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added support of hashed password (aka "password 51") to the "start pr…
…ogram from url" feature
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| Myrtille: A native HTML4/5 Remote Desktop Protocol client. | ||
| Copyright(c) 2014-2017 Cedric Coste | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| using System; | ||
| using System.Diagnostics; | ||
| using System.Security.Cryptography; | ||
| using System.Text; | ||
| using System.Text.RegularExpressions; | ||
|
|
||
| namespace Myrtille.Helpers | ||
| { | ||
| public static class RDPCryptoHelper | ||
| { | ||
| /* | ||
| adapted from https://gallery.technet.microsoft.com/scriptcenter/Password-Text-String-34711a5e | ||
| original script by Ken Sweet | ||
| the powershell script ("password51.ps1", located into the myrtille bin folder at runtime or into the Myrtille.Services project under Visual Studio) | ||
| was modified to use "LocalMachine" instead of "CurrentUser" because the powershell user account is different than IIS | ||
| it was also modified to use unicode (UTF-16LE) instead of UTF-8 in order to work with .rdp files ("password 51:b:") | ||
| to generate a password hash, you can use the script on the myrtille gateway (requires access to the machine) | ||
| you may require to update your script execution policy: https://technet.microsoft.com/en-us/library/ee176961.aspx | ||
| to run the script (from its location folder): ". .\password51.ps1" (more info about the functions usage into the script itself) | ||
| the password hash is only valid on the machine which generated it (the myrtille gateway); it won't work on another machine | ||
| the password hash is 492 chars length | ||
| there is another, older, method to generate rdp passwords: https://www.remkoweijnen.nl/blog/2007/10/18/how-rdp-passwords-are-encrypted/ | ||
| for a .NET/C# implementation (Remko Weijnen's tool is written in Delphi/Pascal), see https://msdn.microsoft.com/en-us/library/aa302402.aspx | ||
| the script method described above seems to be backward compatible with it (the 492 chars hashed passwords are decrypted by the Remko Weijnen's tool and work into .rdp files) | ||
| the password hash is 1329 chars length | ||
| mstsc.exe may not save the hashed passwords by default into .rdp files; see https://superuser.com/questions/139665/windows-7-group-policy-allow-rdp-credentials-to-be-saved/140322 | ||
| to create .rdp files with remoteapp: https://technet.microsoft.com/en-us/library/gg674996(v=ws.10).aspx | ||
| full remoteapp walkthrough: https://mizitechinfo.wordpress.com/2013/07/26/fast-and-easy-how-to-deploy-remoteapp-on-windows-server-2012/ | ||
| */ | ||
|
|
||
| public static string EncryptPassword(string password) | ||
| { | ||
| try | ||
| { | ||
| var bytes = ProtectedData.Protect(Encoding.Unicode.GetBytes(password), null, DataProtectionScope.LocalMachine); | ||
|
|
||
| var hex = new StringBuilder(bytes.Length * 2); | ||
| foreach (var _byte in bytes) | ||
| { | ||
| hex.AppendFormat("{0:X2}", _byte); | ||
| } | ||
|
|
||
| return hex.ToString(); | ||
| } | ||
| catch (Exception exc) | ||
| { | ||
| Trace.TraceError("Failed to encrypt rdp password {0} ({1})", password, exc); | ||
| throw; | ||
| } | ||
| } | ||
|
|
||
| public static string DecryptPassword(string passwordHash) | ||
| { | ||
| try | ||
| { | ||
| var bytes = new byte[passwordHash.Length / 2]; | ||
|
|
||
| var i = 0; | ||
| foreach (var hex in Regex.Matches(passwordHash, "(..)")) | ||
| { | ||
| bytes[i++] = Convert.ToByte(hex.ToString(), 16); | ||
| } | ||
|
|
||
| return Encoding.Unicode.GetString(ProtectedData.Unprotect(bytes, null, DataProtectionScope.LocalMachine)); | ||
| } | ||
| catch (Exception exc) | ||
| { | ||
| Trace.TraceError("Failed to decrypt rdp password hash {0} ({1})", passwordHash, exc); | ||
| throw; | ||
| } | ||
| } | ||
| } | ||
| } |
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