| commit | 2f8c6327151f4aa82ca5ddf7f870f844a564f668 | [log] [tgz] |
|---|---|---|
| author | Amin Hassani <ahassani@google.com> | Wed Apr 11 13:22:10 2018 -0700 |
| committer | Amin Hassani <ahassani@google.com> | Thu Apr 12 10:03:40 2018 -0700 |
| tree | e44074cae3aa2b7821c155f0797598985fbfde61 | |
| parent | bc7af4890007c454f62f9bf32015bfbb90ac3b08 [diff] |
Check deflate extents in PuffinStream Currently PuffinStream does not check if the passed array of deflate extents fit into the source deflate stream. This patch adds that extra check. This bug was found by the puffin_fuzzer. Bug: crbug.com/830154 Bug: crbug.com/830201 Test: unittest Test: corpus Change-Id: I02f5d3cf9cdd38f9884dc9017a4e9985e0eb6c67
Source code for Puffin: A utility for deterministic DEFLATE recompression.
TODO(ahassani): Describe the directory structure and how-tos.
Alphabet A value that occurs in the input stream. It can be either a literal:[0..255], and end of block sign [256], a length[257..285], or a distance [0..29].
Huffman code A variable length code representing the Huffman encoded of an alphabet. Huffman codes can be created uniquely using Huffman code length array.
Huffman code array An array which an array index identifies a Huffman code and the array element in that index represents the corresponding alphabet. Throughout the code, Huffman code arrays are identified by vectors with postfix hcodes_.
Huffman reverse code array An array which an array index identifies an alphabet and the array element in that index contains the Huffman code of the alphabet. Throughout the code, The Huffman reverse code arrays are identified by vectors with postfix rcodes_.
Huffman code length The number of bits in a Huffman code.
Huffman code length array An array of Huffman code lengths with the array index as the alphabet. Throughout the code, Huffman code length arrays are identified by vectors with postfix lens_.