iOS访问https ssl和tls双向加密

文章已经移到此处：http://www.henishuo.com/ios-https-tls-ssl/

关于https和ssl的原理，请到此处查看：http://blog.163.com/magicc_love/blog/static/185853662201321423527263/

由于项目需求，访问服务是https的，并且使用的是ssl加密方式

下面说明使用MKNetworkit网络库实现的代码：

- (void)testClientCertificate {
  SecIdentityRef identity = NULL;
  SecTrustRef trust = NULL;
  NSString *p12 = [[NSBundle mainBundle] pathForResource:@"testClient" ofType:@"p12"];
  NSData *PKCS12Data = [NSData dataWithContentsOfFile:p12];

  [[self class] extractIdentity:&identity andTrust:&trust fromPKCS12Data:PKCS12Data];

  NSString *url = @"https://218.244.131.231/ManicureShop/api/order/pay/%@";
  NSDictionary *dic = @{@"request" : @{
                            @"orderNo" : @"1409282102222110030643",
                            @"type" : @(2)
                            }
                        };

  _signString = nil;
  NSData *postData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];
  NSString *sign = [self signWithSignKey:@"test" params:dic];
  NSMutableData *body = [postData mutableCopy];
  NSLog(@"%@", [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding]);
  url = [NSString stringWithFormat:url, sign];

  MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"218.244.131.231"];
  MKNetworkOperation *op = [engine operationWithPath:[NSString stringWithFormat:@"/ManicureShop/api/order/pay/%@", sign] params:dic httpMethod:@"POST" ssl:YES];
  op.postDataEncoding = MKNKPostDataEncodingTypeJSON; // 传JOSN

  // 这个是app bundle 路径下的自签证书
  op.clientCertificate = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"testClient.p12"];
  // 这个是自签证书的密码
  op.clientCertificatePassword = @"testHttps";

  // 由于自签名的证书是需要忽略的，所以这里需要设置为YES，表示允许
  op.shouldContinueWithInvalidCertificate = YES;
  [op addCompletionHandler:^(MKNetworkOperation *completedOperation) {
    NSLog(@"%@", completedOperation.responseJSON);
  } errorHandler:^(MKNetworkOperation *completedOperation, NSError *error) {
    NSLog(@"%@", [error description]);
  }];

  [engine enqueueOperation:op];
  return;
}

// 下面这段代码是提取和校验证书的数据的

+ (BOOL)extractIdentity:(SecIdentityRef *)outIdentity andTrust:(SecTrustRef*)outTrust fromPKCS12Data:(NSData *)inPKCS12Data {
  OSStatus securityError = errSecSuccess;

  // 证书密钥
  NSDictionary *optionsDictionary = [NSDictionary dictionaryWithObject:@"testHttps"
                                                                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(@"Failed with error code %d",(int)securityError);
    return NO;
  }
  return YES;
}

下面说明一下使用AFNetworking网络库访问的方式：

- (void)testClientCertificate {
  SecIdentityRef identity = NULL;
  SecTrustRef trust = NULL;
  NSString *p12 = [[NSBundle mainBundle] pathForResource:@"testClient" ofType:@"p12"];
  NSData *PKCS12Data = [NSData dataWithContentsOfFile:p12];

  [[self class] extractIdentity:&identity andTrust:&trust fromPKCS12Data:PKCS12Data];

  NSString *url = @"https://218.244.131.231/ManicureShop/api/order/pay/%@";
  NSDictionary *dic = @{@"request" : @{
                            @"orderNo" : @"1409282102222110030643",
                            @"type" : @(2)
                            }
                        };

  _signString = nil;
  NSData *postData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];
  NSString *sign = [self signWithSignKey:@"test" params:dic];
  NSMutableData *body = [postData mutableCopy];
  NSLog(@"%@", [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding]);
  url = [NSString stringWithFormat:url, sign];

  AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
  manager.requestSerializer = [AFJSONRequestSerializer serializer];
  manager.responseSerializer = [AFJSONResponseSerializer serializer];
  [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
  [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
  manager.responseSerializer.acceptableContentTypes = [NSSet setWithArray:@[@"application/json", @"text/plain"]];
  manager.securityPolicy = [self customSecurityPolicy];

  [manager POST:url parameters:dic success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    NSLog(@"Error: %@", error);
  }];
}

下面这段代码是处理SSL安全性问题的:

/**** SSL Pinning ****/
- (AFSecurityPolicy*)customSecurityPolicy {
  NSString *cerPath = [[NSBundle mainBundle] pathForResource:@"testClient" ofType:@"cer"];
  NSData *certData = [NSData dataWithContentsOfFile:cerPath];
  AFSecurityPolicy *securityPolicy = [AFSecurityPolicy defaultPolicy];
  [securityPolicy setAllowInvalidCertificates:YES];
  [securityPolicy setPinnedCertificates:@[certData]];
  [securityPolicy setSSLPinningMode:AFSSLPinningModeCertificate];
  /**** SSL Pinning ****/
  return securityPolicy;
}

为了实现访问https tls加密方式，我也费了不少时间来查，这里写下此文章，希望对大家有用！