[stunnel-users] is verify level 4 working?

Mon Jul 8 23:44:07 CEST 2013

dansmith,

It's my understanding that verify = 4 should, theoretically, look only
for the server certificate, and this is the way I've been using it with 
great success over the past year or so.  Recently, however, I ran into 
an exception to that behavior.

In my case, I only had to download and install one certificate; that of 
the signing CA.  I simply pasted it directly below the server 
certificate in the associated .pem file.  The CA certificate wasn't 
originally in .pem format, so I converted it beforehand.  OpenSSL has 
conversion capability, and there are also online certificate tools 
available.  Your mileage may vary.

Good luck.

Thomas

On 7/8/2013 3:01 PM, dansmith wrote:

 > Could you kindly break it down for me. Are you saying that I need to
 > have two CAs A & B. A signs the certificate of B and B signs the
 > certificate of my server?
 > Do I understand correctly that verify=4 is supposed to simply ignore any
 > CAs and only look at the actual certificate, comparing it to the
 > certificate in CAfile ?
 >
 >
 > On 07/08/2013 06:32 PM, Thomas Eifert wrote:
 >> You're not missing anything.  I've experienced a similar issue.  While
 >> verify = 4 generally works well in most cases and will ignore the CA
 >> chain, I've encountered a few isolated incidences in which I've had to
 >> append or "chain" the server certificate with the certificate of the
 >> CA. Give it a shot and see if it resolves your issue.
 >>
 >> Thomas
 >>
 >> On 7/8/2013 3:02 AM, dansmith wrote:
 >>> I would expect that level 4 only compares locally installed
 >>> certificates, however I get the same behaviour as with level 3, stunnel
 >>> expects a CA cert.
 >>> Here'e the relevant log when on level 4
 >>>
 >>> Jul  6 23:46:31 mmm stunnel: LOG7[7870:140491349628672]: Starting
 >>> certificate verification: depth=0,
 >>> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd
 >>> Jul  6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: CERT:
 >>> Verification error: unable to get local issuer certificate
 >>> Jul  6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: Certificate
 >>> check failed: depth=0, 
/C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd
 >>> Jul  6 23:46:31 mmm stunnel: LOG7[7872:140080853112576]: SSL alert
 >>> (read): fatal: unknown CA
 >>>
 >>> What am I missing in understanding verify's level 4 ?
 >>>
 >>>
 >>>
 >>>
 >>> _______________________________________________
 >>> stunnel-users mailing list
 >>> stunnel-users at stunnel.org
 >>> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users
 >>>
 >>
 >
 >

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