How to get a security hash algorithm for a certificate using Powershell

Question

I need to get a list of all the certificates with a particular hash algorithm.

First I tried retrieving SignatureAlgorithm as follows:

Get-ChildItem -Recurse | select thumbprint, subject, SignatureAlgorithm

Which gave me System.Security.Cryptography.Oid as a value of SignatureAlgorithm column

I tried using FriendlyName

Get-ChildItem -Recurse | select thumbprint, subject, SignatureAlgorithm.FriendlyName

But the above returned blank as a value for SignatureAlgorithm

How can I retrieve the readable value of SignatureAlgorithm? And also how do I select all the SHA1 certificates using Powershell?

Frode F. · Accepted Answer · 2016-09-07 16:07:05Z

7

Select-Object are expecting names for the properties to show (since you didn't specify a parameter, you're using the 1st pos. which is -Property). There are no properties called SignatureAlgorithm.FriendlyName.

If you use a calculated property, you can design your own property where the value is the property FriendlyName inside the object's SignatureAlgorithm-property. Ex:

Get-ChildItem -Recurse | select thumbprint, subject, @{n="SignatureAlgorithm";e={$_.SignatureAlgorithm.FriendlyName}}

(n is short for name (could also use l or label) and e is short for expression)

answered Sep 7, 2016 at 16:07

Frode F.

55.4k9 gold badges104 silver badges118 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Coding Duchess Over a year ago

Thanks! How do I do that in where clause to select only those certs that have sha1 algorithm?

Frode F. Over a year ago

Filter on those with a signaturealgorithm-value. .. | where-object { $_.SignatureAlgorithm } | select....

Collectives™ on Stack Overflow

How to get a security hash algorithm for a certificate using Powershell

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related