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494 lines
16 KiB
494 lines
16 KiB
5 years ago
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"""
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This module uses ctypes to bind a whole bunch of functions and constants from
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SecureTransport. The goal here is to provide the low-level API to
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SecureTransport. These are essentially the C-level functions and constants, and
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they're pretty gross to work with.
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This code is a bastardised version of the code found in Will Bond's oscrypto
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library. An enormous debt is owed to him for blazing this trail for us. For
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that reason, this code should be considered to be covered both by urllib3's
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license and by oscrypto's:
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Copyright (c) 2015-2016 Will Bond <will@wbond.net>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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"""
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from __future__ import absolute_import
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import platform
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from ctypes.util import find_library
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from ctypes import (
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c_void_p,
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c_int32,
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c_char_p,
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c_size_t,
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c_byte,
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c_uint32,
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c_ulong,
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c_long,
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c_bool,
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)
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from ctypes import CDLL, POINTER, CFUNCTYPE
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security_path = find_library("Security")
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if not security_path:
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raise ImportError("The library Security could not be found")
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core_foundation_path = find_library("CoreFoundation")
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if not core_foundation_path:
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raise ImportError("The library CoreFoundation could not be found")
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version = platform.mac_ver()[0]
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version_info = tuple(map(int, version.split(".")))
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if version_info < (10, 8):
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raise OSError(
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"Only OS X 10.8 and newer are supported, not %s.%s"
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% (version_info[0], version_info[1])
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)
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Security = CDLL(security_path, use_errno=True)
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CoreFoundation = CDLL(core_foundation_path, use_errno=True)
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Boolean = c_bool
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CFIndex = c_long
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CFStringEncoding = c_uint32
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CFData = c_void_p
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CFString = c_void_p
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CFArray = c_void_p
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CFMutableArray = c_void_p
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CFDictionary = c_void_p
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CFError = c_void_p
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CFType = c_void_p
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CFTypeID = c_ulong
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CFTypeRef = POINTER(CFType)
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CFAllocatorRef = c_void_p
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OSStatus = c_int32
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CFDataRef = POINTER(CFData)
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CFStringRef = POINTER(CFString)
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CFArrayRef = POINTER(CFArray)
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CFMutableArrayRef = POINTER(CFMutableArray)
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CFDictionaryRef = POINTER(CFDictionary)
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CFArrayCallBacks = c_void_p
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CFDictionaryKeyCallBacks = c_void_p
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CFDictionaryValueCallBacks = c_void_p
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SecCertificateRef = POINTER(c_void_p)
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SecExternalFormat = c_uint32
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SecExternalItemType = c_uint32
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SecIdentityRef = POINTER(c_void_p)
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SecItemImportExportFlags = c_uint32
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SecItemImportExportKeyParameters = c_void_p
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SecKeychainRef = POINTER(c_void_p)
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SSLProtocol = c_uint32
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SSLCipherSuite = c_uint32
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SSLContextRef = POINTER(c_void_p)
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SecTrustRef = POINTER(c_void_p)
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SSLConnectionRef = c_uint32
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SecTrustResultType = c_uint32
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SecTrustOptionFlags = c_uint32
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SSLProtocolSide = c_uint32
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SSLConnectionType = c_uint32
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SSLSessionOption = c_uint32
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try:
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Security.SecItemImport.argtypes = [
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CFDataRef,
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CFStringRef,
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POINTER(SecExternalFormat),
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POINTER(SecExternalItemType),
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SecItemImportExportFlags,
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POINTER(SecItemImportExportKeyParameters),
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SecKeychainRef,
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POINTER(CFArrayRef),
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]
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Security.SecItemImport.restype = OSStatus
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Security.SecCertificateGetTypeID.argtypes = []
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Security.SecCertificateGetTypeID.restype = CFTypeID
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Security.SecIdentityGetTypeID.argtypes = []
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Security.SecIdentityGetTypeID.restype = CFTypeID
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Security.SecKeyGetTypeID.argtypes = []
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Security.SecKeyGetTypeID.restype = CFTypeID
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Security.SecCertificateCreateWithData.argtypes = [CFAllocatorRef, CFDataRef]
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Security.SecCertificateCreateWithData.restype = SecCertificateRef
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Security.SecCertificateCopyData.argtypes = [SecCertificateRef]
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Security.SecCertificateCopyData.restype = CFDataRef
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Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
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Security.SecCopyErrorMessageString.restype = CFStringRef
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Security.SecIdentityCreateWithCertificate.argtypes = [
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CFTypeRef,
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SecCertificateRef,
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POINTER(SecIdentityRef),
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]
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Security.SecIdentityCreateWithCertificate.restype = OSStatus
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Security.SecKeychainCreate.argtypes = [
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c_char_p,
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c_uint32,
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c_void_p,
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Boolean,
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c_void_p,
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POINTER(SecKeychainRef),
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]
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Security.SecKeychainCreate.restype = OSStatus
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Security.SecKeychainDelete.argtypes = [SecKeychainRef]
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Security.SecKeychainDelete.restype = OSStatus
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Security.SecPKCS12Import.argtypes = [
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CFDataRef,
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CFDictionaryRef,
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POINTER(CFArrayRef),
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]
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Security.SecPKCS12Import.restype = OSStatus
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SSLReadFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, c_void_p, POINTER(c_size_t))
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SSLWriteFunc = CFUNCTYPE(
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OSStatus, SSLConnectionRef, POINTER(c_byte), POINTER(c_size_t)
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)
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Security.SSLSetIOFuncs.argtypes = [SSLContextRef, SSLReadFunc, SSLWriteFunc]
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Security.SSLSetIOFuncs.restype = OSStatus
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Security.SSLSetPeerID.argtypes = [SSLContextRef, c_char_p, c_size_t]
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Security.SSLSetPeerID.restype = OSStatus
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Security.SSLSetCertificate.argtypes = [SSLContextRef, CFArrayRef]
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Security.SSLSetCertificate.restype = OSStatus
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Security.SSLSetCertificateAuthorities.argtypes = [SSLContextRef, CFTypeRef, Boolean]
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Security.SSLSetCertificateAuthorities.restype = OSStatus
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Security.SSLSetConnection.argtypes = [SSLContextRef, SSLConnectionRef]
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Security.SSLSetConnection.restype = OSStatus
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Security.SSLSetPeerDomainName.argtypes = [SSLContextRef, c_char_p, c_size_t]
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Security.SSLSetPeerDomainName.restype = OSStatus
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Security.SSLHandshake.argtypes = [SSLContextRef]
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Security.SSLHandshake.restype = OSStatus
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Security.SSLRead.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
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Security.SSLRead.restype = OSStatus
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Security.SSLWrite.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
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Security.SSLWrite.restype = OSStatus
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Security.SSLClose.argtypes = [SSLContextRef]
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Security.SSLClose.restype = OSStatus
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Security.SSLGetNumberSupportedCiphers.argtypes = [SSLContextRef, POINTER(c_size_t)]
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Security.SSLGetNumberSupportedCiphers.restype = OSStatus
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Security.SSLGetSupportedCiphers.argtypes = [
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SSLContextRef,
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POINTER(SSLCipherSuite),
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POINTER(c_size_t),
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]
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Security.SSLGetSupportedCiphers.restype = OSStatus
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Security.SSLSetEnabledCiphers.argtypes = [
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SSLContextRef,
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POINTER(SSLCipherSuite),
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c_size_t,
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]
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Security.SSLSetEnabledCiphers.restype = OSStatus
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Security.SSLGetNumberEnabledCiphers.argtype = [SSLContextRef, POINTER(c_size_t)]
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Security.SSLGetNumberEnabledCiphers.restype = OSStatus
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Security.SSLGetEnabledCiphers.argtypes = [
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SSLContextRef,
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POINTER(SSLCipherSuite),
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POINTER(c_size_t),
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]
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Security.SSLGetEnabledCiphers.restype = OSStatus
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Security.SSLGetNegotiatedCipher.argtypes = [SSLContextRef, POINTER(SSLCipherSuite)]
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Security.SSLGetNegotiatedCipher.restype = OSStatus
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Security.SSLGetNegotiatedProtocolVersion.argtypes = [
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SSLContextRef,
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POINTER(SSLProtocol),
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]
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Security.SSLGetNegotiatedProtocolVersion.restype = OSStatus
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Security.SSLCopyPeerTrust.argtypes = [SSLContextRef, POINTER(SecTrustRef)]
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Security.SSLCopyPeerTrust.restype = OSStatus
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Security.SecTrustSetAnchorCertificates.argtypes = [SecTrustRef, CFArrayRef]
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Security.SecTrustSetAnchorCertificates.restype = OSStatus
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Security.SecTrustSetAnchorCertificatesOnly.argstypes = [SecTrustRef, Boolean]
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Security.SecTrustSetAnchorCertificatesOnly.restype = OSStatus
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Security.SecTrustEvaluate.argtypes = [SecTrustRef, POINTER(SecTrustResultType)]
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Security.SecTrustEvaluate.restype = OSStatus
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Security.SecTrustGetCertificateCount.argtypes = [SecTrustRef]
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Security.SecTrustGetCertificateCount.restype = CFIndex
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Security.SecTrustGetCertificateAtIndex.argtypes = [SecTrustRef, CFIndex]
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Security.SecTrustGetCertificateAtIndex.restype = SecCertificateRef
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Security.SSLCreateContext.argtypes = [
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CFAllocatorRef,
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SSLProtocolSide,
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SSLConnectionType,
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]
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Security.SSLCreateContext.restype = SSLContextRef
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Security.SSLSetSessionOption.argtypes = [SSLContextRef, SSLSessionOption, Boolean]
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Security.SSLSetSessionOption.restype = OSStatus
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Security.SSLSetProtocolVersionMin.argtypes = [SSLContextRef, SSLProtocol]
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Security.SSLSetProtocolVersionMin.restype = OSStatus
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Security.SSLSetProtocolVersionMax.argtypes = [SSLContextRef, SSLProtocol]
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Security.SSLSetProtocolVersionMax.restype = OSStatus
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Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
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Security.SecCopyErrorMessageString.restype = CFStringRef
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Security.SSLReadFunc = SSLReadFunc
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Security.SSLWriteFunc = SSLWriteFunc
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Security.SSLContextRef = SSLContextRef
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Security.SSLProtocol = SSLProtocol
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Security.SSLCipherSuite = SSLCipherSuite
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Security.SecIdentityRef = SecIdentityRef
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Security.SecKeychainRef = SecKeychainRef
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Security.SecTrustRef = SecTrustRef
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Security.SecTrustResultType = SecTrustResultType
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Security.SecExternalFormat = SecExternalFormat
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Security.OSStatus = OSStatus
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Security.kSecImportExportPassphrase = CFStringRef.in_dll(
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Security, "kSecImportExportPassphrase"
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)
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Security.kSecImportItemIdentity = CFStringRef.in_dll(
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Security, "kSecImportItemIdentity"
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)
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# CoreFoundation time!
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CoreFoundation.CFRetain.argtypes = [CFTypeRef]
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CoreFoundation.CFRetain.restype = CFTypeRef
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CoreFoundation.CFRelease.argtypes = [CFTypeRef]
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CoreFoundation.CFRelease.restype = None
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CoreFoundation.CFGetTypeID.argtypes = [CFTypeRef]
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CoreFoundation.CFGetTypeID.restype = CFTypeID
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CoreFoundation.CFStringCreateWithCString.argtypes = [
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CFAllocatorRef,
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c_char_p,
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CFStringEncoding,
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]
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CoreFoundation.CFStringCreateWithCString.restype = CFStringRef
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CoreFoundation.CFStringGetCStringPtr.argtypes = [CFStringRef, CFStringEncoding]
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CoreFoundation.CFStringGetCStringPtr.restype = c_char_p
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CoreFoundation.CFStringGetCString.argtypes = [
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CFStringRef,
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c_char_p,
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CFIndex,
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CFStringEncoding,
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]
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CoreFoundation.CFStringGetCString.restype = c_bool
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CoreFoundation.CFDataCreate.argtypes = [CFAllocatorRef, c_char_p, CFIndex]
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CoreFoundation.CFDataCreate.restype = CFDataRef
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CoreFoundation.CFDataGetLength.argtypes = [CFDataRef]
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CoreFoundation.CFDataGetLength.restype = CFIndex
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||
|
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CoreFoundation.CFDataGetBytePtr.argtypes = [CFDataRef]
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CoreFoundation.CFDataGetBytePtr.restype = c_void_p
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CoreFoundation.CFDictionaryCreate.argtypes = [
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CFAllocatorRef,
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POINTER(CFTypeRef),
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POINTER(CFTypeRef),
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||
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CFIndex,
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CFDictionaryKeyCallBacks,
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CFDictionaryValueCallBacks,
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]
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||
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CoreFoundation.CFDictionaryCreate.restype = CFDictionaryRef
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||
|
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CoreFoundation.CFDictionaryGetValue.argtypes = [CFDictionaryRef, CFTypeRef]
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CoreFoundation.CFDictionaryGetValue.restype = CFTypeRef
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CoreFoundation.CFArrayCreate.argtypes = [
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CFAllocatorRef,
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POINTER(CFTypeRef),
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|
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CFIndex,
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|
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CFArrayCallBacks,
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||
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]
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CoreFoundation.CFArrayCreate.restype = CFArrayRef
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||
|
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|
CoreFoundation.CFArrayCreateMutable.argtypes = [
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CFAllocatorRef,
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CFIndex,
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||
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CFArrayCallBacks,
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||
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]
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||
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CoreFoundation.CFArrayCreateMutable.restype = CFMutableArrayRef
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||
|
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||
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CoreFoundation.CFArrayAppendValue.argtypes = [CFMutableArrayRef, c_void_p]
|
||
|
|
CoreFoundation.CFArrayAppendValue.restype = None
|
||
|
|
|
||
|
|
CoreFoundation.CFArrayGetCount.argtypes = [CFArrayRef]
|
||
|
|
CoreFoundation.CFArrayGetCount.restype = CFIndex
|
||
|
|
|
||
|
|
CoreFoundation.CFArrayGetValueAtIndex.argtypes = [CFArrayRef, CFIndex]
|
||
|
|
CoreFoundation.CFArrayGetValueAtIndex.restype = c_void_p
|
||
|
|
|
||
|
|
CoreFoundation.kCFAllocatorDefault = CFAllocatorRef.in_dll(
|
||
|
|
CoreFoundation, "kCFAllocatorDefault"
|
||
|
|
)
|
||
|
|
CoreFoundation.kCFTypeArrayCallBacks = c_void_p.in_dll(
|
||
|
|
CoreFoundation, "kCFTypeArrayCallBacks"
|
||
|
|
)
|
||
|
|
CoreFoundation.kCFTypeDictionaryKeyCallBacks = c_void_p.in_dll(
|
||
|
|
CoreFoundation, "kCFTypeDictionaryKeyCallBacks"
|
||
|
|
)
|
||
|
|
CoreFoundation.kCFTypeDictionaryValueCallBacks = c_void_p.in_dll(
|
||
|
|
CoreFoundation, "kCFTypeDictionaryValueCallBacks"
|
||
|
|
)
|
||
|
|
|
||
|
|
CoreFoundation.CFTypeRef = CFTypeRef
|
||
|
|
CoreFoundation.CFArrayRef = CFArrayRef
|
||
|
|
CoreFoundation.CFStringRef = CFStringRef
|
||
|
|
CoreFoundation.CFDictionaryRef = CFDictionaryRef
|
||
|
|
|
||
|
|
except (AttributeError):
|
||
|
|
raise ImportError("Error initializing ctypes")
|
||
|
|
|
||
|
|
|
||
|
|
class CFConst(object):
|
||
|
|
"""
|
||
|
|
A class object that acts as essentially a namespace for CoreFoundation
|
||
|
|
constants.
|
||
|
|
"""
|
||
|
|
|
||
|
|
kCFStringEncodingUTF8 = CFStringEncoding(0x08000100)
|
||
|
|
|
||
|
|
|
||
|
|
class SecurityConst(object):
|
||
|
|
"""
|
||
|
|
A class object that acts as essentially a namespace for Security constants.
|
||
|
|
"""
|
||
|
|
|
||
|
|
kSSLSessionOptionBreakOnServerAuth = 0
|
||
|
|
|
||
|
|
kSSLProtocol2 = 1
|
||
|
|
kSSLProtocol3 = 2
|
||
|
|
kTLSProtocol1 = 4
|
||
|
|
kTLSProtocol11 = 7
|
||
|
|
kTLSProtocol12 = 8
|
||
|
|
# SecureTransport does not support TLS 1.3 even if there's a constant for it
|
||
|
|
kTLSProtocol13 = 10
|
||
|
|
kTLSProtocolMaxSupported = 999
|
||
|
|
|
||
|
|
kSSLClientSide = 1
|
||
|
|
kSSLStreamType = 0
|
||
|
|
|
||
|
|
kSecFormatPEMSequence = 10
|
||
|
|
|
||
|
|
kSecTrustResultInvalid = 0
|
||
|
|
kSecTrustResultProceed = 1
|
||
|
|
# This gap is present on purpose: this was kSecTrustResultConfirm, which
|
||
|
|
# is deprecated.
|
||
|
|
kSecTrustResultDeny = 3
|
||
|
|
kSecTrustResultUnspecified = 4
|
||
|
|
kSecTrustResultRecoverableTrustFailure = 5
|
||
|
|
kSecTrustResultFatalTrustFailure = 6
|
||
|
|
kSecTrustResultOtherError = 7
|
||
|
|
|
||
|
|
errSSLProtocol = -9800
|
||
|
|
errSSLWouldBlock = -9803
|
||
|
|
errSSLClosedGraceful = -9805
|
||
|
|
errSSLClosedNoNotify = -9816
|
||
|
|
errSSLClosedAbort = -9806
|
||
|
|
|
||
|
|
errSSLXCertChainInvalid = -9807
|
||
|
|
errSSLCrypto = -9809
|
||
|
|
errSSLInternal = -9810
|
||
|
|
errSSLCertExpired = -9814
|
||
|
|
errSSLCertNotYetValid = -9815
|
||
|
|
errSSLUnknownRootCert = -9812
|
||
|
|
errSSLNoRootCert = -9813
|
||
|
|
errSSLHostNameMismatch = -9843
|
||
|
|
errSSLPeerHandshakeFail = -9824
|
||
|
|
errSSLPeerUserCancelled = -9839
|
||
|
|
errSSLWeakPeerEphemeralDHKey = -9850
|
||
|
|
errSSLServerAuthCompleted = -9841
|
||
|
|
errSSLRecordOverflow = -9847
|
||
|
|
|
||
|
|
errSecVerifyFailed = -67808
|
||
|
|
errSecNoTrustSettings = -25263
|
||
|
|
errSecItemNotFound = -25300
|
||
|
|
errSecInvalidTrustSettings = -25262
|
||
|
|
|
||
|
|
# Cipher suites. We only pick the ones our default cipher string allows.
|
||
|
|
# Source: https://developer.apple.com/documentation/security/1550981-ssl_cipher_suite_values
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = 0xC02C
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = 0xC030
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = 0xC02B
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = 0xC02F
|
||
|
|
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA9
|
||
|
|
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA8
|
||
|
|
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = 0x009F
|
||
|
|
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = 0x009E
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = 0xC024
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = 0xC028
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = 0xC00A
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = 0xC014
|
||
|
|
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = 0x006B
|
||
|
|
TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0x0039
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = 0xC023
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = 0xC027
|
||
|
|
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0xC009
|
||
|
|
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = 0xC013
|
||
|
|
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = 0x0067
|
||
|
|
TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0x0033
|
||
|
|
TLS_RSA_WITH_AES_256_GCM_SHA384 = 0x009D
|
||
|
|
TLS_RSA_WITH_AES_128_GCM_SHA256 = 0x009C
|
||
|
|
TLS_RSA_WITH_AES_256_CBC_SHA256 = 0x003D
|
||
|
|
TLS_RSA_WITH_AES_128_CBC_SHA256 = 0x003C
|
||
|
|
TLS_RSA_WITH_AES_256_CBC_SHA = 0x0035
|
||
|
|
TLS_RSA_WITH_AES_128_CBC_SHA = 0x002F
|
||
|
|
TLS_AES_128_GCM_SHA256 = 0x1301
|
||
|
|
TLS_AES_256_GCM_SHA384 = 0x1302
|
||
|
|
TLS_AES_128_CCM_8_SHA256 = 0x1305
|
||
|
|
TLS_AES_128_CCM_SHA256 = 0x1304
|