SHA1

[M Ambigai]

Hello sir, I have to encrypt my password.I used the following statement. string pswd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPswd.Text, SHA1 ); Error message is "SHA1 is a type not a variable". How can i do?

[Kelly Herald]

The second parameter is expecting a string not an enum. Try this:

string pswd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPswd.Text, **"SHA1"** );

Kelly Herald Software Developer

[M Ambigai]

Sir, How can i decode it again to login?

[Kelly Herald]

A hash is one way. It cannot be decrypted. However, you can just compare the newly generated hash with the one stored like below.

string storedpswd = ... // retrieve stored password from your storage location
string newpswd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPswd.Text, "SHA1" );
if (newpswd == storedpswd)
{
// passwords match
}else
{
// passwords do not match
}

Kelly Herald Software Developer

[M Ambigai]

Sir, To encrypt and also decrypt what algorithm can be used

[Kelly Herald]

You can use TripleDES, Rijndael, or any of the non-hashing algorithms located in the System.Security.Cryptography namespace. Below is a link to MSDN's library for the TripleDES class and it has a complete example of how to encrypt and decrypt data. The other algorithms can also be found in the MSDN library. TripleDESCryptoServiceProvider Class[^]

Kelly Herald Software Developer