From 524338a0dbd2180b49c66595777e76dcbba1203b Mon Sep 17 00:00:00 2001
From: Zeljko Boros <Zeljko.Boros@carnet.hr>
Date: Wed, 28 Apr 2021 13:55:03 +0200
Subject: [PATCH] uklanja kludge, popravlja varijablu ssl_min_protocol

---
 debian/changelog |    8 +++++++
 debian/postinst  |   61 ++++++++++++++++++++++++++++++++++++++++--------------
 2 files changed, 54 insertions(+), 15 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index a62598c..8262cfc 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+dovecot-cn (1:2.3.4.1+cn10u2) stable; urgency=medium
+
+  * Popravlja varijablu ssl_protocols na ssl_min_protocol
+  * Forsira TLSv1.2, osim ako je već postavljen "ssl_min_protocol = TLS*"
+  * Uklanja kludge napravljen u carnet-upgrade (95-cn*-upgrade.conf)
+
+ -- Zeljko Boros <Zeljko.Boros@carnet.hr>  Wed, 28 Apr 2021 13:52:42 +0200
+
 dovecot-cn (1:2.3.4.1+cn10u1) stable; urgency=medium
 
   * Prva verzija za buster
diff --git a/debian/postinst b/debian/postinst
index 5b18253..18fd1cf 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -65,33 +65,64 @@ if ! grep -q ^ssl_cert /etc/dovecot/conf.d/10-ssl.conf \
   cp_check_and_sed '#ssl_key = </etc/dovecot/private/dovecot.pem' \
 		   's|#ssl_key = </etc/dovecot/private/dovecot.pem|ssl_key = </etc/dovecot/private/dovecot.pem|g' \
 		   /etc/dovecot/conf.d/10-ssl.conf || true
-  # negdje se pojavljuje dovecot.key
+  # negdje se pojavljuje dovecot.key umjesto dovecot.pem
   cp_check_and_sed 'ssl_key = </etc/dovecot/private/dovecot.key' \
 		   's|ssl_key = </etc/dovecot/private/dovecot.key|ssl_key = </etc/dovecot/private/dovecot.pem|g' \
 		   /etc/dovecot/conf.d/10-ssl.conf || true
 fi
 
+### buster ima ssl_min_protocol umjesto ssl_protocols
+# ne radimo ništa ako već postoji ^ssl_min_protocol = TLS*, možda je sistemac smanjivao level TLS-a
 
+if ! grep -q "^ssl_min_protocol = TLS"; then
+	# postavlja minimalni TLS protokol i mijenja ime varijable
+	cp_check_and_sed '#ssl_protocols =' \
+			 's/^#ssl_protocols.*/ssl_min_protocol = TLSv1.2/g' \
+			 /etc/dovecot/conf.d/10-ssl.conf || true
 
+	# postavlja minimalni TLS protokol ako je varijabla već uključena
+	cp_check_and_sed 'ssl_protocols =' \
+			 's/^ssl_protocols.*/ssl_min_protocol = TLSv1.2/g' \
+			 /etc/dovecot/conf.d/10-ssl.conf || true
+
+	# samo popravlja inačicu protokola i uključuje varijablu
+	cp_check_and_sed '#ssl_min_protocol =' \
+			 's/^#ssl_min_protocol.*/ssl_min_protocol = TLSv1.2/g' \
+			 /etc/dovecot/conf.d/10-ssl.conf || true
+
+	# popravlja inačicu protokola ako je varijabla već uključena (ako je zaostao SSLv2 i SSLv3)
+	cp_check_and_sed 'ssl_min_protocol =' \
+			 's/^ssl_min_protocol.*/ssl_min_protocol = TLSv1.2/g' \
+			 /etc/dovecot/conf.d/10-ssl.conf || true
+fi
+
+# maknuti kludge kreiran u carnet-upgrade
+echo "CN: Prebacujem stare konfiguracije za dovecot 95-cn#-upgrade.conf u /var/backups..."
+test -f /etc/dovecot/conf.d/95-cn6-upgrade.conf && mv /etc/dovecot/conf.d/95-cn6-upgrade.conf /var/backups || true
+test -f /etc/dovecot/conf.d/95-cn7-upgrade.conf && mv /etc/dovecot/conf.d/95-cn7-upgrade.conf /var/backups || true
+test -f /etc/dovecot/conf.d/95-cn8-upgrade.conf && mv /etc/dovecot/conf.d/95-cn8-upgrade.conf /var/backups || true
+test -f /etc/dovecot/conf.d/95-cn9-upgrade.conf && mv /etc/dovecot/conf.d/95-cn9-upgrade.conf /var/backups || true
+
+# staro, može se brisati
 # dodao ico, gasi SSLv3 protokol
-cp_check_and_sed '#ssl_protocols =' \
-		 's/^#ssl_protocols.*/ssl_protocols = !SSLv3/g' \
-		 /etc/dovecot/conf.d/10-ssl.conf || true
+#cp_check_and_sed '#ssl_protocols =' \
+#		 's/^#ssl_protocols.*/ssl_protocols = !SSLv3/g' \
+#		 /etc/dovecot/conf.d/10-ssl.conf || true
 
 # dodao zelja, gasi stare SSL protokole
-cp_check_and_sed 'ssl_protocols =' \
-		 's/\!SSLv2 //g' \
-		 /etc/dovecot/conf.d/10-ssl.conf || true
+#cp_check_and_sed 'ssl_protocols =' \
+#		 's/\!SSLv2 //g' \
+#		 /etc/dovecot/conf.d/10-ssl.conf || true
 
 # dodao zelja, gasi stare SSL protokole/ciphere u 95-cn9-upgrade.conf ako postoje
-if [ -f /etc/dovecot/conf.d/95-cn9-upgrade.conf ]; then
-	cp_check_and_sed 'ssl_protocols =' \
-			 's/\!SSLv2 //g' \
-			 /etc/dovecot/conf.d/95-cn9-upgrade.conf || true
-	cp_check_and_sed 'ssl_cipher_list' \
-        	         's/:\!SSLv2//g' \
-			 /etc/dovecot/conf.d/95-cn9-upgrade.conf || true
-fi
+#if [ -f /etc/dovecot/conf.d/95-cn9-upgrade.conf ]; then
+#	cp_check_and_sed 'ssl_protocols =' \
+#			 's/\!SSLv2 //g' \
+#			 /etc/dovecot/conf.d/95-cn9-upgrade.conf || true
+#	cp_check_and_sed 'ssl_cipher_list' \
+#        	         's/:\!SSLv2//g' \
+#			 /etc/dovecot/conf.d/95-cn9-upgrade.conf || true
+#fi
 
 # restart 
 service dovecot restart || true
-- 
1.7.10.4