Base64加密解密+DES加密解密+MD5加密解密+3DES加密加密

最新推荐文章于 2022-11-02 17:04:58 发布

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最新推荐文章于 2022-11-02 17:04:58 发布

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分类专栏： Base64加密解密+DES加密解密+MD5加密解密+3DE 文章标签： Base64加密解密+DES加密解密+MD5加密解密+3DE

本文链接：https://blog.youkuaiyun.com/xu1440879014/article/details/86217750

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本文详细介绍了多种加密解密技术，包括Base64、DES、3DES和MD5等算法的具体实现方式。提供了如何使用这些算法进行数据加密和解密的代码示例，适用于信息安全、数据保护和网络通讯等领域。

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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Security.Cryptography;
namespace ECFileTools
{

//需要引用的dll System.Runtime.Serialization

public sealed class EncryptUtils
{

#region Base64加密解密

/// <summary>

/// Base64加密

/// </summary>

/// <param name="input">需要加密的字符串</param>

/// <returns></returns>

public static string Base64Encrypt(string input)
{

return Base64Encrypt(input, new UTF8Encoding());

}

/// <summary>

/// Base64加密

/// </summary>

/// <param name="input">需要加密的字符串</param>

/// <param name="encode">字符编码</param>

/// <returns></returns>

public static string Base64Encrypt(string input, Encoding encode)
{

return Convert.ToBase64String(encode.GetBytes(input));

}

/// <summary>

/// Base64解密

/// </summary>

/// <param name="input">需要解密的字符串</param>

/// <returns></returns>

public static string Base64Decrypt(string input)
{

return Base64Decrypt(input, new UTF8Encoding());

}

/// <summary>

/// Base64解密

/// </summary>

/// <param name="input">需要解密的字符串</param>

/// <param name="encode">字符的编码</param>

/// <returns></returns>

public static string Base64Decrypt(string input, Encoding encode)
{

return encode.GetString(Convert.FromBase64String(input));

}

#endregion

#region DES加密解密

/// <summary>

/// DES加密

/// </summary>

/// <param name="data">加密数据</param>

/// <param name="key">8位字符的密钥字符串</param>

/// <param name="iv">8位字符的初始化向量字符串</param>

/// <returns></returns>

public static string DESEncrypt(string data, string key, string iv)
{

byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(key);

byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(iv);

DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

int i = cryptoProvider.KeySize;

MemoryStream ms = new MemoryStream();

CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);

StreamWriter sw = new StreamWriter(cst);

sw.Write(data);

sw.Flush();

cst.FlushFinalBlock();

sw.Flush();

return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);

}

/// <summary>

/// DES解密

/// </summary>

/// <param name="data">解密数据</param>

/// <param name="key">8位字符的密钥字符串(需要和加密时相同)</param>

/// <param name="iv">8位字符的初始化向量字符串(需要和加密时相同)</param>

/// <returns></returns>

public static string DESDecrypt(string data, string key, string iv)
{

byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(key);

byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(iv);

byte[] byEnc;

try
{

byEnc = Convert.FromBase64String(data);

}

catch
{

return null;

}

DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

MemoryStream ms = new MemoryStream(byEnc);

CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);

StreamReader sr = new StreamReader(cst);

return sr.ReadToEnd();

}

#endregion

#region MD5加密

/// <summary>

/// MD5加密

/// </summary>

/// <param name="input">需要加密的字符串</param>

/// <returns></returns>

public static string MD5Encrypt(string input)
{

return MD5Encrypt(input, new UTF8Encoding());

}

/// <summary>

/// MD5加密

/// </summary>

/// <param name="input">需要加密的字符串</param>

/// <param name="encode">字符的编码</param>

/// <returns></returns>

public static string MD5Encrypt(string input, Encoding encode)
{

MD5 md5 = new MD5CryptoServiceProvider();

byte[] t = md5.ComputeHash(encode.GetBytes(input));

StringBuilder sb = new StringBuilder(32);

for (int i = 0; i < t.Length; i++)

sb.Append(t[i].ToString("x").PadLeft(2, '0'));

return sb.ToString();

}

/// <summary>

/// MD5对文件流加密

/// </summary>

/// <param name="sr"></param>

/// <returns></returns>

public static string MD5Encrypt(Stream stream)
{

MD5 md5serv = MD5CryptoServiceProvider.Create();

byte[] buffer = md5serv.ComputeHash(stream);

StringBuilder sb = new StringBuilder();

foreach (byte var in buffer)

sb.Append(var.ToString("x2"));

return sb.ToString();

}

/// <summary>

/// MD5加密(返回16位加密串)

/// </summary>

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

/// <param name="encode"></param>

/// <returns></returns>

public static string MD5Encrypt16(string input, Encoding encode)
{

MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();

string result = BitConverter.ToString(md5.ComputeHash(encode.GetBytes(input)), 4, 8);

result = result.Replace("-", "");

return result;

}

#endregion

#region 3DES 加密解密

public static string DES3Encrypt(string data, string key)
{

TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();

DES.Key = ASCIIEncoding.ASCII.GetBytes(key);

DES.Mode = CipherMode.CBC;

DES.Padding = PaddingMode.PKCS7;

ICryptoTransform DESEncrypt = DES.CreateEncryptor();

byte[] Buffer = ASCIIEncoding.ASCII.GetBytes(data);

return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));

}

public static string DES3Decrypt(string data, string key)
{

TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();

DES.Key = ASCIIEncoding.ASCII.GetBytes(key);

DES.Mode = CipherMode.CBC;

DES.Padding = System.Security.Cryptography.PaddingMode.PKCS7;

ICryptoTransform DESDecrypt = DES.CreateDecryptor();

string result = "";
try
{
byte[] Buffer = Convert.FromBase64String(data);
result = ASCIIEncoding.ASCII.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
}
catch// (Exception e)
{

}
return result;

}

#endregion

}