字符串加密解密类[封装][C#][asp.net]
这个字符串加密解密类是广大程序员必不可少的[静态类]
using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;
//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;
}
}
代码
1
using
System;
2
using
System.Text;
3
using
System.Security.Cryptography;
4
using
System.IO;
5
6
7
8
//
默认密钥向量
9
private
static
byte
[] Keys
=
{
0x12
,
0x34
,
0x56
,
0x78
,
0x90
,
0xAB
,
0xCD
,
0xEF
};
10
///
<summary>
11
///
DES加密字符串
12
///
</summary>
13
///
<param name="encryptString">
待加密的字符串
</param>
14
///
<param name="encryptKey">
加密密钥,要求为8位
</param>
15
///
<returns>
加密成功返回加密后的字符串，失败返回源串
</returns>
16
public
static
string
EncryptDES(
string
encryptString,
string
encryptKey)
17
{
18
try
19
{
20
byte
[] rgbKey
=
Encoding.UTF8.GetBytes(encryptKey.Substring(
0
,
8
));
21
byte
[] rgbIV
=
Keys;
22
byte
[] inputByteArray
=
Encoding.UTF8.GetBytes(encryptString);
23
DESCryptoServiceProvider dCSP
=
new
DESCryptoServiceProvider();
24
MemoryStream mStream
=
new
MemoryStream();
25
CryptoStream cStream
=
new
CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
26
cStream.Write(inputByteArray,
0
, inputByteArray.Length);
27
cStream.FlushFinalBlock();
28
return
Convert.ToBase64String(mStream.ToArray());
29
}
30
catch
31
{
32
return
encryptString;
33
}
34
}
35
36
///
<summary>
37
///
DES解密字符串
38
///
</summary>
39
///
<param name="decryptString">
待解密的字符串
</param>
40
///
<param name="decryptKey">
解密密钥,要求为8位,和加密密钥相同
</param>
41
///
<returns>
解密成功返回解密后的字符串，失败返源串
</returns>
42
public
static
string
DecryptDES(
string
decryptString,
string
decryptKey)
43
{
44
try
45
{
46
byte
[] rgbKey
=
Encoding.UTF8.GetBytes(decryptKey);
47
byte
[] rgbIV
=
Keys;
48
byte
[] inputByteArray
=
Convert.FromBase64String(decryptString);
49
DESCryptoServiceProvider DCSP
=
new
DESCryptoServiceProvider();
50
MemoryStream mStream
=
new
MemoryStream();
51
CryptoStream cStream
=
new
CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
52
cStream.Write(inputByteArray,
0
, inputByteArray.Length);
53
cStream.FlushFinalBlock();
54
return
Encoding.UTF8.GetString(mStream.ToArray());
55
}
56
catch
57
{
58
return
decryptString;
59
}
60
}
var strSource = Request.Forms["xxx"].value;
//加密
var strResult = EncryptDES(strSource,"123456");
//解密
var strRevert = DecryptDES(strResult ,"123456");