conf.d/main/03_exim4-config_tlsoptions

   1
   2 ### main/03_exim4-config_tlsoptions
   3 #################################
   4
   5 # TLS/SSL configuration.
   6 # See /usr/share/doc/exim4-base/README.Debian.gz for explanations.
   7
   8
   9 .ifdef MAIN_TLS_ENABLE
  10 # Defines what hosts to 'advertise' STARTTLS functionality to. The
  11 # default, *, will advertise to all hosts that connect with EHLO.
  12 .ifndef MAIN_TLS_ADVERTISE_HOSTS
  13 MAIN_TLS_ADVERTISE_HOSTS = *
  14 .endif
  15 tls_advertise_hosts = MAIN_TLS_ADVERTISE_HOSTS
  16
  17
  18 # Full paths to Certificate and Private Key. The Private Key file
  19 # must be kept 'secret' and should be owned by root.Debian-exim mode
  20 # 640 (-rw-r-----). exim-gencert takes care of these prerequisites.
  21 # Normally, exim4 looks for certificate and key in different files:
  22 #   MAIN_TLS_CERTIFICATE - path to certificate file,
  23 #                          CONFDIR/exim.crt if unset
  24 #   MAIN_TLS_PRIVATEKEY  - path to private key file
  25 #                          CONFDIR/exim.key if unset
  26 # You can also configure exim to look for certificate and key in the
  27 # same file, set MAIN_TLS_CERTKEY to that file to enable. This takes
  28 # precedence over all other settings regarding certificate and key file.
  29 .ifdef MAIN_TLS_CERTKEY
  30 tls_certificate = MAIN_TLS_CERTKEY
  31 .else
  32 .ifndef MAIN_TLS_CERTIFICATE
  33 MAIN_TLS_CERTIFICATE = CONFDIR/exim.crt
  34 .endif
  35 tls_certificate = MAIN_TLS_CERTIFICATE
  36
  37 .ifndef MAIN_TLS_PRIVATEKEY
  38 MAIN_TLS_PRIVATEKEY = CONFDIR/exim.key
  39 .endif
  40 tls_privatekey = MAIN_TLS_PRIVATEKEY
  41 .endif
  42
  43 # Pointer to the CA Certificates against which client certificates are
  44 # checked. This is controlled by the `tls_verify_hosts' and
  45 # `tls_try_verify_hosts' lists below.
  46 # If you want to check server certificates, you need to add an
  47 # tls_verify_certificates statement to the smtp transport.
  48 # /etc/ssl/certs/ca-certificates.crt is generated by
  49 # the "ca-certificates" package's update-ca-certificates(8) command.
  50 .ifndef MAIN_TLS_VERIFY_CERTIFICATES
  51 MAIN_TLS_VERIFY_CERTIFICATES = ${if exists{/etc/ssl/certs/ca-certificates.crt}\
  52                                     {/etc/ssl/certs/ca-certificates.crt}\
  53                                     {/dev/null}}
  54 .endif
  55 tls_verify_certificates = MAIN_TLS_VERIFY_CERTIFICATES
  56
  57
  58 # A list of hosts which are constrained by `tls_verify_certificates'. A host
  59 # that matches `tls_verify_host' must present a certificate that is
  60 # verifyable through `tls_verify_certificates' in order to be accepted as an
  61 # SMTP client. If it does not, the connection is aborted.
  62 .ifdef MAIN_TLS_VERIFY_HOSTS
  63 tls_verify_hosts = MAIN_TLS_VERIFY_HOSTS
  64 .endif
  65
  66 # A weaker form of checking: if a client matches `tls_try_verify_hosts' (but
  67 # not `tls_verify_hosts'), request a certificate and check it against
  68 # `tls_verify_certificates' but do not abort the connection if there is no
  69 # certificate or if the certificate presented does not match. (This
  70 # condition can be tested for in ACLs through `verify = certificate')
  71 .ifndef MAIN_TLS_TRY_VERIFY_HOSTS
  72 MAIN_TLS_TRY_VERIFY_HOSTS = *
  73 .endif
  74 tls_try_verify_hosts = MAIN_TLS_TRY_VERIFY_HOSTS
  75
  76 .endif