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package org.bouncycastle.jcajce.provider.util;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.digests.MD5Digest;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.digests.SHA224Digest;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.crypto.digests.SHA384Digest;
import org.bouncycastle.crypto.digests.SHA512Digest;
import org.bouncycastle.util.Strings;
public class DigestFactory
{
private static Set md5 = new HashSet();
private static Set sha1 = new HashSet();
private static Set sha224 = new HashSet();
private static Set sha256 = new HashSet();
private static Set sha384 = new HashSet();
private static Set sha512 = new HashSet();
private static Map oids = new HashMap();
static
{
md5.add("MD5");
md5.add(PKCSObjectIdentifiers.md5.getId());
sha1.add("SHA1");
sha1.add("SHA-1");
sha1.add(OIWObjectIdentifiers.idSHA1.getId());
sha224.add("SHA224");
sha224.add("SHA-224");
sha224.add(NISTObjectIdentifiers.id_sha224.getId());
sha256.add("SHA256");
sha256.add("SHA-256");
sha256.add(NISTObjectIdentifiers.id_sha256.getId());
sha384.add("SHA384");
sha384.add("SHA-384");
sha384.add(NISTObjectIdentifiers.id_sha384.getId());
sha512.add("SHA512");
sha512.add("SHA-512");
sha512.add(NISTObjectIdentifiers.id_sha512.getId());
oids.put("MD5", PKCSObjectIdentifiers.md5);
oids.put(PKCSObjectIdentifiers.md5.getId(), PKCSObjectIdentifiers.md5);
oids.put("SHA1", OIWObjectIdentifiers.idSHA1);
oids.put("SHA-1", OIWObjectIdentifiers.idSHA1);
oids.put(OIWObjectIdentifiers.idSHA1.getId(), OIWObjectIdentifiers.idSHA1);
oids.put("SHA224", NISTObjectIdentifiers.id_sha224);
oids.put("SHA-224", NISTObjectIdentifiers.id_sha224);
oids.put(NISTObjectIdentifiers.id_sha224.getId(), NISTObjectIdentifiers.id_sha224);
oids.put("SHA256", NISTObjectIdentifiers.id_sha256);
oids.put("SHA-256", NISTObjectIdentifiers.id_sha256);
oids.put(NISTObjectIdentifiers.id_sha256.getId(), NISTObjectIdentifiers.id_sha256);
oids.put("SHA384", NISTObjectIdentifiers.id_sha384);
oids.put("SHA-384", NISTObjectIdentifiers.id_sha384);
oids.put(NISTObjectIdentifiers.id_sha384.getId(), NISTObjectIdentifiers.id_sha384);
oids.put("SHA512", NISTObjectIdentifiers.id_sha512);
oids.put("SHA-512", NISTObjectIdentifiers.id_sha512);
oids.put(NISTObjectIdentifiers.id_sha512.getId(), NISTObjectIdentifiers.id_sha512);
}
public static Digest getDigest(
String digestName)
{
digestName = Strings.toUpperCase(digestName);
if (sha1.contains(digestName))
{
return new SHA1Digest();
}
if (md5.contains(digestName))
{
return new MD5Digest();
}
if (sha224.contains(digestName))
{
return new SHA224Digest();
}
if (sha256.contains(digestName))
{
return new SHA256Digest();
}
if (sha384.contains(digestName))
{
return new SHA384Digest();
}
if (sha512.contains(digestName))
{
return new SHA512Digest();
}
return null;
}
public static boolean isSameDigest(
String digest1,
String digest2)
{
return (sha1.contains(digest1) && sha1.contains(digest2))
|| (sha224.contains(digest1) && sha224.contains(digest2))
|| (sha256.contains(digest1) && sha256.contains(digest2))
|| (sha384.contains(digest1) && sha384.contains(digest2))
|| (sha512.contains(digest1) && sha512.contains(digest2))
|| (md5.contains(digest1) && md5.contains(digest2));
}
public static ASN1ObjectIdentifier getOID(
String digestName)
{
return (ASN1ObjectIdentifier)oids.get(digestName);
}
}
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