Code to handle some weird siutations and bad WIMs
[wimlib] / src / lookup_table.c
index 0c6a55fcccb9463c8092fda7269ef09b048745a8..0546f958a3108f41dc2b3dffc884a576567b8ea3 100644 (file)
@@ -197,7 +197,7 @@ int read_lookup_table(WIMStruct *w)
 
        while (num_entries--) {
                const u8 *p;
-               struct lookup_table_entry *cur_entry;
+               struct lookup_table_entry *cur_entry, *duplicate_entry;
 
                if (fread(buf, 1, sizeof(buf), w->fp) != sizeof(buf)) {
                        if (feof(w->fp)) {
@@ -221,7 +221,31 @@ int read_lookup_table(WIMStruct *w)
                p = get_u16(p, &cur_entry->part_number);
                p = get_u32(p, &cur_entry->refcnt);
                p = get_bytes(p, SHA1_HASH_SIZE, cur_entry->hash);
+
+               duplicate_entry = __lookup_resource(table, cur_entry->hash);
+               if (duplicate_entry) {
+                       ERROR("The WIM lookup table contains two entries with the "
+                             "same SHA1 message digest!");
+                       ERROR("The first entry is:");
+                       print_lookup_table_entry(duplicate_entry);
+                       ERROR("The second entry is:");
+                       print_lookup_table_entry(cur_entry);
+                       ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+                       goto out;
+               }
                lookup_table_insert(table, cur_entry);
+
+               if (!(cur_entry->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED)
+                   && (cur_entry->resource_entry.size !=
+                     cur_entry->resource_entry.original_size))
+               {
+                       ERROR("Found uncompressed resource with original size "
+                             "not the same as compressed size");
+                       ERROR("The lookup table entry for the resource is as follows:");
+                       print_lookup_table_entry(cur_entry);
+                       ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+                       goto out;
+               }
        }
        DEBUG("Done reading lookup table.");
        w->lookup_table = table;