自苹果宣布2017年1月1日开始强制使用https以来，htpps慢慢成为大家讨论的对象之一，不是说此前https没有出现，只是这一决策让得开发者始料未及，博主在15年的时候就做过https的接口，深知此坑之深，原因就是自身对这方面知识不了解加上网上的资料少，除此外还有博客不知对错就互相转载，导致当时网上几乎找不到能用的代码，这一点，博主说的毫不夸张。
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：
3）在afnetworking中修改一个类：
找到这个文件，在里面增加一个方法：
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- (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，
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- (void)connection:(nsurlconnection *)connectionwillsendrequestforauthenticationchallenge:(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
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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：
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：
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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; }]; |
4）发起请求
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//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：
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+(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;} |
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：
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//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。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://blog.csdn.net/codingfire/article/details/53419521
