Bug 811049

Summary: openssl doesn't recognize google's CA.
Product: [Fedora] Fedora Reporter: Wolfgang Rupprecht <wolfgang.rupprecht>
Component: postfixAssignee: Jaroslav Škarvada <jskarvad>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: unspecified    
Version: 16CC: jskarvad, mlichvar, tmraz
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Hardware: x86_64   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2012-05-09 14:29:11 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
openssl s_client -connect gmail.com:443 none

Description Wolfgang Rupprecht 2012-04-10 00:33:55 UTC 
Description of problem:

openssl doesn't recognize google's CA.  Perhaps a problem with 2nd level CA's.


Version-Release number of selected component (if applicable):
openssl.x86_64                  1.0.0h-1.fc16                   @updates-testing
(previous versions did this too.  I updated in hopes that it was fixed in -testing.)

How reproducible:
always


Steps to Reproduce:
1. Install postfix and wait for email from gmail.com to come in.
2. look at /var/log/maillog and notice the gripes about the CA not being   recognized.
  
Actual results:

Apr  9 16:54:00 arbol postfix/smtpd[1611]: setting up TLS connection from mail-pb0-f70.google.com[209.85.160.70]
Apr  9 16:54:00 arbol postfix/smtpd[1611]: certificate verification failed for mail-pb0-f70.google.com[209.85.160.70]: untrusted issuer /C=US/O=Equifax/OU=Equifax Secure Certificate Authority
Apr  9 16:54:00 arbol postfix/smtpd[1611]: mail-pb0-f70.google.com[209.85.160.70]: Untrusted: subject_CN=smtp.gmail.com, issuer=Google Internet Authority, fingerprint=F3:92:AE:B4:28:FE:64:03:6F:E1:55:ED:71:9E:5F:F6:88:90:5A:57

Expected results:
The CA should have been trusted if the second-level CA was correctly checked.

Additional info:
The google CA is relatively unique in that it is a CA that has its CA certificate signed by a top-level CA instead of the more usual case where the top-level CA signs actual host/service certificates.
Comment 1 Wolfgang Rupprecht 2012-04-10 00:38:07 UTC 
Created attachment 576349 [details]
openssl s_client -connect gmail.com:443

notice that google's CA is a second-level CA signed by Thawte
Comment 2 Tomas Mraz 2012-05-04 15:38:18 UTC 
I am sorry but I do not see anything wrong with the way openssl handles second-level CAs.

Your openssl s_client testcase is connecting to a wrong host anyway. The correct one is:

openssl s_client -connect smtp.gmail.com:465

And its output correctly indicates that the verification of the certificate passed successfully. I suppose you have something wrong setup in the postfix in regards to the CA certificates.
Comment 3 Wolfgang Rupprecht 2012-05-04 17:11:47 UTC 
It may be a bug in postfix then.  Thanks for changing the component above.
Comment 4 Jaroslav Škarvada 2012-05-09 13:24:28 UTC 
What's your /etc/postfix/main.cf TLS settings? I guess you need there something like:
smtpd_tls_CAfile = /etc/pki/tls/cert.pem
Comment 5 Wolfgang Rupprecht 2012-05-09 14:14:12 UTC 
oops.  operator error.  I thought I'd used the big bundle from /etc/pki/tls/certs/ca-bundle.crt , but it appears not. I'd referenced a file that only had my personal CA in it.  Sorry for the noise.
Comment 6 Jaroslav Škarvada 2012-05-09 14:29:11 UTC 
Thanks for info, closing.