jsonpowershellpsobject

How do I get the length of a PSCustom object?

The following is stored in powershell 

#Maintainer Note: The leftmost parameter must match the registry key name exactly e.g. 'DES 56'
#For more information please check https://support.microsoft.com/en-us/kb/245030
$bannedCiphersJSON = @"
   {
    "RC4 128/128":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_WITH_RC4_128_MD5",
                        "SSL_RSA_WITH_RC4_128_SHA",
                        "TLS_RSA_WITH_RC4_128_MD5",
                        "TLS_RSA_WITH_RC4_128_SHA"
        ]
    },

    "Triple DES 168":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_WITH_3DES_EDE_CBC_SHA",
                        "SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA" ,
                        "TLS_RSA_WITH_3DES_EDE_CBC_SHA" ,
                        "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA"
        ]
    },

    "RC4 56/128":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "TLS_RSA_EXPORT1024_WITH_RC4_56_SHA"
        ]
    },

    "DES 56":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_WITH_DES_CBC_SHA"
        ]
    },

    "RC4 40/128":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_EXPORT_WITH_RC4_40_MD5",
                        "TLS_RSA_EXPORT_WITH_RC4_40_MD5"
        ]
    },

    "RC2 40/128":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5",
                        "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5"
        ]
    },

    "MD5":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_EXPORT_WITH_RC4_40_MD5",
                        "SSL_RSA_WITH_RC4_128_MD5",
                        "SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5",
                        "TLS_RSA_EXPORT_WITH_RC4_40_MD5",
                        "TLS_RSA_WITH_RC4_128_MD5",
                        "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5"
        ]
    },

    "SHA":{
        "IsPermitted":false,
        "AffectedCiphers":[
                        "SSL_RSA_WITH_RC4_128_SHA",
                        "SSL_RSA_WITH_DES_CBC_SHA",
                        "SSL_RSA_WITH_3DES_EDE_CBC_SHA",
                        "SSL_RSA_EXPORT1024_WITH_DES_CBC_SHA",
                        "SSL_RSA_EXPORT1024_WITH_RC4_56_SHA",
                        "TLS_RSA_WITH_RC4_128_SHA",
                        "TLS_RSA_WITH_DES_CBC_SHA",
                        "TLS_RSA_WITH_3DES_EDE_CBC_SHA",
                        "TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA",
                        "TLS_RSA_EXPORT1024_WITH_RC4_56_SHA"
        ]
    }
}
"@

$bannedCiphers =$bannedCiphersJSON  | ConvertFrom-Json

function Get-TLSProtocol{ 

    For ($i=0; $i -lt $bannedCiphers.Count; $i++)
    {

      write-output  $i 
    }
}

Get-TLSProtocol

When I run a Get-Member against the object, each object seems to be a "note property". Because of this I think the array definition isn't correct. (my goal is to get a list of objects that I can use to inspect the registry. 

PS C:\users\golden> $bannedCiphers | get-member


   TypeName: System.Management.Automation.PSCustomObject

Name           MemberType   Definition
----           ----------   ----------
Equals         Method       bool Equals(System.Object obj)
GetHashCode    Method       int GetHashCode()
GetType        Method       type GetType()
ToString       Method       string ToString()
DES 56         NoteProperty System.Management.Automation.PSCustomObject DES 56=@{IsPermitted=False; AffectedCiphers=...
MD5            NoteProperty System.Management.Automation.PSCustomObject MD5=@{IsPermitted=False; AffectedCiphers=Sys...
RC2 40/128     NoteProperty System.Management.Automation.PSCustomObject RC2 40/128=@{IsPermitted=False; AffectedCiph...
RC4 128/128    NoteProperty System.Management.Automation.PSCustomObject RC4 128/128=@{IsPermitted=False; AffectedCip...
RC4 40/128     NoteProperty System.Management.Automation.PSCustomObject RC4 40/128=@{IsPermitted=False; AffectedCiph...
RC4 56/128     NoteProperty System.Management.Automation.PSCustomObject RC4 56/128=@{IsPermitted=False; AffectedCiph...
SHA            NoteProperty System.Management.Automation.PSCustomObject SHA=@{IsPermitted=False; AffectedCiphers=Sys...
Triple DES 168 NoteProperty System.Management.Automation.PSCustomObject Triple DES 168=@{IsPermitted=False; Affected...

What is the correct way to define an object within powershell so that I can iterate over the top most layer?

Solution

  • you have a PSCustomObject, not an array. that object has some arrays buried in the properties, tho. [grin] here's one way to get the list & the count ... 

    $AffectedCiphers = foreach ($PropName in $Test.PSObject.Properties.Name)
    {
    $Test.$PropName.AffectedCiphers
    }

'There are {0} ciphers in the Banned Ciphers list.' -f $AffectedCiphers.Count

    output:

    There are 30 ciphers in the Banned Ciphers list.

    what the above does:

    hope that helps,
    lee