import org.apache.hc.client5.http.auth.AuthCache;
import org.apache.hc.client5.http.auth.AuthScheme;
import org.apache.hc.client5.http.auth.AuthSchemeFactory;
import org.apache.hc.client5.http.auth.AuthScope;
import org.apache.hc.client5.http.auth.Credentials;
import org.apache.hc.client5.http.auth.CredentialsStore;
import org.apache.hc.client5.http.auth.NTCredentials;

package jcifs.pac.kerberos;

import java.security.Key;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import javax.security.auth.Subject;
import javax.security.auth.kerberos.KerberosKey;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;

/**
 * Kerberos credentials management class that handles authentication through JAAS.
 */
public class KerberosCredentials {

```

### 2. Create a sample OPA Policy

In another terminal, create a policy that allows root user all access and for all other users denies `PutObject`:

```sh
cat > example.rego <<EOF
package httpapi.authz

import input

default allow = false

# Allow the root user to perform any action.
allow {
 input.owner == true
}

# All other users may do anything other than call PutObject
allow {

	}
}

// ConnectWS returns a function that dials a websocket connection to the given address.
// Route and auth are added to the connection.
func ConnectWS(dial ContextDialer, auth AuthFn, tls *tls.Config) func(ctx context.Context, remote string) (net.Conn, error) {
	return ConnectWSWithRoutePath(dial, auth, tls, RoutePath)
}

// ValidateTokenFn must validate the token and return an error if it is invalid.

		authFields := strings.Split(strings.TrimSpace(v4Auth), ",")
		if len(authFields) != 3 {
			return auth.Credentials{}, false, ErrMissingFields
		}
		ch, s3Err = parseCredentialHeader(authFields[0], region, stype)
		if s3Err != ErrNone {
			return auth.Credentials{}, false, s3Err
		}
	}
	return checkKeyValid(r, ch.accessKey)
}

// parse credentialHeader string into its structured form.

    }

    synchronized SmbSession getSmbSession(final NtlmPasswordAuthentication auth) {
        SmbSession ssn;
        long now;

        ListIterator iter = sessions.listIterator();
        while (iter.hasNext()) {
            ssn = (SmbSession) iter.next();
            if (ssn.matches(auth)) {
                ssn.auth = auth;
                return ssn;
            }
        }

type LDAPIdentityResult struct {
	Credentials auth.Credentials `xml:",omitempty"`
}

// AssumeRoleWithCertificateResponse contains the result of
// a successful AssumeRoleWithCertificate request.
type AssumeRoleWithCertificateResponse struct {
	XMLName xml.Name `xml:"https://sts.amazonaws.com/doc/2011-06-15/ AssumeRoleWithCertificateResponse" json:"-"`
	Result  struct {
		Credentials auth.Credentials `xml:"Credentials,omitempty"`

    void anonymousGuestCredentials() throws Exception {
        setupNegotiateStubs();

        NtlmPasswordAuthenticator auth = mock(NtlmPasswordAuthenticator.class);
        when(auth.isAnonymous()).thenReturn(true);
        when(auth.isGuest()).thenReturn(true);
        when(auth.getUsername()).thenReturn("guest");
        when(auth.getUserDomain()).thenReturn("dom");

        // Construct

Client ID can be found by clicking any of the clients listed [here](http://localhost:8080/auth/admin/master/console/#/realms/minio/clients). If you have followed the above steps docs, the default Client ID will be `account`.

```
$ go run docs/sts/web-identity.go -cid account -csec 072e7f00-4289-469c-9ab2-bbe843c7f5a8  -config-ep "http://localhost:8080/auth/realms/minio/.well-known/openid-configuration" -port 8888

                macSigningKey = new byte[40];
                auth.getUserSessionKey(transport.server.encryptionKey, macSigningKey, 0);
                System.arraycopy(auth.getUnicodeHash(transport.server.encryptionKey), 0, macSigningKey, 16, 24);
                break;
            case 3:
            case 4:
            case 5:
                macSigningKey = new byte[16];