| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (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.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==================================================================== */ |
| |
| package org.apache.poi.poifs.crypt.dsig.facets; |
| |
| import java.security.GeneralSecurityException; |
| import java.util.List; |
| |
| import javax.xml.crypto.dsig.DigestMethod; |
| import javax.xml.crypto.dsig.Reference; |
| import javax.xml.crypto.dsig.Transform; |
| import javax.xml.crypto.dsig.XMLSignatureException; |
| import javax.xml.crypto.dsig.XMLSignatureFactory; |
| import javax.xml.crypto.dsig.spec.TransformParameterSpec; |
| |
| import org.apache.poi.poifs.crypt.dsig.SignatureConfig; |
| import org.apache.poi.poifs.crypt.dsig.SignatureInfo; |
| import org.apache.poi.util.Internal; |
| |
| @Internal |
| final class SignatureFacetHelper { |
| private SignatureFacetHelper() {} |
| |
| static Transform newTransform(SignatureInfo signatureInfo, String canonicalizationMethod) throws XMLSignatureException { |
| return newTransform(signatureInfo, canonicalizationMethod, null); |
| } |
| |
| static Transform newTransform(SignatureInfo signatureInfo, String canonicalizationMethod, TransformParameterSpec paramSpec) |
| throws XMLSignatureException { |
| try { |
| return signatureInfo.getSignatureFactory().newTransform(canonicalizationMethod, paramSpec); |
| } catch (GeneralSecurityException e) { |
| throw new XMLSignatureException("unknown canonicalization method: "+canonicalizationMethod, e); |
| } |
| } |
| |
| static Reference newReference( |
| SignatureInfo signatureInfo |
| , String uri |
| , List<Transform> transforms |
| , String type |
| , String id |
| , byte[] digestValue) |
| throws XMLSignatureException { |
| // the references appear in the package signature or the package object |
| // so we can use the default digest algorithm |
| SignatureConfig signatureConfig = signatureInfo.getSignatureConfig(); |
| String digestMethodUri = signatureConfig.getDigestMethodUri(); |
| XMLSignatureFactory sigFac = signatureInfo.getSignatureFactory(); |
| DigestMethod digestMethod; |
| try { |
| digestMethod = sigFac.newDigestMethod(digestMethodUri, null); |
| } catch (GeneralSecurityException e) { |
| throw new XMLSignatureException("unknown digest method uri: "+digestMethodUri, e); |
| } |
| |
| return (digestValue == null) |
| ? sigFac.newReference(uri, digestMethod, transforms, type, id) |
| : sigFac.newReference(uri, digestMethod, transforms, type, id, digestValue); |
| } |
| } |