org.apache.james.blob.objectstorage.AESPayloadCodec.java Source code

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Here is the source code for org.apache.james.blob.objectstorage.AESPayloadCodec.java

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package org.apache.james.blob.objectstorage;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.security.GeneralSecurityException;

import org.apache.commons.io.IOUtils;
import org.apache.james.blob.objectstorage.crypto.CryptoConfig;
import org.apache.james.blob.objectstorage.crypto.PBKDF2StreamingAeadFactory;
import org.jclouds.io.Payload;
import org.jclouds.io.Payloads;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.crypto.tink.subtle.AesGcmHkdfStreaming;

public class AESPayloadCodec implements PayloadCodec {
    private static final Logger LOGGER = LoggerFactory.getLogger(AESPayloadCodec.class);
    private final AesGcmHkdfStreaming streamingAead;

    public AESPayloadCodec(CryptoConfig cryptoConfig) {
        streamingAead = PBKDF2StreamingAeadFactory.newAesGcmHkdfStreaming(cryptoConfig);
    }

    @Override
    public Payload write(InputStream is) {
        PipedInputStream snk = new PipedInputStream();
        try {
            PipedOutputStream src = new PipedOutputStream(snk);
            OutputStream outputStream = streamingAead.newEncryptingStream(src,
                    PBKDF2StreamingAeadFactory.EMPTY_ASSOCIATED_DATA);
            Thread copyThread = new Thread(() -> {
                try (OutputStream stream = outputStream) {
                    IOUtils.copy(is, stream);
                } catch (IOException e) {
                    throw new RuntimeException("Stream copy failure ", e);
                }
            });
            copyThread.setUncaughtExceptionHandler(
                    (Thread t, Throwable e) -> LOGGER.error("Unable to encrypt payload's input stream", e));
            copyThread.start();
            return Payloads.newInputStreamPayload(snk);
        } catch (IOException | GeneralSecurityException e) {
            throw new RuntimeException("Unable to build payload for object storage, failed to " + "encrypt", e);
        }
    }

    @Override
    public InputStream read(Payload payload) throws IOException {
        try {
            return streamingAead.newDecryptingStream(payload.openStream(),
                    PBKDF2StreamingAeadFactory.EMPTY_ASSOCIATED_DATA);
        } catch (GeneralSecurityException e) {
            throw new IOException("Incorrect crypto setup", e);
        }
    }

}