Hello, I ran into in issue regarding the certifiate verification.
Exim is the server, Swaks is (for testing purpose) the client.
The spec:
+-----------------------+---------+-------------+--------------+
|tls_verify_certificates|Use: main|Type: string*|Default: unset|
+-----------------------+---------+-------------+--------------+
The value of this option is expanded, and must then be the absolute path to
a
file containing permitted certificates for clients that match
tls_verify_hosts
or tls_try_verify_hosts.
…
A forced expansion failure or setting to an empty string is equivalent to
being
unset.
I believe the spec does not match the behaviour.
For demonstration purpose I've stripped down the configuration and I'm
testing it using a recent swaks --tls-cert … --tls-key … --pipe …
,--
|acl_smtp_rcpt = acl_check_rcpt
|
|tls_advertise_hosts = *
|tls_certificate = $config_dir/crt.pem
|tls_privatekey = $config_dir/key.pem
|
|tls_verify_hosts = *
|# tls_verify_certificates =
|
|begin acl
| acl_check_rcpt:
| warn logwrite = Verified: $tls_in_certificate_verified
| logwrite = Peer DN: $tls_in_peerdn
| accept
`--
unset:: With tls_verify_certificates not mentioned (as above) I get
LOG: Exim configuration error: tls_verify_hosts is set, but
tls_verify_certificates is not set
empty string:: With "tls_verify_certificates =", I get
LOG: Verified: 0
LOG: Peer dn:
forced failure:: With "tls_verify_cerificates = ${if eq{a}{b}{foo}fail} I get
LOG: Verified: 0
LOG: Peer dn:
(( non empty string:: With "tls_verify_certificates = /dev/null" this /dev/null
gets
added to the default list of certs in the CA store: This works as
documented:
LOG: Verified: 1
LOG: Peer dn: /C=DE/ST=Saxony/O=schlittermann -- internet & unix
support/CN=jumper.schlittermann.de
This is another issue I'll discuss in a next message.
))
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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