protected void Application_BeginRequest(Object sender, EventArgs e)
{
#region XSS, SQL Injection 방지
string originalPath = HttpContext.Current.Request.Path;
string queryString = string.Empty;
if (HttpContext.Current.Request.QueryString.Count > 0)
{
queryString = HttpContext.Current.Request.QueryString.ToString();
// Injection 문자 존재 여부
bool hasInjectionCharacters;
// Query String 에서 XSS, SQL Injection 공격에 사용되는 Single quotation, Dobule quotation, Semi colon 제거 / Less Than, Greater Than 치환
queryString = HelperSecurity.WithoutInjectionCharacters(queryString, out hasInjectionCharacters);
// Injection 문자가 존재할 경우, 메인 페이지로 Redirect
if (hasInjectionCharacters)
{
Context.RewritePath("/");
}
else
{
Context.RewritePath(originalPath + "?" + queryString);
}
}
#endregion / XSS, SQL Injection 방지
}
public async Task ReceiveAsync(AuthenticationTokenReceiveContext context)
{
var allowedOrigin = context.OwinContext.Get <string>("as:clientAllowedOrigin");
context.OwinContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { allowedOrigin });
string hashedTokenId = HelperSecurity.GetHash(context.Token);
//using (AuthRepository _repo = new AuthRepository())
using (var dbcontext = new ApplicationDbContext())
{
var repo = new UserRepository(dbcontext);
var refreshToken = await repo.FindRefreshToken(hashedTokenId);
if (refreshToken != null)
{
//Get protectedTicket from refreshToken class
context.DeserializeTicket(refreshToken.ProtectedTicket);
var result = await repo.RemoveRefreshToken(hashedTokenId);
}
}
}
public async Task CreateAsync(AuthenticationTokenCreateContext context)
{
var clientid = context.Ticket.Properties.Dictionary["as:client_id"];
if (string.IsNullOrEmpty(clientid))
{
return;
}
var refreshTokenId = Guid.NewGuid().ToString("n");
using (var dbcontext = new ApplicationDbContext())
{
var repo = new UserRepository(dbcontext);
var refreshTokenLifeTime = context.OwinContext.Get <string>("as:clientRefreshTokenLifeTime");
var token = new RefreshToken()
{
Id = HelperSecurity.GetHash(refreshTokenId),
ClientId = clientid,
Subject = context.Ticket.Identity.Name,
IssuedUtc = DateTime.UtcNow,
ExpiresUtc = DateTime.UtcNow.AddMinutes(Convert.ToDouble(refreshTokenLifeTime))
};
context.Ticket.Properties.IssuedUtc = token.IssuedUtc;
context.Ticket.Properties.ExpiresUtc = token.ExpiresUtc;
token.ProtectedTicket = context.SerializeTicket();
var result = await repo.AddRefreshToken(token);
if (result)
{
context.SetToken(refreshTokenId);
}
}
}
