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package org.bouncycastle.cms;

import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

public interface PasswordRecipient
    extends Recipient
{
    public static final int PKCS5_SCHEME2 = 0;
    public static final int PKCS5_SCHEME2_UTF8 = 1;

    static final class PRF
    {
        public static final PRF HMacSHA1 = new PRF("HMacSHA1", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA1, DERNull.INSTANCE));
        public static final PRF HMacSHA224 = new PRF("HMacSHA224", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA224, DERNull.INSTANCE));
        public static final PRF HMacSHA256 = new PRF("HMacSHA256", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA256, DERNull.INSTANCE));
        public static final PRF HMacSHA384 = new PRF("HMacSHA384", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA384, DERNull.INSTANCE));
        public static final PRF HMacSHA512 = new PRF("HMacSHA512", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA512, DERNull.INSTANCE));

        private final String hmac;
        final AlgorithmIdentifier prfAlgID;

        private PRF(String hmac, AlgorithmIdentifier prfAlgID)
        {
            this.hmac = hmac;
            this.prfAlgID = prfAlgID;
        }

        public String getName()
        {
            return hmac;
        }

        public AlgorithmIdentifier getAlgorithmID()
        {
            return prfAlgID;
        }
    }

    byte[] calculateDerivedKey(int schemeID, AlgorithmIdentifier derivationAlgorithm, int keySize)
        throws CMSException;

    RecipientOperator getRecipientOperator(AlgorithmIdentifier keyEncryptionAlgorithm, AlgorithmIdentifier contentEncryptionAlgorithm, byte[] derivedKey, byte[] encryptedEncryptedContentKey)
        throws CMSException;

    int getPasswordConversionScheme();

    char[] getPassword();
}