mirror of
https://github.com/hakril/PythonForWindows
synced 2026-06-08 14:31:45 +00:00
hakril
84 lines
2.9 KiB
Python
84 lines
2.9 KiB
Python
import ctypes
|
|
|
|
from windows import winproxy
|
|
import windows.generated_def as gdef
|
|
import windows.crypto
|
|
|
|
class CryptMessage(gdef.HCRYPTMSG):
|
|
"""Represent a PKCS #7 message
|
|
(see `Low-level Message Functions <https://msdn.microsoft.com/en-us/library/windows/desktop/aa380252(v=vs.85).aspx#low_level_message_functions>`_)
|
|
"""
|
|
MSG_PARAM_KNOW_TYPES = {gdef.CMSG_SIGNER_INFO_PARAM: gdef.CMSG_SIGNER_INFO,
|
|
gdef.CMSG_SIGNER_COUNT_PARAM: gdef.DWORD,
|
|
gdef.CMSG_CERT_COUNT_PARAM: gdef.DWORD}
|
|
|
|
|
|
def get_param(self, param_type, index=0, raw=False):
|
|
data_size = gdef.DWORD()
|
|
# https://msdn.microsoft.com/en-us/library/windows/desktop/aa380227(v=vs.85).aspx
|
|
winproxy.CryptMsgGetParam(self, param_type, index, None, data_size)
|
|
buffer = ctypes.c_buffer(data_size.value)
|
|
winproxy.CryptMsgGetParam(self, param_type, index, buffer, data_size)
|
|
if raw:
|
|
return (buffer, data_size)
|
|
|
|
if param_type in self.MSG_PARAM_KNOW_TYPES:
|
|
buffer = self.MSG_PARAM_KNOW_TYPES[param_type].from_buffer(buffer)
|
|
if isinstance(buffer, gdef.DWORD): # DWORD -> return the Python int
|
|
return buffer.value
|
|
return buffer
|
|
|
|
# Certificate accessors
|
|
|
|
@property
|
|
def nb_cert(self):
|
|
"""The number of certificate embded in the :class:`CryptObject`
|
|
|
|
:type: :class:`int`
|
|
"""
|
|
return self.get_param(gdef.CMSG_CERT_COUNT_PARAM)
|
|
|
|
def get_raw_cert(self, index=0):
|
|
return self.get_param(gdef.CMSG_CERT_PARAM, index)
|
|
|
|
def get_cert(self, index=0):
|
|
"""Return embded :class:`Certificate` number ``index``.
|
|
|
|
.. note::
|
|
|
|
Not all embded certificate are directly used to sign the :class:`CryptObject`.
|
|
"""
|
|
return windows.crypto.Certificate.from_buffer(self.get_raw_cert(index))
|
|
|
|
@property
|
|
def certs(self):
|
|
"""The list of :class:`Certificate` embded in the message"""
|
|
return [self.get_cert(i) for i in range(self.nb_cert)]
|
|
|
|
# Signers accessors
|
|
|
|
@property
|
|
def nb_signer(self):
|
|
"""The number of signers for the CryptObject
|
|
|
|
:type: :class:`int`
|
|
"""
|
|
try:
|
|
return self.get_param(gdef.CMSG_SIGNER_COUNT_PARAM)
|
|
except WindowsError as e:
|
|
if (e.winerror & 0xffffffff) == gdef.CRYPT_E_INVALID_MSG_TYPE:
|
|
return 0
|
|
raise
|
|
|
|
|
|
def get_signer_data(self, index=0):
|
|
"""Returns the signer informations for signer nb ``index``
|
|
|
|
:return: :class:`~windows.generated_def.winstructs.CMSG_SIGNER_INFO`
|
|
"""
|
|
return self.get_param(gdef.CMSG_SIGNER_INFO_PARAM, index)
|
|
|
|
@property
|
|
def signers(self):
|
|
"""The list of :class:`~windows.generated_def.winstructs.CMSG_SIGNER_INFO` embed in the message"""
|
|
return [self.get_signer_data(i) for i in range(self.nb_signer)] |