vespa-athenz/src/main/java/com/yahoo/vespa/athenz/utils/ntoken/AthenzConfTruststore.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52

// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.athenz.utils.ntoken;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.yahoo.athenz.auth.util.Crypto;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Path;
import java.security.PublicKey;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

/**
 * A {@link AthenzTruststore} that is backed by athenz.conf
 *
 * @author bjorncs
 */
public class AthenzConfTruststore implements AthenzTruststore {

    private final Map<String, PublicKey> publicKeys;

    public AthenzConfTruststore(Path athenzConfFile) {
        this.publicKeys = loadPublicKeys(athenzConfFile);
    }

    @Override
    public Optional<PublicKey> getPublicKey(String keyId) {
        return Optional.of(publicKeys.get(keyId));
    }

    private static Map<String, PublicKey> loadPublicKeys(Path athenzConfFile) {
        try {
            Map<String, PublicKey> publicKeys = new HashMap<>();
            ObjectMapper mapper = new ObjectMapper();
            JsonNode root = mapper.readTree(athenzConfFile.toFile());
            ArrayNode keysArray = (ArrayNode) root.get("ztsPublicKeys");
            for (JsonNode keyEntry : keysArray) {
                String keyId = keyEntry.get("id").textValue();
                String encodedPublicKey = keyEntry.get("key").textValue();
                PublicKey publicKey = Crypto.loadPublicKey(Crypto.ybase64DecodeString(encodedPublicKey));
                publicKeys.put(keyId, publicKey);
            }
            return publicKeys;
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
}