/// <summary>
/// DescriptorExists
/// </summary>
/// <param name="sercure_name"></param>
/// <param name="store"></param>
/// <param name="crypto"></param>
/// <returns></returns>
public static bool DescriptorExists(string sercure_name, IStorage store, CryptographyLib.ICryptography crypto)
{
string sub_dir_name = StoragePath.GetDirectory(sercure_name);
string secure_sub_dir_name = SecureStorageUtility.GetSecureName(sub_dir_name, crypto.Key);
return(store.Exists(secure_sub_dir_name));
}
/// <summary>
/// DeleteDirectory
/// </summary>
/// <param name="name">the name of the directory to delete</param>
public void DeleteDirectory(string name)
{
// delete file
string secure_name = GetSecureName(name);
// is this dir empty
XmlDocument me_doc = GetDirectoryDocument(secure_name);
XmlNodeList me_node = me_doc.SelectNodes("/root/file | /root/directory");
if (me_node.Count > 0)
{
//BKP delete all
throw new SecureStorageException("Directory is not empty.");
}
Store.Delete(secure_name);
// decrypt xml dir file
string dir_name = StoragePath.GetDirectory(name);
string secure_dir_name = GetSecureName(dir_name);
XmlDocument doc = GetDirectoryDocument(secure_dir_name);
RemoveNameXml(doc, name);
// delete old dir file
Store.Delete(secure_dir_name);
// create new dir file
string xml = doc.OuterXml;
byte[] data = Encoding.UTF8.GetBytes(xml);
byte[] crypt = crypto.Encrypt(data);
Store.Create(secure_dir_name, crypt, FileMode.Append);
}
/// <summary>
/// Copy
/// </summary>
/// <param name="src_name">the plain text source</param>
/// <param name="dst_name">the plain test destination</param>
public void Copy(string src_name, string dst_name)
{
// get secure names
string secure_src_name = GetSecureName(src_name);
string dir_src_name = StoragePath.GetDirectory(src_name);
string secure_dir_src_name = GetSecureName(dir_src_name);
string secure_dst_name = GetSecureName(dst_name);
string dir_dst_name = StoragePath.GetDirectory(dst_name);
string secure_dir_dst_name = GetSecureName(dir_dst_name);
// create copy on storage
Store.Copy(secure_src_name, secure_dst_name);
// create/append xml file node to xml directory node
XmlDocument src_doc = GetDirectoryDocument(secure_dir_src_name);
string hash = ReadFileSignatureXml(src_doc, src_name); // get hash from doc
XmlDocument dst_doc = GetDirectoryDocument(secure_dir_dst_name);
AppendFileXml(dst_doc, dst_name, hash);
// delete old directory file
Store.Delete(secure_dir_dst_name);
// create new directory file
string xml = dst_doc.OuterXml;
byte[] data = Encoding.UTF8.GetBytes(xml);
byte[] encrypted_data = crypto.Encrypt(data);
Store.Create(secure_dir_dst_name, encrypted_data, FileMode.Append);
}
/// <summary>
/// CreateFile
/// </summary>
/// <param name="name">name of file</param>
/// <param name="data">file data</param>
public void CreateFile(string name, byte[] data)
{
// get all names
string secure_name = GetSecureName(name);
string dir_name = StoragePath.GetDirectory(name);
string secure_dir_name = GetSecureName(dir_name);
// encrypt file to upload
byte[] encrypted_data = crypto.Encrypt(data);
// upload file
CreateAppendFragment(secure_name, encrypted_data);
// create/append xml file node to xml directory node
XmlDocument doc = GetDirectoryDocument(secure_dir_name);
string hash = null;
byte[] sha256 = SecureStorageUtility.SHA256(data);
hash = Convert.ToBase64String(sha256);
AppendFileXml(doc, name, hash);
// delete old directory file
Store.Delete(secure_dir_name);
// create new directory file
string xml = doc.OuterXml;
data = Encoding.UTF8.GetBytes(xml);
encrypted_data = crypto.Encrypt(data);
Store.Create(secure_dir_name, encrypted_data, FileMode.Append);
}
/// <summary>
/// DeleteFile
/// </summary>
/// <param name="name">the name of file to delete</param>
public void DeleteFile(string name)
{
string secure_name = GetSecureName(name);
Store.Delete(secure_name);
// decrypt xml dir file
string dir_name = StoragePath.GetDirectory(name);
string secure_dir_name = GetSecureName(dir_name);
XmlDocument doc = GetDirectoryDocument(secure_dir_name);
RemoveNameXml(doc, name);
// delete old dir file
Store.Delete(secure_dir_name);
// create new dir file
string xml = doc.OuterXml;
byte[] data = Encoding.UTF8.GetBytes(xml);
byte[] crypt = crypto.Encrypt(data);
Store.Create(secure_dir_name, crypt, FileMode.Append);
}
/// <summary>
/// CreateDirectory
/// </summary>
/// <param name="name"></param>
public void CreateDirectory(string name)
{
// get all names
string secure_name = GetSecureName(name);
string dir_name = StoragePath.GetDirectory(name);
string secure_dir_name = GetSecureName(dir_name);
// create descriptor file
CreateDescriptorFile(name);
// create/append xml file node to xml directory node
XmlDocument doc = GetDirectoryDocument(secure_dir_name);
AppendDirectoryXml(doc, name);
// delete old dir file
Store.Delete(secure_dir_name);
// create new dir file
string xml = doc.OuterXml;
byte[] data = Encoding.UTF8.GetBytes(xml);
byte[] encrypted_data = crypto.Encrypt(data);
Store.Create(secure_dir_name, encrypted_data, FileMode.Append);
}