[TACACS+] Add config command for AAA authorization and accounting. (#1889)

This pull request add config command for AAA authorization & accounting.

#### Why I did it
    Support TACACS per-command authorization & accounting.

#### How I did it
    Change AAA config command to support authorization & accounting.
    Change show AAA command to support authorization & accounting.
    Add UT to cover changed code.

#### How to verify it
    1. Build following project and pass all UTs:
        make target/python-wheels/sonic_utilities-1.2-py3-none-any.whl
    2. Test new command manually.

#### Which release branch to backport (provide reason below if selected)
    N/A

#### Description for the changelog
    Add config command for AAA authorization & accounting.

#### A picture of a cute animal (not mandatory but encouraged)

Author: liuh-80

config/aaa.py

@@ -137,6 +137,44 @@ def login(auth_protocol):
         add_table_kv('AAA', 'authentication', 'login', val)
 authentication.add_command(login)
 
+# cmd: aaa authorization
+@click.command()
+@click.argument('protocol', nargs=-1, type=click.Choice([ "tacacs+", "local", "tacacs+ local"]))
+def authorization(protocol):
+    """Switch AAA authorization [tacacs+ | local | '\"tacacs+ local\"']"""
+    if len(protocol) == 0:
+        click.echo('Argument "protocol" is required')
+        return
+
+    if len(protocol) == 1 and (protocol[0] == 'tacacs+' or protocol[0] == 'local'):
+        add_table_kv('AAA', 'authorization', 'login', protocol[0])
+    elif len(protocol) == 1 and protocol[0] == 'tacacs+ local':
+        add_table_kv('AAA', 'authorization', 'login', 'tacacs+,local')
+    else:
+        click.echo('Not a valid command')
+aaa.add_command(authorization)
+
+# cmd: aaa accounting
+@click.command()
+@click.argument('protocol', nargs=-1, type=click.Choice(["disable", "tacacs+", "local", "tacacs+ local"]))
+def accounting(protocol):
+    """Switch AAA accounting [disable | tacacs+ | local | '\"tacacs+ local\"']"""
+    if len(protocol) == 0:
+        click.echo('Argument "protocol" is required')
+        return
+
+    if len(protocol) == 1:
+        if protocol[0] == 'tacacs+' or protocol[0] == 'local':
+            add_table_kv('AAA', 'accounting', 'login', protocol[0])
+        elif protocol[0] == 'tacacs+ local':
+            add_table_kv('AAA', 'accounting', 'login', 'tacacs+,local')
+        elif protocol[0] == 'disable':
+            del_table_key('AAA', 'accounting', 'login')
+        else:
+            click.echo('Not a valid command')
+    else:
+        click.echo('Not a valid command')
+aaa.add_command(accounting)
 
 @click.group()
 def tacacs():

show/main.py

@@ -1478,10 +1478,20 @@ def aaa(db):
         'authentication': {
             'login': 'local (default)',
             'failthrough': 'False (default)'
+        },
+        'authorization': {
+            'login': 'local (default)'
+        },
+        'accounting': {
+            'login': 'disable (default)'
         }
     }
     if 'authentication' in data:
         aaa['authentication'].update(data['authentication'])
+    if 'authorization' in data:
+        aaa['authorization'].update(data['authorization'])
+    if 'accounting' in data:
+        aaa['accounting'].update(data['accounting'])
     for row in aaa:
         entry = aaa[row]
         for key in entry:

tests/aaa_test.py

@@ -18,18 +18,24 @@
 show_aaa_default_output="""\
 AAA authentication login local (default)
 AAA authentication failthrough False (default)
+AAA authorization login local (default)
+AAA accounting login disable (default)
 
 """
 
 show_aaa_radius_output="""\
 AAA authentication login radius
 AAA authentication failthrough False (default)
+AAA authorization login local (default)
+AAA accounting login disable (default)
 
 """
 
 show_aaa_radius_local_output="""\
 AAA authentication login radius,local
 AAA authentication failthrough False (default)
+AAA authorization login local (default)
+AAA accounting login disable (default)
 
 """
 
@@ -40,6 +46,54 @@
 Not a valid command
 """
 
+show_aaa_tacacs_authentication_output="""\
+AAA authentication login tacacs+
+AAA authentication failthrough False (default)
+AAA authorization login local (default)
+AAA accounting login disable (default)
+
+"""
+
+show_aaa_tacacs_authorization_output="""\
+AAA authentication login tacacs+
+AAA authentication failthrough False (default)
+AAA authorization login tacacs+
+AAA accounting login disable (default)
+
+"""
+
+show_aaa_tacacs_local_authorization_output="""\
+AAA authentication login tacacs+
+AAA authentication failthrough False (default)
+AAA authorization login tacacs+,local
+AAA accounting login disable (default)
+
+"""
+
+show_aaa_tacacs_accounting_output="""\
+AAA authentication login tacacs+
+AAA authentication failthrough False (default)
+AAA authorization login tacacs+,local
+AAA accounting login tacacs+
+
+"""
+
+show_aaa_tacacs_local_accounting_output="""\
+AAA authentication login tacacs+
+AAA authentication failthrough False (default)
+AAA authorization login tacacs+,local
+AAA accounting login tacacs+,local
+
+"""
+
+show_aaa_disable_accounting_output="""\
+AAA authentication login tacacs+
+AAA authentication failthrough False (default)
+AAA authorization login tacacs+,local
+AAA accounting login disable
+
+"""
+
 class TestAaa(object):
     @classmethod
     def setup_class(cls):
@@ -136,3 +190,93 @@ def test_config_aaa_radius_invalid(self):
         assert result.exit_code == 0
         assert result.output == config_aaa_not_a_valid_command_output
 
+    def test_config_aaa_tacacs(self, get_cmd_module):
+        (config, show) = get_cmd_module
+        runner = CliRunner()
+        db = Db()
+        db.cfgdb.delete_table("AAA")
+
+        # test tacacs authentication
+        result = runner.invoke(config.config.commands["aaa"],\
+                               ["authentication", "login", "tacacs+"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+        assert result.output == config_aaa_empty_output
+
+        db.cfgdb.mod_entry("AAA", "authentication", {'login' : 'tacacs+'})
+
+        result = runner.invoke(show.cli.commands["aaa"], [], obj=db)
+        assert result.exit_code == 0
+        assert result.output == show_aaa_tacacs_authentication_output
+
+        # test tacacs authorization
+        result = runner.invoke(config.config.commands["aaa"],\
+                               ["authorization", "tacacs+"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+        assert result.output == config_aaa_empty_output
+
+        db.cfgdb.mod_entry("AAA", "authorization", {'login' : 'tacacs+'})
+
+        result = runner.invoke(show.cli.commands["aaa"], [], obj=db)
+        assert result.exit_code == 0
+        assert result.output == show_aaa_tacacs_authorization_output
+
+        # test tacacs + local authorization
+        result = runner.invoke(config.config.commands["aaa"],\
+                               ["authorization", "tacacs+ local"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+        assert result.output == config_aaa_empty_output
+
+        db.cfgdb.mod_entry("AAA", "authorization", {'login' : 'tacacs+,local'})
+
+        result = runner.invoke(show.cli.commands["aaa"], [], obj=db)
+        assert result.exit_code == 0
+        assert result.output == show_aaa_tacacs_local_authorization_output
+
+        # test tacacs accounting
+        result = runner.invoke(config.config.commands["aaa"],\
+                               ["accounting", "tacacs+"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+        assert result.output == config_aaa_empty_output
+
+        db.cfgdb.mod_entry("AAA", "accounting", {'login' : 'tacacs+'})
+
+        result = runner.invoke(show.cli.commands["aaa"], [], obj=db)
+        assert result.exit_code == 0
+        assert result.output == show_aaa_tacacs_accounting_output
+
+        # test tacacs + local accounting
+        result = runner.invoke(config.config.commands["aaa"],\
+                               ["accounting", "tacacs+ local"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+        assert result.output == config_aaa_empty_output
+
+        db.cfgdb.mod_entry("AAA", "accounting", {'login' : 'tacacs+,local'})
+
+        result = runner.invoke(show.cli.commands["aaa"], [], obj=db)
+        assert result.exit_code == 0
+        assert result.output == show_aaa_tacacs_local_accounting_output
+
+        # test disable accounting
+        result = runner.invoke(config.config.commands["aaa"],\
+                               ["accounting", "disable"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+        assert result.output == config_aaa_empty_output
+
+        db.cfgdb.mod_entry("AAA", "accounting", {'login' : 'disable'})
+
+        result = runner.invoke(show.cli.commands["aaa"], [], obj=db)
+        assert result.exit_code == 0
+        assert result.output == show_aaa_disable_accounting_output
+