MMERUnit | Line # 59 | 25 | 6 | 73.8% |
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1 | /* | |
2 | * Copyright (c) 2006, University of Kent | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions are met: | |
7 | * | |
8 | * Redistributions of source code must retain the above copyright notice, this | |
9 | * list of conditions and the following disclaimer. | |
10 | * | |
11 | * Redistributions in binary form must reproduce the above copyright notice, | |
12 | * this list of conditions and the following disclaimer in the documentation | |
13 | * and/or other materials provided with the distribution. | |
14 | * | |
15 | * 1. Neither the name of the University of Kent nor the names of its | |
16 | * contributors may be used to endorse or promote products derived from this | |
17 | * software without specific prior written permission. | |
18 | * | |
19 | * 2. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
22 | * PURPOSE ARE DISCLAIMED. | |
23 | * | |
24 | * 3. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
25 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
31 | * POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | * 4. YOU AGREE THAT THE EXCLUSIONS IN PARAGRAPHS 2 AND 3 ABOVE ARE REASONABLE | |
34 | * IN THE CIRCUMSTANCES. IN PARTICULAR, YOU ACKNOWLEDGE (1) THAT THIS | |
35 | * SOFTWARE HAS BEEN MADE AVAILABLE TO YOU FREE OF CHARGE, (2) THAT THIS | |
36 | * SOFTWARE IS NOT "PRODUCT" QUALITY, BUT HAS BEEN PRODUCED BY A RESEARCH | |
37 | * GROUP WHO DESIRE TO MAKE THIS SOFTWARE FREELY AVAILABLE TO PEOPLE WHO WISH | |
38 | * TO USE IT, AND (3) THAT BECAUSE THIS SOFTWARE IS NOT OF "PRODUCT" QUALITY | |
39 | * IT IS INEVITABLE THAT THERE WILL BE BUGS AND ERRORS, AND POSSIBLY MORE | |
40 | * SERIOUS FAULTS, IN THIS SOFTWARE. | |
41 | * | |
42 | * 5. This license is governed, except to the extent that local laws | |
43 | * necessarily apply, by the laws of England and Wales. | |
44 | */ | |
45 | package issrg.pba.rbac.policies; | |
46 | ||
47 | import issrg.pba.rbac.*; | |
48 | import java.util.Map; | |
49 | import java.util.Hashtable; | |
50 | import java.util.Vector; | |
51 | ||
52 | ||
53 | /** | |
54 | * This is the class representing a MMER unit. A MMER policy may contains several MMER units. | |
55 | * | |
56 | * @author W. Xu | |
57 | * @version 0.1 | |
58 | */ | |
59 | public class MMERUnit { | |
60 | ||
61 | /** | |
62 | * This constructor creates the MMERUnit object. | |
63 | * | |
64 | * @params forbiddenCardinality is the forbidden cardinality of this MMER unit. | |
65 | * @params mmer is a vector of MMER i.e. RoleBasedCredentials, mutually exclusive roles. | |
66 | * | |
67 | */ | |
68 | 28 | public MMERUnit(int forbiddenCardinality, java.util.Vector mmer) { |
69 | 28 | this.forbiddenCardinality = forbiddenCardinality; |
70 | 28 | this.mmer = mmer; |
71 | } | |
72 | ||
73 | public int forbiddenCardinality; | |
74 | int matchCount = 0; | |
75 | java.util.Vector mmer; // this is a vector of RoleBasedCredentials, mutually exclusive roles | |
76 | java.util.Vector mmerBackup; // this is a clone of the above mmer | |
77 | ||
78 | /** | |
79 | * This method returns the current match count of MMER, | |
80 | * i.e. how many MMER have been matched by the user roles in this MMER Unit. | |
81 | */ | |
82 | 26 | public int getMatchCount(){ |
83 | 26 | return matchCount; |
84 | } | |
85 | ||
86 | /** | |
87 | * This method starts a new matching between user roles and this MMER unit. | |
88 | */ | |
89 | 32 | public void startMatch(){ |
90 | 32 | mmerBackup = (java.util.Vector) mmer.clone(); |
91 | 32 | matchCount = 0; |
92 | } | |
93 | ||
94 | /** | |
95 | * This method compare mmer with the input vector V -- an array of user roles, | |
96 | * to determine if any of user roles match mmer roles. Once matched, remove the user role | |
97 | * from the mmer role set. Once the matched number reaches forbinddenCardinality, then | |
98 | * return true. | |
99 | ||
100 | * return true if the input user roles vector matches any of the MMER roles in this MMER unit AND the forbeddenCardinality | |
101 | * is reached; otherwise return false. | |
102 | */ | |
103 | 40 | public boolean MMERMatches(Vector V){ |
104 | 0 | if (V==null) return false; |
105 | ||
106 | 109 | loop: for (int i = mmerBackup.size()-1; i>=0 ; --i ) { |
107 | 77 | RoleBasedCredentials r = (RoleBasedCredentials) mmerBackup.get(i); |
108 | 113 | for (int j = V.size()-1; j>= 0 ; --j ) { |
109 | 71 | issrg.pba.Credentials pc = |
110 | ((ExpirableCredentials)(V.get(j))).getExpirable(); | |
111 | 71 | if(r.contains(pc)) { |
112 | //they are equal, so ignore it from mmer | |
113 | 35 | mmerBackup.remove(i); |
114 | 35 | V.remove(j); |
115 | 35 | ++ matchCount; |
116 | 35 | if (matchCount >= forbiddenCardinality) { |
117 | //System.out.println("mmer rule broken " ); | |
118 | 8 | return true; |
119 | } | |
120 | 27 | continue loop; |
121 | } | |
122 | } | |
123 | } | |
124 | ||
125 | 32 | return false; |
126 | } | |
127 | ||
128 | /** | |
129 | * This method is to output all the role information in the MMER unit as a String. This is for testing purposes. | |
130 | */ | |
131 | 0 | public String toString(){ |
132 | // testing code here | |
133 | 0 | int size = mmer.size(); |
134 | 0 | StringBuffer result = new StringBuffer(); |
135 | 0 | for (int i = 0; i< size ; i++ ) { |
136 | 0 | RoleBasedCredentials tr = (RoleBasedCredentials ) mmer.get(i); |
137 | 0 | result.append( tr.getRoleType() + tr.getRoleValue() ); |
138 | } | |
139 | ||
140 | 0 | return result.toString(); |
141 | } | |
142 | ||
143 | } | |
144 |
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