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Bug #12948

closed

IPsec Profile Wizard/Windows: Script generated for IKEv2 VPN using GCM does not use an optimal Phase 2 hash configuration

Added by Marcos M about 2 years ago. Updated about 1 year ago.

Status:
Resolved
Priority:
Normal
Assignee:
Jim Pingle
Category:
IPsec Profile Wizard
Target version:
-
Start date:
Due date:
% Done:

100%

Estimated time:
Plus Target Version:
Affected Version:
Affected Plus Version:
Affected Architecture:

Description

When mixing AE ciphers in a P2 with AEAD ciphers (e.g. AES with AES128-GCM), the wizard will generate a script with the following:

# Set VPN Config
Set-VpnConnectionIPsecConfiguration -Name "VPN (pfsense) - UNA IPsec VPN" `
 -EncryptionMethod AES256 -IntegrityCheckMethod SHA256 -DHGroup Group14 `
 -CipherTransformConstants GCMAES128 -AuthenticationTransformConstants SHA256128 -PfsGroup None `
 -PassThru -Force

When using the "-GCM" ciphers, the wizard should default to using the most secure valid combination. In this case AuthenticationTransformConstants should be set to None. An invalid combination leads to a Windows error stating:

The IPsec cipher transform is not compatible with the policy.

Supported combinations and more details are listed here:
https://docs.microsoft.com/en-us/troubleshoot/windows-server/windows-security/description-support-suite-b-cryptographic-ipsec
https://docs.microsoft.com/en-us/powershell/module/vpnclient/set-vpnconnectionipsecconfiguration?view=win10-ps

Related issues

Related to Bug #13368: IPsec Profile Wizard/Windows: Cannot generate a script for IKEv2 VPN using GCM ciphers when mobile P2 has no hash algorithms selectedResolvedJim Pingle

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Related to Bug #13877: IPsec Profile Wizard/Windows: IKEv2 VPN using GCM configured by the generated script fails to connect with "The IPsec cipher transform is not compatible with the policy"ResolvedJim Pingle

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 #2

Updated by Viktor Gurov about 2 years ago

  • Assignee set to Viktor Gurov
  • Release Notes deleted (Default)
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 #3

Updated by Jim Pingle about 2 years ago

  • Project changed from pfSense Plus to pfSense Packages
  • Category changed from IPsec to IPsec Profile Wizard
  • Status changed from New to Pull Request Review
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 #4

Updated by Viktor Gurov about 2 years ago

  • Status changed from Pull Request Review to Feedback

Merged

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 #5

Updated by Marcos M almost 2 years ago

  • Status changed from Feedback to Resolved

Now works.

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 #6

Updated by Jim Pingle about 1 year ago

  • Related to Bug #13368: IPsec Profile Wizard/Windows: Cannot generate a script for IKEv2 VPN using GCM ciphers when mobile P2 has no hash algorithms selected added
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 #7

Updated by Jim Pingle about 1 year ago

  • Related to Bug #13877: IPsec Profile Wizard/Windows: IKEv2 VPN using GCM configured by the generated script fails to connect with "The IPsec cipher transform is not compatible with the policy" added
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 #8

Updated by Jim Pingle about 1 year ago

  • Status changed from Resolved to New
  • Assignee changed from Viktor Gurov to Jim Pingle
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 #9

Updated by Jim Pingle about 1 year ago

The code added here was incorrect, see #13368 and #13877

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 #10

Updated by Jim Pingle about 1 year ago

  • Subject changed from IPsec Export: Windows generates invalid configuration to IPsec Profile Wizard/Windows: Script generated for IKEv2 VPN using GCM does not use an optimal Phase 2 hash configuration
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 #11

Updated by Jim Pingle about 1 year ago

  • Status changed from New to Feedback
  • % Done changed from 0 to 100

Fixed in IPsec Profile Wizard pkg v. 1.1, which has been committed and will be available with the next build.

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 #12

Updated by Danilo Zrenjanin about 1 year ago

Tested against:

23.01-RC (amd64)
built on Thu Jan 26 21:31:39 UTC 2023
FreeBSD 14.0-CURRENT

ipsec-profile-wizard    net    1.1_1

The generated script looks fine:

# IKEv2 VPN Import Script
# Automatically generated by pfSense
Set-Location -Path $PSScriptRoot

# Import Server Certificate CA
Import-Certificate -FilePath "pfSense_ikev2_63d3a321cb738.pem" -CertStoreLocation Cert:\LocalMachine\Root\

# Add VPN Connection
Add-VpnConnection -Name "VPN (pftest2) - Remote-IPsec" -TunnelType "Ikev2" -EncryptionLevel Required `
  -ServerAddress IPsec_Cert -PassThru

# Set VPN Config
Set-VpnConnectionIPsecConfiguration -Name "VPN (pftest2) - Remote-IPsec" `
 -EncryptionMethod GCMAES128 -IntegrityCheckMethod SHA256 -DHGroup Group14 `
 -CipherTransformConstants GCMAES128 -AuthenticationTransformConstants GCMAES128 -PfsGroup PFS2048 `
 -PassThru -Force

I was able to import the config and connect successfully from Windows 10 machine.

This ticket can be resolved.

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 #13

Updated by Jim Pingle about 1 year ago

  • Status changed from Feedback to Resolved
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 #14

Updated by Jim Pingle about 1 year ago

I also closed out #13877 and #13368 since they were all related. Testing one means the others are also working.

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