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package org.spongycastle.openpgp.operator.jcajce;
import java.io.IOException;
import java.io.OutputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.spongycastle.bcpg.HashAlgorithmTags;
import org.spongycastle.openpgp.operator.PGPDigestCalculator;
class SHA1PGPDigestCalculator
implements PGPDigestCalculator
{
private MessageDigest digest;
SHA1PGPDigestCalculator()
{
try
{
digest = MessageDigest.getInstance("SHA1");
}
catch (NoSuchAlgorithmException e)
{
throw new IllegalStateException("cannot find SHA-1: " + e.getMessage());
}
}
public int getAlgorithm()
{
return HashAlgorithmTags.SHA1;
}
public OutputStream getOutputStream()
{
return new DigestOutputStream(digest);
}
public byte[] getDigest()
{
return digest.digest();
}
public void reset()
{
digest.reset();
}
private class DigestOutputStream
extends OutputStream
{
private MessageDigest dig;
DigestOutputStream(MessageDigest dig)
{
this.dig = dig;
}
public void write(byte[] bytes, int off, int len)
throws IOException
{
dig.update(bytes, off, len);
}
public void write(byte[] bytes)
throws IOException
{
dig.update(bytes);
}
public void write(int b)
throws IOException
{
dig.update((byte)b);
}
byte[] getDigest()
{
return dig.digest();
}
}
}
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