This module contains several utilities for working with Google Chrome extension files (CRXs), which have the *.crx file extension. The goal of this project is to mimic as closely as possible the functionality of Google Chrome when these extensions are unpacked and installed.
Documentation
Please view the full documentation for this project on Read the Docs.
Installation
Since crx_unpack is available on PyPI, you can install it using pip:
$ pip install crx_unpack
Structure of CRX Package Format
The information in this section introduces the structure and contents of CRX files.
As explained at https://developer.chrome.com/extensions/crx
Package Header
The header contains the author’s public key and the extension’s signature. The signature is generated from the ZIP file using SHA-1 with the author’s private key. The header requires a little-endian byte ordering with 4-byte alignment. The following table describes the fields of the .crx header in order:
Field |
Type |
Length |
Value |
Description |
|---|---|---|---|---|
magic number |
char[] |
32 bits |
Cr24 |
Chrome requires this constant at the beginning of every .crx package. |
version |
unsigned int |
32 bits |
2 |
The version of the *.crx file format used (currently 2). |
public key length |
unsigned int |
32 bits |
pubkey.length |
The length of the RSA public key in bytes. |
signature length |
unsigned int |
32 bits |
sig.length |
The length of the signature in bytes. |
public key |
byte[] |
pubkey.length |
pubkey.contents |
The contents of the author’s RSA public key formatted as an X509 SubjectPublicKeyInfo block. |
signature |
byte[] |
sig.length |
sig.contents |
The signature of the ZIP content using the author’s private key. The signature is created using the RSA algorithm with the SHA-1 hash function. |
Extension Contents
The extension’s ZIP file is appended to the *.crx package after the header. This should be the same ZIP file that the signature in the header was generated from.
1 maintainer
Metadata
1 maintainer
Release files for crx-unpack 0.1.4
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| crx_unpack-0.1.4.tar.gz | 13.3 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| crx_unpack-0.1.4-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 28.9 kB
Release files / crx_unpack-0.1.4.tar.gz
| Download URL | crx_unpack-0.1.4.tar.gz |
|---|---|
| Size | 13.3 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
c62fe369287f563b09a1a1745dcfe3bf852d6c9b9869fe8a8bdab218b9b9aab5
|
|
BLAKE2b-256 checksum How to use checksums |
87de32d51020e0f931c2cdba1a868ac4e624686789e8108e0940a98ed776b62a
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
Release files / crx_unpack-0.1.4-py3-none-any.whl
| Download URL | crx_unpack-0.1.4-py3-none-any.whl |
|---|---|
| Size | 15.6 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
8bb328491cf077d05f8ca34dfff02bc653ada7787a7d5772675714353651e977
|
|
BLAKE2b-256 checksum How to use checksums |
e5ee07b45a1260c97939760cbe9cb16cbefa01f3a701f3cea747de7779b44312
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
