本文列举了    数据加密算法(Data Encryption Algorithm,DEA) 密码学中的高级加密标准(Advanced EncryptionStandard,AES)RSA公钥加密算法 的加密解密 .NET实现以及 安全哈希算法(Secure Hash Algorithm)和MD5的实现。

实现如下

using System;

usingSystem.Security.Cryptography;

usingSystem.IO;

usingSystem.Text;

usingSystem.Globalization;

usingSystem.Xml.Linq;

usingSystem.Collections.Generic;

namespaceEncriptSample

{

    /// <summary>

    /// 加密、解密

    /// </summary>

    class Encrypter

    {

        //DES默认密钥向量

        private static byte[] DES_IV = { 0x12,0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        //AES默认密钥向量   

        public static readonly byte[] AES_IV ={ 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, 0x12, 0x34, 0x56, 0x78, 0x90,0xAB, 0xCD, 0xEF };

        #region MD5

        /// <summary>

        /// MD5加密为32字符长度的16进制字符串

        /// </summary>

        /// <paramname="input"></param>

        /// <returns></returns>

        public static stringEncryptByMD5(string input)

        {

            MD5 md5Hasher = MD5.Create();

            byte[] data =md5Hasher.ComputeHash(Encoding.UTF8.GetBytes(input));

            StringBuilder sBuilder = newStringBuilder();

            //将每个字节转为16进制

            for (int i = ; i < data.Length;i++)

            {

               sBuilder.Append(data[i].ToString("x2"));

            }

            return sBuilder.ToString();

        }

        #endregion

        #region SHA1

        /// <summary>

        /// SHA1加密

        /// </summary>

        /// <paramname="input"></param>

        /// <returns></returns>

        public static stringEncryptBySHA1(string input)

        {

            SHA1 sha = new SHA1CryptoServiceProvider();

            byte[] bytes =Encoding.Unicode.GetBytes(input);

            byte[] result =sha.ComputeHash(bytes);

            returnBitConverter.ToString(result);

        }

        #endregion

        #region DES

        /// <summary>

        /// 加密方法

        /// </summary>

        /// <paramname="input"></param>

        /// <paramname="key"></param>

        /// <returns></returns>

        public static stringEncryptByDES(string input, string key)

        {

            byte[] inputBytes =Encoding.UTF8.GetBytes(input); //Encoding.UTF8.GetBytes(input);

            byte[] keyBytes =ASCIIEncoding.UTF8.GetBytes(key);

            byte[] encryptBytes =EncryptByDES(inputBytes, keyBytes, keyBytes);

            //string result =Encoding.UTF8.GetString(encryptBytes); //无法解码,其加密结果中文出现乱码:d\"?e????(??uπ?W??-??,_?\nJn7 

            //原因:如果明文为中文,UTF8编码两个字节标识一个中文字符,但是加密后,两个字节密文,不一定还是中文字符。

            using (DES des = newDESCryptoServiceProvider())

            {

                using (MemoryStream ms = newMemoryStream())

                {

                    using (CryptoStream cs =new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))

                    {

                        using (StreamWriterwriter = new StreamWriter(cs))

                        {

                           writer.Write(inputBytes);

                        }

                    }

                }

            }

            string result =Convert.ToBase64String(encryptBytes);

            return result;

        }

        /// <summary>

        /// DES加密

        /// </summary>

        /// <paramname="inputBytes">输入byte数组</param>

        /// <param name="key">密钥,只能是英文字母或数字</param>

        /// <param name="IV">偏移向量</param>

        /// <returns></returns>

        public static byte[]EncryptByDES(byte[] inputBytes, byte[] key, byte[] IV)

        {

            DES des = newDESCryptoServiceProvider();

            //建立加密对象的密钥和偏移量

            des.Key = key;

            des.IV = IV;

            string result = string.Empty;

            //1、如果通过CryptoStreamMode.Write方式进行加密,然后CryptoStreamMode.Read方式进行解密,解密成功。

            using (MemoryStream ms = newMemoryStream())

            {

                using (CryptoStream cs = newCryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))

                {

                    cs.Write(inputBytes, ,inputBytes.Length);

                }

                return ms.ToArray();

            }

            //2、如果通过CryptoStreamMode.Write方式进行加密,然后再用CryptoStreamMode.Write方式进行解密,可以得到正确结果

            //3、如果通过CryptoStreamMode.Read方式进行加密,然后再用CryptoStreamMode.Read方式进行解密,无法解密,Error:要解密的数据的长度无效。

            //4、如果通过CryptoStreamMode.Read方式进行加密,然后再用CryptoStreamMode.Write方式进行解密,无法解密,Error:要解密的数据的长度无效。

            //using (MemoryStream ms = newMemoryStream(inputBytes))

            //{

            //    using (CryptoStream cs = newCryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Read))

            //    {

            //        using (StreamReader reader = newStreamReader(cs))

            //        {

            //            result = reader.ReadToEnd();

            //            returnEncoding.UTF8.GetBytes(result);

            //        }

            //    }

            //}

        }

        /// <summary>

        /// 解密

        /// </summary>

        /// <paramname="input"></param>

        /// <paramname="key"></param>

        /// <returns></returns>

        public static stringDecryptByDES(string input, string key)

        {

            //UTF8无法解密,Error:要解密的数据的长度无效。

            //byte[] inputBytes =Encoding.UTF8.GetBytes(input);//UTF8乱码,见加密算法

            byte[] inputBytes =Convert.FromBase64String(input);

            byte[] keyBytes =ASCIIEncoding.UTF8.GetBytes(key);

            byte[] resultBytes = DecryptByDES(inputBytes,keyBytes, keyBytes);

            string result =Encoding.UTF8.GetString(resultBytes);

            return result;

        }

        /// <summary>

        /// 解密方法

        /// </summary>

        /// <param name="inputBytes"></param>

        /// <paramname="key"></param>

        /// <paramname="iv"></param>

        /// <returns></returns>

        public static byte[]DecryptByDES(byte[] inputBytes, byte[] key, byte[] iv)

        {

            DESCryptoServiceProvider des = newDESCryptoServiceProvider();

            //建立加密对象的密钥和偏移量,此值重要,不能修改

            des.Key = key;

            des.IV = iv;

            //通过write方式解密

            //using (MemoryStream ms = newMemoryStream())

            //{

           //    using (CryptoStream cs = newCryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))

            //    {

            //        cs.Write(inputBytes, 0,inputBytes.Length);

            //    }

            //    return ms.ToArray();

            //}

            //通过read方式解密

            using (MemoryStream ms = newMemoryStream(inputBytes))

            {

                using (CryptoStream cs = newCryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Read))

                {

                    using (StreamReader reader = newStreamReader(cs))

                    {

                        string result =reader.ReadToEnd();

                        returnEncoding.UTF8.GetBytes(result);

                    }

                }

            }

            //错误写法,注意哪个是输出流的位置,如果范围ms,与原文不一致。

            //using (MemoryStream ms = newMemoryStream(inputBytes))

            //{

            //    using (CryptoStream cs = newCryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Read))

            //    {

            //        cs.Read(inputBytes, 0,inputBytes.Length);

            //    }

            //    return ms.ToArray();

            //}

        }

        /// <summary>

        /// 加密字符串

        /// </summary>

        /// <param name="input"></param>

        /// <paramname="sKey"></param>

        /// <returns></returns>

        public static stringEncryptString(string input, string sKey)

        {

            byte[] data =Encoding.UTF8.GetBytes(input);

            using (DESCryptoServiceProvider des= new DESCryptoServiceProvider())

            {

                des.Key =ASCIIEncoding.ASCII.GetBytes(sKey);

                des.IV =ASCIIEncoding.ASCII.GetBytes(sKey);

                ICryptoTransform desencrypt = des.CreateEncryptor();

                byte[] result =desencrypt.TransformFinalBlock(data, , data.Length);

                returnBitConverter.ToString(result);

            }

        }

        /// <summary>

        /// 解密字符串

        /// </summary>

        /// <paramname="input"></param>

        /// <paramname="sKey"></param>

        /// <returns></returns>

        public static stringDecryptString(string input, string sKey)

        {

            string[] sInput =input.Split("-".ToCharArray());

            byte[] data = new byte[sInput.Length];

            for (int i = ; i <sInput.Length; i++)

            {

                data[i] = byte.Parse(sInput[i],NumberStyles.HexNumber);

            }

            using (DESCryptoServiceProvider des= new DESCryptoServiceProvider())

            {

                des.Key =ASCIIEncoding.ASCII.GetBytes(sKey);

                des.IV =ASCIIEncoding.ASCII.GetBytes(sKey);

                ICryptoTransform desencrypt =des.CreateDecryptor();

                byte[] result =desencrypt.TransformFinalBlock(data, , data.Length);

                returnEncoding.UTF8.GetString(result);

            }

        }

        #endregion

        #region AES

        /// <summary>  

        /// AES加密算法  

        /// </summary>  

        /// <paramname="input">明文字符串</param>  

        /// <param name="key">密钥</param>  

        /// <returns>字符串</returns>  

        public static stringEncryptByAES(string input, string key)

        {

            byte[] keyBytes =Encoding.UTF8.GetBytes(key.Substring(, ));

            using (AesCryptoServiceProvideraesAlg = new AesCryptoServiceProvider())

            {

                aesAlg.Key = keyBytes;

                aesAlg.IV = AES_IV;

                ICryptoTransform encryptor =aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

                using (MemoryStream msEncrypt =new MemoryStream())

                {

                    using (CryptoStreamcsEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))

                    {

                        using (StreamWriterswEncrypt = new StreamWriter(csEncrypt))

                        {

                           swEncrypt.Write(input);

                        }

                        byte[] bytes =msEncrypt.ToArray();

                        //returnConvert.ToBase64String(bytes);//此方法不可用

                        returnBitConverter.ToString(bytes);

                    }

                }

            }

        }

        /// <summary>  

        /// AES解密  

        /// </summary>  

        /// <paramname="input">密文字节数组</param>  

        /// <param name="key">密钥</param>  

        /// <returns>返回解密后的字符串</returns>  

        public static stringDecryptByAES(string input, string key)

        {

            //byte[] inputBytes =Convert.FromBase64String(input); //Encoding.UTF8.GetBytes(input);

            string[] sInput =input.Split("-".ToCharArray());

            byte[] inputBytes = newbyte[sInput.Length];

            for (int i = ; i <sInput.Length; i++)

            {

                inputBytes[i] =byte.Parse(sInput[i], NumberStyles.HexNumber);

            }

            byte[] keyBytes =Encoding.UTF8.GetBytes(key.Substring(, ));

            using (AesCryptoServiceProvideraesAlg = new AesCryptoServiceProvider())

            {

                aesAlg.Key = keyBytes;

                aesAlg.IV = AES_IV;

                ICryptoTransform decryptor =aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

                using (MemoryStream msEncrypt =new MemoryStream(inputBytes))

                {

                    using (CryptoStreamcsEncrypt = new CryptoStream(msEncrypt, decryptor, CryptoStreamMode.Read))

                    {

                        using (StreamReadersrEncrypt = new StreamReader(csEncrypt))

                        {

                            returnsrEncrypt.ReadToEnd();

                        }

                    }

                }

            }

        }

        /// <summary> 

        /// AES加密        

        /// </summary> 

        /// <param name="inputdata">输入的数据</param>         

       /// <param name="iv">向量128位</param>         

       /// <param name="strKey">加密密钥</param>         

       /// <returns></returns> 

        public static byte[]EncryptByAES(byte[] inputdata, byte[] key, byte[] iv)

        {

            ////分组加密算法 

            //Aes aes = newAesCryptoServiceProvider();          

            ////设置密钥及密钥向量 

            //aes.Key = key;

            //aes.IV = iv;

            //using (MemoryStream ms = newMemoryStream())

            //{

            //    using (CryptoStream cs = newCryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))

            //    {

            //        using (StreamWriter writer = newStreamWriter(cs))

            //        {

            //            writer.Write(inputdata);

            //        }

            //        return ms.ToArray(); 

            //    }               

            //}

            using (AesCryptoServiceProvideraesAlg = new AesCryptoServiceProvider())

            {

                aesAlg.Key = key;

                aesAlg.IV = iv;

                ICryptoTransform encryptor =aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

                using (MemoryStream msEncrypt =new MemoryStream())

                {

                    using (CryptoStreamcsEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))

                    {

                        using (StreamWriterswEncrypt = new StreamWriter(csEncrypt))

                        {

                            swEncrypt.Write(inputdata);

                        }

                        byte[] encrypted =msEncrypt.ToArray();

                        return encrypted;

                    }

                }

            }

        }

       /// <summary>         

        /// AES解密         

        /// </summary> 

       /// <param name="inputdata">输入的数据</param>               

       /// <param name="key">key</param>         

       /// <param name="iv">向量128</param> 

        /// <returns></returns> 

        public static byte[]DecryptByAES(byte[] inputBytes, byte[] key, byte[] iv)

        {

            Aes aes = newAesCryptoServiceProvider();

            aes.Key = key;

            aes.IV = iv;

            byte[] decryptBytes;

            using (MemoryStream ms = newMemoryStream(inputBytes))

            {

                using (CryptoStream cs = newCryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Read))

                {

                    using (StreamReader reader= new StreamReader(cs))

                    {

                        string result =reader.ReadToEnd();

                        decryptBytes =Encoding.UTF8.GetBytes(result);

                    }

                }

            }

            return decryptBytes;

        }

        #endregion

        #region DSA

        #endregion

        #region RSA

        /// <summary>

        /// RSA加密

        /// </summary>

        /// <paramname="plaintext">明文</param>

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

        /// <returns>密文字符串</returns>

        public static stringEncryptByRSA(string plaintext, string publicKey)

        {

            UnicodeEncoding ByteConverter = newUnicodeEncoding();

            byte[] dataToEncrypt =ByteConverter.GetBytes(plaintext);

            using (RSACryptoServiceProvider RSA= new RSACryptoServiceProvider())

            {

                RSA.FromXmlString(publicKey);

                byte[] encryptedData =RSA.Encrypt(dataToEncrypt, false);

                return Convert.ToBase64String(encryptedData);

            }

        }

        /// <summary>

        /// RSA解密

        /// </summary>

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

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

        /// <returns>明文字符串</returns>

        public static stringDecryptByRSA(string ciphertext, string privateKey)

        {

            UnicodeEncoding byteConverter = newUnicodeEncoding();

            using (RSACryptoServiceProvider RSA= new RSACryptoServiceProvider())

            {

                RSA.FromXmlString(privateKey);

                byte[] encryptedData =Convert.FromBase64String(ciphertext);

                byte[] decryptedData =RSA.Decrypt(encryptedData, false);

                returnbyteConverter.GetString(decryptedData);

            }

        }

        //public static string signByRSA(stringplaintext, string privateKey)

        //{

        //   UnicodeEncoding ByteConverter = new UnicodeEncoding();

        //   byte[] dataToEncrypt = ByteConverter.GetBytes(plaintext);

        //   using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())

        //   {

        //        RSA.FromXmlString(privateKey);

        //        byte[] encryptedData =RSA.SignData(dataToEncrypt,);

        //        return Convert.ToBase64String(encryptedData);

        //   }

        //}

        /// <summary>

        /// 数字签名

        /// </summary>

        /// <paramname="plaintext">原文</param>

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

        /// <returns>签名</returns>

        public static stringHashAndSignString(string plaintext, string privateKey)

        {

            UnicodeEncoding ByteConverter = newUnicodeEncoding();

            byte[] dataToEncrypt =ByteConverter.GetBytes(plaintext);

            using (RSACryptoServiceProviderRSAalg = new RSACryptoServiceProvider())

            {

               RSAalg.FromXmlString(privateKey);

                //使用SHA1进行摘要算法,生成签名

                byte[] encryptedData =RSAalg.SignData(dataToEncrypt, new SHA1CryptoServiceProvider());

                returnConvert.ToBase64String(encryptedData);

            }

        }

        /// <summary>

        /// 验证签名

        /// </summary>

        /// <paramname="plaintext">原文</param>

        /// <paramname="SignedData">签名</param>

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

        /// <returns></returns>

        public static bool VerifySigned(stringplaintext, string SignedData, string publicKey)

        {

            using (RSACryptoServiceProviderRSAalg = new RSACryptoServiceProvider())

            {

               RSAalg.FromXmlString(publicKey);

                UnicodeEncoding ByteConverter =new UnicodeEncoding();

                byte[] dataToVerifyBytes =ByteConverter.GetBytes(plaintext);

                byte[] signedDataBytes =Convert.FromBase64String(SignedData);

                returnRSAalg.VerifyData(dataToVerifyBytes, new SHA1CryptoServiceProvider(),signedDataBytes);

            }

        }

        /// <summary>

        /// 获取Key

        /// 键为公钥,值为私钥

        /// </summary>

        /// <returns></returns>

        public static KeyValuePair<string,string> CreateRSAKey()

        {

            RSACryptoServiceProvider RSA = newRSACryptoServiceProvider();

            string privateKey =RSA.ToXmlString(true);

            string publicKey =RSA.ToXmlString(false);

            return new KeyValuePair<string,string>(publicKey, privateKey);

        }

        #endregion

        #region other

        /// <summary>

        /// 

        /// </summary>

        /// <param name="input"></param>

        /// <returns></returns>

        public static byte[] GetBytes(stringinput)

        {

            string[] sInput =input.Split("-".ToCharArray());

            byte[] inputBytes = newbyte[sInput.Length];

            for (int i = ; i <sInput.Length; i++)

            {

                inputBytes[i] =byte.Parse(sInput[i], NumberStyles.HexNumber);

            }

            return inputBytes;

        }

        #endregion

    }

}

NET实现RSA AES DES 字符串 加密解密以及SHA1 MD5加密的更多相关文章

  1. Asp.Net Core 2.0 项目实战(7)MD5加密、AES&DES对称加解密

    本文目录 1. 摘要 2. MD5加密封装 3. AES的加密.解密 4. DES加密/解密 5. 总结 1.  摘要 C#中常用的一些加密和解密方案,如:md5加密.RSA加密与解密和DES加密等, ...

  2. 各种加密解密函数(URL加密解密、sha1加密解密、des加密解密)

    原文:各种加密解密函数(URL加密解密.sha1加密解密.des加密解密) 普通hash函数如md5.sha1.base64等都是不可逆函数.虽然我们利用php可以利用这些函数写出可逆函数来.但是跨语 ...

  3. AES加密解密 助手类 CBC加密模式

    "; string result1 = AESHelper.AesEncrypt(str); string result2 = AESHelper.AesDecrypt(result1); ...

  4. 16位的MD5加密和32位MD5加密的区别

    16位的MD5加密和32位MD5加密的区别 MD5加密后所得到的通常是32位的编码,而在不少地方会用到16位的编码它们有什么区别呢?16位加密就是从32位MD5散列中把中间16位提取出来!其实破解16 ...

  5. 加密 解密 RSA & AES & DES

    git: https://github.com/XHTeng/XHCryptorTools rsa RSA加解密中必须考虑到的密钥长度.明文长度和密文长度问题.明文长度需要小于密钥长度,而密文长度则等 ...

  6. Android DES加密的CBC模式加密解密和ECB模式加密解密

    DES加密共有四种模式:电子密码本模式(ECB).加密分组链接模式(CBC).加密反馈模式(CFB)和输出反馈模式(OFB). CBC模式加密: import java.security.Key; i ...

  7. PHP中使用OpenSSL生成RSA公钥私钥及进行加密解密示例(非对称加密)

    php服务端与客户端交互.提供开放api时,通常需要对敏感的部分api数据传输进行数据加密,这时候rsa非对称加密就能派上用处了,下面通过一个例子来说明如何用php来实现数据的加密解密 先了解一下关于 ...

  8. Java常用的加密解密类(对称加密类)

    Java常用的加密解密类 原文转载至:http://blog.csdn.net/wyc_cs/article/details/8793198 原创 2013年04月12日 14:33:35 1704 ...

  9. 加密解密知识 php非对称加密

    function test1(){ $config = array( "digest_alg" => "sha1", "private_key_ ...

随机推荐

  1. 标准模板库(STL) map —— 初始化问题

    map 容器没有:.reverse成员: map 是关联式容器,会根据元素的键值自动排序: map 容器不是连续的线性空间: 标准 STL 使用 RB-tree 为底层机制 ⇒ 自动排序(关于键值): ...

  2. 编辑器vim简介

    vi简介 vi是"Visual interface"的简称,它在Linux上的地位就仿佛Edit程序在DOS上一样.它可以执行输出.删除.查找.替换.块操作等众多文本操作,而且用户 ...

  3. php定时任务(自己)

    php定时任务(自己) 一.总结 一句话总结:可用php.exe连接php文件和bat文件,bat文件在计划任务中可以设置定时执行, 二. 1.php 2.bat E: "D:\softwa ...

  4. SimpleDateFormat.format的简单使用小结

    format的用法 是将当前时间格式转换为指定格式 场景一:给定毫秒数或者当前系统时间,返回指定时间格式 输入         Date date=new Date();//获得系统当前的时间 //  ...

  5. Angular.js回想+学习笔记(1)【ng-app和ng-model】

    Angular.js中index.html简单结构: <!doctype html> <html ng-app> <head> <script src=&qu ...

  6. iOS开发- Xcode插件- 规范凝视生成器VVDocumenter 自己的见解

    xcode升级  VVDocumenter 插件失效怎么办?? 首先给个完整的安装參考:http://www.th7.cn/Program/IOS/201405/212030.shtml  參考这个能 ...

  7. 【t014】拯数

    [题目链接]:http://noi.qz5z.com/viewtask.asp?id=t014 [题意] [题解] 这个锁的序列,如果把末尾的0去掉; 然后再倒过来; 那么就是这个序列对应的格雷码了; ...

  8. 【最大M子段和】dp + 滚动数组

    题目描述 给定 n 个数求这 n 个数划分成互不相交的 m 段的最大 m 子段和. 给出一段整数序列 A1,A2,A3,A4,...,Ax,...,An ,其中 1≤x≤n≤1,000,000, -3 ...

  9. 改变事件绑定的this的问题

    以标准的DOM2级事件为例,第二个参数是一个函数,咱们改成bind,看看之后的this是啥. <!DOCTYPE html> <html lang="en"> ...

  10. 【codeforces 534A】Exam

    [题目链接]:http://codeforces.com/contest/534/problem/A [题意] 给你n个人,要求任意两个编号相邻的人不能相邻; 让你安排座位方案,使得最多人的可以入座 ...