public string GenerateLicenceKey(int userId)
{
var keyGenerator = new PkvLicenceKeyGenerator();
// The KeyByteSet objects are the secret byte groups that are built in
// to the licence key. On verification of the licence
// key, we will test against a subset of these KeyByteSet objects.
// Important: The full set of KeyByteSet objects should not be available
// in any publicly distributed code or binaries. Nor should
// the AppSoftware.LicenceEngine.KeyGenerator.dll binary file.
var keyBytes = new [] {
new KeyByteSet(1, 254, 122, 96),
new KeyByteSet(2, 54, 124, 222),
new KeyByteSet(3, 119, 142, 132),
new KeyByteSet(4, 128, 122, 10),
new KeyByteSet(5, 165, 15, 132),
new KeyByteSet(6, 128, 175, 213),
new KeyByteSet(7, 7, 244, 132 ),
new KeyByteSet(8, 128, 122, 251)
};
string key = keyGenerator.MakeKey(userId, keyBytes);
// The key can now be presented to the user.
return key;
}
public void Test_pkv_licence_key_generation_and_verification()
{
var pkvLicenceKey = new PkvLicenceKeyGenerator();
var pkvKeyCheck = new PkvKeyCheck();
string key = String.Empty;
KeyByteSet[] keyByteSets = new []
{
new KeyByteSet(1, 58, 6, 97),
new KeyByteSet(2, 96, 254, 23),
new KeyByteSet(3, 11, 185, 69),
new KeyByteSet(4, 2, 93, 41),
new KeyByteSet(5, 62, 4, 234),
new KeyByteSet(6, 200, 56, 49),
new KeyByteSet(7, 89, 45,142),
new KeyByteSet(8, 6, 88, 32)
};
// Change these to a random key byte set from the above array to test key verification with
KeyByteSet kbs1 = keyByteSets[3];
KeyByteSet kbs2 = keyByteSets[7];
KeyByteSet kbs3 = keyByteSets[4];
// The check project also uses a class called KeyByteSet, but with
// separate name spacing to achieve single self contained dll
KeyByteSet keyByteSet1 = new KeyByteSet(kbs1.KeyByteNo, kbs1.KeyByteA, kbs1.KeyByteB, kbs1.KeyByteC); // Change no to test others
KeyByteSet keyByteSet2 = new KeyByteSet(kbs2.KeyByteNo, kbs2.KeyByteA, kbs2.KeyByteB, kbs2.KeyByteC);
KeyByteSet keyByteSet3 = new KeyByteSet(kbs3.KeyByteNo, kbs3.KeyByteA, kbs3.KeyByteB, kbs3.KeyByteC);
for (int i = 0; i < 10000; i++)
{
int seed = new Random().Next(0, Int32.MaxValue);
key = pkvLicenceKey.MakeKey(seed, keyByteSets);
// Check that check sum validation passes
Assert.True(pkvKeyCheck.CheckKeyChecksum(key, keyByteSets.Length));
// Check using full check method
Assert.True(pkvKeyCheck.CheckKey(
key,
new[] { keyByteSet1, keyByteSet2, keyByteSet3 },
keyByteSets.Length,
null
) == PkvLicenceKeyResult.KeyGood, "Failed on iteration " + i
);
// Check that erroneous check sum validation fails
Assert.False(pkvKeyCheck.CheckKeyChecksum(key.Remove(23, 1) + "A", keyByteSets.Length)); // Change key by replacing 17th char
}
// Check a few random inputs
Assert.False(pkvKeyCheck.CheckKey("adcsadrewf",
new[] { keyByteSet1, keyByteSet2 },
keyByteSets.Length,
null) == PkvLicenceKeyResult.KeyGood
);
Assert.False(pkvKeyCheck.CheckKey("",
new[] { keyByteSet1, keyByteSet2 },
keyByteSets.Length,
null) == PkvLicenceKeyResult.KeyGood
);
Assert.False(pkvKeyCheck.CheckKey("123",
new[] { keyByteSet1, keyByteSet2 },
keyByteSets.Length,
null) == PkvLicenceKeyResult.KeyGood
);
Assert.False(pkvKeyCheck.CheckKey("*()",
new[] { keyByteSet1, keyByteSet2 },
keyByteSets.Length,
null) == PkvLicenceKeyResult.KeyGood
);
Assert.False(pkvKeyCheck.CheckKey("dasdasdasgdjwqidqiwd21887127eqwdaishxckjsabcxjkabskdcbq2e81y12e8712",
new[] { keyByteSet1, keyByteSet2 },
keyByteSets.Length,
null) == PkvLicenceKeyResult.KeyGood
);
}
public void Test_PKV_licence_key_generation_and_verification_with_random_key_bytes_key_byte_qty_and_verification_key_byte_selection()
{
var pkvLicenceKey = new PkvLicenceKeyGenerator();
var pkvKeyCheck = new PkvKeyCheck();
for (int i = 0; i < 10000; i++)
{
int randomKeyByteSetsLength = new Random().Next(2, 400);
KeyByteSet[] keyByteSets = new KeyByteSet[randomKeyByteSetsLength];
for (int j = 0; j < randomKeyByteSetsLength; j++)
{
var random = new Random();
var kbs = new KeyByteSet
(
j + 1,
(byte)random.Next(0, 256),
(byte)random.Next(0, 256),
(byte)random.Next(0, 256)
);
keyByteSets[j] = kbs;
}
// Select a random key byte set to test key verification with
KeyByteSet kbs1 = keyByteSets[new Random().Next(0, randomKeyByteSetsLength)];
KeyByteSet kbs2 = keyByteSets[new Random().Next(0, randomKeyByteSetsLength)];
// The check project also uses a class called KeyByteSet, but with
// separate name spacing to achieve single self contained dll
KeyByteSet keyByteSet1 = new KeyByteSet(kbs1.KeyByteNo, kbs1.KeyByteA, kbs1.KeyByteB, kbs1.KeyByteC); // Change no to test others
KeyByteSet keyByteSet2 = new KeyByteSet(kbs2.KeyByteNo, kbs2.KeyByteA, kbs2.KeyByteB, kbs2.KeyByteC);
int seed = new Random().Next(0, Int32.MaxValue);
string key = pkvLicenceKey.MakeKey(seed, keyByteSets);
// Check that check sum validation passes
Assert.True(pkvKeyCheck.CheckKeyChecksum(key, keyByteSets.Length));
// Check using full check method
Assert.True(pkvKeyCheck.CheckKey(
key,
new[] { keyByteSet1, keyByteSet2 },
keyByteSets.Length,
null
) == PkvLicenceKeyResult.KeyGood, "Failed on iteration " + i
);
}
}