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A web service test double for all occasions

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package com.github.tomakehurst.wiremock.common.ssl;

import com.github.tomakehurst.wiremock.common.Source;
import com.google.common.io.ByteStreams;
import org.apache.commons.codec.digest.DigestUtils;

import javax.xml.bind.DatatypeConverter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
import java.util.Arrays;
import java.util.Objects;

import static com.github.tomakehurst.wiremock.common.Exceptions.throwUnchecked;

public abstract class KeyStoreSource implements Source {

    protected final String keyStoreType;
    protected final char[] keyStorePassword;

    protected KeyStoreSource(String keyStoreType, char[] keyStorePassword) {
        this.keyStoreType = keyStoreType;
        this.keyStorePassword = keyStorePassword;
    }

    public KeyStore load() {
        InputStream instream = null;
        try {
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
            instream = createInputStream();
            trustStore.load(instream, keyStorePassword);
            return trustStore;
        } catch (Exception e) {
            return throwUnchecked(e, KeyStore.class);
        } finally {
            if (instream != null) {
                try {
                    instream.close();
                } catch (IOException ioe) {
                    throwUnchecked(ioe);
                }
            }
        }
    }

    protected abstract InputStream createInputStream();

    public String getKeyStoreType() {
        return keyStoreType;
    }

    public String getKeyStorePassword() {
        return new String(keyStorePassword);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        KeyStoreSource that = (KeyStoreSource) o;
        return keyStoreType.equals(that.keyStoreType) &&
                Arrays.equals(keyStorePassword, that.keyStorePassword);
    }

    @Override
    public int hashCode() {
        int result = Objects.hash(keyStoreType);
        result = 31 * result + Arrays.hashCode(keyStorePassword);
        return result;
    }
}