.net加密

Microsoft .NET 中的简化加密

http://www.51cto.com/specbook/15/3407.htm



1.SHA1

using System.Security.Cryptography;

SHA1CryptoServiceProvider sha1=new SHA1CryptoServiceProvider();

string encryptedString = Convert.ToBase64String(sha1.ComputeHash(Encoding.UTF8.GetBytes("testPwd")));



2.MD5只是用的类不同

MD5CryptoServiceProvider md5=New MD5CryptoServiceProvider();

3.给散列算法加salt

private string CreateSalt()

{

byte[] bytSalt = new byte[8];

RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();

rng.GetBytes(bytSalt);

return Convert.ToBase64String(bytSalt);

}



4.DES(64位)

SymmetricAlgorithm mCSP =new DESCryptoServiceProvider();

mCSP.GenerateKey();

mCSP.GenerateIV();

string txtKey= Convert.ToBase64String(mCSP.Key);

string txtIV= Convert.ToBase64String(mCSP.IV);



private string EncryptString(string Value)

{

ICryptoTransform ct;

MemoryStream ms;

CryptoStream cs;

byte[] byt;



ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV);

byt = Encoding.UTF8.GetBytes(Value);

ms = new MemoryStream();

cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);

cs.Write(byt, 0, byt.Length);

cs.FlushFinalBlock();

cs.Close();



return Convert.ToBase64String(ms.ToArray());

}



private string DecryptString(string Value)

{

ICryptoTransform ct;

MemoryStream ms;

CryptoStream cs;

byte[] byt;



ct = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV);

byt = Convert.FromBase64String(Value);

ms = new MemoryStream();

cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);

cs.Write(byt, 0, byt.Length);

cs.FlushFinalBlock();

cs.Close();



return Encoding.UTF8.GetString(ms.ToArray());

}

5.TripleDES(192位)

SymmetricAlgorithm mCSP =new TripleDESCryptoServiceProvider();





6.Rijndael

RijndaelManaged objRijndaelManaged=new=RijndaelManaged();