requests Kerberos/GSSAPI authentication library
Requests is an HTTP library, written in Python, for human beings. This library adds optional Kerberos/GSSAPI authentication support and supports mutual authentication. Basic GET usage:
>>> import requests >>> from requests_kerberos import HTTPKerberosAuth >>> r = requests.get("http://example.org", auth=HTTPKerberosAuth()) ...
requests.api should be supported.
Client authentication failures will be communicated to the caller by returning the 401 response.
HTTPKerberosAuth will require mutual authentication from the
server, and if a server emits a non-error response which cannot be
requests_kerberos.errors.MutualAuthenticationError will be
raised. If a server emits an error which cannot be authenticated, it will be
returned to the user but with its contents and headers stripped.
If you'd prefer to not require mutual authentication, you can set your
preference when constructing your
>>> import requests >>> from requests_kerberos import HTTPKerberosAuth, OPTIONAL >>> kerberos_auth = HTTPKerberosAuth(mutual_authentication=OPTIONAL) >>> r = requests.get("http://example.org", auth=kerberos_auth) ...
This will cause
requests_kerberos to attempt mutual authentication if the
server advertises that it supports it, and cause a failure if authentication
fails, but not if the server does not support it at all.
While we don't recommend it, if you'd prefer to never attempt mutual authentication, you can do that as well:
>>> import requests >>> from requests_kerberos import HTTPKerberosAuth, DISABLED >>> kerberos_auth = HTTPKerberosAuth(mutual_authentication=DISABLED) >>> r = requests.get("http://example.org", auth=kerberos_auth) ...
HTTPKerberosAuth can be forced to preemptively initiate the Kerberos GSS exchange and present a Kerberos ticket on the initial request (and all subsequent). By default, authentication only occurs after a
401 Unauthorized response containing a Kerberos or Negotiate challenge is received from the origin server. This can cause mutual authentication failures for hosts that use a persistent connection (eg, Windows/WinRM), as no Kerberos challenges are sent after the initial auth handshake. This behavior can be altered by setting
>>> import requests >>> from requests_kerberos import HTTPKerberosAuth, REQUIRED >>> kerberos_auth = HTTPKerberosAuth(mutual_authentication=REQUIRED, force_preemptive=True) >>> r = requests.get("https://windows.example.org/wsman", auth=kerberos_auth) ...
This library makes extensive use of Python's logging facilities.
Log messages are logged to the
requests_kerberos.kerberos_ named loggers.
If you are having difficulty we suggest you configure logging. Issues with the underlying kerberos libraries will be made apparent. Additionally, copious debug information is made available which may assist in troubleshooting if you increase your log level all the way up to debug.