Indeed, I forgot to mention that if you only use the public part in the cert parameter, you need to use the key parameter to provide the private part of the certificate. Here is a sample of a configuration that I use in production
[Client]
client = yes
accept = …..
connect = …...
CAfile = keys/client/ca-chain-client.cert.pem # --> Contains the server leaf public part, the intermediate CA public part and the root CA public part
cert = keys/client/public.pem # --> public part of the client leaf certificate
key = keys/client/private.key # --> private part of the client leaf certificate
checkHost = xxxx # --> verify the Common Name provided in the server certificate
[Server]
CAfile = keys/server/ca-chain-server.cert.pem # --> Contains the client leaf public part, the intermediate CA public part and the root CA public part
cert = keys/server/public.pem
key = keys/server/private.key
client = no
accept = …..
connect = …..
As stated before, I also use the verifyPeer and verifyChain parameters in the main stunnel.conf file to enable mutual authentication.
Best regards,
Florian Stosse
Information security engineer
Safran Electronics & Defense | Safran Data Systems | Space & Communication
Phone: +33 1 69 82 79 43 • Mobile : +33 6 48 11 16 12
Safran Data Systems
5, avenue des Andes - CS 90101
91978 Courtaboeuf Cedex, France
www.safran-electronics-defense.com
De : Giulio Regazzo [mailto:capireg@gmail.com] Envoyé : lundi 16 novembre 2020 10:08 À : STOSSE Florian (SAFRAN ELECTRONICS & DEFENSE) Cc : stunnel-users@stunnel.org Objet : Re: [stunnel-users] PSK Configuration
Hi,
using only the public part as cert option in client side results in a load error. Seems that, loading the configuration, stunnel checks the presence of both certificate parts and also that public and private parts are compatible.
The other option you are suggesting is something like the following?
[Server]
cert=wholeCert.pem
verifyChain=yes
CAFile=publicCert.pem
[Client]
verifyChain=yes
CAFile=publicCert.pem
Il giorno lun 16 nov 2020 alle ore 09:49 STOSSE Florian (SAFRAN ELECTRONICS & DEFENSE) florian.stosse@safrangroup.com ha scritto:
Hello,
Have you tried using only the public part of the CA chain in the “cert=” parameter, client-side ?
Your second option would look like this:
[Server]
cert=wholeCert.pem
verifyPeer=yes
[Client]
verifyPeer=yes
cert=publicCert.pem
CAFile=publicCert.pem
Additionally, if you use the whole chain (Root + Intermediate + … + Leaf certs), you can specifiy a CAFile parameter server-side, and enable the verifyChain parameter on both sides.
Best regards,
Florian Stosse
Information security engineer
Safran Electronics & Defense | Safran Data Systems | Space & Communication
Phone: +33 1 69 82 79 43 • Mobile : +33 6 48 11 16 12
Safran Data Systems
5, avenue des Andes - CS 90101
91978 Courtaboeuf Cedex, France
www.safran-electronics-defense.com
De : Giulio Regazzo [mailto:capireg@gmail.com] Envoyé : lundi 16 novembre 2020 09:29 À : stunnel-users@stunnel.org Objet : [stunnel-users] PSK Configuration
Hi, I'm new to stunnel. And I'm trying to configure a server that accepts TCP sockets connections only from clients that have a pre-shared certificate.
Looking at the online documentation I found the verifyPeer option, but it is described to be used on client side. Trying to use it on server side I achieved my goal but only if the client has the whole certificate (private + public).
My question is: Can I obtain in some way the same result sharing only the public part of the certificate?
Currently I'm using a configuration like this one (skipping the accept and connect options):
[Server]
cert=wholeCert.pem
verifyPeer=yes
[Client]
cert=wholeCert.pem
verifyPeer=yes
CAFile=wholeCert.pem
and I'm looking for something like:
[Server]
cert=wholeCert.pem
verifyPeer=yes
[Client]
verifyPeer=yes
CAFile=publicCert.pem
If I try this second option the server refuses the connection in handshake phase saying that the client didn't provide any certificate.
Is there a way to achieve this?
Thank you.
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