Exemplo n.º 1
0
        /// <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));
        }
Exemplo n.º 2
0
        /// <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);
        }
Exemplo n.º 3
0
 /// <summary>
 /// get a secure name
 /// </summary>
 /// <param name="name">orginal name</param>
 /// <returns>secure name based off original</returns>
 private string GetSecureName(string name)
 {
     byte[] hash = SecureStorageUtility.HMACSHA256(name, crypto.Key);
     return(SecureStorageUtility.FromBytesToHex(hash));
 }
Exemplo n.º 4
0
 /// <summary>
 /// ReadFileSignatureXml
 /// </summary>
 /// <param name="doc"></param>
 /// <param name="name"></param>
 /// <returns></returns>
 private string ReadFileSignatureXml(XmlDocument doc, string name)
 {
     return(SecureStorageUtility.ReadFileSignatureXml(doc, name));
 }
Exemplo n.º 5
0
 /// <summary>
 /// GetSecureHash
 /// </summary>
 /// <param name="data">data</param>
 /// <returns>string</returns>
 public string GetSecureHash(string data)
 {
     byte[] hash = SecureStorageUtility.HMACSHA256(data, Key);
     return(SecureStorageUtility.FromBytesToHex(hash));
 }