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javakeytool
Michael
Michael

Reputation: 10329

How to see a certificate keysize using keytool?

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

Was not able to find it here: https://docs.oracle.com/javase/8/docs/technotes/tools/unix/keytool.html#keytool_option_list

Upvotes: 11

Views: 8987

Answers (2)

Nancy Forbes
Nancy Forbes

Reputation: 21

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

Upvotes: 2

Omikron
Omikron

Reputation: 4143

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

KeyStore Explorer

Upvotes: 11

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