1 | package net.deterlab.abac; |
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2 | |
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3 | import java.io.*; |
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4 | import java.math.*; |
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5 | |
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6 | import java.util.*; |
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7 | import java.util.zip.*; |
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8 | import java.security.*; |
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9 | import java.security.cert.*; |
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10 | |
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11 | import net.deterlab.abac.Identity; |
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12 | |
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13 | import org.bouncycastle.asn1.*; |
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14 | import org.bouncycastle.x509.*; |
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15 | import org.bouncycastle.jce.X509Principal; |
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16 | import org.bouncycastle.jce.provider.X509AttrCertParser; |
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17 | import org.bouncycastle.jce.provider.X509CertificateObject; |
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18 | import org.bouncycastle.openssl.PEMReader; |
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19 | |
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20 | import org.bouncycastle.asn1.util.ASN1Dump; |
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21 | |
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22 | import java.security.PrivateKey; |
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23 | |
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24 | public class Credential { |
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25 | protected static Vector<Identity> s_ids = new Vector<Identity>(); |
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26 | protected static String attrOID = "1.3.6.1.5.5.7.10.4"; |
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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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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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44 | m_ac = null; |
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45 | m_id = null; |
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46 | } |
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47 | |
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48 | /** |
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49 | * Do the credential initialization from a filename. |
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50 | */ |
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51 | protected void init(InputStream stream) throws Exception { |
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52 | X509AttrCertParser parser = new X509AttrCertParser(); |
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53 | parser.engineInit(stream); |
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54 | m_ac = (X509V2AttributeCertificate)parser.engineRead(); |
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55 | m_id = null; |
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56 | |
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57 | if ( m_ac == null ) throw new IOException("Invalid Credential Format"); |
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58 | |
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59 | for (Identity id: s_ids) { |
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60 | try { |
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61 | m_ac.verify(id.getCertificate().getPublicKey(), "BC"); |
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62 | m_id = id; |
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63 | break; |
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64 | } |
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65 | catch (InvalidKeyException e) { } |
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66 | } |
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67 | if (m_id == null) throw new InvalidKeyException("Unknown identity"); |
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68 | |
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69 | load_roles(); |
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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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73 | } |
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74 | |
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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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80 | init(new FileInputStream(filename)); |
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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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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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96 | } |
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97 | |
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98 | public void make_cert(PrivateKey key) { |
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99 | X509V2AttributeCertificateGenerator gen = |
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100 | new X509V2AttributeCertificateGenerator(); |
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101 | |
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102 | gen.setIssuer(new AttributeCertificateIssuer( |
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103 | new X509Principal("CN="+m_head.issuer_part()))); |
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104 | gen.setHolder(new AttributeCertificateHolder( |
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105 | new X509Principal("CN="+m_head.issuer_part()))); |
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106 | gen.setNotAfter(new Date(System.currentTimeMillis() |
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107 | + 3600 * 1000 * 24 * 365)); |
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108 | gen.setNotBefore(new Date(System.currentTimeMillis())); |
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109 | gen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis())); |
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110 | gen.addAttribute(new X509Attribute(attrOID, |
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111 | new DERSequence( |
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112 | new DERSequence( |
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113 | new DERUTF8String(toString()))))); |
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114 | gen.setSignatureAlgorithm("SHA256WithRSAEncryption"); |
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115 | |
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116 | try { |
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117 | m_ac = (X509V2AttributeCertificate) gen.generate(key, "BC"); |
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118 | } |
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119 | catch (Exception e) { |
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120 | System.err.println(e); |
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121 | } |
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122 | } |
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123 | |
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124 | /** |
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125 | * Load the roles off the attribute cert. Throws a RuntimeException if |
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126 | * there's something wrong with the cert. |
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127 | */ |
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128 | private void load_roles() throws RuntimeException { |
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129 | String roles = null; |
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130 | try { |
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131 | X509Attribute attr = m_ac.getAttributes()[0]; |
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132 | |
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133 | //System.err.println(ASN1Dump.dumpAsString(attr)); |
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134 | |
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135 | DERSequence java = (DERSequence)attr.getValues()[0]; |
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136 | DERSequence fucking = (DERSequence)java.getObjectAt(0); |
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137 | DERUTF8String sucks = (DERUTF8String)fucking.getObjectAt(0); |
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138 | |
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139 | roles = sucks.getString(); |
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140 | } |
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141 | catch (Exception e) { |
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142 | throw new RuntimeException("Your attribute certificate is funky and I'm not gonna debug it", e); |
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143 | } |
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144 | |
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145 | String[] parts = roles.split("\\s*<--?\\s*"); |
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146 | if (parts.length != 2) |
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147 | throw new RuntimeException("Invalid attribute: " + roles); |
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148 | |
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149 | m_head = new Role(parts[0]); |
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150 | m_tail = new Role(parts[1]); |
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151 | } |
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152 | |
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153 | /** |
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154 | * Two credentials are the same if their roles are the same. |
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155 | */ |
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156 | public boolean equals(Object o) { |
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157 | if ( o instanceof Credential ) { |
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158 | Credential c = (Credential) o; |
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159 | |
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160 | if (m_head == null || m_tail == null ) return false; |
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161 | else return (m_head.equals(c.head()) && m_tail.equals(c.tail())); |
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162 | } |
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163 | else return false; |
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164 | } |
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165 | |
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166 | /** |
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167 | * Get the head role from the credential. |
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168 | */ |
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169 | public Role head() { |
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170 | return m_head; |
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171 | } |
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172 | |
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173 | /** |
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174 | * Get the tail role from the credential |
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175 | */ |
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176 | public Role tail() { |
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177 | return m_tail; |
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178 | } |
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179 | |
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180 | /** |
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181 | * Gets the cert associated with this credential (if any). |
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182 | */ |
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183 | public X509V2AttributeCertificate cert() { |
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184 | return m_ac; |
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185 | } |
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186 | |
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187 | /** |
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188 | * Turn the credential into string form. The format is head <- tail. For |
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189 | * example: A.r1 <- B.r2.r3. |
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190 | */ |
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191 | public String toString() { |
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192 | return m_head + " <- " + m_tail; |
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193 | } |
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194 | |
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195 | public String simpleString() { |
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196 | return m_head.simpleString() + " <- " + m_tail.simpleString(); |
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197 | } |
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198 | |
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199 | public void write(OutputStream s) throws IOException { |
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200 | s.write(m_ac.getEncoded()); |
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201 | } |
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202 | |
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203 | public void write(String fn) throws IOException, FileNotFoundException { |
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204 | write(new FileOutputStream(fn)); |
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205 | } |
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206 | |
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207 | public boolean hasCertificate() { return m_ac != null; } |
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208 | |
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209 | public Identity getID() { return m_id; } |
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210 | |
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211 | /** |
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212 | * Import a zip file. First import all the identities |
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213 | * (pem), then the credentials (der) into the credential graph then any |
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214 | * alias files into the two maps. If keys is not null, any key pairs in |
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215 | * PEM files are put in there. If errors is not null, errors reading files |
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216 | * are added indexed by filename. |
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217 | */ |
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218 | static public Collection<Credential> readZipFile(ZipFile z, |
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219 | Collection<KeyPair> keys, Map<String, Exception> errors) { |
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220 | Vector<Credential> creds = new Vector<Credential>(); |
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221 | Vector<ZipEntry> derFiles = new Vector<ZipEntry>(); |
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222 | |
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223 | for (Enumeration<? extends ZipEntry> ze = z.entries(); |
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224 | ze.hasMoreElements();) { |
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225 | ZipEntry f = ze.nextElement(); |
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226 | Object o = null; |
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227 | try { |
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228 | o = new PEMReader(new InputStreamReader( |
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229 | z.getInputStream(f))).readObject(); |
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230 | } |
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231 | catch (IOException e) { |
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232 | // PEMReader couldn't deal, so we assume it's a DER |
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233 | derFiles.add(f); |
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234 | continue; |
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235 | } |
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236 | try { |
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237 | if ( o == null ) { |
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238 | // This shouldn't be, but assume it's a DER |
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239 | derFiles.add(f); |
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240 | } |
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241 | else if (o instanceof X509CertificateObject) { |
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242 | Credential.addIdentity( |
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243 | new Identity((X509CertificateObject)o)); |
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244 | } |
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245 | else if (o instanceof KeyPair ) { |
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246 | if ( keys != null ) keys.add((KeyPair) o); |
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247 | } |
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248 | else { |
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249 | throw new IOException("Unexpected PEM object: " + |
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250 | o.getClass().getName()); |
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251 | } |
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252 | } |
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253 | catch (Exception e ) { |
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254 | if (errors != null ) errors.put(f.getName(), e); |
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255 | } |
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256 | } |
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257 | |
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258 | for ( ZipEntry f : derFiles ) { |
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259 | try { |
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260 | creds.add(new Credential(z.getInputStream(f))); |
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261 | } |
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262 | catch (Exception e ) { |
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263 | if (errors != null ) errors.put(f.getName(), e); |
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264 | } |
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265 | } |
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266 | return creds; |
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267 | } |
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268 | |
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269 | static public Collection<Credential> readZipFile(ZipFile d) { |
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270 | return readZipFile(d, null, null); |
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271 | } |
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272 | static public Collection<Credential> readZipFile(ZipFile d, |
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273 | Map<String, Exception> errors) { |
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274 | return readZipFile(d, null, errors); |
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275 | } |
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276 | static public Collection<Credential> readZipFile(ZipFile d, |
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277 | Collection<KeyPair> keys) { |
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278 | return readZipFile(d, keys, null); |
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279 | } |
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280 | |
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281 | |
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282 | /** |
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283 | * Import a directory full of files. First import all the identities |
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284 | * (pem), then the credentials (der) into the credential graph then any |
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285 | * alias files into the two maps. If keys is not null, any key pairs in |
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286 | * PEM files are put in there. If errors is not null, errors reading files |
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287 | * are added indexed by filename. |
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288 | */ |
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289 | static public Collection<Credential> readDirectory(File d, |
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290 | Collection<KeyPair> keys, Map<String, Exception> errors) { |
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291 | Vector<Credential> creds = new Vector<Credential>(); |
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292 | Vector<File> derFiles = new Vector<File>(); |
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293 | |
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294 | for (File f: d.listFiles() ) { |
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295 | Object o = null; |
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296 | try { |
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297 | o = new PEMReader(new FileReader(f)).readObject(); |
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298 | } |
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299 | catch (IOException e) { |
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300 | // PEMReader couldn't deal, so we assume it's a DER |
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301 | derFiles.add(f); |
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302 | continue; |
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303 | } |
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304 | try { |
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305 | if ( o == null ) { |
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306 | // This shouldn't be, but assume it's a DER |
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307 | derFiles.add(f); |
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308 | } |
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309 | else if (o instanceof X509CertificateObject) { |
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310 | Credential.addIdentity( |
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311 | new Identity((X509CertificateObject)o)); |
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312 | } |
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313 | else if (o instanceof KeyPair ) { |
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314 | if ( keys != null ) keys.add((KeyPair) o); |
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315 | } |
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316 | else { |
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317 | throw new IOException("Unexpected PEM object: " + |
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318 | o.getClass().getName()); |
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319 | } |
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320 | } |
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321 | catch (Exception e ) { |
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322 | if (errors != null ) errors.put(f.getName(), e); |
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323 | } |
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324 | } |
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325 | |
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326 | for ( File f : derFiles ) { |
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327 | try { |
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328 | creds.add(new Credential(f)); |
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329 | } |
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330 | catch (Exception e ) { |
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331 | if (errors != null ) errors.put(f.getName(), e); |
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332 | } |
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333 | } |
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334 | return creds; |
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335 | } |
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336 | |
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337 | static public Collection<Credential> readDirectory(File d) { |
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338 | return readDirectory(d, null, null); |
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339 | } |
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340 | static public Collection<Credential> readDirectory(File d, |
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341 | Map<String, Exception> errors) { |
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342 | return readDirectory(d, null, errors); |
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343 | } |
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344 | static public Collection<Credential> readDirectory(File d, |
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345 | Collection<KeyPair> keys) { |
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346 | return readDirectory(d, keys, null); |
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347 | } |
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348 | |
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349 | static public void writeZipFile(Collection<Credential> creds, File f, |
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350 | boolean allIDs) |
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351 | throws IOException { |
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352 | ZipOutputStream z = new ZipOutputStream(new FileOutputStream(f)); |
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353 | Set<Identity> ids = allIDs ? |
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354 | new TreeSet(s_ids) : new TreeSet<Identity>(); |
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355 | |
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356 | int n = 0; |
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357 | for (Credential c: creds) { |
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358 | z.putNextEntry(new ZipEntry("attr" + n++ + ".der")); |
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359 | c.write(z); |
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360 | z.closeEntry(); |
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361 | if ( c.getID() != null && !allIDs) ids.add(c.getID()); |
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362 | } |
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363 | for (Identity i: ids) { |
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364 | z.putNextEntry(new ZipEntry(i.getName() + ".pem")); |
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365 | i.write(z); |
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366 | z.closeEntry(); |
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367 | } |
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368 | z.close(); |
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369 | } |
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370 | |
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371 | |
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372 | private Role m_head, m_tail; |
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373 | |
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374 | private X509V2AttributeCertificate m_ac; |
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375 | private Identity m_id; |
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376 | |
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377 | public static void addIdentity(Identity id) { |
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378 | s_ids.add(id); |
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379 | if (id.getName() != null && id.getKeyID() != null) |
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380 | Role.add_mapping(id.getName(), id.getKeyID()); |
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381 | } |
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382 | public static Collection<Identity> identities() { return s_ids; } |
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383 | } |
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