public void DecryptDB()
{
if (File.Exists(DBFileName) == false || new FileInfo(DBFileName).Length < 500)
{
this.Close();
return;
}
FileStream fileStream_ConnectingServiceXMLDB = null;
try
{
MemoryStream memoryStream_XMLData = new MemoryStream(),
memoryStream_DecryptedXMLData = new MemoryStream(),
memoryStream_EncryptedXMLData = null;
SHA256Managed sHA256Managed_obj = new SHA256Managed();
RijndaelManaged rijndaelManaged_obj = new RijndaelManaged();
CryptoStream cryptoStream_obj = null;
fileStream_ConnectingServiceXMLDB = File.Open(DBFileName, FileMode.Open, FileAccess.Read);
byte [] byteArray_ComputedXMLDataHash = new byte[32], byteArray_ComputedHashOfPasswordHash = new byte[32],
byteArray_StoredXMLDataHash = new byte[32], byteArray_StoredHashOfPasswordHash = new byte[32],
byteArray_DecompressedXMLData = null, byteArray_ComputedPasswordHash, byteArray_ConnectingServiceDBHeader = new byte[22],
byteArray_EncryptedXMLData = new byte[fileStream_ConnectingServiceXMLDB.Length - 88];
byte byte_ToEncryptServerDataBase = 0, byte_ToCompressSettingsDataBase = 0;
fileStream_ConnectingServiceXMLDB.Read(byteArray_ConnectingServiceDBHeader, 0, byteArray_ConnectingServiceDBHeader.Length);
if (CommonMethods.AreBytesArraysEquals(System.Text.Encoding.Default.GetBytes("ConnectingServiceDB010"), byteArray_ConnectingServiceDBHeader) == false)
{
fileStream_ConnectingServiceXMLDB.Close();
MessageBox.Show(ServerStringFactory.GetString(124, MainForm.CurrentLanguage), ServerStringFactory.GetString(1, MainForm.CurrentLanguage));
this.Close();
return;
}
byte_ToEncryptServerDataBase = (byte)fileStream_ConnectingServiceXMLDB.ReadByte();
byte_ToCompressSettingsDataBase = (byte)fileStream_ConnectingServiceXMLDB.ReadByte();
fileStream_ConnectingServiceXMLDB.Read(byteArray_StoredXMLDataHash, 0, byteArray_StoredXMLDataHash.Length);
fileStream_ConnectingServiceXMLDB.Read(byteArray_StoredHashOfPasswordHash, 0, byteArray_StoredHashOfPasswordHash.Length);
if (byte_ToEncryptServerDataBase == 1)
{
byteArray_ComputedPasswordHash = sHA256Managed_obj.ComputeHash(System.Text.Encoding.Default.GetBytes(this.textBox_PasswordPromptForm_Password.Text));
byteArray_ComputedHashOfPasswordHash = sHA256Managed_obj.ComputeHash(byteArray_ComputedPasswordHash);
if (CommonMethods.AreBytesArraysEquals(byteArray_ComputedHashOfPasswordHash, byteArray_StoredHashOfPasswordHash) == false)
{
MessageBox.Show(ServerStringFactory.GetString(126, MainForm.CurrentLanguage), ServerStringFactory.GetString(1, MainForm.CurrentLanguage), MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
rijndaelManaged_obj.KeySize = 256;
rijndaelManaged_obj.Key = byteArray_ComputedPasswordHash;
rijndaelManaged_obj.IV = new byte[rijndaelManaged_obj.BlockSize / 8];
fileStream_ConnectingServiceXMLDB.Read(byteArray_EncryptedXMLData, 0, byteArray_EncryptedXMLData.Length);
memoryStream_EncryptedXMLData = new MemoryStream(byteArray_EncryptedXMLData);
cryptoStream_obj = new CryptoStream(memoryStream_EncryptedXMLData, rijndaelManaged_obj.CreateDecryptor(), CryptoStreamMode.Read);
while (true)
{
int int_Byte = cryptoStream_obj.ReadByte();
if (int_Byte == -1)
{
break;
}
memoryStream_DecryptedXMLData.WriteByte((byte)int_Byte);
}
memoryStream_EncryptedXMLData.Close();
cryptoStream_obj.Flush();
cryptoStream_obj.Clear();
cryptoStream_obj.Close();
CommonEnvironment.EncryptSettingsDataBase = true;
CommonEnvironment.LocalSecurityPassword = this.textBox_PasswordPromptForm_Password.Text;
memoryStream_XMLData = new MemoryStream(memoryStream_DecryptedXMLData.ToArray());
memoryStream_DecryptedXMLData.Close();
}
if (byte_ToCompressSettingsDataBase == 1)
{
byteArray_DecompressedXMLData = new YakSys.Compression.CommonEnvironment().Decompress(memoryStream_XMLData.ToArray(), false);
memoryStream_XMLData = new MemoryStream(byteArray_DecompressedXMLData);
CommonEnvironment.CompressSettingsDataBase = true;
}
else
{
CommonEnvironment.CompressSettingsDataBase = false;
}
fileStream_ConnectingServiceXMLDB.Close();
ConnectingServiceDBSupplier ConnectingServiceDBSupplier_obj = new ConnectingServiceDBSupplier();
ConnectingServiceDBSupplier_obj.RetriveServerSettingsData(memoryStream_XMLData);
ObjCopy.obj_MainForm.SetUpServerSettingsFromDB();
memoryStream_XMLData.Close();
this.Close();
}
catch (Exception)
{
MessageBox.Show(ServerStringFactory.GetString(125, MainForm.CurrentLanguage), ServerStringFactory.GetString(1, MainForm.CurrentLanguage));
}
finally
{
fileStream_ConnectingServiceXMLDB.Close();
}
}