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对称加密(DES)
using
System;
using
System.Collections.Generic;
using
System.Text;
using
System.Security.Cryptography;
using
System.IO;
namespace
Component
{
public
class
Security
{
public
Security()
{
}
//
默认密钥向量
private
static
byte
[] Keys
=
{
0x12
,
0x34
,
0x56
,
0x78
,
0x90
,
0xAB
,
0xCD
,
0xEF
}
;
/**/
/**/
/**/
///
<summary>
///
DES加密字符串
///
</summary>
///
<param name="encryptString">
待加密的字符串
</param>
///
<param name="encryptKey">
加密密钥,要求为8位
</param>
///
<returns>
加密成功返回加密后的字符串,失败返回源串
</returns>
public
static
string
EncryptDES(
string
encryptString,
string
encryptKey)
{
try
{
byte
[] rgbKey
=
Encoding.UTF8.GetBytes(encryptKey.Substring(
0
,
8
));
byte
[] rgbIV
=
Keys;
byte
[] inputByteArray
=
Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP
=
new
DESCryptoServiceProvider();
MemoryStream mStream
=
new
MemoryStream();
CryptoStream cStream
=
new
CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray,
0
, inputByteArray.Length);
cStream.FlushFinalBlock();
return
Convert.ToBase64String(mStream.ToArray());
}
catch
{
return
encryptString;
}
}
/**/
/**/
/**/
///
<summary>
///
DES解密字符串
///
</summary>
///
<param name="decryptString">
待解密的字符串
</param>
///
<param name="decryptKey">
解密密钥,要求为8位,和加密密钥相同
</param>
///
<returns>
解密成功返回解密后的字符串,失败返源串
</returns>
public
static
string
DecryptDES(
string
decryptString,
string
decryptKey)
{
try
{
byte
[] rgbKey
=
Encoding.UTF8.GetBytes(decryptKey);
byte
[] rgbIV
=
Keys;
byte
[] inputByteArray
=
Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP
=
new
DESCryptoServiceProvider();
MemoryStream mStream
=
new
MemoryStream();
CryptoStream cStream
=
new
CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray,
0
, inputByteArray.Length);
cStream.FlushFinalBlock();
return
Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return
decryptString;
}
}
}
}
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原文地址:https://www.cnblogs.com/weixu/p/864342.html
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