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java.lang.Objectcom.cloudera.alfredo.client.KerberosAuthenticator
public class KerberosAuthenticator
The KerberosAuthenticator
implements the Kerberos SPNEGO authentication sequence.
It uses the default principal for the Kerberos cache (normally set via kinit).
It falls back to the PseudoAuthenticator
if the HTTP endpoint does not trigger an SPNEGO authentication
sequence.
Field Summary | |
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static String |
AUTHORIZATION
HTTP header used by the SPNEGO client endpoint during an authentication sequence. |
static String |
NEGOTIATE
HTTP header prefix used by the SPNEGO client/server endpoints during an authentication sequence. |
static String |
WWW_AUTHENTICATE
HTTP header used by the SPNEGO server endpoint during an authentication sequence. |
Constructor Summary | |
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KerberosAuthenticator()
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Method Summary | |
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void |
authenticate(URL url,
AuthenticatedURL.Token token)
Performs SPNEGO authentication against the specified URL. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static String WWW_AUTHENTICATE
public static String AUTHORIZATION
public static String NEGOTIATE
Constructor Detail |
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public KerberosAuthenticator()
Method Detail |
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public void authenticate(URL url, AuthenticatedURL.Token token) throws IOException, AuthenticationException
If a token is given if does a NOP and returns the given token.
If no token is given, it will perform the SPNEGO authentication sequency using a
HTTP OPTIONS
request.
authenticate
in interface Authenticator
url
- the URl to authenticate against.token
- the authencation token being used for the user.
IOException
- if an IO error occurred.
AuthenticationException
- if an authentication error occurred.
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