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Bibliotek som inneholder funksjonalitet for streaming av ASIC-E pakker

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package no.ks.fiks.io.asice;

import no.ks.fiks.io.asice.model.Content;
import no.ks.fiks.io.asice.read.EncryptedAsicReader;
import no.ks.fiks.io.asice.write.EncryptedAsicWriter;

import java.io.InputStream;
import java.nio.file.Path;
import java.security.PrivateKey;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.zip.ZipInputStream;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Implementation of AsicE handling
 */
class AsicHandlerImpl implements AsicHandler {
    static final String ERROR_MISSING_PRIVATE_KEY = "Privatnøkkel er ikke definert. Kan ikke dekryptere";
    private final List privateKeys;
    private final EncryptedAsicWriter encryptedAsicWriter;
    private final EncryptedAsicReader encryptedAsicReader;

    AsicHandlerImpl(final List privateKeys,
                    final EncryptedAsicWriter encryptedAsicWriter,
                    final EncryptedAsicReader encryptedAsicReader) {
        this.privateKeys = privateKeys;

        checkNotNull(encryptedAsicWriter);
        this.encryptedAsicWriter = encryptedAsicWriter;

        checkNotNull(encryptedAsicReader);
        this.encryptedAsicReader = encryptedAsicReader;
    }

    @Override
    public InputStream encrypt(final X509Certificate mottakerCert, final List payload) {
        checkNotNull(mottakerCert);
        checkNotNull(payload);
        return encryptedAsicWriter.createAndEncrypt(mottakerCert, payload);
    }

    @Override
    public ZipInputStream decrypt(final InputStream encryptedAsicData) {
        if(null == privateKeys || privateKeys.isEmpty()) {
            throw new IllegalStateException(ERROR_MISSING_PRIVATE_KEY);
        }
        checkNotNull(encryptedAsicData);
        return encryptedAsicReader.decrypt(encryptedAsicData, privateKeys);
    }

    @Override
    public void writeDecrypted(final InputStream encryptedAsicData, final Path targetPath) {
        if(null == privateKeys || privateKeys.isEmpty()) {
            throw new IllegalStateException(ERROR_MISSING_PRIVATE_KEY);
        }
        checkNotNull(encryptedAsicData);
        checkNotNull(targetPath);
        encryptedAsicReader.writeDecryptedToPath(encryptedAsicData, privateKeys, targetPath);
    }

    @Override
    public void close() throws Exception {
        encryptedAsicWriter.close();
    }


}