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HADOOP-12897. KerberosAuthenticator.authenticate to include URL on IO failures. Contributed by Ajay Kumar.

This commit is contained in:
Arpit Agarwal 2018-02-13 10:14:16 -08:00
parent c5e6e3de1c
commit 332269de06
2 changed files with 82 additions and 27 deletions
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80
hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/client/KerberosAuthenticator.java
View File

@ -13,6 +13,8 @@
*/
package org.apache.hadoop.security.authentication.client;
import com.google.common.annotations.VisibleForTesting;
import java.lang.reflect.Constructor;
import org.apache.commons.codec.binary.Base64;
import org.apache.hadoop.security.authentication.server.HttpConstants;
import org.apache.hadoop.security.authentication.util.AuthToken;
@ -177,41 +179,65 @@ public class KerberosAuthenticator implements Authenticator {
*/
@Override
public void authenticate(URL url, AuthenticatedURL.Token token)
throws IOException, AuthenticationException {
throws IOException, AuthenticationException {
if (!token.isSet()) {
this.url = url;
base64 = new Base64(0);
HttpURLConnection conn = token.openConnection(url, connConfigurator);
conn.setRequestMethod(AUTH_HTTP_METHOD);
conn.connect();
boolean needFallback = false;
if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
LOG.debug("JDK performed authentication on our behalf.");
// If the JDK already did the SPNEGO back-and-forth for
// us, just pull out the token.
AuthenticatedURL.extractToken(conn, token);
if (isTokenKerberos(token)) {
return;
try {
HttpURLConnection conn = token.openConnection(url, connConfigurator);
conn.setRequestMethod(AUTH_HTTP_METHOD);
conn.connect();
boolean needFallback = false;
if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
LOG.debug("JDK performed authentication on our behalf.");
// If the JDK already did the SPNEGO back-and-forth for
// us, just pull out the token.
AuthenticatedURL.extractToken(conn, token);
if (isTokenKerberos(token)) {
return;
}
needFallback = true;
}
needFallback = true;
}
if (!needFallback && isNegotiate(conn)) {
LOG.debug("Performing our own SPNEGO sequence.");
doSpnegoSequence(token);
} else {
LOG.debug("Using fallback authenticator sequence.");
Authenticator auth = getFallBackAuthenticator();
// Make sure that the fall back authenticator have the same
// ConnectionConfigurator, since the method might be overridden.
// Otherwise the fall back authenticator might not have the information
// to make the connection (e.g., SSL certificates)
auth.setConnectionConfigurator(connConfigurator);
auth.authenticate(url, token);
if (!needFallback && isNegotiate(conn)) {
LOG.debug("Performing our own SPNEGO sequence.");
doSpnegoSequence(token);
} else {
LOG.debug("Using fallback authenticator sequence.");
Authenticator auth = getFallBackAuthenticator();
// Make sure that the fall back authenticator have the same
// ConnectionConfigurator, since the method might be overridden.
// Otherwise the fall back authenticator might not have the
// information to make the connection (e.g., SSL certificates)
auth.setConnectionConfigurator(connConfigurator);
auth.authenticate(url, token);
}
} catch (IOException ex){
throw wrapExceptionWithMessage(ex,
"Error while authenticating with endpoint: " + url);
} catch (AuthenticationException ex){
throw wrapExceptionWithMessage(ex,
"Error while authenticating with endpoint: " + url);
}
}
}
@VisibleForTesting
static <T extends Exception> T wrapExceptionWithMessage(
T exception, String msg) {
Class<? extends Throwable> exceptionClass = exception.getClass();
try {
Constructor<? extends Throwable> ctor = exceptionClass
.getConstructor(String.class);
Throwable t = ctor.newInstance(msg);
return (T) (t.initCause(exception));
} catch (Throwable e) {
LOG.debug("Unable to wrap exception of type {}, it has "
+ "no (String) constructor.", exceptionClass, e);
return exception;
}
}
/**
* If the specified URL does not support SPNEGO authentication, a fallback {@link Authenticator} will be used.
* <p>

29
hadoop-common-project/hadoop-auth/src/test/java/org/apache/hadoop/security/authentication/client/TestKerberosAuthenticator.java
View File

@ -20,6 +20,9 @@ import static org.apache.hadoop.security.authentication.server.KerberosAuthentic
import static org.apache.hadoop.security.authentication.server.KerberosAuthenticationHandler.KEYTAB;
import static org.apache.hadoop.security.authentication.server.KerberosAuthenticationHandler.NAME_RULES;
import java.io.IOException;
import java.nio.charset.CharacterCodingException;
import javax.security.sasl.AuthenticationException;
import org.apache.hadoop.minikdc.KerberosSecurityTestcase;
import org.apache.hadoop.security.authentication.KerberosTestUtils;
import org.apache.hadoop.security.authentication.server.AuthenticationFilter;
@ -218,4 +221,30 @@ public class TestKerberosAuthenticator extends KerberosSecurityTestcase {
});
}
@Test(timeout = 60000)
public void testWrapExceptionWithMessage() {
IOException ex;
ex = new IOException("Induced exception");
ex = KerberosAuthenticator.wrapExceptionWithMessage(ex, "Error while "
+ "authenticating with endpoint: localhost");
Assert.assertEquals("Induced exception", ex.getCause().getMessage());
Assert.assertEquals("Error while authenticating with endpoint: localhost",
ex.getMessage());
ex = new AuthenticationException("Auth exception");
ex = KerberosAuthenticator.wrapExceptionWithMessage(ex, "Error while "
+ "authenticating with endpoint: localhost");
Assert.assertEquals("Auth exception", ex.getCause().getMessage());
Assert.assertEquals("Error while authenticating with endpoint: localhost",
ex.getMessage());
// Test for Exception with no (String) constructor
// redirect the LOG to and check log message
ex = new CharacterCodingException();
Exception ex2 = KerberosAuthenticator.wrapExceptionWithMessage(ex,
"Error while authenticating with endpoint: localhost");
Assert.assertTrue(ex instanceof CharacterCodingException);
Assert.assertTrue(ex.equals(ex2));
}
}