This issue was not selected to be included either in Red Hat Enterprise Linux 7.7 because it is seen either as low or moderate impact to a small amount of use-cases. The next release will be in Maintenance Support 1 Phase, which means that qualified Critical and Important Security errata advisories (RHSAs) and Urgent Priority Bug Fix errata advisories (RHBAs) may be released as they become available. We will now close this issue, but if you believe that it qualifies for the Maintenance Support 1 Phase, please re-open; otherwise we recommend moving the request to Red Hat Enterprise Linux 8 if applicable.

Hey Simo,

Reopening the Bugzilla. This is really important for customer, Since this is regression.

*********Other information***************
- customer using coolkey.

- Customer has tried using coolkey, but still issue persists.
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*******************Issue*******************
- When user tries sending E-Mail(after inserting CAC) they get Error 
    => Sending of Message Failed, You specified that this message should be digitally signed, but the application either failed to find the signing certificate specified in your Mail & Newsgroup Account Settings, or the certificate has expired.

- Workaround-1:
 -> Go to:
    Thunderbird Preferences > View Certificates.    //Now user is prompted for CAC PIN. 
    - After having done this, they will be able to send signed emails until they remove and reinsert their card 

- Workaround-2:
 -> I removed the cert8.db file from my Thunderbird profile and sending encrypted email works again. I still have the issue where Thunderbird does not prompt for the CAC PIN when I send a signed email

- RHEL-7.5(Thunderbird-52.9.1) does not shown the issue. 

- RHEL-7.6(Thunderbird-60.3.0) no longer prompts for PIN. 
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*****Why it's important for Customer*****
 While not a work stoppage, customers are frustrated by having to use the work-around many times per day.
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*******Customer Tests with switching to opensc**********
- When I change Thunderbird over to using OpenSC with the CAC in the SCR3310 reader, I get the same behavior that I was getting under CoolKey. Under the Security Devices... preferences panel I am unable to "Log In" to the CAC. When sending an email, Thunderbird reports the same error I was getting under CoolKey.
- If I downgrade Thunderbird to 52.9.1 then I am able to "Log In" to the CAC and send signed emails using OpenSC. This only works when the card is in the SCR3310 reader. It does not work from the Dell SmartCard Keyboard reader.
- I'm willing to do some troubleshooting of OpenSC if that will be the only supported Smart Card library under RHEL. It does present some problems. For instance, since switching to OpenSC, I cannot log into my workstation or unlock the screen
***************************************************


Regressions are important since they break exiting functionality.
Still if Business Justification is needed we can ask same from Customer.

Thunderbird 60.3.0 - has the issue
Thunderbird 60.2.1 - has the issue
Thunderbird 52.9.1 - works

Dear Jan,

Thanks for response. We have asked customer to try 60.6.1, But how this rules out nss possibility!

Issue can be with cert-check(may be involving hash checks of key on cert and generates cert using nss), But same issue may be with newer nss versions as well!

The listing is weird since it shows two slots for your CAC card, where should be only one. I assume the certificates are correctly visible in the following listings, but in any case for the reference, I would be interested in the output of the following commands:

pkcs11-tool -L
pkcs11-tool -O
modutil -dbdir /etc/pki/nssdb -list

On the OpenSC side from the logs, the CAC card is detected correctly, certificates retrieved, but after probing the slot list, there is no follow-up call to OpenSC from NSS and from Thunderbird.

I can also recommend trying different card reader, since the Dell one can be sometimes not very reliable, but if it worked before, it should continue to work.

Issue can also be reproduced with Thunderbird(60.6.1) from upstream, resulting in the same error.

From the error message it seems that certificate cannot be found or its verification fails. Along with Jakub suggestions please also attach ask customer to attach certverifier.log content obtained by:

MOZ_LOG="certverifier:5" thunderbird &> certverifier.log

From the TB 52 vs 60 sources, there's been some changes. Looks like this issue is already reported to upstream: https://bugzilla.mozilla.org/show_bug.cgi?id=1519093 I'm going to investigate further.

Customer's Update

**********Created By: Jason Fonseca  (5/8/2019 2:35 AM)*********
I installed the version of Thunderbird provided below.  I reverted OpenSC back to 0.16.0-10.  I started Thunderbird using the directions below.  In the Account Settings under Security, I selected the signing and encryption certificates.  I composted and successfully sent a signed email.  I pulled and reinserted the card.  I then sent another signed email and got the error.  The tb-debug-log will be attached.
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As customer already mentioned, this has been already fixed by 60.7.2-2.