public IAccessToken Create(int userId)
{
// create the token
var token = container.GetInstance <IAccessToken>();
var passwordHash = container.GetInstance <IPasswordHash>();
string tokenHash;
string encryptedUserId;
byte[] userIdSalt;
DateTime issuedAt, refreshed;
// check whether there is a token existing for this userId
bool tokenExists = tokenStorage.VerifyTokenExistence(userId, out tokenHash, out issuedAt, out refreshed);
if (tokenExists)
{
if (dateHelper.IsWithinTimeOutLimit(refreshed))
{
// token is still valid, refresh the token to extend the timeout
if (!tokenStorage.RefreshToken(userId, tokenHash, dateHelper.Now))
{
throw new Exception("Failed to refresh existing the token");
}
token.IssuedAt = issuedAt;
token.Token = tokenHash;
encryptedUserId = null;
issuedAt = new DateTime();
refreshed = new DateTime();
return(token);
}
}
// Create the token identifier
Guid tokenId = openGuid.New();
var hashedToken = passwordHash.CreateHash(tokenId.ToString());
userIdSalt = encrypter.GetSalt();
encryptedUserId = encrypter.Encrypt(userId.ToString(), userIdSalt);
issuedAt = dateHelper.Now;
//store the hashInfo
if (!tokenStorage.StoreToken(userId, hashedToken, encryptedUserId, userIdSalt, issuedAt))
{
throw new Exception("Failed to store the session token");
}
// set the token for the user
token.Token = hashedToken.Hash;
token.IssuedAt = issuedAt;
//reset all information
hashedToken.Dispose();
userIdSalt = null;
encryptedUserId = null;
passwordHash.Dispose();
passwordHash = null;
return(token);
}