都是使用MD5加密,推荐一篇文档给你。有很详细的加密和解密方法,还有就是C#中有自带的加密和解密方法。随便你使用哪种。
密码用md5加密保存到数据库,然后用户登录时你把他的密码在MD5加密一次跟数据库里面的比较就行了。
方法:
密码子段类型为binary(50)。应用System Security.Cryptography名称空间下的SHA1类的ComputeHash()方法将字符密码进行哈希散列运算转换为byte[]类型对象,保存入数据库。
实例:
//哈系散列转换
public byte[] getSaltedPassword(string password)
{
SHA1 sha1=SHA1.Create();
//应用System.Text空间下的Unicode.GetBytes方法获得byte.
byte[] bytePassword=sha1.ComputeHash(Encoding.Unicode.GetBytes(password));
return bytePassword;
}
//数据存入,直接将byte[]保存入binary字段
public int AccountRegister(string accountName,string password,string email)
{
byte[] bytePassword = this.getSaltedPassword(password);
SqlConnection myConnection = new SqlConnection(this.GetConnStr);
myConnection.Open();
SqlCommand myCommand = new SqlCommand("Account_Add",myConnection);
myCommand.CommandType=CommandType.StoredProcedure;
SqlParameter prmAccountName=myCommand.Parameters.Add(new SqlParameter("@AccountName",SqlDbType.VarChar,50));
prmAccountName.Value=accountName;
SqlParameter prmPassword=myCommand.Parameters.Add(new SqlParameter("@password",SqlDbType.Binary,50));
prmPassword.Value=bytePassword;
SqlParameter prmEmail=myCommand.Parameters.Add(new SqlParameter("@email",SqlDbType.VarChar,50));
prmEmail.Value=email;
int myInt=myCommand.ExecuteNonQuery();
myCommand.Dispose();
myConnection.Close();
return myInt;
}
//密码比较。将字符密码转换为哈西散列后直接与数据库binary密码字段比较
public int AccountVerify(string accountName,string password)
{
byte[] bytePassword = this.getSaltedPassword(password);
SqlConnection myConnection = new SqlConnection(this.GetConnStr);
myConnection.Open();
SqlCommand myCommand = new SqlCommand("Account_Check",myConnection);
myCommand.CommandType=CommandType.StoredProcedure;
SqlParameter prmAccountName=myCommand.Parameters.Add(new SqlParameter("@AccountName",SqlDbType.VarChar,50));
prmAccountName.Value=accountName;
SqlParameter prmPassword=myCommand.Parameters.Add(new SqlParameter("@password",SqlDbType.Binary,50));
prmPassword.Value=bytePassword;
SqlParameter prmReturnValue=myCommand.Parameters.Add(new SqlParameter("@Return_Value",SqlDbType.Int,4));
prmReturnValue.Direction=ParameterDirection.ReturnValue;
myCommand.ExecuteNonQuery();
int accountID=(int)prmReturnValue.Value;
myCommand.Dispose();
myConnection.Close();
return accountID;
}
//相关Store procedure
//登陆验证
CREATE PROCEDURE Account_Check @AccountName varchar(50),@Password binary(50)
AS
Declare @AccountId int;
Select @AccountId= AccountID From Accounts
Where accountName=@accountname;
If isnull(@AccountID,0)=0
Select @AccountId= -1; --//账号错误!
Else
Begin
Select @accountID=null
Select @AccountId= AccountID From Accounts
Where accountName=@accountname and password=@password;
If isnull(@AccountID,0)=0
Select @AccountID=0; --//密码错误!
End
Return @AccountID;
//用户增加
CREATE PROCEDURE Account_Add @accountName varchar(50),@password binary (50),@email varchar(50)
AS
insert into Accounts(accountName,password,email)
values(@accountName,@password,@email);
return @@Error;
希望可以帮到你
FormsAuthentication.HashPasswordForStoringInConfigFile(this.TextBox2.Text, "md5");//使用MD5加密
不解密就MD5,sha-1这类hash加密,解密的话,自己写加密算法。。。