1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import Foundation
import CoreFoundation
#if !swift(>=4.2)
// Swift 3/4 compatibility
fileprivate extension RunLoopMode {
static let `default` = defaultRunLoopMode
}
#endif
#if os(Linux)
public class TSSLSocketTransport {
init(hostname: String, port: UInt16) {
// FIXME!
assert(false, "Security not available in Linux, TSSLSocketTransport Unavilable for now")
}
}
#else
let isLittleEndian = Int(OSHostByteOrder()) == OSLittleEndian
let htons = isLittleEndian ? _OSSwapInt16 : { $0 }
let htonl = isLittleEndian ? _OSSwapInt32 : { $0 }
public class TSSLSocketTransport: TStreamTransport {
var sslHostname: String
var sd: Int32 = 0
public init(hostname: String, port: UInt16) throws {
sslHostname = hostname
var readStream: Unmanaged<CFReadStream>?
var writeStream: Unmanaged<CFWriteStream>?
/* create a socket structure */
var pin: sockaddr_in = sockaddr_in()
var hp: UnsafeMutablePointer<hostent>? = nil
for i in 0..<10 {
hp = gethostbyname(hostname.cString(using: String.Encoding.utf8)!)
if hp == nil {
print("failed to resolve hostname \(hostname)")
herror("resolv")
if i == 9 {
super.init(inputStream: nil, outputStream: nil) // have to init before throwing
throw TSSLSocketTransportError(error: .hostanameResolution(hostname: hostname))
}
Thread.sleep(forTimeInterval: 0.2)
} else {
break
}
}
pin.sin_family = UInt8(AF_INET)
pin.sin_addr = in_addr(s_addr: UInt32((hp?.pointee.h_addr_list.pointee?.pointee)!)) // Is there a better way to get this???
pin.sin_port = htons(port)
/* create the socket */
sd = socket(Int32(AF_INET), Int32(SOCK_STREAM), Int32(IPPROTO_TCP))
if sd == -1 {
super.init(inputStream: nil, outputStream: nil) // have to init before throwing
throw TSSLSocketTransportError(error: .socketCreate(port: Int(port)))
}
/* open a connection */
// need a non-self ref to sd, otherwise the j complains
let sd_local = sd
let connectResult = withUnsafePointer(to: &pin) {
connect(sd_local, UnsafePointer<sockaddr>(OpaquePointer($0)), socklen_t(MemoryLayout<sockaddr_in>.size))
}
if connectResult == -1 {
super.init(inputStream: nil, outputStream: nil) // have to init before throwing
throw TSSLSocketTransportError(error: .connect)
}
CFStreamCreatePairWithSocket(kCFAllocatorDefault, sd, &readStream, &writeStream)
CFReadStreamSetProperty(readStream?.takeRetainedValue(), .socketNativeHandle, kCFBooleanTrue)
CFWriteStreamSetProperty(writeStream?.takeRetainedValue(), .socketNativeHandle, kCFBooleanTrue)
var inputStream: InputStream? = nil
var outputStream: OutputStream? = nil
if readStream != nil && writeStream != nil {
CFReadStreamSetProperty(readStream?.takeRetainedValue(),
.socketSecurityLevel,
kCFStreamSocketSecurityLevelTLSv1)
let settings: [String: Bool] = [kCFStreamSSLValidatesCertificateChain as String: true]
CFReadStreamSetProperty(readStream?.takeRetainedValue(),
.SSLSettings,
settings as CFTypeRef)
CFWriteStreamSetProperty(writeStream?.takeRetainedValue(),
.SSLSettings,
settings as CFTypeRef)
inputStream = readStream!.takeRetainedValue()
inputStream?.schedule(in: .current, forMode: .default)
inputStream?.open()
outputStream = writeStream!.takeRetainedValue()
outputStream?.schedule(in: .current, forMode: .default)
outputStream?.open()
readStream?.release()
writeStream?.release()
}
super.init(inputStream: inputStream, outputStream: outputStream)
self.input?.delegate = self
self.output?.delegate = self
}
func recoverFromTrustFailure(_ myTrust: SecTrust, lastTrustResult: SecTrustResultType) -> Bool {
let trustTime = SecTrustGetVerifyTime(myTrust)
let currentTime = CFAbsoluteTimeGetCurrent()
let timeIncrement = 31536000 // from TSSLSocketTransport.m
let newTime = currentTime - Double(timeIncrement)
if trustTime - newTime != 0 {
let newDate = CFDateCreate(nil, newTime)
SecTrustSetVerifyDate(myTrust, newDate!)
var tr = lastTrustResult
let success = withUnsafeMutablePointer(to: &tr) { trPtr -> Bool in
if SecTrustEvaluate(myTrust, trPtr) != errSecSuccess {
return false
}
return true
}
if !success { return false }
}
if lastTrustResult == .proceed || lastTrustResult == .unspecified {
return false
}
print("TSSLSocketTransport: Unable to recover certificate trust failure")
return true
}
public func isOpen() -> Bool {
return sd > 0
}
}
extension TSSLSocketTransport: StreamDelegate {
public func stream(_ aStream: Stream, handle eventCode: Stream.Event) {
switch eventCode {
case Stream.Event(): break
case Stream.Event.hasBytesAvailable: break
case Stream.Event.openCompleted: break
case Stream.Event.hasSpaceAvailable:
var proceed = false
var trustResult: SecTrustResultType = .invalid
var newPolicies: CFMutableArray?
repeat {
let trust: SecTrust = aStream.property(forKey: .SSLPeerTrust) as! SecTrust
// Add new policy to current list of policies
let policy = SecPolicyCreateSSL(false, sslHostname as CFString?)
var ppolicy = policy // mutable for pointer
let policies: UnsafeMutablePointer<CFArray?>? = nil
if SecTrustCopyPolicies(trust, policies!) != errSecSuccess {
break
}
withUnsafeMutablePointer(to: &ppolicy) { ptr in
newPolicies = CFArrayCreateMutableCopy(nil, 0, policies?.pointee)
CFArrayAppendValue(newPolicies, ptr)
}
// update trust policies
if SecTrustSetPolicies(trust, newPolicies!) != errSecSuccess {
break
}
// Evaluate the trust chain
let success = withUnsafeMutablePointer(to: &trustResult) { trustPtr -> Bool in
if SecTrustEvaluate(trust, trustPtr) != errSecSuccess {
return false
}
return true
}
if !success {
break
}
switch trustResult {
case .proceed: proceed = true
case .unspecified: proceed = true
case .recoverableTrustFailure:
proceed = self.recoverFromTrustFailure(trust, lastTrustResult: trustResult)
case .deny: break
case .fatalTrustFailure: break
case .otherError: break
case .invalid: break
default: break
}
} while false
if !proceed {
print("TSSLSocketTransport: Cannot trust certificate. Result: \(trustResult)")
aStream.close()
}
case Stream.Event.errorOccurred: break
case Stream.Event.endEncountered: break
default: break
}
}
}
#endif
|
