Dovecot & OAuth
Aki Tuomi
aki.tuomi at open-xchange.com
Thu Dec 5 22:06:37 EET 2019
Before declaring it not ready for prime time, did you try setting
tls_ca_cert_file = /etc/ssl/certs/ca-certificates.crt
In the oauth2 configuration file as documented in https://doc.dovecot.org/configuration_manual/authentication/oauth2 ?
Aki
> On 05/12/2019 21:58 mizuki via dovecot <dovecot at dovecot.org> wrote:
>
>
> Hi all,
>
> We'd like to enable OAuth with Keycloak in Dovecot, after enabling 'OAUTHBEARER XOAUTH2' in Dovecot based on online document, I can confirm Dovecot is ready for OAuth using openssl command, however when the auth request comes in, it failed in establishing a SSL connection with Keycloak server on port 443, shown as following in debug logs. I can confirming using commands 'openssl s_client -connect <keycloak_server>:443' or 'curl -v https://<keycloak_server/' all returns normal and no errors. Altering some of the SSL options in dovecot such as 'ssl_ca = </etc/pki/CA/certs/root_ca.pem' or 'ssl_client_ca_file = </etc/pki/CA/certs/root_ca.pem' does not help either. The certificate are NOT self-signed but signed the legit authorities. So I'm not sure why dovecot could not establish the connections.
>
> Debug logs:
> ----------------------------------------------------
> Dec 5 14:32:07 mktst4 dovecot: auth: Debug: auth client connected (pid=16554)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: client in: AUTH#0111#011OAUTHBEARER#011service=imap#011secured#011session=QPwA/fmY+tqCx5Tr#011lip=130.199.148.187#011rip=10.0.2.1#011lport=993#011rport=56058#011resp=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 (previous base64 data may contain sensitive data)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: host example.com (http://example.com): Host created
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: host example.com (http://example.com): Performing asynchronous DNS lookup
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: request [Req1: GET https://example.com/auth/realms/mail/protocol/openid-connect/tokeneyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJrdGxNSHVmbG54VTRiRGZKNndHdmxPMUV1YlVwakxFUVhHcnFMNTc3aHBRIn0.eyJqdGkiOiI4NWJlYWNmNC1jMmNlLTRmNDItYmQ4MS01NzViN2FjYWNlOTgiLCJleHAiOjE1NzU2MTAyMDgsIm5iZiI6MCwiaWF0IjoxNTc1NTc0MjA4LCJpc3MiOiJodHRwczovL2tleWNsb2FrMi5zZGNjLmJubC5nb3YvYXV0aC9yZWFsbXMvbWFpbCIsImF1ZCI6ImFjY291bnQiLCJzdWIiOiI2NjVkNDU3My04YWE1LTRkODYtYmMzZi0yZTJjMjNiMzY2NDUiLCJ0eXAiOiJCZWFyZXIiLCJhenAiOiJkb3ZlY290IiwiYXV0aF90aW1lIjowLCJzZXNzaW9uX3N0YXRlIjoiOTM4NWE5NjAtMDNkZC00OGNlLWEyN2QtYTY3ZGY0NmQxZDg1IiwiYWNyIjoiMSIsInJlYWxtX2FjY2VzcyI6eyJyb2xlcyI6WyJvZmZsaW5lX2FjY2VzcyIsInVtYV9hdXRob3JpemF0aW9uIl19LCJyZXNvdXJjZV9hY2Nlc3MiOnsiYWNjb3VudCI6eyJyb2xlcyI6WyJtYW5hZ2UtYWNjb3VudCIsIm1hbmFnZS1hY2NvdW50LWxpbmtzIiwidmlldy1wcm9maWxlIl19fSwic2NvcGUiOiJwcm9maWxlIGVtYWlsIiwiZW1haWxfdmVyaWZpZWQiOmZhbHNlLCJuYW1lIjoiTWl6dWtpIEthcmFzYXdhIiwicHJlZmVycmVkX3VzZXJuYW1lIjoibWl6dWtpIiwiZ2l2ZW5fbmFtZSI6Ik1penVraSIsImZhbWlseV9uYW1lIjoiS2FyYXNhd2EiLCJlbWFpbCI6Im1penVraUBibmwuZ292In0.Me4p6ItvlvOEXE213jpJrikqadcYoFl2yLVRsA2oA7fX8-xKIa4vrFfjl0-tpobhw22FpoT6vMj1mza-pVYLs5mo3L9cLJOhUVuvNoXJngfTs-y6MlnMuFWSPzkbtHa9rSPEjdaYApCBNv0oBXK6nhH3E9fCoN_SBU2qlZIi63WV9FWJ1kluFOb0sLckb_XcFg8TgGW8GURTXNX8mmU3WM-byvrnNAr6acYmbmtZW4aWCpNNEHtYSoKJh2tvnB8G6yyyjmYbyCfaNl0JuYaNvTQ3MxB_ag-_Os-8VL-LaKtpFapL4EMYBZ_1gfcaHWTIEuU-0IWcN9DklqqmL7_c6Q]: Submitted
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: host example.com (http://example.com): DNS lookup successful; got 1 IPs
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: peer 10.0.2.2:443 (http://10.0.2.2:443): Peer created
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: queue https://example.com"443: Setting up connection to 10.0.2.2:443 (http://10.0.2.2:443) (SSL=example.com (http://example.com)) (1 requests pending)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: peer 10.0.2.2:443 (http://10.0.2.2:443): Linked queue https://example.com:443 (1 queues linked)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: queue https://example.com:443: Started new connection to 10.0.2.2:443 (http://10.0.2.2:443) (SSL=example.com (http://example.com))
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: peer 10.0.2.2:443 (http://10.0.2.2:443): Creating 1 new connections to handle requests (already 0 usable, connecting to 0, closing 0)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: peer 10.0.2.2:443 (http://10.0.2.2:443): Making new connection 1 of 1
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: HTTPS connection created (1 parallel connections exist)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: Connected
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: Starting SSL handshake
> Dec 5 14:32:22 mktst4 dovecot: auth: Received invalid SSL certificate: unable to get issuer certificate: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Certification Authority
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: peer 10.0.2.2:443 (http://10.0.2.2:443): Failed to make connection (connections=1, connecting=1)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: queue https://example.com:443: Failed to set up connection to 10.0.2.2:443 (http://10.0.2.2:443) (SSL=example.com (http://example.com)): SSL handshaking with 10.0.2.2:443 (http://10.0.2.2:443) failed: read(SSL 10.0.2.2:443 (http://10.0.2.2:443)) failed: Received invalid SSL certificate: unable to get issuer certificate: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Certification Authority (1 peers pending, 1 requests pending)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: queue https://example.com:443: Failed to set up any connection; failing all queued requests
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: peer 10.0.2.2:443 (http://10.0.2.2:443): Unlinked queue https://example.com:443 (0 queues linked)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: queue https://example.com:443: Dropping request [Req1: GET https://example.com/auth/realms/mail/protocol/openid-connect/tokeneyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJrdGxNSHVmbG54VTRiRGZKNndHdmxPMUV1YlVwakxFUVhHcnFMNTc3aHBRIn0.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.Me4p6ItvlvOEXE213jpJrikqadcYoFl2yLVRsA2oA7fX8-xKIa4vrFfjl0-tpobhw22FpoT6vMj1mza-pVYLs5mo3L9cLJOhUVuvNoXJngfTs-y6MlnMuFWSPzkbtHa9rSPEjdaYApCBNv0oBXK6nhH3E9fCoN_SBU2qlZIi63WV9FWJ1kluFOb0sLckb_XcFg8TgGW8GURTXNX8mmU3WM-byvrnNAr6acYmbmtZW4aWCpNNEHtYSoKJh2tvnB8G6yyyjmYbyCfaNl0JuYaNvTQ3MxB_ag-_Os-8VL-LaKtpFapL4EMYBZ_1gfcaHWTIEuU-0IWcN9DklqqmL7_c6Q]
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: host example.com (http://example.com): Host is idle (timeout = 1799992 msecs)
> Dec 5 14:32:22 mktst4 dovecot: auth: Error: oauth2(mizuki,10.0.2.1,<QPwA/fmY+tqCx5Tr>): oauth2 failed: SSL handshaking with 10.0.2.2:443 (http://10.0.2.2:443) failed: read(SSL 10.0.2.2:443 (http://10.0.2.2:443)) failed: Received invalid SSL certificate: unable to get issuer certificate: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Certification Authority
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: request [Req1: GET https://example.com/auth/realms/mail/protocol/openid-connect/tokeneyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJrdGxNSHVmbG54VTRiRGZKNndHdmxPMUV1YlVwakxFUVhHcnFMNTc3aHBRIn0.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.Me4p6ItvlvOEXE213jpJrikqadcYoFl2yLVRsA2oA7fX8-xKIa4vrFfjl0-tpobhw22FpoT6vMj1mza-pVYLs5mo3L9cLJOhUVuvNoXJngfTs-y6MlnMuFWSPzkbtHa9rSPEjdaYApCBNv0oBXK6nhH3E9fCoN_SBU2qlZIi63WV9FWJ1kluFOb0sLckb_XcFg8TgGW8GURTXNX8mmU3WM-byvrnNAr6acYmbmtZW4aWCpNNEHtYSoKJh2tvnB8G6yyyjmYbyCfaNl0JuYaNvTQ3MxB_ag-_Os-8VL-LaKtpFapL4EMYBZ_1gfcaHWTIEuU-0IWcN9DklqqmL7_c6Q]: Destroy (requests left=1)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: request [Req1: GET https://example.com/auth/realms/mail/protocol/openid-connect/tokeneyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJrdGxNSHVmbG54VTRiRGZKNndHdmxPMUV1YlVwakxFUVhHcnFMNTc3aHBRIn0.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.Me4p6ItvlvOEXE213jpJrikqadcYoFl2yLVRsA2oA7fX8-xKIa4vrFfjl0-tpobhw22FpoT6vMj1mza-pVYLs5mo3L9cLJOhUVuvNoXJngfTs-y6MlnMuFWSPzkbtHa9rSPEjdaYApCBNv0oBXK6nhH3E9fCoN_SBU2qlZIi63WV9FWJ1kluFOb0sLckb_XcFg8TgGW8GURTXNX8mmU3WM-byvrnNAr6acYmbmtZW4aWCpNNEHtYSoKJh2tvnB8G6yyyjmYbyCfaNl0JuYaNvTQ3MxB_ag-_Os-8VL-LaKtpFapL4EMYBZ_1gfcaHWTIEuU-0IWcN9DklqqmL7_c6Q]: Free (requests left=0)
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: SSL handshaking with 10.0.2.2:443 (http://10.0.2.2:443) failed: read(SSL 10.0.2.2:443 (http://10.0.2.2:443)) failed: Received invalid SSL certificate: unable to get issuer certificate: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Certification Authority
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: Connection close
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: Connection disconnect
> Dec 5 14:32:22 mktst4 dovecot: auth: Debug: http-client: conn 10.0.2.2:443 (http://10.0.2.2:443) [0]: Connection destroy
> ----------------------------------------------------
>
> #dovecot -n
> ----------------------------------------------------
> # 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
> # OS: Linux 3.10.0-1062.4.3.el7.x86_64 x86_64 Red Hat Enterprise Linux Server release 7.7 (Maipo)
> # Hostname: mktst4.sdcc.bnl.gov (http://mktst4.sdcc.bnl.gov)
> auth_debug = yes
> auth_debug_passwords = yes
> auth_mechanisms = oauthbearer xoauth2
> auth_verbose = yes
> auth_verbose_passwords = yes
> first_valid_uid = 1000
> mail_debug = yes
> mail_location = maildir:~/Maildir
> mbox_write_locks = fcntl
> namespace inbox {
> inbox = yes
> location =
> mailbox Drafts {
> special_use = \Drafts
> }
> mailbox Junk {
> special_use = \Junk
> }
> mailbox Sent {
> special_use = \Sent
> }
> mailbox "Sent Messages" {
> special_use = \Sent
> }
> mailbox Trash {
> special_use = \Trash
> }
> prefix =
> }
> passdb {
> args = /etc/dovecot/dovecot-oauth2.conf.ext
> driver = oauth2
> mechanisms = oauthbearer xoauth2
> }
> protocols = imap
> service auth {
> unix_listener /var/spool/postfix/private/auth {
> group = postfix
> mode = 0666
> user = postfix
> }
> }
> ssl = required
> ssl_ca = </etc/pki/CA/certs/2.pem
> ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
> ssl_cipher_list = ECDH+AESGCM:ECDH+CHACHA20:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:!aNULL:!MD5:!DSS:!RSA
> ssl_client_ca_file = </etc/pki/CA/certs/2.pem
> ssl_key = # hidden, use -P to show it
> ssl_prefer_server_ciphers = yes
> ssl_require_crl = no
> userdb {
> args = uid=vmail gid=vmail home=/var/vmail/%u
> driver = static
> }
> ----------------------------------------------------
>
> # cat /etc/dovecot/conf.d/auth-oauth2.conf.ext
> ----------------------------------------------------
> passdb {
> driver = oauth2
> mechanisms = oauthbearer xoauth2
> args = /etc/dovecot/dovecot-oauth2.conf.ext
> }
>
> userdb {
> driver = static
> args = uid=vmail gid=vmail home=/var/vmail/%u
> }
> ----------------------------------------------------
>
> I wonder if anyone has experienced this possibly know what's going on.
> Thanks!
> Mizuki
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