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我在這裏查看了一下stackoverflow以及Google，但無法找到與我的問題有關的答案，所以我在此處發佈它。使用會話對用戶名和密碼進行身份驗證
我有一個登錄頁面，用戶被指示輸入他們的用戶名和密碼，這些都存儲在MySQL數據庫中。用戶名以純文本形式存儲，並且密碼被散列（使用CrackStation - https://crackstation.net/hashing-security.htm#aspsourcecode），並將散列存儲在數據庫中。我可以使用用戶名和密碼成功登錄一次，但我想使用SESSION，以便用戶可以瀏覽網站，而不必每次登錄到不同的頁面時登錄。我很容易在我的測試環境中使用SESSION，因爲密碼是以純文本形式存儲的，但是現在密碼被散列，我無法讓Session在我的代碼中工作。所以我想知道我能做些什麼來讓密碼在SESSION中驗證。
我的代碼，我用我的登錄頁面如下：
protected void Page_Load(object sender, EventArgs e)
{
try
{
admin = Convert.ToInt16(Request.QueryString["Admin"]);
Instructor = Convert.ToInt16(Request.QueryString["Inst"]);
if (Session["username"] == null || (string)(Session["username"]) == "")
{
token = Request.QueryString["tokenNumber"];
lblUsername.Visible = true;
txtUsername.Visible = true;
lblPassword.Visible = true;
txtPassword.Visible = true;
btnlogin.Visible = true;
}
else if (Session["username"] != null || (string)(Session["username"]) != "")
{
username = (string)Session["username"];
userType = (string)Session["userType"];
pass = (string)Session["password"];
if (userType == "Participant")
{
Response.Redirect("/srls/StudentUser");
}
else if (userType == "Coordinator")
{
Response.Redirect("/srls/CoordinatorUser");
}
else if (userType == "Instructor")
{
Response.Redirect("/srls/InstructorUser");
}
}
}
catch (Exception exc) //Module failed to load
{
Exceptions.ProcessModuleLoadException(this, exc);
}
}
protected void btnlogin_Click(object sender, System.EventArgs e)
{
char activation;
if (Request.QueryString["tokenNum"] != null)
{
using (OdbcConnection dbConnection = new OdbcConnection(srlsConnStr))
{
dbConnection.Open();
{
OdbcCommand dbCommand = new OdbcCommand();
dbCommand.Connection = dbConnection;
dbCommand.CommandText = @"SELECT tokenNum FROM srlslogin WHERE user_email_pk = ?";
dbCommand.Parameters.AddWithValue("@user_email_pk", txtUsername.Text);
dbCommand.ExecuteNonQuery();
OdbcDataReader dataReader = dbCommand.ExecuteReader();
while (dataReader.Read())
{
if (token == dataReader["tokenNum"].ToString())
{
updateActivationStatus(txtUsername.Text);
LoginWithPasswordHashFunction();
}
else
{
test.Text = "You are not authorized to login! Please activate your account following the activation link sent to your email " + txtUsername.Text + " !";
}
}
}
dbConnection.Close();
}
}
else if (Request.QueryString["tokenNum"] == null)
{
using (OdbcConnection dbConnection = new OdbcConnection(srlsConnStr))
{
dbConnection.Open();
{
OdbcCommand dbCommand1 = new OdbcCommand();
dbCommand1.Connection = dbConnection;
dbCommand1.CommandText = @"SELECT * FROM srlslogin WHERE user_email_pk = ?;";
dbCommand1.Parameters.AddWithValue("@user_email_pk", txtUsername.Text);
dbCommand1.ExecuteNonQuery();
OdbcDataReader dataReader1 = dbCommand1.ExecuteReader();
if (dataReader1.Read())
{
activation = Convert.ToChar(dataReader1["activation_status"]);
if (activation == 'Y')
{
activation status, activation == Y";
LoginWithPasswordHashFunction();
}
else
{
lblMessage.Text = "Please activate your account following the Activation link emailed to you at <i>" + txtUsername.Text + "</i> to Continue!";
}
}
else
{
lblMessage.Text = "Invalid Username or Password";
}
dataReader1.Close();
}
dbConnection.Close();
}
}
}
private void LoginWithPasswordHashFunction()
{
List<string> salthashList = null;
List<string> usernameList = null;
try
{
using (OdbcConnection dbConnection = new OdbcConnection(srlsConnStr))
{
dbConnection.Open();
{
OdbcCommand dbCommand = new OdbcCommand();
dbCommand.Connection = dbConnection;
dbCommand.CommandText = @"SELECT slowhashsalt, user_email_pk FROM srlslogin WHERE user_email_pk = ?;";
dbCommand.Parameters.AddWithValue(@"user_email_pk", txtUsername.Text);
OdbcDataReader dataReader = dbCommand.ExecuteReader();
while (dataReader.HasRows && dataReader.Read())
{
if (salthashList == null)
{
salthashList = new List<string>();
usernameList = new List<string>();
}
string saltHashes = dataReader.GetString(dataReader.GetOrdinal("slowhashsalt"));
salthashList.Add(saltHashes);
string userInfo = dataReader.GetString(dataReader.GetOrdinal("user_email_pk"));
usernameList.Add(userInfo);
}
dataReader.Close();
if (salthashList != null)
{
for (int i = 0; i < salthashList.Count; i++)
{
bool validUser = PasswordHash.ValidatePassword(txtPassword.Text, salthashList[i]);
if (validUser == true)
{
Session["user_email_pk"] = usernameList[i];
OdbcCommand dbCommand1 = new OdbcCommand();
dbCommand1.Connection = dbConnection;
dbCommand1.CommandText = @"SELECT user_status FROM srlslogin WHERE user_email_pk = ?;";
dbCommand1.Parameters.AddWithValue("@user_email_pk", txtUsername.Text);
dbCommand1.ExecuteNonQuery();
OdbcDataReader dataReader1 = dbCommand1.ExecuteReader();
while (dataReader1.Read())
{
user_status = dataReader1["user_status"].ToString();
Session["userType"] = user_status;
}
Response.BufferOutput = true;
if (user_status == "Participant")
{
Response.Redirect("/srls/StudentUser", false);
}
else if (user_status == "Coordinator")
{
Response.Redirect("/srls/CoordinatorUser", false);
}
else if (user_status == "Instructor")
{
Response.Redirect("/srls/InstructorUser", false);
}
dataReader1.Close();
Response.Redirect(/srls/StudentUser) - Goes to Login Page";
}
else
{
lblMessage.Text = "Invalid Username or Password! Please Try Again!";
}
}
}
}
dbConnection.Close();
}
}
catch (Exception ex)
{
}
你熟悉'PostBacks'需要例如在'OnSession_Start'存儲例如聲明一個變量這樣例如 'HttpContext.Current.Session [「isValidUser」 ] = false;'然後在你的登錄或驗證部分的代碼中設置session變量，如果有效用戶爲真 'HttpContext.Current.Session [「isValidUser」] = true;'因爲一個按鈕導致一個PostBack你需要擁有一些'if（！IsPostBack）'在Page_Load事件中檢查你的登錄。 – MethodMan
感謝@MethodMan的建議，我會看看它，看看它是如何工作的。 – skaur