教你用Python提取Chrome浏览器保存的密码

Posted 2021-06-27 刘润森！

@Author：Runsen

由于Chrome会将大量浏览数据本地保存磁盘中，在本教程中，我们将编写 Python 代码来提取 Windows 计算机上 Chrome 中保存的密码。

首先，让我们安装所需的库：

pip install pycryptodome pypiwin32

打开一个新的 Python 文件，并导入必要的模块：

import os
import json
import base64
import sqlite3
import win32crypt
from Crypto.Cipher import AES
import shutil
from datetime import timezone, datetime, timedelta

在直接进入提取 chrome密码之前，我们需要定义一些有用的函数来帮助我们在主函数中。

def get_chrome_datetime(chromedate):
    """从chrome格式的datetime返回一个`datetime.datetime`对象
因为'chromedate'的格式是1601年1月以来的微秒数"""
    return datetime(1601, 1, 1) + timedelta(microseconds=chromedate)

def get_encryption_key():
    local_state_path = os.path.join(os.environ["USERPROFILE"],"AppData", "Local", "Google", "Chrome","User Data", "Local State")
    with open(local_state_path, "r", encoding="utf-8") as f:
        local_state = f.read()
        local_state = json.loads(local_state)

    # 从Base64解码加密密钥
    key = base64.b64decode(local_state["os_crypt"]["encrypted_key"])
    # 删除 DPAPI str
    key = key[5:]
    # 返回最初加密的解密密钥
    # 使用从当前用户的登录凭据派生的会话密钥
    # 官方文档doc: http://timgolden.me.uk/pywin32-docs/win32crypt.html
    return win32crypt.CryptUnprotectData(key, None, None, None, 0)[1]


def decrypt_password(password, key):
    try:
        # 获取初始化向量
        iv = password[3:15]
        password = password[15:]
        # 生成密码
        cipher = AES.new(key, AES.MODE_GCM, iv)
        # 解密密码
        return cipher.decrypt(password)[:-16].decode()
    except:
        try:
            return str(win32crypt.CryptUnprotectData(password, None, None, None, 0)[1])
        except:
            # not supported
            return ""

• get_chrome_datetime()函数负责将 chrome 日期格式转换为人类可读的日期时间格式。

• get_encryption_key()函数提取并解码用于加密密码的AES密钥，这"%USERPROFILE%\\AppData\\Local\\Google\\Chrome\\User Data\\Local State"作为 JSON 文件存储在路径中

• decrypt_password() 将加密密码和 AES 密钥作为参数，并返回密码的解密版本。

下面是main主要功能：

def main():
    # 获取AES密钥
    key = get_encryption_key()
    # 本地sqlite Chrome数据库路径
    db_path = os.path.join(os.environ["USERPROFILE"], "AppData", "Local","Google", "Chrome", "User Data", "default", "Login Data")
    # 将文件复制到其他位置
    # 因为如果chrome当前正在运行，数据库将被锁定
    filename = "ChromeData.db"
    shutil.copyfile(db_path, filename)
    # 连接数据库
    db = sqlite3.connect(filename)
    cursor = db.cursor()
    # 登录表中有我们需要的数据
    cursor.execute("select origin_url, action_url, username_value, password_value, date_created, date_last_used from logins order by date_created")
    # iterate over all rows
    for row in cursor.fetchall():
        origin_url = row[0]
        action_url = row[1]
        username = row[2]
        password = decrypt_password(row[3], key)
        date_created = row[4]
        date_last_used = row[5]        
        if username or password:
            print(f"Origin URL: {origin_url}")
            print(f"Action URL: {action_url}")
            print(f"Username: {username}")
            print(f"Password: {password}")
        else:
            continue
        if date_created != 86400000000 and date_created:
            print(f"Creation date: {str(get_chrome_datetime(date_created))}")
        if date_last_used != 86400000000 and date_last_used:
            print(f"Last Used: {str(get_chrome_datetime(date_last_used))}")
        print("="*50)
    cursor.close()
    db.close()
    try:
        # 尝试删除复制的db文件
        os.remove(filename)
    except:
        pass

首先，我们使用之前定义的get_encryption_key()函数获取加密密钥，然后我们将 sqlite 数据库（位于"%USERPROFILE%\\AppData\\Local\\Google\\Chrome\\User Data\\default\\Login Data"保存密码的位置）复制到当前目录并连接到它，这是因为原始数据库文件将被锁定Chrome 当前正在运行。

之后，我们对登录表进行选择查询并遍历所有登录行，我们还解密每个密码date_created并将date_last_used日期时间重新格式化为更易于阅读的格式。

最后，我们打印凭据并从当前目录中删除数据库副本。

让我们调用主函数，完美提取Chrome浏览器保存的密码：

完整代码

import os
import json
import base64
import sqlite3
import win32crypt
from Crypto.Cipher import AES
import shutil
from datetime import  datetime, timedelta

def get_chrome_datetime(chromedate):
    """从chrome格式的datetime返回一个`datetime.datetime`对象
因为'chromedate'的格式是1601年1月以来的微秒数"""
    return datetime(1601, 1, 1) + timedelta(microseconds=chromedate)

def get_encryption_key():
    local_state_path = os.path.join(os.environ["USERPROFILE"],
                                    "AppData", "Local", "Google", "Chrome",
                                    "User Data", "Local State")
    with open(local_state_path, "r", encoding="utf-8") as f:
        local_state = f.read()
        local_state = json.loads(local_state)

    key = base64.b64decode(local_state["os_crypt"]["encrypted_key"])
   
    key = key[5:]
    
    return win32crypt.CryptUnprotectData(key, None, None, None, 0)[1]


def decrypt_password(password, key):
    try:
        iv = password[3:15]
        password = password[15:]
        cipher = AES.new(key, AES.MODE_GCM, iv)
        return cipher.decrypt(password)[:-16].decode()
    except:
        try:
            return str(win32crypt.CryptUnprotectData(password, None, None, None, 0)[1])
        except:
            # not supported
            return ""


def main():
    key = get_encryption_key()
    db_path = os.path.join(os.environ["USERPROFILE"], "AppData", "Local",
                            "Google", "Chrome", "User Data", "default", "Login Data")
    filename = "ChromeData.db"
    shutil.copyfile(db_path, filename)
    db = sqlite3.connect(filename)
    cursor = db.cursor()
    cursor.execute("select origin_url, action_url, username_value, password_value, date_created, date_last_used from logins order by date_created")
    # iterate over all rows
    for row in cursor.fetchall():
        origin_url = row[0]
        action_url = row[1]
        username = row[2]
        password = decrypt_password(row[3], key)
        date_created = row[4]
        date_last_used = row[5]        
        if username or password:
            print(f"Origin URL: {origin_url}")
            print(f"Action URL: {action_url}")
            print(f"Username: {username}")
            print(f"Password: {password}")
        else:
            continue
        if date_created != 86400000000 and date_created:
            print(f"Creation date: {str(get_chrome_datetime(date_created))}")
        if date_last_used != 86400000000 and date_last_used:
            print(f"Last Used: {str(get_chrome_datetime(date_last_used))}")
        print("="*50)

    cursor.close()
    db.close()
    try:
        # try to remove the copied db file
        os.remove(filename)
    except:
        pass


if __name__ == "__main__":
    main()