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package org.spongycastle.cert.crmf;
import java.io.IOException;
import java.io.OutputStream;
import org.spongycastle.asn1.ASN1Encoding;
import org.spongycastle.asn1.cmp.PBMParameter;
import org.spongycastle.asn1.crmf.PKMACValue;
import org.spongycastle.asn1.x509.SubjectPublicKeyInfo;
import org.spongycastle.operator.MacCalculator;
import org.spongycastle.util.Arrays;
class PKMACValueVerifier
{
private final PKMACBuilder builder;
public PKMACValueVerifier(PKMACBuilder builder)
{
this.builder = builder;
}
public boolean isValid(PKMACValue value, char[] password, SubjectPublicKeyInfo keyInfo)
throws CRMFException
{
builder.setParameters(PBMParameter.getInstance(value.getAlgId().getParameters()));
MacCalculator calculator = builder.build(password);
OutputStream macOut = calculator.getOutputStream();
try
{
macOut.write(keyInfo.getEncoded(ASN1Encoding.DER));
macOut.close();
}
catch (IOException e)
{
throw new CRMFException("exception encoding mac input: " + e.getMessage(), e);
}
return Arrays.areEqual(calculator.getMac(), value.getValue().getBytes());
}
}
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