/// <summary>
/// 加密解密 报告进度
/// </summary>
/// <param name="inFile"></param>
/// <param name="outFile"></param>
/// <param name="type">ture:加密 false:解密</param>
/// <returns></returns>
public async Task Operating(string inFile, string outFile, string pwd, bool type)
{
CancellationTokenSource token = new CancellationTokenSource();
var progress = new Progress <double>();
progress.ProgressChanged += new EventHandler <double>((o, d) =>
{
if (type)
{
DataRow[] rows = dtEncrypt.Select("Name='" + Path.GetFileName(inFile) + "'");
if (rows?.Length > 0)
{
this.Invoke(new Action(() =>
{
if (rows[0] != null)
{
rows[0]["Progress"] = (int)d;
gridControlEncrypt.RefreshDataSource();
}
}));
}
}
else
{
DataRow[] rows = dtDecrypt.Select("DName='" + Path.GetFileName(inFile) + "'");
if (rows?.Length > 0)
{
this.Invoke(new Action(() =>
{
if (rows[0] != null)
{
rows[0]["DProgress"] = (int)d;
gridControlDecrypt.RefreshDataSource();
}
}));
}
}
});
if (type)
{
await EncryptOperation.EncryptFile(inFile, outFile, pwd, progress, token);
}
else
{
await EncryptOperation.DecryptFile(inFile, outFile, pwd, progress, token);
}
}
/// <summary>
/// 加密文件
/// </summary>
/// <param name="inFile">待加密文件</param>
/// <param name="outFile">加密后输入文件</param>
/// <param name="password">加密密码</param>
public static async Task EncryptFile(string inFile, string outFile, string password, IProgress <double> progress, CancellationTokenSource token)
{
await Task.Run(() =>
{
try
{
using (FileStream fin = File.OpenRead(inFile), fout = File.OpenWrite(outFile))
{
long lSize = fin.Length; // 输入文件长度
byte[] bytes = new byte[BUFFER_SIZE]; // 缓存
int read = -1; // 输入文件读取数量
long value = 0;
// 获取IV和salt
byte[] IV = GenerateRandomBytes(16);
byte[] salt = GenerateRandomBytes(16);
// 创建加密对象
SymmetricAlgorithm sma = EncryptOperation.CreateRijndael(password, salt);
sma.IV = IV;
// 在输出文件开始部分写入IV和salt
fout.Write(IV, 0, IV.Length);
fout.Write(salt, 0, salt.Length);
// 创建散列加密
HashAlgorithm hasher = SHA256.Create();
using (CryptoStream cout = new CryptoStream(fout, sma.CreateEncryptor(), CryptoStreamMode.Write),
chash = new CryptoStream(Stream.Null, hasher, CryptoStreamMode.Write))
{
BinaryWriter bw = new BinaryWriter(cout);
bw.Write(lSize);
bw.Write(FC_TAG);
// 读写字节块到加密流缓冲区
while ((read = fin.Read(bytes, 0, bytes.Length)) != 0)
{
cout.Write(bytes, 0, read);
chash.Write(bytes, 0, read);
value += read;
progress.Report(((double)value / (double)lSize) * 100.00);
}
// 关闭加密流
chash.Flush();
chash.Close();
// 读取散列
byte[] hash = hasher.Hash;
// 输入文件写入散列
cout.Write(hash, 0, hash.Length);
fin.Flush();
fin.Close();
// 关闭文件流
cout.Flush();
fout.Flush();
cout.Close();
fout.Close();
}
}
}
catch (Exception ex)
{
token.Cancel();
}
}, token.Token);
}
/// <summary>
/// 解密文件
/// </summary>
/// <param name="inFile">待解密文件</param>
/// <param name="outFile">解密后输出文件</param>
/// <param name="password">解密密码</param>
public static async Task DecryptFile(string inFile, string outFile, string password, IProgress <double> progress, CancellationTokenSource token)
{
await Task.Run(() => {
try
{
// 创建打开文件流
using (FileStream fin = File.OpenRead(inFile),
fout = File.OpenWrite(outFile))
{
int size = (int)fin.Length;
byte[] bytes = new byte[BUFFER_SIZE];
int read = -1;
int value = 0;
int outValue = 0;
byte[] IV = new byte[16];
fin.Read(IV, 0, 16);
byte[] salt = new byte[16];
fin.Read(salt, 0, 16);
SymmetricAlgorithm sma = EncryptOperation.CreateRijndael(password, salt);
sma.IV = IV;
value = 32;
long lSize = -1;
// 创建散列对象, 校验文件
HashAlgorithm hasher = SHA256.Create();
using (CryptoStream cin = new CryptoStream(fin, sma.CreateDecryptor(), CryptoStreamMode.Read),
chash = new CryptoStream(Stream.Null, hasher, CryptoStreamMode.Write))
{
// 读取文件长度
BinaryReader br = new BinaryReader(cin);
lSize = br.ReadInt64();
ulong tag = br.ReadUInt64();
if (FC_TAG != tag)
{
progress.Report(888);
Debug.WriteLine("The file is damaged");
return;
}
long numReads = lSize / BUFFER_SIZE;
long slack = (long)lSize % BUFFER_SIZE;
for (int i = 0; i < numReads; ++i)
{
read = cin.Read(bytes, 0, bytes.Length);
fout.Write(bytes, 0, read);
chash.Write(bytes, 0, read);
value += read;
outValue += read;
progress.Report(((double)value / (double)lSize) * 100.00);
}
if (slack > 0)
{
read = cin.Read(bytes, 0, (int)slack);
fout.Write(bytes, 0, read);
chash.Write(bytes, 0, read);
value += read;
outValue += read;
progress.Report(((double)value / (double)lSize) * 100.00);
}
chash.Flush();
chash.Close();
fout.Flush();
fout.Close();
byte[] curHash = hasher.Hash;
// 获取比较和旧的散列对象
byte[] oldHash = new byte[hasher.HashSize / 8];
read = cin.Read(oldHash, 0, oldHash.Length);
if ((oldHash.Length != read) || (!CheckByteArrays(oldHash, curHash)))
{
XtraMessageBox.Show("file is damaged");
token.Cancel();
}
cin.Flush();
fin.Flush();
fin.Close();
cin.Close();
}
if (outValue != lSize)
{
XtraMessageBox.Show("decrypt is failed");
token.Cancel();
}
}
}
catch (Exception ex)
{
XtraMessageBox.Show($"decrypt is failed=>{ex.Message}");
token.Cancel();
}
}, token.Token);
}
