|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
方法一：
//须添加对System.Web的引用
using
System.Web.Security;
...
/// <summary>
/// SHA1加密字符串
/// </summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
public
string
SHA1(
string
source)
{
return
FormsAuthentication.HashPasswordForStoringInConfigFile(source,
"SHA1"
);
}
/// <summary>
/// MD5加密字符串
/// </summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
public
string
MD5(
string
source)
{
return
FormsAuthentication.HashPasswordForStoringInConfigFile(source,
"MD5"
);;
}
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
方法二(可逆加密解密)：
using
System.Security.Cryptography;
...
public
string
Encode(
string
data)
{
byte
[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte
[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
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);
}
public
string
Decode(
string
data)
{
byte
[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte
[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
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();
}
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
方法三(MD5不可逆)：
using
System.Security.Cryptography;
...
//MD5不可逆加密
//32位加密
public
string
GetMD5_32(
string
s,
string
_input_charset)
{
MD5 md5 =
new
MD5CryptoServiceProvider();
byte
[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
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();
}
//16位加密
public
static
string
GetMd5_16(
string
ConvertString)
{
MD5CryptoServiceProvider md5 =
new
MD5CryptoServiceProvider();
string
t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
t2 = t2.Replace(
"-"
,
""
);
return
t2;
}
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
方法四(对称加密)：
using
System.IO;
using
System.Security.Cryptography;
...
private
SymmetricAlgorithm mobjCryptoService;
private
string
Key;
/// <summary>
/// 对称加密类的构造函数
/// </summary>
public
SymmetricMethod()
{
mobjCryptoService =
new
RijndaelManaged();
Key =
"Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7"
;
}
/// <summary>
/// 获得密钥
/// </summary>
/// <returns>密钥</returns>
private
byte
[] GetLegalKey()
{
string
sTemp = Key;
mobjCryptoService.GenerateKey();
byte
[] bytTemp = mobjCryptoService.Key;
int
KeyLength = bytTemp.Length;
if
(sTemp.Length > KeyLength)
sTemp = sTemp.Substring(0, KeyLength);
else
if
(sTemp.Length < KeyLength)
sTemp = sTemp.PadRight(KeyLength,
' '
);
return
ASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 获得初始向量IV
/// </summary>
/// <returns>初试向量IV</returns>
private
byte
[] GetLegalIV()
{
string
sTemp =
"E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk"
;
mobjCryptoService.GenerateIV();
byte
[] bytTemp = mobjCryptoService.IV;
int
IVLength = bytTemp.Length;
if
(sTemp.Length > IVLength)
sTemp = sTemp.Substring(0, IVLength);
else
if
(sTemp.Length < IVLength)
sTemp = sTemp.PadRight(IVLength,
' '
);
return
ASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 加密方法
/// </summary>
/// <param name="Source">待加密的串</param>
/// <returns>经过加密的串</returns>
public
string
Encrypto(
string
Source)
{
byte
[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
MemoryStream ms =
new
MemoryStream();
mobjCryptoService.Key = GetLegalKey();
mobjCryptoService.IV = GetLegalIV();
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
CryptoStream cs =
new
CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
ms.Close();
byte
[] bytOut = ms.ToArray();
return
Convert.ToBase64String(bytOut);
}
/// <summary>
/// 解密方法
/// </summary>
/// <param name="Source">待解密的串</param>
/// <returns>经过解密的串</returns>
public
string
Decrypto(
string
Source)
{
byte
[] bytIn = Convert.FromBase64String(Source);
MemoryStream ms =
new
MemoryStream(bytIn, 0, bytIn.Length);
mobjCryptoService.Key = GetLegalKey();
mobjCryptoService.IV = GetLegalIV();
ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
CryptoStream cs =
new
CryptoStream(ms, encrypto, CryptoStreamMode.Read);
StreamReader sr =
new
StreamReader(cs);
return
sr.ReadToEnd();
}
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
方法五：
using
System.IO;
using
System.Security.Cryptography;
using
System.Text;
...
//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;
}
}
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
方法六(文件加密)：
using
System.IO;
using
System.Security.Cryptography;
using
System.Text;
...
//加密文件
private
static
void
EncryptData(String inName, String outName,
byte
[] desKey,
byte
[] desIV)
{
//Create the file streams to handle the input and output files.
FileStream fin =
new
FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream fout =
new
FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
//Create variables to help with read and write.
byte
[] bin =
new
byte
[100];
//This is intermediate storage for the encryption.
long
rdlen = 0;
//This is the total number of bytes written.
long
totlen = fin.Length;
//This is the total length of the input file.
int
len;
//This is the number of bytes to be written at a time.
DES des =
new
DESCryptoServiceProvider();
CryptoStream encStream =
new
CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);
//Read from the input file, then encrypt and write to the output file.
while
(rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
encStream.Close();
fout.Close();
fin.Close();
}
//解密文件
private
static
void
DecryptData(String inName, String outName,
byte
[] desKey,
byte
[] desIV)
{
//Create the file streams to handle the input and output files.
FileStream fin =
new
FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream fout =
new
FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
//Create variables to help with read and write.
byte
[] bin =
new
byte
[100];
//This is intermediate storage for the encryption.
long
rdlen = 0;
//This is the total number of bytes written.
long
totlen = fin.Length;
//This is the total length of the input file.
int
len;
//This is the number of bytes to be written at a time.
DES des =
new
DESCryptoServiceProvider();
CryptoStream encStream =
new
CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);
//Read from the input file, then encrypt and write to the output file.
while
(rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
encStream.Close();
fout.Close();
fin.Close();
}
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
using
System;
using
System.Security.Cryptography;
//这个是处理文字编码的前提
using
System.Text;
using
System.IO;
/// <summary>
/// DES加密方法
/// </summary>
/// <param name="strPlain">明文</param>
/// <param name="strDESKey">密钥</param>
/// <param name="strDESIV">向量</param>
/// <returns>密文</returns>
public
string
DESEncrypt(
string
strPlain,
string
strDESKey,
string
strDESIV)
{
//把密钥转换成字节数组
byte
[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);
//把向量转换成字节数组
byte
[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);
//声明1个新的DES对象
DESCryptoServiceProvider desEncrypt=
new
DESCryptoServiceProvider();
//开辟一块内存流
MemoryStream msEncrypt=
new
MemoryStream();
//把内存流对象包装成加密流对象
CryptoStream csEncrypt=
new
CryptoStream(msEncrypt,desEncrypt.CreateEncryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Write);
//把加密流对象包装成写入流对象
StreamWriter swEncrypt=
new
StreamWriter(csEncrypt);
//写入流对象写入明文
swEncrypt.WriteLine(strPlain);
//写入流关闭
swEncrypt.Close();
//加密流关闭
csEncrypt.Close();
//把内存流转换成字节数组，内存流现在已经是密文了
byte
[] bytesCipher=msEncrypt.ToArray();
//内存流关闭
msEncrypt.Close();
//把密文字节数组转换为字符串，并返回
return
UnicodeEncoding.Unicode.GetString(bytesCipher);
}
/// <summary>
/// DES解密方法
/// </summary>
/// <param name="strCipher">密文</param>
/// <param name="strDESKey">密钥</param>
/// <param name="strDESIV">向量</param>
/// <returns>明文</returns>
public
string
DESDecrypt(
string
strCipher,
string
strDESKey,
string
strDESIV)
{
//把密钥转换成字节数组
byte
[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);
//把向量转换成字节数组
byte
[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);
//把密文转换成字节数组
byte
[] bytesCipher=UnicodeEncoding.Unicode.GetBytes(strCipher);
//声明1个新的DES对象
DESCryptoServiceProvider desDecrypt=
new
DESCryptoServiceProvider();
//开辟一块内存流，并存放密文字节数组
MemoryStream msDecrypt=
new
MemoryStream(bytesCipher);
//把内存流对象包装成解密流对象
CryptoStream csDecrypt=
new
CryptoStream(msDecrypt,desDecrypt.CreateDecryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Read);
//把解密流对象包装成读出流对象
StreamReader srDecrypt=
new
StreamReader(csDecrypt);
//明文=读出流的读出内容
string
strPlainText=srDecrypt.ReadLine();
//读出流关闭
srDecrypt.Close();
//解密流关闭
csDecrypt.Close();
//内存流关闭
msDecrypt.Close();
//返回明文
return
strPlainText;
}
|
本文转自曾祥展博客园博客，原文链接：http://www.cnblogs.com/zengxiangzhan/archive/2010/01/30/1659687.html
，如需转载请自行联系原作者
