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我正在尝试使用 ctypes API 读取 Windows Credential vault,但我不确定如何将函数结果转换回可用的 ctypes.Structure。

import ctypes
class CREDENTIALS(ctypes.Structure):
    _fields_ = [
        ("Flags", ctypes.c_int),
        ("Type", ctypes.c_int),
        ("TargetName", ctypes.c_wchar_p),
        ("Comment", ctypes.c_wchar_p),
        ("CredentialBlobSize", ctypes.c_int),
        ("CredentialBlob", ctypes.c_wchar_p),
        ("AttributeCount", ctypes.c_int),
        ("Attributes", ctypes.c_wchar_p),
        ("TargetAlias", ctypes.c_wchar_p),
        ("UserName", ctypes.c_wchar_p)
]
advapi32 = ctypes.oledll.LoadLibrary('Advapi32.dll')
advapi32.CredReadW.restype = ctypes.c_bool
advapi32.CredReadW.argtypes = [ctypes.c_wchar_p, ctypes.c_int, ctypes.c_int, ctypes.POINTER(CREDENTIALS)]
target = "login.example.com"
pcred = ctypes.pointer(CREDENTIALS())
ok = advapi32.CredReadW(target,1,0,pcred)
cred = pcred.contents
print ok, pcred, cred.UserName, cred.CredentialBlob

结果:

1 <__main__.LP_CREDENTIALS object at 0x012CECB0> None None

该函数返回 true ,因此它可以工作,但指针内容似乎是空白的。我究竟做错了什么?

4

1 回答 1

3

oledll应该是windlloledll用于返回的函数HRESULT

的定义CREDENTIAL缺少一些字段(LastWrittenPersist)。定义(链接)是:

typedef struct _CREDENTIAL {
  DWORD                 Flags;
  DWORD                 Type;
  LPTSTR                TargetName;
  LPTSTR                Comment;
  FILETIME              LastWritten;
  DWORD                 CredentialBlobSize;
  LPBYTE                CredentialBlob;
  DWORD                 Persist;
  DWORD                 AttributeCount;
  PCREDENTIAL_ATTRIBUTE Attributes;
  LPTSTR                TargetAlias;
  LPTSTR                UserName;
} CREDENTIAL, *PCREDENTIAL;
于 2014-11-23T10:04:32.603 回答