public void Checksum16SmallDataSet()
{
int checksum = provider.Checksum16(checksumTest.Replace("-", ""));
string hex = checksum.ToString("X");
Assert.AreEqual(checksumNumber, checksum);
Assert.AreEqual(checksumHash, hex);
}
public string GenerateLicenseKey(string rsaXmlString, LicenseBase scutexLicense, LicenseGenerationOptions generationOptions)
{
// Init all required variables for the process.
Dictionary <int, LicensePlaceholder> placeholerLocations;
List <LicensePlaceholder> licensePlaceholders = CreateLicensePlaceholders(scutexLicense, generationOptions);
string licenseKey;
char[] licenseKeyArray;
// Setup the license key to work on
licenseKey = licenseKeyTemplate.Replace("-", "");
// Locate all the placeholder tokens in the license template
placeholerLocations = FindAllPlaceholdersInTemplate(licenseKey, licensePlaceholders);
// Verify that all the registered placeholders were located in the template.
if (placeholerLocations.Count != licensePlaceholders.Count)
{
throw new Exception(string.Format(Resources.ErrorMsg_PlaceholderCount,
licensePlaceholders.Count, placeholerLocations.Count));
}
// Change all non-checksum placeholders to their actual values in the key
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
string token = "";
for (int i = 0; i < p.Value.Length; i++)
{
token = token + p.Value.Token;
}
licenseKey = licenseKey.Replace(token, p.Value.Value);
}
}
// Compute and change the random license key placeholders
licenseKeyArray = licenseKey.ToCharArray();
for (int i = 0; i < licenseKeyArray.Length; i++)
{
if (licenseKeyArray[i] == char.Parse("x"))
{
licenseKeyArray[i] = GetRandomCharacter();
}
}
licenseKey = new string(licenseKeyArray);
// Obfuscate key license placeholders that are not checksums
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
if (p.Value.Type == PlaceholderTypes.Number)
{
//Console.WriteLine(p.Value.Token);
//Console.WriteLine("-----------------");
licenseKeyArray = licenseKey.ToCharArray();
for (int i = 0; i < p.Value.Length; i++)
{
char previousChar = licenseKeyArray[(p.Key) - 1];
int data = int.Parse(licenseKeyArray[p.Key + i].ToString(), NumberStyles.HexNumber);
char obfKey = KeyIntegerValueObfuscator(previousChar, data, p.Key + i);
licenseKeyArray[p.Key + i] = obfKey;
}
licenseKey = new string(licenseKeyArray);
}
else if (p.Value.Type == PlaceholderTypes.String)
{
licenseKeyArray = licenseKey.ToCharArray();
for (int i = 0; i < p.Value.Length; i++)
{
char previousChar = licenseKeyArray[(p.Key) - 1];
int modData = CharacterMap.ReverseMap[licenseKeyArray[p.Key + i]];
//Console.WriteLine(string.Format("Char: {0}", licenseKeyArray[p.Key + i]));
char obfKey = KeyIntegerValueObfuscator(previousChar, modData, p.Key + i);
licenseKeyArray[p.Key + i] = obfKey;
}
licenseKey = new string(licenseKeyArray);
}
}
}
// Now compute and change all the checksum placeholders in the key
foreach (var p in placeholerLocations)
{
if (p.Value.IsChecksum)
{
string token = "";
for (int i = 0; i < p.Value.Length; i++)
{
token = token + p.Value.Token;
}
string hash = hashingProvider.Checksum16(licenseKey.Substring(0, p.Key)).ToString("X");
hash = hash.PadLeft(4, char.Parse("0"));
licenseKey = licenseKey.Replace(token, hash);
}
}
// Insert the seperators
List <int> seperatorLocations = FindAllSeperatorsInTemplate(licenseKeyTemplate);
string finalKey = licenseKey;
if (seperatorLocations.Count > 0)
{
int remaining = seperatorLocations.Count - 1;
for (int i = 0; i < seperatorLocations.Count; i++)
{
finalKey = finalKey.Insert(seperatorLocations[i] - remaining, "-");
remaining--;
}
}
return(finalKey);
}
internal List <LicensePlaceholder> CreateLicensePlaceholders(LicenseBase scutexLicense, LicenseGenerationOptions generationOptions)
{
List <LicensePlaceholder> Placeholders = new List <LicensePlaceholder>();
if (generationOptions != null)
{
Placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("k"),
Type = PlaceholderTypes.Number,
Value = ((int)generationOptions.LicenseKeyType).ToString(),
IsChecksum = false,
ValidationType = ValidationTypes.LicenseKeyType
});
}
else
{
Placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("k"),
Type = PlaceholderTypes.Number,
Value = "0",
IsChecksum = false,
ValidationType = ValidationTypes.LicenseKeyType
});
}
Placeholders.Add(new LicensePlaceholder
{
Length = 2,
Token = Char.Parse("a"),
Type = PlaceholderTypes.Number,
Value = scutexLicense.Product.GetFormattedProductId(2),
IsChecksum = false,
ValidationType = ValidationTypes.None
});
Placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("c"),
Type = PlaceholderTypes.Number,
Value = "",
IsChecksum = true,
ValidationType = ValidationTypes.None
});
string licProdChecksum = hashingProvider.Checksum16(scutexLicense.GetLicenseProductIdentifier()).ToString("X");
if (licProdChecksum.Length < 4)
{
licProdChecksum = licProdChecksum.PadLeft(4, char.Parse("0"));
}
Placeholders.Add(new LicensePlaceholder
{
Length = 4,
Token = Char.Parse("p"),
Type = PlaceholderTypes.Number,
Value = licProdChecksum,
IsChecksum = false,
ValidationType = ValidationTypes.None
});
return(Placeholders);
}