public void createFile(string strContent, string userName, string downloadName)
{
byte[] key, iv;
string[] fileName = filePath.Split('\\');
string FileName = fileName[fileName.Length - 1];
//加密文件内容
AesHelp.GenKeyIV(out key, out iv);
AesHelp.EncryptString(strContent, AppDomain.CurrentDomain.BaseDirectory + "/files/" + userName + "_" + FileName, key, iv);
FileTable file = new FileTable();
file.UploadId = getID(userName);
file.FileName = FileName;
file.FilePath = AppDomain.CurrentDomain.BaseDirectory + "/files/" + userName + "_" + FileName;
file.DownloadId = getID(downloadName);
file.SessionKey = saveSessionKey(key, iv, downloadName, FileName);
saveFile(file);
}
private void decrypt(string priPath, string sessionPath, string filePath, string downloadPath)
{
string privateKey, sessionKey;
byte[] enkey, eniv;
using (StreamReader sr = new StreamReader(sessionPath))
{
sessionKey = sr.ReadToEnd();
}
string[] s = sessionKey.Split(',');
enkey = Convert.FromBase64String(s[0]);
eniv = Convert.FromBase64String(s[1]);
using (StreamReader sr = new StreamReader(priPath))
{
privateKey = sr.ReadLine();
}
//解密会话密钥
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(privateKey);
byte[] key = rsa.Decrypt(enkey, false);
byte[] iv = rsa.Decrypt(eniv, false);
//解密文件
string[] fileName = filePath.Split('/');
string downFile = downloadPath + "\\" + fileName[fileName.Length - 1];
string deContent = AesHelp.DescyrptString(filePath, downFile, key, iv);
using (StreamWriter sw = new StreamWriter(downFile))
{
sw.WriteLine(deContent);
}
//this.txt.Text = AesHelp.DescyrptString("../../files/" + userName + "_" + FileName, decrypt, iv);
//string asd = Convert.ToBase64String(iv);//存储iv
//this.txt.Text = Convert.ToBase64String(iv);
//解密key,iv byte[] ds = Convert.FromBase64String(asd);
}