public void WhenCalled_ThenReturnsRandomInt32()
{
using (var rng = new RNGCryptoServiceProvider())
{
var result1 = rng.GetInt32();
var result2 = rng.GetInt32();
Assert.That(result1, Is.Not.EqualTo(result2));
}
}
private ValueTuple <byte[], byte[]> Random()
{
var range = RNGCryptoServiceProvider.GetInt32(128, Length);
byte[] r1 = new byte[range];
byte[] r2 = new byte[Length - range];
RNGCryptoServiceProvider.Fill(r1);
RNGCryptoServiceProvider.Fill(r2);
return(ValueTuple.Create(r1, r2));
}
public void GenerateOneMillionInt32_WithRngProvider_ShouldBeUnique()
{
const int count = 10000;
var numbersHolder = new int[count];
using var rngProvider = new RNGCryptoServiceProvider();
for (var i = 0; i < count; i++)
{
numbersHolder[i] = rngProvider.GetInt32(9);
}
numbersHolder.Should().NotBeEmpty().And.NotContainNulls().And.HaveCount(count).And.OnlyHaveUniqueItems();
}
public static string GenerateRandomString(int size)
{
string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890~!@#$%^&*()_+{}|:\"<>?`-=[]\\;',./";
int length = chars.Length;
StringBuilder salt = new StringBuilder();
for (int i = 0; i < size; i++)
{
int choosen = RNGCryptoServiceProvider.GetInt32(length);
salt.Append(chars[choosen]);
}
return(salt.ToString());
}
protected internal int GetRandomInt32(int min, int max)
{
if (min > max)
{
throw new ArgumentOutOfRangeException(nameof(min), "Min was greater than max.");
}
if (min == max)
{
return(min);
}
int generatedValue = Math.Abs(_rng.GetInt32());
int diff = max - min + 1;
int mod = generatedValue % diff;
return(min + mod);
}
private string GenerateSalt()
{
int size = RNGCryptoServiceProvider.GetInt32(1, 21);
return(Utils.Utils.GenerateRandomString(size));
}