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Diffstat (limited to '')
117 files changed, 118 insertions, 185 deletions
diff --git a/tests/files/README b/tests/files/README index 4d0ef8bd..7c7f4e18 100644 --- a/tests/files/README +++ b/tests/files/README @@ -14,259 +14,192 @@ 1. File Types Good files (good-*.lzma) must decode successfully without requiring - a lot of CPU time or RAM. If the decoder supports only Single-Block - Streams, then good-multi-*.lzma won't decode, of course. + a lot of CPU time or RAM. + + Unsupported files (unsupported-*.lzma) are good files, but headers + indicate features not supported by the current file format + specification. Bad files (bad-*.lzma) must cause the decoder to give an error. Like with the good files, these files must not require a lot of CPU time or RAM before they get detected to be broken. - Malicious files (malicious-*.lzma) are good in terms of the file format - specification, but try to trigger excessive CPU, RAM or disk usage in - the decoder. To prevent malicious files from putting the decoder in - inifinite loop (*), eating all available RAM or disk space, decoders - should have internal limiters that catch these situations. - - (*) Strictly speaking not infinite, but if decoding of a small file - would take a few weeks or even years, it's an infinite loop in - practice. - 2. Descriptions of Individual Files 2.1. Good Files - good-single-none.lzma uses implicit Copy filter with known Uncompressed - Size. + good-0-empty.lzma has one Stream with no Blocks. + + good-0pad-empty.lzma has one Stream with no Blocks followed by + four-byte Stream Padding. - good-single-none-pad.lzma is good-single-none.lzma with Footer Padding. + good-0cat-empty.lzma has two zero-Block Streams concatenated without + Stream Padding. - good-cat-single-none-pad.lzma is two good-single-none-pad.lzma files - concatenated as is. Fully decoding this file requires that the decoder - supports decoding concatenated files. + good-0catpad-empty.lzma has two zero-Block Streams concatenated with + four-byte Stream Padding between the Streams. - good-single-subblock_implicit.lzma uses implicit Subblock filter. + good-1-check-none.lzma has one Stream with one Block with two + uncompressed LZMA2 chunks and no integrity check. - good-single-lzma.lzma is LZMA compressed file with EOPM. + good-1-check-crc32.lzma has one Stream with one Block with two + uncompressed LZMA2 chunks and CRC32 check. - good-single-subblock-lzma.lzma has basic combination of Subblock and - LZMA filters. + good-1-check-crc64.lzma is like good-1-check-crc32.lzma but with CRC64. - good-single-none-empty_1.lzma is an empty file with implicit Copy - filter and no integrity Check. + good-1-check-sha256.lzma is like good-1-check-crc32.lzma but with + SHA256. - good-single-none-empty_2.lzma is an empty file with implicit Copy - filter and CRC32 as Check. + good-2-lzma2.lzma has one Stream with two Blocks with one uncompressed + LZMA2 chunk in each Block. - good-single-none-empty_3.lzma is an empty file with implicit Copy - filter, known Compressed Size, and no integrity Check. + good-1-block_header-1.lzma has both Compressed Size and Uncompressed + Size in the Block Header. This has also four extra bytes of Header + Padding. - good-single-lzma-empty.lzma is an empty file with LZMA filter and no - integrity Check. + good-1-block_header-2.lzma has known Compressed Size. - good-single-subblock_rle.lzma takes advantage of Subblock filter's - run-length encoding. + good-1-block_header-3.lzma has known Uncompressed Size. - good-single-delta-lzma.tiff.lzma is an image file that compresses - better with Delta+LZMA than with plain LZMA. + good-1-delta-lzma2.tiff.lzma is an image file that compresses + better with Delta+LZMA2 than with plain LZMA2. - good-single-x86-lzma.lzma uses the x86 filter (BCJ) and LZMA. The + good-1-x86-lzma2.lzma uses the x86 filter (BCJ) and LZMA2. The uncompressed file is compress_prepared_bcj_x86 found from the tests directory. - good-single-sparc-lzma.lzma uses the SPARC filter and LZMA. The + good-1-sparc-lzma2.lzma uses the SPARC filter and LZMA. The uncompressed file is compress_prepared_bcj_sparc found from the tests directory. - good-single-lzma-flush_1.lzma has a flush marker in the middle of - the file, and no EOPM. - - good-single-lzma-flush_2.lzma has a flush marker in the middle of - the file and just before EOPM. - - good-multi-none-1.lzma is a basic Multi-Block Stream with two Data - Blocks and Footer Metadata Block. - - good-multi-none-2.lzma is good-multi-none-1.lzma with Total Size and - Uncompressed Size added to the Footer Metadata Block. - - good-multi-none-extra_1.lzma has the `Extra is present' flag set but - no actual Extra Records. - - good-multi-none-extra_2.lzma has two non-empty Extra Records. - - good-multi-none-extra_3.lzma has an Extra Record that has empty Data. - - good-multi-none-header_1.lzma has very minimal Header Metadata Block - with only the Metadata Flags field. - - good-multi-none-header_2.lzma has all information in both Header and - Footer Metadata Blocks. The Size of Header Metadata Block has wrong - value in Header Metadata Block, but this value must be ignored by - the decoder in case of Header Metadata Block. - - good-multi-none-header_3.lzma has Index only in the Header Metadata - Block. Footer Metadata Block contains only Size of Header Metadata - Block and Total Size. - - good-multi-none-block_1.lzma has Index in Header Metadata Block. The - Compressed Size and Uncompressed Size fields are present in the Data - Blocks. There is some Footer Padding between the Blocks. - - good-multi-none-block_2.lzma has Index in Header Metadata Block. The - Uncompressed Size field is present in Data Blocks and no EOPM is used. + good-1-lzma2-1.lzma has two LZMA2 chunks, of which the second sets + new properties. + good-1-lzma2-2.lzma has two LZMA2 chunks, of which the second resets + the state without specifying new properties. -2.2. Bad Files + good-1-lzma2-3.lzma has two LZMA2 chunks, of which the first is + uncompressed and the second is LZMA. The first chunk resets dictionary + and the second sets new properties. - bad-single-none-truncated.lzma is good-single-none.lzma without the - last byte of the file. + good-1-3delta-lzma2.lzma has three Delta filters and LZMA2. - bad-cat-single-none-pad_garbage_1.lzma is good-cat-single-none-pad.lzma - with 0xFE appended to the end of the file. 0xFE doesn't begin .lzma - or LZMA_Alone format file. - bad-cat-single-none-pad_garbage_2.lzma is good-cat-single-none-pad.lzma - with 0xFF appended to the end of the file. 0xFF begins .lzma format - file, thus the decoder has to detect that the file is incomplete. +2.2. Unsupported Files - bad-cat-single-none-pad_garbage_3.lzma is good-cat-single-none-pad.lzma - with 0x5D appended to the end of the file. 0x5D is the most common - first byte of LZMA_Alone format file. + unsupported-check.lzma uses Check ID 0x02 which isn't supported by + the current version of the file format. It is implementation-defined + how this file handled (it may reject it, or decode it possibly with + a warning). - bad-single-none-footer_filter_flags.lzma has different Stream Flags - in Stream Footer than in Stream Header. + unsupported-block_header.lzma has a non-nul byte in Header Padding, + which may indicate presence of a new unsupported field. - bad-single-none-too_long_vli.lzma has 10-byte variable-length integer. + unsupported-filter_flags-1.lzma has unsupported Filter ID 0x7F. - bad-single-none-empty.lzma is like good-single-none-empty_3.lzma but - with non-zero value in the Compressed Size field. + unsupported-filter_flags-2.lzma specifies only Delta filter in the + List of Filter Flags, but Delta isn't allowed as the last filter in + the chain. It could be a little more correct to detect this file as + corrupt instead of unsupported, but saying it is unsupported is + simpler in case of liblzma. - bad-single-data_after_eopm_1.lzma has LZMA+Subblock, where the Subblock - filter gives one byte of data to LZMA after LZMA has detected EOPM. + unsupported-filter_flags-3.lzma specifies two LZMA2 filters in the + List of Filter Flags. LZMA2 is allowed only as the last filter in the + chain. It could be a little more correct to detect this file as + corrupt instead of unsupported, but saying it is unsupported is + simpler in case of liblzma. - bad-single-data_after_eopm_2.lzma is like - bad-single-data_after_eopm_1.lzma but Subblock gives 256 MiB of data - to LZMA after LZMA has detected EOPM. - bad-single-subblock_subblock.lzma has Subblock+Subblock, where the - Subblock decoder is given End of Input in the middle of a Subblock. +2.3. Bad Files - bad-single-subblock-padding_loop.lzma contains huge amount of - consecutive Padding bytes, which isn't allowed by the Subblock filter - format. If it were allowed, this file would hang the decoder for very - long time (weeks to years). + bad-0pad-empty.lzma has one Stream with no Blocks followed by + five-byte Stream Padding. Stream Padding must be a multiple of four + bytes, thus this file is corrupt. - bad-single-subblock1023-slow.lzma is similar to - malicious-single-subblock31-slow.lzma except that this uses 1023 bytes - of Padding in every place instead of 31 bytes. The Subblock filter - format specification allows only 31-byte Padings, thus this file must - get detected as bad without producing any output. Allowing larger - Padding than 31 bytes was considered (so this test file was created), - but it seemed to be a bad idea since it would increase worst-case CPU - usage. + bad-0catpad-empty.lzma has two zero-Block Streams concatenated with + five-byte Stream Padding between the Streams. - bad-single-lzma-flush_beginning.lzma has flush marker in the beginning - of the LZMA data. + bad-0cat-alone.lzma is good-0-empty.lzma concatenated with an empty + LZMA_Alone file. - bad-single-lzma-flush_twice.lzma has two flush markers with no data - between them. + bad-0-empty-truncated.lzma is good-0-empty.lzma without the last byte + of the file. - bad-multi-none-1.lzma has data after the last field in the Metadata - Block and the `Extra is present' flag is not set. + bad-0-nonempty_index.lzma has no Blocks but Index claims that there is + one Block. - bad-multi-none-2.lzma has wrong Total Size in Footer Metadata Block. + bad-0-backward_size.lzma has wrong Backward Size in Stream Footer. - bad-multi-none-3.lzma has wrong Uncompressed Size in Footer Metadata - Block. + bad-1-stream_flags-1.lzma has different Stream Flags in Stream Header + and Stream Footer. - bad-multi-none-index_1.lzma has wrong value in the Number of Data - Blocks field. + bad-1-stream_flags-2.lzma has wrong CRC32 in Stream Header. - bad-multi-none-index_2.lzma has too short Metadata to contain all - the Index Records. + bad-1-stream_flags-3.lzma has wrong CRC32 in Stream Footer. - bad-multi-none-index_3.lzma has wrong value in Total Size field in - the Index. + bad-1-vli-1.lzma has two-byte variable-length integer in the + Uncompressed Size field in Block Header while one-byte would be enough + for that value. It's important that the file gets rejected due to too + big integer encoding instead of due to Uncompressed Size not matching + the value stored in the Block Header. That is, the decoder must not + try to decode the Compressed Data field. - bad-multi-none-index_4.lzma has wrong value in Uncompressed Size field - in the Index. + bad-1-vli-2.lzma has ten-byte variable-length integer as Uncompressed + Size in Block Header. It's important that the file gets rejected due + to too big integer encoding instead of due to Uncompressed Size not + matching the value stored in the Block Header. That is, the decoder + must not try to decode the Compressed Data field. - bad-multi-none-extra_1.lzma has incomplete Extra Record at the end of - the Metadata Block. + bad-1-block_header-1.lzma has Block Header that ends in the middle of + the Filter Flags field. - bad-multi-none-extra_2.lzma has incomplete variable-length integer as - Extra Record ID. + bad-1-block_header-2.lzma has Block Header that has Compressed Size and + Uncompressed Size but no List of Filter Flags field. - bad-multi-none-extra_3.lzma has incomplete Extra Record at the end of - the Metadata Block. + bad-1-block_header-3.lzma has wrong CRC32 in Block Header. - bad-multi-none-header_1.lzma has empty Header Metadata Block (even - the Metadata Flags field is not present). + bad-1-block_header-4.lzma has too big Compressed Size (2^63 bytes while + maximum is 2^63 - 4 bytes) in Block Header. It's important that the + file gets rejected due to invalid Compressed Size value; the decoder + must not try decoding the Compressed Data field. - bad-multi-none-header_2.lzma has Index in the Header Metadata Block, - which describes only one Data Block, while the Stream actually has - two Data Blocks. A sophisticated decoder should give an error when - it detects the second Data Block; all Multi-Block decoders must - detect the file as corrupt at some point. + bad-2-index-1.lzma has wrong Total Sizes in Index. - bad-multi-none-header_3.lzma contains too small Total Size in Header - Metadata Block. A sophisticated decoder should abort decoding before - the second Data Block, preferably before the first Data Block has - been finished; all Multi-Block decoders must detect the file as - corrupt at some point. + bad-2-index-2.lzma has wrong Uncompressed Sizes in Index. - bad-multi-none-header_4.lzma is like bad-multi-none-header_3.lzma but - with too small Uncompressed Size. + bad-2-index-3.lzma has non-nul byte in Index Padding. - bad-multi-none-header_5.lzma has Index in the Header Metadata Block, - but the Total Size field is missing from the Footer Metadata Block. + bad-2-index-4.lzma wrong CRC32 in Index. - bad-multi-none-header_6.lzma has both Index and Total Size in Header - Metadata Block, but Total Size doesn't match the Index. A sophisticated - decoder should abort before decoding any Data Blocks; all Multi-Block - decoders must detect the file as corrupt at some point. + bad-2-compressed_data_padding.lzma has non-nul byte in the padding of + the Compressed Data field of the first Block. - bad-multi-none-header_7.lzma has zero as the Size of Header Metadata - Block in the Header Metadata Block. + bad-1-check-crc32.lzma has wrong Check (CRC32). - bad-multi-none-block_1.lzma has wrong Uncompressed Size in the first - Data Block. A sophisticated decoder should detect this error before - producing any output, because it can see that the Uncompressed Size - doesn't match with the Index in Header Metadata Block; all Multi-Block - decoders must detect the file as corrupt at some point. + bad-1-check-crc64.lzma has wrong Check (CRC64). - bad-multi-none-block_2.lzma has too big Compressed Size in the first - Data Block. A sophisticated decoder may be able to detect the file as - corrupt before producing any output, because Comrpessed Size + size - of Block Header exceed the Total Size stored in Index in Header - Metadata Block. A sophisticated decoder should be able to detect the - error before the end of the first Data Block; all Multi-Block decoders - must detect the file as corrupt at some point. + bad-1-check-sha256.lzma has wrong Check (SHA-256). - bad-multi-none-block_3.lzma has only the Compressed Size field in the - Block Header of the second Data Block and EOPM isn't used. + bad-1-lzma2-1.lzma has LZMA2 stream whose first chunk (uncompressed) + doesn't reset the dictionary. + bad-1-lzma2-2.lzma has two LZMA2 chunks, of which the second chunk + indicates dictionary reset, but the LZMA compressed data tries to + repeat data from the previous chunk. -2.3. Malicious Files + bad-1-lzma2-3.lzma sets new invalid properties (lc=8, lp=0, pb=0) in + the middle of Block. - malicious-single-subblock31-slow.lzma requires quite a bit of CPU time - per decoded byte. It contains LZMA compressed Subblock filter data that - has as much Padding as the specification allows. LZMA is also used as - a Subfilter, to further slowdown the decoder. Every Subfilter instance - produces only one byte of output. If you can create a file that wastes - notably more CPU cycles than this file, please contact Lasse Collin. + bad-1-lzma2-4.lzma has two LZMA2 chunks, of which the first is + uncompressed and the second is LZMA. The first chunk resets dictionary + as it should, but the second chunk tries to reset state without + specifying properties for LZMA. - malicious-single-subblock-256MiB.lzma is a tiny file that produces - 256 MiB of output. It uses Subblock filter's run-length encoding - to achieve this. + bad-1-lzma2-5.lzma is like bad-1-lzma2-4.lzma but doesn't try to reset + anything in the header of the second chunk. - malicious-single-subblock-64PiB.lzma is a tiny file that produces - 64 PiB of output (if you have patience to wait). This is done by - chaining two Subblock filters and using their run-length encoders. + bad-1-lzma2-6.lzma has reserved LZMA2 control byte value (0x03). - malicious-multi-metadata-64PiB.lzma is like - malicious-single-subblock-64PiB.lzma but the huge amount of output - is in a Metadata Block. Trying to decode this file may take years - unless the decoder catches that the Metadata has unreasonable size. + bad-1-lzma2-7.lzma has EOPM at LZMA level. diff --git a/tests/files/bad-0-backward_size.lzma b/tests/files/bad-0-backward_size.lzma Binary files differnew file mode 100644 index 00000000..07c4695a --- /dev/null +++ b/tests/files/bad-0-backward_size.lzma diff --git a/tests/files/bad-0-empty-truncated.lzma b/tests/files/bad-0-empty-truncated.lzma Binary files differnew file mode 100644 index 00000000..15b6fe36 --- /dev/null +++ b/tests/files/bad-0-empty-truncated.lzma diff --git a/tests/files/bad-0-nonempty_index.lzma b/tests/files/bad-0-nonempty_index.lzma Binary files differnew file mode 100644 index 00000000..2a612c61 --- /dev/null +++ b/tests/files/bad-0-nonempty_index.lzma diff --git a/tests/files/bad-0cat-alone.lzma b/tests/files/bad-0cat-alone.lzma Binary files differnew file mode 100644 index 00000000..650c67f0 --- /dev/null +++ b/tests/files/bad-0cat-alone.lzma diff --git a/tests/files/bad-0catpad-empty.lzma b/tests/files/bad-0catpad-empty.lzma Binary files differnew file mode 100644 index 00000000..33892a24 --- /dev/null +++ b/tests/files/bad-0catpad-empty.lzma diff --git a/tests/files/bad-0pad-empty.lzma b/tests/files/bad-0pad-empty.lzma Binary files differnew file mode 100644 index 00000000..c5b985c0 --- /dev/null +++ b/tests/files/bad-0pad-empty.lzma diff --git a/tests/files/bad-1-block_header-1.lzma b/tests/files/bad-1-block_header-1.lzma Binary files differnew file mode 100644 index 00000000..a68119ff --- /dev/null +++ b/tests/files/bad-1-block_header-1.lzma diff --git a/tests/files/bad-1-block_header-2.lzma b/tests/files/bad-1-block_header-2.lzma Binary files differnew file mode 100644 index 00000000..7a2eb5e4 --- /dev/null +++ b/tests/files/bad-1-block_header-2.lzma diff --git a/tests/files/bad-1-block_header-3.lzma b/tests/files/bad-1-block_header-3.lzma Binary files differnew file mode 100644 index 00000000..801a05c1 --- /dev/null +++ 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00000000..0296e5ff --- /dev/null +++ b/tests/files/bad-1-lzma2-1.lzma diff --git a/tests/files/bad-1-lzma2-2.lzma b/tests/files/bad-1-lzma2-2.lzma Binary files differnew file mode 100644 index 00000000..faefa1b4 --- /dev/null +++ b/tests/files/bad-1-lzma2-2.lzma diff --git a/tests/files/bad-1-lzma2-3.lzma b/tests/files/bad-1-lzma2-3.lzma Binary files differnew file mode 100644 index 00000000..fbe3297f --- /dev/null +++ b/tests/files/bad-1-lzma2-3.lzma diff --git a/tests/files/bad-1-lzma2-4.lzma b/tests/files/bad-1-lzma2-4.lzma Binary files differnew file mode 100644 index 00000000..ef0dc491 --- /dev/null +++ b/tests/files/bad-1-lzma2-4.lzma diff --git a/tests/files/bad-1-lzma2-5.lzma b/tests/files/bad-1-lzma2-5.lzma Binary files differnew file mode 100644 index 00000000..797b7d35 --- /dev/null +++ b/tests/files/bad-1-lzma2-5.lzma diff --git a/tests/files/bad-1-lzma2-6.lzma b/tests/files/bad-1-lzma2-6.lzma Binary files differnew file mode 100644 index 00000000..73db5bff --- /dev/null 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