[418b586] | 1 | package net.deterlab.abac; |
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| 2 | |
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| 3 | import org.apache.commons.collections15.*; |
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| 4 | import org.apache.commons.collections15.functors.*; |
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| 5 | |
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| 6 | import edu.uci.ics.jung.graph.*; |
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| 7 | import edu.uci.ics.jung.graph.event.*; |
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| 8 | import edu.uci.ics.jung.graph.util.*; |
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| 9 | |
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| 10 | import java.awt.geom.Point2D; |
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| 11 | import java.io.*; |
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| 12 | import java.util.*; |
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| 13 | import java.util.zip.*; |
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| 14 | import java.security.*; |
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| 15 | import java.security.cert.*; |
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| 16 | |
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[0595372] | 17 | import org.bouncycastle.asn1.*; |
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| 18 | import org.bouncycastle.asn1.x509.*; |
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[418b586] | 19 | import org.bouncycastle.x509.*; |
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| 20 | import org.bouncycastle.x509.util.*; |
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| 21 | import org.bouncycastle.openssl.*; |
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| 22 | |
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| 23 | /** |
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| 24 | * Represents a global graph of credentials in the form of principals and |
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| 25 | * attributes. |
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| 26 | */ |
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| 27 | public class Context { |
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| 28 | static final int ABAC_CERT_SUCCESS = 0; |
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| 29 | static final int ABAC_CERT_INVALID = -1; |
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| 30 | static final int ABAC_CERT_BAD_SIG = -2; |
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| 31 | static final int ABAC_CERT_MISSING_ISSUER = -3; |
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| 32 | |
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| 33 | protected Graph<Role,Credential> g; |
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| 34 | protected Set<Credential> derived_edges; |
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| 35 | protected Query pq; |
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| 36 | protected boolean dirty; |
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| 37 | protected Set<Identity> identities; |
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| 38 | |
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| 39 | protected Map<String, String> nicknames; |
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| 40 | protected Map<String, String> keys; |
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| 41 | |
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[1a80501] | 42 | public class QueryResult { |
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| 43 | protected Collection<Credential> creds; |
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| 44 | protected boolean success; |
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| 45 | |
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| 46 | public QueryResult(Collection<Credential> c, boolean s) { |
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| 47 | creds = c; |
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| 48 | success = s; |
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| 49 | } |
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| 50 | |
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| 51 | public QueryResult() { |
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| 52 | creds = new TreeSet<Credential>(); |
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| 53 | success = false; |
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| 54 | } |
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| 55 | |
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| 56 | public Collection<Credential> getCredentials() { return creds; } |
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| 57 | public boolean getSuccess() { return success; } |
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| 58 | } |
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| 59 | |
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| 60 | |
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[418b586] | 61 | public Context() { |
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| 62 | /* create the graph */ |
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| 63 | g = Graphs.<Role,Credential>synchronizedDirectedGraph( |
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| 64 | new DirectedSparseGraph<Role,Credential>()); |
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| 65 | derived_edges = new HashSet<Credential>(); |
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| 66 | pq = new Query(g); |
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| 67 | dirty = false; |
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| 68 | identities = new TreeSet<Identity>(); |
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| 69 | nicknames = new TreeMap<String, String>(); |
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| 70 | keys = new TreeMap<String, String>(); |
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| 71 | } |
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| 72 | |
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| 73 | public Context(Context c) { |
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| 74 | this(); |
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| 75 | for (Identity i: c.identities) |
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| 76 | loadIDChunk(i); |
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| 77 | for (Credential cr: c.credentials()) |
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| 78 | loadAttributeChunk(cr); |
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| 79 | derive_implied_edges(); |
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| 80 | } |
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| 81 | |
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[1a80501] | 82 | public int loadIDFile(String fn) { return loadIDChunk(new File(fn)); } |
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| 83 | public int loadIDFile(File fn) { return loadIDChunk(fn); } |
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[418b586] | 84 | public int loadIDChunk(Object c) { |
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| 85 | try { |
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| 86 | if (c instanceof Identity) |
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| 87 | addIdentity((Identity) c); |
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| 88 | else if (c instanceof String) |
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| 89 | addIdentity(new Identity((String) c)); |
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| 90 | else if (c instanceof File) |
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| 91 | addIdentity(new Identity((File) c)); |
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| 92 | else if (c instanceof X509Certificate) |
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| 93 | addIdentity(new Identity((X509Certificate) c)); |
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| 94 | else |
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| 95 | return ABAC_CERT_INVALID; |
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| 96 | } |
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| 97 | catch (SignatureException sig) { |
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| 98 | return ABAC_CERT_BAD_SIG; |
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| 99 | } |
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| 100 | catch (Exception e) { |
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| 101 | return ABAC_CERT_INVALID; |
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| 102 | } |
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| 103 | return ABAC_CERT_SUCCESS; |
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| 104 | } |
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| 105 | |
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| 106 | public int loadAttributeFile(String fn) { |
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[1a80501] | 107 | return loadAttributeChunk(new File(fn)); |
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[418b586] | 108 | } |
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| 109 | |
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[1a80501] | 110 | public int loadAttributeFile(File fn) { return loadAttributeChunk(fn); } |
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[418b586] | 111 | |
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| 112 | public int loadAttributeChunk(Object c) { |
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| 113 | try { |
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| 114 | if (c instanceof Credential) |
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| 115 | add_credential((Credential) c); |
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| 116 | else if (c instanceof String) |
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| 117 | add_credential(new Credential((String) c, identities)); |
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| 118 | else if (c instanceof File) |
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| 119 | add_credential(new Credential((File) c, identities)); |
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| 120 | else if ( c instanceof X509V2AttributeCertificate) |
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| 121 | add_credential(new Credential((X509V2AttributeCertificate)c, |
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| 122 | identities)); |
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| 123 | else |
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| 124 | return ABAC_CERT_INVALID; |
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| 125 | } |
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| 126 | catch (SignatureException sig) { |
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| 127 | return ABAC_CERT_BAD_SIG; |
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| 128 | } |
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| 129 | catch (Exception e) { |
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| 130 | return ABAC_CERT_INVALID; |
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| 131 | } |
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| 132 | return ABAC_CERT_SUCCESS; |
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| 133 | } |
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| 134 | |
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[1a80501] | 135 | public QueryResult query(String role, String principal) { |
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[418b586] | 136 | derive_implied_edges(); |
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| 137 | |
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| 138 | Query q = new Query(g); |
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| 139 | Graph<Role, Credential> rg = q.run(role, principal); |
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[1a80501] | 140 | |
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| 141 | return new QueryResult(rg.getEdges(), q.successful()); |
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[418b586] | 142 | } |
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| 143 | |
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| 144 | /** |
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| 145 | * Returns a collection of the credentials in the graph. |
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| 146 | */ |
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| 147 | public Collection<Credential> credentials() { |
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| 148 | Collection<Credential> creds = new HashSet<Credential>(); |
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| 149 | |
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| 150 | // only return creds with a cert: all others are derived edges |
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| 151 | for (Credential cred : g.getEdges()) |
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| 152 | if (cred.cert() != null) |
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| 153 | creds.add(cred); |
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| 154 | |
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| 155 | return creds; |
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| 156 | } |
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| 157 | |
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[53f5c27] | 158 | public boolean knowsIdentity(Identity i) { return identities.contains(i); } |
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| 159 | public boolean knowsKeyID(String k) { |
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| 160 | boolean known = false; |
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| 161 | for (Identity i: identities) |
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| 162 | if (k.equals(i.getKeyID())) return true; |
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| 163 | return false; |
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[418b586] | 164 | } |
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| 165 | |
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[53f5c27] | 166 | |
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[418b586] | 167 | /** |
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| 168 | * Add a credential to the graph. |
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| 169 | */ |
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| 170 | public void add_credential(Credential cred) { |
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| 171 | Role tail = cred.tail(); |
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| 172 | Role head = cred.head(); |
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| 173 | |
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[f25a7ff] | 174 | // explicitly add the vertices, to avoid a null pointer exception |
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[418b586] | 175 | if ( !g.containsVertex(head)) |
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| 176 | g.addVertex(head); |
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| 177 | if ( !g.containsVertex(tail)) |
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| 178 | g.addVertex(tail); |
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| 179 | |
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| 180 | if (!g.containsEdge(cred)) |
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| 181 | g.addEdge(cred, tail, head); |
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| 182 | |
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| 183 | // add the prereqs of an intersection to the graph |
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| 184 | if (tail.is_intersection()) |
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| 185 | for (Role prereq : tail.prereqs()) |
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| 186 | g.addVertex(prereq); |
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| 187 | |
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| 188 | dirty = true; |
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| 189 | } |
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| 190 | |
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| 191 | /** |
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| 192 | * Remove a credential from the graph. |
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| 193 | */ |
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| 194 | public void remove_credential(Credential cred) { |
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| 195 | if (g.containsEdge(cred)) |
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| 196 | g.removeEdge(cred); |
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| 197 | dirty = true; |
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| 198 | } |
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| 199 | |
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| 200 | /** |
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| 201 | * Add a role w/o an edge |
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| 202 | */ |
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| 203 | public void add_vertex(Role v) { |
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| 204 | if (!g.containsVertex(v)) { |
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| 205 | g.addVertex(v); |
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| 206 | dirty = true; |
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| 207 | } |
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| 208 | } |
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| 209 | |
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| 210 | public void remove_vertex(Role v) { |
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| 211 | if (g.containsVertex(v)) { |
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| 212 | g.removeVertex(v); |
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| 213 | dirty = true; |
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| 214 | } |
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| 215 | } |
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| 216 | public Collection<Role> roles() { |
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| 217 | return g.getVertices(); |
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| 218 | } |
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| 219 | |
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| 220 | /** |
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| 221 | * Derive the implied edges in the graph, according to RT0 derivation rules. |
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| 222 | * They are added to this graph. See "Distributed Credential Chain Discovery |
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| 223 | * in Trust Management" by Ninghui Li et al. for details. Note that a |
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| 224 | * derived linking edge can imply a new intersection edge and vice versa. |
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| 225 | * Therefore we iteratively derive edges, giving up when an iteration |
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| 226 | * produces 0 new edges. |
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| 227 | */ |
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| 228 | protected synchronized void derive_implied_edges() { |
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| 229 | // nothing to do on a clean graph |
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| 230 | if (!dirty) |
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| 231 | return; |
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| 232 | |
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| 233 | clear_old_edges(); |
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| 234 | |
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| 235 | // iteratively derive links. continue as long as new links are added |
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| 236 | while (derive_links_iter() > 0) |
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| 237 | ; |
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| 238 | dirty = false; |
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| 239 | } |
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| 240 | |
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| 241 | /** |
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| 242 | * Single iteration of deriving implied edges. Returns the number of new |
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| 243 | * links added. |
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| 244 | */ |
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| 245 | protected int derive_links_iter() { |
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| 246 | int count = 0; |
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| 247 | |
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| 248 | /* for every node in the graph.. */ |
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| 249 | for (Role vertex : g.getVertices()) { |
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| 250 | if (vertex.is_intersection()) { |
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| 251 | // for each prereq edge: |
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| 252 | // find set of principals that have the prereq |
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[f25a7ff] | 253 | // find the intersection of all sets (i.e., principals |
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| 254 | // that satisfy all prereqs) |
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[418b586] | 255 | // for each principal in intersection: |
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| 256 | // add derived edge |
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| 257 | |
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| 258 | Set<Role> principals = null; |
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| 259 | |
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| 260 | for (Role prereq : vertex.prereqs()) { |
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| 261 | Set<Role> cur_principals = pq.find_principals(prereq); |
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| 262 | |
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| 263 | if (principals == null) |
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| 264 | principals = cur_principals; |
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| 265 | else |
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| 266 | // no, they couldn't just call it "intersection" |
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| 267 | principals.retainAll(cur_principals); |
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| 268 | |
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| 269 | if (principals.size() == 0) |
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| 270 | break; |
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| 271 | } |
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| 272 | |
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| 273 | // add em |
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| 274 | for (Role principal : principals) |
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| 275 | if (add_derived_edge(vertex, principal)) |
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| 276 | ++count; |
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| 277 | } |
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| 278 | |
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| 279 | else if (vertex.is_linking()) { |
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| 280 | // make the rest of the code a bit clearer |
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| 281 | Role A_r1_r2 = vertex; |
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| 282 | |
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| 283 | Role A_r1 = new Role(A_r1_r2.A_r1()); |
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| 284 | String r2 = A_r1_r2.r2(); |
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| 285 | |
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| 286 | /* locate the node A.r1 */ |
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[f25a7ff] | 287 | if (!g.containsVertex(A_r1)) continue; |
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[418b586] | 288 | |
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| 289 | /* for each B that satisfies A_r1 */ |
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| 290 | for (Role principal : pq.find_principals(A_r1)) { |
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| 291 | Role B_r2 = new Role(principal + "." + r2); |
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| 292 | if (!g.containsVertex(B_r2)) continue; |
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| 293 | |
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| 294 | if (add_derived_edge(A_r1_r2, B_r2)) |
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| 295 | ++count; |
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| 296 | } |
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| 297 | } |
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| 298 | } |
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| 299 | |
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| 300 | return count; |
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| 301 | } |
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| 302 | |
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| 303 | /** |
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| 304 | * Add a derived edge in the graph. Returns true only if the edge does not |
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| 305 | * exist. |
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| 306 | */ |
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| 307 | protected boolean add_derived_edge(Role head, Role tail) { |
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| 308 | // edge exists: return false |
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| 309 | if (g.findEdge(tail, head) != null) |
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| 310 | return false; |
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| 311 | |
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| 312 | // add the new edge |
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| 313 | Credential derived_edge = new Credential(head, tail); |
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| 314 | derived_edges.add(derived_edge); |
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| 315 | g.addEdge(derived_edge, tail, head); |
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| 316 | |
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| 317 | return true; |
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| 318 | } |
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| 319 | |
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| 320 | /** |
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| 321 | * Clear the derived edges that currently exist in the graph. This is done |
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| 322 | * before the edges are rederived. The derived edges in filtered graphs are |
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| 323 | * also cleared. |
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| 324 | */ |
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| 325 | protected void clear_old_edges() { |
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| 326 | for (Credential i: derived_edges) |
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| 327 | g.removeEdge(i); |
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| 328 | derived_edges = new HashSet<Credential>(); |
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| 329 | } |
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| 330 | /** |
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| 331 | * Put the Identity into the set of ids used to validate certificates. |
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| 332 | * Also put the keyID and name into the translation mappings used by Roles |
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| 333 | * to pretty print. In the role mapping, if multiple ids use the same |
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| 334 | * common name they are disambiguated. Only one entry for keyid is |
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| 335 | * allowed. |
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| 336 | */ |
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| 337 | protected void addIdentity(Identity id) { |
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| 338 | identities.add(id); |
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| 339 | if (id.getName() != null && id.getKeyID() != null) { |
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| 340 | if ( !keys.containsKey(id.getKeyID()) ) { |
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| 341 | String name = id.getName(); |
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| 342 | int n= 1; |
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| 343 | |
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| 344 | while (nicknames.containsKey(name)) { |
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| 345 | name = id.getName() + n++; |
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| 346 | } |
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| 347 | nicknames.put(name, id.getKeyID()); |
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| 348 | keys.put(id.getKeyID(), name); |
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| 349 | } |
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| 350 | } |
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| 351 | } |
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| 352 | /** |
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| 353 | * Translate either keys to nicknames or vice versa. Break the string into |
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| 354 | * space separated tokens and then each of them into period separated |
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| 355 | * strings. If any of the smallest strings is in the map, replace it with |
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| 356 | * the value. |
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| 357 | */ |
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| 358 | protected String replace(String is, Map<String, String> m) { |
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| 359 | String rv = ""; |
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| 360 | for (String tok: is.split(" ")) { |
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| 361 | String term = ""; |
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| 362 | for (String s: tok.split("\\.")) { |
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| 363 | String next = m.containsKey(s) ? m.get(s) : s; |
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| 364 | |
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| 365 | if (term.isEmpty()) term = next; |
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| 366 | else term += "." + next; |
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| 367 | } |
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| 368 | if (rv.isEmpty()) rv = term; |
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| 369 | else rv += " " + term; |
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| 370 | } |
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| 371 | return rv; |
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| 372 | } |
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| 373 | |
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| 374 | public String expandKeyID(String s) { return replace(s, nicknames); } |
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| 375 | public String expandNickname(String s) { return replace(s, keys); } |
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| 376 | |
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| 377 | /** |
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| 378 | * Import a zip file. First import all the identities |
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| 379 | * (pem), then the credentials (der) into the credential graph then any |
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| 380 | * alias files into the two maps. If keys is not null, any key pairs in |
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| 381 | * PEM files are put in there. If errors is not null, errors reading files |
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| 382 | * are added indexed by filename. |
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| 383 | */ |
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| 384 | public void readZipFile(File zf, Collection<KeyPair> keys, |
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| 385 | Map<String, Exception> errors) throws IOException { |
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| 386 | Vector<ZipEntry> derEntries = new Vector<ZipEntry>(); |
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| 387 | Map<String, Identity> ids = new TreeMap<String, Identity>(); |
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| 388 | Map<String, KeyPair> kps = new TreeMap<String, KeyPair>(); |
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| 389 | |
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| 390 | ZipFile z = new ZipFile(zf); |
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| 391 | |
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| 392 | for (Enumeration<? extends ZipEntry> ze = z.entries(); |
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| 393 | ze.hasMoreElements();) { |
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| 394 | ZipEntry f = ze.nextElement(); |
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| 395 | try { |
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| 396 | PEMReader r = new PEMReader( |
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| 397 | new InputStreamReader(z.getInputStream(f))); |
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| 398 | Object o = readPEM(r); |
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| 399 | |
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| 400 | if ( o != null ) { |
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| 401 | if (o instanceof Identity) { |
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| 402 | Identity i = (Identity) o; |
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| 403 | String kid = i.getKeyID(); |
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| 404 | |
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| 405 | if (kps.containsKey(kid) ) { |
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| 406 | i.setKeyPair(kps.get(kid)); |
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| 407 | kps.remove(kid); |
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| 408 | } |
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| 409 | else if (i.getKeyPair() == null ) |
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| 410 | ids.put(i.getKeyID(), i); |
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| 411 | |
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| 412 | loadIDChunk(i); |
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| 413 | } |
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| 414 | else if (o instanceof KeyPair ) { |
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| 415 | KeyPair kp = (KeyPair) o; |
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[0595372] | 416 | String kid = extractKeyID(kp.getPublic()); |
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[418b586] | 417 | |
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| 418 | if (ids.containsKey(kid)) { |
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| 419 | Identity i = ids.get(kid); |
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| 420 | |
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| 421 | i.setKeyPair(kp); |
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| 422 | ids.remove(kid); |
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| 423 | } |
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| 424 | else { |
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| 425 | kps.put(kid, kp); |
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| 426 | } |
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| 427 | } |
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| 428 | } |
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| 429 | else { |
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| 430 | // Not a PEM file |
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| 431 | derEntries.add(f); |
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| 432 | continue; |
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| 433 | } |
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| 434 | } |
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| 435 | catch (Exception e ) { |
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| 436 | if (errors != null ) errors.put(f.getName(), e); |
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| 437 | } |
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| 438 | } |
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| 439 | |
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| 440 | for ( ZipEntry f : derEntries ) { |
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| 441 | try { |
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| 442 | add_credential(new Credential(z.getInputStream(f), identities)); |
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| 443 | } |
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| 444 | catch (Exception e ) { |
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| 445 | if (errors != null ) errors.put(f.getName(), e); |
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| 446 | } |
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| 447 | } |
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| 448 | } |
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| 449 | |
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| 450 | public void readZipFile(File d) |
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| 451 | throws IOException { |
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| 452 | readZipFile(d, null, null); |
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| 453 | } |
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| 454 | public void readZipFile(File d, |
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| 455 | Map<String, Exception> errors) throws IOException { |
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| 456 | readZipFile(d, null, errors); |
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| 457 | } |
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| 458 | public void readZipFile(File d, |
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| 459 | Collection<KeyPair> keys) throws IOException { |
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| 460 | readZipFile(d, keys, null); |
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| 461 | } |
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| 462 | |
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| 463 | protected Object readPEM(PEMReader r) throws IOException { |
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| 464 | Identity i = null; |
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| 465 | KeyPair keys = null; |
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| 466 | Object o = null; |
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| 467 | |
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| 468 | while ( (o = r.readObject()) != null ) { |
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| 469 | if (o instanceof X509Certificate) { |
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| 470 | if ( i == null ) { |
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| 471 | try { |
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| 472 | i = new Identity((X509Certificate)o); |
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| 473 | } |
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| 474 | catch (Exception e) { |
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| 475 | // Translate Idenitiy exceptions to IOException |
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| 476 | throw new IOException(e); |
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| 477 | } |
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| 478 | if (keys != null ) { |
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| 479 | i.setKeyPair(keys); |
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| 480 | keys = null; |
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| 481 | } |
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| 482 | } |
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| 483 | else throw new IOException("Two certificates"); |
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| 484 | } |
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| 485 | else if (o instanceof KeyPair ) { |
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| 486 | if ( i != null ) i.setKeyPair((KeyPair) o); |
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| 487 | else keys = (KeyPair) o; |
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| 488 | } |
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| 489 | else { |
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| 490 | throw new IOException("Unexpected PEM object: " + |
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| 491 | o.getClass().getName()); |
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| 492 | } |
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| 493 | } |
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| 494 | |
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| 495 | if ( i != null ) return i; |
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| 496 | else if ( keys != null) return keys; |
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| 497 | else return null; |
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| 498 | } |
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| 499 | |
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| 500 | /** |
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| 501 | * Import a directory full of files. First import all the identities |
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| 502 | * (pem), then the credentials (der) into the credential graph then any |
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| 503 | * alias files into the two maps. If keys is not null, any key pairs in |
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| 504 | * PEM files are put in there. If errors is not null, errors reading files |
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| 505 | * are added indexed by filename. |
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| 506 | */ |
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| 507 | public void readDirectory(File d, Collection<KeyPair> keys, |
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| 508 | Map<String, Exception> errors) { |
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| 509 | Vector<File> derFiles = new Vector<File>(); |
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| 510 | Collection<File> files = new Vector<File>(); |
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| 511 | Map<String, Identity> ids = new TreeMap<String, Identity>(); |
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| 512 | Map<String, KeyPair> kps = new TreeMap<String, KeyPair>(); |
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| 513 | |
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| 514 | if (d.isDirectory() ) |
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| 515 | for (File f : d.listFiles()) |
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| 516 | files.add(f); |
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| 517 | else files.add(d); |
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| 518 | |
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| 519 | for (File f: files ) { |
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| 520 | try { |
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| 521 | PEMReader r = new PEMReader(new FileReader(f)); |
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| 522 | Object o = readPEM(r); |
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| 523 | |
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| 524 | if ( o != null ) { |
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| 525 | if (o instanceof Identity) { |
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| 526 | Identity i = (Identity) o; |
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| 527 | String kid = i.getKeyID(); |
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| 528 | |
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| 529 | if (kps.containsKey(kid) ) { |
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| 530 | i.setKeyPair(kps.get(kid)); |
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| 531 | kps.remove(kid); |
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| 532 | } |
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| 533 | else if (i.getKeyPair() == null ) |
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| 534 | ids.put(i.getKeyID(), i); |
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| 535 | |
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| 536 | loadIDChunk(i); |
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| 537 | } |
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| 538 | else if (o instanceof KeyPair ) { |
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| 539 | KeyPair kp = (KeyPair) o; |
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[0595372] | 540 | String kid = extractKeyID(kp.getPublic()); |
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[418b586] | 541 | |
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| 542 | if (ids.containsKey(kid)) { |
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| 543 | Identity i = ids.get(kid); |
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| 544 | |
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| 545 | i.setKeyPair(kp); |
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| 546 | ids.remove(kid); |
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| 547 | } |
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| 548 | else { |
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| 549 | kps.put(kid, kp); |
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| 550 | } |
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| 551 | } |
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| 552 | } |
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| 553 | else { |
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| 554 | // Not a PEM file |
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| 555 | derFiles.add(f); |
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| 556 | continue; |
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| 557 | } |
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| 558 | } |
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| 559 | catch (Exception e ) { |
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| 560 | if (errors != null ) errors.put(f.getName(), e); |
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| 561 | } |
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| 562 | } |
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| 563 | |
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| 564 | for ( File f : derFiles ) { |
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| 565 | try { |
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| 566 | add_credential(new Credential(f, identities)); |
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| 567 | } |
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| 568 | catch (Exception e ) { |
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| 569 | if (errors != null ) errors.put(f.getName(), e); |
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| 570 | } |
---|
| 571 | } |
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| 572 | } |
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| 573 | |
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| 574 | public void readDirectory(File d) { |
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| 575 | readDirectory(d, null, null); |
---|
| 576 | } |
---|
| 577 | public void readDirectory(File d, Map<String, Exception> errors) { |
---|
| 578 | readDirectory(d, null, errors); |
---|
| 579 | } |
---|
| 580 | public void readDirectory(File d, Collection<KeyPair> keys) { |
---|
| 581 | readDirectory(d, keys, null); |
---|
| 582 | } |
---|
| 583 | |
---|
| 584 | public void writeZipFile(File f, boolean allIDs, boolean withPrivateKeys) |
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| 585 | throws IOException { |
---|
| 586 | ZipOutputStream z = new ZipOutputStream(new FileOutputStream(f)); |
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| 587 | Set<Identity> ids = allIDs ? identities : new TreeSet<Identity>(); |
---|
| 588 | |
---|
| 589 | int n = 0; |
---|
| 590 | for (Credential c: credentials()) { |
---|
| 591 | z.putNextEntry(new ZipEntry("attr" + n++ + ".der")); |
---|
| 592 | c.write(z); |
---|
| 593 | z.closeEntry(); |
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[d69593c] | 594 | if ( c.issuer() != null && !allIDs) ids.add(c.issuer()); |
---|
[418b586] | 595 | } |
---|
| 596 | for (Identity i: ids) { |
---|
| 597 | z.putNextEntry(new ZipEntry(i.getName() + ".pem")); |
---|
| 598 | i.write(z); |
---|
| 599 | if (withPrivateKeys) |
---|
| 600 | i.writePrivateKey(z); |
---|
| 601 | z.closeEntry(); |
---|
| 602 | } |
---|
| 603 | z.close(); |
---|
| 604 | } |
---|
| 605 | |
---|
[0595372] | 606 | /** |
---|
| 607 | * Get to the SHA1 hash of the key. |
---|
| 608 | */ |
---|
| 609 | public static String extractKeyID(PublicKey k) { |
---|
| 610 | SubjectPublicKeyInfo ki = extractSubjectPublicKeyInfo(k); |
---|
| 611 | SubjectKeyIdentifier id = |
---|
| 612 | SubjectKeyIdentifier.createSHA1KeyIdentifier(ki); |
---|
| 613 | |
---|
| 614 | // Now format it into a string for keeps |
---|
| 615 | Formatter fmt = new Formatter(new StringWriter()); |
---|
| 616 | for (byte b: id.getKeyIdentifier()) |
---|
| 617 | fmt.format("%02x", b); |
---|
| 618 | return fmt.out().toString(); |
---|
| 619 | } |
---|
| 620 | |
---|
| 621 | /** |
---|
| 622 | * Extratct the SubjectPublicKeyInfo. Useful for some other encryptions, |
---|
| 623 | * notably Certificate.make_cert(). |
---|
| 624 | */ |
---|
| 625 | public static SubjectPublicKeyInfo extractSubjectPublicKeyInfo( |
---|
| 626 | PublicKey k) { |
---|
| 627 | ASN1Sequence seq = null; |
---|
| 628 | try { |
---|
| 629 | seq = (ASN1Sequence) new ASN1InputStream( |
---|
| 630 | k.getEncoded()).readObject(); |
---|
| 631 | } |
---|
| 632 | catch (IOException ie) { |
---|
| 633 | // Badly formatted key?? |
---|
| 634 | return null; |
---|
| 635 | } |
---|
| 636 | return new SubjectPublicKeyInfo(seq); |
---|
| 637 | } |
---|
| 638 | |
---|
| 639 | |
---|
[418b586] | 640 | } |
---|