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CarotDav_decompile/Rei.Fs/EncryptFs.cs

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Disassembled CarotDav v1.14.7 with dotPeek 2017.2
2017-10-06 17:20:58 +02:00
// Decompiled with JetBrains decompiler
// Type: Rei.Fs.EncryptFs
// Assembly: Rei.Fs, Version=1.13.2.8796, Culture=neutral, PublicKeyToken=null
// MVID: D8B08A8B-697C-4439-9CFF-1BE4EE46F7B0
// Assembly location: F:\Eigene Dateien\Dropbox\portable Collection\Progs\CarotDAV\Rei.Fs.dll
using Microsoft.VisualBasic.CompilerServices;
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;
namespace Rei.Fs
{
public class EncryptFs : FsBase
{
private static string pVersionName = "1";
private static byte[] pSalt;
private static string pName;
private FsBase basefs;
private string EscapeString;
private string EncryptKey;
private bool HideUnencryptedFile;
private bool HideUnencryptedDirectory;
private Rijndael crypto_none;
private Rijndael crypto_zero;
private const string FormatName = "CarotDAV Encryption 1.0 ";
static EncryptFs()
{
Assembly executingAssembly = Assembly.GetExecutingAssembly();
EncryptFs.pName = ((AssemblyProductAttribute) executingAssembly.GetCustomAttributes(typeof (AssemblyProductAttribute), false)[0]).Product + executingAssembly.GetName().Version.ToString(3);
}
public EncryptFs(FsBase @base, string key, string escape, bool hidefile, bool hidedir)
: base(@base.ConnectionSetting)
{
this.basefs = @base;
this.EncryptKey = key;
this.EscapeString = escape;
this.HideUnencryptedFile = hidefile;
this.HideUnencryptedDirectory = hidedir;
this.crypto_none = Rijndael.Create();
this.crypto_none.Mode = CipherMode.CBC;
this.crypto_none.Padding = PaddingMode.None;
this.crypto_none.BlockSize = 128;
this.crypto_none.KeySize = 256;
this.crypto_zero = Rijndael.Create();
this.crypto_zero.Mode = CipherMode.CBC;
this.crypto_zero.Padding = PaddingMode.Zeros;
this.crypto_zero.BlockSize = 128;
this.crypto_zero.KeySize = 256;
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(this.EncryptKey, Encoding.UTF8.GetBytes("CarotDAV Encryption 1.0 "), 1024);
this.crypto_none.Key = rfc2898DeriveBytes.GetBytes(checked ((int) Math.Round(unchecked ((double) this.crypto_none.KeySize / 8.0))));
this.crypto_none.IV = rfc2898DeriveBytes.GetBytes(checked ((int) Math.Round(unchecked ((double) this.crypto_none.BlockSize / 8.0))));
this.crypto_zero.Key = this.crypto_none.Key;
this.crypto_zero.IV = this.crypto_none.IV;
this.basefs.LogMessage += new EventHandler<LogMessageEventArgs>(this.InnerOnLogMessage);
}
private void InnerOnLogMessage(object sender, LogMessageEventArgs e)
{
this.OnLogMessage(e.Message);
}
public override SecureType LastSecureType
{
get
{
return this.basefs.LastSecureType;
}
}
public override string ClientName
{
get
{
return this.basefs.ClientName;
}
set
{
this.basefs.ClientName = value;
}
}
public override string GroupName
{
get
{
return this.basefs.GroupName;
}
set
{
this.basefs.GroupName = value;
}
}
public override string UserName
{
get
{
return this.basefs.UserName;
}
}
public override string Password
{
get
{
return this.basefs.Password;
}
}
public override FsAbility Ability
{
get
{
return this.basefs.Ability & ~(FsAbility.PartialRead | FsAbility.PartialWrite);
}
}
public override void ResetConnection()
{
this.basefs.ResetConnection();
base.ResetConnection();
}
public override ResourceInfo GetInfo(Uri targeturi)
{
string[] segments1 = this.BaseUri.Segments;
string[] segments2 = targeturi.Segments;
List<ResourceInfo> resourceInfoList = new List<ResourceInfo>();
Uri uri1 = new Uri(this.BaseUri.GetComponents(UriComponents.SchemeAndServer, UriFormat.UriEscaped) + "/");
Uri uri2 = uri1;
bool encrypted = false;
int index1 = 1;
while (index1 < segments1.Length && index1 < segments2.Length && UriUtil.IsSameSegmentString(segments1[index1], segments2[index1]))
{
uri2 = UriUtil.CombineSegment(uri2, segments2[index1]);
uri1 = UriUtil.CombineSegment(uri1, segments2[index1]);
encrypted = false;
checked { ++index1; }
}
int index2 = index1;
while (index1 < segments2.Length)
{
string name = Uri.UnescapeDataString(segments2[index1]).Replace("/", "");
uri2 = UriUtil.CombineName(uri2, this.EncryptName(name));
encrypted = true;
checked { ++index1; }
}
try
{
ResourceInfo info = this.basefs.GetInfo(uri2);
this.CreateInfo2(targeturi, info, encrypted);
return info;
}
catch (RemoteResourceNotFoundException ex)
{
ProjectData.SetProjectError((Exception) ex);
ProjectData.ClearProjectError();
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
throw;
}
if (this.HideUnencryptedDirectory)
throw new RemoteResourceNotFoundException(targeturi);
ResourceInfo[] infoAndEntries = this.basefs.GetInfoAndEntries(uri1);
this.CreateInfo2(uri1, infoAndEntries[0], false);
int num1 = 1;
int num2 = checked (infoAndEntries.Length - 1);
int index3 = num1;
while (index3 <= num2)
{
if (this.CreateInfo(infoAndEntries[0].Id.Uri, infoAndEntries[index3]))
resourceInfoList.Add(infoAndEntries[index3]);
checked { ++index3; }
}
label_16:
string Right = Uri.UnescapeDataString(segments2[index2]);
int num3 = 0;
int num4 = checked (resourceInfoList.Count - 1);
int index4 = num3;
while (index4 <= num4)
{
string lastName = UriUtil.GetLastName(resourceInfoList[index4].Id.Uri);
if (Operators.CompareString(lastName, Right, false) == 0 || Operators.CompareString(lastName + "/", Right, false) == 0 || Operators.CompareString(lastName, Right + "/", false) == 0)
{
checked { ++index2; }
ResourceInfo resourceInfo = resourceInfoList[index4];
if (index2 == segments2.Length)
return resourceInfo;
if (!resourceInfo.IsCollection)
throw new RemoteResourceNotFoundException(targeturi);
resourceInfoList.Clear();
resourceInfoList.AddRange((IEnumerable<ResourceInfo>) this.GetEntries(resourceInfo.Id));
Uri.UnescapeDataString(segments2[index2]);
goto label_16;
}
else
checked { ++index4; }
}
throw new RemoteResourceNotFoundException(targeturi);
}
public override ResourceInfo GetInfo(ResourceId id)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
ResourceInfo info = this.basefs.GetInfo(encryptId.BaseId);
if (this.CreateInfo(UriUtil.GetParent(encryptId.Uri), info))
return info;
throw new RemoteResourceNotFoundException(id.Uri);
}
public override ResourceInfo GetInfo(ResourceId parentid, string name)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) parentid;
string name1 = this.EncryptName(name);
try
{
ResourceInfo info = this.basefs.GetInfo(encryptId.BaseId, name1);
if (this.CreateInfo(encryptId.Uri, info))
return info;
}
catch (RemoteResourceNotFoundException ex)
{
ProjectData.SetProjectError((Exception) ex);
ProjectData.ClearProjectError();
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
throw;
}
ResourceInfo info1 = this.basefs.GetInfo(encryptId.BaseId, name);
this.CreateInfo2(UriUtil.CombineName(encryptId.Uri, name), info1, false);
return info1;
}
public override ResourceInfo GetParentInfo(ResourceId id)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
ResourceInfo parentInfo = this.basefs.GetParentInfo(encryptId.BaseId);
if (this.CreateInfo(UriUtil.GetParent(UriUtil.GetParent(encryptId.Uri)), parentInfo))
return parentInfo;
throw new RemoteResourceNotFoundException(id.Uri);
}
public override ResourceInfo[] GetEntries(ResourceId id)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
ResourceInfo[] entries = this.basefs.GetEntries(encryptId.BaseId);
List<ResourceInfo> resourceInfoList = new List<ResourceInfo>();
int num1 = 0;
int num2 = checked (entries.Length - 1);
int index = num1;
while (index <= num2)
{
if (this.CreateInfo(encryptId.Uri, entries[index]))
resourceInfoList.Add(entries[index]);
checked { ++index; }
}
return resourceInfoList.ToArray();
}
public override ResourceInfo[] GetInfoAndEntries(Uri targeturi)
{
string[] segments1 = this.BaseUri.Segments;
string[] segments2 = targeturi.Segments;
List<ResourceInfo> resourceInfoList = new List<ResourceInfo>();
Uri uri1 = new Uri(this.BaseUri.GetComponents(UriComponents.SchemeAndServer, UriFormat.UriEscaped) + "/");
Uri uri2 = uri1;
bool encrypted = false;
int index1 = 1;
while (index1 < segments1.Length && index1 < segments2.Length && UriUtil.IsSameSegmentString(segments1[index1], segments2[index1]))
{
uri2 = UriUtil.CombineSegment(uri2, segments2[index1]);
uri1 = UriUtil.CombineSegment(uri1, segments2[index1]);
encrypted = false;
checked { ++index1; }
}
int index2 = index1;
while (index1 < segments2.Length)
{
string name = Uri.UnescapeDataString(segments2[index1]).Replace("/", "");
uri2 = UriUtil.CombineName(uri2, this.EncryptName(name));
encrypted = true;
checked { ++index1; }
}
try
{
ResourceInfo[] infoAndEntries = this.basefs.GetInfoAndEntries(uri2);
this.CreateInfo2(targeturi, infoAndEntries[0], encrypted);
resourceInfoList.Add(infoAndEntries[0]);
int num1 = 1;
int num2 = checked (infoAndEntries.Length - 1);
int index3 = num1;
while (index3 <= num2)
{
if (this.CreateInfo(infoAndEntries[0].Id.Uri, infoAndEntries[index3]))
resourceInfoList.Add(infoAndEntries[index3]);
checked { ++index3; }
}
return resourceInfoList.ToArray();
}
catch (RemoteResourceNotFoundException ex)
{
ProjectData.SetProjectError((Exception) ex);
ProjectData.ClearProjectError();
}
if (this.HideUnencryptedDirectory)
throw new RemoteResourceNotFoundException(targeturi);
ResourceInfo[] infoAndEntries1 = this.basefs.GetInfoAndEntries(uri1);
this.CreateInfo2(uri1, infoAndEntries1[0], false);
int num3 = 1;
int num4 = checked (infoAndEntries1.Length - 1);
int index4 = num3;
while (index4 <= num4)
{
if (this.CreateInfo(infoAndEntries1[0].Id.Uri, infoAndEntries1[index4]))
resourceInfoList.Add(infoAndEntries1[index4]);
checked { ++index4; }
}
label_20:
string Right = Uri.UnescapeDataString(segments2[index2]);
int num5 = 0;
int num6 = checked (resourceInfoList.Count - 1);
int index5 = num5;
while (index5 <= num6)
{
string lastName = UriUtil.GetLastName(resourceInfoList[index5].Id.Uri);
if (Operators.CompareString(lastName, Right, false) == 0 || Operators.CompareString(lastName + "/", Right, false) == 0 || Operators.CompareString(lastName, Right + "/", false) == 0)
{
checked { ++index2; }
ResourceInfo resourceInfo = resourceInfoList[index5];
if (index2 != segments2.Length)
{
if (!resourceInfo.IsCollection)
throw new RemoteResourceNotFoundException(targeturi);
resourceInfoList.Clear();
resourceInfoList.AddRange((IEnumerable<ResourceInfo>) this.GetEntries(resourceInfo.Id));
Uri.UnescapeDataString(segments2[index2]);
goto label_20;
}
else
{
if (resourceInfo.IsCollection)
{
resourceInfoList.Clear();
resourceInfoList.Add(resourceInfo);
resourceInfoList.AddRange((IEnumerable<ResourceInfo>) this.GetEntries(resourceInfo.Id));
return resourceInfoList.ToArray();
}
return new ResourceInfo[1]{ resourceInfo };
}
}
else
checked { ++index5; }
}
throw new RemoteResourceNotFoundException(targeturi);
}
public override ResourceInfo[] GetInfoAndEntries(ResourceId id)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
ResourceInfo[] infoAndEntries = this.basefs.GetInfoAndEntries(encryptId.BaseId);
if (!this.CreateInfo(UriUtil.GetParent(encryptId.Uri), infoAndEntries[0]))
throw new RemoteResourceNotFoundException(encryptId.Uri);
List<ResourceInfo> resourceInfoList = new List<ResourceInfo>();
resourceInfoList.Add(infoAndEntries[0]);
int num1 = 1;
int num2 = checked (infoAndEntries.Length - 1);
int index = num1;
while (index <= num2)
{
if (this.CreateInfo(infoAndEntries[0].Id.Uri, infoAndEntries[index]))
resourceInfoList.Add(infoAndEntries[index]);
checked { ++index; }
}
return resourceInfoList.ToArray();
}
public override ResourceInfo[] GetParentInfoAndEntries(ResourceId childid)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) childid;
ResourceInfo[] parentInfoAndEntries = this.basefs.GetParentInfoAndEntries(encryptId.BaseId);
Uri parent = UriUtil.GetParent(encryptId.Uri);
if (!this.CreateInfo(UriUtil.GetParent(parent), parentInfoAndEntries[0]))
throw new RemoteResourceNotFoundException(parent);
List<ResourceInfo> resourceInfoList = new List<ResourceInfo>();
resourceInfoList.Add(parentInfoAndEntries[0]);
int num1 = 1;
int num2 = checked (parentInfoAndEntries.Length - 1);
int index = num1;
while (index <= num2)
{
if (this.CreateInfo(parentInfoAndEntries[0].Id.Uri, parentInfoAndEntries[index]))
resourceInfoList.Add(parentInfoAndEntries[index]);
checked { ++index; }
}
return resourceInfoList.ToArray();
}
public override ReturnedInfo CreateCollection(ResourceId parentid, string name)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) parentid;
string name1 = this.EncryptName(name);
ReturnedInfo collection = this.basefs.CreateCollection(encryptId.BaseId, name1);
ResourceId baseid = !(collection is ResourceInfo) ? (ResourceId) collection : ((ResourceInfo) collection).Id;
return (ReturnedInfo) new EncryptFs.EncryptId(UriUtil.AddLastSlash(UriUtil.CombineName(encryptId.Uri, name)), baseid, true, this);
}
public override void Delete(ResourceId id)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
if (!encryptId.Encrypted && (!encryptId.IsCollection || this.HideUnencryptedDirectory) && (encryptId.IsCollection || this.HideUnencryptedFile))
throw new Exception();
this.basefs.Delete(encryptId.BaseId);
}
public override ReturnedInfo Move(ResourceId id, ResourceId newparentid, string newname, bool overwrite)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
ReturnedInfo returnedInfo;
Uri target;
if (newname == null)
{
ResourceId baseId = ((EncryptFs.EncryptId) newparentid).BaseId;
returnedInfo = this.basefs.Move(encryptId.BaseId, baseId, (string) null, overwrite);
target = UriUtil.CombineName(newparentid.Uri, UriUtil.GetLastName(encryptId.Uri));
}
else if ((object) newparentid == null)
{
string newname1 = !encryptId.Encrypted ? newname : this.EncryptName(newname);
returnedInfo = this.basefs.Move(encryptId.BaseId, (ResourceId) null, newname1, overwrite);
target = UriUtil.CombineName(UriUtil.GetParent(encryptId.Uri), newname);
}
else
{
ResourceId baseId = ((EncryptFs.EncryptId) newparentid).BaseId;
string newname1 = !encryptId.Encrypted ? newname : this.EncryptName(newname);
returnedInfo = this.basefs.Move(encryptId.BaseId, baseId, newname1, overwrite);
target = UriUtil.CombineName(newparentid.Uri, newname);
}
ResourceId baseid = !(returnedInfo is ResourceInfo) ? (ResourceId) returnedInfo : ((ResourceInfo) returnedInfo).Id;
if (encryptId.IsCollection)
target = UriUtil.AddLastSlash(target);
return (ReturnedInfo) new EncryptFs.EncryptId(target, baseid, encryptId.Encrypted, this);
}
public override ReturnedInfo Copy(ResourceId id, ResourceId newparentid, string newname, bool overwrite)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
ReturnedInfo returnedInfo;
Uri target;
if (newname == null)
{
ResourceId baseId = ((EncryptFs.EncryptId) newparentid).BaseId;
returnedInfo = this.basefs.Copy(encryptId.BaseId, baseId, (string) null, overwrite);
target = UriUtil.CombineName(newparentid.Uri, UriUtil.GetLastName(encryptId.Uri));
}
else if ((object) newparentid == null)
{
string newname1 = !encryptId.Encrypted ? newname : this.EncryptName(newname);
returnedInfo = this.basefs.Copy(encryptId.BaseId, (ResourceId) null, newname1, overwrite);
target = UriUtil.CombineName(UriUtil.GetParent(encryptId.Uri), newname);
}
else
{
ResourceId baseId = ((EncryptFs.EncryptId) newparentid).BaseId;
string newname1 = !encryptId.Encrypted ? newname : this.EncryptName(newname);
returnedInfo = this.basefs.Copy(encryptId.BaseId, baseId, newname1, overwrite);
target = UriUtil.CombineName(newparentid.Uri, newname);
}
ResourceId baseid = !(returnedInfo is ResourceInfo) ? (ResourceId) returnedInfo : ((ResourceInfo) returnedInfo).Id;
if (encryptId.IsCollection)
target = UriUtil.AddLastSlash(target);
return (ReturnedInfo) new EncryptFs.EncryptId(target, baseid, encryptId.Encrypted, this);
}
public override ReturnedInfo SetResourceInfo(ResourceInfo info, ResourceInfo original)
{
EncryptFs.EncryptId id = (EncryptFs.EncryptId) info.Id;
ResourceInfo info1 = (ResourceInfo) info.Clone();
ResourceInfo original1 = (ResourceInfo) original.Clone();
info1.Id = ((EncryptFs.EncryptId) info.Id).BaseId;
original1.Id = info1.Id;
if (id.Encrypted || id.IsCollection && !this.HideUnencryptedDirectory || !id.IsCollection && !this.HideUnencryptedFile)
return this.basefs.SetResourceInfo(info1, original1);
throw new Exception();
}
public override ReturnedInfo SetTimes(ResourceId id, DateTime lastmodifiedtime, DateTime creationtime, DateTime lastaccesstime)
{
EncryptFs.EncryptId encryptId = id as EncryptFs.EncryptId;
if (encryptId.Encrypted || encryptId.IsCollection && !this.HideUnencryptedDirectory || !encryptId.IsCollection && !this.HideUnencryptedFile)
return this.basefs.SetTimes(encryptId.BaseId, lastmodifiedtime, creationtime, lastaccesstime);
throw new Exception();
}
public override Stream OpenRead(ResourceId id, ref long start, ref long length)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
if (start < 0L)
throw new ArgumentOutOfRangeException(nameof (start));
if (length == 0L)
throw new ArgumentOutOfRangeException(nameof (length));
if (encryptId.Encrypted)
{
FsBase basefs = this.basefs;
ResourceId baseId = encryptId.BaseId;
long start1 = 0;
long length1 = -1;
Stream basestream = basefs.OpenRead(baseId, ref start1, ref length1);
start = 0L;
length = -1L;
return (Stream) new EncryptFs.CarotCryptStream(this, (ResourceId) encryptId, basestream, this.crypto_none.CreateDecryptor(), length);
}
if (encryptId.IsCollection && !this.HideUnencryptedDirectory || !encryptId.IsCollection && !this.HideUnencryptedFile)
return this.basefs.OpenRead(encryptId.BaseId, ref start, ref length);
throw new Exception();
}
public override Stream OpenWrite(ResourceId parentid, string name, long length)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) parentid;
string name1 = this.EncryptName(name);
Stream basestream = length < 0L ? this.basefs.OpenWrite(encryptId.BaseId, name1, -1L) : this.basefs.OpenWrite(encryptId.BaseId, name1, checked (length + 144L));
return (Stream) new EncryptFs.CarotCryptStream(this, UriUtil.CombineName(encryptId.Uri, name), basestream, this.crypto_zero.CreateEncryptor(), length);
}
public override Stream OpenWriteOver(ResourceId id, long length)
{
EncryptFs.EncryptId encryptId = (EncryptFs.EncryptId) id;
Stream basestream = length < 0L ? this.basefs.OpenWriteOver(encryptId.BaseId, -1L) : this.basefs.OpenWriteOver(encryptId.BaseId, checked (length + 144L));
return (Stream) new EncryptFs.CarotCryptStream(this, encryptId.Uri, basestream, this.crypto_zero.CreateEncryptor(), length);
}
public override Stream OpenWriteResume(ResourceId id, ref long start, ref long length)
{
throw new NotSupportedException();
}
public override ReturnedInfo CloseWrite(Stream st)
{
st.Close();
return ((EncryptFs.CarotCryptStream) st).ReturnedInfo;
}
public override string GetLock(ResourceId id, string owner, int timeoutseconds, FsBase.LockScope scope)
{
return this.basefs.GetLock(((EncryptFs.EncryptId) id).BaseId, owner, timeoutseconds, scope);
}
public override void ReleaseLock(ResourceId id, string locktoken)
{
this.basefs.ReleaseLock(id, locktoken);
}
private string EncryptName(string name)
{
byte[] numArray;
using (ICryptoTransform encryptor = this.crypto_none.CreateEncryptor())
{
byte[] bytes = Encoding.UTF8.GetBytes(name);
byte[] inputBuffer = new byte[16];
if (bytes.Length <= 16)
{
numArray = new byte[16];
Array.Copy((Array) bytes, (Array) inputBuffer, bytes.Length);
encryptor.TransformBlock(inputBuffer, 0, 16, numArray, 0);
}
else
{
numArray = new byte[checked (bytes.Length - 1 + 1)];
int num1 = 0;
int num2 = checked (bytes.Length - 1 - 32);
int num3 = num1;
while (num3 <= num2)
{
encryptor.TransformBlock(bytes, num3, 16, numArray, num3);
checked { num3 += 16; }
}
encryptor.TransformBlock(bytes, num3, 16, numArray, num3);
Array.Copy((Array) numArray, num3, (Array) numArray, checked (num3 + 16), checked (bytes.Length - num3 + 16));
Array.Copy((Array) bytes, checked (num3 + 16), (Array) inputBuffer, 0, checked (bytes.Length - num3 + 16));
encryptor.TransformBlock(inputBuffer, 0, 16, numArray, num3);
}
}
return this.EscapeString + Convert.ToBase64String(numArray).Replace('/', '-').Replace('+', '_').Replace("=", "");
}
private bool TryDecryptName(string name, ref string decrypted)
{
if (!name.StartsWith(this.EscapeString))
return false;
name = name.Substring(this.EscapeString.Length).Replace("-", "/").Replace('_', '+').Replace(" ", "");
if (name.Length % 4 != 0)
name += new string('=', checked (4 - unchecked (name.Length % 4)));
byte[] inputBuffer;
bool flag;
try
{
inputBuffer = Convert.FromBase64String(name);
}
catch (Exception ex)
{
ProjectData.SetProjectError(ex);
flag = false;
ProjectData.ClearProjectError();
goto label_22;
}
byte[] numArray1 = new byte[checked (inputBuffer.Length - 1 + 1)];
using (ICryptoTransform decryptor1 = this.crypto_none.CreateDecryptor())
{
byte[] numArray2 = new byte[16];
byte[] outputBuffer = new byte[16];
if (inputBuffer.Length <= 16)
{
numArray1 = new byte[16];
Array.Copy((Array) inputBuffer, (Array) numArray2, inputBuffer.Length);
decryptor1.TransformBlock(numArray2, 0, 16, numArray1, 0);
}
else
{
int num1 = 0;
int num2 = checked (inputBuffer.Length - 1 - 32);
int num3 = num1;
while (num3 <= num2)
{
decryptor1.TransformBlock(inputBuffer, num3, 16, numArray1, num3);
checked { num3 += 16; }
}
Array.Copy((Array) inputBuffer, checked (num3 + 16), (Array) numArray2, 0, checked (inputBuffer.Length - num3 + 16));
using (ICryptoTransform decryptor2 = this.crypto_none.CreateDecryptor(this.crypto_none.Key, numArray2))
decryptor2.TransformBlock(inputBuffer, num3, 16, outputBuffer, 0);
Array.Copy((Array) outputBuffer, checked (inputBuffer.Length - num3 + 16), (Array) numArray2, checked (inputBuffer.Length - num3 + 16), checked (num3 + 32 - inputBuffer.Length));
decryptor1.TransformBlock(numArray2, 0, 16, numArray1, num3);
Array.Copy((Array) outputBuffer, 0, (Array) numArray1, checked (num3 + 16), checked (inputBuffer.Length - num3 + 16));
}
}
decrypted = Encoding.UTF8.GetString(numArray1).Replace("\0", "");
return true;
label_22:
return flag;
}
private bool CreateInfo(Uri parenturi, ResourceInfo ri)
{
string decrypted = (string) null;
if (this.TryDecryptName(UriUtil.GetLastName(ri.Id.Uri), ref decrypted))
{
Uri target = UriUtil.CombineName(parenturi, decrypted);
if (ri.IsCollection)
target = UriUtil.AddLastSlash(target);
else if (ri.Size < 144L)
{
ri.Size = 0L;
ri.StatusDescription = "Invalid Encrypted File (too small)";
ri.HasError = true;
}
else
ri.Size = checked (ri.Size - 144L);
ri.IsEncrypted = true;
ri.Id = (ResourceId) new EncryptFs.EncryptId(target, ri.Id, true, this);
return true;
}
if (!ri.IsCollection && this.HideUnencryptedFile)
return false;
if (ri.IsCollection && this.HideUnencryptedDirectory)
{
Uri uri = UriUtil.CombineName(parenturi, UriUtil.GetLastName(ri.Id.Uri));
if (uri.Segments.Length > this.BaseUri.Segments.Length)
return false;
int num1 = 1;
int num2 = checked (uri.Segments.Length - 1);
int index = num1;
while (index <= num2)
{
if (!UriUtil.IsSameSegmentString(this.BaseUri.Segments[index], uri.Segments[index]))
return false;
checked { ++index; }
}
}
Uri target1 = UriUtil.CombineName(parenturi, UriUtil.GetLastName(ri.Id.Uri));
if (ri.IsCollection)
target1 = UriUtil.AddLastSlash(target1);
ri.IsEncrypted = false;
ri.Id = (ResourceId) new EncryptFs.EncryptId(target1, ri.Id, false, this);
return true;
}
protected void CreateInfo2(Uri target, ResourceInfo ri, bool encrypted)
{
if (ri.IsCollection)
{
target = UriUtil.AddLastSlash(target);
}
else
{
target = UriUtil.RemoveLastSlash(target);
if (encrypted)
{
if (ri.Size < 144L)
{
ri.Size = 0L;
ri.StatusDescription = "Invalid Encrypted File (too small)";
ri.HasError = true;
}
else
ri.Size = checked (ri.Size - 144L);
}
}
ri.IsEncrypted = encrypted;
ri.Id = (ResourceId) new EncryptFs.EncryptId(target, ri.Id, encrypted, this);
}
private class CarotCryptStream : Stream
{
private EncryptFs pFs;
private ReturnedInfo pReturnedInfo;
private Uri pUri;
private Stream pStream;
private ICryptoTransform pTransform;
private CryptoStreamMode pMode;
private SHA256Managed pSha;
private long pLength;
private long pPosition;
private byte[] pReadBuf;
private byte[] pDecryptBuf;
public CarotCryptStream(EncryptFs fs, Uri uri, Stream basestream, ICryptoTransform transformer, long length)
{
this.pFs = fs;
this.pUri = uri;
this.pTransform = transformer;
this.pMode = CryptoStreamMode.Write;
this.pSha = new SHA256Managed();
this.pLength = length;
this.pPosition = 0L;
byte[] buffer = new byte[64];
Encoding.UTF8.GetBytes("CarotDAV Encryption 1.0 ").CopyTo((Array) buffer, 0);
basestream.Write(buffer, 0, buffer.Length);
CloseNotifyStream closeNotifyStream = new CloseNotifyStream(basestream);
closeNotifyStream.ClosingEvent += new EventHandler(this.Stream_Closing);
closeNotifyStream.ClosedEvent += new EventHandler(this.Stream_Closed);
this.pStream = (Stream) new CryptoStream((Stream) closeNotifyStream, this.pTransform, this.pMode);
}
public CarotCryptStream(EncryptFs fs, ResourceId id, Stream basestream, ICryptoTransform transformer, long length)
{
this.pFs = fs;
this.pReturnedInfo = (ReturnedInfo) id;
this.pTransform = transformer;
this.pMode = CryptoStreamMode.Read;
this.pSha = new SHA256Managed();
this.pLength = length;
this.pPosition = 0L;
this.pStream = basestream;
byte[] numArray = new byte[144];
int offset = 0;
while (offset < numArray.Length)
{
int num = this.pStream.Read(numArray, offset, checked (numArray.Length - offset));
if (num == 0)
throw new InconsistencyDetectedException(this.pUri, "Encrypted file broken");
checked { offset += num; }
}
if (Operators.CompareString(Encoding.UTF8.GetString(numArray, 0, 24), "CarotDAV Encryption 1.0 ", false) != 0)
throw new InconsistencyDetectedException(this.pUri, "Encrypted file broken");
this.pReadBuf = new byte[80];
Array.Copy((Array) numArray, 64, (Array) this.pReadBuf, 0, this.pReadBuf.Length);
this.pDecryptBuf = new byte[0];
}
public ReturnedInfo ReturnedInfo
{
get
{
return this.pReturnedInfo;
}
}
public override bool CanRead
{
get
{
return this.pMode == CryptoStreamMode.Read;
}
}
public override bool CanWrite
{
get
{
return this.pMode == CryptoStreamMode.Write;
}
}
public override bool CanSeek
{
get
{
return false;
}
}
public override void Flush()
{
this.pStream.Flush();
}
public override long Length
{
get
{
return this.pLength;
}
}
public override long Position
{
get
{
return this.pPosition;
}
set
{
throw new NotImplementedException();
}
}
public override long Seek(long offset, SeekOrigin origin)
{
throw new NotImplementedException();
}
public override void SetLength(long value)
{
throw new NotImplementedException();
}
public override int Read(byte[] buffer, int offset, int count)
{
if (this.pMode != CryptoStreamMode.Read)
throw new InvalidOperationException();
if (this.pStream == null)
throw new ObjectDisposedException(this.GetType().FullName);
if (this.pLength >= 0L && checked (this.pPosition + (long) count) > this.pLength)
count = checked ((int) (this.pLength - this.pPosition));
if (count < 0)
throw new ArgumentOutOfRangeException(nameof (count));
if (count == 0)
return 0;
int num1 = 0;
label_11:
int num2 = count;
if (num2 > this.pDecryptBuf.Length)
num2 = this.pDecryptBuf.Length;
Array.Copy((Array) this.pDecryptBuf, 0, (Array) buffer, offset, num2);
checked { count -= num2; }
checked { offset += num2; }
checked { num1 += num2; }
this.pPosition = checked (this.pPosition + (long) num2);
byte[] numArray1 = new byte[checked (this.pDecryptBuf.Length - num2 - 1 + 1)];
Array.Copy((Array) this.pDecryptBuf, num2, (Array) numArray1, 0, checked (this.pDecryptBuf.Length - num2));
this.pDecryptBuf = numArray1;
if (count == 0)
return num1;
int num3 = checked (count + 15) & -16;
byte[] numArray2 = new byte[checked (num3 - 1 + 1)];
int num4 = 0;
while (num4 < numArray2.Length)
{
int num5 = this.pStream.Read(numArray2, num4, checked (numArray2.Length - num4));
if (num5 == 0)
{
byte[] inputBuffer = new byte[checked (this.pReadBuf.Length + num4 - 1 + 1)];
Array.Copy((Array) this.pReadBuf, 0, (Array) inputBuffer, 0, this.pReadBuf.Length);
Array.Copy((Array) numArray2, 0, (Array) inputBuffer, this.pReadBuf.Length, num4);
byte[] numArray3 = new byte[64];
Array.Copy((Array) inputBuffer, checked (inputBuffer.Length - numArray3.Length), (Array) numArray3, 0, numArray3.Length);
byte[] numArray4 = this.pTransform.TransformFinalBlock(inputBuffer, 0, checked (num4 + 15) & -16);
this.pDecryptBuf = new byte[checked (num4 - 1 + 1)];
Array.Copy((Array) numArray4, 0, (Array) this.pDecryptBuf, 0, this.pDecryptBuf.Length);
this.pSha.TransformFinalBlock(this.pDecryptBuf, 0, this.pDecryptBuf.Length);
string s = "";
int num6 = 0;
int num7 = checked (this.pSha.Hash.Length - 1);
int index1 = num6;
while (index1 <= num7)
{
s += this.pSha.Hash[index1].ToString("X2");
checked { ++index1; }
}
byte[] bytes = Encoding.UTF8.GetBytes(s);
if (bytes.Length != numArray3.Length)
throw new IOException("File hash doesn't match.");
int num8 = 0;
int num9 = checked (bytes.Length - 1);
int index2 = num8;
while (index2 <= num9)
{
if ((int) bytes[index2] != (int) numArray3[index2])
throw new IOException("File hash doesn't match.");
checked { ++index2; }
}
if (this.pLength < 0L)
this.pLength = checked (this.pPosition + (long) num4);
else if (this.pLength > checked (this.pPosition + (long) num4))
throw new InvalidRangeException();
if (count > num4)
{
count = num4;
goto label_11;
}
else
goto label_11;
}
else
checked { num4 += num5; }
}
byte[] numArray5 = new byte[checked (num3 - 1 + 1)];
if (num3 < this.pReadBuf.Length)
{
numArray5 = new byte[checked (num3 - 1 + 1)];
this.pTransform.TransformBlock(this.pReadBuf, 0, num3, numArray5, 0);
Array.Copy((Array) this.pReadBuf, num3, (Array) this.pReadBuf, 0, checked (this.pReadBuf.Length - num3));
Array.Copy((Array) numArray2, 0, (Array) this.pReadBuf, checked (this.pReadBuf.Length - num3), num3);
}
else
{
this.pTransform.TransformBlock(this.pReadBuf, 0, this.pReadBuf.Length, numArray5, 0);
this.pTransform.TransformBlock(numArray2, 0, checked (numArray2.Length - this.pReadBuf.Length), numArray5, this.pReadBuf.Length);
Array.Copy((Array) numArray2, checked (numArray2.Length - this.pReadBuf.Length), (Array) this.pReadBuf, 0, this.pReadBuf.Length);
}
this.pSha.TransformBlock(numArray5, 0, numArray2.Length, (byte[]) null, 0);
Array.Copy((Array) numArray5, 0, (Array) buffer, offset, count);
this.pPosition = checked (this.pPosition + (long) count);
int num10 = checked (num1 + count);
this.pDecryptBuf = new byte[checked (num3 - count - 1 + 1)];
Array.Copy((Array) numArray5, count, (Array) this.pDecryptBuf, 0, this.pDecryptBuf.Length);
return num10;
}
public override void Write(byte[] buffer, int offset, int count)
{
if (this.pStream == null)
throw new ObjectDisposedException(this.GetType().FullName);
if (this.pMode != CryptoStreamMode.Write)
throw new InvalidOperationException();
if (this.pLength >= 0L && checked (this.pPosition + (long) count) > this.pLength)
throw new InvalidRangeException();
if (count == 0)
return;
this.pSha.TransformBlock(buffer, offset, count, (byte[]) null, 0);
this.pStream.Write(buffer, offset, count);
this.pPosition = checked (this.pPosition + (long) count);
}
protected override void Dispose(bool disposing)
{
try
{
if (!disposing)
return;
switch (this.pMode)
{
case CryptoStreamMode.Read:
if (this.pStream == null)
break;
this.pStream.Close();
this.pStream = (Stream) null;
break;
case CryptoStreamMode.Write:
if (this.pStream == null)
break;
this.pStream.Close();
this.pStream = (Stream) null;
break;
default:
throw new Exception();
}
}
finally
{
base.Dispose(disposing);
}
}
private void Stream_Closing(object sender, EventArgs e)
{
if (this.pMode != CryptoStreamMode.Write)
throw new InvalidOperationException();
CloseNotifyStream closeNotifyStream = (CloseNotifyStream) sender;
int num1 = checked ((int) unchecked (this.pPosition % (long) this.pTransform.OutputBlockSize));
if (num1 == 0)
num1 = 16;
byte[] buffer = new byte[checked (num1 - 1 + 1)];
closeNotifyStream.Write(buffer, 0, buffer.Length);
this.pSha.TransformFinalBlock(new byte[0], 0, 0);
string s = "";
int num2 = 0;
int num3 = checked (this.pSha.Hash.Length - 1);
int index = num2;
while (index <= num3)
{
s += this.pSha.Hash[index].ToString("X2");
checked { ++index; }
}
byte[] bytes = Encoding.UTF8.GetBytes(s);
if (bytes.Length != 64)
throw new IOException();
closeNotifyStream.Write(bytes, 0, bytes.Length);
}
private void Stream_Closed(object sender, EventArgs e)
{
if (this.pMode != CryptoStreamMode.Write)
throw new InvalidOperationException();
ReturnedInfo returnedInfo = this.pFs.basefs.CloseWrite(((CloseNotifyStream) sender).BaseStream);
ResourceInfo ri = returnedInfo as ResourceInfo;
if (ri != null)
{
this.pFs.CreateInfo2(this.pUri, ri, true);
this.pReturnedInfo = (ReturnedInfo) ri;
}
else
this.pReturnedInfo = (ReturnedInfo) new EncryptFs.EncryptId(this.pUri, returnedInfo as ResourceId, true, this.pFs);
if (this.pLength >= 0L && this.pPosition != this.pLength)
throw new InvalidRangeException();
}
}
[Serializable]
public class EncryptId : ResourceId
{
private ResourceId pBaseId;
private bool pEncrypted;
public EncryptId(Uri target, ResourceId baseid, bool encrypted, EncryptFs fs)
: base(target, (FsBase) fs)
{
this.pBaseId = baseid;
this.pEncrypted = encrypted;
}
public ResourceId BaseId
{
get
{
return this.pBaseId;
}
}
public bool Encrypted
{
get
{
return this.pEncrypted;
}
}
}
}
}
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