How to get all certs into a .der file.

Fri May 22 21:56:10 UTC 2020

On Fri, May 22, 2020 at 04:31:02PM -0500, Kyle Hamilton wrote:

> application/pkix-pkipath
> Defined in RFC4366 (section 8) and RFC6066 (section 10.1)
> 
> PkiPath ::= SEQUENCE OF Certificate
> 
> Within the sequence, the order of certificates is such that the subject of
> the first certificate is the issuer of the second certificate, etc.

One can also use PKCS#7 (Microsft uses the .SPC file extension):

    $ openssl crl2pkcs7 -nocrl -certfile certs.pem -outform DER

That's perhaps more likely to be what the OP wants, if indeed he wants a
commonly used DER-form multi-cert (no keys) object:

    https://www.file-extensions.org/spc-file-extension-pkcs-7-certificate

-- 
    Viktor.