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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.its;

import java.util.HashMap;
import java.util.Map;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.oer.its.ieee1609dot2.basetypes.HashAlgorithm;

public class ITSAlgorithmUtils
{
    private static final Map algoMap = new HashMap();


    static
    {
        algoMap.put(NISTObjectIdentifiers.id_sha256, HashAlgorithm.sha256);
        algoMap.put(NISTObjectIdentifiers.id_sha384, HashAlgorithm.sha384);
    }

    public static HashAlgorithm getHashAlgorithm(ASN1ObjectIdentifier oid)
    {
        return algoMap.get(oid);
    }
}