漫谈iOS RSA非对称加密与解密
来源：互联网 发布：线切割3b编程软件 编辑：程序博客网 时间：2024/06/06 02:33
转自 标哥的 http://www.henishuo.com/talk-about-rsa-encrypt-decrypt/
与大家一起学习
前言
最近公司的客户端安全性出现了严重的问题，如今这个出解决方案并自我测试验证可行性的重任落在了我的身上，学习了很多他人的文章，再经过多次讨论，最后才确定最终解决方案。笔者在这里讲讲这一经历中所需要了解的知识。
iOS客户端想要加密传输数据以防被窃取，最可靠的方式莫过于使用公钥加密算法加密，使用HTTPS协议在整个传输过程中都使用了这个技术，对于未能使用HTTPS的HTTP接口，我们能否实现RSA加密呢？
PHP端实现解密可参考：iOS与PHP端实现RSA非对称加密解密
提示：本篇文章只讲
RSA非对称加密相关知识。
RSA非对称加密介绍
非对称加密算法可能是世界上最重要的算法，它是当今电子商务等领域的基石。简而言之，非对称加密就是指加密公钥和解密密钥是不同的，而且加密公钥和解密密钥是成对出现。非对称加密又叫公钥加密，也就是说成对的密钥，其中一个是对外公开的，所有人都可以获得，人们称之为公钥；而与之相对应的称为私钥，只有这对密钥的生成者才能拥有。
公钥私钥具有以下重要特性：
对于一个私钥，有且只有一个与之对应的公钥。公钥公开给任何人，私钥通常是只有生成者拥有。公/私钥通常是1024位或者2048位，越长安全系数越高，但是解密越困难。尽管拿到了公钥，如果没有私钥，要想解密那几乎是不可能的，至少现在在世界上还没有人公开出来说成功解密的。
非对称加密算法如此强大可靠，却有一个弊端，就是加解密比较耗时。因此，在实际使用中，往往与对称加密和摘要算法结合使用。对称加密很好理解，本篇文章不细读对称加密。我们再来看一下摘要算法。
RSA非对称加密典型用法
- 防止中间人攻击：将明文通过接收人的公钥加密，传输给接收人，因为只有接收人拥有对应的私钥，别人不可能拥有或者不可能通过公钥推算出私钥，所以传输过程中无法被中间人截获。只有拥有私钥的接收人才能解密得到原文。此用法通常用于交换对称密钥。比如，在登录时在客户端生成随机密钥，然后使用公钥加密传输到服务端，服务端使用私钥解密得到随机密钥，此密钥就用于后续的
AES加密/解密使用。 - 身份验证和防止篡改：通常会将所有的参数按照某种规则拼接并排序，然后使用某种算法加密生成摘要，然后在服务端使用同样的规则生成摘要，比较两个摘要以确定身份和是否被篡改过。
摘要算法
上面提到摘要算法，摘要算法是指可以将任意长度的文本，通过一个算法，得到一个固定长度的文本。这里文本不一定只是文本，可以是字节数据。所以摘要算法可以将很长的内容变成一个固定长度的东西。
摘要算法具有以下重要特性：
- 只要源内容不同，计算得到的结果，必然不同。
- 无法通过摘要算法可逆拿到源内容
典型的摘要算法有大名鼎鼎的MD5和SHA。摘要算法主要用于比对信息源是否一致，因为只要源内容发生变化，得到的摘要必然不同；而且通常结果要比源短很多，所以称为“摘要信息”。
数字签名
理解了非对称加密和摘要算法，来看一下数字签名，实际上数字签名就是两者结合。现在假设我们需要传输好几个参数，如何确定接口中所传输的参数值是否被篡改过？这时候数字签名就可以解决这个问题了。
常用的解决办法：将参数按照指定的规则拼接（拼接规则要与服务端协商统一），然后排序（保证服务端的顺序与客户端的一致），然后通过摘要算法如MD5得到摘要信息，再通过AES加密摘要信息，服务端按照同样的规则，生成摘要，然后比对是否一致。
温馨提示：专业叫数字签名，实际工作中大家都叫加盐防篡改。
CA签发证书
实际上，数字证书就是通过数字签名实现的数字化的证书。在一般的证书组成部分中还加入了其他的信息，比如证书有效期，公司组织名称等，过了有效期需要重新签发。
跟现实生活中的签发机构一样，数字证书的签发机构也有若干，并有不同的用处。比如苹果公司就可以签发跟苹果公司有关的证书，而跟web访问有关的证书则是由几家全世界公认的机构进行签发。这些签发机构称为CA（Certificate Authority）。
对于被签发人，通常都是企业或开发者。对于需要搭建基于SSL的网站，那么需要从几家国际公认的CA去申请证书；对如需要开发iOS的应用程序，需要从苹果公司获得相关的证书。这些申请通常是企业或者开发者个人提交给CA的。当然申请所需要的材料、资质和费用都各不相同，是由这些CA制定的，比如苹果要求$99或者$299的费用。
web应用相关的SSL证书的验证方通常是浏览器；iOS各种证书的验证方是iOS设备。我们之所以必须从CA处申请证书，就是因为CA已经将整个验证过程规定好了。
生成自签名证书
<code class="hljs lasso has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 生成1024位私钥</span>openssl genrsa <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-out</span> private_key<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>pem <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">1024</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 根据私钥生成CSR文件</span>openssl req <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-new</span> <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-key</span> private_key<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>pem <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-out</span> rsaCertReq<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>csr<span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 根据私钥和CSR文件生成crt文件</span>openssl x509 <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-req</span> <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-days</span> <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">3650</span> <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-in</span> rsaCertReq<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>csr <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-signkey</span> private_key<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>pem <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-out</span> rsaCert<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>crt<span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 为IOS端生成公钥der文件</span>openssl x509 <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-outform</span> der <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-in</span> rsaCert<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>crt <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-out</span> public_key<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>der<span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 将私钥导出为这p12文件</span>openssl pkcs12 <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-export</span> <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-out</span> private_key<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>p12 <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-inkey</span> private_key<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>pem <span class="hljs-attribute" style="margin: 0px; padding: 0px; box-sizing: border-box;">-in</span> rsaCert<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.</span>crt</code><ul class="pre-numbering" style="margin: 0px; padding: 6px 0px 40px; box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">1</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">2</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">3</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">4</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">5</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">6</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">7</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">8</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">9</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">10</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">11</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">12</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">13</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">14</li></ul>
注意：在生成私钥时，是需要密码的，一定要记住密码。
得到了public_key.der公钥和private_key.p12私钥，就可以进行加密和解密了。
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *encryptString = [<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">self</span> rsaEncryptText:@<span class="hljs-string" style="margin: 0px; padding: 0px; color: rgb(0, 136, 0); box-sizing: border-box;">"123456好哇好哇哈"</span>];<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="margin: 0px; padding: 0px; color: rgb(0, 136, 0); box-sizing: border-box;">"加密：123456好哇好哇哈：%@"</span>, encryptString);<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="margin: 0px; padding: 0px; color: rgb(0, 136, 0); box-sizing: border-box;">"解密结果为：%@"</span>, [<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">self</span> rsaDecryptWithText:encryptString]);</code><ul class="pre-numbering" style="margin: 0px; padding: 6px 0px 40px; box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">1</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">2</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">3</li></ul>
公开HYBRSAEncrypt
请注意，代码中直接放到工程并不能直接使用，有部分转成base64字符串的方法是一个扩展，自己替换成你们自己的方法就可以了。代码有部分是参考他人的。如果觉得是您写的，或者与您的相同，不希望公开可给我邮件。
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">//</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// HYBRSAEncrypt.h</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">//</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// Created by huangyibiao on 15/12/16.</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// Copyright © 2015年 edu.huangyibiao.com. All rights reserved.</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">//</span><span class="hljs-preprocessor" style="margin: 0px; padding: 0px; color: rgb(68, 68, 68); box-sizing: border-box;">#import <span class="hljs-title" style="margin: 0px; padding: 0px; box-sizing: border-box;"><Foundation/Foundation.h></span></span><span class="hljs-class" style="margin: 0px; padding: 0px; box-sizing: border-box;"><span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="margin: 0px; padding: 0px; box-sizing: border-box; color: rgb(102, 0, 102);">HYBRSAEncrypt</span> : <span class="hljs-title" style="margin: 0px; padding: 0px; box-sizing: border-box; color: rgb(102, 0, 102);">NSObject</span></span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 加密相关</span>- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPublicKeyWithPath:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)derFilePath;- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPublicKeyWithData:(NSData *)derData;- (<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)rsaEncryptText:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)text;- (NSData *)rsaEncryptData:(NSData *)data;<span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// 解密相关</span>- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPrivateKeyWithPath:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)p12FilePath password:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)p12Password;- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPrivateKeyWithData:(NSData *)p12Data password:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)p12Password;- (<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)rsaDecryptText:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)text;- (NSData *)rsaDecryptData:(NSData *)data;<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="margin: 0px; padding: 6px 0px 40px; box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">1</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">2</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">3</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">4</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">5</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">6</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">7</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">8</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">9</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">10</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">11</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">12</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">13</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">14</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">15</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">16</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">17</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">18</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">19</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">20</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">21</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">22</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">23</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">24</li></ul>
实现文件中，有几个API是本人的扩展方法，请替换成你们所封装的API：
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">//</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// HYBRSAEncrypt.m</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">//</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// Created by huangyibiao on 15/12/16.</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// Copyright © 2015年 edu.huangyibiao.com. All rights reserved.</span><span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">//</span><span class="hljs-preprocessor" style="margin: 0px; padding: 0px; color: rgb(68, 68, 68); box-sizing: border-box;">#import <span class="hljs-title" style="margin: 0px; padding: 0px; box-sizing: border-box;">"HYBRSAEncrypt.h"</span></span><span class="hljs-class" style="margin: 0px; padding: 0px; box-sizing: border-box;"><span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="margin: 0px; padding: 0px; box-sizing: border-box; color: rgb(102, 0, 102);">HYBRSAEncrypt</span> () {</span> SecKeyRef _publicKey; SecKeyRef _privateKey;}<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">@end</span><span class="hljs-class" style="margin: 0px; padding: 0px; box-sizing: border-box;"><span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="margin: 0px; padding: 0px; box-sizing: border-box; color: rgb(102, 0, 102);">HYBRSAEncrypt</span></span>- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)dealloc { <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (<span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">nil</span> != _publicKey) { CFRelease(_publicKey); } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (<span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">nil</span> != _privateKey) { CFRelease(_privateKey); }}<span class="hljs-preprocessor" style="margin: 0px; padding: 0px; color: rgb(68, 68, 68); box-sizing: border-box;">#pragma mark - 加密相关</span>- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPublicKeyWithPath:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)derFilePath { NSData *derData = [[NSData alloc] initWithContentsOfFile:derFilePath]; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (derData<span class="hljs-variable" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.length</span> > <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) { [<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">self</span> loadPublicKeyWithData:derData]; } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">else</span> { <span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="margin: 0px; padding: 0px; color: rgb(0, 136, 0); box-sizing: border-box;">"load public key fail with path: %@"</span>, derFilePath); }}- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPublicKeyWithData:(NSData *)derData { SecCertificateRef myCertificate = SecCertificateCreateWithData(kCFAllocatorDefault, (__bridge CFDataRef)derData); SecPolicyRef myPolicy = SecPolicyCreateBasicX509(); SecTrustRef myTrust; OSStatus status = SecTrustCreateWithCertificates(myCertificate,myPolicy,&myTrust); SecTrustResultType trustResult; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (status == noErr) { status = SecTrustEvaluate(myTrust, &trustResult); } SecKeyRef securityKey = SecTrustCopyPublicKey(myTrust); CFRelease(myCertificate); CFRelease(myPolicy); CFRelease(myTrust); _publicKey = securityKey;}- (<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)rsaEncryptText:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)text { NSData *encryptedData = [<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">self</span> rsaEncryptData:[text hdf_toData]]; <span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *base64EncryptedString = [<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> hdf_base64StringFromData:encryptedData length:encryptedData<span class="hljs-variable" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.length</span>]; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">return</span> base64EncryptedString;}- (NSData *)rsaEncryptData:(NSData *)data { SecKeyRef key = _publicKey; size_t cipherBufferSize = SecKeyGetBlockSize(key); uint8_t *cipherBuffer = malloc(cipherBufferSize * <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">sizeof</span>(uint8_t)); size_t blockSize = cipherBufferSize - <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">11</span>; size_t blockCount = (size_t)ceil([data length] / (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">double</span>)blockSize); NSMutableData *encryptedData = [[NSMutableData alloc] init] ; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">for</span> (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">int</span> i = <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>; i < blockCount; i++) { size_t bufferSize = MIN(blockSize,[data length] - i * blockSize); NSData *buffer = [data subdataWithRange:NSMakeRange(i * blockSize, bufferSize)]; OSStatus status = SecKeyEncrypt(key, kSecPaddingPKCS1, (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">const</span> uint8_t *)[buffer bytes], [buffer length], cipherBuffer, &cipherBufferSize); <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (status == noErr) { NSData *encryptedBytes = [[NSData alloc] initWithBytes:(<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">const</span> <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span> *)cipherBuffer length:cipherBufferSize]; [encryptedData appendData:encryptedBytes]; } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">else</span> { <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (cipherBuffer) { free(cipherBuffer); } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>; } } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (cipherBuffer){ free(cipherBuffer); } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">return</span> encryptedData;}<span class="hljs-preprocessor" style="margin: 0px; padding: 0px; color: rgb(68, 68, 68); box-sizing: border-box;">#pragma mark - 解密相关</span>- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPrivateKeyWithPath:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)p12FilePath password:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)p12Password { NSData *data = [NSData dataWithContentsOfFile:p12FilePath]; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (data<span class="hljs-variable" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">.length</span> > <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) { [<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">self</span> loadPrivateKeyWithData:data password:p12Password]; } <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">else</span> { <span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="margin: 0px; padding: 0px; color: rgb(0, 136, 0); box-sizing: border-box;">"load private key fail with path: %@"</span>, p12FilePath); }}- (<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)loadPrivateKeyWithData:(NSData *)p12Data password:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)p12Password { SecKeyRef privateKeyRef = <span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">NULL</span>; <span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSMutableDictionary</span> * options = [[<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSMutableDictionary</span> alloc] init]; [options setObject:p12Password forKey:(__bridge <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">id</span>)kSecImportExportPassphrase]; CFArrayRef items = CFArrayCreate(<span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">NULL</span>, <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>, <span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">NULL</span>); OSStatus securityError = SecPKCS12Import((__bridge CFDataRef)p12Data, (__bridge CFDictionaryRef)options, &items); <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (securityError == noErr && CFArrayGetCount(items) > <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) { CFDictionaryRef identityDict = CFArrayGetValueAtIndex(items, <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">0</span>); SecIdentityRef identityApp = (SecIdentityRef)CFDictionaryGetValue(identityDict, kSecImportItemIdentity); securityError = SecIdentityCopyPrivateKey(identityApp, &privateKeyRef); <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (securityError != noErr) { privateKeyRef = <span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">NULL</span>; } } _privateKey = privateKeyRef;<span class="hljs-comment" style="margin: 0px; padding: 0px; color: rgb(136, 0, 0); box-sizing: border-box;">// CFRelease(items);</span>}- (<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)rsaDecryptText:(<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)text { NSData *data = [NSData hdf_base64DataFromString:text]; NSData *decryptData = [<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">self</span> rsaDecryptData:data]; <span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *result = [[<span class="hljs-built_in" style="margin: 0px; padding: 0px; color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> alloc] initWithData:decryptData encoding:NSUTF8StringEncoding]; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">return</span> result;}- (NSData *)rsaDecryptData:(NSData *)data { SecKeyRef key = _privateKey; size_t cipherLen = [data length]; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span> *cipher = malloc(cipherLen); [data getBytes:cipher length:cipherLen]; size_t plainLen = SecKeyGetBlockSize(key) - <span class="hljs-number" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">12</span>; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span> *plain = malloc(plainLen); OSStatus status = SecKeyDecrypt(key, kSecPaddingPKCS1, cipher, cipherLen, plain, &plainLen); <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (status != noErr) { <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-literal" style="margin: 0px; padding: 0px; color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>; } NSData *decryptedData = [[NSData alloc] initWithBytes:(<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">const</span> <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">void</span> *)plain length:plainLen]; <span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">return</span> decryptedData;}<span class="hljs-keyword" style="margin: 0px; padding: 0px; color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="margin: 0px; padding: 6px 0px 40px; box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">1</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">2</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">3</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">4</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">5</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">6</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">7</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">8</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">9</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">10</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">11</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">12</li><li style="margin: 0px; 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padding: 0px 5px; box-sizing: border-box;">69</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">70</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">71</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">72</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">73</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">74</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">75</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">76</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">77</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">78</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">79</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">80</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">81</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">82</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">83</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">84</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">85</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">86</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">87</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">88</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">89</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">90</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">91</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">92</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">93</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">94</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">95</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">96</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">97</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">98</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">99</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">100</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">101</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">102</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">103</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">104</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">105</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">106</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">107</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">108</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">109</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">110</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">111</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">112</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">113</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">114</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">115</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">116</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">117</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">118</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">119</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">120</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">121</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">122</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">123</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">124</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">125</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">126</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">127</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">128</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">129</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">130</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">131</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">132</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">133</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">134</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">135</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">136</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">137</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">138</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">139</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">140</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">141</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">142</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">143</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">144</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">145</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">146</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">147</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">148</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">149</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">150</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">151</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">152</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">153</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">154</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">155</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">156</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">157</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">158</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">159</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">160</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">161</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">162</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">163</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">164</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">165</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">166</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">167</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">168</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">169</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">170</li><li style="margin: 0px; padding: 0px 5px; box-sizing: border-box;">171</li></ul>写在最后
笔者经历了九九八十一难才调通，在前端实现RSA加密和解密，并验证成功。这里面关系到很多方面的知识，大家可以参考苹果官方关于安全性方面的文档。如果这里写得不好或者读完文章您还不懂怎么做，不要担心，这是很正常的。因为笔者也是经过了好几天的研究和讨论才在安全性方面有所了解。
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