| 102 | } |
| 103 | |
| 104 | int read_table_of_contents(struct chunkfile *cf, |
| 105 | const unsigned char *mfile, |
| 106 | size_t mfile_size, |
| 107 | uint64_t toc_offset, |
| 108 | int toc_length, |
| 109 | unsigned expected_alignment) |
| 110 | { |
| 111 | int i; |
| 112 | uint32_t chunk_id; |
| 113 | const unsigned char *table_of_contents = mfile + toc_offset; |
| 114 | |
| 115 | ALLOC_GROW(cf->chunks, toc_length, cf->chunks_alloc); |
| 116 | |
| 117 | while (toc_length--) { |
| 118 | uint64_t chunk_offset, next_chunk_offset; |
| 119 | |
| 120 | chunk_id = get_be32(table_of_contents); |
| 121 | chunk_offset = get_be64(table_of_contents + 4); |
| 122 | |
| 123 | if (!chunk_id) { |
| 124 | error(_("terminating chunk id appears earlier than expected")); |
| 125 | return 1; |
| 126 | } |
| 127 | if (chunk_offset % expected_alignment != 0) { |
| 128 | error(_("chunk id %"PRIx32" not %d-byte aligned"), |
| 129 | chunk_id, expected_alignment); |
| 130 | return 1; |
| 131 | } |
| 132 | |
| 133 | table_of_contents += CHUNK_TOC_ENTRY_SIZE; |
| 134 | next_chunk_offset = get_be64(table_of_contents + 4); |
| 135 | |
| 136 | if (next_chunk_offset < chunk_offset || |
| 137 | next_chunk_offset > mfile_size - the_hash_algo->rawsz) { |
| 138 | error(_("improper chunk offset(s) %"PRIx64" and %"PRIx64""), |
| 139 | chunk_offset, next_chunk_offset); |
| 140 | return -1; |
| 141 | } |
| 142 | |
| 143 | for (i = 0; i < cf->chunks_nr; i++) { |
| 144 | if (cf->chunks[i].id == chunk_id) { |
| 145 | error(_("duplicate chunk ID %"PRIx32" found"), |
| 146 | chunk_id); |
| 147 | return -1; |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | cf->chunks[cf->chunks_nr].id = chunk_id; |
| 152 | cf->chunks[cf->chunks_nr].start = mfile + chunk_offset; |
| 153 | cf->chunks[cf->chunks_nr].size = next_chunk_offset - chunk_offset; |
| 154 | cf->chunks_nr++; |
| 155 | } |
| 156 | |
| 157 | chunk_id = get_be32(table_of_contents); |
| 158 | if (chunk_id) { |
| 159 | error(_("final chunk has non-zero id %"PRIx32""), chunk_id); |
| 160 | return -1; |
| 161 | } |
no test coverage detected