[9725efb] | 1 | package net.deterlab.abac; |
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| 2 | |
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| 3 | import java.io.*; |
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| 4 | |
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| 5 | import java.util.*; |
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| 6 | import java.security.*; |
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| 7 | import java.security.cert.*; |
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| 8 | |
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| 9 | |
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| 10 | import org.bouncycastle.asn1.*; |
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| 11 | import org.bouncycastle.asn1.util.*; |
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| 12 | import org.bouncycastle.asn1.x509.*; |
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| 13 | import org.bouncycastle.x509.*; |
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| 14 | import org.bouncycastle.jce.provider.X509AttrCertParser; |
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| 15 | import org.bouncycastle.jce.provider.X509CertificateObject; |
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| 16 | import org.bouncycastle.openssl.PEMReader; |
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[1a7e6d3] | 17 | import org.bouncycastle.openssl.PEMWriter; |
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[9725efb] | 18 | |
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| 19 | public class Identity { |
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| 20 | private X509CertificateObject m_cert; |
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| 21 | private String m_keyid; |
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| 22 | private String m_cn; |
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| 23 | |
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[1a7e6d3] | 24 | /** |
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| 25 | * Initialize internals from PEM cert in a reader. Use a PEMReader to get |
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[8a14e37] | 26 | * the certificate, and call init(cert) on it. |
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[1a7e6d3] | 27 | */ |
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[8a14e37] | 28 | protected void init(Reader r) throws |
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[9725efb] | 29 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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[1a7e6d3] | 30 | NoSuchProviderException, SignatureException, IOException { |
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| 31 | PEMReader pr = new PEMReader(r); |
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[9725efb] | 32 | Object c = pr.readObject(); |
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| 33 | |
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[8a14e37] | 34 | if (c instanceof X509CertificateObject) |
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| 35 | init((X509CertificateObject)c); |
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| 36 | else |
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| 37 | throw new CertificateException("Not an identity certificate"); |
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| 38 | } |
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| 39 | |
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| 40 | /** |
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| 41 | * Initialize internals from cert. Confirm it is self signed, and then |
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| 42 | * the keyid and common name. There's some work to get this stuff, but |
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| 43 | * it's all an incantation of getting the right classes to get the right |
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| 44 | * data. Looks more complex than it is. |
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| 45 | */ |
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| 46 | protected void init(X509CertificateObject c) throws |
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| 47 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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| 48 | NoSuchProviderException, SignatureException, IOException { |
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| 49 | m_cert = (X509CertificateObject) c; |
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| 50 | m_cert.verify(m_cert.getPublicKey()); |
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| 51 | // Cert is valid, fill in the CN and keyid |
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| 52 | m_keyid = extractKeyID(m_cert.getPublicKey()); |
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| 53 | m_cn = m_cert.getSubjectDN().getName(); |
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| 54 | /// XXX: better parse |
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| 55 | if (m_cn.startsWith("CN=")) m_cn = m_cn.substring(3); |
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[9725efb] | 56 | } |
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| 57 | |
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[1a7e6d3] | 58 | /** |
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| 59 | * Construct from a string, which is a filename, containing a PEM format |
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| 60 | * self signed certificate. |
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| 61 | */ |
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[9725efb] | 62 | public Identity(String filename) throws |
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| 63 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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| 64 | NoSuchProviderException, SignatureException, FileNotFoundException, |
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[1a7e6d3] | 65 | IOException { init(new FileReader(filename)); } |
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[9725efb] | 66 | |
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| 67 | |
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[1a7e6d3] | 68 | /** |
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| 69 | * Construct from a file, containing a self-signed PEM certificate. |
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| 70 | */ |
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[9725efb] | 71 | public Identity(File file) throws |
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| 72 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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| 73 | NoSuchProviderException, SignatureException, FileNotFoundException, |
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[1a7e6d3] | 74 | IOException { init(new FileReader(file)); } |
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| 75 | |
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| 76 | /** |
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| 77 | * Construct from a reader, containing a self-signed PEM certificate. |
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| 78 | */ |
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| 79 | public Identity(Reader r) throws |
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| 80 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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| 81 | NoSuchProviderException, SignatureException, IOException { init(r); } |
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| 82 | |
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| 83 | /** |
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| 84 | * Construct from an InputStream, containing a self-signed PEM certificate. |
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| 85 | */ |
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| 86 | public Identity(InputStream s) throws |
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| 87 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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| 88 | NoSuchProviderException, SignatureException, IOException { |
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| 89 | init(new InputStreamReader(s)); |
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| 90 | } |
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| 91 | |
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[8a14e37] | 92 | /** |
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| 93 | * Construct from an X509CertificateObject, if you parsed one somewhere |
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| 94 | * else. |
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| 95 | */ |
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| 96 | public Identity(X509CertificateObject cert) throws |
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| 97 | CertificateException, NoSuchAlgorithmException,InvalidKeyException, |
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| 98 | NoSuchProviderException, SignatureException, FileNotFoundException, |
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| 99 | IOException { init(cert); } |
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| 100 | |
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[1a7e6d3] | 101 | |
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| 102 | /** |
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| 103 | * Write the PEM cert to the given writer. |
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| 104 | */ |
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| 105 | public void write(Writer w) throws IOException { |
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| 106 | PEMWriter pw = new PEMWriter(w); |
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| 107 | |
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| 108 | pw.writeObject(m_cert); |
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| 109 | pw.close(); |
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| 110 | } |
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| 111 | |
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| 112 | /** |
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| 113 | * Write the PEM cert to a file with the given name. |
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| 114 | */ |
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| 115 | public void write(String fn) throws IOException, FileNotFoundException { |
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| 116 | write(new FileWriter(fn)); |
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| 117 | } |
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| 118 | |
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| 119 | /** |
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| 120 | * Write the PEM cert to the given file. |
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| 121 | */ |
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| 122 | public void write(File fn) throws IOException, FileNotFoundException { |
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| 123 | write(new FileWriter(fn)); |
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| 124 | } |
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| 125 | |
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| 126 | /** |
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| 127 | * Write the PEM cert to the given OutputStream. |
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| 128 | */ |
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| 129 | public void write(OutputStream s) |
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| 130 | throws IOException, FileNotFoundException { |
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| 131 | write(new OutputStreamWriter(s)); |
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| 132 | } |
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[9725efb] | 133 | |
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[8a14e37] | 134 | /** |
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| 135 | * Get to the SHA1 hash of the key. |
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| 136 | */ |
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| 137 | public static String extractKeyID(PublicKey k) { |
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| 138 | ASN1Sequence seq = null; |
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| 139 | try { |
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| 140 | seq = (ASN1Sequence) new ASN1InputStream( |
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| 141 | k.getEncoded()).readObject(); |
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| 142 | } |
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| 143 | catch (IOException ie) { |
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| 144 | // Badly formatted key?? |
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| 145 | return null; |
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| 146 | } |
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| 147 | SubjectPublicKeyInfo ki = new SubjectPublicKeyInfo(seq); |
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| 148 | SubjectKeyIdentifier id = |
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| 149 | SubjectKeyIdentifier.createSHA1KeyIdentifier(ki); |
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| 150 | |
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| 151 | // Now format it into a string for keeps |
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| 152 | Formatter fmt = new Formatter(new StringWriter()); |
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| 153 | for (byte b: id.getKeyIdentifier()) |
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| 154 | fmt.format("%02x", b); |
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| 155 | return fmt.out().toString(); |
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| 156 | } |
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| 157 | |
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[1a7e6d3] | 158 | // Accessors |
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[9725efb] | 159 | public String getKeyID() { return m_keyid; } |
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| 160 | public String getName() { return m_cn; } |
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| 161 | public String toString() { return m_keyid + " (" + m_cn + ")"; } |
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| 162 | public X509CertificateObject getCertificate() { return m_cert; } |
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[1a7e6d3] | 163 | |
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[9725efb] | 164 | }; |
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