bcpkix/src/main/java/org/bouncycastle/cert/path/validations/CertificatePoliciesValidation.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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

package org.bouncycastle.cert.path.validations;

import java.math.BigInteger;

import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.x509.Extension;
import org.bouncycastle.asn1.x509.PolicyConstraints;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.path.CertPathValidation;
import org.bouncycastle.cert.path.CertPathValidationContext;
import org.bouncycastle.cert.path.CertPathValidationException;
import org.bouncycastle.util.Memoable;

public class CertificatePoliciesValidation
    implements CertPathValidation
{
    private int              explicitPolicy;
    private int              policyMapping;
    private int              inhibitAnyPolicy;

    CertificatePoliciesValidation(int pathLength)
    {
        this(pathLength, false, false, false);
    }

    CertificatePoliciesValidation(int pathLength, boolean isExplicitPolicyRequired, boolean isAnyPolicyInhibited, boolean isPolicyMappingInhibited)
    {
        //
        // (d)
        //

        if (isExplicitPolicyRequired)
        {
            explicitPolicy = 0;
        }
        else
        {
            explicitPolicy = pathLength + 1;
        }

        //
        // (e)
        //
        if (isAnyPolicyInhibited)
        {
            inhibitAnyPolicy = 0;
        }
        else
        {
            inhibitAnyPolicy = pathLength + 1;
        }

        //
        // (f)
        //
        if (isPolicyMappingInhibited)
        {
            policyMapping = 0;
        }
        else
        {
            policyMapping = pathLength + 1;
        }
    }

    public void validate(CertPathValidationContext context, X509CertificateHolder certificate)
        throws CertPathValidationException
    {
        context.addHandledExtension(Extension.policyConstraints);
        context.addHandledExtension(Extension.inhibitAnyPolicy);

        if (!context.isEndEntity())
        {
            if (!ValidationUtils.isSelfIssued(certificate))
            {
                 //
                // H (1), (2), (3)
                //
                explicitPolicy = countDown(explicitPolicy);
                policyMapping = countDown(policyMapping);
                inhibitAnyPolicy = countDown(inhibitAnyPolicy);

                //
                // I (1), (2)
                //
                PolicyConstraints policyConstraints = PolicyConstraints.fromExtensions(certificate.getExtensions());

                if (policyConstraints != null)
                {
                    BigInteger requireExplicitPolicyMapping = policyConstraints.getRequireExplicitPolicyMapping();
                    if (requireExplicitPolicyMapping != null)
                    {
                        if (requireExplicitPolicyMapping.intValue() < explicitPolicy)
                        {
                            explicitPolicy = requireExplicitPolicyMapping.intValue();
                        }
                    }

                    BigInteger inhibitPolicyMapping = policyConstraints.getInhibitPolicyMapping();
                    if (inhibitPolicyMapping != null)
                    {
                        if (inhibitPolicyMapping.intValue() < policyMapping)
                        {
                            policyMapping = inhibitPolicyMapping.intValue();
                        }
                    }
                }

                //
                // J
                //
                Extension ext = certificate.getExtension(Extension.inhibitAnyPolicy);

                if (ext != null)
                {
                    int extValue = ASN1Integer.getInstance(ext.getParsedValue()).getValue().intValue();

                    if (extValue < inhibitAnyPolicy)
                    {
                        inhibitAnyPolicy = extValue;
                    }
                }
            }
        }
    }

    private int countDown(int policyCounter)
    {
        if (policyCounter != 0)
        {
            return policyCounter - 1;
        }

        return 0;
    }

    public Memoable copy()
    {
        return new CertificatePoliciesValidation(0);    // TODO:
    }

    public void reset(Memoable other)
    {
        CertificatePoliciesValidation v = (CertificatePoliciesValidation)other;      // TODO:
    }
}