com.eucalyptus.auth.util.Identifiers.java Source code

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Here is the source code for com.eucalyptus.auth.util.Identifiers.java

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/*************************************************************************
 * Copyright 2009-2015 Eucalyptus Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.auth.util;

import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;
import java.util.ServiceLoader;
import com.eucalyptus.crypto.Crypto;
import com.eucalyptus.crypto.Digest;
import com.google.common.collect.Iterables;
import com.google.common.io.BaseEncoding;

/**
 *
 */
public class Identifiers {

    private static final BaseEncoding identifierEncoding = BaseEncoding.base32();

    public static String generateAccountNumber() {
        return getRegionAccountNumberPartition() + String.format("%09d", (long) (Math.pow(10, 9) * Math.random()));
    }

    public static String generateIdentifier(final String prefix) {
        return prefix + getRegionIdentifierPartition() + getRandomPart();
    }

    public static String generateAccessKeyIdentifier() {
        return "AKI" + getRegionIdentifierPartition() + getRandomPart().substring(1); // AKI is only 20 characters
    }

    public static String generateCertificateIdentifier(final X509Certificate certificate)
            throws CertificateEncodingException {
        return identifierEncoding.encode(Digest.SHA1.digestBinary(certificate.getEncoded()));
    }

    private static String getRandomPart() {
        final byte[] random = new byte[10];
        Crypto.getSecureRandomSupplier().get().nextBytes(random);
        return identifierEncoding.encode(random);
    }

    private static String getRegionAccountNumberPartition() {
        return Iterables.getFirst(Partition.supplier.getAccountNumberPartitions(), "000");
    }

    private static String getRegionIdentifierPartition() {
        return Iterables.getFirst(Partition.supplier.getIdentifierPartitions(), "AA");
    }

    private static class Partition {
        private static final IdentifierPartitionSupplier supplier = Iterables
                .get(ServiceLoader.load(IdentifierPartitionSupplier.class), 0);
    }

    public static interface IdentifierPartitionSupplier {
        public Iterable<String> getAccountNumberPartitions();

        public Iterable<String> getIdentifierPartitions();
    }
}