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/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2006 Ola Bini 
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the CPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the CPL, the GPL or the LGPL.
 ***** END LICENSE BLOCK *****/
package org.jruby.ext.openssl.x509store;

import java.util.ArrayList;
import java.util.List;

/**
 * Used to handle OpenSSL errors in a sane way. These are not safe for
 * multi runtimes at the moments.
 * 
 * @author Ola Bini
 */
public class X509Error {
    private static ThreadLocal> errors = new ThreadLocal>();

    public static class ErrorException extends Exception {
        private static final long serialVersionUID = -3214495184277468063L;

        private int reason;

        public ErrorException(int reason) {
            super();
            this.reason = reason;
        }

        public int getReason() {
            return reason;
        }

        @Override
        public String getMessage() {
            switch (reason) {
            case X509Utils.X509_R_BAD_X509_FILETYPE:
                return "bad x509 filetype";
            case X509Utils.X509_R_BASE64_DECODE_ERROR:
                return "base64 decode error";
            case X509Utils.X509_R_CANT_CHECK_DH_KEY:
                return "cant check dh key";
            case X509Utils.X509_R_CERT_ALREADY_IN_HASH_TABLE:
                return "cert already in hash table";
            case X509Utils.X509_R_ERR_ASN1_LIB:
                return "err asn1 lib";
            case X509Utils.X509_R_INVALID_DIRECTORY:
                return "invalid directory";
            case X509Utils.X509_R_INVALID_FIELD_NAME:
                return "invalid field name";
            case X509Utils.X509_R_INVALID_TRUST:
                return "invalid trust";
            case X509Utils.X509_R_KEY_TYPE_MISMATCH:
                return "key type mismatch";
            case X509Utils.X509_R_KEY_VALUES_MISMATCH:
                return "key values mismatch";
            case X509Utils.X509_R_LOADING_CERT_DIR:
                return "loading cert dir";
            case X509Utils.X509_R_LOADING_DEFAULTS:
                return "loading defaults";
            case X509Utils.X509_R_METHOD_NOT_SUPPORTED:
                return "method not supported";
            case X509Utils.X509_R_NO_CERT_SET_FOR_US_TO_VERIFY:
                return "no cert set for us to verify";
            case X509Utils.X509_R_PUBLIC_KEY_DECODE_ERROR:
                return "public key decode error";
            case X509Utils.X509_R_PUBLIC_KEY_ENCODE_ERROR:
                return "public key encode error";
            case X509Utils.X509_R_SHOULD_RETRY:
                return "should retry";
            case X509Utils.X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN:
                return "unable to find parameters in chain";
            case X509Utils.X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY:
                return "unable to get certs public key";
            case X509Utils.X509_R_UNKNOWN_KEY_TYPE:
                return "unknown key type";
            case X509Utils.X509_R_UNKNOWN_NID:
                return "unknown nid";
            case X509Utils.X509_R_UNKNOWN_PURPOSE_ID:
                return "unknown purpose id";
            case X509Utils.X509_R_UNKNOWN_TRUST_ID:
                return "unknown trust id";
            case X509Utils.X509_R_UNSUPPORTED_ALGORITHM:
                return "unsupported algorithm";
            case X509Utils.X509_R_WRONG_LOOKUP_TYPE:
                return "wrong lookup type";
            case X509Utils.X509_R_WRONG_TYPE:
                return "wrong type";

            default:
                return "(unknown X509 error)";
            }
        }
    }

    public static void addError(int reason) {
        synchronized (errors) {
            List errs = errors.get();
            if (errs == null) {
                errs = new ArrayList();
                errors.set(errs);
            }
            errs.add(new ErrorException(reason));
        }
    }

    public static void clearErrors() {
        synchronized (errors) {
            List errs = errors.get();
            if (errs != null) {
                errs.clear();
            }
        }
    }
    
    public static List getErrors() {
        synchronized (errors) {
            List errs = errors.get();
            if (errs == null) {
                errs = new ArrayList();
                errors.set(errs);
            }
            return errs;
        }
    }
}// Err