//-------------------------------------------------------------------------
public DbContent()
{
Provider = ProviderType.OleDB;
CommandTimeout = 15;
Fields = new List <string>();
ed = new EncrDecr(string.Empty, string.Empty);
dbController = SqlController.CreateSqlController(this);
}
public static DataFile.PadlockFile OpenFile(byte[] source, string unlockPassword)
{
EncrDecr ed;
ed = new EncrDecr();
byte[] crypt_key; // public key for encrypted doc
byte[] crypt_iv; // init vectory for encrypted doc
crypt_key = new byte[EncrDecr.C_KEYSIZE];
crypt_iv = new byte[EncrDecr.C_IVSIZE];
using (MemoryStream memory = new MemoryStream(source))
{
// Use the memory stream in a binary reader.
using (BinaryReader br = new BinaryReader(memory, System.Text.Encoding.UTF8))
{
string tmp;
// read 'PASSWORD-'
tmp = br.ReadString();
// set password
int i;
for (i = 0; i < unlockPassword.Length && i < EncrDecr.C_KEYSIZE; i++)
{
crypt_key[i] = (byte)(unlockPassword[i] & 0xFF);
}
byte[] data = new Byte[memory.Length - (tmp.Length + 1) - (EncrDecr.C_KEYSIZE - i) - EncrDecr.C_IVSIZE];
// read crypt-key
for (; i < EncrDecr.C_KEYSIZE; i++)
{
crypt_key[i] = br.ReadByte();
}
// read crypt-iv
br.Read(crypt_iv, 0, EncrDecr.C_IVSIZE);
// read VerifyText
byte[] data_test = new Byte[C_VERIFYTEXT.Length * 2 + 16];
br.Read(data_test, 0, C_VERIFYTEXT.Length * 2 + 16);
string decrypted = ed.Decrypt(data_test, crypt_key, crypt_iv);
string verifyText = C_VERIFYTEXT;
int compare = decrypted.CompareTo(verifyText);
if (compare != 0)
{
// wrong password return null string
return(null);
}
else
{
// correct password return xml
byte[] data_frag = new Byte[C_BLOCKSIZE * 2 + 16];
int realsize;
System.Text.StringBuilder xml = new System.Text.StringBuilder(10000);
while ((realsize = br.Read(data_frag, 0, C_BLOCKSIZE * 2 + 16)) > 0)
{
int olds = xml.Length;
ed = new EncrDecr();
string element = ed.Decrypt(data_frag, crypt_key, crypt_iv);
xml.Append(element, 0, element.Length);
}
PadlockFile pf = ParsePazwordFile(xml.ToString());
//string json = JsonConvert.SerializeObject(pf);
//PadlockFile pf2 = JsonConvert.DeserializeObject<PadlockFile>(json);
return(pf);
}
}
}
}
