source: fedd/abac-src/ttg/credential/RtmlEngine.java @ df783c1

axis_examplecompt_changesinfo-opsversion-2.00version-3.01version-3.02
Last change on this file since df783c1 was 8780cbec, checked in by Jay Jacobs <Jay.Jacobs@…>, 15 years ago

ABAC sources from Cobham

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File size: 5.4 KB
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[8780cbec]1package com.nailabs.abac.credential;
2
3import java.io.File;
4import java.io.FileInputStream;
5import java.util.Iterator;
6import java.util.HashSet;
7import java.util.HashMap;
8import java.util.Hashtable;
9import java.util.Collection;
10import java.security.PublicKey;
11import edu.stanford.peer.rbtm.util.Predicate;
12import edu.stanford.peer.rbtm.credential.Entity;
13import edu.stanford.peer.rbtm.credential.EntityExpression;
14import edu.stanford.peer.rbtm.credential.Role;
15import edu.stanford.peer.rbtm.credential.RoleName;
16import edu.stanford.peer.rbtm.credential.SimpleEntity;
17import edu.stanford.peer.rbtm.credential.LinkedRole;
18import edu.stanford.peer.rbtm.credential.StaticCredential;
19
20import edu.stanford.peer.rbtm.engine.*;
21
22import edu.stanford.rt.credential.*;
23import edu.stanford.rt.parser.RTParser;
24
25/**
26 * An RTML-aware GraphEngine, formerly known as CredentialManager.
27 */
28public class RtmlEngine extends GraphEngine  {
29    /** internal store of parsed RTML */
30    protected CredentialStore store;
31
32    /** static credential to credential domain mapping */
33    protected HashMap indexByDomains = new HashMap();
34
35    /** internal cache of entity hash id to short name mapping */
36    private static Hashtable entityCache = new Hashtable(10); 
37
38    public RtmlEngine() {
39        super();
40    }
41
42    /** default constructor used for the opponents transmitted credentials*/
43    public RtmlEngine(CredentialStore store) {
44        super();
45        this.store = store;
46        importDomains(store);
47    }
48
49    /** predicated constructor used by oppo, sens, and simp frontiers */
50    public RtmlEngine(CredentialStore store, Predicate p) {
51        super(p);
52        this.store = store;
53        importDomains(store);
54    }
55
56    /** convenience method for looking up a shortname from a credential hash */
57    public static String getShortName(String hash) { 
58        return (String)entityCache.get(hash);
59    }
60
61    /** adds a new entity hash to short name (reverse) mapping */
62    public static void addEntity(String hash, String shortName) {
63        entityCache.put(hash, shortName);
64    }
65
66    /** add the static credentials which make up a credential domain */
67    public void addDomain(CredentialDomain domain) {
68        Iterator creds = convert(domain).iterator();
69        try{
70            while(creds.hasNext()) {
71                StaticCredential cred = (StaticCredential)creds.next();
72                HashSet siblings = (HashSet)indexByDomains.get(domain);
73                //System.out.println("Adding " + cred);
74                addCredential(cred);
75                if(siblings == null) {
76                    siblings = new HashSet(1);
77                    indexByDomains.put(domain, siblings);
78                }
79                siblings.add(cred);
80            }
81            store.addCredentialDomain(domain.getHashID(), domain);
82        } catch(Exception ex) {
83            //ex.printStackTrace();
84        }
85    }
86   
87    /**
88     * removes a the domain for this credential and any othe credentials in
89     * the same domain.
90     */
91    public void removeCredential(RtmlCredential cred) {
92        CredentialDomain domain = cred.getCredentialDomain();
93        HashSet credSet = (HashSet)indexByDomains.get(domain);
94        if(credSet != null) {
95            super.removeCredentials((Collection)credSet);
96        }       
97    }
98
99    /** protected accessor method used for importing a set of cred domains */
100    protected CredentialStore getCredentialStore() {
101        return store;
102    }
103
104    /** importing domains is used publicly for credential discovery */
105    public void importDomains(RtmlEngine engine) {
106        importDomains(engine.getCredentialStore());
107    }
108
109    /** internal method for loading the engine from a credential store */
110    public void importDomains(CredentialStore store) {
111        HashMap domains = store.getCredentialDomains();
112        Iterator i = domains.values().iterator();
113        while(i.hasNext()) {
114            //System.out.println("domain = " + i.next().getClass());
115            addDomain((CredentialDomain)i.next());
116        }
117    }
118   
119
120    /** convert a credential domain into a set of static credentials */
121    public static Collection convert(CredentialDomain domain) {
122        HashSet set = new HashSet();
123        Iterator roles = domain.roleDefinitionIterator();
124        int count = 0;
125        while(roles.hasNext()) {
126            //System.out.println("Role Definition # " + ++count);
127            RoleDefinition def = (RoleDefinition)roles.next();
128            Role head = (Role)
129                RtmlExpression.convert(def.getHead(), domain);
130            EntityExpression body = 
131                RtmlExpression.convert(def.getBody(), domain);
132            StaticCredential cred = new RtmlCredential(head, body, domain);
133            //System.out.println("\tcred = " + cred);
134            set.add(cred);
135        }
136        return set;
137    }
138
139    /** main method for a test application */
140    public static void main(String argv[]) {
141        if(argv.length < 1) {
142            System.out.println("java com.nailabs.abac.credential.RtmlCredential  cred_store.xml");
143            System.exit(1);
144        }
145        try {
146            RTParser parser = new RTParser();
147            //System domain is created here.
148            RTContext context = new RTContext(parser);
149            CredentialStore store = new CredentialStore(parser);
150
151            parser.parseCredentialStore(new FileInputStream(new File(argv[0])),
152                                        context, store);
153            CredentialDomain domain = 
154                store.getCredentialDomain(System.getProperty(
155                  "com.nailabs.abac.credential.Hash", "FakeHashCredential01"));
156            convert(domain);
157        } catch(Exception ex) {
158            ex.printStackTrace();
159        }
160    }
161
162}
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