# Exim test configuration 2033
# TLS client: verify certificate from server - name-fails

SERVER=

exim_path = EXIM_PATH
host_lookup_order = bydns
primary_hostname = myhost.test.ex
spool_directory = DIR/spool
log_file_path = DIR/spool/log/SERVER%slog
gecos_pattern = ""
gecos_name = CALLER_NAME

FX = DIR/aux-fixed
S1 = FX/exim-ca/example.com/server1.example.com

CA1 =   S1/ca_chain.pem 
CERT1 = S1/server1.example.com.pem
KEY1 =  S1/server1.example.com.unlocked.key
CA2 =   FX/cert2
CERT2 = FX/cert2
KEY2 =  FX/cert2

# ----- Main settings -----

acl_smtp_rcpt = accept

log_selector =  +tls_peerdn+tls_certificate_verified

queue_only
queue_run_in_order

tls_advertise_hosts = *

# Set certificate only if server

tls_certificate = ${if eq {SERVER}{server}{CERT1}fail}
tls_privatekey = ${if eq {SERVER}{server}{KEY1}fail}

tls_verify_hosts = *
tls_verify_certificates = ${if eq {SERVER}{server}{CERT2}fail}


# ----- Routers -----

begin routers

server_dump:
  driver = redirect
  condition = ${if eq {SERVER}{server}{yes}{no}}
  data = :blackhole:

client_x:
  driver = accept
  local_parts = userx
  retry_use_local_part
  transport = send_to_server_failcert
  errors_to = ""

client_y:
  driver = accept
  local_parts = usery
  retry_use_local_part
  transport = send_to_server_retry

client_z:
  driver = accept
  local_parts = userz
  retry_use_local_part
  transport = send_to_server_crypt

client_q:
  driver = accept
  local_parts = userq
  retry_use_local_part
  transport = send_to_server_req_fail

client_r:
  driver = accept
  local_parts = userr
  retry_use_local_part
  transport = send_to_server_req_failname

client_s:
  driver = accept
  local_parts = users
  retry_use_local_part
  transport = send_to_server_req_passname

client_t:
  driver = accept
  local_parts = usert
  retry_use_local_part
  transport = send_to_server_req_failcarryon

# ----- Transports -----

begin transports

# this will fail to verify the cert at HOSTIPV4 so fail the crypt requirement
send_to_server_failcert:
  driver = smtp
  allow_localhost
  hosts = HOSTIPV4
  hosts_require_tls = HOSTIPV4
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = CA2

# this will fail to verify the cert at HOSTIPV4 so fail the crypt, then retry on 127.1; ok
send_to_server_retry:
  driver = smtp
  allow_localhost
  hosts = HOSTIPV4 : 127.0.0.1
  hosts_require_tls = HOSTIPV4
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = \
    ${if eq{$host_address}{127.0.0.1}{CA1}{CA2}}

# this will fail to verify the cert but continue unverified though crypted
send_to_server_crypt:
  driver = smtp
  allow_localhost
  hosts = HOSTIPV4
  hosts_require_tls = HOSTIPV4
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = CA2
  tls_try_verify_hosts = *

# this will fail to verify the cert at HOSTNAME and fallback to unencrypted
# Fail due to lack of correct CA
send_to_server_req_fail:
  driver = smtp
  allow_localhost
  hosts = HOSTNAME
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = CA2
  tls_verify_hosts = *

# this will fail to verify the cert name and fallback to unencrypted
# fail because the cert is "server1.example.com" and the test system is something else
send_to_server_req_failname:
  driver = smtp
  allow_localhost
  hosts = HOSTNAME
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = CA1
  tls_verify_cert_hostnames = *
  tls_verify_hosts = *

# this will pass the cert verify including name check
# our stunt DNS has an A record for server1.example.com -> HOSTIPV4
send_to_server_req_passname:
  driver = smtp
  allow_localhost
  hosts = server1.example.com
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = CA1
  tls_verify_cert_hostnames = *
  tls_verify_hosts = *

# this will fail to verify the cert name but carry on (try-verify mode)
# fail because the cert is "server1.example.com" and the test system is something else
send_to_server_req_failcarryon:
  driver = smtp
  allow_localhost
  hosts = HOSTNAME
  port = PORT_D
  tls_certificate = CERT2
  tls_privatekey = CERT2

  tls_verify_certificates = CA1
  tls_verify_cert_hostnames = *
  tls_try_verify_hosts = *

# End