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

package com.google.crypto.tink.prf.internal;

import com.google.crypto.tink.internal.Util;
import com.google.crypto.tink.internal.MutableSerializationRegistry;
import com.google.crypto.tink.util.SecretBytes;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.ExtensionRegistryLite;
import com.google.crypto.tink.proto.KeyData;
import javax.annotation.Nullable;
import com.google.crypto.tink.SecretKeyAccess;
import com.google.crypto.tink.proto.OutputPrefixType;
import com.google.crypto.tink.proto.HkdfPrfKeyFormat;
import com.google.crypto.tink.proto.KeyTemplate;
import com.google.protobuf.ByteString;
import com.google.crypto.tink.proto.HkdfPrfParams;
import java.security.GeneralSecurityException;
import com.google.crypto.tink.proto.HashType;
import com.google.crypto.tink.internal.KeyParser;
import com.google.crypto.tink.internal.ProtoKeySerialization;
import com.google.crypto.tink.prf.HkdfPrfKey;
import com.google.crypto.tink.internal.KeySerializer;
import com.google.crypto.tink.internal.ParametersParser;
import com.google.crypto.tink.internal.ProtoParametersSerialization;
import com.google.crypto.tink.prf.HkdfPrfParameters;
import com.google.crypto.tink.internal.ParametersSerializer;
import com.google.crypto.tink.util.Bytes;
import com.google.crypto.tink.AccessesPartialKey;

@AccessesPartialKey
public final class HkdfPrfProtoSerialization
{
    private static final String TYPE_URL = "type.googleapis.com/google.crypto.tink.HkdfPrfKey";
    private static final Bytes TYPE_URL_BYTES;
    private static final ParametersSerializer<HkdfPrfParameters, ProtoParametersSerialization> PARAMETERS_SERIALIZER;
    private static final ParametersParser<ProtoParametersSerialization> PARAMETERS_PARSER;
    private static final KeySerializer<HkdfPrfKey, ProtoKeySerialization> KEY_SERIALIZER;
    private static final KeyParser<ProtoKeySerialization> KEY_PARSER;
    
    private static HashType toProtoHashType(final HkdfPrfParameters.HashType hashType) throws GeneralSecurityException {
        if (HkdfPrfParameters.HashType.SHA1.equals(hashType)) {
            return HashType.SHA1;
        }
        if (HkdfPrfParameters.HashType.SHA224.equals(hashType)) {
            return HashType.SHA224;
        }
        if (HkdfPrfParameters.HashType.SHA256.equals(hashType)) {
            return HashType.SHA256;
        }
        if (HkdfPrfParameters.HashType.SHA384.equals(hashType)) {
            return HashType.SHA384;
        }
        if (HkdfPrfParameters.HashType.SHA512.equals(hashType)) {
            return HashType.SHA512;
        }
        throw new GeneralSecurityException("Unable to serialize HashType " + hashType);
    }
    
    private static HkdfPrfParameters.HashType toHashType(final HashType hashType) throws GeneralSecurityException {
        switch (hashType) {
            case SHA1: {
                return HkdfPrfParameters.HashType.SHA1;
            }
            case SHA224: {
                return HkdfPrfParameters.HashType.SHA224;
            }
            case SHA256: {
                return HkdfPrfParameters.HashType.SHA256;
            }
            case SHA384: {
                return HkdfPrfParameters.HashType.SHA384;
            }
            case SHA512: {
                return HkdfPrfParameters.HashType.SHA512;
            }
            default: {
                throw new GeneralSecurityException("Unable to parse HashType: " + hashType.getNumber());
            }
        }
    }
    
    private static HkdfPrfParams getProtoParams(final HkdfPrfParameters parameters) throws GeneralSecurityException {
        final HkdfPrfParams.Builder builder = HkdfPrfParams.newBuilder().setHash(toProtoHashType(parameters.getHashType()));
        if (parameters.getSalt() != null && parameters.getSalt().size() > 0) {
            builder.setSalt(ByteString.copyFrom(parameters.getSalt().toByteArray()));
        }
        return builder.build();
    }
    
    private static ProtoParametersSerialization serializeParameters(final HkdfPrfParameters parameters) throws GeneralSecurityException {
        return ProtoParametersSerialization.create(KeyTemplate.newBuilder().setTypeUrl("type.googleapis.com/google.crypto.tink.HkdfPrfKey").setValue(HkdfPrfKeyFormat.newBuilder().setParams(getProtoParams(parameters)).setKeySize(parameters.getKeySizeBytes()).build().toByteString()).setOutputPrefixType(OutputPrefixType.RAW).build());
    }
    
    private static ProtoKeySerialization serializeKey(final HkdfPrfKey key, @Nullable final SecretKeyAccess access) throws GeneralSecurityException {
        return ProtoKeySerialization.create("type.googleapis.com/google.crypto.tink.HkdfPrfKey", com.google.crypto.tink.proto.HkdfPrfKey.newBuilder().setParams(getProtoParams(key.getParameters())).setKeyValue(ByteString.copyFrom(key.getKeyBytes().toByteArray(SecretKeyAccess.requireAccess(access)))).build().toByteString(), KeyData.KeyMaterialType.SYMMETRIC, OutputPrefixType.RAW, key.getIdRequirementOrNull());
    }
    
    private static HkdfPrfParameters parseParameters(final ProtoParametersSerialization serialization) throws GeneralSecurityException {
        if (!serialization.getKeyTemplate().getTypeUrl().equals("type.googleapis.com/google.crypto.tink.HkdfPrfKey")) {
            throw new IllegalArgumentException("Wrong type URL in call to HkdfPrfProtoSerialization.parseParameters: " + serialization.getKeyTemplate().getTypeUrl());
        }
        HkdfPrfKeyFormat format;
        try {
            format = HkdfPrfKeyFormat.parseFrom(serialization.getKeyTemplate().getValue(), ExtensionRegistryLite.getEmptyRegistry());
        }
        catch (final InvalidProtocolBufferException e) {
            throw new GeneralSecurityException("Parsing HkdfPrfParameters failed: ", e);
        }
        if (format.getVersion() != 0) {
            throw new GeneralSecurityException("Parsing HkdfPrfParameters failed: unknown Version " + format.getVersion());
        }
        if (serialization.getKeyTemplate().getOutputPrefixType() != OutputPrefixType.RAW) {
            throw new GeneralSecurityException("Parsing HkdfPrfParameters failed: only RAW output prefix type is accepted");
        }
        return HkdfPrfParameters.builder().setKeySizeBytes(format.getKeySize()).setHashType(toHashType(format.getParams().getHash())).setSalt(Bytes.copyFrom(format.getParams().getSalt().toByteArray())).build();
    }
    
    private static HkdfPrfKey parseKey(final ProtoKeySerialization serialization, @Nullable final SecretKeyAccess access) throws GeneralSecurityException {
        if (!serialization.getTypeUrl().equals("type.googleapis.com/google.crypto.tink.HkdfPrfKey")) {
            throw new IllegalArgumentException("Wrong type URL in call to HkdfPrfProtoSerialization.parseKey");
        }
        try {
            final com.google.crypto.tink.proto.HkdfPrfKey protoKey = com.google.crypto.tink.proto.HkdfPrfKey.parseFrom(serialization.getValue(), ExtensionRegistryLite.getEmptyRegistry());
            if (protoKey.getVersion() != 0) {
                throw new GeneralSecurityException("Only version 0 keys are accepted");
            }
            if (serialization.getIdRequirementOrNull() != null) {
                throw new GeneralSecurityException("ID requirement must be null.");
            }
            final HkdfPrfParameters parameters = HkdfPrfParameters.builder().setKeySizeBytes(protoKey.getKeyValue().size()).setHashType(toHashType(protoKey.getParams().getHash())).setSalt(Bytes.copyFrom(protoKey.getParams().getSalt().toByteArray())).build();
            return HkdfPrfKey.builder().setParameters(parameters).setKeyBytes(SecretBytes.copyFrom(protoKey.getKeyValue().toByteArray(), SecretKeyAccess.requireAccess(access))).build();
        }
        catch (final InvalidProtocolBufferException | IllegalArgumentException e) {
            throw new GeneralSecurityException("Parsing HkdfPrfKey failed");
        }
    }
    
    public static void register() throws GeneralSecurityException {
        register(MutableSerializationRegistry.globalInstance());
    }
    
    public static void register(final MutableSerializationRegistry registry) throws GeneralSecurityException {
        registry.registerParametersSerializer(HkdfPrfProtoSerialization.PARAMETERS_SERIALIZER);
        registry.registerParametersParser(HkdfPrfProtoSerialization.PARAMETERS_PARSER);
        registry.registerKeySerializer(HkdfPrfProtoSerialization.KEY_SERIALIZER);
        registry.registerKeyParser(HkdfPrfProtoSerialization.KEY_PARSER);
    }
    
    private HkdfPrfProtoSerialization() {
    }
    
    static {
        TYPE_URL_BYTES = Util.toBytesFromPrintableAscii("type.googleapis.com/google.crypto.tink.HkdfPrfKey");
        PARAMETERS_SERIALIZER = ParametersSerializer.create(HkdfPrfProtoSerialization::serializeParameters, HkdfPrfParameters.class, ProtoParametersSerialization.class);
        PARAMETERS_PARSER = ParametersParser.create(HkdfPrfProtoSerialization::parseParameters, HkdfPrfProtoSerialization.TYPE_URL_BYTES, ProtoParametersSerialization.class);
        KEY_SERIALIZER = KeySerializer.create(HkdfPrfProtoSerialization::serializeKey, HkdfPrfKey.class, ProtoKeySerialization.class);
        KEY_PARSER = KeyParser.create(HkdfPrfProtoSerialization::parseKey, HkdfPrfProtoSerialization.TYPE_URL_BYTES, ProtoKeySerialization.class);
    }
}