我正在尝试从我的数据库中验证经过哈希加密的密码。我在用户表用户名,哈希和盐中创建了一个列。现在我想知道我可以使用datareader访问其他列的值。
我尝试过这种方法,但出现红线。这也是我失败的尝试
public static bool VerifyPassword(string enteredPassword, string storedHash, string storedSalt)
{
var saltBytes = Convert.FromBase64String(storedSalt);
var rfc2898DeriveBytes = new Rfc2898DeriveBytes(enteredPassword, saltBytes, 10000);
return Convert.ToBase64String(rfc2898DeriveBytes.GetBytes(256)) == storedHash;
}
private void bunifuFlatButton1_Click(object sender, EventArgs e)
{
string userhash;
string usersalt;
MySqlConnection mysqlCon = new MySqlConnection(connectionString);
MySqlCommand cmd = new MySqlCommand("SELECT * FROM login.info WHERE username = @user", mysqlCon);
MySqlDataReader rd;
rd = cmd.ExecuteReader();
cmd.Parameters.Add("@user", MySqlDbType.VarChar).Value = username.Text;
mysqlCon.Open();
while (rd.Read())
{
userhash = rd.GetString("hash");
usersalt = rd.GetString("salt");
bool isPasswordMatched = VerifyPassword(textpass.Text, userhash.Hash, usersalt.Salt);
// i got redline error in here. i only follow instruction.. link below
if (isPasswordMatched)
{
//Login Successfull
}
else
{
//Login Failed
}
}
}
顺便说一句,我只从该线程遵循此指令。 How to validate salted and hashed password in c#
这是另一种编写代码的方法,不是真正的答案,但是...不是很完美的主意,但是至少它会处理对象并以正确的顺序调用它们。请继续阅读IDisposable和Sql Injection。
private void bunifuFlatButton1_Click(object sender, EventArgs e)
{
using (MySqlConnection mysqlCon = new MySqlConnection(connectionString))
{
// Use a named list of fields please. And cleanse the text.
using (MySqlCommand cmd = new MySqlCommand("SELECT * FROM login.info WHERE username = @user", mysqlCon))
{
cmd.Parameters.Add("@user", MySqlDbType.VarChar).Value = username.Text; // Let's hope user name is not Jimmy DropTables!!
mysqlCon.Open();
using (MySqlDataReader rd = cmd.ExecuteReader())
{
while (rd.Read())
{
string userhash = rd.GetString("hash");
string usersalt = rd.GetString("salt");
bool isPasswordMatched = VerifyPassword(textpass.Text, userhash, usersalt);
// Note that we are passing in strings, not props of an unknown object
if (isPasswordMatched)
{
//Login Successfull
}
else
{
//Login Failed
}
}
}
mysqlCon.Close();
}
}
}