/// <summary> /// 对文件主体进行加密 /// </summary> /// <param name="fileSend">FileState</param> /// <param name="bufferSize">缓冲区大小</param> /// <returns>加密之后数据</returns> internal static byte[] FileSubjectEncryption(FileState fileSend, int bufferSize) { byte[] dateOverall = null; if (fileSend.StateFile == 2)//说明我这里已经暂停了;要发一个暂停的消息给对方 { dateOverall = FileSevenEncryption(PasswordCode._sendUser, PasswordCode._sendStop, fileSend.FileLabel); return(dateOverall); } int BufferSize = bufferSize - 24; if (fileSend.FileLenth - fileSend.FileOkLenth < BufferSize) { BufferSize = (int)(fileSend.FileLenth - fileSend.FileOkLenth); } byte[] haveDate = new byte[BufferSize]; int haveDatelenth = 1; try { haveDatelenth = fileSend.Filestream.Read(haveDate, 0, BufferSize); }//异常说明这个文件已经被我方取消掉;返回一个取消信息给对方 catch { return(EncryptionDecryptFile.FileSevenEncryption(PasswordCode._sendUser, PasswordCode._fileCancel, fileSend.FileLabel)); } if (haveDatelenth <= 0) { return(null); //说明数据发完了,文件会到外面去关掉 } fileSend.FileOkLenth = fileSend.FileOkLenth + haveDatelenth; dateOverall = ByteToDate.OffsetEncryption(haveDate, fileSend.FileLabel, 3); dateOverall[0] = PasswordCode._fileCode; dateOverall[1] = PasswordCode._sendUser; dateOverall[2] = PasswordCode._fileSubjectCode; return(dateOverall); }
/// <summary> /// 对文件主体进行解密; /// </summary> /// <param name="fileSend"></param> /// <param name="receiveDate"></param> /// <returns></returns> internal static byte[] FileSubjectDecrypt(FileState fileSend, byte[] receiveDate) { byte[] haveDate = null; if (fileSend.StateFile == 2)//说明我这里已经暂停了;要发一个暂停的消息给对方 { return(FileSevenEncryption(PasswordCode._receiveUser, PasswordCode._sendStop, fileSend.FileLabel)); } haveDate = new byte[receiveDate.Length - 7]; Array.Copy(receiveDate, 7, haveDate, 0, haveDate.Length); try { fileSend.Filestream.Write(haveDate, 0, haveDate.Length); }//异常说明这个文件已经被我方取消掉;返回一个取消信息给对方 catch { return(EncryptionDecryptFile.FileSevenEncryption(PasswordCode._receiveUser, PasswordCode._fileCancel, fileSend.FileLabel)); } fileSend.FileOkLenth = fileSend.FileOkLenth + haveDate.Length; haveDate = FileSevenEncryption(PasswordCode._receiveUser, PasswordCode._dateSuccess, fileSend.FileLabel); return(haveDate); }