public List<string> GenerateLicenseKeys(string rsaXmlString, LicenseBase scutexLicense, LicenseGenerationOptions generationOptions, int count)
{
HashSet<string> licenses = new HashSet<string>();
int doupCount = 0;
while (licenses.Count < count)
{
string key = GenerateLicenseKey(rsaXmlString, scutexLicense, generationOptions);
if (licenses.Contains(key) == false)
{
licenses.Add(key);
//Debug.WriteLine(string.Format("{0} of {1} keys generated", licenses.Count, count));
}
else
{
doupCount++;
Debug.WriteLine(string.Format("Duplicate key was generated {0}", key));
}
}
if (doupCount > 0)
Debug.WriteLine(string.Format("{0} duplicate keys were generated at a {1}% chance", doupCount, doupCount * 100m / count));
return licenses.ToList();
}
public string GenerateLicenseKey(string rsaXmlString, LicenseBase scutexLicense,
LicenseGenerationOptions generationOptions)
{
if (generationOptions.GeneratorType == KeyGeneratorTypes.StaticSmall)
return keyGenerator.GenerateLicenseKey(rsaXmlString, scutexLicense, generationOptions);
else
return _largeKeyGenerator.GenerateLicenseKey(rsaXmlString, scutexLicense, generationOptions);
}
public RegisterResult Register(string licenseKey, LicenseBase scutexLicense, ScutexLicense license)
{
RegisterResult registerResult = new RegisterResult();
registerResult.ScutexLicense = license;
bool result = _licenseKeyService.ValidateLicenseKey(licenseKey, scutexLicense, true);
ClientLicense cl = null;
if (result)
{
KeyData keyData = _licenseKeyService.GetLicenseKeyData(licenseKey, scutexLicense, false);
if (keyData.LicenseKeyType != LicenseKeyTypes.Enterprise && keyData.LicenseKeyType != LicenseKeyTypes.HardwareLockLocal)
{
try
{
if (keyData.LicenseKeyType == LicenseKeyTypes.HardwareLock)
cl = _licenseActivationService.ActivateLicenseKey(licenseKey, null, false, (ClientLicense)scutexLicense, _hardwareFingerprintService.GetHardwareFingerprint(FingerprintTypes.Default));
else
cl = _licenseActivationService.ActivateLicenseKey(licenseKey, null, false, (ClientLicense)scutexLicense, null);
if (cl.IsLicensed && cl.IsActivated)
{
registerResult.Result = ProcessCodes.ActivationSuccess;
registerResult.ClientLicense = cl;
}
else
{
registerResult.Result = ProcessCodes.ActivationFailed;
}
}
catch
{
registerResult.Result = ProcessCodes.ActivationFailed;
}
}
else
{
cl = _licenseActivationService.ActivateLicenseKey(licenseKey, null, true, (ClientLicense)scutexLicense, null);
registerResult.Result = ProcessCodes.LicenseKeyNotActivated;
}
}
else
{
registerResult.Result = ProcessCodes.KeyInvalid;
}
if (cl != null)
{
license.IsLicensed = cl.IsLicensed;
license.IsActivated = cl.IsActivated;
license.ActivatedOn = cl.ActivatedOn;
}
return registerResult;
}
public ClientLicense(LicenseBase licenseBase)
{
base.UniqueId = licenseBase.UniqueId;
base.KeyPair = licenseBase.KeyPair;
base.KeyPair.PrivateKey = base.KeyPair.PublicKey; // We can't include the private license on the client side.
base.LicenseSets = licenseBase.LicenseSets;
base.Product = licenseBase.Product;
base.TrailNotificationSettings = licenseBase.TrailNotificationSettings;
base.TrialNotificationType = licenseBase.TrialNotificationType;
base.TrialSettings = licenseBase.TrialSettings;
base.KeyGeneratorType = licenseBase.KeyGeneratorType;
}
public ClientLicense(LicenseBase licenseBase)
{
base.UniqueId = licenseBase.UniqueId;
base.KeyPair = licenseBase.KeyPair;
base.KeyPair.PrivateKey = base.KeyPair.PublicKey; // We can't include the private license on the client side.
base.LicenseSets = licenseBase.LicenseSets;
base.Product = licenseBase.Product;
base.TrailNotificationSettings = licenseBase.TrailNotificationSettings;
base.TrialNotificationType = licenseBase.TrialNotificationType;
base.TrialSettings = licenseBase.TrialSettings;
base.KeyGeneratorType = licenseBase.KeyGeneratorType;
}
public bool ValidateLicenseKey(string licenseKey, LicenseBase scutexLicense, bool catchException)
{
if (catchException)
{
try
{
return keyGenerator.ValidateLicenseKey(licenseKey, scutexLicense);
}
catch (ScutexLicenseException)
{
return false;
}
}
return keyGenerator.ValidateLicenseKey(licenseKey, scutexLicense);
}
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>();
string payload = null;
if (generationOptions != null)
{
placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("k"),
Type = PlaceholderTypes.Number,
Value = ((int) generationOptions.LicenseKeyType).ToString("X"),
IsChecksum = false,
ValidationType = ValidationTypes.LicenseKeyType
});
placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("s"),
Type = PlaceholderTypes.Number,
Value = generationOptions.LicenseSetId.ToString(),
IsChecksum = false,
ValidationType = ValidationTypes.LicenseSet
});
if (generationOptions.LicenseKeyType == LicenseKeyTypes.HardwareLockLocal)
{
placeholders.Add(new LicensePlaceholder
{
Length = 4,
Token = Char.Parse("p"),
Type = PlaceholderTypes.String,
Value = hashingProvider.Checksum16(generationOptions.HardwareFingerprint).ToString("X"),
IsChecksum = false,
ValidationType = ValidationTypes.Fingerprint
});
}
else
{
payload = hashingProvider.Checksum16(scutexLicense.GetLicenseProductIdentifier()).ToString("X");
payload = payload.PadLeft(4, char.Parse("0"));
placeholders.Add(new LicensePlaceholder
{
Length = 4,
Token = Char.Parse("p"),
Type = PlaceholderTypes.String,
Value = payload,
IsChecksum = false,
ValidationType = ValidationTypes.ProductIdentifier
});
}
}
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 = 1,
Token = Char.Parse("s"),
Type = PlaceholderTypes.Number,
Value = "0",
IsChecksum = false,
ValidationType = ValidationTypes.LicenseSet
});
payload = hashingProvider.Checksum16(scutexLicense.GetLicenseProductIdentifier()).ToString("X");
payload = payload.PadLeft(4, char.Parse("0"));
placeholders.Add(new LicensePlaceholder
{
Length = 4,
Token = Char.Parse("p"),
Type = PlaceholderTypes.String,
Value = payload,
IsChecksum = false,
ValidationType = ValidationTypes.ProductIdentifier
});
}
placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("v"),
Type = PlaceholderTypes.Number,
Value = ((int)LicenseDataCheckTypes.Standard).ToString(),
IsChecksum = false
});
placeholders.Add(new LicensePlaceholder
{
Length = 2,
Token = Char.Parse("a"),
Type = PlaceholderTypes.Number,
Value = scutexLicense.Product.GetFormattedProductId(2),
IsChecksum = false,
ValidationType = ValidationTypes.Product
});
placeholders.Add(new LicensePlaceholder
{
Length = 4,
Token = Char.Parse("c"),
Type = PlaceholderTypes.Number,
Value = "",
IsChecksum = true,
ValidationType = ValidationTypes.None
});
placeholders.Add(new LicensePlaceholder
{
Length = 1,
Token = Char.Parse("l"),
Type = PlaceholderTypes.String,
Value = "F",
IsChecksum = false
});
//placeholders.Add(new LicensePlaceholder
//{
// Length = 1,
// Token = Char.Parse("s"),
// Type = PlaceholderTypes.String,
// Value = "0",
// IsChecksum = false
//});
return placeholders;
}
public bool ValidateLicenseKey(string licenseKey, LicenseBase scutexLicense)
{
// Init all required variables for the process.
Dictionary<int, LicensePlaceholder> placeholerLocations;
List<LicensePlaceholder> licensePlaceholders = CreateLicensePlaceholders(scutexLicense, null);
char[] licenseKeyArray;
string decodedLicenseKey = licenseKey.Replace("-", "");
// Locate all the placeholder tokens in the license template
placeholerLocations = FindAllPlaceholdersInTemplate(licenseKeyTemplate.Replace("-", ""), licensePlaceholders);
// STEP 1: Basic length checks
if (licenseKey.Length != licenseKeyTemplate.Length)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
if (decodedLicenseKey.Length != licenseKeyTemplate.Replace("-", "").Length)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
// STEP 2: Compute and verify all the checksum placeholders in the key
foreach (var p in placeholerLocations)
{
if (p.Value.IsChecksum)
{
string originalHash;
int originalHashValue;
int verifyHashValue;
try
{
originalHash = decodedLicenseKey.Substring(p.Key, p.Value.Length);
originalHashValue = int.Parse(originalHash, System.Globalization.NumberStyles.HexNumber);
verifyHashValue = hashingProvider.Checksum16(decodedLicenseKey.Substring(0, p.Key));
}
catch
{
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
if (originalHashValue != verifyHashValue)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
}
// STEP 3: DeObfuscate key license placeholders that are not checksums
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
licenseKeyArray = decodedLicenseKey.ToCharArray();
for (int i = 0; i < p.Value.Length; i++)
{
char previousChar = licenseKeyArray[(p.Key) - 1];
char deObfKey = KeyIntegerValueDeObfuscator(previousChar, licenseKeyArray[p.Key + i], p.Key + i);
licenseKeyArray[p.Key + i] = deObfKey;
}
decodedLicenseKey = new string(licenseKeyArray);
}
}
// STEP 4: Validate each non-checksum placeholder
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
switch (p.Value.ValidationType)
{
case ValidationTypes.LicenseKeyType:
int licenseKeyTypeValue = 0;
bool licenseKeyTypeValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out licenseKeyTypeValue);
// The LicenseKeyType value should be able to be converted to an int, else it is invalid
if (!licenseKeyTypeValueCheck)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
LicenseKeyTypeFlag typeFlag;
// It is possible that a LicenseKeyType has no supporting LicenseKeyTypeFlag (which means it was
// placeholded in the LicenseKeyType enum but is not operable). If this parse (cast) fails then
// there was a valid LicenseKeyType enum value but no valid LicenseKeyTypeFlag value.
try
{
int type = licenseKeyTypeValue;
if (((LicenseKeyTypes)licenseKeyTypeValue) == LicenseKeyTypes.HardwareLockLocal)
type = (int) LicenseKeyTypes.HardwareLock;
typeFlag = (LicenseKeyTypeFlag)Enum.Parse(typeof(LicenseKeyTypeFlag), ((LicenseKeyTypes)type).ToString(), true);
}
catch (Exception)
{
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
LicenseSet ls = null;
try
{
var licSetPH = placeholerLocations.Where(x => x.Value.ValidationType == ValidationTypes.LicenseSet).SingleOrDefault();
int licenseSetIdValue1 = int.Parse(decodedLicenseKey.Substring(licSetPH.Key, licSetPH.Value.Length));
Debug.WriteLine(string.Format("Decoded Key: {0}", decodedLicenseKey));
Debug.WriteLine(string.Format("LicenseSet Placeholder: {0}", licSetPH));
Debug.WriteLine(string.Format("LicenseSet Placeholder Key: {0}", licSetPH.Key));
Debug.WriteLine(string.Format("LicenseSet Placeholder Length: {0}", licSetPH.Value.Length));
Debug.WriteLine(string.Format("LicenseSetId Value: {0}", licenseSetIdValue1));
Debug.WriteLine(string.Format("LicenseSets: {0}", scutexLicense.LicenseSets.First().LicenseSetId));
ls = scutexLicense.LicenseSets.Where(x => x.LicenseSetId == licenseSetIdValue1).SingleOrDefault();
}
catch
{
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
Debug.WriteLine(string.Format("LicenseSet: {0}", ls));
if (ls == null)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
Debug.WriteLine(string.Format("LicenseSet Types: {0}", ls.SupportedLicenseTypes));
// If the LicenseSet does not support the key type supplied then throw an error
if (!ls.SupportedLicenseTypes.IsSet(typeFlag))
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
case ValidationTypes.LicenseSet:
int licenseSetIdValue = 0;
bool licenseSetIdValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), out licenseSetIdValue);
// The LicenseSetId value should be able to be converted to an int, else it is invalid
if (!licenseSetIdValueCheck)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
LicenseSet ls1 = null;
try
{
ls1 = scutexLicense.LicenseSets.Where(x => x.LicenseSetId == licenseSetIdValue).SingleOrDefault();
}
catch
{
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
if (ls1 == null)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
case ValidationTypes.Product:
int productIdValue = 0;
bool productIdValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), out productIdValue);
// The ProductId value should be able to be converted to an int, else it is invalid
if (!productIdValueCheck)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
if (scutexLicense.Product.ProductId != productIdValue)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
case ValidationTypes.Fingerprint:
string fingerPrint = hashingProvider.Checksum16(_fingerprintService.GetHardwareFingerprint(FingerprintTypes.Default)).ToString("X");
if (fingerPrint != p.Value.Value)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
case ValidationTypes.ProductIdentifier:
string prodId = hashingProvider.Checksum16(scutexLicense.GetLicenseProductIdentifier()).ToString("X");
prodId = prodId.PadLeft(4, char.Parse("0"));
if (prodId != p.Value.Value)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
case ValidationTypes.None:
string keyValue = decodedLicenseKey.Substring(p.Key, p.Value.Length);
if (keyValue != p.Value.Value)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
default:
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
}
}
return true;
}
public KeyData GetLicenseKeyData(string licenseKey, LicenseBase scutexLicense)
{
// Init all required variables for the process.
Dictionary<int, LicensePlaceholder> placeholerLocations;
List<LicensePlaceholder> licensePlaceholders = CreateLicensePlaceholders(scutexLicense, null);
char[] licenseKeyArray;
string decodedLicenseKey = licenseKey.Replace("-", "");
KeyData keyData = new KeyData();
keyData.IsKeyValid = true;
// Locate all the placeholder tokens in the license template
placeholerLocations = FindAllPlaceholdersInTemplate(licenseKeyTemplate.Replace("-", ""), licensePlaceholders);
bool isKeyValid = ValidateLicenseKey(licenseKey, scutexLicense);
keyData.IsKeyValid = isKeyValid;
if (isKeyValid)
{
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
licenseKeyArray = decodedLicenseKey.ToCharArray();
for (int i = 0; i < p.Value.Length; i++)
{
char previousChar = licenseKeyArray[(p.Key) - 1];
char deObfKey = KeyIntegerValueDeObfuscator(previousChar, licenseKeyArray[p.Key + i], p.Key + i);
licenseKeyArray[p.Key + i] = deObfKey;
}
decodedLicenseKey = new string(licenseKeyArray);
}
}
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
if (p.Value.Token == Char.Parse("k"))
{
int licenseKeyTypeValue = 0;
bool licenseKeyTypeValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), out licenseKeyTypeValue);
if (licenseKeyTypeValueCheck)
keyData.LicenseKeyType = (LicenseKeyTypes)licenseKeyTypeValue;
}
else if (p.Value.Token == Char.Parse("a"))
{
int prodValue = 0;
bool prodValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), out prodValue);
if (prodValueCheck)
keyData.ProductId = prodValue;
}
else if (p.Value.Token == Char.Parse("s"))
{
int licenseSetValue = 0;
bool licenseSetValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), out licenseSetValue);
if (licenseSetValueCheck)
keyData.LicenseSetId = licenseSetValue;
}
}
}
}
return keyData;
}
public KeyData GetLicenseKeyData(string licenseKey, LicenseBase scutexLicense, bool catchException)
{
if (licenseKey == null)
throw new ArgumentNullException("licenseKey");
KeyData data = null;
if (catchException)
{
try
{
return GetKeyData(licenseKey, scutexLicense);
}
catch (ScutexLicenseException)
{
return data;
}
}
return GetKeyData(licenseKey, scutexLicense);
}
private bool ValidateKey(string licenseKey, LicenseBase scutexLicense)
{
if (licenseKey.Length == 15)
return keyGenerator.ValidateLicenseKey(licenseKey, scutexLicense);
else
return _largeKeyGenerator.ValidateLicenseKey(licenseKey, scutexLicense);
}
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;
}
public bool ValidateLicenseKey(string licenseKey, LicenseBase scutexLicense)
{
// Init all required variables for the process.
Dictionary<int, LicensePlaceholder> placeholerLocations;
List<LicensePlaceholder> licensePlaceholders = CreateLicensePlaceholders(scutexLicense, null);
char[] licenseKeyArray;
string decodedLicenseKey = licenseKey.Replace("-", "");
// Locate all the placeholder tokens in the license template
placeholerLocations = FindAllPlaceholdersInTemplate(licenseKeyTemplate.Replace("-", ""), licensePlaceholders);
// STEP 1: Basic length checks
if (licenseKey.Length != licenseKeyTemplate.Length)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
if (decodedLicenseKey.Length != licenseKeyTemplate.Replace("-", "").Length)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
// STEP 2: Compute and verify all the cheksums in the key
foreach (var p in placeholerLocations)
{
if (p.Value.IsChecksum)
{
string originalHash = decodedLicenseKey.Substring(p.Key, p.Value.Length);
int originalHashValue = 0;
// Try and covert the value from originalHash into a Hex number, if this value has been changed (altered) the key is invalid as
// it should always be a hex value.
bool verifyHexOriginalHash = int.TryParse(originalHash, NumberStyles.HexNumber, CultureInfo.InvariantCulture,
out originalHashValue);
// If this isn't a hex value throw the standard exception
if (!verifyHexOriginalHash)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
// Compute the hash again using the rest of hte license key.
int verifyHashValue = int.Parse(hashingProvider.GetChecksumChar(decodedLicenseKey.Substring(0, p.Key)).ToString(), NumberStyles.HexNumber);
// Verify that the stored has is the same as the newly computed hash
if (verifyHashValue != originalHashValue)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
if (!hashingProvider.ValidateChecksumChar(decodedLicenseKey))
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
}
// STEP 3: DeObfuscate key license placeholders that are not cheksums (so they can be verified)
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
licenseKeyArray = decodedLicenseKey.ToCharArray();
for (int i = 0; i < p.Value.Length; i++)
{
char previousChar = licenseKeyArray[(p.Key) - 1];
char deObfKey = KeyIntegerValueDeObfuscator(previousChar, licenseKeyArray[p.Key + i], p.Key + i);
licenseKeyArray[p.Key + i] = deObfKey;
}
decodedLicenseKey = new string(licenseKeyArray);
}
}
// STEP 4: Validate each non-checksum placeholder
foreach (var p in placeholerLocations)
{
if (!p.Value.IsChecksum)
{
switch (p.Value.ValidationType)
{
case ValidationTypes.LicenseKeyType:
int licenseKeyTypeValue = 0;
bool licenseKeyTypeValueCheck = int.TryParse(decodedLicenseKey.Substring(p.Key, p.Value.Length), out licenseKeyTypeValue);
// The LicenseKeyType value should be able to be convered to an int, else it is invalid
if (!licenseKeyTypeValueCheck)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
LicenseKeyTypeFlag typeFlag;
// It is possible that a LicenseKeyType has no supporting LicenseKeyTypeFlag (which means it was
// placeholded in the LicenseKeyType enum but is not operable). If this parse (cast) fails then
// there was a valid LicenseKeyType enum value but no valid LicenseKeyTypeFlag value.
try
{
typeFlag = (LicenseKeyTypeFlag)Enum.Parse(typeof(LicenseKeyTypeFlag), ((LicenseKeyTypes)licenseKeyTypeValue).ToString(), true);
}
catch (Exception)
{
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
// If the LicenseSet does not support the key type supplied then throw an error
if (!scutexLicense.LicenseSets.First().SupportedLicenseTypes.IsSet(typeFlag))
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
case ValidationTypes.None:
string keyValue = decodedLicenseKey.Substring(p.Key, p.Value.Length);
if (keyValue != p.Value.Value)
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
break;
default:
throw new ScutexLicenseException(Resources.ErrorMsg_VerifyLicenseKey);
}
}
}
// If we've gotten this far then it must be valid, right?
return true;
}
private KeyData GetKeyData(string licenseKey, LicenseBase scutexLicense)
{
if (licenseKey.Length == 15)
return keyGenerator.GetLicenseKeyData(licenseKey, scutexLicense);
else
return _largeKeyGenerator.GetLicenseKeyData(licenseKey, scutexLicense);
}
public KeyData GetLicenseKeyData(string licenseKey, LicenseBase scutexLicense)
{
return keyGenerator.GetLicenseKeyData(licenseKey, scutexLicense);
}
public string GenerateLicenseKey(string rsaXmlString, LicenseBase scutexLicense, LicenseGenerationOptions generationOptions)
{
return keyGenerator.GenerateLicenseKey(rsaXmlString, scutexLicense, generationOptions);
}