Python 提取 Chrome 本地保存的密码

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import os
import json
import base64
import sqlite3
import shutil
import winreg
from time import perf_counter
from win32crypt import CryptUnprotectData
from cryptography.hazmat.primitives.ciphers.aead import AESGCM


def get_desktop():
    key = winreg.OpenKey(winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders')
    return winreg.QueryValueEx(key, "Desktop")[0]


def get_string(local_state):
    with open(local_state, 'r', encoding='utf-8') as f:
        s = json.load(f)['os_crypt']['encrypted_key']
    return s


def pull_the_key(base64_encrypted_key):
    encrypted_key_with_header = base64.b64decode(base64_encrypted_key)
    encrypted_key = encrypted_key_with_header[5:]
    key = CryptUnprotectData(encrypted_key, None, None, None, 0)[1]
    return key


def decrypt_string(key, data):
    nonce, cipherbytes = data[3:15], data[15:]
    aesgcm = AESGCM(key)
    plainbytes = aesgcm.decrypt(nonce, cipherbytes, None)
    plaintext = plainbytes.decode('utf-8')
    return plaintext


def get_password_from_chrome():
    local_state = os.environ['LOCALAPPDATA'] + r'\Google\Chrome\User Data\Local State'
    origin_file = os.path.join(os.environ['LOCALAPPDATA'], r'Google\Chrome\User Data\Default\Login Data')

    tmp_file = os.path.join(os.environ['LOCALAPPDATA'], 'chrome_password.db')
    if os.path.exists(tmp_file):
        os.remove(tmp_file)
    shutil.copyfile(origin_file, tmp_file)
    pwd_text = "网站,帐号,密码\n"
    sql = "select signon_realm,username_value,password_value from logins"
    with sqlite3.connect(tmp_file) as conn:
        cu = conn.cursor()
        res = cu.execute(sql).fetchall()
        cu.close()
        key = pull_the_key(get_string(local_state))
        for signon_realm, username_value, password_value in res:
            if password_value[0:3] == b'v10':
                password = decrypt_string(key, password_value)
            else:
                password = CryptUnprotectData(password_value)[1].decode()
            pwd_text += '"%s","%s","%s"\n' % (signon_realm, username_value, password)
    conn.close()
    os.remove(tmp_file)

    filename = os.path.join(get_desktop(), r'chrome_password.csv')
    with open(filename, 'w') as f:
        f.write(pwd_text)


if __name__ == "__main__":
    start = perf_counter()
    get_password_from_chrome()
    elapsed = perf_counter() - start
    print(f"已将 Chrome 中保存的密码提取到桌面的 chrome_password.csv 文件\n用时 {elapsed} 秒")

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$ pip install pywin32 cryptography
$ python ./get_pwd_from_chrome.py

已将 Chrome 中保存的密码提取到桌面的 chrome_password.csv 文件
用时 0.04970019999999997 秒