[BUG] New-PnPAzureCertificate: Object reference not set to an instance of an object with Powershell 7.4.1

[OASISfr]

PnP.Powershell version : 2.3.0 / 2.4.0
OS : Windows 11
Powershell version : 7.4.1

Reporting Issue :

New-PnPAzureCertificate -OutPfx pnp.pfx -OutCert pnp.cer -CertificatePassword (ConvertTo-SecureString -String "pass@word1" -AsPlainText -Force)

Generate an error : Object reference not set to an instance of an object.

Commandlet is operational with Powershell 7.4.0

EDIT 14/03/2024 :
Powershell version IS NOT the problem.
The commandlet work with PnP.Powershell 2.2.0 / Powershell 7.4.1

Get-Error :

Exception :
Type : System.NullReferenceException
TargetSite :
Name : WriteAzureCertificateOutput
DeclaringType : PnP.PowerShell.Commands.Base.GetPnPAdalCertificate
MemberType : Method
Module : PnP.PowerShell.dll
Message : Object reference not set to an instance of an object.
Source : PnP.PowerShell
HResult : -2147467261
StackTrace :
at PnP.PowerShell.Commands.Base.GetPnPAdalCertificate.WriteAzureCertificateOutput(PSCmdlet cmdlet, X509Certificate2 certificate, SecureString password) in
c:\build\src\Commands\Base\GetAzureCertificate.cs:line 82
at PnP.PowerShell.Commands.Base.NewPnPAdalCertificate.ProcessRecord() in c:\build\src\Commands\Base\NewAzureCertificate.cs:line 104
at System.Management.Automation.CommandProcessor.ProcessRecord()
CategoryInfo : NotSpecified: (:) [New-PnPAzureCertificate], NullReferenceException
FullyQualifiedErrorId : System.NullReferenceException,PnP.PowerShell.Commands.Base.NewPnPAdalCertificate
InvocationInfo :
MyCommand : New-PnPAzureCertificate
ScriptLineNumber : 1
OffsetInLine : 2
HistoryId : 4
Line : New-PnPAzureCertificate -OutPfx pnp.pfx -OutCert pnp.cer -CertificatePassword (ConvertTo-SecureString -String "pass@word1" -AsPlainText -Force)
Statement : New-PnPAzureCertificate -OutPfx pnp.pfx -OutCert pnp.cer -CertificatePassword (ConvertTo-SecureString -String "pass@word1" -AsPlainText -Force)
PositionMessage : At line:1 char:2
+ New-PnPAzureCertificate -OutPfx pnp.pfx -OutCert pnp.cer -Certificat …
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
InvocationName : New-PnPAzureCertificate
CommandOrigin : Internal
ScriptStackTrace : at , : line 1

[jackpoz]

Cannot reproduce the issue using v2.4.8 on Windows 10

Did the command create the pfx and cer files ? According to the stacktrace you posted, it failed when showing the certificate in the console but after it got created.

[OASISfr]

Hello.

I'am disapointed to see my bug turn in discussion !!

Yes, the command create the file.

[jackpoz]

Could you please create a brand new certificate pair and upload both pfx and cer ? Make sure not to use it anywhere.
The code

powershell/src/Commands/Base/GetAzureCertificate.cs

Lines 89 to 95 in e25326f

	certificate: CertificateHelper.CertificateToBase64(certificate),
	privateKey: CertificateHelper.PrivateKeyToBase64(certificate),
	sanNames: certificate.Extensions.Cast<X509Extension>()
	.Where(n => n.Oid.FriendlyName=="Subject Alternative Name")
	.Select(n => new AsnEncodedData(n.Oid, n.RawData))
	.Select(n => n.Format(false))
	.FirstOrDefault().Split(',', StringSplitOptions.TrimEntries)

does a few things and any of them could cause the NullReferenceException exception. 11d195b added some extra code related to San names, which is what most likely is causing the issue in the 2.3.0+ versions