[PATCH 2 of 5] Tests: relaxed mail_imap_ssl.t cipher matching

[Maxim Dounin]

# HG changeset patch
# User Maxim Dounin <mdounin at mdounin.ru>
# Date 1714514801 -10800
#      Wed May 01 01:06:41 2024 +0300
# Node ID 9910e3aa527abb558fbcd6ea54af9b22f058d361
# Parent  3226c8c9a58a97be60cf8b651ac3a48b18d61e82
Tests: relaxed mail_imap_ssl.t cipher matching.

Previously, exact match between cipher name in the log and the one from
IO::Socket:SSL was needed, which might not be the case if nginx and
Net::SSLeay are compiled with different SSL libraries, notably LibreSSL
(which uses names like AEAD-AES256-GCM-SHA384 till 3.5.0), and
OpenSSL or BoringSSL (which use TLS_AES_256_GCM_SHA384).  In particular,
this affects macOS, where Net::SSLeay compiled with LibreSSL 3.3.6 is
shipped with the OS, while nginx is likely to be compiled with OpenSSL.

Fix is to not require exact match but instead accept properly looking names
as checked by a regular expression, similarly to how it is already tested
in ssl.t and stream_ssl_variables.t.

diff --git a/mail_imap_ssl.t b/mail_imap_ssl.t
--- a/mail_imap_ssl.t
+++ b/mail_imap_ssl.t
@@ -29,7 +29,7 @@ select STDOUT; $| = 1;
 local $SIG{PIPE} = 'IGNORE';
 
 my $t = Test::Nginx->new()
-	->has(qw/mail mail_ssl imap http rewrite socket_ssl_sslversion/)
+	->has(qw/mail mail_ssl imap http rewrite socket_ssl/)
 	->has_daemon('openssl')->plan(13)
 	->write_file_expand('nginx.conf', <<'EOF');
 
@@ -202,15 +202,6 @@ my $s = Test::Nginx::IMAP->new();
 $s->send('1 AUTHENTICATE PLAIN ' . $cred->("s5"));
 $s->read();
 
-# Auth-SSL-Protocol and Auth-SSL-Cipher headers
-
-my ($cipher, $sslversion);
-
-$s = Test::Nginx::IMAP->new(SSL => 1);
-$cipher = $s->socket()->get_cipher();
-$sslversion = $s->socket()->get_sslversion();
-$sslversion =~ s/_/./;
-
 undef $s;
 
 # test auth_http request header fields with access_log
@@ -229,6 +220,6 @@ like($f, qr!^on:SUCCESS:(/?CN=3.example.
 	'log - trusted cert');
 
 $f = $t->read_file('auth2.log');
-like($f, qr|^$cipher:$sslversion$|m, 'log - cipher sslversion');
+like($f, qr/^[\w-]+:(TLS|SSL)v[\d.]+$/m, 'log - cipher sslversion');
 
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