// 
// Decompiled by Procyon v0.6.0
// 

package com.google.crypto.tink.aead;

import com.google.crypto.tink.Parameters;
import java.util.Objects;
import com.google.crypto.tink.Key;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import javax.annotation.Nullable;
import com.google.crypto.tink.util.Bytes;

public final class LegacyKmsAeadKey extends AeadKey
{
    private final LegacyKmsAeadParameters parameters;
    private final Bytes outputPrefix;
    @Nullable
    private final Integer idRequirement;
    
    private LegacyKmsAeadKey(final LegacyKmsAeadParameters parameters, final Bytes outputPrefix, @Nullable final Integer idRequirement) {
        this.parameters = parameters;
        this.outputPrefix = outputPrefix;
        this.idRequirement = idRequirement;
    }
    
    public static LegacyKmsAeadKey create(final LegacyKmsAeadParameters parameters, @Nullable final Integer idRequirement) throws GeneralSecurityException {
        Bytes outputPrefix;
        if (parameters.variant() == LegacyKmsAeadParameters.Variant.TINK) {
            if (idRequirement == null) {
                throw new GeneralSecurityException("For given Variant TINK the value of idRequirement must be non-null");
            }
            outputPrefix = Bytes.copyFrom(ByteBuffer.allocate(5).put((byte)1).putInt(idRequirement).array());
        }
        else {
            if (parameters.variant() != LegacyKmsAeadParameters.Variant.NO_PREFIX) {
                throw new GeneralSecurityException("Unknown Variant: " + parameters.variant());
            }
            if (idRequirement != null) {
                throw new GeneralSecurityException("For given Variant NO_PREFIX the value of idRequirement must be null");
            }
            outputPrefix = Bytes.copyFrom(new byte[0]);
        }
        return new LegacyKmsAeadKey(parameters, outputPrefix, idRequirement);
    }
    
    public static LegacyKmsAeadKey create(final LegacyKmsAeadParameters parameters) throws GeneralSecurityException {
        return create(parameters, null);
    }
    
    @Override
    public Bytes getOutputPrefix() {
        return this.outputPrefix;
    }
    
    @Override
    public LegacyKmsAeadParameters getParameters() {
        return this.parameters;
    }
    
    @Override
    public Integer getIdRequirementOrNull() {
        return this.idRequirement;
    }
    
    @Override
    public boolean equalsKey(final Key o) {
        if (!(o instanceof LegacyKmsAeadKey)) {
            return false;
        }
        final LegacyKmsAeadKey that = (LegacyKmsAeadKey)o;
        return that.parameters.equals(this.parameters) && Objects.equals(that.idRequirement, this.idRequirement);
    }
}