Hoi Hans,

On 26/04/19 17:08, j.witvl...@mindef.nl wrote:

Hi all,

With the “ca” parameter, you should provide the full trust-chain of the ca’s and sub0ca that signed the used certificate.

And, as far as I can remember, you can concatenate multiple (pem-formatted) chains into one file.

correct , at least for the openssl-linked version of OpenVPN

Is there a limit on the length, or on the number of certificates, or on the number of trust-chains ?

not really, AFAIK. I'd have to look through the OpenSSL source code to see if there is an actual limit

I currently have 22 CA-certificates yielding a file of 46K.  Is that too much ??

46 K should be fine. However, you can try to reduce it by only including the BEGIN CERTIFICATE/END CERTIFICATE blobs, the rest is fluff. Most certificate blobs are about 1.5 KB in size, so you might be able to reduce it to about 33 KB


HTH / groetjes,

JJK


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