Remove the backdoor found in 5.6.0 and 5.6.1 (CVE-2024-3094). · tukaani-project/xz@e93e13c

good-0catpad-empty.xz has two zero-Block Streams concatenated with

four-byte Stream Padding between the Streams.

good-2cat.xz has two Streams with one Block each.

good-1-check-none.xz has one Stream with one Block with two

uncompressed LZMA2 chunks and no integrity check.

good-1-arm64-lzma2-2.xz is like good-1-arm64-lzma2-1.xz but with

non-zero start offset. XZ Embedded doesn't support this file.

good-1-riscv-lzma2-1.xz uses the RISC-V filter and LZMA2. The

uncompressed data is constructed so it tests all of the instructions

that should be encoded and a few that should not. Additionally, the

file contains random bytes to help test unforeseen corner cases.

good-1-riscv-lzma2-2.xz is like good-1-riscv-lzma2-1.xz but with

non-zero start offset. XZ Embedded doesn't support this file.

good-1-lzma2-1.xz has two LZMA2 chunks, of which the second sets

new properties.

Uncompressed Size bytes of output will have been produced but

the LZMA2 decoder doesn't indicate end of stream.

bad-3-corrupt_lzma2.xz has three Streams in it. The first and third

streams are valid xz Streams. The middle Stream has a correct Stream

Header, Block Header, Index and Stream Footer. Only the LZMA2 data

is corrupt. This file should decompress if --single-stream is used.

3. Descriptions of Individual .lzma Files

will give an error at the end of the file after producing the

correct uncompressed output.

good-small_compressed.lzma was created with a small dictionary (2^16).

It contains the string "Hello World" repeated 100,000 times. This tests

match decoding and wrapping the dictionary.

good-large_compressed.lzma was created with a mix of repeated

characters and random data to test a data stream containing many

matches and many literals.

3.2. Bad Files

bad-too_small_size-without_eopm-3.lzma is like -1 above but instead

of a literal the problem occurs in the middle of a match.

bad-dict_size.lzma has a valid dictionary size according to the .lzma

File Format, but will be rejected by XZ Utils because it is not 2^n or

2^n + 2^(n-1).

4. Descriptions of Individual .lz (lzip) Files