/* Structural information about the archive. */
struct archive_string format_name;
int64_t central_directory_offset;
+ int64_t central_directory_offset_adjusted;
size_t central_directory_entries_total;
size_t central_directory_entries_on_this_disk;
int has_encrypted_entries;
/* Many systems define min or MIN, but not all. */
#define zipmin(a,b) ((a) < (b) ? (a) : (b))
+#ifdef HAVE_ZLIB_H
+static int
+zip_read_data_deflate(struct archive_read *a, const void **buff,
+ size_t *size, int64_t *offset);
+#endif
+#if HAVE_LZMA_H && HAVE_LIBLZMA
+static int
+zip_read_data_zipx_lzma_alone(struct archive_read *a, const void **buff,
+ size_t *size, int64_t *offset);
+#endif
+
/* This function is used by Ppmd8_DecodeSymbol during decompression of Ppmd8
* streams inside ZIP files. It has 2 purposes: one is to fetch the next
* compressed byte from the stream, second one is to increase the counter how
return ARCHIVE_OK;
}
-#if HAVE_LZMA_H && HAVE_LIBLZMA
-/*
- * Auxiliary function to uncompress data chunk from zipx archive
- * (zip with lzma compression).
- */
-static int
-zipx_lzma_uncompress_buffer(const char *compressed_buffer,
- size_t compressed_buffer_size,
- char *uncompressed_buffer,
- size_t uncompressed_buffer_size)
-{
- int status = ARCHIVE_FATAL;
- // length of 'lzma properties data' in lzma compressed
- // data segment (stream) inside zip archive
- const size_t lzma_params_length = 5;
- // offset of 'lzma properties data' from the beginning of lzma stream
- const size_t lzma_params_offset = 4;
- // end position of 'lzma properties data' in lzma stream
- const size_t lzma_params_end = lzma_params_offset + lzma_params_length;
- if (compressed_buffer == NULL ||
- compressed_buffer_size < lzma_params_end ||
- uncompressed_buffer == NULL)
- return status;
-
- // prepare header for lzma_alone_decoder to replace zipx header
- // (see comments in 'zipx_lzma_alone_init' for justification)
-#pragma pack(push)
-#pragma pack(1)
- struct _alone_header
- {
- uint8_t bytes[5]; // lzma_params_length
- uint64_t uncompressed_size;
- } alone_header;
-#pragma pack(pop)
- // copy 'lzma properties data' blob
- memcpy(&alone_header.bytes[0], compressed_buffer + lzma_params_offset,
- lzma_params_length);
- alone_header.uncompressed_size = UINT64_MAX;
-
- // prepare new compressed buffer, see 'zipx_lzma_alone_init' for details
- const size_t lzma_alone_buffer_size =
- compressed_buffer_size - lzma_params_end + sizeof(alone_header);
- unsigned char *lzma_alone_compressed_buffer =
- (unsigned char*) malloc(lzma_alone_buffer_size);
- if (lzma_alone_compressed_buffer == NULL)
- return status;
- // copy lzma_alone header into new buffer
- memcpy(lzma_alone_compressed_buffer, (void*) &alone_header,
- sizeof(alone_header));
- // copy compressed data into new buffer
- memcpy(lzma_alone_compressed_buffer + sizeof(alone_header),
- compressed_buffer + lzma_params_end,
- compressed_buffer_size - lzma_params_end);
-
- // create and fill in lzma_alone_decoder stream
- lzma_stream stream = LZMA_STREAM_INIT;
- lzma_ret ret = lzma_alone_decoder(&stream, UINT64_MAX);
- if (ret == LZMA_OK)
- {
- stream.next_in = lzma_alone_compressed_buffer;
- stream.avail_in = lzma_alone_buffer_size;
- stream.total_in = 0;
- stream.next_out = (unsigned char*)uncompressed_buffer;
- stream.avail_out = uncompressed_buffer_size;
- stream.total_out = 0;
- ret = lzma_code(&stream, LZMA_RUN);
- if (ret == LZMA_OK || ret == LZMA_STREAM_END)
- status = ARCHIVE_OK;
- }
- lzma_end(&stream);
- free(lzma_alone_compressed_buffer);
- return status;
-}
-#endif
-
/*
* Assumes file pointer is at beginning of local file header.
*/
linkname_length = (size_t)zip_entry->compressed_size;
archive_entry_set_size(entry, 0);
- p = __archive_read_ahead(a, linkname_length, NULL);
- if (p == NULL) {
- archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
- "Truncated Zip file");
- return ARCHIVE_FATAL;
- }
+
// take into account link compression if any
size_t linkname_full_length = linkname_length;
if (zip->entry->compression != 0)
{
// symlink target string appeared to be compressed
int status = ARCHIVE_FATAL;
- char *uncompressed_buffer =
- (char*) malloc(zip_entry->uncompressed_size);
- if (uncompressed_buffer == NULL)
- {
- archive_set_error(&a->archive, ENOMEM,
- "No memory for lzma decompression");
- return status;
- }
+ const void *uncompressed_buffer;
switch (zip->entry->compression)
{
+#if HAVE_ZLIB_H
+ case 8: /* Deflate compression. */
+ zip->entry_bytes_remaining = zip_entry->compressed_size;
+ status = zip_read_data_deflate(a, &uncompressed_buffer,
+ &linkname_full_length, NULL);
+ break;
+#endif
#if HAVE_LZMA_H && HAVE_LIBLZMA
case 14: /* ZIPx LZMA compression. */
/*(see zip file format specification, section 4.4.5)*/
- status = zipx_lzma_uncompress_buffer(p,
- linkname_length,
- uncompressed_buffer,
- (size_t)zip_entry->uncompressed_size);
+ zip->entry_bytes_remaining = zip_entry->compressed_size;
+ status = zip_read_data_zipx_lzma_alone(a, &uncompressed_buffer,
+ &linkname_full_length, NULL);
break;
#endif
default: /* Unsupported compression. */
if (status == ARCHIVE_OK)
{
p = uncompressed_buffer;
- linkname_full_length =
- (size_t)zip_entry->uncompressed_size;
}
else
{
return ARCHIVE_FAILED;
}
}
+ else
+ {
+ p = __archive_read_ahead(a, linkname_length, NULL);
+ }
+
+ if (p == NULL) {
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+ "Truncated Zip file");
+ return ARCHIVE_FATAL;
+ }
sconv = zip->sconv;
if (sconv == NULL && (zip->entry->zip_flags & ZIP_UTF8_NAME))
/* To unpack ZIPX's "LZMA" (id 14) stream we can use standard liblzma
* that is a part of XZ Utils. The stream format stored inside ZIPX
* file is a modified "lzma alone" file format, that was used by the
- * `lzma` utility which was later deprecated in favour of `xz` utility. * Since those formats are nearly the same, we can use a standard
+ * `lzma` utility which was later deprecated in favour of `xz` utility.
+ * Since those formats are nearly the same, we can use a standard
* "lzma alone" decoder from XZ Utils. */
memset(&zip->zipx_lzma_stream, 0, sizeof(zip->zipx_lzma_stream));
static int
read_eocd(struct zip *zip, const char *p, int64_t current_offset)
{
+ uint16_t disk_num;
+ uint32_t cd_size, cd_offset;
+
+ disk_num = archive_le16dec(p + 4);
+ cd_size = archive_le32dec(p + 12);
+ cd_offset = archive_le32dec(p + 16);
+
/* Sanity-check the EOCD we've found. */
/* This must be the first volume. */
- if (archive_le16dec(p + 4) != 0)
+ if (disk_num != 0)
return 0;
/* Central directory must be on this volume. */
- if (archive_le16dec(p + 4) != archive_le16dec(p + 6))
+ if (disk_num != archive_le16dec(p + 6))
return 0;
/* All central directory entries must be on this volume. */
if (archive_le16dec(p + 10) != archive_le16dec(p + 8))
return 0;
/* Central directory can't extend beyond start of EOCD record. */
- if (archive_le32dec(p + 16) + archive_le32dec(p + 12)
- > current_offset)
+ if (cd_offset + cd_size > current_offset)
return 0;
/* Save the central directory location for later use. */
- zip->central_directory_offset = archive_le32dec(p + 16);
+ zip->central_directory_offset = cd_offset;
+ zip->central_directory_offset_adjusted = current_offset - cd_size;
/* This is just a tiny bit higher than the maximum
returned by the streaming Zip bidder. This ensures
/* Save the central directory offset for later use. */
zip->central_directory_offset = archive_le64dec(p + 48);
+ /* TODO: Needs scanning backwards to find the eocd64 instead of assuming */
+ zip->central_directory_offset_adjusted = zip->central_directory_offset;
return 32;
}
* know the correction we need to apply to account for leading
* padding.
*/
- if (__archive_read_seek(a, zip->central_directory_offset, SEEK_SET) < 0)
+ if (__archive_read_seek(a, zip->central_directory_offset_adjusted, SEEK_SET)
+ < 0)
return ARCHIVE_FATAL;
found = 0;
projects / platform / upstream / cmake.git / blobdiff