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Delegated targets should be loaded at target search time, so keep state in memory so we can use it as necessary. Signed-off-by: Appu Goundan <[email protected]>
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sigstore-java/src/main/java/dev/sigstore/tuf/TrustedMeta.java
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| /* | ||
| * Copyright 2024 The Sigstore Authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package dev.sigstore.tuf; | ||
|
|
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| import dev.sigstore.tuf.model.Root; | ||
| import dev.sigstore.tuf.model.RootRole; | ||
| import dev.sigstore.tuf.model.Snapshot; | ||
| import dev.sigstore.tuf.model.Targets; | ||
| import dev.sigstore.tuf.model.Timestamp; | ||
| import java.io.IOException; | ||
| import java.util.Optional; | ||
|
|
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| // An in memory cache that will pass through to a provided local tuf store | ||
| class TrustedMeta { | ||
| private final MutableTufStore localStore; | ||
| private Root root; | ||
| private Snapshot snapshot; | ||
| private Timestamp timestamp; | ||
| private Targets targets; | ||
|
|
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| private TrustedMeta(MutableTufStore localStore) { | ||
| this.localStore = localStore; | ||
| } | ||
|
|
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| static TrustedMeta newTrustedMeta(MutableTufStore localStore) { | ||
| return new TrustedMeta(localStore); | ||
| } | ||
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| public void setRoot(Root root) throws IOException { | ||
| // call storeTrustedRoot instead of generic storeMeta because it does doesn't extra work | ||
| localStore.storeTrustedRoot(root); | ||
| this.root = root; | ||
| } | ||
|
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| public Root getRoot() throws IOException { | ||
| return findRoot().orElseThrow(() -> new IllegalStateException("No cached root to load")); | ||
| } | ||
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| public Optional<Root> findRoot() throws IOException { | ||
| if (root == null) { | ||
| root = localStore.loadTrustedRoot().orElse(null); | ||
| } | ||
| return Optional.ofNullable(root); | ||
| } | ||
|
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| public void setTimestamp(Timestamp timestamp) throws IOException { | ||
| localStore.storeMeta(RootRole.TIMESTAMP, timestamp); | ||
| this.timestamp = timestamp; | ||
| } | ||
|
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| public Timestamp getTimestamp() throws IOException { | ||
| return findTimestamp() | ||
| .orElseThrow(() -> new IllegalStateException("No cached timestamp to load")); | ||
| } | ||
|
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| public Optional<Timestamp> findTimestamp() throws IOException { | ||
| if (timestamp == null) { | ||
| timestamp = localStore.loadTimestamp().orElse(null); | ||
| } | ||
| return Optional.ofNullable(timestamp); | ||
| } | ||
|
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| public void setSnapshot(Snapshot snapshot) throws IOException { | ||
| localStore.storeMeta(RootRole.SNAPSHOT, snapshot); | ||
| this.snapshot = snapshot; | ||
| } | ||
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| public Snapshot getSnapshot() throws IOException { | ||
| return findSnapshot() | ||
| .orElseThrow(() -> new IllegalStateException("No cached snapshot to load")); | ||
| } | ||
|
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| public Optional<Snapshot> findSnapshot() throws IOException { | ||
| if (snapshot == null) { | ||
| snapshot = localStore.loadSnapshot().orElse(null); | ||
| } | ||
| return Optional.ofNullable(snapshot); | ||
| } | ||
|
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| public void setTargets(Targets targets) throws IOException { | ||
| localStore.storeMeta(RootRole.TARGETS, targets); | ||
| this.targets = targets; | ||
| } | ||
|
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| public Targets getTargets() throws IOException { | ||
| return findTargets().orElseThrow(() -> new IllegalStateException("No cached targets to load")); | ||
| } | ||
|
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| public Optional<Targets> findTargets() throws IOException { | ||
| if (targets == null) { | ||
| targets = localStore.loadTargets().orElse(null); | ||
| } | ||
| return Optional.ofNullable(targets); | ||
| } | ||
|
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| public void clearMetaDueToKeyRotation() throws IOException { | ||
| localStore.clearMetaDueToKeyRotation(); | ||
| timestamp = null; | ||
| snapshot = null; | ||
| } | ||
| } |
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