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

package com.google.crypto.tink.aead;

import com.google.protobuf.MessageLite;
import com.google.protobuf.Parser;
import com.google.crypto.tink.internal.LegacyKeyManagerImpl;
import com.google.crypto.tink.proto.KeyData;
import com.google.crypto.tink.subtle.AesGcmJce;
import com.google.crypto.tink.internal.TinkBugException;
import com.google.crypto.tink.KeyTemplate;
import com.google.crypto.tink.internal.KeyManagerRegistry;
import com.google.crypto.tink.internal.MutableKeyCreationRegistry;
import com.google.crypto.tink.internal.MutableParametersRegistry;
import com.google.crypto.tink.internal.MutablePrimitiveRegistry;
import com.google.crypto.tink.aead.internal.AesGcmProtoSerialization;
import com.google.crypto.tink.util.SecretBytes;
import com.google.crypto.tink.AccessesPartialKey;
import com.google.crypto.tink.internal.Util;
import com.google.crypto.tink.SecretKeyAccess;
import javax.annotation.Nullable;
import java.io.InputStream;
import java.util.Collections;
import java.util.HashMap;
import com.google.crypto.tink.Parameters;
import java.util.Map;
import java.security.GeneralSecurityException;
import com.google.crypto.tink.config.internal.TinkFipsUtil;
import com.google.crypto.tink.internal.KeyCreator;
import com.google.crypto.tink.internal.MutableKeyDerivationRegistry;
import com.google.crypto.tink.KeyManager;
import com.google.crypto.tink.Aead;
import com.google.crypto.tink.internal.PrimitiveConstructor;

public final class AesGcmKeyManager
{
    private static final PrimitiveConstructor<AesGcmKey, Aead> AES_GCM_PRIMITIVE_CONSTRUCTOR;
    private static final KeyManager<Aead> legacyKeyManager;
    private static final MutableKeyDerivationRegistry.InsecureKeyCreator<AesGcmParameters> KEY_DERIVER;
    private static final KeyCreator<AesGcmParameters> KEY_CREATOR;
    private static final TinkFipsUtil.AlgorithmFipsCompatibility FIPS;
    
    private static final void validate(final AesGcmParameters parameters) throws GeneralSecurityException {
        if (parameters.getKeySizeBytes() == 24) {
            throw new GeneralSecurityException("192 bit AES GCM Parameters are not valid");
        }
    }
    
    static String getKeyType() {
        return "type.googleapis.com/google.crypto.tink.AesGcmKey";
    }
    
    private static Map<String, Parameters> namedParameters() throws GeneralSecurityException {
        final Map<String, Parameters> result = new HashMap<String, Parameters>();
        result.put("AES128_GCM", PredefinedAeadParameters.AES128_GCM);
        result.put("AES128_GCM_RAW", AesGcmParameters.builder().setIvSizeBytes(12).setKeySizeBytes(16).setTagSizeBytes(16).setVariant(AesGcmParameters.Variant.NO_PREFIX).build());
        result.put("AES256_GCM", PredefinedAeadParameters.AES256_GCM);
        result.put("AES256_GCM_RAW", AesGcmParameters.builder().setIvSizeBytes(12).setKeySizeBytes(32).setTagSizeBytes(16).setVariant(AesGcmParameters.Variant.NO_PREFIX).build());
        return Collections.unmodifiableMap((Map<? extends String, ? extends Parameters>)result);
    }
    
    @AccessesPartialKey
    static AesGcmKey createAesGcmKeyFromRandomness(final AesGcmParameters parameters, final InputStream stream, @Nullable final Integer idRequirement, final SecretKeyAccess access) throws GeneralSecurityException {
        validate(parameters);
        return AesGcmKey.builder().setParameters(parameters).setIdRequirement(idRequirement).setKeyBytes(Util.readIntoSecretBytes(stream, parameters.getKeySizeBytes(), access)).build();
    }
    
    @AccessesPartialKey
    private static AesGcmKey createAesGcmKey(final AesGcmParameters parameters, @Nullable final Integer idRequirement) throws GeneralSecurityException {
        validate(parameters);
        return AesGcmKey.builder().setParameters(parameters).setIdRequirement(idRequirement).setKeyBytes(SecretBytes.randomBytes(parameters.getKeySizeBytes())).build();
    }
    
    public static void register(final boolean newKeyAllowed) throws GeneralSecurityException {
        if (!AesGcmKeyManager.FIPS.isCompatible()) {
            throw new GeneralSecurityException("Can not use AES-GCM in FIPS-mode, as BoringCrypto module is not available.");
        }
        AesGcmProtoSerialization.register();
        MutablePrimitiveRegistry.globalInstance().registerPrimitiveConstructor(AesGcmKeyManager.AES_GCM_PRIMITIVE_CONSTRUCTOR);
        MutableParametersRegistry.globalInstance().putAll(namedParameters());
        MutableKeyDerivationRegistry.globalInstance().add(AesGcmKeyManager.KEY_DERIVER, AesGcmParameters.class);
        MutableKeyCreationRegistry.globalInstance().add(AesGcmKeyManager.KEY_CREATOR, AesGcmParameters.class);
        KeyManagerRegistry.globalInstance().registerKeyManagerWithFipsCompatibility(AesGcmKeyManager.legacyKeyManager, AesGcmKeyManager.FIPS, newKeyAllowed);
    }
    
    public static final KeyTemplate aes128GcmTemplate() {
        return TinkBugException.exceptionIsBug(() -> KeyTemplate.createFrom(AesGcmParameters.builder().setIvSizeBytes(12).setKeySizeBytes(16).setTagSizeBytes(16).setVariant(AesGcmParameters.Variant.TINK).build()));
    }
    
    public static final KeyTemplate rawAes128GcmTemplate() {
        return TinkBugException.exceptionIsBug(() -> KeyTemplate.createFrom(AesGcmParameters.builder().setIvSizeBytes(12).setKeySizeBytes(16).setTagSizeBytes(16).setVariant(AesGcmParameters.Variant.NO_PREFIX).build()));
    }
    
    public static final KeyTemplate aes256GcmTemplate() {
        return TinkBugException.exceptionIsBug(() -> KeyTemplate.createFrom(AesGcmParameters.builder().setIvSizeBytes(12).setKeySizeBytes(32).setTagSizeBytes(16).setVariant(AesGcmParameters.Variant.TINK).build()));
    }
    
    public static final KeyTemplate rawAes256GcmTemplate() {
        return TinkBugException.exceptionIsBug(() -> KeyTemplate.createFrom(AesGcmParameters.builder().setIvSizeBytes(12).setKeySizeBytes(32).setTagSizeBytes(16).setVariant(AesGcmParameters.Variant.NO_PREFIX).build()));
    }
    
    private AesGcmKeyManager() {
    }
    
    static {
        AES_GCM_PRIMITIVE_CONSTRUCTOR = PrimitiveConstructor.create(AesGcmJce::create, AesGcmKey.class, Aead.class);
        legacyKeyManager = LegacyKeyManagerImpl.create(getKeyType(), Aead.class, KeyData.KeyMaterialType.SYMMETRIC, com.google.crypto.tink.proto.AesGcmKey.parser());
        KEY_DERIVER = AesGcmKeyManager::createAesGcmKeyFromRandomness;
        KEY_CREATOR = AesGcmKeyManager::createAesGcmKey;
        FIPS = TinkFipsUtil.AlgorithmFipsCompatibility.ALGORITHM_REQUIRES_BORINGCRYPTO;
    }
}