Java tutorial
/* * * This file is part of the iText (R) project. Copyright (c) 1998-2019 iText Group NV * Authors: Bruno Lowagie, Paulo Soares, et al. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT * OF THIRD PARTY RIGHTS * * 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 Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License * along with this program; if not, see http://www.gnu.org/licenses or write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA, 02110-1301 USA, or download the license from the following URL: * http://itextpdf.com/terms-of-use/ * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * In accordance with Section 7(b) of the GNU Affero General Public License, * a covered work must retain the producer line in every PDF that is created * or manipulated using iText. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the iText software without * disclosing the source code of your own applications. * These activities include: offering paid services to customers as an ASP, * serving PDFs on the fly in a web application, shipping iText with a closed * source product. * * For more information, please contact iText Software Corp. at this * address: sales@itextpdf.com */ package com.itextpdf.text.pdf.security; import java.security.GeneralSecurityException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import org.bouncycastle.jcajce.provider.digest.*; /** * Implementation for digests accessed directly from the BouncyCastle library bypassing * any provider definition. */ public class BouncyCastleDigest implements ExternalDigest { public MessageDigest getMessageDigest(String hashAlgorithm) throws GeneralSecurityException { String oid = DigestAlgorithms.getAllowedDigests(hashAlgorithm); if (oid == null) throw new NoSuchAlgorithmException(hashAlgorithm); if (oid.equals("1.2.840.113549.2.2")) { //MD2 return new MD2.Digest(); } else if (oid.equals("1.2.840.113549.2.5")) { //MD5 return new MD5.Digest(); } else if (oid.equals("1.3.14.3.2.26")) { //SHA1 return new SHA1.Digest(); } else if (oid.equals("2.16.840.1.101.3.4.2.4")) { //SHA224 return new SHA224.Digest(); } else if (oid.equals("2.16.840.1.101.3.4.2.1")) { //SHA256 return new SHA256.Digest(); } else if (oid.equals("2.16.840.1.101.3.4.2.2")) { //SHA384 return new SHA384.Digest(); } else if (oid.equals("2.16.840.1.101.3.4.2.3")) { //SHA512 return new SHA512.Digest(); } else if (oid.equals("1.3.36.3.2.2")) { //RIPEMD128 return new RIPEMD128.Digest(); } else if (oid.equals("1.3.36.3.2.1")) { //RIPEMD160 return new RIPEMD160.Digest(); } else if (oid.equals("1.3.36.3.2.3")) { //RIPEMD256 return new RIPEMD256.Digest(); } else if (oid.equals("1.2.643.2.2.9")) { //GOST3411 return new GOST3411.Digest(); } throw new NoSuchAlgorithmException(hashAlgorithm); //shouldn't get here } }