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Fixed seeking in uncompressed zip entries and handle Java-created JAR files. 

(Thanks to "Tree" for pointing out these bugs).
This commit is contained in:
Ryan C. Gordon 2003-03-30 18:44:59 +00:00
parent 3744f54064
commit 1344feceda
1 changed files with 11 additions and 4 deletions
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15
archivers/zip.c
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@ -341,7 +341,7 @@ static int ZIP_seek(FileHandle *handle, PHYSFS_uint64 offset)
{
PHYSFS_sint64 newpos = offset + entry->offset;
BAIL_IF_MACRO(!__PHYSFS_platformSeek(in, newpos), NULL, 0);
finfo->uncompressed_position = (PHYSFS_uint32) newpos;
finfo->uncompressed_position = (PHYSFS_uint32) offset;
} /* if */
else
@ -765,6 +765,13 @@ static int zip_parse_local(void *in, ZIPentry *entry)
PHYSFS_uint16 fnamelen;
PHYSFS_uint16 extralen;
/*
* crc and (un)compressed_size are always zero if this is a "JAR"
* archive created with Sun's Java tools, apparently. We only
* consider this archive corrupted if those entries don't match and
* aren't zero. That seems to work well.
*/
BAIL_IF_MACRO(!__PHYSFS_platformSeek(in, entry->offset), NULL, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != ZIP_LOCAL_FILE_SIG, ERR_CORRUPTED, 0);
@ -775,11 +782,11 @@ static int zip_parse_local(void *in, ZIPentry *entry)
BAIL_IF_MACRO(ui16 != entry->compression_method, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0); /* date/time */
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != entry->crc, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(ui32 && (ui32 != entry->crc), ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != entry->compressed_size, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(ui32 && (ui32 != entry->compressed_size), ERR_CORRUPTED, 0);
BAIL_IF_MACRO(!readui32(in, &ui32), NULL, 0);
BAIL_IF_MACRO(ui32 != entry->uncompressed_size, ERR_CORRUPTED, 0);
BAIL_IF_MACRO(ui32 && (ui32 != entry->uncompressed_size),ERR_CORRUPTED,0);
BAIL_IF_MACRO(!readui16(in, &fnamelen), NULL, 0);
BAIL_IF_MACRO(!readui16(in, &extralen), NULL, 0);