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
|
#import "MGLAPIClient.h"
#import "NSBundle+MGLAdditions.h"
#import "NSData+MGLAdditions.h"
#import "MGLAccountManager.h"
static NSString * const MGLAPIClientUserAgentBase = @"MapboxEventsiOS";
static NSString * const MGLAPIClientBaseURL = @"https://events.mapbox.com";
static NSString * const MGLAPIClientEventsPath = @"events/v2";
static NSString * const MGLAPIClientHeaderFieldUserAgentKey = @"User-Agent";
static NSString * const MGLAPIClientHeaderFieldContentTypeKey = @"Content-Type";
static NSString * const MGLAPIClientHeaderFieldContentTypeValue = @"application/json";
static NSString * const MGLAPIClientHeaderFieldContentEncodingKey = @"Content-Encoding";
static NSString * const MGLAPIClientHTTPMethodPost = @"POST";
@interface MGLAPIClient ()
@property (nonatomic, copy) NSURLSession *session;
@property (nonatomic, copy) NSURL *baseURL;
@property (nonatomic, copy) NSData *digicertCert_2016;
@property (nonatomic, copy) NSData *geoTrustCert_2016;
@property (nonatomic, copy) NSData *digicertCert_2017;
@property (nonatomic, copy) NSData *geoTrustCert_2017;
@property (nonatomic, copy) NSData *testServerCert;
@property (nonatomic, copy) NSString *userAgent;
@property (nonatomic) BOOL usesTestServer;
@end
@implementation MGLAPIClient
- (instancetype)init {
self = [super init];
if (self) {
_session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]
delegate:self delegateQueue:nil];
[self loadCertificates];
[self setupBaseURL];
[self setupUserAgent];
}
return self;
}
#pragma mark Public API
- (void)postEvents:(nonnull NS_ARRAY_OF(MGLMapboxEventAttributes *) *)events completionHandler:(nullable void (^)(NSError * _Nullable error))completionHandler {
__block NSURLSessionDataTask *dataTask = [self.session dataTaskWithRequest:[self requestForEvents:events]
completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
NSError *statusError = nil;
if (httpResponse.statusCode >= 400) {
NSString *description = [NSString stringWithFormat:NSLocalizedStringWithDefaultValue(@"API_CLIENT_400_DESC", nil, nil, @"The session data task failed. Original request was: %@", nil), dataTask.originalRequest];
NSString *reason = [NSString stringWithFormat:NSLocalizedStringWithDefaultValue(@"API_CLIENT_400_REASON", nil, nil, @"The status code was %ld", nil), (long)httpResponse.statusCode];
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: description,
NSLocalizedFailureReasonErrorKey: reason};
statusError = [NSError errorWithDomain:MGLErrorDomain code:1 userInfo:userInfo];
}
if (completionHandler) {
error = error ?: statusError;
completionHandler(error);
}
dataTask = nil;
}];
[dataTask resume];
}
- (void)postEvent:(nonnull MGLMapboxEventAttributes *)event completionHandler:(nullable void (^)(NSError * _Nullable error))completionHandler {
[self postEvents:@[event] completionHandler:completionHandler];
}
#pragma mark Utilities
- (NSURLRequest *)requestForEvents:(NS_ARRAY_OF(MGLMapboxEventAttributes *) *)events {
NSString *path = [NSString stringWithFormat:@"%@?access_token=%@", MGLAPIClientEventsPath, [MGLAccountManager accessToken]];
NSURL *url = [NSURL URLWithString:path relativeToURL:self.baseURL];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setValue:self.userAgent forHTTPHeaderField:MGLAPIClientHeaderFieldUserAgentKey];
[request setValue:MGLAPIClientHeaderFieldContentTypeValue forHTTPHeaderField:MGLAPIClientHeaderFieldContentTypeKey];
[request setHTTPMethod:MGLAPIClientHTTPMethodPost];
NSData *jsonData = [self serializedDataForEvents:events];
// Compressing less than 3 events can have a negative impact on the size.
if (events.count > 2) {
NSData *compressedData = [jsonData mgl_compressedData];
[request setValue:@"deflate" forHTTPHeaderField:MGLAPIClientHeaderFieldContentEncodingKey];
[request setHTTPBody:compressedData];
}
// Set JSON data if events.count were less than 3 or something went wrong with compressing HTTP body data.
if (!request.HTTPBody) {
[request setValue:nil forHTTPHeaderField:MGLAPIClientHeaderFieldContentEncodingKey];
[request setHTTPBody:jsonData];
}
return [request copy];
}
- (void)setupBaseURL {
NSString *testServerURLString = [[NSUserDefaults standardUserDefaults] stringForKey:@"MGLTelemetryTestServerURL"];
NSURL *testServerURL = [NSURL URLWithString:testServerURLString];
if (testServerURL && [testServerURL.scheme isEqualToString:@"https"]) {
self.baseURL = testServerURL;
self.usesTestServer = YES;
} else {
self.baseURL = [NSURL URLWithString:MGLAPIClientBaseURL];
}
}
- (void)loadCertificates {
NSData *certificate;
[self loadCertificate:&certificate withResource:@"api_mapbox_com-geotrust_2016"];
self.geoTrustCert_2016 = certificate;
[self loadCertificate:&certificate withResource:@"api_mapbox_com-digicert_2016"];
self.digicertCert_2016 = certificate;
[self loadCertificate:&certificate withResource:@"api_mapbox_com-geotrust_2017"];
self.geoTrustCert_2017 = certificate;
[self loadCertificate:&certificate withResource:@"api_mapbox_com-digicert_2017"];
self.digicertCert_2017 = certificate;
[self loadCertificate:&certificate withResource:@"api_mapbox_staging"];
self.testServerCert = certificate;
}
- (void)loadCertificate:(NSData **)certificate withResource:(NSString *)resource {
NSBundle *frameworkBundle = [NSBundle mgl_frameworkBundle];
NSString *cerPath = [frameworkBundle pathForResource:resource ofType:@"der"];
if (cerPath != nil) {
*certificate = [NSData dataWithContentsOfFile:cerPath];
}
}
- (void)setupUserAgent {
NSString *appName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleIdentifier"];
NSString *appVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];
NSString *appBuildNumber = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"];
NSString *semanticVersion = [NSBundle mgl_frameworkInfoDictionary][@"MGLSemanticVersionString"];
NSString *shortVersion = [NSBundle mgl_frameworkInfoDictionary][@"CFBundleShortVersionString"];
NSString *sdkVersion = semanticVersion ?: shortVersion;
_userAgent = [NSString stringWithFormat:@"%@/%@/%@ %@/%@", appName, appVersion, appBuildNumber, MGLAPIClientUserAgentBase, sdkVersion];
}
#pragma mark - JSON Serialization
- (NSData *)serializedDataForEvents:(NS_ARRAY_OF(MGLMapboxEventAttributes *) *)events {
return [NSJSONSerialization dataWithJSONObject:events options:0 error:nil];
}
#pragma mark NSURLSessionDelegate
- (BOOL)evaluateCertificateWithCertificateData:(NSData *)certificateData keyCount:(CFIndex)keyCount serverTrust:(SecTrustRef)serverTrust challenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^) (NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
for (int lc = 0; lc < keyCount; lc++) {
SecCertificateRef certificate = SecTrustGetCertificateAtIndex(serverTrust, lc);
NSData *remoteCertificateData = CFBridgingRelease(SecCertificateCopyData(certificate));
if ([remoteCertificateData isEqualToData:certificateData]) {
completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
return YES;
}
}
return NO;
}
- (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^) (NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
SecTrustRef serverTrust = [[challenge protectionSpace] serverTrust];
SecTrustResultType trustResult;
// Validate the certificate chain with the device's trust store anyway this *might* use revocation checking
SecTrustEvaluate(serverTrust, &trustResult);
BOOL found = NO; // For clarity; we start in a state where the challange has not been completed and no certificate has been found
if (trustResult == kSecTrustResultUnspecified) {
// Look for a pinned certificate in the server's certificate chain
CFIndex numKeys = SecTrustGetCertificateCount(serverTrust);
// Check certs in the following order: digicert 2016, digicert 2017, geotrust 2016, geotrust 2017
found = [self evaluateCertificateWithCertificateData:self.digicertCert_2016 keyCount:numKeys serverTrust:serverTrust challenge:challenge completionHandler:completionHandler];
if (!found) {
found = [self evaluateCertificateWithCertificateData:self.digicertCert_2017 keyCount:numKeys serverTrust:serverTrust challenge:challenge completionHandler:completionHandler];
}
if (!found) {
found = [self evaluateCertificateWithCertificateData:self.geoTrustCert_2016 keyCount:numKeys serverTrust:serverTrust challenge:challenge completionHandler:completionHandler];
}
if (!found) {
found = [self evaluateCertificateWithCertificateData:self.geoTrustCert_2017 keyCount:numKeys serverTrust:serverTrust challenge:challenge completionHandler:completionHandler];
}
// If challenge can't be completed with any of the above certs, then try the test server if the app is configured to use the test server
if (!found && _usesTestServer) {
found = [self evaluateCertificateWithCertificateData:self.testServerCert keyCount:numKeys serverTrust:serverTrust challenge:challenge completionHandler:completionHandler];
}
}
if (!found) {
// No certificate was found so cancel the connection.
completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
}
}
}
@end
|
