public void TestCreateHashSha512()
{
CryptoHelper crypto = new CryptoHelper();
string pwAsUserEnteredString = "The Sun Did Not Shine";
byte[] result = crypto.CreateHashSha512(pwAsUserEnteredString);
string resultstr = BitConverter.ToString(result);
Assert.AreEqual("1", "1");
}
public void TestIsPasswordCorrectForTrue()
{
CryptoHelper crypto = new CryptoHelper();
string pw = "The Sun Did Not Shine";
string pwAsUserEnteredString = "The Sun Did Not Shine";
byte[] pwAsByteArrayFromDB = crypto.CreateHashSha512(pw);
bool pwcorrect = crypto.IsPasswordCorrect(pwAsUserEnteredString, pwAsByteArrayFromDB);
Assert.IsTrue(pwcorrect);
}
public void TestIsPasswordCorrectForFalse()
{
CryptoHelper crypto = new CryptoHelper();
string pw = "The Sun Did Not Shine";
string pwAsUserEnteredString = "It Was Too Wet To Play";
//string pwAsUserEnteredString = "the sun did not shine";
byte[] pwAsByteArrayFromDB = crypto.CreateHashSha512(pw);
bool pwcorrect = crypto.IsPasswordCorrect(pwAsUserEnteredString, pwAsByteArrayFromDB);
Assert.IsFalse(pwcorrect);
}
public static string GetSecureCookieValue(string cookieName)
{
if (HttpContext.Current == null) return String.Empty;
if (String.IsNullOrEmpty(cookieName)) return String.Empty;
HttpCookie cookie = HttpContext.Current.Request.Cookies.Get(cookieName);
if (cookie == null) return string.Empty;
CryptoHelper cryptoHelper = new CryptoHelper();
string value = DecryptAndVerifyCookie(
cryptoHelper,
cookie,
HttpContext.Current.Request.ServerVariables);
return value.ToString();
}
public static string DecryptAndVerifyCookie(
CryptoHelper cryptoHelper,
HttpCookie cookie,
NameValueCollection serverVariables)
{
if (cookie == null) return null;
string[] values;
if (!cryptoHelper.DecryptAndVerifyData(cookie.Value, out values))
return null;
if (values.Length == 3) // 3 values, has an expiry date
{
DateTime expireDate = DateTime.Parse(values[2]);
if (expireDate < DateTime.Now)
return null;
}
if (values[1] != serverVariables["REMOTE_ADDR"])
return null;
return values[0];
}
public static void SignAndSecureCookie(
CryptoHelper cryptoHelper,
HttpCookie cookie,
NameValueCollection
serverVariables)
{
if (cookie.HasKeys)
throw (new Exception("Does not support cookies with sub keys"));
if (cookie.Expires != DateTime.MinValue) // has an expiry date
{
cookie.Value = cryptoHelper.SignAndSecureData(new string[]
{
cookie.Value,
serverVariables["REMOTE_ADDR"],
cookie.Expires.ToString()});
}
else
{
cookie.Value = cryptoHelper.SignAndSecureData(
new string[] { cookie.Value, serverVariables["REMOTE_ADDR"] });
}
}
public static void SetSecureCookie(String cookieName, String cookieValue)
{
if (String.IsNullOrEmpty(cookieName) || String.IsNullOrEmpty(cookieValue)) return;
if (HttpContext.Current == null) return;
HttpCookie cookie = new HttpCookie(cookieName, cookieValue);
cookie.HttpOnly = true;
//cookie.Expires = DateTime.Now.AddYears(1);
CryptoHelper cryptoHelper = new CryptoHelper();
SignAndSecureCookie(
cryptoHelper,
cookie,
HttpContext.Current.Request.ServerVariables);
HttpContext.Current.Response.Cookies.Add(cookie);
}
/// <summary>
/// Computes and returns the 16-byte MD5 hash of the GUID.
/// </summary>
/// <param name="guid">The GUID.</param>
/// <returns>The 16-byte hash.</returns>
public static byte[] ToMd5Bytes(this Guid guid)
{
return(CryptoHelper.ComputeMD5Bytes(guid.ToByteArray()));
}
