830 lines
28 KiB
Python
830 lines
28 KiB
Python
# OpenSSL library wrapper: provide access to both OpenSSL dynamic libraries
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# through ctypes.
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# Copyright 2012 Ray Brown
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# The License is also distributed with this work in the file named "LICENSE."
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""OpenSSL Wrapper
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This module provides run-time access to the OpenSSL cryptographic and
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protocols libraries. It is designed for use with "from openssl import *". For
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this reason, the module variable __all__ contains all of this module's
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integer constants, OpenSSL library functions, and wrapper functions.
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Constants and functions are not documented here. See the OpenSSL library
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documentation.
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Exceptions:
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OpenSSLError -- exception raised when errors occur in the OpenSSL library
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"""
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import sys
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import array
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import socket
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from logging import getLogger
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from os import path
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from datetime import timedelta
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from err import openssl_error
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from err import SSL_ERROR_NONE
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from util import _BIO
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import ctypes
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from ctypes import CDLL
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from ctypes import CFUNCTYPE
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from ctypes import c_void_p, c_int, c_long, c_uint, c_ulong, c_char_p, c_size_t
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from ctypes import c_short, c_ushort, c_ubyte, c_char
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from ctypes import byref, POINTER, addressof
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from ctypes import Structure, Union
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from ctypes import create_string_buffer, sizeof, memmove, cast
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#
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# Module initialization
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#
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_logger = getLogger(__name__)
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#
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# Library loading
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#
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if sys.platform.startswith('win'):
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dll_path = path.abspath(path.dirname(__file__))
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debug_cryptodll_path = path.join(dll_path, "cygcrypto-1.0.0.dll")
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debug_ssldll_path = path.join(dll_path, "cygssl-1.0.0.dll")
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release_cryptodll_path = path.join(dll_path, "libeay32.dll")
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release_ssldll_path = path.join(dll_path, "ssleay32.dll")
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if path.exists(path.join(dll_path, "use_debug_openssl")) and \
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path.exists(debug_cryptodll_path) and \
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path.exists(debug_ssldll_path):
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libcrypto = CDLL(debug_cryptodll_path)
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libssl = CDLL(debug_ssldll_path)
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else:
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# If these don't exist, then let the exception propagate
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libcrypto = CDLL(release_cryptodll_path)
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libssl = CDLL(release_ssldll_path)
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else:
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libcrypto = CDLL("libcrypto.so.1.0.0")
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libssl = CDLL("libssl.so.1.0.0")
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#
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# Integer constants - exported
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#
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BIO_NOCLOSE = 0x00
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BIO_CLOSE = 0x01
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SSLEAY_VERSION = 0
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SSL_OP_NO_COMPRESSION = 0x00020000
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SSL_VERIFY_NONE = 0x00
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SSL_VERIFY_PEER = 0x01
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SSL_VERIFY_FAIL_IF_NO_PEER_CERT = 0x02
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SSL_VERIFY_CLIENT_ONCE = 0x04
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SSL_SESS_CACHE_OFF = 0x0000
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SSL_SESS_CACHE_CLIENT = 0x0001
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SSL_SESS_CACHE_SERVER = 0x0002
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SSL_SESS_CACHE_BOTH = SSL_SESS_CACHE_CLIENT | SSL_SESS_CACHE_SERVER
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SSL_SESS_CACHE_NO_AUTO_CLEAR = 0x0080
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SSL_SESS_CACHE_NO_INTERNAL_LOOKUP = 0x0100
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SSL_SESS_CACHE_NO_INTERNAL_STORE = 0x0200
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SSL_SESS_CACHE_NO_INTERNAL = \
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SSL_SESS_CACHE_NO_INTERNAL_LOOKUP | SSL_SESS_CACHE_NO_INTERNAL_STORE
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SSL_FILE_TYPE_PEM = 1
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GEN_DIRNAME = 4
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NID_subject_alt_name = 85
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CRYPTO_LOCK = 1
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#
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# Integer constants - internal
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#
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SSL_CTRL_SET_SESS_CACHE_MODE = 44
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SSL_CTRL_SET_READ_AHEAD = 41
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SSL_CTRL_OPTIONS = 32
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BIO_CTRL_INFO = 3
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BIO_CTRL_DGRAM_SET_CONNECTED = 32
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BIO_CTRL_DGRAM_GET_PEER = 46
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BIO_CTRL_DGRAM_SET_PEER = 44
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BIO_C_SET_NBIO = 102
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DTLS_CTRL_GET_TIMEOUT = 73
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DTLS_CTRL_HANDLE_TIMEOUT = 74
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DTLS_CTRL_LISTEN = 75
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X509_NAME_MAXLEN = 256
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GETS_MAXLEN = 2048
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#
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# Parameter data types
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#
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class c_long_parm(object):
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"""Long integer paramter class
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c_long must be distinguishable from c_int, as the latter is associated
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with a default error checking routine, while the former is not.
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"""
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class FuncParam(object):
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"""Function parameter or return type"""
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@classmethod
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def from_param(cls, value):
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if not isinstance(value, cls):
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_logger.error("Parameter type mismatch: %s not of type %s",
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value, cls)
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raise TypeError(repr(value) + " is not of type " + repr(cls))
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return value._as_parameter
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def __init__(self, value):
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self._as_parameter = c_void_p(value)
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def __nonzero__(self):
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return bool(self._as_parameter)
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@property
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def raw(self):
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return self._as_parameter.value
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class DTLSv1Method(FuncParam):
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def __init__(self, value):
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super(DTLSv1Method, self).__init__(value)
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class BIO_METHOD(FuncParam):
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def __init__(self, value):
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super(BIO_METHOD, self).__init__(value)
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class SSLCTX(FuncParam):
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def __init__(self, value):
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super(SSLCTX, self).__init__(value)
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class SSL(FuncParam):
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def __init__(self, value):
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super(SSL, self).__init__(value)
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class BIO(FuncParam):
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def __init__(self, value):
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super(BIO, self).__init__(value)
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class X509(FuncParam):
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def __init__(self, value):
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super(X509, self).__init__(value)
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class X509_val_st(Structure):
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_fields_ = [("notBefore", c_void_p),
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("notAfter", c_void_p)]
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class X509_cinf_st(Structure):
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_fields_ = [("version", c_void_p),
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("serialNumber", c_void_p),
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("signature", c_void_p),
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("issuer", c_void_p),
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("validity", POINTER(X509_val_st))] # remaining fields omitted
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class X509_st(Structure):
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_fields_ = [("cert_info", POINTER(X509_cinf_st),)] # remainder omitted
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class X509_name_st(Structure):
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_fields_ = [("entries", c_void_p)] # remaining fields omitted
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class ASN1_OBJECT(FuncParam):
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def __init__(self, value):
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super(ASN1_OBJECT, self).__init__(value)
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class ASN1_STRING(FuncParam):
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def __init__(self, value):
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super(ASN1_STRING, self).__init__(value)
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class ASN1_TIME(FuncParam):
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def __init__(self, value):
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super(ASN1_TIME, self).__init__(value)
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class SSL_CIPHER(FuncParam):
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def __init__(self, value):
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super(SSL_CIPHER, self).__init__(value)
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class GENERAL_NAME_union_d(Union):
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_fields_ = [("ptr", c_char_p),
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# entries omitted
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("directoryName", POINTER(X509_name_st))]
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# remaining fields omitted
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class STACK(FuncParam):
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def __init__(self, value):
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super(STACK, self).__init__(value)
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class GENERAL_NAME(Structure):
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_fields_ = [("type", c_int),
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("d", GENERAL_NAME_union_d)]
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class GENERAL_NAMES(STACK):
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stack_element_type = GENERAL_NAME
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def __init__(self, value):
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super(GENERAL_NAMES, self).__init__(value)
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class X509_NAME_ENTRY(Structure):
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_fields_ = [("object", c_void_p),
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("value", c_void_p),
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("set", c_int),
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("size", c_int)]
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class ASN1_OCTET_STRING(Structure):
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_fields_ = [("length", c_int),
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("type", c_int),
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("data", POINTER(c_ubyte)),
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("flags", c_long)]
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class X509_EXTENSION(Structure):
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_fields_ = [("object", c_void_p),
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("critical", c_int),
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("value", POINTER(ASN1_OCTET_STRING))]
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class X509V3_EXT_METHOD(Structure):
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_fields_ = [("ext_nid", c_int),
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("ext_flags", c_int),
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("it", c_void_p),
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("ext_new", c_int),
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("ext_free", c_int),
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("d2i", c_int),
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("i2d", c_int)] # remaining fields omitted
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class TIMEVAL(Structure):
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_fields_ = [("tv_sec", c_long),
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("tv_usec", c_long)]
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#
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# Socket address conversions
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#
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class sockaddr_storage(Structure):
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_fields_ = [("ss_family", c_short),
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("pad", c_char * 126)]
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class sockaddr_in(Structure):
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_fields_ = [("sin_family", c_short),
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("sin_port", c_ushort),
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("sin_addr", c_uint * 1),
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("sin_zero", c_char * 8)]
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class sockaddr_in6(Structure):
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_fields_ = [("sin6_family", c_short),
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("sin6_port", c_ushort),
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("sin6_flowinfo", c_uint),
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("sin6_addr", c_uint * 4),
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("sin6_scope_id", c_uint)]
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class sockaddr_u(Union):
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_fields_ = [("ss", sockaddr_storage),
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("s4", sockaddr_in),
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("s6", sockaddr_in6)]
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py_inet_ntop = getattr(socket, "inet_ntop", None)
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if not py_inet_ntop:
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windll = getattr(ctypes, "windll", None)
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if windll:
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wsa_inet_ntop = getattr(windll.ws2_32, "inet_ntop", None)
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else:
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wsa_inet_ntop = None
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py_inet_pton = getattr(socket, "inet_pton", None)
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if not py_inet_pton:
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windll = getattr(ctypes, "windll", None)
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if windll:
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wsa_inet_pton = getattr(windll.ws2_32, "inet_pton", None)
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else:
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wsa_inet_pton = None
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def inet_ntop(address_family, packed_ip):
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if py_inet_ntop:
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return py_inet_ntop(address_family,
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array.array('I', packed_ip).tostring())
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if wsa_inet_ntop:
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string_buf = create_string_buffer(47)
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wsa_inet_ntop(address_family, packed_ip,
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string_buf, sizeof(string_buf))
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if not string_buf.value:
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raise ValueError("wsa_inet_ntop failed with: %s" %
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array.array('I', packed_ip).tostring())
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return string_buf.value
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if address_family == socket.AF_INET6:
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raise ValueError("Platform does not support IPv6")
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return socket.inet_ntoa(array.array('I', packed_ip).tostring())
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def inet_pton(address_family, string_ip):
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if address_family == socket.AF_INET6:
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ret_packed_ip = (c_uint * 4)()
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else:
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ret_packed_ip = (c_uint * 1)()
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if py_inet_pton:
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ret_string = py_inet_pton(address_family, string_ip)
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ret_packed_ip[:] = array.array('I', ret_string)
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elif wsa_inet_pton:
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if wsa_inet_pton(address_family, string_ip, ret_packed_ip) != 1:
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raise ValueError("wsa_inet_pton failed with: %s" % string_ip)
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else:
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if address_family == socket.AF_INET6:
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raise ValueError("Platform does not support IPv6")
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ret_string = socket.inet_aton(string_ip)
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ret_packed_ip[:] = array.array('I', ret_string)
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return ret_packed_ip
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def addr_tuple_from_sockaddr_u(su):
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if su.ss.ss_family == socket.AF_INET6:
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return (inet_ntop(socket.AF_INET6, su.s6.sin6_addr),
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socket.ntohs(su.s6.sin6_port),
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socket.ntohl(su.s6.sin6_flowinfo),
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socket.ntohl(su.s6.sin6_scope_id))
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assert su.ss.ss_family == socket.AF_INET
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return inet_ntop(socket.AF_INET, su.s4.sin_addr), \
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socket.ntohs(su.s4.sin_port)
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def sockaddr_u_from_addr_tuple(address):
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su = sockaddr_u()
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if len(address) > 2:
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su.ss.ss_family = socket.AF_INET6
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su.s6.sin6_addr[:] = inet_pton(socket.AF_INET6, address[0])
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su.s6.sin6_port = socket.htons(address[1])
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su.s6.sin6_flowinfo = socket.htonl(address[2])
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su.s6.sin6_scope_id = socket.htonl(address[3])
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else:
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su.ss.ss_family = socket.AF_INET
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su.s4.sin_addr[:] = inet_pton(socket.AF_INET, address[0])
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su.s4.sin_port = socket.htons(address[1])
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return su
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#
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# Error handling
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#
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def raise_ssl_error(result, func, args, ssl):
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if not ssl:
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ssl_error = SSL_ERROR_NONE
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else:
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ssl_error = _SSL_get_error(ssl, result)
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errqueue = []
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while True:
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err = _ERR_get_error()
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if not err:
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break
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buf = create_string_buffer(512)
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_ERR_error_string_n(err, buf, sizeof(buf))
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errqueue.append((err, buf.value))
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_logger.debug("SSL error raised: ssl_error: %d, result: %d, " +
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"errqueue: %s, func_name: %s",
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ssl_error, result, errqueue, func.func_name)
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raise openssl_error()(ssl_error, errqueue, result, func, args)
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def find_ssl_arg(args):
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for arg in args:
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if isinstance(arg, SSL):
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return arg
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def errcheck_ord(result, func, args):
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if result <= 0:
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raise_ssl_error(result, func, args, find_ssl_arg(args))
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return args
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def errcheck_p(result, func, args):
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if not result:
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raise_ssl_error(result, func, args, None)
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return args
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def errcheck_FuncParam(result, func, args):
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if not result:
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raise_ssl_error(result, func, args, None)
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return func.ret_type(result)
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#
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# Function prototypes
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#
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def _make_function(name, lib, args, export=True, errcheck="default"):
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assert len(args)
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def type_subst(map_type):
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if _subst.has_key(map_type):
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return _subst[map_type]
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return map_type
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sig = tuple(type_subst(i[0]) for i in args)
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# Handle pointer return values (width is architecture-dependent)
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if isinstance(sig[0], type) and issubclass(sig[0], FuncParam):
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sig = (c_void_p,) + sig[1:]
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pointer_return = True
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else:
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pointer_return = False
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if not _sigs.has_key(sig):
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_sigs[sig] = CFUNCTYPE(*sig)
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if export:
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glbl_name = name
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__all__.append(name)
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else:
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glbl_name = "_" + name
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func = _sigs[sig]((name, lib), tuple((i[2] if len(i) > 2 else 1,
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i[1],
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i[3] if len(i) > 3 else None)
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[:3 if len(i) > 3 else 2]
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for i in args[1:]))
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func.func_name = name
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if pointer_return:
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func.ret_type = args[0][0] # for fix-up during error checking protocol
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if errcheck == "default":
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# Assign error checker based on return type
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if args[0][0] in (c_int,):
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errcheck = errcheck_ord
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elif args[0][0] in (c_void_p, c_char_p):
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errcheck = errcheck_p
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elif pointer_return:
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errcheck = errcheck_FuncParam
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else:
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errcheck = None
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if errcheck:
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func.errcheck = errcheck
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globals()[glbl_name] = func
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_subst = {c_long_parm: c_long}
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_sigs = {}
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__all__ = ["BIO_NOCLOSE", "BIO_CLOSE",
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"SSLEAY_VERSION",
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"SSL_OP_NO_COMPRESSION",
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"SSL_VERIFY_NONE", "SSL_VERIFY_PEER",
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"SSL_VERIFY_FAIL_IF_NO_PEER_CERT", "SSL_VERIFY_CLIENT_ONCE",
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"SSL_SESS_CACHE_OFF", "SSL_SESS_CACHE_CLIENT",
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"SSL_SESS_CACHE_SERVER", "SSL_SESS_CACHE_BOTH",
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"SSL_SESS_CACHE_NO_AUTO_CLEAR", "SSL_SESS_CACHE_NO_INTERNAL_LOOKUP",
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"SSL_SESS_CACHE_NO_INTERNAL_STORE", "SSL_SESS_CACHE_NO_INTERNAL",
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"SSL_FILE_TYPE_PEM",
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"GEN_DIRNAME", "NID_subject_alt_name",
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"CRYPTO_LOCK",
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"CRYPTO_set_locking_callback",
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"DTLSv1_get_timeout", "DTLSv1_handle_timeout",
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"DTLSv1_listen",
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"BIO_gets", "BIO_read", "BIO_get_mem_data",
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"BIO_dgram_set_connected",
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"BIO_dgram_get_peer", "BIO_dgram_set_peer",
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|
"BIO_set_nbio",
|
|
"SSL_CTX_set_session_cache_mode", "SSL_CTX_set_read_ahead",
|
|
"SSL_CTX_set_options",
|
|
"SSL_read", "SSL_write",
|
|
"SSL_CTX_set_cookie_cb",
|
|
"OBJ_obj2txt", "decode_ASN1_STRING", "ASN1_TIME_print",
|
|
"X509_get_notAfter",
|
|
"ASN1_item_d2i", "GENERAL_NAME_print",
|
|
"sk_value",
|
|
"sk_pop_free",
|
|
"i2d_X509"] # note: the following map adds to this list
|
|
|
|
map(lambda x: _make_function(*x), (
|
|
("SSL_library_init", libssl, ((c_int, "ret"),)),
|
|
("SSL_load_error_strings", libssl, ((None, "ret"),)),
|
|
("SSLeay", libcrypto, ((c_long_parm, "ret"),)),
|
|
("SSLeay_version", libcrypto, ((c_char_p, "ret"), (c_int, "t"))),
|
|
("CRYPTO_set_locking_callback", libcrypto,
|
|
((None, "ret"), (c_void_p, "func")), False),
|
|
("CRYPTO_get_id_callback", libcrypto, ((c_void_p, "ret"),), True, None),
|
|
("CRYPTO_num_locks", libcrypto, ((c_int, "ret"),)),
|
|
("DTLSv1_server_method", libssl, ((DTLSv1Method, "ret"),)),
|
|
("DTLSv1_client_method", libssl, ((DTLSv1Method, "ret"),)),
|
|
("SSL_CTX_new", libssl, ((SSLCTX, "ret"), (DTLSv1Method, "meth"))),
|
|
("SSL_CTX_free", libssl, ((None, "ret"), (SSLCTX, "ctx"))),
|
|
("SSL_CTX_set_cookie_generate_cb", libssl,
|
|
((None, "ret"), (SSLCTX, "ctx"), (c_void_p, "app_gen_cookie_cb")), False),
|
|
("SSL_CTX_set_cookie_verify_cb", libssl,
|
|
((None, "ret"), (SSLCTX, "ctx"), (c_void_p, "app_verify_cookie_cb")),
|
|
False),
|
|
("SSL_new", libssl, ((SSL, "ret"), (SSLCTX, "ctx"))),
|
|
("SSL_free", libssl, ((None, "ret"), (SSL, "ssl"))),
|
|
("SSL_set_bio", libssl,
|
|
((None, "ret"), (SSL, "ssl"), (BIO, "rbio"), (BIO, "wbio"))),
|
|
("BIO_new", libcrypto, ((BIO, "ret"), (BIO_METHOD, "type"))),
|
|
("BIO_s_mem", libcrypto, ((BIO_METHOD, "ret"),)),
|
|
("BIO_new_file", libcrypto,
|
|
((BIO, "ret"), (c_char_p, "filename"), (c_char_p, "mode"))),
|
|
("BIO_new_dgram", libcrypto,
|
|
((BIO, "ret"), (c_int, "fd"), (c_int, "close_flag"))),
|
|
("BIO_free", libcrypto, ((c_int, "ret"), (BIO, "a"))),
|
|
("BIO_gets", libcrypto,
|
|
((c_int, "ret"), (BIO, "b"), (POINTER(c_char), "buf"), (c_int, "size")),
|
|
False),
|
|
("BIO_read", libcrypto,
|
|
((c_int, "ret"), (BIO, "b"), (c_void_p, "buf"), (c_int, "len")), False),
|
|
("SSL_CTX_ctrl", libssl,
|
|
((c_long_parm, "ret"), (SSLCTX, "ctx"), (c_int, "cmd"), (c_long, "larg"),
|
|
(c_void_p, "parg")), False),
|
|
("BIO_ctrl", libcrypto,
|
|
((c_long_parm, "ret"), (BIO, "bp"), (c_int, "cmd"), (c_long, "larg"),
|
|
(c_void_p, "parg")), False),
|
|
("SSL_ctrl", libssl,
|
|
((c_long_parm, "ret"), (SSL, "ssl"), (c_int, "cmd"), (c_long, "larg"),
|
|
(c_void_p, "parg")), False),
|
|
("ERR_get_error", libcrypto, ((c_long_parm, "ret"),), False),
|
|
("ERR_error_string_n", libcrypto,
|
|
((None, "ret"), (c_ulong, "e"), (c_char_p, "buf"), (c_size_t, "len")),
|
|
False),
|
|
("SSL_get_error", libssl, ((c_int, "ret"), (SSL, "ssl"), (c_int, "ret")),
|
|
False, None),
|
|
("SSL_CTX_set_cipher_list", libssl,
|
|
((c_int, "ret"), (SSLCTX, "ctx"), (c_char_p, "str"))),
|
|
("SSL_CTX_use_certificate_file", libssl,
|
|
((c_int, "ret"), (SSLCTX, "ctx"), (c_char_p, "file"), (c_int, "type"))),
|
|
("SSL_CTX_use_certificate_chain_file", libssl,
|
|
((c_int, "ret"), (SSLCTX, "ctx"), (c_char_p, "file"))),
|
|
("SSL_CTX_use_PrivateKey_file", libssl,
|
|
((c_int, "ret"), (SSLCTX, "ctx"), (c_char_p, "file"), (c_int, "type"))),
|
|
("SSL_CTX_load_verify_locations", libssl,
|
|
((c_int, "ret"), (SSLCTX, "ctx"), (c_char_p, "CAfile"),
|
|
(c_char_p, "CApath"))),
|
|
("SSL_CTX_set_verify", libssl,
|
|
((None, "ret"), (SSLCTX, "ctx"), (c_int, "mode"),
|
|
(c_void_p, "verify_callback", 1, None))),
|
|
("SSL_accept", libssl, ((c_int, "ret"), (SSL, "ssl"))),
|
|
("SSL_connect", libssl, ((c_int, "ret"), (SSL, "ssl"))),
|
|
("SSL_set_connect_state", libssl, ((None, "ret"), (SSL, "ssl"))),
|
|
("SSL_set_accept_state", libssl, ((None, "ret"), (SSL, "ssl"))),
|
|
("SSL_do_handshake", libssl, ((c_int, "ret"), (SSL, "ssl"))),
|
|
("SSL_get_peer_certificate", libssl, ((X509, "ret"), (SSL, "ssl"))),
|
|
("SSL_read", libssl,
|
|
((c_int, "ret"), (SSL, "ssl"), (c_void_p, "buf"), (c_int, "num")), False),
|
|
("SSL_write", libssl,
|
|
((c_int, "ret"), (SSL, "ssl"), (c_void_p, "buf"), (c_int, "num")), False),
|
|
("SSL_pending", libssl, ((c_int, "ret"), (SSL, "ssl")), True, None),
|
|
("SSL_shutdown", libssl, ((c_int, "ret"), (SSL, "ssl"))),
|
|
("SSL_set_read_ahead", libssl,
|
|
((None, "ret"), (SSL, "ssl"), (c_int, "yes"))),
|
|
("X509_free", libcrypto, ((None, "ret"), (X509, "a"))),
|
|
("PEM_read_bio_X509_AUX", libcrypto,
|
|
((X509, "ret"), (BIO, "bp"), (c_void_p, "x", 1, None),
|
|
(c_void_p, "cb", 1, None), (c_void_p, "u", 1, None))),
|
|
("OBJ_obj2txt", libcrypto,
|
|
((c_int, "ret"), (POINTER(c_char), "buf"), (c_int, "buf_len"),
|
|
(ASN1_OBJECT, "a"), (c_int, "no_name")), False),
|
|
("CRYPTO_free", libcrypto, ((None, "ret"), (c_void_p, "ptr"))),
|
|
("ASN1_STRING_to_UTF8", libcrypto,
|
|
((c_int, "ret"), (POINTER(POINTER(c_ubyte)), "out"), (ASN1_STRING, "in")),
|
|
False),
|
|
("X509_NAME_entry_count", libcrypto,
|
|
((c_int, "ret"), (POINTER(X509_name_st), "name")), True, None),
|
|
("X509_NAME_get_entry", libcrypto,
|
|
((POINTER(X509_NAME_ENTRY), "ret"), (POINTER(X509_name_st), "name"),
|
|
(c_int, "loc")), True, errcheck_p),
|
|
("X509_NAME_ENTRY_get_object", libcrypto,
|
|
((ASN1_OBJECT, "ret"), (POINTER(X509_NAME_ENTRY), "ne"))),
|
|
("X509_NAME_ENTRY_get_data", libcrypto,
|
|
((ASN1_STRING, "ret"), (POINTER(X509_NAME_ENTRY), "ne"))),
|
|
("X509_get_subject_name", libcrypto,
|
|
((POINTER(X509_name_st), "ret"), (X509, "a")), True, errcheck_p),
|
|
("ASN1_TIME_print", libcrypto,
|
|
((c_int, "ret"), (BIO, "fp"), (ASN1_TIME, "a")), False),
|
|
("X509_get_ext_by_NID", libcrypto,
|
|
((c_int, "ret"), (X509, "x"), (c_int, "nid"), (c_int, "lastpos")),
|
|
True, None),
|
|
("X509_get_ext", libcrypto,
|
|
((POINTER(X509_EXTENSION), "ret"), (X509, "x"), (c_int, "loc")),
|
|
True, errcheck_p),
|
|
("X509V3_EXT_get", libcrypto,
|
|
((POINTER(X509V3_EXT_METHOD), "ret"), (POINTER(X509_EXTENSION), "ext")),
|
|
True, errcheck_p),
|
|
("ASN1_item_d2i", libcrypto,
|
|
((c_void_p, "ret"), (c_void_p, "val"), (POINTER(POINTER(c_ubyte)), "in"),
|
|
(c_long, "len"), (c_void_p, "it")), False, None),
|
|
("sk_num", libcrypto, ((c_int, "ret"), (STACK, "stack")), True, None),
|
|
("sk_value", libcrypto,
|
|
((c_void_p, "ret"), (STACK, "stack"), (c_int, "loc")), False),
|
|
("GENERAL_NAME_print", libcrypto,
|
|
((c_int, "ret"), (BIO, "out"), (POINTER(GENERAL_NAME), "gen")), False),
|
|
("sk_pop_free", libcrypto,
|
|
((None, "ret"), (STACK, "st"), (c_void_p, "func")), False),
|
|
("i2d_X509_bio", libcrypto, ((c_int, "ret"), (BIO, "bp"), (X509, "x")),
|
|
False),
|
|
("SSL_get_current_cipher", libssl, ((SSL_CIPHER, "ret"), (SSL, "ssl"))),
|
|
("SSL_CIPHER_get_name", libssl,
|
|
((c_char_p, "ret"), (SSL_CIPHER, "cipher"))),
|
|
("SSL_CIPHER_get_version", libssl,
|
|
((c_char_p, "ret"), (SSL_CIPHER, "cipher"))),
|
|
("SSL_CIPHER_get_bits", libssl,
|
|
((c_int, "ret"), (SSL_CIPHER, "cipher"),
|
|
(POINTER(c_int), "alg_bits", 1, None)), True, None),
|
|
))
|
|
|
|
#
|
|
# Wrappers - functions generally equivalent to OpenSSL library macros
|
|
#
|
|
_rvoid_int_int_charp_int = CFUNCTYPE(None, c_int, c_int, c_char_p, c_int)
|
|
|
|
def CRYPTO_set_locking_callback(locking_function):
|
|
def py_locking_function(mode, n, file, line):
|
|
try:
|
|
locking_function(mode, n, file, line)
|
|
except:
|
|
_logger.exception("Thread locking failed")
|
|
|
|
global _locking_cb # for keep-alive
|
|
_locking_cb = _rvoid_int_int_charp_int(py_locking_function)
|
|
_CRYPTO_set_locking_callback(_locking_cb)
|
|
|
|
def SSL_CTX_set_session_cache_mode(ctx, mode):
|
|
# Returns the previous value of mode
|
|
_SSL_CTX_ctrl(ctx, SSL_CTRL_SET_SESS_CACHE_MODE, mode, None)
|
|
|
|
def SSL_CTX_set_read_ahead(ctx, m):
|
|
# Returns the previous value of m
|
|
_SSL_CTX_ctrl(ctx, SSL_CTRL_SET_READ_AHEAD, m, None)
|
|
|
|
def SSL_CTX_set_options(ctx, options):
|
|
# Returns the new option bitmaks after adding the given options
|
|
_SSL_CTX_ctrl(ctx, SSL_CTRL_OPTIONS, options, None)
|
|
|
|
_rint_voidp_ubytep_uintp = CFUNCTYPE(c_int, c_void_p, POINTER(c_ubyte),
|
|
POINTER(c_uint))
|
|
_rint_voidp_ubytep_uint = CFUNCTYPE(c_int, c_void_p, POINTER(c_ubyte), c_uint)
|
|
|
|
def SSL_CTX_set_cookie_cb(ctx, generate, verify):
|
|
def py_generate_cookie_cb(ssl, cookie, cookie_len):
|
|
try:
|
|
ret_cookie = generate(SSL(ssl))
|
|
except:
|
|
_logger.exception("Cookie generation failed")
|
|
return 0
|
|
cookie_len[0] = len(ret_cookie)
|
|
memmove(cookie, ret_cookie, cookie_len[0])
|
|
_logger.debug("Returning cookie: %s", cookie[:cookie_len[0]])
|
|
return 1
|
|
|
|
def py_verify_cookie_cb(ssl, cookie, cookie_len):
|
|
_logger.debug("Verifying cookie: %s", cookie[:cookie_len])
|
|
try:
|
|
verify(SSL(ssl), ''.join([chr(i) for i in cookie[:cookie_len]]))
|
|
except:
|
|
_logger.debug("Cookie verification failed")
|
|
return 0
|
|
return 1
|
|
|
|
gen_cb = _rint_voidp_ubytep_uintp(py_generate_cookie_cb)
|
|
ver_cb = _rint_voidp_ubytep_uint(py_verify_cookie_cb)
|
|
_SSL_CTX_set_cookie_generate_cb(ctx, gen_cb)
|
|
_SSL_CTX_set_cookie_verify_cb(ctx, ver_cb)
|
|
return gen_cb, ver_cb
|
|
|
|
def BIO_dgram_set_connected(bio, peer_address):
|
|
su = sockaddr_u_from_addr_tuple(peer_address)
|
|
_BIO_ctrl(bio, BIO_CTRL_DGRAM_SET_CONNECTED, 0, byref(su))
|
|
|
|
def BIO_dgram_get_peer(bio):
|
|
su = sockaddr_u()
|
|
_BIO_ctrl(bio, BIO_CTRL_DGRAM_GET_PEER, 0, byref(su))
|
|
return addr_tuple_from_sockaddr_u(su)
|
|
|
|
def BIO_dgram_set_peer(bio, peer_address):
|
|
su = sockaddr_u_from_addr_tuple(peer_address)
|
|
_BIO_ctrl(bio, BIO_CTRL_DGRAM_SET_PEER, 0, byref(su))
|
|
|
|
def BIO_set_nbio(bio, n):
|
|
_BIO_ctrl(bio, BIO_C_SET_NBIO, 1 if n else 0, None)
|
|
|
|
def DTLSv1_get_timeout(ssl):
|
|
tv = TIMEVAL()
|
|
ret = _SSL_ctrl(ssl, DTLS_CTRL_GET_TIMEOUT, 0, byref(tv))
|
|
if ret != 1:
|
|
return
|
|
return timedelta(seconds=tv.tv_sec, microseconds=tv.tv_usec)
|
|
|
|
def DTLSv1_handle_timeout(ssl):
|
|
ret = _SSL_ctrl(ssl, DTLS_CTRL_HANDLE_TIMEOUT, 0, None)
|
|
if ret == 0:
|
|
# It was too early to call: no timer had yet expired
|
|
return False
|
|
if ret == 1:
|
|
# Buffered messages were retransmitted
|
|
return True
|
|
# There was an error: either too many timeouts have occurred or a
|
|
# retransmission failed
|
|
assert ret < 0
|
|
if ret > 0:
|
|
ret = -10
|
|
errcheck_p(ret, _SSL_ctrl, (ssl, DTLS_CTRL_HANDLE_TIMEOUT, 0, None))
|
|
|
|
def DTLSv1_listen(ssl):
|
|
su = sockaddr_u()
|
|
ret = _SSL_ctrl(ssl, DTLS_CTRL_LISTEN, 0, byref(su))
|
|
errcheck_ord(ret, _SSL_ctrl, (ssl, DTLS_CTRL_LISTEN, 0, byref(su)))
|
|
return addr_tuple_from_sockaddr_u(su)
|
|
|
|
def SSL_read(ssl, length):
|
|
buf = create_string_buffer(length)
|
|
res_len = _SSL_read(ssl, buf, sizeof(buf))
|
|
return buf.raw[:res_len]
|
|
|
|
def SSL_write(ssl, data):
|
|
if isinstance(data, str):
|
|
str_data = data
|
|
elif hasattr(data, "tobytes") and callable(data.tobytes):
|
|
str_data = data.tobytes()
|
|
else:
|
|
str_data = str(data)
|
|
return _SSL_write(ssl, str_data, len(str_data))
|
|
|
|
def OBJ_obj2txt(asn1_object, no_name):
|
|
buf = create_string_buffer(X509_NAME_MAXLEN)
|
|
res_len = _OBJ_obj2txt(buf, sizeof(buf), asn1_object, 1 if no_name else 0)
|
|
return buf.raw[:res_len]
|
|
|
|
def decode_ASN1_STRING(asn1_string):
|
|
utf8_buf_ptr = POINTER(c_ubyte)()
|
|
res_len = _ASN1_STRING_to_UTF8(byref(utf8_buf_ptr), asn1_string)
|
|
try:
|
|
return unicode(''.join([chr(i) for i in utf8_buf_ptr[:res_len]]),
|
|
'utf-8')
|
|
finally:
|
|
CRYPTO_free(utf8_buf_ptr)
|
|
|
|
def X509_get_notAfter(x509):
|
|
x509_raw = X509.from_param(x509)
|
|
x509_ptr = cast(x509_raw, POINTER(X509_st))
|
|
notAfter = x509_ptr.contents.cert_info.contents.validity.contents.notAfter
|
|
return ASN1_TIME(notAfter)
|
|
|
|
def BIO_gets(bio):
|
|
buf = create_string_buffer(GETS_MAXLEN)
|
|
res_len = _BIO_gets(bio, buf, sizeof(buf) - 1)
|
|
return buf.raw[:res_len]
|
|
|
|
def BIO_read(bio, length):
|
|
buf = create_string_buffer(length)
|
|
res_len = _BIO_read(bio, buf, sizeof(buf))
|
|
return buf.raw[:res_len]
|
|
|
|
def BIO_get_mem_data(bio):
|
|
buf = POINTER(c_ubyte)()
|
|
res_len = _BIO_ctrl(bio, BIO_CTRL_INFO, 0, byref(buf))
|
|
return ''.join([chr(i) for i in buf[:res_len]])
|
|
|
|
def ASN1_TIME_print(asn1_time):
|
|
bio = _BIO(BIO_new(BIO_s_mem()))
|
|
_ASN1_TIME_print(bio.value, asn1_time)
|
|
return BIO_gets(bio.value)
|
|
|
|
_rvoidp = CFUNCTYPE(c_void_p)
|
|
|
|
def _ASN1_ITEM_ptr(item):
|
|
if sys.platform.startswith('win'):
|
|
func_ptr = _rvoidp(item)
|
|
return func_ptr()
|
|
return item
|
|
|
|
_rvoidp_voidp_ubytepp_long = CFUNCTYPE(c_void_p, c_void_p,
|
|
POINTER(POINTER(c_ubyte)), c_long)
|
|
|
|
def ASN1_item_d2i(method, asn1_octet_string):
|
|
data_in = POINTER(c_ubyte)(asn1_octet_string.data.contents)
|
|
if method.it:
|
|
return GENERAL_NAMES(_ASN1_item_d2i(None, byref(data_in),
|
|
asn1_octet_string.length,
|
|
_ASN1_ITEM_ptr(method.it)))
|
|
func_ptr = _rvoidp_voidp_ubytepp_long(method.d2i)
|
|
return GENERAL_NAMES(func_ptr(None, byref(data_in),
|
|
asn1_octet_string.length))
|
|
|
|
def sk_value(stack, loc):
|
|
return cast(_sk_value(stack, loc), POINTER(stack.stack_element_type))
|
|
|
|
def GENERAL_NAME_print(general_name):
|
|
bio = _BIO(BIO_new(BIO_s_mem()))
|
|
_GENERAL_NAME_print(bio.value, general_name)
|
|
return BIO_gets(bio.value)
|
|
|
|
_free_func = addressof(c_void_p.in_dll(libcrypto, "sk_free"))
|
|
|
|
def sk_pop_free(stack):
|
|
_sk_pop_free(stack, _free_func)
|
|
|
|
def i2d_X509(x509):
|
|
bio = _BIO(BIO_new(BIO_s_mem()))
|
|
_i2d_X509_bio(bio.value, x509)
|
|
return BIO_get_mem_data(bio.value)
|