Category Archives: Programming Language

设置PHP脚本执行超时时间的方法

设置PHP脚本执行超时的时间有下面这样一些方法： php.ini 中限定程序的最长执行时间是 30 秒，这是由 php.ini 配置文件中的 max_execution_time 变量指定，倘若你有一个需要颇多时间才能完成的程序代码，代码会由于超时而执行失败，例如要发送很多电子邮件给大量收件者，或者要进行繁重的数据分析工作，服务器会在 30 秒后强行中止正在执行的程序，如何解决这个问题呢。一、在php.ini里面设置 max_execution_time = 1800; 二、通过PHP的ini_set 函数设置 ini_set("max_execution_time", "1800"); 三、通过set_time_limit 函数设置 set_time_limit(1800) ; ——————— 作者：YOYOYOHUI 来源：CSDN 原文：https://blog.csdn.net/yoyoyohui/article/details/83009250 版权声明：本文为博主原创文章，转载请附上博文链接！

龙生 21 May 2019

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yarn的安装和使用

yarn的简介： Yarn是facebook发布的一款取代npm的包管理工具。 yarn的特点：速度超快。 Yarn 缓存了每个下载过的包，所以再次使用时无需重复下载。同时利用并行下载以最大化资源利用率，因此安装速度更快。超级安全。在执行代码之前，Yarn 会通过算法校验每个安装包的完整性。超级可靠。使用详细、简洁的锁文件格式和明确的安装算法，Yarn 能够保证在不同系统上无差异的工作。 yarn的安装: 下载node.js，使用npm安装 npm install -g yarn 查看版本：yarn --version 安装node.js,下载yarn的安装程序: 提供一个.msi文件，在运行时将引导您在Windows上安装Yarn Yarn 淘宝源安装，分别复制粘贴以下代码行到黑窗口运行即可 yarn config set registry https://registry.npm.taobao.org -g yarn config set sass_binary_site http://cdn.npm.taobao.org/dist/node-sass -g yarn的常用命令：安装yarn npm install -g yarn 安装成功后，查看版本号： yarn --version 创建文件夹 yarn md yarn 进入yarn文件夹 cd yarn 初始化项目 yarn init // 同npm init，执行输入信息后，会生成package.json文件 yarn的配置项： yarn config list // 显示所有配置项 yarn config get <key> //显示某配置项 yarn config delete <key> //删除某配置项 yarn config set <key> <value> [-g|--global] //设置配置项安装包： yarn install //安装package.json里所有包，并将包及它的所有依赖项保存进yarn.lock yarn install […]

龙生 21 May 2019

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该博客部署到线上时，报错It is unsafe to run Dusk in production

今天把博客布置上线，运行完composer install之后，报错It is unsafe to run Dusk in production.。这是因为安装了dusk包，当你的APP_ENV=local、testing时是本地测试环境，他就是用来检测代码的质量如何，所以不会抛出这个异常。但是当你的APP_ENV=production时，也就是你部署到线上了，这个包会暴露很多接口以及程序信息，会给你的程序带来致命的危险。解决办法也很简单，要么在线上的时候把这个包给删除掉。要么就是在安装这个包的时候，将他放在composer.json文件的require-dev下面，在线上composer安装完毕，再运行一下

1	composer install --no-dev

问题解决。 from:https://www.guangsky.com/article/1

龙生 21 May 2019

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还原laravel项目

通过 git clone 下来的 laravel 项目，因为 .gitignore 文件设置了忽略项的原因，没有/vendor目录和 /node_modules，所以直接跑是肯定跑不起来的。这时候，就需要还原 laravel 项目。首先进入 clone 下来的项目文件 1、还原 vendor 目录

1	composer install

2、还原 node_modules 目录

1	npm install

或者（使用了淘宝源的话）

1	cnpm install

3、还原 .env

1 2	cp .env.example .env php artisan key:generate

接着按照自身情况配置 .env 4、还原 homestead.yaml

1	php vendor/bin/homestead make

5、启动 homestead

1	vagrant up

6、还原数据库

vagrant ssh

cd XXXX

php artisan migrate

php artisan db:seed

这样就恢复了 laravel 项目。作者：Arnold_Z 链接：https://www.jianshu.com/p/dd16a9d499b9 来源：简书简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。

龙生 21 May 2019

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Intellij Idea下tomcat设置自动编译

*eclipse默认tomcat下是自动完成编译；而Intellij Idea默认tomcat下不是自动完成编译，从如下开始设置：进入“settings”，如下图找到“compiler”，选中如图框选选项勾选“Build project automatically”，保存即可。 from:https://www.cnblogs.com/zdb292034/p/8047267.html

龙生 19 May 2019

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IntelliJ IDEA怎么设置自动编译

第一步在我们的电脑上打开IntelliJ IDEA，点击File->Settings，如下图所示：第二步进去Settings之后，点击 Compiler，如下图所示：第三步勾选“Build project automatically”，点击OK，如下图所示：第四步按“ctrl+alt+shift+/”键，选择Registry ，如下图所示：第五步勾选“compiler.automake.allow.when.app.running”，保存之后，进行重启IntelliJ IDEA就完成了，如下图所示： from:https://jingyan.baidu.com/article/ca2d939d5b0c05eb6d31ce77.html

龙生 19 May 2019

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C# RSA 无长度限制加密解密示例

RSA 是一种非对称加密算法。由于算法特性，加密和解密过程用不同密钥，即公钥和私钥，而被广泛应用于数字证书的安全管理。在具体应用中，公钥用加密而私钥用于解密，或私钥用于数字签名而公钥用于签名验证。由于非对称加密算法比价复杂，耗时较长，所以一般在网络环境中RAS 被应用于签名认证，或小数据传输，如 AES 对称密钥传输。在.Net 框架中，默认提供的辅助类只能对密钥长度大小相同的数据进行加密解密。此文提供C# RSA 算法示例一座优化，可以不限数据大小。此实例仅供交流学习。 RSA 加密

public string RsaEncrypt(string rawInput, string publicKey)

{

if (string.IsNullOrEmpty(rawInput))

{

return string.Empty;

}

if(string.IsNullOrWhiteSpace(publicKey))

{

throw new ArgumentException("Invalid Public Key");

}

using (var rsaProvider = new RSACryptoServiceProvider())

{

var inputBytes = Encoding.UTF8.GetBytes(rawInput);//有含义的字符串转化为字节流

rsaProvider.FromXmlString(publicKey);//载入公钥

int bufferSize = (rsaProvider.KeySize / 8) - 11;//单块最大长度

var buffer = new byte[bufferSize];

using (MemoryStream inputStream = new MemoryStream(inputBytes),

outputStream = new MemoryStream())

{

while (true)

{ //分段加密

int readSize = inputStream.Read(buffer, 0, bufferSize);

if (readSize <= 0)

{

break;

}

var temp = new byte[readSize];

Array.Copy(buffer, 0, temp, 0, readSize);

var encryptedBytes = rsaProvider.Encrypt(temp, false);

outputStream.Write(encryptedBytes, 0, encryptedBytes.Length);

}

return Convert.ToBase64String(outputStream.ToArray());//转化为字节流方便传输

}

RSA 解密

public string RsaDecrypt(string encryptedInput, string privateKey)

{

if (string.IsNullOrEmpty(encryptedInput))

{

return string.Empty;

}

if (string.IsNullOrWhiteSpace(privateKey))

{

throw new ArgumentException("Invalid Private Key");

}

using (var rsaProvider = new RSACryptoServiceProvider())

{

var inputBytes = Convert.FromBase64String(encryptedInput);

rsaProvider.FromXmlString(privateKey);

int bufferSize = rsaProvider.KeySize / 8;

var buffer = new byte[bufferSize];

using (MemoryStream inputStream = new MemoryStream(inputBytes),

outputStream = new MemoryStream())

{

while (true)

{

int readSize = inputStream.Read(buffer, 0, bufferSize);

if (readSize <= 0)

{

break;

}

var temp = new byte[readSize];

Array.Copy(buffer, 0, temp, 0, readSize);

var rawBytes = rsaProvider.Decrypt(temp, false);

outputStream.Write(rawBytes, 0, rawBytes.Length);

}

return Encoding.UTF8.GetString(outputStream.ToArray());

}

from:https://blog.csdn.net/hangzhi22/article/details/53089154

龙生 16 May 2019

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RSA密钥之C#格式与Java格式转换

前言最近由于项目需求，服务端由c#编写，客户端由java编写。通信数据使用RSA非对称加密。但是java和c#生成的密钥格式是不一样的，所以需要转换格式才可以正常使用。网上搜到使用java进行格式转换的代码（如：http://blog.csdn.net/road2010/article/details/40071881 ），本文将给出一种c#的实现方法。密钥格式 java密钥格式如下：私钥： 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 公钥： MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkmUkhHT4b++zuaHJyzRl3kNtaiQwKwtfsiHfvf6WOW15GZObwgePRKXzMDbpC7+gCaqH04WTzTrNbdNeX3RGCFJ5CHNkFcUcGtMU3hT+jfA+FkF0VrOHzRtuySuZD+ObPvSpSbceYbOxve2jHM3oSFqR2juo/Ypzpo5VPJetimQIDAQAB .NET密钥格式如下：私钥：

<Modulus>pJlJIR0+G/vs7mhycs0Zd5DbWokMCsLX7Ih373+ljlteRmTm8IHj0Sl8zA26Qu/oAmqh9OFk806zW3TXl90RghSeQhzZBXFHBrTFN4U/o3wPhZBdFazh80bbskrmQ/jmz70qUm3HmGzsb3toxzN6Ehakdo7qP2Kc6aOVTyXrYpk=</Modulus>

<P>1WKkFg6jlS2eZSVLiH1CK4b9uhr7qE1/L+tPqKQs+PzHX4eiZXnyAlQ+kgGmL7n1wR1RWNuiYnDZUetmTogaDQ==</P>

<Q>xXhsuEnNJNQcQHEVTPZoulbMbTV1VZIDQ1zjG8fvu8sv6IBYcR5+EsC8n3/6RkW8/iCJDzxE++VHzhoSQSoDvQ==</Q>

<DP>zr/rcn+umd0Aisnu/Ik48smxz39TdIfaAwkBPsoL1Re+6V2WyLG1/fG4SmmUpsuMRRdt+SWdmbnzpr7peo++hQ==</DP>

<DQ>MWi2W04sBEEGaKFi4QTuo2FAeTrdBvIn2t0M/lCCjYyDijtC5drpVKvhBk+xQZAFf9iIMsWzxQtTciBX3PI0SQ==</DQ>

<InverseQ>wGEfA3LWM4NHgRnXDqwwOUs3OtqWK0tsJPPcFMci+Bcgy96JpFTCr7bubXHMu14bdopCWUann2d3UuwEpvP+</InverseQ>

<D>mK3TRtMwRJb33OGnn9OeFumYfy92qxi3X6Hq1o6qDBW2qkd4bImfv+ni6AinyOVuaadt2Y+lq4dKGcCVJzoZvPm1VKxD2y7xKa8/vEbPRiRTt0qnPq9T7UJkpDsiXf/zOMfWdjc3uA1bPnQ65RWHSJ7zAE+Gd7xnyCE5MEyijLE=</D>

</RSAKeyValue>

公钥：

<Modulus>pJlJIR0+G/vs7mhycs0Zd5DbWokMCsLX7Ih373+ljlteRmTm8IHj0Sl8zA26Qu/oAmqh9OFk806zW3TXl90RghSeQhzZBXFHBrTFN4U/o3wPhZBdFazh80bbskrmQ/jmz70qUm3HmGzsb3toxzN6Ehakdo7qP2Kc6aOVTyXrYpk=</Modulus>

</RSAKeyValue>

转换实现代码（c#）格式转换要用到一个开源加密库Bouncy Castle Crypto APIs，官网地址： http://www.bouncycastle.org/csharp/ 具体实现代码如下：

using System;

using System.Xml;

using Org.BouncyCastle.Asn1.Pkcs;

using Org.BouncyCastle.Asn1.X509;

using Org.BouncyCastle.Crypto.Parameters;

using Org.BouncyCastle.Math;

using Org.BouncyCastle.Pkcs;

using Org.BouncyCastle.Security;

using Org.BouncyCastle.X509;

/// <summary>

/// RSA密钥格式转换

/// </summary>

public class RSAKeyConvert

{

/// <summary>

/// RSA私钥格式转换，java->.net

/// </summary>

/// <param name="privateKey">java生成的RSA私钥</param>

/// <returns></returns>

public static string RSAPrivateKeyJava2DotNet(string privateKey)

{

RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));

return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent><P>{2}</P><Q>{3}</Q><DP>{4}</DP><DQ>{5}</DQ><InverseQ>{6}</InverseQ><D>{7}</D></RSAKeyValue>",

Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),

Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned()));

}

/// <summary>

/// RSA私钥格式转换，.net->java

/// </summary>

/// <param name="privateKey">.net生成的私钥</param>

/// <returns></returns>

public static string RSAPrivateKeyDotNet2Java(string privateKey)

{

XmlDocument doc = new XmlDocument();

doc.LoadXml(privateKey);

BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));

BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));

BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText));

BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText));

BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText));

BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText));

BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText));

BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText));

RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv);

PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam);

byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded();

return Convert.ToBase64String(serializedPrivateBytes);

}

/// <summary>

/// RSA公钥格式转换，java->.net

/// </summary>

/// <param name="publicKey">java生成的公钥</param>

/// <returns></returns>

public static string RSAPublicKeyJava2DotNet(string publicKey)

{

RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));

return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent></RSAKeyValue>",

Convert.ToBase64String(publicKeyParam.Modulus.ToByteArrayUnsigned()),

Convert.ToBase64String(publicKeyParam.Exponent.ToByteArrayUnsigned()));

}

/// <summary>

/// RSA公钥格式转换，.net->java

/// </summary>

/// <param name="publicKey">.net生成的公钥</param>

/// <returns></returns>

public static string RSAPublicKeyDotNet2Java(string publicKey)

{

XmlDocument doc = new XmlDocument();

doc.LoadXml(publicKey);

BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));

BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));

RsaKeyParameters pub = new RsaKeyParameters(false, m, p);

SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub);

byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded();

return Convert.ToBase64String(serializedPublicBytes);

}

from:https://www.cnblogs.com/datous/p/RSAKeyConvert.html

龙生 16 May 2019

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Rsa加解密Java、C#、php通用代码密钥转换工具

之前发了一篇"TripleDes的加解密Java、C#、php通用代码"，后面又有项目用到了Rsa加解密，还是在不同系统之间进行交互，Rsa在不同语言的密钥格式不一样，所以过程中主要还是密钥转换问题，为方便密钥转换，写了一个XML和PEM格式的密钥转换工具，文章后面会提供密钥转换工具的下载地址，通过搜索参考和研究终于搞定了在Java、C#和Php都可以通用的加解密代码，整理了Rsa的加解密代码做个记录，以后可以参考，大家应该都知道Rsa算法，这里就不说明了，直接看代码（代码主要是公钥加密私钥解密，密文统一进行base64编码，密钥长度为2048）： Java版本：

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package com.w3cnet.leetcode.utils;

import java.io.BufferedReader;

import java.io.ByteArrayOutputStream;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.security.*;

import java.security.interfaces.RSAPrivateKey;

import java.security.interfaces.RSAPublicKey;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.X509EncodedKeySpec;

import java.util.HashMap;

import java.util.Map;

import javax.crypto.Cipher;

import org.apache.commons.codec.binary.Base64;

public class RsaUtil {

/**

* 加密算法

public static final String ALGORITHM = "RSA";

/**

* 填充方式

public static final String PADDING_FORMAT = "RSA/ECB/PKCS1Padding";

/**

* 明文块最大值

private static final int MAX_ENCRYPT_BLOCK = 245;

/**

* 密文块最大值

private static final int MAX_DECRYPT_BLOCK = 256;

/**

* 加密

* @param text 明文

* @param publicKey 公钥

* @param charset 字符编码

* @return 加密后的字符串（base64）

* @throws Exception

public static String encrypt(String text, String publicKey, String charset)

throws Exception {

byte[] data = text.getBytes(charset);

byte[] keyBytes = Base64.decodeBase64(publicKey);

X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM);

Key publicK = keyFactory.generatePublic(x509KeySpec);

// 对数据加密

Cipher cipher = Cipher.getInstance(PADDING_FORMAT);

cipher.init(Cipher.ENCRYPT_MODE, publicK);

int length = data.length;

ByteArrayOutputStream out = new ByteArrayOutputStream();

int offSet = 0;

byte[] cache;

int i = 0;

// 对数据分段加密

while (length - offSet > 0) {

int len = length - offSet > MAX_ENCRYPT_BLOCK ? MAX_ENCRYPT_BLOCK : length - offSet;

cache = cipher.doFinal(data, offSet, len);

out.write(cache, 0, cache.length);

i++;

offSet = i * MAX_ENCRYPT_BLOCK;

}

byte[] cipherBytes = out.toByteArray();

out.close();

return Base64.encodeBase64String(cipherBytes);

}

/**

* 私钥解密

* @param ciphertext 密文（base64）

* @param privateKey 私钥

* @param charset 字符编码

* @return

* @throws Exception

public static String decrypt(String ciphertext, String privateKey, String charset)

throws Exception {

byte[] data = Base64.decodeBase64(ciphertext);

byte[] keyBytes = Base64.decodeBase64(privateKey);

PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM);

Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);

Cipher cipher = Cipher.getInstance(PADDING_FORMAT);

cipher.init(Cipher.DECRYPT_MODE, privateK);

int length = data.length;

ByteArrayOutputStream out = new ByteArrayOutputStream();

int offSet = 0;

byte[] cache;

int i = 0;

while (length - offSet > 0) {

int len = length - offSet > MAX_DECRYPT_BLOCK ? MAX_DECRYPT_BLOCK : length - offSet;

cache = cipher.doFinal(data, offSet, len);

out.write(cache, 0, cache.length);

i++;

offSet = i * MAX_DECRYPT_BLOCK;

}

byte[] textBytes = out.toByteArray();

out.close();

return new String(textBytes, charset);

}

/**

* 从文件中加载密钥字符串

* @return 是否成功

* @throws Exception

public static String loadKeyString(String keyFile){

String keyString="";

InputStream in=null;

BufferedReader br=null;

try {

in=RSACryptoUtil.class.getResourceAsStream("/"+keyFile);

br= new BufferedReader(new InputStreamReader(in));

String readLine= null;

StringBuilder sb= new StringBuilder();

while((readLine= br.readLine())!=null){

if(readLine.charAt(0)=='-'){

continue;

}else{

sb.append(readLine);

sb.append('\r');

}

keyString=sb.toString();

} catch (IOException e) {

} catch (Exception e) {

}finally{

if(br!=null){

try {

br.close();

} catch (IOException e) {

}

if(in!=null){

try {

in.close();

} catch (IOException e) {

}

return keyString;

}

/**

* 从文件中加载密钥字符串根据文件路径加载

* @return 是否成功

* @throws Exception

public static String loadKeyStringByPath(String keyFile){

String keyString="";

InputStream in=null;

BufferedReader br=null;

try {

in = new FileInputStream(keyFile);

br= new BufferedReader(new InputStreamReader(in));

String readLine= null;

StringBuilder sb= new StringBuilder();

while((readLine= br.readLine())!=null){

if(readLine.charAt(0)=='-'){

continue;

}else{

sb.append(readLine);

sb.append('\r');

}

keyString=sb.toString();

} catch (IOException e) {

System.out.println(e.getMessage());

} catch (Exception e) {

System.out.println(e.getMessage());

}finally{

if(br!=null){

try {

br.close();

} catch (IOException e) {

}

if(in!=null){

try {

in.close();

} catch (IOException e) {

}

return keyString;

}

public static void main(String[] args) throws Exception {

String publicKey = RSAUtils.loadKeyStringByPath("D:/sso_public_key_test.pem");

System.out.println(RSACryptoUtil.encrypt("123", publicKey, "utf-8"));

}

C#版本：

public class RsaUtil

{

/// <summary>

/// 加密

/// </summary>

/// <param name="text">明文</param>

/// <param name="publicKey">公钥</param>

/// <returns>密文</returns>

public static string Encrypt(string text, string publicKey)

{

var bytes = Encoding.UTF8.GetBytes(text);

var length = bytes.Length;

// rsa实例

var rsa = new RSACryptoServiceProvider();

rsa.FromXmlString(publicKey);

var blockSize = (rsa.KeySize / 8) - 11;

var offSet = 0; // 游标

var i = 0;

byte[] cache;

var ms = new MemoryStream();

while (length - offSet > 0)

{

var len = length - offSet > blockSize ? blockSize : length - offSet;

var temp = new byte[len];

Array.Copy(bytes, offSet, temp, 0, len);

cache = rsa.Encrypt(temp, false);

ms.Write(cache, 0, cache.Length);

i++;

offSet = i * blockSize;

}

var cipherBytes = ms.ToArray();

return Convert.ToBase64String(cipherBytes);

}

/// <summary>

/// RSA解密

/// </summary>

/// <param name="ciphertext">密文</param>

/// <param name="privateKey">私钥</param>

/// <returns>明文</returns>

public static string Decrypt(string ciphertext, string privateKey)

{

var blockSize = 256;

var bytes = Convert.FromBase64String(ciphertext);

var length = bytes.Length;

// rsa实例

var rsa = new RSACryptoServiceProvider();

rsa.FromXmlString(privateKey);

var offSet = 0; // 游标

var i = 0;

byte[] cache;

var ms = new MemoryStream();

while (length - offSet > 0)

{

var len = length - offSet > blockSize ? blockSize : length - offSet;

var temp = new byte[len];

Array.Copy(bytes, offSet, temp, 0, len);

cache = rsa.Decrypt(temp, false);

ms.Write(cache, 0, cache.Length);

i++;

offSet = i * blockSize;

}

var cipherBytes = ms.ToArray();

return Encoding.UTF8.GetString(cipherBytes);

}

PHP版本：

<?php

#私钥

$private_key = '-----BEGIN PRIVATE KEY-----

MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQCocmvQIWD2L9TW

N1uKpLONwHcdy2oaKoW1CtI8PB+S+UjdEuLl3usWEuh3ZgLYloPyD9553SJFn7an

fOplHITBqASOIXt9pi0CkahUPgwCPj4Dke5cT3fsp2i243/FX3afzrcf7FfTrEv/

LT22wF3csqrGt/UhqMcmpWIpPaL8edoCwGRBhghzEWaRwPZ2x5RPg+9qTSy0M7QG

u+8EwYDnNkGGuuIwzNxklclic9Unp96eVp33vOP/LNvz90OcuqGQQcABh+e2ttv6

VzqlRcD1GRhxqkT3erXmgbQAVm6JQHArK1Up10No+lth1tri5TGcL0BEF7PetDIj

jYh+aCLpAgMBAAECggEAPjFI1yaLyzmrxo/Xz5+x36NxF2IUQabziP1+09iK+9Po

cB9aAO9GMvc2N2dFo7wm6Uesp6fa0IQAh2RakoxuA6ZKUEPSeXjSY4Ft+fSSsH1U

njLSI+j/aTQCOIxUj4YIoUZMXJABeVjDEmscvw3VWffpj8c5zXyoUv9696kXNUoa

uHOuphe1UNc3ghFIpWK+7ScxkPB6KtmAFwD4LSbT9OwhPozavBqouQvhLt1bXO8C

ycKq4f1Pzhtt3sq3BRsPwqGhWt1NK95upKQuDnk1kJHjNzScH1FZxhsBHLxwOJ6E

M7HP5Ywh78umusaNPVLMM6+YVWbENg+WZZcXd/XspQKBgQDRIhIukY7m7fRBH0CP

mHi20gUmn7HzXgLxlbcU5n2PMDHHOg8D+Nmz1MnYPRQNwqxJdH8HOk8YQDC2uA+h

BpyCpvPbp6y6SnZw8bhqiNfSHBjEftmg7lUU5xzBiBo6SyCyLkWD2xa/O8Vyh6ut

/G1mQpNNJWWt5b+g5c4i0/fIhwKBgQDOMjGcLS8zHnZ30ZsWUS39iZ5TZXPCldTl

Q9JB5PnB4CajYmQEdw3n9C6mOO42b+3M04mmqo1r0HiNyA9lZQQNsM3KqG+ngGvE

0DM1cAyuz3Fi3XTIhAbRyXXyVbqBp5Yh2/O2lvrsInusJrimDRgwglquu2GsdVrj

+++b2DFFDwKBgQCkfXLlk/FdK44xZn5mM1vHGBubDIJv0+Lm14Yf90aMyDBu7fh/

fEznSBfWb/wE8riGMg3zxmYNwfdO0Cji04torB4kB5cxE35jSYxupuFxzk2gx9Eu

5iafgUQ56G4QqaS24PQmSL10fnPHqHRdLa1ygCzRwfdettVpnTbsZ+J9owKBgQDF

o2Tb3o9sPxmsdVNiy8L6TstcAlU3wOfELQK+uFwQ0eoXFvrpMLg6iVmhZ9YkhZp4

hpZdEwLkwXib5ZOkS3PcL4jBZDtJYRVrG2jKIrF1aU60RbJnc+0ZbjHIaxWOqvSD

VdE/RW4TomXKN38rYke6T2feLatMY1wQRG6BgXKQTwKBgQDKfK9Xuqzx+WI4AohT

EwKrQEZUMD+6DTESHHG9As4zMJ9zU+6iPpM4Gw4CzfJZHhPP4dD+TC9NcvvR+GC9

UkwxmZrvP1+6KNFp0DZNk6M9wPZuYM/E63Vy0sFEA+/gFp4vQh8k7N8n/n7DhR3v

kLuPdicfsKcz0thxzyDjv6oR2g==

-----END PRIVATE KEY-----';

#公钥

$public_key = '-----BEGIN PUBLIC KEY-----

MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqHJr0CFg9i/U1jdbiqSz

jcB3HctqGiqFtQrSPDwfkvlI3RLi5d7rFhLod2YC2JaD8g/eed0iRZ+2p3zqZRyE

wagEjiF7faYtApGoVD4MAj4+A5HuXE937KdotuN/xV92n863H+xX06xL/y09tsBd

3LKqxrf1IajHJqViKT2i/HnaAsBkQYYIcxFmkcD2dseUT4Pvak0stDO0BrvvBMGA

5zZBhrriMMzcZJXJYnPVJ6fenlad97zj/yzb8/dDnLqhkEHAAYfntrbb+lc6pUXA

9RkYcapE93q15oG0AFZuiUBwKytVKddDaPpbYdba4uUxnC9ARBez3rQyI42Ifmgi

6QIDAQAB

-----END PUBLIC KEY-----';

$pi_key = openssl_pkey_get_private($private_key);

$pu_key = openssl_pkey_get_public($public_key);

#公钥加密数据 rsa+base64

$data = "hello world!";

openssl_public_encrypt($data,$encrypted,$pu_key);

$base64_encrypted = base64_encode($encrypted);

echo $base64_encrypted."\n";

#私钥解密数据

openssl_private_decrypt(base64_decode($base64_encrypted),$decrypted_data,$pi_key);

echo $decrypted_data;

Rsa加解密C#和Java、php使用的密钥格式不一样，这里提供一个密钥转换工具：Rsa密钥转换工具v2.0 参考 https://www.cnblogs.com/jaamy/p/6118814.html

龙生 16 May 2019

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接口与抽象类的区别

一个类可以实现多个接口，但却只能继承最多一个抽象类。抽象类可以包含具体的方法；接口的所有方法都是抽象的。抽象类可以声明和使用字段；接口则不能，但可以创建静态的final常量。抽象类中的方法可以是public、protected、private或者默认的pagckage；接口的方法都是public。抽象类可以定义构造函数；接口不能。

龙生 10 May 2019

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