How to see a certificate keysize using keytool?

Question

When the certificate is created it is possible to configure -keysize option for command genkeypair.

Is it possible to see a certificate keysize using keytool?

I have tried these options without success:

keytool  -list –rfc

keytool  -list –v

"size"? Please elaborate. – Boris the Spider Nov 02 '15 at 11:18 — Boris the Spider, Nov 02 '15 at 11:18

Omikron · Accepted Answer · 2017-05-08T00:10:59.477

11

This is not possible with keytool, but there is a GUI alternative called "KeyStore Explorer" that shows the key size:

edited May 08 '17 at 00:10

answered Nov 02 '15 at 14:50

Omikron

score 2 · Answer 2 · edited Jan 07 '21 at 07:14

2

Actually, if I run the following command I will see the bit size listed under my Alias

keytool -list -v -keystore {name of keystore}

The following are lines I see on my private certificate (non-root cert)

Subject Public Key Algorithm: 2048-bit RSA key

edited Jan 07 '21 at 07:14

DanielM

answered Jan 06 '21 at 17:14

Nancy Forbes

2 Answers2