/// <summary>
/// Decodes a encoded key value pair in base64 and returns it as a
/// username and password.
/// Sample hash: "dXNlcm5hbWU6cGFzcw=="
/// Decodaed: "username:pass"
/// The key will be "username"
/// The value will be "pass"
/// </summary>
/// <param name="hash">A base 64 hash</param>
/// <returns>Key value pair the key is the user, the value is the pass</returns>
public static KeyValuePair<string, string> DecodeHash(string hash)
{
InventoryDatabaseEntities db = new InventoryDatabaseEntities();
byte[] data = Convert.FromBase64String(hash);
string decoded = Encoding.UTF8.GetString(data);
string[] userPass = decoded.Split(':');
return new KeyValuePair<string, string>(userPass[0], userPass[1]);
}
/// <summary>
/// Checks with the backend to ensure that the user exists.
/// </summary>
/// <param name="login">Key value pair, the key is the username, the value is the password</param>
/// <returns>True or false based on if auth was a success</returns>
public static bool Authenticate(KeyValuePair<string, string> login)
{
InventoryDatabaseEntities db = new InventoryDatabaseEntities();
string username = login.Key;
string pass = login.Value;
Models.User user = db.Users.Where(u => u.userName == username).First();
if (Auth.verifyPassword(pass, user.password))
{
return true;
}
return false;
}
/// <summary>
/// Authenticate via a token.
/// </summary>
/// <param name="token">The token to authenticate.</param>
/// <returns>authentication status success/failure</returns>
public static bool Authenticate(string token)
{
InventoryDatabaseEntities db = new InventoryDatabaseEntities();
byte[] data = Convert.FromBase64String(token);
string decoded = Encoding.UTF8.GetString(data);
string[] userPass = decoded.Split(':');
string username = userPass[0];
Models.User user = db.Users.Where(u => u.userName == username).First();
Debug.WriteLine(username + " : " + userPass[1]);
if (user.authDate.HasValue && (DateTime.Now - user.authDate.Value).TotalMinutes < 30)
{
if (userPass[1] == user.authToken)
{
user.authDate = DateTime.Now;
db.SaveChanges();
return true;
}
}
return false;
}
public static string generateToken(string username)
{
InventoryDatabaseEntities db = new InventoryDatabaseEntities();
Models.User user = db.Users.Where(u => u.userName == username).First();
string token = Convert.ToBase64String(Guid.NewGuid().ToByteArray());
user.authToken = token;
user.authDate = DateTime.Now;
db.SaveChanges();
return token;
}
