vespa-athenz/src/main/java/com/yahoo/vespa/athenz/utils/AthenzIdentities.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
53
54
55
56
57
58
59
60
61
62
63
64

// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.athenz.utils;

import com.yahoo.security.X509CertificateUtils;
import com.yahoo.vespa.athenz.api.AthenzDomain;
import com.yahoo.vespa.athenz.api.AthenzIdentity;
import com.yahoo.vespa.athenz.api.AthenzService;
import com.yahoo.vespa.athenz.api.AthenzUser;

import java.security.cert.X509Certificate;
import java.util.List;

/**
 * @author bjorncs
 */
public class AthenzIdentities {

    private AthenzIdentities() {}

    public static final AthenzDomain USER_PRINCIPAL_DOMAIN = new AthenzDomain("user");
    public static final AthenzService ZMS_ATHENZ_SERVICE = new AthenzService("sys.auth", "zms");
    public static final AthenzService ZTS_ATHENZ_SERVICE = new AthenzService("sys.auth", "zts");

    public static AthenzIdentity from(AthenzDomain domain, String identityName) {
        if (domain.equals(USER_PRINCIPAL_DOMAIN)) {
            return AthenzUser.fromUserId(identityName);
        } else {
            return new AthenzService(domain, identityName);
        }
    }

    public static AthenzIdentity from(String fullName) {
        int domainIdentityNameSeparatorIndex = fullName.lastIndexOf('.');
        if (domainIdentityNameSeparatorIndex == -1
                || domainIdentityNameSeparatorIndex == 0
                || domainIdentityNameSeparatorIndex == fullName.length() - 1) {
            throw new IllegalArgumentException("Invalid Athenz identity: " + fullName);
        }
        AthenzDomain domain = new AthenzDomain(fullName.substring(0, domainIdentityNameSeparatorIndex));
        String identityName = fullName.substring(domainIdentityNameSeparatorIndex + 1);
        return from(domain, identityName);
    }

    public static AthenzIdentity from(X509Certificate certificate) {
        String commonName = getCommonName(certificate);
        if (isAthenzRoleIdentity(commonName)) {
            throw new IllegalArgumentException("Athenz role certificate not supported");
        }
        return from(commonName);
    }

    private static boolean isAthenzRoleIdentity(String commonName) {
        return commonName.contains(":role.");
    }

    private static String getCommonName(X509Certificate certificate) {
        List<String> commonNames = X509CertificateUtils.getSubjectCommonNames(certificate);
        if (commonNames.size() != 1) {
            String subjectName = certificate.getSubjectX500Principal().getName();
            throw new IllegalArgumentException("Expected single CN in certificate's subject: " + subjectName);
        }
        return commonNames.get(0);
    }
}