, &avail); |
34 | if (avail > len) | |
35 | avail = len; | |
36 | data_crc = crc32(data_crc, data, avail); | |
37 | offset += avail; | |
38 | len -= avail; | |
39 | } while (len); | |
40 | ||
41 | index_crc = p->index_data; | |
ccc12e06 | 42 | index_crc += 2 + 256 + p->num_objects * (the_hash_algo->rawsz/4) + nr; |
c41a4a94 NP |
43 | |
44 | return data_crc != ntohl(*index_crc); | |
45 | } | |
46 | ||
94e10825 NTND |
47 | static int verify_packfile(struct repository *r, |
48 | struct packed_git *p, | |
c9486eb0 | 49 | struct pack_window **w_curs, |
1e49f22f NTND |
50 | verify_fn fn, |
51 | struct progress *progress, uint32_t base_count) | |
52 | ||
f9253394 | 53 | { |
c4001d92 | 54 | off_t index_size = p->index_size; |
42873078 | 55 | const unsigned char *index_base = p->index_data; |
ccc12e06 | 56 | git_hash_ctx ctx; |
9fd75046 | 57 | unsigned char hash[GIT_MAX_RAWSZ], *pack_sig; |
4277c670 | 58 | off_t offset = 0, pack_sig_ofs = 0; |
326bf396 | 59 | uint32_t nr_objects, i; |
62413604 | 60 | int err = 0; |
3af51928 | 61 | struct idx_entry *entries; |
f9253394 | 62 | |
a9445d85 JK |
63 | if (!is_pack_valid(p)) |
64 | return error("packfile %s cannot be accessed", p->pack_name); | |
f9253394 | 65 | |
5ec9b8ac | 66 | r->hash_algo->init_fn(&ctx); |
4277c670 | 67 | do { |
ef49a7a0 | 68 | unsigned long remaining; |
079afb18 SP |
69 | unsigned char *in = use_pack(p, w_curs, offset, &remaining); |
70 | offset += remaining; | |
4277c670 | 71 | if (!pack_sig_ofs) |
5ec9b8ac | 72 | pack_sig_ofs = p->pack_size - r->hash_algo->rawsz; |
62413604 NP |
73 | if (offset > pack_sig_ofs) |
74 | remaining -= (unsigned int)(offset - pack_sig_ofs); | |
5ec9b8ac | 75 | r->hash_algo->update_fn(&ctx, in, remaining); |
4277c670 | 76 | } while (offset < pack_sig_ofs); |
5ec9b8ac | 77 | r->hash_algo->final_fn(hash, &ctx); |
62413604 | 78 | pack_sig = use_pack(p, w_curs, pack_sig_ofs, NULL); |
67947c34 | 79 | if (!hasheq(hash, pack_sig)) |
ccc12e06 | 80 | err = error("%s pack checksum mismatch", |
62413604 | 81 | p->pack_name); |
5ec9b8ac | 82 | if (!hasheq(index_base + index_size - r->hash_algo->hexsz, pack_sig)) |
ccc12e06 | 83 | err = error("%s pack checksum does not match its index", |
62413604 | 84 | p->pack_name); |
079afb18 | 85 | unuse_pack(w_curs); |
f3bf9224 JH |
86 | |
87 | /* Make sure everything reachable from idx is valid. Since we | |
88 | * have verified that nr_objects matches between idx and pack, | |
89 | * we do not do scan-streaming check on the pack file. | |
90 | */ | |
57059091 | 91 | nr_objects = p->num_objects; |
b32fa95f | 92 | ALLOC_ARRAY(entries, nr_objects + 1); |
c41a4a94 | 93 | entries[nr_objects].offset = pack_sig_ofs; |
3af51928 AJ |
94 | /* first sort entries by pack offset, since unpacking them is more efficient that way */ |
95 | for (i = 0; i < nr_objects; i++) { | |
99093238 | 96 | entries[i].offset = nth_packed_object_offset(p, i); |
c41a4a94 | 97 | entries[i].nr = i; |
3af51928 | 98 | } |
9ed0d8d6 | 99 | QSORT(entries, nr_objects, compare_entries); |
3af51928 | 100 | |
62413604 | 101 | for (i = 0; i < nr_objects; i++) { |
f3bf9224 | 102 | void *data; |
63f4a7fc | 103 | struct object_id oid; |
21666f1a | 104 | enum object_type type; |
c4001d92 | 105 | unsigned long size; |
ec9d2249 NTND |
106 | off_t curpos; |
107 | int data_valid; | |
f3bf9224 | 108 | |
63f4a7fc JK |
109 | if (nth_packed_object_id(&oid, p, entries[i].nr) < 0) |
110 | BUG("unable to get oid of object %lu from %s", | |
111 | (unsigned long)entries[i].nr, p->pack_name); | |
112 | ||
c41a4a94 NP |
113 | if (p->index_version > 1) { |
114 | off_t offset = entries[i].offset; | |
115 | off_t len = entries[i+1].offset - offset; | |
116 | unsigned int nr = entries[i].nr; | |
117 | if (check_pack_crc(p, w_curs, offset, len, nr)) | |
118 | err = error("index CRC mismatch for object %s " | |
119 | "from %s at offset %"PRIuMAX"", | |
63f4a7fc | 120 | oid_to_hex(&oid), |
c41a4a94 NP |
121 | p->pack_name, (uintmax_t)offset); |
122 | } | |
ec9d2249 NTND |
123 | |
124 | curpos = entries[i].offset; | |
125 | type = unpack_object_header(p, w_curs, &curpos, &size); | |
126 | unuse_pack(w_curs); | |
127 | ||
128 | if (type == OBJ_BLOB && big_file_threshold <= size) { | |
129 | /* | |
17e65451 | 130 | * Let check_object_signature() check it with |
ec9d2249 NTND |
131 | * the streaming interface; no point slurping |
132 | * the data in-core only to discard. | |
133 | */ | |
134 | data = NULL; | |
135 | data_valid = 0; | |
136 | } else { | |
94e10825 | 137 | data = unpack_entry(r, p, entries[i].offset, &type, &size); |
ec9d2249 NTND |
138 | data_valid = 1; |
139 | } | |
140 | ||
141 | if (data_valid && !data) | |
62413604 | 142 | err = error("cannot unpack %s from %s at offset %"PRIuMAX"", |
63f4a7fc | 143 | oid_to_hex(&oid), p->pack_name, |
62413604 | 144 | (uintmax_t)entries[i].offset); |
63f4a7fc | 145 | else if (check_object_signature(r, &oid, data, size, type_name(type))) |
1038f0c0 | 146 | err = error("packed %s from %s is corrupt", |
63f4a7fc | 147 | oid_to_hex(&oid), p->pack_name); |
c9486eb0 NTND |
148 | else if (fn) { |
149 | int eaten = 0; | |
63f4a7fc | 150 | err |= fn(&oid, type, size, data, &eaten); |
c9486eb0 NTND |
151 | if (eaten) |
152 | data = NULL; | |
153 | } | |
1e49f22f NTND |
154 | if (((base_count + i) & 1023) == 0) |
155 | display_progress(progress, base_count + i); | |
f3bf9224 | 156 | free(data); |
1e49f22f | 157 | |
f3bf9224 | 158 | } |
1e49f22f | 159 | display_progress(progress, base_count + i); |
3af51928 | 160 | free(entries); |
f3bf9224 JH |
161 | |
162 | return err; | |
f9253394 JH |
163 | } |
164 | ||
9b0aa728 | 165 | int verify_pack_index(struct packed_git *p) |
f9253394 | 166 | { |
d079837e SP |
167 | off_t index_size; |
168 | const unsigned char *index_base; | |
ccc12e06 | 169 | git_hash_ctx ctx; |
170 | unsigned char hash[GIT_MAX_RAWSZ]; | |
62413604 | 171 | int err = 0; |
f9253394 | 172 | |
d079837e SP |
173 | if (open_pack_index(p)) |
174 | return error("packfile %s index not opened", p->pack_name); | |
175 | index_size = p->index_size; | |
176 | index_base = p->index_data; | |
177 | ||
f9253394 | 178 | /* Verify SHA1 sum of the index file */ |
ccc12e06 | 179 | the_hash_algo->init_fn(&ctx); |
180 | the_hash_algo->update_fn(&ctx, index_base, (unsigned int)(index_size - the_hash_algo->rawsz)); | |
181 | the_hash_algo->final_fn(hash, &ctx); | |
67947c34 | 182 | if (!hasheq(hash, index_base + index_size - the_hash_algo->rawsz)) |
ccc12e06 | 183 | err = error("Packfile index for %s hash mismatch", |
f3bf9224 | 184 | p->pack_name); |
9b0aa728 SP |
185 | return err; |
186 | } | |
187 | ||
94e10825 | 188 | int verify_pack(struct repository *r, struct packed_git *p, verify_fn fn, |
1e49f22f | 189 | struct progress *progress, uint32_t base_count) |
9b0aa728 SP |
190 | { |
191 | int err = 0; | |
192 | struct pack_window *w_curs = NULL; | |
193 | ||
194 | err |= verify_pack_index(p); | |
195 | if (!p->index_data) | |
196 | return -1; | |
f3bf9224 | 197 | |
94e10825 | 198 | err |= verify_packfile(r, p, &w_curs, fn, progress, base_count); |
62413604 | 199 | unuse_pack(&w_curs); |
f3bf9224 | 200 | |
62413604 | 201 | return err; |
f9253394 | 202 | } |