#!/usr/bin/env bash

 echo "Generating RSA key pair ..."

 echo "1024 RSA key: private_key.pem"

 openssl genrsa -out private_key.pem 

 echo "create certification require file: rsaCertReq.csr"

 openssl req -new -key private_key.pem -out rsaCertReq.csr

 echo "create certification using x509: rsaCert.crt"

 openssl x509 -req -days  -in rsaCertReq.csr -signkey private_key.pem -out rsaCert.crt

 echo "create public_key.der For IOS"

 openssl x509 -outform der -in rsaCert.crt -out public_key.der

 echo "create private_key.p12 For IOS. Please remember your password. The password will be used in iOS."

 openssl pkcs12 -export -out private_key.p12 -inkey private_key.pem -in rsaCert.crt

 echo "create rsa_public_key.pem For Java"

 openssl rsa -in private_key.pem -out rsa_public_key.pem -pubout

 echo "create pkcs8_private_key.pem For Java"

 openssl pkcs8 -topk8 -in private_key.pem -out pkcs8_private_key.pem -nocrypt

 echo "finished."

 #import "ViewController.h"

 #import "RSA.h"

 @interface ViewController ()

 @end

 @implementation ViewController

 - (void)viewDidLoad {

     [super viewDidLoad];

     // Do any additional setup after loading the view, typically from a nib.

     // 获取公钥的数据

     // 公钥的iOS客户端使用，我们打到公钥以后，只需要根据公钥处理数据就可以了

     NSString *publicKey = @"-----BEGIN PUBLIC KEY-----MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCuNX8J0NZ1jvIyfzhgga/2+4/dUqqN15ijWVmWWxpfzdph1aG3UlH3SfPplgfeSuPBZUokD6WW70LSQKgbd74jcz5GoBXN40WxGTXfP5sTbcQqM5UBtbza9wWhCjw+jPQOwh17rvpOdUj0QppHoDRdeeHwXrjCntzvB7IBs0si7wIDAQAB-----END PUBLIC KEY-----";

     // 获取私钥，用于解密数据的，千万不能泄露，否则数据不安全

     NSString *privateKey = @"-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----";

     // 创建字符串

     NSString *testStr = @"小暖心";

     // 创建存储公钥的字符串

     NSString *encPublicKey;

     // 创建存储私钥的字符串

     NSString *encPrivateKey;

     // 使用RSA进行加密处理

     // 参数1：需要加密的内容

     // 参数2：公钥字符串

     encPublicKey = [RSA encryptString:testStr publicKey:publicKey];

     NSLog(@"public = %@", encPublicKey);

     // 解密处理

     // 第一个参数：由java后台提供

     // 第二个参数：私钥字符串

     NSString *result = @"p/hm1SvJm9SuuPy66rrf37+EhynkpVnCxbSCZfKznrAKVfpciX/TZM9GfLrAs+bXlND+GeOeZDz2zm+nZDtxpGV1pyQY03hOWn1MQ2+wBKKQdveEdYJ4TVXwGtC3PMaA3dwdRY+WqInQj9WX4JfuQfkYCqbmI0w86uydjFpenwE=";   // 进过加密之后需要把加密的内容传送给后台，此时后台会给你返回一个相对应的字符串

     encPrivateKey = [RSA decryptString:result privateKey:privateKey];

     NSLog(@"private = %@", encPrivateKey);

 }

gen shell 写道

openssl pkcs8 -topk8 -in private_key.pem -out pkcs8_private_key.pem -nocrypt