/// <summary>
/// 对文件主体部分进行加密
/// </summary>
/// <param name="date">数据</param>
/// <param name="sendDateLabel">标签</param>
/// <returns>加密之后的数据</returns>
private static byte[] SendSubjectEncryption(byte[] date, int sendDateLabel)
{
byte[] dateOverall = ByteToDate.OffsetEncryption(date, sendDateLabel, 2);
dateOverall[0] = PasswordCode._bigDateCode;
dateOverall[1] = PasswordCode._fileSubjectCode;
return(dateOverall);
}
/// <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>
/// 一个普通的对数据主体部分进行加密；
/// </summary>
/// <param name="date">要加密的数据</param>
/// <param name="textCode"></param>
/// <param name="state">StateBase</param>
/// <returns>加密之后的数据</returns>
private static byte[] encryptionTemporary(byte[] date, byte textCode, StateBase state)
{
if (date.Length > state.BufferSize - 20)
{
return(EncryptionDecryptSeparateDate.SendHeadEncryption(date, textCode, state)); //超出通过文件系统发送
}
state.SendDateLabel = RandomPublic.RandomNumber(16787); //给发送的数据进行编号
byte[] dateOverall = ByteToDate.OffsetEncryption(date, state.SendDateLabel, 2);
dateOverall[0] = PasswordCode._commonCode; dateOverall[1] = textCode;
return(dateOverall);
}