/// ----------------------------------------------------------------------------------------
/// <summary>
/// Encrypt preferences using a password
/// </summary>
/// ----------------------------------------------------------------------------------------
// Encrypt preferences using a password
public static byte[] EncryptDataUsingPassword(byte[] data, string password, bool passwordIsHash, SEBSettings.sebConfigPurposes configPurpose)
{
string prefixString;
// Check if .seb file should start exam or configure client
if (configPurpose == SEBSettings.sebConfigPurposes.sebConfigPurposeStartingExam)
{
// prefix string for starting exam: normal password will be prompted
prefixString = PASSWORD_MODE;
}
else
{
// prefix string for configuring client: configuring password will either be hashed admin pw on client
// or if no admin pw on client set: empty pw
prefixString = PASSWORD_CONFIGURING_CLIENT_MODE;
if (!String.IsNullOrEmpty(password) && !passwordIsHash)
{
//empty password means no admin pw on clients and should not be hashed
//or we got already a hashed admin pw as settings pw, then we don't hash again
password = SEBProtectionController.ComputePasswordHash(password);
}
}
byte[] encryptedData = SEBProtectionController.EncryptDataWithPassword(data, password);
// Create byte array large enough to hold prefix and data
byte[] encryptedSebData = new byte[encryptedData.Length + PREFIX_LENGTH];
Buffer.BlockCopy(Encoding.UTF8.GetBytes(prefixString), 0, encryptedSebData, 0, PREFIX_LENGTH);
Buffer.BlockCopy(encryptedData, 0, encryptedSebData, PREFIX_LENGTH, encryptedData.Length);
return(encryptedSebData);
}
public static byte[] EncryptDataUsingPassword(byte[] data, string password, bool passwordIsHash, SEBSettings.sebConfigPurposes configPurpose)
{
string s;
if (configPurpose == SEBSettings.sebConfigPurposes.sebConfigPurposeStartingExam)
{
s = "pswd";
}
else
{
s = "pwcc";
if (!string.IsNullOrEmpty(password) && !passwordIsHash)
{
password = SEBProtectionController.ComputePasswordHash(password);
}
}
byte[] numArray1 = SEBProtectionController.EncryptDataWithPassword(data, password);
byte[] numArray2 = new byte[numArray1.Length + 4];
Buffer.BlockCopy((Array)Encoding.UTF8.GetBytes(s), 0, (Array)numArray2, 0, 4);
Buffer.BlockCopy((Array)numArray1, 0, (Array)numArray2, 4, numArray1.Length);
return(numArray2);
}