I am getting following error for SPNEGO/Kerberos Authentication
I get this error when I run HelloKeyTab.java file.
***Exception in thread "main" javax.security.auth.login.LoginException: Client not
found in Kerberos database (6)**
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(K
b5LoginModule.java:763)
at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.j
va:584)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl
java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce
sorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.security.auth.login.LoginContext.invoke(LoginContext.java:762)
at javax.security.auth.login.LoginContext.access$000(LoginContext.java:
03)
at javax.security.auth.login.LoginContext$4.run(LoginContext.java:690)
at javax.security.auth.login.LoginContext$4.run(LoginContext.java:688)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:
87)
at javax.security.auth.login.LoginContext.login(LoginContext.java:595)
at net.sourceforge.spnego.SpnegoHttpURLConnection.<init>(SpnegoHttpURLC
nnection.java:207)
at HelloKeytab.main(HelloKeytab.java:17)
Caused by: KrbException: Client not found in Kerberos database (6)
at sun.security.krb5.KrbAsRep.<init>(KrbAsRep.java:76)
at sun.security.krb5.KrbAsReqBuilder.send(KrbAsReqBuilder.java:319)
at sun.security.krb5.KrbAsReqBuilder.action(KrbAsReqBuilder.java:364)
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(K
b5LoginModule.java:735)
... 14 more
Caused by: KrbException: Identifier doesn't match expected value (906)
at sun.security.krb5.internal.KDCRep.init(KDCRep.java:143)
at sun.security.krb5.internal.ASRep.init(ASRep.java:65)
at sun.security.krb5.internal.ASRep.<init>(ASRep.java:60)
at sun.security.krb5.KrbAsRep.<init>(KrbAsRep.java:60)
... 17 more*
Setup,link and files I have used for SPNEGO/Kerberos Authentication.
link- http://spnego.sourceforge.net/
Domain account for tomcat server
user - xyztest
password - ****
principal - princ HTTP/[email protected]
1)HelloKeyTab.java - Test keytab generated for apache tomcat server
public class HelloKeytab {
public static void main(final String[] args) throws Exception {
System.setProperty("java.security.krb5.conf", "krb5.conf");
System.setProperty("sun.security.krb5.debug", "true");
System.setProperty("java.security.auth.login.config", "login.conf");
SpnegoHttpURLConnection spnego = null;
try {
System.out.println("11111111");
spnego = new SpnegoHttpURLConnection("custom-client");
spnego.connect(new URL("http://localhost:8080/DemoAuth/hello_spnego.jsp"));
System.out.println("2222222");
System.out.println("HTTP Status Code: "
+ spnego.getResponseCode());
System.out.println("HTTP Status Message: "
+ spnego.getResponseMessage());
} finally {
if (null != spnego) {
spnego.disconnect();
}
}
}
}
2)krb5.conf - Kerberos Configuration File
[libdefaults]
default_tkt_enctypes = aes256-cts aes256-cts-hmac-sha1-96 aes128-cts- hmac-sha1-96 aes128-cts rc4-hmac des3-cbc-sha1 des-cbc-md5 des-cbc-crc arcfour-hmac arcfour-hmac-md5
default_tgt_enctypes = aes256-cts aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 aes128-cts rc4-hmac des3-cbc-sha1 des-cbc-md5 des-cbc-crc arcfour-hmac arcfour-hmac-md5
permitted_enctypes = aes256-cts aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 aes128-cts rc4-hmac des3-cbc-sha1 des-cbc-md5 des-cbc-crc arcfour-hmac arcfour-hmac-md5
default_domain = CORP.XYZ.COM
[realms]
CORP.XYZ.COM = {
kdc = CORP.XYZ.COM
default_domain = CORP.XYZ.COM
}
[domain_realm]
CORP.XYZ.COM = CORP.XYZ.COM
3)login.conf -Login configuration file
custom-client {
com.sun.security.auth.module.Krb5LoginModule required
storeKey=true
useKeyTab=true
keyTab="C:/apache-tomcat-7.0.40-windows-x64/apache-tomcat-7.0.40/bin/xyztest.keytab"
principal="HTTP/[email protected]";
};
spnego-client {
com.sun.security.auth.module.Krb5LoginModule required;
};
spnego-server {
com.sun.security.auth.module.Krb5LoginModule required
storeKey=true
useKeyTab=true
keyTab="C:/apache-tomcat-7.0.40-windows-x64/apache-tomcat-7.0.40/bin/xyztest.keytab"
principal="HTTP/[email protected]";
};
4)setspn command -to register principal
setspn -s HTTP/APPSERVER1 xyztest
Checking domain DC=corp,DC=xyz,DC=com
Registering ServicePrincipalNames for CN=xyztest,CN=Users,DC=corp,DC=xyz,DC=com
HTTP/APPSERVER1
Updated object
PS C:\Windows\system32> setspn -s HTTP/APPSERVER1.corp.xyz.com xyztest
Checking domain DC=corp,DC=xyz,DC=com
Registering ServicePrincipalNames for CN=xyztest,CN=Users,DC=corp,DC=xyz,DC=com
HTTP/APPSERVER1.corp.xyz.com
Updated object
5)ktpass command : to generate keytab file
ktpass /princ HTTP/[email protected] /mapuser xyztest /pass ***** /out xyztest.keytab /crypto AES256-SHA1 /ptype KRB5_NT_PRINCIPAL
Targeting domain controller: xyzDC1.corp.xyz.com
Using legacy password setting method
ktpass : Successfully mapped HTTP/APPSERVER1 to xyztest.
At line:1 char:1
+ ktpass /princ HTTP/[email protected] /mapuser xyztest /pass *****
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (Successfully ma...o xyztest.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
Key created.
Output keytab to xyztest.keytab:
Keytab version: 0x502
keysize 84 HTTP/[email protected] ptype 1 (KRB5_NT_PRINCIPAL) vno 3 etype 0x12 (AES256-SHA1) keylength 32
(0x6e6afbbefc78946121bd7ed6657524c7409917cae1708223ce938449113d9805)
6)Apache tomcat server
7)JDK 7
8)Domain Controller - Windows Active directory
9)If I try to run kinit command to authenticate principal with keytab I get the same error Client not found in Kerberos database (6)
Command - kinit -k -t xyztest.keytab HTTP/[email protected]
Result - Exception krb_error 6 client not found in kerberos database (6)
10)HelloKDC.java : Link http://spnego.sourceforge.net/ provides HelloKDC.java to test connection to KDC. I can successfully connect to the KDC with HelloKDC.java
public final class HelloKDC {
private HelloKDC() {
// default private
}
public static void main(final String[] args) throws Exception {
// Domain (pre-authentication) account
final String username = "xyztest";
// Password for the pre-auth acct.
final String password = "!Dragonfly1!";
// Name of our krb5 config file
final String krbfile = "krb5.conf";
// Name of our login config file
final String loginfile = "login.conf";
// Name of our login module
final String module = "spnego-client";
// set some system properties
System.setProperty("java.security.krb5.conf", krbfile);
System.setProperty("java.security.auth.login.config", loginfile);
//System.setProperty("sun.security.krb5.debug", true);
// assert
HelloKDC.validate(username, password, krbfile, loginfile, module);
final CallbackHandler handler =
HelloKDC.getUsernamePasswordHandler(username, password);
final LoginContext loginContext = new LoginContext(module, handler);
// attempt to login
loginContext.login();
// output some info
System.out.println("Subject=" + loginContext.getSubject());
// logout
loginContext.logout();
System.out.println("Connection test successful.");
}
private static void validate(final String username, final String password
, final String krbfile, final String loginfile, final String moduleName)
throws FileNotFoundException, NoSuchAlgorithmException {
// confirm username was provided
if (null == username || username.isEmpty()) {
throw new IllegalArgumentException("Must provide a username");
}
// confirm password was provided
if (null == password || password.isEmpty()) {
throw new IllegalArgumentException("Must provide a password");
}
// confirm krb5.conf file exists
if (null == krbfile || krbfile.isEmpty()) {
throw new IllegalArgumentException("Must provide a krb5 file");
} else {
final File file = new File(krbfile);
if (!file.exists()) {
throw new FileNotFoundException(krbfile);
}
}
// confirm loginfile
if (null == loginfile || loginfile.isEmpty()) {
throw new IllegalArgumentException("Must provide a login file");
} else {
final File file = new File(loginfile);
if (!file.exists()) {
throw new FileNotFoundException(loginfile);
}
}
// confirm that runtime loaded the login file
final Configuration config = Configuration.getConfiguration();
// confirm that the module name exists in the file
if (null == config.getAppConfigurationEntry(moduleName)) {
throw new IllegalArgumentException("The module name "
+ moduleName + " was not found in the login file");
}
}
private static CallbackHandler getUsernamePasswordHandler(
final String username, final String password) {
final CallbackHandler handler = new CallbackHandler() {
public void handle(final Callback[] callback) {
for (int i=0; i<callback.length; i++) {
if (callback[i] instanceof NameCallback) {
final NameCallback nameCallback = (NameCallback) callback[i];
nameCallback.setName(username);
} else if (callback[i] instanceof PasswordCallback) {
final PasswordCallback passCallback = (PasswordCallback) callback[i];
passCallback.setPassword(password.toCharArray());
} else {
System.err.println("Unsupported Callback: "
+ callback[i].getClass().getName());
}
}
}
};
return handler;
}
}
Please provide me solution to resolve the error
Client not found in Kerberos database (6)
klist output
#0> Client: xyztest @ CORP.XYZ.COM
Server: krbtgt/CORP.XYZ.COM @ CORP.XYZ.COM
KerbTicket Encryption Type: AES-256-CTS-HMAC-SHA1-96
Ticket Flags 0x60a10000 -> forwardable forwarded renewable pre_authent n
ame_canonicalize
Start Time: 3/8/2017 10:01:14 (local)
End Time: 3/8/2017 20:01:14 (local)
Renew Time: 3/15/2017 10:01:14 (local)
Session Key Type: AES-256-CTS-HMAC-SHA1-96
Cache Flags: 0x2 -> DELEGATION
Kdc Called: xyzDC1.corp.xyz.com
#1> Client: xyztest @ CORP.XYZ.COM
Server: krbtgt/CORP.XYZ.COM @ CORP.XYZ.COM
KerbTicket Encryption Type: AES-256-CTS-HMAC-SHA1-96
Ticket Flags 0x40e10000 -> forwardable renewable initial pre_authent nam
e_canonicalize
Start Time: 3/8/2017 10:01:14 (local)
End Time: 3/8/2017 20:01:14 (local)
Renew Time: 3/15/2017 10:01:14 (local)
Session Key Type: AES-256-CTS-HMAC-SHA1-96
Cache Flags: 0x1 -> PRIMARY
Kdc Called: xyzDC1.corp.xyz.com
#2> Client: xyztest @ CORP.XYZ.COM
Server: ldap/xyzDC1.corp.xyz.com @ CORP.XYZ.COM
KerbTicket Encryption Type: AES-256-CTS-HMAC-SHA1-96
Ticket Flags 0x40a50000 -> forwardable renewable pre_authent ok_as_deleg
ate name_canonicalize
Start Time: 3/8/2017 10:01:16 (local)
End Time: 3/8/2017 20:01:14 (local)
Renew Time: 3/15/2017 10:01:14 (local)
Session Key Type: AES-256-CTS-HMAC-SHA1-96
Cache Flags: 0
Kdc Called: xyzDC1.corp.xyz.com
#3> Client: xyztest @ CORP.XYZ.COM
Server: LDAP/xyzDC1.corp.xyz.com/corp.xyz.com @ CORP.ADAP
TIVE.COM
KerbTicket Encryption Type: AES-256-CTS-HMAC-SHA1-96
Ticket Flags 0x40a50000 -> forwardable renewable pre_authent ok_as_deleg
ate name_canonicalize
Start Time: 3/8/2017 10:01:15 (local)
End Time: 3/8/2017 20:01:14 (local)
Renew Time: 3/15/2017 10:01:14 (local)
Session Key Type: AES-256-CTS-HMAC-SHA1-96
Cache Flags: 0
Kdc Called: xyzDC1.corp.xyz.com
#4> Client: xyztest @ CORP.XYZ.COM
Server: cifs/xyzDC1.corp.xyz.com @ CORP.XYZ.COM
KerbTicket Encryption Type: AES-256-CTS-HMAC-SHA1-96
Ticket Flags 0x40a50000 -> forwardable renewable pre_authent ok_as_deleg
ate name_canonicalize
Start Time: 3/8/2017 10:01:14 (local)
End Time: 3/8/2017 20:01:14 (local)
Renew Time: 3/15/2017 10:01:14 (local)
Session Key Type: AES-256-CTS-HMAC-SHA1-96
Cache Flags: 0
Kdc Called: xyzDC1.corp.xyz.com
