從 SID 獲取用戶名的 Python ldap3 代碼

Question

我在共享 Windows 服務器上有一個用戶的 SID 字符串（例如，“S-1-5-21-500000003-1000000000-1000000003-1001”），我需要獲取相關的用戶名。

我想這可以通過以下方式實現：

1. 將 SID 字符串轉換為字節數組。
2. 使用合適的ldpa查詢來獲取相關用戶名。

但是我沒有找到如何做到這一點的准確可靠的說明（以這種方式或另一種方式）。

我會感謝任何有用的指南，特別是如果它帶有演示 Python ( ldap3 ) 代碼。

Answer 1

您必須具有二進制格式的 SID，然后嘗試：

from ldap3 import Server, Connection, ALL
from ldap3.utils.conv import escape_bytes

s = Server('my_server', get_info=ALL)
c = Connection(s, 'my_user', 'my_password')
c.bind()

binary_sid = b'....'  # your sid must be in binary format

c.search('my_base', '(objectsid=' + escape_bytes(binary_sid) + ')', attributes=['objectsid', 'samaccountname'])
print(c.entries)

您應該在 c.entries[0].sAMAccountName 中獲取帳戶名稱

Answer 2

def unsigned_number_to_slashed_byte_array_string(number, little_endian, digits_count):
        """
        Convert given unsigned number into a string that represents it as a sequence of bytes in given order (either little or big Endian).
        In case the total number of digits in the string is greater than given digits count, the string is left-padded with zeroes.
        Each such byte is represented by a substring that's composed of a preceding slash character followed by two (uppercase) hexadecimal digits (e.g., "\\0A").
        :param number: An unsigned non-negative integer.
        :param little_endian: A flag that says whether little Endian order is requested; otherwise, big Endian order is selected.
        :param digits_count: The total count of hexadecimal digits in the resulting possibly left-padded string, which is twice the number of bytes.
        :except ValueError: In case given number isn't a non-negative number, or given digits count isn't a positive even number.
        :return: A string that represents given number as a sequence of bytes in given order.
        """
        if number < 0: raise ValueError("{0}: Argument number must be a non-negative! ({1})".format(func_name(), number))
        if (digits_count <= 0) or ((digits_count % 2) != 0): raise ValueError("{0}: Argument digits_count must be an even positive! ({1})".format(func_name(), digits_count))

        zero_padded_hex_number_str = "{0:0{1}X}".format(number, digits_count) # Format: no leading "0x", zero-padded digits_count digits (or half digits_count bytes), uppercase hexadecimal letters.
        number_byte_array_str = ""
        byte_starter_digits_indices_list = range(len(zero_padded_hex_number_str))[::2]
        if little_endian: byte_starter_digits_indices_list = reversed(byte_starter_digits_indices_list)
        for byte_starter_digit_index in byte_starter_digits_indices_list:
            number_byte_array_str = "{0}\\{1}".format(number_byte_array_str, zero_padded_hex_number_str[byte_starter_digit_index:(byte_starter_digit_index + 2)])
        return number_byte_array_str


def sid_str_to_byte_array_str(sid_str):
    """
    :param sid_str: An active-directory SID string (e.g., "S-1-5-21-1241979920-1440912824-1533017923-1106").
    :return: A string that represents given SID string as a byte array string (e.g., "\\01\\05\\00\\00\\00\\00\\00\\05\\15\\00\\00\\00\\10\\1C\\07\\4A\\B8\\95\\E2\\55\\43\\FF\\5F\\5B").
    """
    dashes_count = sid_str.count("-")
    sid_numbers_str = sid_str[2:] # Removes the preceding "S-"
    sid_number_strings = sid_numbers_str.split("-")
    sid_numbers = [int(sid_number_string) for sid_number_string in sid_number_strings]
    sid_byte_array_str  = unsigned_number_to_slashed_byte_array_string(sid_numbers[0],       True,   2)
    sid_byte_array_str += unsigned_number_to_slashed_byte_array_string((dashes_count - 2),   True,   2)
    sid_byte_array_str += unsigned_number_to_slashed_byte_array_string(sid_numbers[1],       False, 12)
    sid_byte_array_str += unsigned_number_to_slashed_byte_array_string(sid_numbers[2],       True,   8)
    sid_byte_array_str += unsigned_number_to_slashed_byte_array_string(sid_numbers[3],       True,   8)
    sid_byte_array_str += unsigned_number_to_slashed_byte_array_string(sid_numbers[4],       True,   8)
    sid_byte_array_str += unsigned_number_to_slashed_byte_array_string(sid_numbers[5],       True,   8)
    return sid_byte_array_str