iOS开发 - 用AFNetworking实现https单向验证,双向验证

https相关鉴于此,博主一直想填一下这个坑,多增加一些正确的代码,来供广大开发者使用,后来一直被搁置,经过尝试后,博主现将整理好的代码发布在这里,希望能帮到焦急寻找的开发者。1.先来说说老的AFNetworking2.x怎么来实现的 
博主在网上看过几篇帖子,其中说的一些方法是正确的,但是却并不全对,由于那几篇博客几乎一样,博主不能确定最早的那篇是谁写的,所以就重新在下面说明下方法:1)倒入client.p12证书;2)在plist文件做如图配置: 
这里写图片描述
各个项代表的含义请看这篇博客,博主写的很详细: 除了一些说明,对方也提供了一些代码,大家可以拿来相互印证;3)在AFNetworking中修改一个类: 
这里写图片描述 
找到这个文件,在里面增加一个方法:- (OSStatus)extractIdentity:(CFDataRef)inP12Data toIdentity:(SecIdentityRef*)identity { OSStatus securityError = errSecSuccess; CFStringRef password = CFSTR("证书密码"); const void *keys[] = { kSecImportExportPassphrase }; const void *values[] = { password }; CFDictionaryRef options = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL); CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL); securityError = SecPKCS12Import(inP12Data, options, &items); if (securityError == 0) { CFDictionaryRef ident = CFArrayGetValueAtIndex(items,0); const void *tempIdentity = NULL; tempIdentity = CFDictionaryGetValue(ident, kSecImportItemIdentity); *identity = (SecIdentityRef)tempIdentity; } if (options) { CFRelease(options); } return securityError; }  再修改一个方法:用下面的这段代码替换NSURLConnectionDelegate中的同名代码, - (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge { NSString *thePath = [[NSBundle mainBundle] pathForResource:@"client" ofType:@"p12"]; //倒入证书 NSLog(@"thePath===========%@",thePath); NSData *PKCS12Data = [[NSData alloc] initWithContentsOfFile:thePath]; CFDataRef inPKCS12Data = (__bridge CFDataRef)PKCS12Data; SecIdentityRef identity = NULL; // extract the ideneity from the certificate [self extractIdentity :inPKCS12Data toIdentity:&identity]; SecCertificateRef certificate = NULL; SecIdentityCopyCertificate (identity, &certificate); const void *certs[] = {certificate}; // CFArrayRef certArray = CFArrayCreate(kCFAllocatorDefault, certs, 1, NULL); // create a credential from the certificate and ideneity, then reply to the challenge with the credential //NSLog(@"identity=========%@",identity); NSURLCredential *credential = [NSURLCredential credentialWithIdentity:identity certificates:nil persistence:NSURLCredentialPersistencePermanent]; // credential = [NSURLCredential credentialWithIdentity:identity certificates:(__bridge NSArray*)certArray persistence:NSURLCredentialPersistencePermanent]; [challenge.sender useCredential:credential forAuthenticationChallenge:challenge]; } 4)发起请求 NSString *url = @"xxxxxxxxxx"; // 1.获得请求管理者 AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager]; //2设置https 请求 AFSecurityPolicy *securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeCertificate]; securityPolicy.allowInvalidCertificates = YES; mgr.securityPolicy = securityPolicy; // 3.发送POST请求 [mgr POST:url parameters:nil success:^(AFHTTPRequestOperation * _Nonnull operation, id _Nonnull responseObject) { NSLog(@"responseObject: %@", responseObject); } failure:^(AFHTTPRequestOperation * _Nonnull operation, NSError * _Nonnull error) { NSLog(@"Error: %@", error); }];   
到此,老版的AFNetworking请求https接口的双向验证就做完了,但是有一个问题,这里需要改动AFNetworking的代码,何况新的AFNetworking已经有了,为了保持代码的活力,老的应该摒弃的,而且更新pods后肯定替换的代码就没了,也是一个问题,不要急,下面来说说怎么用新的AFNetworking,并解决被pods更新替换代码的问题。 最后再说一点,使用老的AF来请求,只用到了client.p12文件,并没有用到server.cer,在新的里面是有用到的,猜测可能是客户端选择信任任何证书导致的,就变成了单向的验证。Demo放在最后2.来说说新的AFNetworking3.x怎么来实现的1)倒入client.p12和server.cer文件 
2)plist内的设置,这是和上面一样的: 
这里写图片描述
各个项代表的含义请看这篇博客,博主写的很详细: 除了一些说明,对方也提供了一些代码,大家可以拿来相互印证;3)这里可不需要修改类里面的代码,但是这里需要重写一个方法: NSString *url = @"https://test.niuniuhaoguanjia.com/3.0.0/?service=City.GetCityList"; NSString *certFilePath = [[NSBundle mainBundle] pathForResource:@"server" ofType:@"cer"]; NSData *certData = [NSData dataWithContentsOfFile:certFilePath]; NSSet *certSet = [NSSet setWithObject:certData]; AFSecurityPolicy *policy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeCertificate withPinnedCertificates:certSet]; policy.allowInvalidCertificates = YES; policy.validatesDomainName = NO; _manager = [AFHTTPSessionManager manager]; _manager.securityPolicy = policy; _manager.requestSerializer = [AFHTTPRequestSerializer serializer]; _manager.responseSerializer = [AFHTTPResponseSerializer serializer]; _manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript",@"text/plain", nil]; //关闭缓存避免干扰测试r _manager.requestSerializer.cachePolicy = NSURLRequestReloadIgnoringLocalCacheData; [_manager setSessionDidBecomeInvalidBlock:^(NSURLSession * _Nonnull session, NSError * _Nonnull error) { NSLog(@"setSessionDidBecomeInvalidBlock"); }]; //客户端请求验证 重写 setSessionDidReceiveAuthenticationChallengeBlock 方法 __weak typeof(self)weakSelf = self; [_manager setSessionDidReceiveAuthenticationChallengeBlock:^NSURLSessionAuthChallengeDisposition(NSURLSession*session, NSURLAuthenticationChallenge *challenge, NSURLCredential *__autoreleasing*_credential) { NSURLSessionAuthChallengeDisposition disposition = NSURLSessionAuthChallengePerformDefaultHandling; __autoreleasing NSURLCredential *credential =nil; if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) { if([weakSelf.manager.securityPolicy evaluateServerTrust:challenge.protectionSpace.serverTrust forDomain:challenge.protectionSpace.host]) { credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]; if(credential) { disposition =NSURLSessionAuthChallengeUseCredential; } else { disposition =NSURLSessionAuthChallengePerformDefaultHandling; } } else { disposition = NSURLSessionAuthChallengeCancelAuthenticationChallenge; } } else { // client authentication SecIdentityRef identity = NULL; SecTrustRef trust = NULL; NSString *p12 = [[NSBundle mainBundle] pathForResource:@"client"ofType:@"p12"]; NSFileManager *fileManager =[NSFileManager defaultManager]; if(![fileManager fileExistsAtPath:p12]) { NSLog(@"client.p12:not exist"); } else { NSData *PKCS12Data = [NSData dataWithContentsOfFile:p12]; if ([[weakSelf class]extractIdentity:&identity andTrust:&trust fromPKCS12Data:PKCS12Data]) { SecCertificateRef certificate = NULL; SecIdentityCopyCertificate(identity, &certificate); const void*certs[] = {certificate}; CFArrayRef certArray =CFArrayCreate(kCFAllocatorDefault, certs,1,NULL); credential =[NSURLCredential credentialWithIdentity:identity certificates:(__bridge NSArray*)certArray persistence:NSURLCredentialPersistencePermanent]; disposition =NSURLSessionAuthChallengeUseCredential; } } } *_credential = credential; return disposition; }];  关于这段代码,其实和老的AF里面修改的道理是一样的,可以看下这篇文章:4)发起请求//第三步和这一步代码是放在一起的,请注意哦 [_manager GET:url parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) { } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil]; NSLog(@"JSON: %@", dic); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { NSLog(@"Error: %@", error); NSData *data = [error.userInfo objectForKey:@"com.alamofire.serialization.response.error.data"]; NSString *str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"%@",str); }];  另外还要加上一个方法:+(BOOL)extractIdentity:(SecIdentityRef*)outIdentity andTrust:(SecTrustRef *)outTrust fromPKCS12Data:(NSData *)inPKCS12Data { OSStatus securityError = errSecSuccess; //client certificate password NSDictionary*optionsDictionary = [NSDictionary dictionaryWithObject:@"证书密码" forKey:(__bridge id)kSecImportExportPassphrase]; CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL); securityError = SecPKCS12Import((__bridge CFDataRef)inPKCS12Data,(__bridge CFDictionaryRef)optionsDictionary,&items); if(securityError == 0) { CFDictionaryRef myIdentityAndTrust =CFArrayGetValueAtIndex(items,0); const void*tempIdentity =NULL; tempIdentity= CFDictionaryGetValue (myIdentityAndTrust,kSecImportItemIdentity); *outIdentity = (SecIdentityRef)tempIdentity; const void*tempTrust =NULL; tempTrust = CFDictionaryGetValue(myIdentityAndTrust,kSecImportItemTrust); *outTrust = (SecTrustRef)tempTrust; } else { NSLog(@"Failedwith error code %d",(int)securityError); return NO; } return YES; } 你会发现 这里的代码有冗余,没错,我们是要封装一下,可是要怎么封装呢?博主尝试了集中都失败了,真是百思不得解,相信主动去封装的开发者也会碰到封装后请求失败的问题,也许你成功了,但是这里需要注意一个在block内使用变量的问题,具体的可以去看博主怎么封装的。 
到这里,新的AF请求https就已经结束了,想看封装的,Demo放在最后。 3.单向验证 
说到这个,不得不说一下网上的很多方法,都把单向验证当作双向的,其实也是并不理解其原理,关于原理,请看这里 
代码实现AF都是一样的://AF加上这句和下面的方法 _manager.securityPolicy = [self customSecurityPolicy]; /**** SSL Pinning ****/ - (AFSecurityPolicy*)customSecurityPolicy { NSString *cerPath = [[NSBundle mainBundle] pathForResource:@"server" ofType:@"cer"]; NSData *certData = [NSData dataWithContentsOfFile:cerPath]; AFSecurityPolicy *securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeCertificate]; [securityPolicy setAllowInvalidCertificates:YES]; NSSet *set = [NSSet setWithObjects:certData, nil]; [securityPolicy setPinnedCertificates:@[certData]]; /**** SSL Pinning ****/ return securityPolicy; }4.Demo下载福利因为证书安全问题,Demo 里的证书博主删除了,请见谅,请大家放入自己的证书。 
老的AF访问httpsDemo新的AF访问httpsDemo

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