/// <summary>
/// Writes protectes the workbook with a password.
/// EPPlus uses SHA-512 as hash algorithm with a spin count of 100000.
/// </summary>
/// <param name="userName">The name of the person enforcing the write protection</param>
/// <param name="password">The password. Setting the password to null or empty will remove the read-only mode.</param>
public void SetReadOnly(string userName, string password)
{
UserName = userName;
if (string.IsNullOrEmpty(password?.Trim()))
{
RemovePasswordAttributes();
return;
}
HashAlgorithm = eHashAlgorithm.SHA512;
var s = new byte[16];
var rnd = RandomNumberGenerator.Create();
rnd.GetBytes(s);
SaltValue = s;
SpinCount = 100000;
HashValue = EncryptedPackageHandler.GetPasswordHashSpinAppending(SHA512.Create(), SaltValue, password, SpinCount, 64);
}