Description
Description
I have PowerShell code to query a DC via LDAP that hangs in .NET 7.0.102 on macOS Ventura. This has been happening for at least a year across several versions of .NET and macOS. Almost identical code, differing only in SessionOptions.StartTransportLayerSecurity($null) instead of SessionOptions.SecureSocketLayer = $true and targeting OpenLDAP instead of AD, works fine. And the code that hangs on macOS works fine in .NET 7.0.304 on Windows.
The hang happens in System.DirectoryServices.Protocols.LdapConnection.SendRequest. Calling LdapConnection.Bind first does not hang, but it also does not prevent SendRequest from hanging.
Reproduction Steps
$LdapServer = 'host.name.of.a.domain.controller'
$LdapPort = 636
$LdapDirID = New-Object System.DirectoryServices.Protocols.LdapDirectoryIdentifier($LdapServer, $LdapPort, $true, $false)
$Credential = Get-Credential
$LdapCred = New-Object System.Net.NetworkCredential($Credential.Username, $Credential.Password)
$LdapAuthType = [System.DirectoryServices.Protocols.AuthType]'Basic'
$LdapConnection = New-Object System.DirectoryServices.Protocols.LdapConnection($LdapDirID, $LdapCred, $LdapAuthType)
$LdapConnection.SessionOptions.SecureSocketLayer = $true
$LdapBase = 'dc=abc,dc=xyz,dc=edu'
$LdapFilter = '(samaccountname=MeMyselfAndI)'
$LdapScope = [System.DirectoryServices.Protocols.SearchScope]'Subtree'
$SearchRequest = New-Object System.DirectoryServices.Protocols.SearchRequest($LdapBase, $LdapFilter, $LdapScope)
$LdapConnection.Bind()
$SearchResponse = $LdapConnection.SendRequest($SearchRequest) # Hangs forever
Changing these three lines makes it work:
$LdapServer = 'host.name.of.an.OpenLDAP.server'
$LdapPort = 389
$LdapConnection.SessionOptions.StartTransportLayerSecurity($null)
Expected behavior
I get a response from the LDAP server.
Actual behavior
LdapConnection.SendRequest hangs so badly that ^C won't stop it. I have to close the terminal window, which I have verified does kill the process (three cheers for SIGHUP).
Regression?
It has never worked in .NET 7 in my observation, but I don't claim to have tested every version.
Known Workarounds
No workaround.
Configuration
.NET SDK:
Version: 7.0.102
Commit: 4bbdd14480
Runtime Environment:
OS Name: Mac OS X
OS Version: 13.4
OS Platform: Darwin
RID: osx.13-x64
PowerShell 7.3.1
Earlier versions of both .NET 7 and macOS exhibit the problem. .NET 7 on Windows does not, at least not as of:
.NET SDK:
Version: 7.0.304
Commit: 7e794e2806
Runtime Environment:
OS Name: Windows
OS Version: 10.0.17763
OS Platform: Windows
RID: win10-x64
PowerShell 7.3.4
Other information
No response