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C#中使用DES和AES加密解密

發(fā)布時(shí)間：2023/12/10 C# 24 豆豆

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代碼using?System;
using?System.Text;
using?System.Security.Cryptography;
using?System.IO;

namespace?MyCryptography
{
????///?<summary>
????///?DES加密解密
????///?</summary>
????public?class?DES
????{
????????///?<summary>
????????///?獲取密鑰
????????///?</summary>
????????private?static?string?Key
????????{
????????????get?{?return?@"P@+#wG+Z";?}
????????}

????????///?<summary>
????????///?獲取向量
????????///?</summary>
????????private?static?string?IV
????????{
????????????get?{?return?@"L%n67}G\Mk@k%:~Y";?}
????????}

????????///?<summary>
????????///?DES加密
????????///?</summary>
????????///?<param?name="plainStr">明文字符串</param>
????????///?<returns>密文</returns>
????????public?static?string?DESEncrypt(string?plainStr)
????????{
????????????byte[]?bKey?=?Encoding.UTF8.GetBytes(Key);
????????????byte[]?bIV?=?Encoding.UTF8.GetBytes(IV);
????????????byte[]?byteArray?=?Encoding.UTF8.GetBytes(plainStr);

????????????string?encrypt?=?null;
????????????DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();
????????????try
????????????{
????????????????using?(MemoryStream?mStream?=?new?MemoryStream())
????????????????{
????????????????????using?(CryptoStream?cStream?=?new?CryptoStream(mStream,?des.CreateEncryptor(bKey,?bIV),?CryptoStreamMode.Write))
????????????????????{
????????????????????????cStream.Write(byteArray,?0,?byteArray.Length);
????????????????????????cStream.FlushFinalBlock();
????????????????????????encrypt?=?Convert.ToBase64String(mStream.ToArray());
????????????????????}
????????????????}
????????????}
????????????catch?{?}
????????????des.Clear();

????????????return?encrypt;
????????}

????????///?<summary>
????????///?DES解密
????????///?</summary>
????????///?<param?name="encryptStr">密文字符串</param>
????????///?<returns>明文</returns>
????????public?static?string?DESDecrypt(string?encryptStr)
????????{
????????????byte[]?bKey?=?Encoding.UTF8.GetBytes(Key);
????????????byte[]?bIV?=?Encoding.UTF8.GetBytes(IV);
????????????byte[]?byteArray?=?Convert.FromBase64String(encryptStr);

????????????string?decrypt?=?null;
????????????DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();
????????????try
????????????{
????????????????using?(MemoryStream?mStream?=?new?MemoryStream())
????????????????{
????????????????????using?(CryptoStream?cStream?=?new?CryptoStream(mStream,?des.CreateDecryptor(bKey,?bIV),?CryptoStreamMode.Write))
????????????????????{
????????????????????????cStream.Write(byteArray,?0,?byteArray.Length);
????????????????????????cStream.FlushFinalBlock();
????????????????????????decrypt?=?Encoding.UTF8.GetString(mStream.ToArray());
????????????????????}
????????????????}
????????????}
????????????catch?{?}
????????????des.Clear();

????????????return?decrypt;
????????}
????}

????///?<summary>
????///?AES加密解密
????///?</summary>
????public?class?AES
????{
????????///?<summary>
????????///?獲取密鑰
????????///?</summary>
????????private?static?string?Key
????????{
????????????get?{?return?@")O[NB]6,YF}+efcaj{+oESb9d8>Z'e9M";?}
????????}

????????///?<summary>
????????///?獲取向量
????????///?</summary>
????????private?static?string?IV
????????{
????????????get?{?return?@"L+\~f4,Ir)b$=pkf";?}
????????}

????????///?<summary>
????????///?AES加密
????????///?</summary>
????????///?<param?name="plainStr">明文字符串</param>
????????///?<returns>密文</returns>
????????public?static?string?AESEncrypt(string?plainStr)
????????{
????????????byte[]?bKey?=?Encoding.UTF8.GetBytes(Key);
????????????byte[]?bIV?=?Encoding.UTF8.GetBytes(IV);
????????????byte[]?byteArray?=?Encoding.UTF8.GetBytes(plainStr);

????????????string?encrypt?=?null;
????????????Rijndael?aes?=?Rijndael.Create();
????????????try
????????????{
????????????????using?(MemoryStream?mStream?=?new?MemoryStream())
????????????????{
????????????????????using?(CryptoStream?cStream?=?new?CryptoStream(mStream,?aes.CreateEncryptor(bKey,?bIV),?CryptoStreamMode.Write))
????????????????????{
????????????????????????cStream.Write(byteArray,?0,?byteArray.Length);
????????????????????????cStream.FlushFinalBlock();
????????????????????????encrypt?=?Convert.ToBase64String(mStream.ToArray());
????????????????????}
????????????????}
????????????}
????????????catch?{?}
????????????aes.Clear();

????????????return?encrypt;
????????}

????????///?<summary>
????????///?AES加密
????????///?</summary>
????????///?<param?name="plainStr">明文字符串</param>
????????///?<param?name="returnNull">加密失敗時(shí)是否返回?null，false?返回?String.Empty</param>
????????///?<returns>密文</returns>
????????public?static?string?AESEncrypt(string?plainStr,?bool?returnNull)
????????{
????????????string?encrypt?=?AESEncrypt(plainStr);
????????????return?returnNull???encrypt?:?(encrypt?==?null???String.Empty?:?encrypt);
????????}

????????///?<summary>
????????///?AES解密
????????///?</summary>
????????///?<param?name="encryptStr">密文字符串</param>
????????///?<returns>明文</returns>
????????public?static?string?AESDecrypt(string?encryptStr)
????????{
????????????byte[]?bKey?=?Encoding.UTF8.GetBytes(Key);
????????????byte[]?bIV?=?Encoding.UTF8.GetBytes(IV);
????????????byte[]?byteArray?=?Convert.FromBase64String(encryptStr);

????????????string?decrypt?=?null;
????????????Rijndael?aes?=?Rijndael.Create();
????????????try
????????????{
????????????????using?(MemoryStream?mStream?=?new?MemoryStream())
????????????????{
????????????????????using?(CryptoStream?cStream?=?new?CryptoStream(mStream,?aes.CreateDecryptor(bKey,?bIV),?CryptoStreamMode.Write))
????????????????????{
????????????????????????cStream.Write(byteArray,?0,?byteArray.Length);
????????????????????????cStream.FlushFinalBlock();
????????????????????????decrypt?=?Encoding.UTF8.GetString(mStream.ToArray());
????????????????????}
????????????????}
????????????}
????????????catch?{?}
????????????aes.Clear();

????????????return?decrypt;
????????}

????????///?<summary>
????????///?AES解密
????????///?</summary>
????????///?<param?name="encryptStr">密文字符串</param>
????????///?<param?name="returnNull">解密失敗時(shí)是否返回?null，false?返回?String.Empty</param>
????????///?<returns>明文</returns>
????????public?static?string?AESDecrypt(string?encryptStr,?bool?returnNull)
????????{
????????????string?decrypt?=?AESDecrypt(encryptStr);
????????????return?returnNull???decrypt?:?(decrypt?==?null???String.Empty?:?decrypt);
????????}
????}
}

轉(zhuǎn)載于:https://www.cnblogs.com/kevin-top/archive/2010/07/01/1769351.html

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