/// <summary>
/// Check if a password has been pwned
/// </summary>
/// <param name="password">The password to check</param>
/// <returns>Number of instances the password has been pwned</returns>
public async Task <int> CheckPassword(string password)
{
int result = 0;
var passwordHashBytes = PasswordHasher.HashPassword(password);
var passwordHash = PasswordHasher.ConvertHashToString(passwordHashBytes);
var passwordHashPrefix = passwordHash.Substring(0, 5);
var response = await CheckIfPwned(passwordHashPrefix).ConfigureAwait(false);
if (response.Any())
{
var passwordHashSuffix = passwordHash.Substring(6);
var breaches = response
.Split(new string[] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries)
.Where(r => r.ToLowerInvariant().Contains(passwordHashSuffix.ToLowerInvariant()))
.ToList();
breaches.ForEach(fe =>
{
var breach = fe.Split(':');
result += int.Parse(breach[1]);
});
}
return(result);
}
