106 lines
3.9 KiB
Java
106 lines
3.9 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.pgp;
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import android.net.Uri;
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import android.os.Parcelable;
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import androidx.annotation.Nullable;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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import com.google.auto.value.AutoValue;
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/**
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* This parcel stores the input of one or more PgpSignEncrypt operations.
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* All operations will use the same general parameters, differing only in
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* input and output. Each input/output set depends on the parameters:
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* <p/>
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* - Each input uri is individually encrypted/signed
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* - If a byte array is supplied, it is treated as an input before uris are processed
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* - The number of output uris must match the number of input uris, plus one more
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* if there is a byte array present.
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* - Once the output uris are empty, there must be exactly one input (uri xor bytes)
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* left, which will be returned in a byte array as part of the result parcel.
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*/
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@AutoValue
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public abstract class SignEncryptParcel implements Parcelable {
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public abstract PgpSignEncryptData getSignEncryptData();
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public abstract List<Uri> getInputUris();
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public abstract List<Uri> getOutputUris();
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@SuppressWarnings("mutable")
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@Nullable
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public abstract byte[] getBytes();
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public boolean isIncomplete() {
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List<Uri> inputUris = getInputUris();
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List<Uri> outputUris = getOutputUris();
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if (inputUris == null || outputUris == null) {
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throw new IllegalStateException("Invalid operation for bytes-backed SignEncryptParcel!");
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}
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return inputUris.size() > outputUris.size();
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}
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public static SignEncryptParcel createSignEncryptParcel(PgpSignEncryptData signEncryptData, byte[] bytes) {
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// noinspection unchecked, it's ok for the empty list
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return new AutoValue_SignEncryptParcel(signEncryptData, Collections.EMPTY_LIST, Collections.EMPTY_LIST, bytes);
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}
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public static Builder builder(SignEncryptParcel signEncryptParcel) {
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return new Builder(signEncryptParcel.getSignEncryptData())
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.addInputUris(signEncryptParcel.getInputUris())
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.addOutputUris(signEncryptParcel.getOutputUris());
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}
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public static Builder builder(PgpSignEncryptData signEncryptData) {
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return new Builder(signEncryptData);
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}
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public static class Builder {
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private final PgpSignEncryptData signEncryptData;
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private ArrayList<Uri> inputUris = new ArrayList<>();
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private ArrayList<Uri> outputUris = new ArrayList<>();
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private Builder(PgpSignEncryptData signEncryptData) {
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this.signEncryptData = signEncryptData;
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}
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public SignEncryptParcel build() {
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return new AutoValue_SignEncryptParcel(signEncryptData,
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Collections.unmodifiableList(inputUris),
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Collections.unmodifiableList(outputUris),
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null);
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}
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public Builder addOutputUris(Collection<Uri> outputUris) {
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this.outputUris.addAll(outputUris);
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return this;
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}
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public Builder addInputUris(Collection<Uri> inputUris) {
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this.inputUris.addAll(inputUris);
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return this;
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}
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}
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}
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