在Python中使用DPAPI？

Question

有没有办法在Windows XP上使用Python的DPAPI(数据保护应用程序编程接口)？

如果有一个可以做到的话,我更愿意使用现有的模块.很遗憾,我无法找到Google或Stack Overflow的方法.

编辑:我已经采用了"dF"指向的示例代码,并将其调整为一个独立的库,可以在高级别使用,只需在用户模式下使用DPAPI进行加密和解密.只需调用返回加密字符串的dpapi.cryptData(text_to_encrypt)或返回纯文本的反向decryptData(encrypted_data_string).这是图书馆:

# DPAPI access library
# This file uses code originally created by Crusher Joe:
# http://article.gmane.org/gmane.comp.python.ctypes/420
#

from ctypes import *
from ctypes.wintypes import DWORD

LocalFree = windll.kernel32.LocalFree
memcpy = cdll.msvcrt.memcpy
CryptProtectData = windll.crypt32.CryptProtectData
CryptUnprotectData = windll.crypt32.CryptUnprotectData
CRYPTPROTECT_UI_FORBIDDEN = 0x01
extraEntropy = "cl;ad13 \0al;323kjd #(adl;k$#ajsd"

class DATA_BLOB(Structure):
    _fields_ = [("cbData", DWORD), ("pbData", POINTER(c_char))]

def getData(blobOut):
    cbData = int(blobOut.cbData)
    pbData = blobOut.pbData
    buffer = c_buffer(cbData)
    memcpy(buffer, pbData, cbData)
    LocalFree(pbData);
    return buffer.raw

def Win32CryptProtectData(plainText, entropy):
    bufferIn = c_buffer(plainText, len(plainText))
    blobIn = DATA_BLOB(len(plainText), bufferIn)
    bufferEntropy = c_buffer(entropy, len(entropy))
    blobEntropy = DATA_BLOB(len(entropy), bufferEntropy)
    blobOut = DATA_BLOB()

    if CryptProtectData(byref(blobIn), u"python_data", byref(blobEntropy),
                       None, None, CRYPTPROTECT_UI_FORBIDDEN, byref(blobOut)):
        return getData(blobOut)
    else:
        return ""

def Win32CryptUnprotectData(cipherText, entropy):
    bufferIn = c_buffer(cipherText, len(cipherText))
    blobIn = DATA_BLOB(len(cipherText), bufferIn)
    bufferEntropy = c_buffer(entropy, len(entropy))
    blobEntropy = DATA_BLOB(len(entropy), bufferEntropy)
    blobOut = DATA_BLOB()
    if CryptUnprotectData(byref(blobIn), None, byref(blobEntropy), None, None,
                              CRYPTPROTECT_UI_FORBIDDEN, byref(blobOut)):
        return getData(blobOut)
    else:
        return ""

def cryptData(text):
    return Win32CryptProtectData(text, extraEntropy)

def decryptData(cipher_text):
    return Win32CryptUnprotectData(cipher_text, extraEntropy)

Answer 1

我一直在使用CryptProtectData和CryptUnprotectData通过ctypes,代码来自

http://article.gmane.org/gmane.comp.python.ctypes/420

它一直运作良好.

Answer 2

此外，pywin32 在 win32crypt 模块中实现了 CryptProtectData 和 CryptUnprotectData。