[31b67d5] | 1 | package net.deterlab.abac; |
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| 2 | |
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[7ef13e3] | 3 | import java.io.*; |
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[281158a] | 4 | import java.math.*; |
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[7ef13e3] | 5 | |
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| 6 | import java.util.*; |
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[5cf72cc] | 7 | import java.util.zip.*; |
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[7ef13e3] | 8 | import java.security.*; |
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| 9 | import java.security.cert.*; |
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| 10 | |
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[9725efb] | 11 | import net.deterlab.abac.Identity; |
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[90f939f] | 12 | |
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| 13 | import org.bouncycastle.asn1.*; |
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[e9360e2] | 14 | import org.bouncycastle.asn1.x509.*; |
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[90f939f] | 15 | import org.bouncycastle.x509.*; |
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[281158a] | 16 | import org.bouncycastle.jce.X509Principal; |
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[90f939f] | 17 | import org.bouncycastle.jce.provider.X509AttrCertParser; |
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[7ef13e3] | 18 | import org.bouncycastle.jce.provider.X509CertificateObject; |
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| 19 | import org.bouncycastle.openssl.PEMReader; |
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[90f939f] | 20 | |
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[281158a] | 21 | import java.security.PrivateKey; |
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| 22 | |
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[88e139a] | 23 | public class Credential implements Comparable { |
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[9725efb] | 24 | protected static Vector<Identity> s_ids = new Vector<Identity>(); |
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[281158a] | 25 | protected static String attrOID = "1.3.6.1.5.5.7.10.4"; |
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[e9360e2] | 26 | protected static String authKeyOID = "2.5.29.35"; |
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[9394f1f] | 27 | |
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| 28 | /** |
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| 29 | * A dummy credential. |
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| 30 | */ |
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| 31 | public Credential() { |
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| 32 | m_head = m_tail = null; |
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| 33 | m_ac = null; |
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| 34 | m_id = null; |
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| 35 | } |
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[31b67d5] | 36 | /** |
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| 37 | * Create a credential from a head and tail role. This is only for testing. |
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| 38 | * In a real implementation the Credential must be loaded from an X.509 |
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| 39 | * attribute cert. |
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| 40 | */ |
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| 41 | public Credential(Role head, Role tail) { |
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| 42 | m_head = head; |
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| 43 | m_tail = tail; |
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[9394f1f] | 44 | m_ac = null; |
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| 45 | m_id = null; |
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[31b67d5] | 46 | } |
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| 47 | |
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[90f939f] | 48 | /** |
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[7ef13e3] | 49 | * Do the credential initialization from a filename. |
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[90f939f] | 50 | */ |
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[1a7e6d3] | 51 | protected void init(InputStream stream) throws Exception { |
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[90f939f] | 52 | X509AttrCertParser parser = new X509AttrCertParser(); |
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[1a7e6d3] | 53 | parser.engineInit(stream); |
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[90f939f] | 54 | m_ac = (X509V2AttributeCertificate)parser.engineRead(); |
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[7ef13e3] | 55 | m_id = null; |
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| 56 | |
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[be05757] | 57 | if ( m_ac == null ) throw new IOException("Invalid Credential Format"); |
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| 58 | |
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[9725efb] | 59 | for (Identity id: s_ids) { |
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[7ef13e3] | 60 | try { |
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[9725efb] | 61 | m_ac.verify(id.getCertificate().getPublicKey(), "BC"); |
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[7ef13e3] | 62 | m_id = id; |
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| 63 | break; |
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| 64 | } |
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[9725efb] | 65 | catch (InvalidKeyException e) { } |
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[7ef13e3] | 66 | } |
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| 67 | if (m_id == null) throw new InvalidKeyException("Unknown identity"); |
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[90f939f] | 68 | |
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| 69 | load_roles(); |
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[281158a] | 70 | |
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| 71 | if (!m_id.getKeyID().equals(m_head.issuer_part())) |
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| 72 | throw new InvalidKeyException("Unknown identity"); |
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[90f939f] | 73 | } |
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| 74 | |
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[7ef13e3] | 75 | /** |
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| 76 | * Create a credential from an attribute cert. Throws an exception if the |
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| 77 | * cert file can't be opened or if there's a format problem with the cert. |
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| 78 | */ |
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| 79 | public Credential(String filename) throws Exception { |
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[1a7e6d3] | 80 | init(new FileInputStream(filename)); |
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[7ef13e3] | 81 | } |
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| 82 | |
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| 83 | /** |
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| 84 | * Create a credential from an attribute cert. Throws an exception if the |
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| 85 | * cert file can't be opened or if there's a format problem with the cert. |
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| 86 | */ |
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| 87 | public Credential(File file) throws Exception { |
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[1a7e6d3] | 88 | init(new FileInputStream(file)); |
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| 89 | } |
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| 90 | |
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| 91 | /** |
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| 92 | * Create a credential from an InputStream. |
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| 93 | */ |
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| 94 | public Credential(InputStream s) throws Exception { |
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| 95 | init(s); |
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[7ef13e3] | 96 | } |
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| 97 | |
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[e9360e2] | 98 | /** |
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| 99 | * Create a certificate from this credential issued by the given identity. |
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| 100 | * This is just grungy credential generation work. |
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| 101 | */ |
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| 102 | public void make_cert(Identity i) { |
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| 103 | PrivateKey key = i.getKeyPair().getPrivate(); |
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| 104 | SubjectPublicKeyInfo pki = Identity.extractSubjectPublicKeyInfo( |
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| 105 | i.getKeyPair().getPublic()); |
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[281158a] | 106 | X509V2AttributeCertificateGenerator gen = |
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| 107 | new X509V2AttributeCertificateGenerator(); |
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| 108 | |
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| 109 | gen.setIssuer(new AttributeCertificateIssuer( |
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| 110 | new X509Principal("CN="+m_head.issuer_part()))); |
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| 111 | gen.setHolder(new AttributeCertificateHolder( |
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| 112 | new X509Principal("CN="+m_head.issuer_part()))); |
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| 113 | gen.setNotAfter(new Date(System.currentTimeMillis() |
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| 114 | + 3600 * 1000 * 24 * 365)); |
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| 115 | gen.setNotBefore(new Date(System.currentTimeMillis())); |
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| 116 | gen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis())); |
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| 117 | gen.addAttribute(new X509Attribute(attrOID, |
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| 118 | new DERSequence( |
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| 119 | new DERSequence( |
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| 120 | new DERUTF8String(toString()))))); |
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| 121 | gen.setSignatureAlgorithm("SHA256WithRSAEncryption"); |
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| 122 | |
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| 123 | try { |
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[e9360e2] | 124 | // Creddy expects an authority key identifier. |
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| 125 | gen.addExtension(authKeyOID, false, |
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| 126 | new AuthorityKeyIdentifier(pki)); |
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| 127 | // Create the cert. |
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[281158a] | 128 | m_ac = (X509V2AttributeCertificate) gen.generate(key, "BC"); |
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| 129 | } |
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| 130 | catch (Exception e) { |
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| 131 | System.err.println(e); |
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| 132 | } |
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| 133 | } |
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[7ef13e3] | 134 | |
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[90f939f] | 135 | /** |
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| 136 | * Load the roles off the attribute cert. Throws a RuntimeException if |
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| 137 | * there's something wrong with the cert. |
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| 138 | */ |
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| 139 | private void load_roles() throws RuntimeException { |
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| 140 | String roles = null; |
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| 141 | try { |
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| 142 | X509Attribute attr = m_ac.getAttributes()[0]; |
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| 143 | |
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| 144 | DERSequence java = (DERSequence)attr.getValues()[0]; |
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| 145 | DERSequence fucking = (DERSequence)java.getObjectAt(0); |
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| 146 | DERUTF8String sucks = (DERUTF8String)fucking.getObjectAt(0); |
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| 147 | |
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| 148 | roles = sucks.getString(); |
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| 149 | } |
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| 150 | catch (Exception e) { |
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| 151 | throw new RuntimeException("Your attribute certificate is funky and I'm not gonna debug it", e); |
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| 152 | } |
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| 153 | |
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| 154 | String[] parts = roles.split("\\s*<--?\\s*"); |
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| 155 | if (parts.length != 2) |
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| 156 | throw new RuntimeException("Invalid attribute: " + roles); |
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| 157 | |
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| 158 | m_head = new Role(parts[0]); |
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| 159 | m_tail = new Role(parts[1]); |
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| 160 | } |
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| 161 | |
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[cfcdcb4b] | 162 | /** |
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| 163 | * Two credentials are the same if their roles are the same. |
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| 164 | */ |
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| 165 | public boolean equals(Object o) { |
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| 166 | if ( o instanceof Credential ) { |
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| 167 | Credential c = (Credential) o; |
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| 168 | |
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| 169 | if (m_head == null || m_tail == null ) return false; |
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| 170 | else return (m_head.equals(c.head()) && m_tail.equals(c.tail())); |
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| 171 | } |
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| 172 | else return false; |
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| 173 | } |
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| 174 | |
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[88e139a] | 175 | public int compareTo(Object o) { |
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| 176 | if (o instanceof Credential) { |
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| 177 | Credential c = (Credential) o; |
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| 178 | |
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| 179 | if (head().equals(c.head())) return tail().compareTo(c.tail()); |
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| 180 | else return head().compareTo(c.head()); |
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| 181 | } |
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| 182 | else return 1; |
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| 183 | } |
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| 184 | |
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| 185 | |
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[31b67d5] | 186 | /** |
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| 187 | * Get the head role from the credential. |
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| 188 | */ |
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| 189 | public Role head() { |
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| 190 | return m_head; |
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| 191 | } |
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| 192 | |
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| 193 | /** |
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| 194 | * Get the tail role from the credential |
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| 195 | */ |
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| 196 | public Role tail() { |
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| 197 | return m_tail; |
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| 198 | } |
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| 199 | |
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[90f939f] | 200 | /** |
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| 201 | * Gets the cert associated with this credential (if any). |
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| 202 | */ |
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| 203 | public X509V2AttributeCertificate cert() { |
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| 204 | return m_ac; |
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| 205 | } |
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| 206 | |
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[31b67d5] | 207 | /** |
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| 208 | * Turn the credential into string form. The format is head <- tail. For |
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| 209 | * example: A.r1 <- B.r2.r3. |
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| 210 | */ |
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| 211 | public String toString() { |
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| 212 | return m_head + " <- " + m_tail; |
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| 213 | } |
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| 214 | |
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[de63a31] | 215 | public String simpleString() { |
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| 216 | return m_head.simpleString() + " <- " + m_tail.simpleString(); |
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| 217 | } |
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| 218 | |
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[1a7e6d3] | 219 | public void write(OutputStream s) throws IOException { |
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| 220 | s.write(m_ac.getEncoded()); |
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[e9360e2] | 221 | s.flush(); |
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[1a7e6d3] | 222 | } |
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| 223 | |
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| 224 | public void write(String fn) throws IOException, FileNotFoundException { |
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| 225 | write(new FileOutputStream(fn)); |
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| 226 | } |
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| 227 | |
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[f6789db] | 228 | public boolean hasCertificate() { return m_ac != null; } |
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| 229 | |
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[5cf72cc] | 230 | public Identity getID() { return m_id; } |
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| 231 | |
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| 232 | /** |
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| 233 | * Import a zip file. First import all the identities |
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| 234 | * (pem), then the credentials (der) into the credential graph then any |
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| 235 | * alias files into the two maps. If keys is not null, any key pairs in |
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| 236 | * PEM files are put in there. If errors is not null, errors reading files |
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| 237 | * are added indexed by filename. |
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| 238 | */ |
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[e1c49ce] | 239 | static public Collection<Credential> readZipFile(File zf, |
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| 240 | Collection<KeyPair> keys, Map<String, Exception> errors) |
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| 241 | throws IOException { |
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[5cf72cc] | 242 | Vector<Credential> creds = new Vector<Credential>(); |
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[42ca4b8] | 243 | Vector<ZipEntry> derEntries = new Vector<ZipEntry>(); |
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| 244 | Map<String, Identity> ids = new TreeMap<String, Identity>(); |
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| 245 | Map<String, KeyPair> kps = new TreeMap<String, KeyPair>(); |
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[5cf72cc] | 246 | |
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[e1c49ce] | 247 | ZipFile z = new ZipFile(zf); |
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| 248 | |
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[5cf72cc] | 249 | for (Enumeration<? extends ZipEntry> ze = z.entries(); |
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| 250 | ze.hasMoreElements();) { |
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| 251 | ZipEntry f = ze.nextElement(); |
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| 252 | try { |
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[42ca4b8] | 253 | PEMReader r = new PEMReader( |
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| 254 | new InputStreamReader(z.getInputStream(f))); |
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| 255 | Object o = readPEM(r); |
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| 256 | |
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| 257 | if ( o != null ) { |
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| 258 | if (o instanceof Identity) { |
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| 259 | Identity i = (Identity) o; |
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| 260 | String kid = i.getKeyID(); |
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| 261 | |
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| 262 | if (kps.containsKey(kid) ) { |
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| 263 | i.setKeyPair(kps.get(kid)); |
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| 264 | kps.remove(kid); |
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| 265 | } |
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| 266 | else if (i.getKeyPair() == null ) |
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| 267 | ids.put(i.getKeyID(), i); |
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| 268 | |
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| 269 | Credential.addIdentity(i); |
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| 270 | } |
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| 271 | else if (o instanceof KeyPair ) { |
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| 272 | KeyPair kp = (KeyPair) o; |
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| 273 | String kid = Identity.extractKeyID(kp.getPublic()); |
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| 274 | |
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| 275 | if (ids.containsKey(kid)) { |
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| 276 | Identity i = ids.get(kid); |
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| 277 | |
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| 278 | i.setKeyPair(kp); |
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| 279 | ids.remove(kid); |
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| 280 | } |
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| 281 | else { |
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| 282 | kps.put(kid, kp); |
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| 283 | } |
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| 284 | } |
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[5cf72cc] | 285 | } |
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| 286 | else { |
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[42ca4b8] | 287 | // Not a PEM file |
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| 288 | derEntries.add(f); |
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| 289 | continue; |
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[5cf72cc] | 290 | } |
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| 291 | } |
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| 292 | catch (Exception e ) { |
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| 293 | if (errors != null ) errors.put(f.getName(), e); |
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| 294 | } |
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| 295 | } |
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| 296 | |
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[42ca4b8] | 297 | for ( ZipEntry f : derEntries ) { |
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[5cf72cc] | 298 | try { |
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| 299 | creds.add(new Credential(z.getInputStream(f))); |
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| 300 | } |
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| 301 | catch (Exception e ) { |
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| 302 | if (errors != null ) errors.put(f.getName(), e); |
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| 303 | } |
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| 304 | } |
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| 305 | return creds; |
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| 306 | } |
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| 307 | |
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[e1c49ce] | 308 | static public Collection<Credential> readZipFile(File d) |
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| 309 | throws IOException { |
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[5cf72cc] | 310 | return readZipFile(d, null, null); |
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| 311 | } |
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[e1c49ce] | 312 | static public Collection<Credential> readZipFile(File d, |
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| 313 | Map<String, Exception> errors) throws IOException { |
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[5cf72cc] | 314 | return readZipFile(d, null, errors); |
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| 315 | } |
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[e1c49ce] | 316 | static public Collection<Credential> readZipFile(File d, |
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| 317 | Collection<KeyPair> keys) throws IOException { |
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[5cf72cc] | 318 | return readZipFile(d, keys, null); |
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| 319 | } |
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| 320 | |
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[42ca4b8] | 321 | protected static Object readPEM(PEMReader r) throws IOException { |
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| 322 | Identity i = null; |
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| 323 | KeyPair keys = null; |
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| 324 | Object o = null; |
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| 325 | |
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| 326 | while ( (o = r.readObject()) != null ) { |
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| 327 | if (o instanceof X509CertificateObject) { |
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| 328 | if ( i == null ) { |
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| 329 | try { |
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| 330 | i = new Identity((X509CertificateObject)o); |
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| 331 | } |
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| 332 | catch (Exception e) { |
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| 333 | // Translate Idenitiy exceptions to IOException |
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| 334 | throw new IOException(e); |
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| 335 | } |
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| 336 | if (keys != null ) { |
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| 337 | i.setKeyPair(keys); |
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| 338 | keys = null; |
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| 339 | } |
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| 340 | } |
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| 341 | else throw new IOException("Two certificates"); |
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| 342 | } |
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| 343 | else if (o instanceof KeyPair ) { |
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| 344 | if ( i != null ) i.setKeyPair((KeyPair) o); |
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| 345 | else keys = (KeyPair) o; |
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| 346 | } |
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| 347 | else { |
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| 348 | throw new IOException("Unexpected PEM object: " + |
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| 349 | o.getClass().getName()); |
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| 350 | } |
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| 351 | } |
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| 352 | |
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| 353 | if ( i != null ) return i; |
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| 354 | else if ( keys != null) return keys; |
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| 355 | else return null; |
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| 356 | } |
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[5cf72cc] | 357 | |
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[be05757] | 358 | /** |
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| 359 | * Import a directory full of files. First import all the identities |
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| 360 | * (pem), then the credentials (der) into the credential graph then any |
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| 361 | * alias files into the two maps. If keys is not null, any key pairs in |
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| 362 | * PEM files are put in there. If errors is not null, errors reading files |
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| 363 | * are added indexed by filename. |
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| 364 | */ |
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| 365 | static public Collection<Credential> readDirectory(File d, |
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[5cf72cc] | 366 | Collection<KeyPair> keys, Map<String, Exception> errors) { |
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[be05757] | 367 | Vector<Credential> creds = new Vector<Credential>(); |
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| 368 | Vector<File> derFiles = new Vector<File>(); |
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[e1c49ce] | 369 | Collection<File> files = new Vector<File>(); |
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[42ca4b8] | 370 | Map<String, Identity> ids = new TreeMap<String, Identity>(); |
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| 371 | Map<String, KeyPair> kps = new TreeMap<String, KeyPair>(); |
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[e1c49ce] | 372 | |
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| 373 | if (d.isDirectory() ) |
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| 374 | for (File f : d.listFiles()) |
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| 375 | files.add(f); |
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| 376 | else files.add(d); |
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[be05757] | 377 | |
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[e1c49ce] | 378 | for (File f: files ) { |
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[be05757] | 379 | try { |
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[42ca4b8] | 380 | PEMReader r = new PEMReader(new FileReader(f)); |
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| 381 | Object o = readPEM(r); |
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| 382 | |
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| 383 | if ( o != null ) { |
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| 384 | if (o instanceof Identity) { |
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| 385 | Identity i = (Identity) o; |
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| 386 | String kid = i.getKeyID(); |
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| 387 | |
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| 388 | if (kps.containsKey(kid) ) { |
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| 389 | i.setKeyPair(kps.get(kid)); |
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| 390 | kps.remove(kid); |
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| 391 | } |
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| 392 | else if (i.getKeyPair() == null ) |
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| 393 | ids.put(i.getKeyID(), i); |
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| 394 | |
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| 395 | Credential.addIdentity(i); |
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| 396 | } |
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| 397 | else if (o instanceof KeyPair ) { |
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| 398 | KeyPair kp = (KeyPair) o; |
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| 399 | String kid = Identity.extractKeyID(kp.getPublic()); |
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| 400 | |
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| 401 | if (ids.containsKey(kid)) { |
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| 402 | Identity i = ids.get(kid); |
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| 403 | |
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| 404 | i.setKeyPair(kp); |
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| 405 | ids.remove(kid); |
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| 406 | } |
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| 407 | else { |
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| 408 | kps.put(kid, kp); |
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| 409 | } |
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| 410 | } |
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[be05757] | 411 | } |
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| 412 | else { |
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[42ca4b8] | 413 | // Not a PEM file |
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| 414 | derFiles.add(f); |
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| 415 | continue; |
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[be05757] | 416 | } |
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| 417 | } |
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| 418 | catch (Exception e ) { |
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[5cf72cc] | 419 | if (errors != null ) errors.put(f.getName(), e); |
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[be05757] | 420 | } |
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| 421 | } |
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| 422 | |
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| 423 | for ( File f : derFiles ) { |
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| 424 | try { |
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| 425 | creds.add(new Credential(f)); |
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| 426 | } |
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| 427 | catch (Exception e ) { |
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[5cf72cc] | 428 | if (errors != null ) errors.put(f.getName(), e); |
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[be05757] | 429 | } |
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| 430 | } |
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| 431 | return creds; |
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| 432 | } |
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| 433 | |
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| 434 | static public Collection<Credential> readDirectory(File d) { |
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| 435 | return readDirectory(d, null, null); |
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| 436 | } |
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| 437 | static public Collection<Credential> readDirectory(File d, |
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[5cf72cc] | 438 | Map<String, Exception> errors) { |
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[be05757] | 439 | return readDirectory(d, null, errors); |
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| 440 | } |
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| 441 | static public Collection<Credential> readDirectory(File d, |
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| 442 | Collection<KeyPair> keys) { |
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| 443 | return readDirectory(d, keys, null); |
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| 444 | } |
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| 445 | |
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[5cf72cc] | 446 | static public void writeZipFile(Collection<Credential> creds, File f, |
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[8a93b41] | 447 | boolean allIDs, boolean withPrivateKeys) |
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[5cf72cc] | 448 | throws IOException { |
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| 449 | ZipOutputStream z = new ZipOutputStream(new FileOutputStream(f)); |
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| 450 | Set<Identity> ids = allIDs ? |
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[8a6181b] | 451 | new TreeSet<Identity>(s_ids) : new TreeSet<Identity>(); |
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[5cf72cc] | 452 | |
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| 453 | int n = 0; |
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| 454 | for (Credential c: creds) { |
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| 455 | z.putNextEntry(new ZipEntry("attr" + n++ + ".der")); |
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| 456 | c.write(z); |
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| 457 | z.closeEntry(); |
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| 458 | if ( c.getID() != null && !allIDs) ids.add(c.getID()); |
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| 459 | } |
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| 460 | for (Identity i: ids) { |
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| 461 | z.putNextEntry(new ZipEntry(i.getName() + ".pem")); |
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| 462 | i.write(z); |
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[8a93b41] | 463 | if (withPrivateKeys) |
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| 464 | i.writePrivateKey(z); |
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[5cf72cc] | 465 | z.closeEntry(); |
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| 466 | } |
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| 467 | z.close(); |
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| 468 | } |
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| 469 | |
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| 470 | |
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[be05757] | 471 | private Role m_head, m_tail; |
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[90f939f] | 472 | |
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[be05757] | 473 | private X509V2AttributeCertificate m_ac; |
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| 474 | private Identity m_id; |
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[7ef13e3] | 475 | |
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[e1c49ce] | 476 | /** |
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| 477 | * Put the Identity into the set of ids used to validate certificates. |
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| 478 | * Also put the keyID and name into the translation mappings used by Roles |
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| 479 | * to pretty print. In the role mapping, if multiple ids use the same |
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| 480 | * common name they are disambiguated. Only one entry for keyid is |
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| 481 | * allowed. |
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| 482 | */ |
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[de63a31] | 483 | public static void addIdentity(Identity id) { |
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| 484 | s_ids.add(id); |
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[e1c49ce] | 485 | if (id.getName() != null && id.getKeyID() != null) { |
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| 486 | if ( !Role.key_in_mapping(id.getKeyID()) ) { |
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| 487 | String name = id.getName(); |
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| 488 | int n= 1; |
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| 489 | |
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| 490 | while (Role.name_in_mapping(name)) { |
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| 491 | name = id.getName() + n++; |
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| 492 | } |
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| 493 | Role.add_mapping(name, id.getKeyID()); |
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| 494 | } |
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| 495 | } |
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[de63a31] | 496 | } |
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[9725efb] | 497 | public static Collection<Identity> identities() { return s_ids; } |
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[e1c49ce] | 498 | public static void clearIdentities() { |
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| 499 | s_ids.clear(); Role.clear_mapping(); |
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| 500 | } |
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[31b67d5] | 501 | } |
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