[openssl-users] How to prove a Certificate is Signed or not

[Felipe Gasper]

You could:

- Check subject and issuer for sameness.
- Verify the signature with the certificate’s own key. A positive verification indicates self-signed.

> On May 3, 2018, at 7:18 AM, Salz, Rich via openssl-users <openssl-users at openssl.org> wrote:
> 
> 
> 
> On 5/3/18, 4:24 AM, "morthalan" <morthalaanilreddy at gmail.com> wrote:
> 
>    No, technically not. I am just searching for a simple method just to check a
>    certificate is signed by CA or not. 
>    Because. Something like signing check, I am not quite sure, I do not have
>    proper knowledge on Openssl.
> 
> 
> If you have a cert, and a list of CA's that you trust, look at the verify command.
> 
> 
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