linux下如何生成公钥和私钥 有大用

apache提供工具open-ssh可以生产秘钥 

私钥生成方式

openssl genrsa -out rsa_private.pem 1024

find / -name rsa_private.pem

直接登录服务器生成

生成公钥文件 需要在私钥的基础上生成

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

AES.php

采用公钥加密，私钥解密

每次密文都在变化但是，解密的内容不变化

非对称加密比对称加密要慢一些

<?php
/**
 * Created by PhpStorm.
 * User: lj
 * Date: 2018/10/21
 * Time: 9:36 PM
 */
//PULIC KEY
$public_key='-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC42exbLrawxAOUoHb4DHr1dsfO
IIV3G5ozgjw/fhaiWE2tTO1kHu3irkY5/tVH/u4qT1r8yhyAmFFFmJ5aYqogFSrJ
h8oUjy/D+GK88cfEUPGyuSyzH9Smn7mzN9jDsEigC59VSpH4oJkSSNYuP4M5/cq4
BEsrskCQXDT3COU0gwIDAQAB
-----END PUBLIC KEY-----';
//private_key
$private_key='-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';
$data='我在操作加密啦啦啦啦';
//使用公钥加密
openssl_public_encrypt($data, $encrypt_str, $public_key);
$encrypt_str=base64_encode($encrypt_str);
echo '加密后的密文采用64位编码后是:'.$encrypt_str;
echo'<br>';
//使用私钥解密
openssl_private_decrypt(base64_decode($encrypt_str),$decrpt_str,$private_key);
echo '解密后的数据是:'.$decrpt_str;
echo'<br>';

代码可以使用私钥加密。公钥解密

下面是使用私钥加密，公钥解密，发现密文不会变化，至于为什么公钥加密私钥解密密文会变化，而私钥加密公钥解密不变化跟RSA算法有关，需要去看相关专业的资料

//PULIC KEY
$public_key='-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC42exbLrawxAOUoHb4DHr1dsfO
IIV3G5ozgjw/fhaiWE2tTO1kHu3irkY5/tVH/u4qT1r8yhyAmFFFmJ5aYqogFSrJ
h8oUjy/D+GK88cfEUPGyuSyzH9Smn7mzN9jDsEigC59VSpH4oJkSSNYuP4M5/cq4
BEsrskCQXDT3COU0gwIDAQAB
-----END PUBLIC KEY-----';
//private_key
$private_key='-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';
$data='我在操作加密啦啦啦啦';
//使用私钥加密
openssl_private_encrypt($data, $encrypt_str, $private_key);
$encrypt_str=base64_encode($encrypt_str);
echo '私钥加密后的密文采用64位编码后是:'.$encrypt_str;
echo'<br>';
//使用公钥解密
openssl_public_decrypt(base64_decode($encrypt_str),$decrpt_str,$public_key);
echo '公钥解密后的数据是:'.$decrpt_str;
echo'<br>';

如果觉得写私钥 公钥在代码里太多了 也可以直接使用file_get_content把文件读取过来

最后把代码封装成一个类

$str='家世界阿加莎';
$rsa=new RSA();
$encrypt_str=$rsa->encrypt($str);
echo '加密后的数据是:'.$encrypt_str;
$decrpt_str=$rsa->decrypt($encrypt_str);
echo '<br>';
echo '解密后的数据是:'.$decrpt_str;
class RSA{
public function __construct()
{
//PULIC KEY
$this->public_key='-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC42exbLrawxAOUoHb4DHr1dsfO
IIV3G5ozgjw/fhaiWE2tTO1kHu3irkY5/tVH/u4qT1r8yhyAmFFFmJ5aYqogFSrJ
h8oUjy/D+GK88cfEUPGyuSyzH9Smn7mzN9jDsEigC59VSpH4oJkSSNYuP4M5/cq4
BEsrskCQXDT3COU0gwIDAQAB
-----END PUBLIC KEY-----';
//private_key
$this->private_key='-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';
}
public function encrypt($data){
openssl_public_encrypt($data, $encrypt_str, $this->public_key);
return base64_encode($encrypt_str);
}
public function decrypt($data){
$data=openssl_private_decrypt(base64_decode($data),$decrpt_str,$this->private_key);
return $decrpt_str;
}
}

https就是使用的rsa加密方式