How to programmatically calculate Chrome extension ID?

Question

I\'m building an automated process to produce extensions. Is there a code example of calculating the extension-ID directly and entirely bypassing interaction with the browse

Answer 1

Starting with Chrome 64, Chrome changed the package format for extensions to the CRX₃ file format, which supports multiple signatures and explicitly declares its CRX ID. Extracting the CRX ID from a CRX₃ file requires parsing a protocol buffer.

Here is a small python script for extracting the ID from a CRX₃ file. This solution should only be used with trusted CRX₃ files or in contexts where security is not a concern: unlike CRX₂, the package format does not restrict what CRX ID a CRX₃ file declares. (In practice, consumers of the file (i.e. Chrome) will place restrictions upon it, such as requiring the file to be signed with at least one key that hashes to the declared CRX ID).

import binascii
import string
import struct
import sys

def decode(proto, data):
    index = 0
    length = len(data)
    msg = dict()
    while index < length:
        item = 128
        key = 0
        left = 0
        while item & 128:
            item = data[index]
            index += 1
            value = (item & 127) << left
            key += value
            left += 7
        field = key >> 3
        wire = key & 7
        if wire == 0:
            item = 128
            num = 0
            left = 0
            while item & 128:
                item = data[index]
                index += 1
                value = (item & 127) << left
                num += value
                left += 7
            continue
        elif wire == 1:
            index += 8
            continue
        elif wire == 2:
            item = 128
            _length = 0
            left = 0
            while item & 128:
                item = data[index]
                index += 1
                value = (item & 127) << left
                _length += value
                left += 7
            last = index
            index += _length
            item = data[last:index]
            if field not in proto:
                continue
            msg[proto[field]] = item
            continue
        elif wire == 5:
            index += 4
            continue
        raise ValueError(
            'invalid wire type: {wire}'.format(wire=wire)
        )
    return msg

def get_extension_id(crx_file):
    with open(crx_file, 'rb') as f:
      f.read(8); # 'Cr24\3\0\0\0'
      data = f.read(struct.unpack('

(Thanks to https://github.com/thelinuxkid/python-protolite for the protobuf parser skeleton.)