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A Java security provider for supporting ShangMi algorithms in public key infrastructure
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/*
 * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.tencent.kona.sun.security.x509;

import java.io.IOException;

import com.tencent.kona.sun.security.util.Debug;
import com.tencent.kona.sun.security.util.DerOutputStream;
import com.tencent.kona.sun.security.util.DerValue;
import com.tencent.kona.sun.security.util.KnownOIDs;
import com.tencent.kona.sun.security.util.ObjectIdentifier;
import com.tencent.kona.sun.security.util.Oid;

/**
 * This class represents the Inhibit Any-Policy Extension.
 *
 * The inhibit any-policy extension can be used in certificates issued
 * to CAs. The inhibit any-policy indicates that the special any-policy
 * OID, with the value {2 5 29 32 0}, is not considered an explicit
 * match for other certificate policies.  The value indicates the number
 * of additional certificates that may appear in the path before any-
 * policy is no longer permitted.  For example, a value of one indicates
 * that any-policy may be processed in certificates issued by the sub-
 * ject of this certificate, but not in additional certificates in the
 * path.
 * 

 * This extension MUST be critical.
 * 

 * The ASN.1 syntax for this extension is:
 * 
{@code
 * id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::=  { id-ce 54 }
 *
 * InhibitAnyPolicy ::= SkipCerts
 *
 * SkipCerts ::= INTEGER (0..MAX)
 * }
 * @author Anne Anderson
 * @see Extension
 */
public class InhibitAnyPolicyExtension extends Extension {

    /**
     * Object identifier for "any-policy"
     */
    public static ObjectIdentifier AnyPolicy_Id =
            Oid.of(KnownOIDs.CE_CERT_POLICIES_ANY);

    public static final String NAME = "InhibitAnyPolicy";

    // Private data members
    private int skipCerts = Integer.MAX_VALUE;

    // Encode this extension value
    private void encodeThis() {
        DerOutputStream out = new DerOutputStream();
        out.putInteger(skipCerts);
        this.extensionValue = out.toByteArray();
    }

    /**
     * Default constructor for this object.
     *
     * @param skipCerts specifies the depth of the certification path.
     *                  Use value of -1 to request unlimited depth.
     */
    public InhibitAnyPolicyExtension(int skipCerts) {
        if (skipCerts < -1)
            throw new IllegalArgumentException("Invalid value for skipCerts");
        if (skipCerts == -1)
            this.skipCerts = Integer.MAX_VALUE;
        else
            this.skipCerts = skipCerts;
        this.extensionId = PKIXExtensions.InhibitAnyPolicy_Id;
        critical = true;
        encodeThis();
    }

    /**
     * Create the extension from the passed DER encoded value of the same.
     *
     * @param critical criticality flag to use.  Must be true for this
     *                 extension.
     * @param value a byte array holding the DER-encoded extension value.
     * @exception ClassCastException if value is not an array of bytes
     * @exception IOException on error.
     */
    public InhibitAnyPolicyExtension(Boolean critical, Object value)
            throws IOException {

        this.extensionId = PKIXExtensions.InhibitAnyPolicy_Id;

        if (!critical.booleanValue())
            throw new IOException("Criticality cannot be false for " +
                    "InhibitAnyPolicy");
        this.critical = true;

        this.extensionValue = (byte[]) value;
        DerValue val = new DerValue(this.extensionValue);
        if (val.tag != DerValue.tag_Integer)
            throw new IOException("Invalid encoding of InhibitAnyPolicy: "
                    + "data not integer");

        if (val.data == null)
            throw new IOException("Invalid encoding of InhibitAnyPolicy: "
                    + "null data");
        int skipCertsValue = val.getInteger();
        if (skipCertsValue < -1)
            throw new IOException("Invalid value for skipCerts");
        if (skipCertsValue == -1) {
            this.skipCerts = Integer.MAX_VALUE;
        } else {
            this.skipCerts = skipCertsValue;
        }
    }

    /**
     * Return user readable form of extension.
     */
    public String toString() {
        return super.toString() + "InhibitAnyPolicy: " + skipCerts + "\n";
    }

    /**
     * Encode this extension value to the output stream.
     *
     * @param out the DerOutputStream to encode the extension to.
     */
    @Override
    public void encode(DerOutputStream out) {
        if (extensionValue == null) {
            this.extensionId = PKIXExtensions.InhibitAnyPolicy_Id;
            critical = true;
            encodeThis();
        }
        super.encode(out);
    }

    public int getSkipCerts() {
        return skipCerts;
    }

    /**
     * Return the name of this extension.
     *
     * @return name of extension.
     */
    @Override
    public String getName() {
        return NAME;
    }
}