/// <summary>
/// Protect and url-encode the specified token secret.
/// </summary>
/// <param name="token">The token to be used as a key.</param>
/// <param name="tokenSecret">The token secret to be protected</param>
/// <returns>The encrypted and protected string.</returns>
protected static string ProtectAndEncodeToken(string token, string tokenSecret)
{
byte[] cookieBytes = Encoding.UTF8.GetBytes(tokenSecret);
var secretBytes = MachineKeyUtil.Protect(cookieBytes, TokenCookieKey, "Token:" + token);
return(HttpServerUtility.UrlTokenEncode(secretBytes));
}
/// <summary>
/// Gets the token secret from the specified token.
/// </summary>
/// <param name="token">The token.</param>
/// <returns>
/// The token's secret
/// </returns>
public string GetTokenSecret(string token)
{
HttpCookie cookie = this.Context.Request.Cookies[TokenCookieKey];
if (cookie == null || string.IsNullOrEmpty(cookie.Values[token]))
{
return(null);
}
byte[] cookieBytes = HttpServerUtility.UrlTokenDecode(cookie.Values[token]);
byte[] clearBytes = MachineKeyUtil.Unprotect(cookieBytes, TokenCookieKey, "Token:" + token);
string secret = Encoding.UTF8.GetString(clearBytes);
return(secret);
}
/// <summary>
/// Stores the request token together with its secret.
/// </summary>
/// <param name="requestToken">The request token.</param>
/// <param name="requestTokenSecret">The request token secret.</param>
public void StoreRequestToken(string requestToken, string requestTokenSecret)
{
var cookie = new HttpCookie(TokenCookieKey)
{
HttpOnly = true
};
if (FormsAuthentication.RequireSSL)
{
cookie.Secure = true;
}
byte[] cookieBytes = Encoding.UTF8.GetBytes(requestTokenSecret);
var secretBytes = MachineKeyUtil.Protect(cookieBytes, TokenCookieKey, "Token:" + requestToken);
cookie.Values[requestToken] = HttpServerUtility.UrlTokenEncode(secretBytes);
this.Context.Response.Cookies.Set(cookie);
}
/// <summary>
/// Url-decode and unprotect the specified encrypted token string.
/// </summary>
/// <param name="token">The token to be used as a key.</param>
/// <param name="encryptedToken">The encrypted token to be decrypted</param>
/// <returns>The original token secret</returns>
protected static string DecodeAndUnprotectToken(string token, string encryptedToken)
{
byte[] cookieBytes = HttpServerUtility.UrlTokenDecode(encryptedToken);
byte[] clearBytes = MachineKeyUtil.Unprotect(cookieBytes, TokenCookieKey, "Token:" + token);
return(Encoding.UTF8.GetString(clearBytes));
}
