這里填寫圖片描述

前言

一.單向認(rèn)證
Https在建立Socket連接之前，需要進(jìn)行握手把敢。
1.客戶端向服務(wù)端發(fā)送SSL協(xié)議版本號(hào)、加密算法種類谅辣、隨機(jī)數(shù)等信息修赞。
2.服務(wù)端給客戶端返回SSL協(xié)議版本號(hào)、加密算法種類屈藐、隨機(jī)數(shù)等信息榔组，同時(shí)也返回服務(wù)器端的證書，即公鑰證書
3.客戶端使用服務(wù)端返回的信息驗(yàn)證服務(wù)器的合法性联逻，包括：
證書是否過(guò)期
發(fā)型服務(wù)器證書的CA是否可靠
返回的公鑰是否能正確解開返回證書中的數(shù)字簽名
服務(wù)器證書上的域名是否和服務(wù)器的實(shí)際域名相匹配
驗(yàn)證通過(guò)后搓扯，將繼續(xù)進(jìn)行通信，否則包归，終止通信
4.客戶端向服務(wù)端發(fā)送自己所能支持的對(duì)稱加密方案锨推，供服務(wù)器端進(jìn)行選擇
5.服務(wù)器端在客戶端提供的加密方案中選擇加密程度最高的加密方式。
6.服務(wù)器將選擇好的加密方案通過(guò)明文方式返回給客戶端
7.客戶端接收到服務(wù)端返回的加密方式后公壤，使用該加密方式生成產(chǎn)生隨機(jī)碼换可，用作通信過(guò)程中對(duì)稱加密的密鑰，使用服務(wù)端返回的公鑰進(jìn)行加密厦幅，將加密后的隨機(jī)碼發(fā)送至服務(wù)器
8.服務(wù)器收到客戶端返回的加密信息后沾鳄，使用自己的私鑰進(jìn)行解密，獲取對(duì)稱加密密鑰确憨。
9.在接下來(lái)的會(huì)話中译荞，服務(wù)器和客戶端將會(huì)使用該密碼進(jìn)行對(duì)稱加密瓤的，保證通信過(guò)程中信息的安全。

//AF加上這句和下面的方法
    _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];//這個(gè)mode不行的話可以換吞歼，看枚舉
    [securityPolicy setAllowInvalidCertificates:YES];
    NSSet *set = [NSSet setWithObjects:certData, nil];
    [securityPolicy setPinnedCertificates:@[certData]];
    /**** SSL Pinning ****/
    return securityPolicy;
}

二.雙向認(rèn)證

雙向認(rèn)證和單向認(rèn)證原理基本差不多圈膏，只是除了客戶端需要認(rèn)證服務(wù)端以外，增加了服務(wù)端對(duì)客戶端的認(rèn)證篙骡。
溫馨提示:
證書需要提前準(zhǔn)備好分別是.cer的 和 .p12 的稽坤，別的就很簡(jiǎn)單了。
示例代碼如下：

在UIAHttps.h中

//
//  UIAHttps.h
//  UIADemo
//
//  Created by gupeng on 17/02/22.
//  Copyright ? 2017年 gupeng. All rights reserved.
//
 
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
 
@interface UIAHttps : NSObject
 
+ (UIAHttps *)shared;
 
- (void)POST:(NSString *)urlString
  Dictionary:(NSDictionary *)dic
    progress:(nullable void (^)(NSProgress   *uploadProgress))uploadProgress
     success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
     failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
@end
 
NS_ASSUME_NONNULL_END
在UIAHttps.m中
  //
  //  UIAHttps.m
  //  UIADemo
  //
  //  Created by gupeng on 17/02/22.
  //  Copyright ? 2017年 gupeng. All rights reserved.
  //
 
  #import "UIAHttps.h"
  #import <AFNetworking.h>
 
  @implementation UIAHttps
  static UIAHttps *https = nil;
  + (UIAHttps *)shared {
      static dispatch_once_t onceToken;
      dispatch_once(&onceToken, ^{
          if(https == nil) {
              https = [[UIAHttps alloc] init];
          }       
      });
      return https;
  }
 
  - (void)POST:(NSString *)urlString
    Dictionary:(NSDictionary *)dic
progress:(void (^)(NSProgress * _Nonnull))uploadProgress
 success:(void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success
 failure:(void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
  {
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
//    設(shè)置超時(shí)時(shí)間
[manager.requestSerializer willChangeValueForKey:@"timeoutInterval"];
manager.requestSerializer.timeoutInterval = 30.f;
[manager.requestSerializer didChangeValueForKey:@"timeoutInterval"];
[manager.requestSerializer setValue:@"Content-Type" forHTTPHeaderField:@"application/json; charset=utf-8"];
[manager setSecurityPolicy:[self customSecurityPolicy]];
[self checkCredential:manager];
 
NSData *data = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];
NSString *jsonString = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];   
[manager POST:urlString parameters:jsonString progress:uploadProgress success:success failure:failure];
  }
 
  - (AFSecurityPolicy*)customSecurityPolicy {
AFSecurityPolicy *securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeCertificate];
//tomcat1(1)
NSString * cerPath = [[NSBundle mainBundle] pathForResource:@"server" ofType:@"cer"];
NSData *certData = [NSData dataWithContentsOfFile:cerPath];
NSSet   *dataSet = [NSSet setWithArray:@[certData]];
[securityPolicy setAllowInvalidCertificates:YES];
[securityPolicy setPinnedCertificates:dataSet];
[securityPolicy setValidatesDomainName:YES];
 
return securityPolicy;
  }
 
  //校驗(yàn)證書
  - (void)checkCredential:(AFURLSessionManager *)manager
  {
[manager setSessionDidBecomeInvalidBlock:^(NSURLSession * _Nonnull session, NSError * _Nonnull error) {
}];
__weak typeof(manager)weakManager = manager;
[manager setSessionDidReceiveAuthenticationChallengeBlock:^NSURLSessionAuthChallengeDisposition(NSURLSession*session, NSURLAuthenticationChallenge *challenge, NSURLCredential *__autoreleasing*_credential) {
    NSURLSessionAuthChallengeDisposition disposition = NSURLSessionAuthChallengePerformDefaultHandling;
    __autoreleasing NSURLCredential *credential =nil;
    NSLog(@"authenticationMethod=%@",challenge.protectionSpace.authenticationMethod);
    //判斷是核驗(yàn)客戶端證書還是服務(wù)器證書
    if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
        // 基于客戶端的安全策略來(lái)決定是否信任該服務(wù)器糯俗，不信任的話尿褪，也就沒必要響應(yīng)挑戰(zhàn)
        if([weakManager.securityPolicy evaluateServerTrust:challenge.protectionSpace.serverTrust forDomain:challenge.protectionSpace.host]) {
            // 創(chuàng)建挑戰(zhàn)證書（注：挑戰(zhàn)方式為UseCredential和PerformDefaultHandling都需要新建挑戰(zhàn)證書）
            NSLog(@"serverTrust=%@",challenge.protectionSpace.serverTrust);
            credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];
            // 確定挑戰(zhàn)的方式
            if (credential) {
                //證書挑戰(zhàn)  設(shè)計(jì)policy,none，則跑到這里
                disposition = NSURLSessionAuthChallengeUseCredential;
            } else {
                disposition = NSURLSessionAuthChallengePerformDefaultHandling;
            }
        } else {
            disposition = NSURLSessionAuthChallengeCancelAuthenticationChallenge;
        }
    } else {
        // client authentication
        SecIdentityRef identity = NULL;
        SecTrustRef trust = NULL;
        NSString *p12 = [[NSBundle mainBundle] pathForResource:@"app"ofType:@"p12"];
        NSFileManager *fileManager =[NSFileManager defaultManager];
 
        if(![fileManager fileExistsAtPath:p12])
        {
            NSLog(@"client.p12:not exist");
        }
        else
        {
            NSData *PKCS12Data = [NSData dataWithContentsOfFile:p12];
 
            if ([self 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;
}];
  }
 
  //讀取p12文件中的密碼
  - (BOOL)extractIdentity:(SecIdentityRef*)outIdentity andTrust:(SecTrustRef *)outTrust fromPKCS12Data:(NSData *)inPKCS12Data {
OSStatus securityError = errSecSuccess;
//client certificate password
NSDictionary *optionsDictionary = [NSDictionary dictionaryWithObject:@"123456"
                                                             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;
  }
  @end
 
 

在viewController.m中即可調(diào)用

//  ViewController.m
//  HttpsDemo
//
//  Created by gupeng on 17/02/22.
//  Copyright ? 2017年 gupeng. All rights reserved.
//

#import "ViewController.h"
#import "UIAHttps.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
   [super viewDidLoad];
   NSDictionary *dic = @{
                   @"cardno":@"411321199311083311",
                   @"mobile":@"15726618328",
                   @"msgtype":@"0002",
                   @"name":@"小張",
                   @"password":@"FCE98C9B0907B94978AF97358F9FA442",
               @"signature":@"B1E0507EA0C356719E0D5F900AAB9B0D85D3C62F2881C89777A0F7894C57DE5FB1C6B4D87E452D0053A9B0C69F87F4FA91B7B6ECE3ABAE816CF7EEADBBE5722C8F1BB01406C61073D9941E985CED39B01E95D141D3E81FBD285A410E52806601B9C0C8D470932FD71CA3C660CCEF14C57DCF089B877B7213B5DF2D7BA18488BA5B3743",
                   @"username":@"1001100112"
                   };
//此字典格式為我們公司 服務(wù)器需要的格式叶骨，只需按照自己的需求改動(dòng)即可
   [[UIAHttps shared]POST:@"https://172.16.40.71:15025" Dictionary:dic progress:^(NSProgress * _Nonnull uploadProgress) {

} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
 NSLog(@"發(fā)送成功");
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
 NSLog(@"發(fā)送失敗");
}];
}

- (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
   // Dispose of any resources that can be recreated.
}

@end