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package org.bouncycastle.operator;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.ntt.NTTObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.util.Integers;
public class DefaultSecretKeySizeProvider
implements SecretKeySizeProvider
{
public static final SecretKeySizeProvider INSTANCE = new DefaultSecretKeySizeProvider();
private static final Map KEY_SIZES;
static
{
Map keySizes = new HashMap();
keySizes.put(new ASN1ObjectIdentifier("1.2.840.113533.7.66.10"), Integers.valueOf(128));
keySizes.put(PKCSObjectIdentifiers.des_EDE3_CBC, Integers.valueOf(192));
keySizes.put(NISTObjectIdentifiers.id_aes128_CBC, Integers.valueOf(128));
keySizes.put(NISTObjectIdentifiers.id_aes192_CBC, Integers.valueOf(192));
keySizes.put(NISTObjectIdentifiers.id_aes256_CBC, Integers.valueOf(256));
keySizes.put(NTTObjectIdentifiers.id_camellia128_cbc, Integers.valueOf(128));
keySizes.put(NTTObjectIdentifiers.id_camellia192_cbc, Integers.valueOf(192));
keySizes.put(NTTObjectIdentifiers.id_camellia256_cbc, Integers.valueOf(256));
keySizes.put(CryptoProObjectIdentifiers.gostR28147_gcfb, Integers.valueOf(256));
KEY_SIZES = Collections.unmodifiableMap(keySizes);
}
public int getKeySize(AlgorithmIdentifier algorithmIdentifier)
{
int keySize = getKeySize(algorithmIdentifier.getAlgorithm());
// just need the OID
if (keySize > 0)
{
return keySize;
}
// TODO: support OID/Parameter key sizes (e.g. RC2).
return -1;
}
public int getKeySize(ASN1ObjectIdentifier algorithm)
{
Integer keySize = (Integer)KEY_SIZES.get(algorithm);
if (keySize != null)
{
return keySize.intValue();
}
return -1;
}
}
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