Chapter 7. Security
Chapter 7. Security 7.1. Securing connections with SSL/TLS AMQ Python uses SSL/TLS to encrypt communication between clients and servers. To connect to a remote server with SSL/TLS, use a connection URL with the amqps scheme. Example: Enabling SSL/TLS container.connect(" amqps ://example.com") 7.2. Connecting with a user and password AMQ Python can authenticate connections with a user and password. To specify the credentials used for authentication, set the user and password options on the connect() method. Example: Connecting with a user and password container.connect("amqps://example.com", user="alice" , password="secret" ) 7.3. Configuring SASL authentication AMQ Python uses the SASL protocol to perform authentication. SASL can use a number of different authentication mechanisms . When two network peers connect, they exchange their allowed mechanisms, and the strongest mechanism allowed by both is selected. Note The client uses Cyrus SASL to perform authentication. Cyrus SASL uses plug-ins to support specific SASL mechanisms. Before you can use a particular SASL mechanism, the relevant plug-in must be installed. For example, you need the cyrus-sasl-plain plug-in in order to use SASL PLAIN authentication. To see a list of Cyrus SASL plug-ins in Red Hat Enterprise Linux, use the yum search cyrus-sasl command. To install a Cyrus SASL plug-in, use the yum install PLUG-IN command. By default, AMQ Python allows all of the mechanisms supported by the local SASL library configuration. To restrict the allowed mechanisms and thereby control what mechanisms can be negotiated, use the allowed_mechs connection option. It takes a string containing a space-separated list of mechanism names. Example: Configuring SASL authentication container.connect("amqps://example.com", allowed_mechs="ANONYMOUS" ) This example forces the connection to authenticate using the ANONYMOUS mechanism even if the server we connect to offers other options. Valid mechanisms include ANONYMOUS , PLAIN , SCRAM-SHA-256 , SCRAM-SHA-1 , GSSAPI , and EXTERNAL . AMQ Python enables SASL by default. To disable it, set the sasl_enabled connection option to false. Example: Disabling SASL event.container.connect("amqps://example.com", sasl_enabled=False ) 7.4. Authenticating using Kerberos Kerberos is a network protocol for centrally managed authentication based on the exchange of encrypted tickets. See Using Kerberos for more information. Configure Kerberos in your operating system. See Configuring Kerberos to set up Kerberos on Red Hat Enterprise Linux. Enable the GSSAPI SASL mechanism in your client application. container.connect("amqps://example.com", allowed_mechs="GSSAPI" ) Use the kinit command to authenticate your user credentials and store the resulting Kerberos ticket. USD kinit <user> @ <realm> Run the client program.
container.connect(" amqps ://example.com") container.connect("amqps://example.com", user="alice" , password="secret" ) container.connect("amqps://example.com", allowed_mechs="ANONYMOUS" ) event.container.connect("amqps://example.com", sasl_enabled=False ) container.connect("amqps://example.com", allowed_mechs="GSSAPI" ) kinit <user> @ <realm>