/// <summary>
/// Asynchronously generates a password using the specified PasswordRecipe.
/// </summary>
/// <param name="recipe">A description of what constitutes a valid password to generate.</param>
/// <returns>A Task responsible for generating the desired password.</returns>
public Task <string> Generate(PasswordRecipe recipe)
{
if (recipe == null)
{
throw new ArgumentNullException(nameof(recipe));
}
// Run the generation asynchronously because it could be expensive.
return(Task.Run(
() =>
{
string newPassword = string.Empty;
// Short circuit if there are no permissible characters left.
if (recipe.AvailableCharacters.Count == 0)
{
return newPassword;
}
// Generate the password from the allowed chars (guaranteed to be good, now)
for (int i = 0; i < recipe.Length; i++)
{
newPassword += recipe.AvailableCharacters[this.rngProvider.GetInt(recipe.AvailableCharacters.Count)];
}
return newPassword;
}
));
}
public PasswordRecipe GetCurrentRecipe()
{
PasswordRecipe recipe = new PasswordRecipe(Length);
if (UseLowerCase)
{
recipe.Include("abcdefghijklmnopqrstuvwxyz");
}
if (UseUpperCase)
{
recipe.Include("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
if (UseDigits)
{
recipe.Include("0123456789");
}
if (UseSpace)
{
recipe.Include(' ');
}
if (UseSymbols)
{
recipe.Include("!@#$%^&*/\\'\"`");
}
if (UseBrackets)
{
recipe.Include("<>{}[]()");
}
if (UseMinus)
{
recipe.Include('-');
}
if (UseUnderscore)
{
recipe.Include('_');
}
// Handle the final two lists of exceptions
recipe.Include(AllowList);
recipe.Exclude(ExcludeList);
return(recipe);
}
