public static string HexString(this byte[] bytes, int len)
{
return(DataFormatProcessor.BytesToHexString(bytes, len));
}
/// <summary>
/// 加密任务结果内容
/// </summary>
/// <param name="filestr"></param>
/// <returns></returns>
private static String EncryptInfo(String filestr)
{
//使用 DataFormatProcessor获取 4字节
Byte[] validdata = DataFormatProcessor.StringToBytes(filestr);
if (validdata == null || validdata.Length < 1)
{
return(null);
}
//总长度
Int32 allLen = validdata.Length;
//原文
Byte[] rawbytes = new Byte[Const_AESEncryptLen];
//密文
Byte[] endata = null;
String Ciphertext = String.Empty;
if (allLen <= Const_AESEncryptLen) //小于等于16字节
{
Array.Copy(validdata, 0, rawbytes, 0, validdata.Length);
//AES加密
m_aes.Encrypt(rawbytes, ref endata);
//转换为HEX string
Ciphertext = DataFormatProcessor.BytesToHexString(endata);
return(Ciphertext);
}
//原始数据大于16字节，分段传输
//已发送的长度
Int32 sentDataTableLen = 0;
//剩余需要发送的长度
Int32 lastDataTableLen = allLen;
rawbytes = new Byte[] { };
List <String> CiphertextList = new List <string> {
};
//检查当前剩下还没发送的数据长度,是否超过32K
while (lastDataTableLen > Const_AESEncryptLen) //超过时，分段发送
{
endata = null;
rawbytes = new Byte[Const_AESEncryptLen];
Array.Copy(validdata, sentDataTableLen, rawbytes, 0, Const_AESEncryptLen);
//随后 已发送长度增加32K
sentDataTableLen += Const_AESEncryptLen;
lastDataTableLen -= Const_AESEncryptLen;
//AES加密
m_aes.Encrypt(rawbytes, ref endata);
//转换为HEX string
Ciphertext = DataFormatProcessor.BytesToHexString(endata);
CiphertextList.Add(Ciphertext);
}
endata = null;
//如果剩余不足32K, 直接全部发送,并且通知客户端已经发送完毕
rawbytes = new Byte[Const_AESEncryptLen];
Array.Copy(validdata, sentDataTableLen, rawbytes, 0, lastDataTableLen);
//AES加密
m_aes.Encrypt(rawbytes, ref endata);
//转换为HEX string
Ciphertext = DataFormatProcessor.BytesToHexString(endata);
CiphertextList.Add(Ciphertext);
return(DataFormatProcessor.ListToString(CiphertextList, ""));
}
