#!/usr/bin/env bash
# Authentication and authorization and IETF NACM
# NACM module rules
# A module rule has the "module-name" leaf set but no nodes from the
# "rule-type" choice set.
# @see test_nacm.sh is slightly modified - this follows the RFC more closely
# See RFC 8341 A.1 and A.2
# Note: use clixon-example instead of ietf-netconf-monitoring since the latter is
# Tests for 
# deny-ncm:  This rule prevents the "guest" group from reading any
#     monitoring information in the "clixon-example" YANG
#     module.
# permit-ncm:  This rule allows the "limited" group to read the
#     "clixon-example" YANG module.
# permit-exec:  This rule allows the "limited" group to invoke any
#     protocol operation supported by the server.
# permit-all:  This rule allows the "admin" group complete access to
#     all content in the server.  No subsequent rule will match for the
#     "admin" group because of this module rule

# Magic line must be first in script (see README.md)
s="$_" ; . ./lib.sh || if [ "$s" = $0 ]; then exit 0; else return 0; fi

APPNAME=example

# Common NACM scripts
. ./nacm.sh

cfg=$dir/conf_yang.xml
fyang=$dir/nacm-example.yang

cat <<EOF > $cfg
<clixon-config xmlns="http://clicon.org/config">
  <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
  <CLICON_YANG_DIR>/usr/local/share/clixon</CLICON_YANG_DIR>
  <CLICON_YANG_DIR>$IETFRFC</CLICON_YANG_DIR>
  <CLICON_YANG_MAIN_FILE>$fyang</CLICON_YANG_MAIN_FILE>
  <CLICON_CLISPEC_DIR>/usr/local/lib/$APPNAME/clispec</CLICON_CLISPEC_DIR>
  <CLICON_RESTCONF_DIR>/usr/local/lib/$APPNAME/restconf</CLICON_RESTCONF_DIR>
  <CLICON_CLI_DIR>/usr/local/lib/$APPNAME/cli</CLICON_CLI_DIR>
  <CLICON_CLI_MODE>$APPNAME</CLICON_CLI_MODE>
  <CLICON_SOCK>/usr/local/var/$APPNAME/$APPNAME.sock</CLICON_SOCK>
  <CLICON_BACKEND_DIR>/usr/local/lib/$APPNAME/backend</CLICON_BACKEND_DIR>
  <CLICON_BACKEND_PIDFILE>/usr/local/var/$APPNAME/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
  <CLICON_CLI_GENMODEL_COMPLETION>1</CLICON_CLI_GENMODEL_COMPLETION>
  <CLICON_XMLDB_DIR>/usr/local/var/$APPNAME</CLICON_XMLDB_DIR>
  <CLICON_RESTCONF_PRETTY>false</CLICON_RESTCONF_PRETTY>
  <CLICON_NACM_MODE>internal</CLICON_NACM_MODE>
</clixon-config>
EOF

cat <<EOF > $fyang
module nacm-example{
  yang-version 1.1;
  namespace "urn:example:nacm";
  prefix nacm;
  import clixon-example {
	prefix ex;
  }
  import ietf-netconf-acm {
	prefix nacm;
  }
  leaf x{
    type int32;
    description "something to edit";
  }
}
EOF

# The groups are slightly modified from RFC8341 A.1 ($USER added in admin group)
# The rule-list is from A.2 
RULES=$(cat <<EOF
   <nacm xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-acm">
     <enable-nacm>false</enable-nacm>
     <read-default>deny</read-default>
     <write-default>deny</write-default>
     <exec-default>deny</exec-default>

     $NGROUPS

     <rule-list>
       <name>guest-acl</name>
       <group>guest</group>
       <rule>
         <name>permit-read</name>
         <module-name>clixon-example</module-name>
         <access-operations>*</access-operations>
         <action>deny</action>
         <comment>
             Do not allow guests any access to the NETCONF
             monitoring information.
         </comment>
       </rule>
     </rule-list>
     <rule-list>
       <name>limited-acl</name>
       <group>limited</group>
       <rule>
         <name>permit-ncm</name>
         <module-name>clixon-example</module-name>
         <access-operations>read</access-operations>
         <action>permit</action>
         <comment>
             Allow read access to the NETCONF monitoring information.
         </comment>
       </rule>
       <rule>
         <name>permit-exec</name>
         <module-name>*</module-name>
         <access-operations>exec</access-operations>
         <action>permit</action>
         <comment>
             Allow invocation of the supported server operations.
         </comment>
       </rule>
     </rule-list>

     $NADMIN

   </nacm>
   <x xmlns="urn:example:nacm">42</x>
   <translate xmlns="urn:example:clixon"><k>key42</k><value>val42</value></translate>
   <translate xmlns="urn:example:clixon"><k>key43</k><value>val43</value></translate>
EOF
)

new "test params: -f $cfg -- -s"

if [ $BE -ne 0 ]; then
    new "kill old backend"
    sudo clixon_backend -zf $cfg
    if [ $? -ne 0 ]; then
	err
    fi
    new "start backend -s init -f $cfg -- -s"
    start_backend -s init -f $cfg -- -s
fi

new "kill old restconf daemon"
sudo pkill -u www-data -f "/www-data/clixon_restconf"

new "start restconf daemon (-a is enable basic authentication)"
start_restconf -f $cfg -- -a

new "waiting"
wait_backend
wait_restconf

new "auth set authentication config"
expecteof "$clixon_netconf -qf $cfg" 0 "<rpc><edit-config><target><candidate/></target><config>$RULES</config></edit-config></rpc>]]>]]>" "^<rpc-reply><ok/></rpc-reply>]]>]]>$"

new "commit it"
expecteof "$clixon_netconf -qf $cfg" 0 "<rpc><commit/></rpc>]]>]]>" "^<rpc-reply><ok/></rpc-reply>]]>]]>$"

new "enable nacm"
expecteq "$(curl -u andy:bar -sS -X PUT -H "Content-Type: application/yang-data+json" -d '{"ietf-netconf-acm:enable-nacm": true}' http://localhost/restconf/data/ietf-netconf-acm:nacm/enable-nacm)" 0 ""

#--------------- nacm enabled

#----READ access
#user:admin
new "admin read ok"
expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate)" 0 '{"clixon-example:translate":[{"k":"key42","value":"val42"},{"k":"key43","value":"val43"}]}

'

new "admin read netconf ok"
expecteof "$clixon_netconf -U andy -qf $cfg" 0 '<rpc><get-config><source><candidate/></source><filter type="xpath" select="/t:translate" xmlns:t="urn:example:clixon" /></get-config></rpc>]]>]]>' '^<rpc-reply><data><translate xmlns="urn:example:clixon"><k>key42</k><value>val42</value></translate><translate xmlns="urn:example:clixon"><k>key43</k><value>val43</value></translate></data></rpc-reply>]]>]]>$'

new "admin read element ok"
expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate=key42/value)" 0 '{"clixon-example:value":"val42"}

'

new "admin read other module OK"
expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x":42}

'

new "admin read state OK"
expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/clixon-example:state)" 0 '{"clixon-example:state":{"op":["42","41","43"]}}

'

new "admin read top ok (all)"
ret=$(curl -u andy:bar -sS -X GET http://localhost/restconf/data)
expect='{"data":{"nacm-example:x":42,"clixon-example:translate":'
match=`echo $ret | grep -EZo "$expect"`
if [ -z "$match" ]; then
    err "$expect" "$ret"
fi

#user:limit

new "limit read ok"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate)" 0 '{"clixon-example:translate":[{"k":"key42","value":"val42"},{"k":"key43","value":"val43"}]}

'

new "limit read netconf ok"
expecteof "$clixon_netconf -U wilma -qf $cfg" 0 '<rpc><get-config><source><candidate/></source><filter type="xpath" select="/t:translate" xmlns:t="urn:example:clixon"/></get-config></rpc>]]>]]>' '^<rpc-reply><data><translate xmlns="urn:example:clixon"><k>key42</k><value>val42</value></translate><translate xmlns="urn:example:clixon"><k>key43</k><value>val43</value></translate></data></rpc-reply>]]>]]>$'

new "limit read element ok"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate=key42/value)" 0 '{"clixon-example:value":"val42"}

'

new "limit read other module fail"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors":{"error":{"rpc-error":{"error-type":"application","error-tag":"invalid-value","error-severity":"error","error-message":"Instance does not exist"}}}}
'

new "limit read state OK"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/clixon-example:state)" 0 '{"clixon-example:state":{"op":["42","41","43"]}}

'

new "limit read top ok (part)"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data)" 0 '{"data":{"clixon-example:translate":[{"k":"key42","value":"val42"},{"k":"key43","value":"val43"}],"clixon-example:state":{"op":["42","41","43"]}}}

'

#user:guest

new "guest read fail"
expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'

new "guest read netconf fail"
expecteof "$clixon_netconf -U guest -qf $cfg" 0 '<rpc><get-config><source><candidate/></source><filter type="xpath" select="/t:translate" xmlns:t="urn:example:clixon"/></get-config></rpc>]]>]]>' '^<rpc-reply><rpc-error><error-type>application</error-type><error-tag>access-denied</error-tag><error-severity>error</error-severity><error-message>default deny</error-message></rpc-error></rpc-reply>]]>]]>$'

new "guest read element fail"
expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate=key42/value)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'

new "guest read other module fail"
expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'

new "guest read state fail"
expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/clixon-example:state)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'

new "guest read top ok (part)"
expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'

#------- RPC operation

new "admin rpc ok"
expecteq "$(curl -u andy:bar -s -X POST -H "Content-Type: application/yang-data+json" -d '{"clixon-example:input":{"x":"78"}}' http://localhost/restconf/operations/clixon-example:example)" 0 '{"clixon-example:output":{"x":"78","y":"42"}}

'

new "admin rpc netconf ok"
expecteof "$clixon_netconf -U andy -qf $cfg" 0 '<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><example xmlns="urn:example:clixon"><x>0</x></example></rpc>]]>]]>' 0 '^<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><x xmlns="urn:example:clixon">0</x><y xmlns="urn:example:clixon">42</y></rpc-reply>]]>]]>$'

new "limit rpc ok"
expecteq "$(curl -u wilma:bar -s -X POST http://localhost/restconf/operations/clixon-example:example -H "Content-Type: application/yang-data+json" -d '{"clixon-example:input":{"x":42}}' )" 0 '{"clixon-example:output":{"x":"42","y":"42"}}

'

new "limit rpc netconf ok"
expecteof "$clixon_netconf -U wilma -qf $cfg" 0 '<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><example xmlns="urn:example:clixon"><x>0</x></example></rpc>]]>]]>' 0 '^<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><x xmlns="urn:example:clixon">0</x><y xmlns="urn:example:clixon">42</y></rpc-reply>]]>]]>$'

new "guest rpc fail"
expecteq "$(curl -u guest:bar -s -X POST http://localhost/restconf/operations/clixon-example:example -H "Content-Type: application/yang-data+json" -d '{"clixon-example:input":{"x":42}}' )" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"access denied"}}}
'

new "guest rpc netconf fail"
expecteof "$clixon_netconf -U guest -qf $cfg" 0 '<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><example xmlns="urn:example:clixon"><x>0</x></example></rpc>]]>]]>' 0 '^<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><rpc-error><error-type>application</error-type><error-tag>access-denied</error-tag><error-severity>error</error-severity><error-message>access denied</error-message></rpc-error></rpc-reply>]]>]]>$'

#------------------ Set read-default permit

new "admin set read-default permit"
expecteq "$(curl -u andy:bar -sS -X PUT -H "Content-Type: application/yang-data+json" -d '{"ietf-netconf-acm:read-default":"permit"}' http://localhost/restconf/data/ietf-netconf-acm:nacm/read-default)" 0 ""

new "limit read ok"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/clixon-example:translate)" 0 '{"clixon-example:translate":[{"k":"key42","value":"val42"},{"k":"key43","value":"val43"}]}

'

new "limit read other module ok"
expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x":42}

'

new "guest read state fail"
expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/clixon-example:state)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'


new "Kill restconf daemon"
stop_restconf 


if [ $BE -eq 0 ]; then
    exit # BE
fi

new "Kill backend"
# Check if premature kill
pid=$(pgrep -u root -f clixon_backend)
if [ -z "$pid" ]; then
    err "backend already dead"
fi
# kill backend
stop_backend -f $cfg

rm -rf $dir