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AsymmetricFingerprintDialog / src / com.example.android.asymmetricfingerprintdialog / server /

StoreBackend.java

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/*
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 * Copyright (C) 2015 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License
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 */
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package com.example.android.asymmetricfingerprintdialog.server;
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import java.security.PublicKey;
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/**
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 * An interface that defines the methods required for the store backend.
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 */
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public interface StoreBackend {
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    /**
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     * Verifies the authenticity of the provided transaction by confirming that it was signed with
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     * the private key enrolled for the userId.
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     *
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     * @param transaction          the contents of the purchase transaction, its contents are
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     *                             signed
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     *                             by the
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     *                             private key in the client side.
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     * @param transactionSignature the signature of the transaction's contents.
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     * @return true if the signedSignature was verified, false otherwise. If this method returns
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     * true, the server can consider the transaction is successful.
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     */
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    boolean verify(Transaction transaction, byte[] transactionSignature);
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    /**
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     * Verifies the authenticity of the provided transaction by password.
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     *
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     * @param transaction the contents of the purchase transaction, its contents are signed by the
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     *                    private key in the client side.
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     * @param password    the password for the user associated with the {@code transaction}.
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     * @return true if the password is verified.
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     */
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    boolean verify(Transaction transaction, String password);
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    /**
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     * Enrolls a public key associated with the userId
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     *
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     * @param userId    the unique ID of the user within the app including server side
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     *                  implementation
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     * @param password  the password for the user for the server side
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     * @param publicKey the public key object to verify the signature from the user
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     * @return true if the enrollment was successful, false otherwise
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     */
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    boolean enroll(String userId, String password, PublicKey publicKey);
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}
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