我将使用一个小的辅助函数来从X500DistinghuishedName中解析发行者名称：

function Get-IssuerName([string]$IssuerDN) {
    # helper function to parse the name out of the X500DistinghuishedName formatted 'Issuer' string
    if ($IssuerDN -match 'O=([^,]+)') { $matches[1] }
    elseif ($IssuerDN -match 'CN=([^,]+)')  { $matches[1] }
    else { $IssuerDN }
}

然后，在您的Select语句中使用它，如下所示：

Select-Object -Property Path,Status,@{Name='SubjectName';Expression={(Get-IssuerName $_.SignerCertificate.Subject)}}

在计算所得的属性中删除主题中不需要的部分：

@{n='SubjectName',e={$_.SignerCertificate.Subject -replace ',.*' -replace '^CN='}}

总结：

1. 使用function Get-IssuerName
2. 使用Get-IssuerName语句中的Select-Object执行脚本行
3. 将输出放入Export-Csv

这是脚本：

function Get-IssuerName([string]$IssuerDN) {
    # helper function to parse the name out of the X500DistinghuishedName formatted 'Issuer' string
    if ($IssuerDN -match 'O=([^,]+)')  { $matches[1] }
    else { $IssuerDN }
}

Get-ChildItem -File -Path "C:\Program Files (x86)\My Company\My Product\Components\Microsoft.*.dll" -Recurse |
    Get-AuthenticodeSignature |
    Select-Object -Property Path,@{Name='SubjectName';Expression={(Get-IssuerName $_.SignerCertificate.Subject)}} |
        Export-Csv -Path d:\temp\AuthenticodeSignature.csv -NoTypeInformation

以及生成的CSV输出：

"Path","Status","SubjectName"
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.Expression.Drawing.dll","NotSigned",""
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.Expression.Interactions.dll",""
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.ReportViewer.Common.dll","Valid","Microsoft Corporation"
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.ReportViewer.DataVisualization.dll","Microsoft Corporation"
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.ReportViewer.ProcessingObjectModel.dll","Microsoft Corporation"
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.ReportViewer.WinForms.dll","Microsoft Corporation"
"C:\Program Files (x86)\My Company\My Product\Components\Microsoft.SqlServer.Types.dll","Microsoft Corporation"

Voilà！非常感谢@“ Ansgar Wiechers”和@Theo