Rsyslog configuration for certificate with passphrase

I have used rsyslog to send logs with TLS it worked fine. But now i need to use certificate created with passphrase which is encrypted i have used with the same conf file but it gives an error decrypt failure , how can i use the encrypted certificate created with passphrase using openssl genrsa -aes256 -passout pass:passphrase -out privkey.pem 2048

the current rsyslog.conf is
# rsyslog configuration file

# For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html
# If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html

#### MODULES ####

# The imjournal module bellow is now used as a message source instead of imuxsock.
$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imjournal # provides access to the systemd journal
#$ModLoad imklog # reads kernel messages (the same are read from journald)
#$ModLoad immark # provides --MARK-- message capability

# make gtls driver the default
 $DefaultNetstreamDriver gtls
# #
# # # certificate files
$DefaultNetstreamDriverCAFile /etc/cert/ca.crt
$DefaultNetstreamDriverCertFile /etc/cert/client-pass.cert
$DefaultNetstreamDriverKeyFile /etc/cert/client-pass.key
# #
#$ActionSendStreamDriverAuthMode x509/name
#$ActionSendStreamDriverPermittedPeer * #comman name accepted (server)
#$ActionSendStreamDriverMode 1 # run driver in TLS-only mode
#*.*@@10.222.179.124:6514 # forward everything to remote server
#$WorkDirectory /rsyslog/work # default location for work (spool) files
local1.* action(type="omfwd" protocol="tcp" Target="10.222.179.123"
Port="514" )

local2.* action(type="omfwd" Protocol="tcp" Target="10.222.179.124"
Port="6514" StreamDriverMode="1" StreamDriver="gtls"
StreamDriverAuthMode="x509/name"
StreamDriverPermittedPeers="*")

# Provides UDP syslog reception
#$ModLoad imudp
 #$UDPServerRun 514

# Provides TCP syslog reception
#$ModLoad imtcp
#$InputTCPServerRun 514

#### GLOBAL DIRECTIVES ####

# Where to place auxiliary files
$WorkDirectory /var/lib/rsyslog

# Use default timestamp format
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat

# File syncing capability is disabled by default. This feature is usually not required,
# not useful and an extreme performance hit
#$ActionFileEnableSync on

# Include all config files in /etc/rsyslog.d/
$IncludeConfig /etc/rsyslog.d/*.conf

# Turn off message reception via local log socket;
# local messages are retrieved through imjournal now.
$OmitLocalLogging on

# File to store the position in the journal
$IMJournalStateFile imjournal.state

#### RULES ####

# Log all kernel messages to the console.
# Logging much else clutters up the screen.
#kern.* /dev/console

# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none /var/log/messages

# The authpriv file has restricted access.
authpriv.* /var/log/secure

# Log all the mail messages in one place.
mail.* -/var/log/maillog

# Log cron stuff
cron.* /var/log/cron

# Everybody gets emergency messages
*.emerg :omusrmsg:*

# Save news errors of level crit and higher in a special file.
uucp,news.crit /var/log/spooler

# Save boot messages also to boot.log
local7.* /var/log/boot.log

# ### begin forwarding rule ###
# The statement between the begin ... end define a SINGLE forwarding
# rule. They belong together, do NOT split them. If you create multiple
# forwarding rules, duplicate the whole block!
# Remote Logging (we use TCP for reliable delivery)
#
# An on-disk queue is created for this action. If the remote host is
# down, messages are spooled to disk and sent when it is up again.
#$ActionQueueFileName fwdRule1 # unique name prefix for spool files
#$ActionQueueMaxDiskSpace 1g # 1gb space limit (use as much as possible)
#$ActionQueueSaveOnShutdown on # save messages to disk on shutdown
#$ActionQueueType LinkedList # run asynchronously
#$ActionResumeRetryCount -1 # infinite retries if host is down
# remote host is: name/ip:port, e.g. 192.168.0.1:514, port optional
#*.* @@remote-host:514
# ### end of the forwarding rule ###