org.jose4j.jwe.ContentEncryptionHelp Maven / Gradle / Ivy
/*
* Copyright 2012-2017 Brian Campbell
*
* Licensed 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.jose4j.jwe;
import org.jose4j.jca.ProviderContext;
import org.jose4j.jwx.Headers;
import static org.jose4j.jwe.KeyManagementAlgorithmIdentifiers.DIRECT;
import static org.jose4j.jwx.HeaderParameterNames.ALGORITHM;
/**
*
*/
class ContentEncryptionHelp
{
static String getCipherProvider(Headers headers, ProviderContext providerCtx)
{
ProviderContext.Context ctx = choseContext(headers, providerCtx);
return ctx.getCipherProvider();
}
static String getMacProvider(Headers headers, ProviderContext providerContext)
{
ProviderContext.Context ctx = choseContext(headers, providerContext);
return ctx.getMacProvider();
}
private static ProviderContext.Context choseContext(Headers headers, ProviderContext providerCtx)
{
boolean isDir = headers != null && DIRECT.equals(headers.getStringHeaderValue(ALGORITHM));
return isDir ? providerCtx.getSuppliedKeyProviderContext() : providerCtx.getGeneralProviderContext();
}
}