加密

1：我们经常的加密【md5】

System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile("welcom", System.Web.Configuration.FormsAuthPasswordFormat.MD5);

2：李天平老师的一个加密class

 

 1namespace LTP.Common.DEncrypt
 2{
 3    using System;
 4    using System.Security.Cryptography;
 5    using System.Text;
 6
 7    public class DEncrypt
 8    {
 9        public static byte[] Decrypt(byte[] encrypted)
10        {
11            byte[] bytes = Encoding.Default.GetBytes("LITIANPING");
12            return Decrypt(encrypted, bytes);
13        }
14
15        public static string Decrypt(string original)
16        {
17            return Decrypt(original, "LITIANPING", Encoding.Default);
18        }
19
20        public static byte[] Decrypt(byte[] encrypted, byte[] key)
21        {
22            TripleDESCryptoServiceProvider provider = new TripleDESCryptoServiceProvider();
23            provider.Key = MakeMD5(key);
24            provider.Mode = CipherMode.ECB;
25            return provider.CreateDecryptor().TransformFinalBlock(encrypted, 0, encrypted.Length);
26        }
27
28        public static string Decrypt(string original, string key)
29        {
30            return Decrypt(original, key, Encoding.Default);
31        }
32
33        public static string Decrypt(string encrypted, string key, Encoding encoding)
34        {
35            byte[] buffer = Convert.FromBase64String(encrypted);
36            byte[] bytes = Encoding.Default.GetBytes(key);
37            return encoding.GetString(Decrypt(buffer, bytes));
38        }
39
40        public static string Encrypt(string original)
41        {
42            return Encrypt(original, "LITIANPING");
43        }
44
45        public static byte[] Encrypt(byte[] original)
46        {
47            byte[] bytes = Encoding.Default.GetBytes("LITIANPING");
48            return Encrypt(original, bytes);
49        }
50
51        public static string Encrypt(string original, string key)
52        {
53            byte[] bytes = Encoding.Default.GetBytes(original);
54            byte[] buffer2 = Encoding.Default.GetBytes(key);
55            return Convert.ToBase64String(Encrypt(bytes, buffer2));
56        }
57
58        public static byte[] Encrypt(byte[] original, byte[] key)
59        {
60            TripleDESCryptoServiceProvider provider = new TripleDESCryptoServiceProvider();
61            provider.Key = MakeMD5(key);
62            provider.Mode = CipherMode.ECB;
63            return provider.CreateEncryptor().TransformFinalBlock(original, 0, original.Length);
64        }
65
66        public static byte[] MakeMD5(byte[] original)
67        {
68            byte[] buffer = new MD5CryptoServiceProvider().ComputeHash(original);
69            return buffer;
70        }
71    }
72}
73
74

 

 1namespace LTP.Common.DEncrypt
 2{
 3    using System;
 4    using System.IO;
 5    using System.Security.Cryptography;
 6    using System.Text;
 7    using System.Web.Security;
 8
 9    public class DESEncrypt
10    {
11        public static string Decrypt(string Text)
12        {
13            return Decrypt(Text, "litianping");
14        }
15
16        public static string Decrypt(string Text, string sKey)
17        {
18            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
19            int num = Text.Length / 2;
20            byte[] buffer = new byte[num];
21            for (int i = 0; i < num; i++)
22            {
23                int num3 = Convert.ToInt32(Text.Substring(i * 2, 2), 0x10);
24                buffer[i] = (byte) num3;
25            }
26            provider.Key = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
27            provider.IV = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
28            MemoryStream stream = new MemoryStream();
29            CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
30            stream2.Write(buffer, 0, buffer.Length);
31            stream2.FlushFinalBlock();
32            return Encoding.Default.GetString(stream.ToArray());
33        }
34
35        public static string Encrypt(string Text)
36        {
37            return Encrypt(Text, "litianping");
38        }
39
40        public static string Encrypt(string Text, string sKey)
41        {
42            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
43            byte[] bytes = Encoding.Default.GetBytes(Text);
44            provider.Key = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
45            provider.IV = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
46            MemoryStream stream = new MemoryStream();
47            CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
48            stream2.Write(bytes, 0, bytes.Length);
49            stream2.FlushFinalBlock();
50            StringBuilder builder = new StringBuilder();
51            foreach (byte num in stream.ToArray())
52            {
53                builder.AppendFormat("{0:X2}", num);
54            }
55            return builder.ToString();
56        }
57    }
58}
59
60