1 | package net.deterlab.abac; |
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2 | |
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3 | import edu.uci.ics.jung.graph.*; |
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4 | import edu.uci.ics.jung.graph.util.*; |
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5 | |
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6 | import java.io.*; |
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7 | import java.util.*; |
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8 | import java.util.regex.*; |
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9 | import java.util.zip.*; |
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10 | import java.security.*; |
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11 | import java.security.cert.*; |
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12 | |
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13 | import org.bouncycastle.asn1.*; |
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14 | import org.bouncycastle.asn1.x509.*; |
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15 | import org.bouncycastle.x509.*; |
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16 | import org.bouncycastle.openssl.*; |
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17 | import org.bouncycastle.jce.provider.BouncyCastleProvider; |
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18 | |
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19 | /** |
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20 | * Represents a global graph of credentials in the form of principals and |
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21 | * attributes. Contains the identities and credentials that can be used in a |
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22 | * proof. |
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23 | * @author <a href="http://abac.deterlab.net">ISI ABAC team</a> |
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24 | * @version 1.4 |
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25 | */ |
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26 | public class Context { |
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27 | /** Certificate imported successfully */ |
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28 | public static final int ABAC_CERT_SUCCESS = 0; |
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29 | /** Certificate import failed, invalid certificate */ |
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30 | public static final int ABAC_CERT_INVALID = -1; |
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31 | /** Certificate import failed, signature filed */ |
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32 | public static final int ABAC_CERT_BAD_SIG = -2; |
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33 | /** Certificate import failed, unknown issuer */ |
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34 | public static final int ABAC_CERT_MISSING_ISSUER = -3; |
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35 | |
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36 | /** Internal graph representation */ |
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37 | protected Graph<Role,Credential> g; |
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38 | /** Set of edges in the graph that were added by the logic. */ |
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39 | protected Set<Credential> derived_edges; |
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40 | /** Internal persistent query object */ |
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41 | protected Query pq; |
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42 | /** True when the graph has been changed since the last set of implied |
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43 | * edges were calculated. */ |
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44 | protected boolean dirty; |
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45 | /** Set of identities known to this Context. */ |
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46 | protected Set<Identity> m_identities; |
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47 | /** The CredentialFactory for this Context */ |
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48 | protected CredentialFactory credentialFactory; |
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49 | |
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50 | /** Translation from issuer CN to issuer pubkey identifier */ |
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51 | protected Map<String, String> nicknames; |
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52 | /** Translation from issuer pubkey identifier to issuer CN */ |
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53 | protected Map<String, String> keys; |
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54 | |
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55 | /** True once BouncyCastle has been loaded. */ |
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56 | static boolean providerLoaded = false; |
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57 | |
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58 | /** |
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59 | * Load the BouncyCastle provider, necessary for ABAC crypto (shouldn't |
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60 | * need to be called directly). This is called from the Context static |
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61 | * constructor and static constructors in other ABAC classes that use |
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62 | * BouncyCastle crypto (which loads a Context, which calls it as well) to |
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63 | * make sure crypto is available. |
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64 | */ |
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65 | static void loadBouncyCastle() { |
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66 | if ( !providerLoaded ) { |
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67 | AccessController.doPrivileged(new PrivilegedAction<Object>() { |
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68 | public Object run() { |
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69 | Security.addProvider(new BouncyCastleProvider()); |
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70 | return null; |
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71 | } |
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72 | }); |
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73 | providerLoaded = true; |
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74 | } |
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75 | } |
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76 | |
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77 | /** Load the BouncyCastle provider. */ |
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78 | static { loadBouncyCastle(); }; |
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79 | |
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80 | /** |
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81 | * The result of a query on this context. The credentials form a partial |
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82 | * or total proof, and success indicates whether the proof succeeded. |
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83 | * @author <a href="http://abac.deterlab.net">ISI ABAC team</a> |
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84 | * @version 1.4 |
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85 | */ |
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86 | public class QueryResult { |
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87 | /** Credentials returned */ |
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88 | protected Collection<Credential> creds; |
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89 | /** True if the proof succeeded. */ |
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90 | protected boolean success; |
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91 | |
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92 | /** |
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93 | * Construct a result from components. |
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94 | * @param c the collection of credentials in the proof |
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95 | * @param s a boolean, true if the query succeeded. |
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96 | */ |
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97 | QueryResult(Collection<Credential> c, boolean s) { |
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98 | creds = c; |
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99 | success = s; |
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100 | } |
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101 | |
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102 | /** |
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103 | * Empty constructor |
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104 | */ |
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105 | public QueryResult() { |
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106 | creds = new TreeSet<Credential>(); |
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107 | success = false; |
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108 | } |
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109 | |
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110 | /** |
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111 | * Return the credentials in the proof. |
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112 | * @return the collection of credentials |
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113 | */ |
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114 | public Collection<Credential> getCredentials() { return creds; } |
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115 | /** |
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116 | * Return the success in the proof. |
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117 | * @return the boolean, true on success |
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118 | */ |
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119 | public boolean getSuccess() { return success; } |
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120 | } |
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121 | |
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122 | |
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123 | /** |
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124 | * Create an empty Context. |
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125 | */ |
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126 | public Context() { |
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127 | /* create the graph */ |
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128 | g = Graphs.<Role,Credential>synchronizedDirectedGraph( |
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129 | new DirectedSparseGraph<Role,Credential>()); |
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130 | derived_edges = new HashSet<Credential>(); |
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131 | pq = new Query(g); |
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132 | dirty = false; |
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133 | m_identities = new TreeSet<Identity>(); |
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134 | nicknames = new TreeMap<String, String>(); |
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135 | keys = new TreeMap<String, String>(); |
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136 | try { |
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137 | credentialFactory = new CredentialFactory(); |
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138 | } |
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139 | catch (ABACException ignored) { } |
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140 | } |
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141 | |
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142 | /** |
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143 | * Create a context from another context. |
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144 | * @param c the Context to copy |
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145 | */ |
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146 | public Context(Context c) { |
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147 | this(); |
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148 | for (Identity i: c.m_identities) |
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149 | load_id_chunk(i); |
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150 | for (Credential cr: c.credentials()) |
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151 | load_attribute_chunk(cr); |
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152 | derive_implied_edges(); |
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153 | try { |
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154 | credentialFactory = (CredentialFactory) c.credentialFactory.clone(); |
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155 | } |
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156 | catch (CloneNotSupportedException ignored) { } |
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157 | } |
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158 | |
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159 | /** |
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160 | * Create a Context from a collection of Credentials. A jabac extension. |
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161 | * @param creds the collection of credentials |
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162 | */ |
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163 | public Context(Collection<Credential> creds) { |
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164 | this(); |
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165 | for (Credential c: creds) { |
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166 | Identity i = c.issuer(); |
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167 | |
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168 | if (i != null ) load_id_chunk(i); |
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169 | load_attribute_chunk(c); |
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170 | } |
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171 | } |
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172 | |
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173 | /** |
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174 | * Load an Identity from a file. |
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175 | * @param fn a String containing the file name. |
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176 | * @return one of the static int return codes. |
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177 | */ |
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178 | public int load_id_file(String fn) { return load_id_chunk(new File(fn)); } |
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179 | /** |
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180 | * Load an Identity from a file. |
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181 | * @param fn a File containing the file name. |
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182 | * @return one of the static int return codes. |
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183 | */ |
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184 | public int load_id_file(File fn) { return load_id_chunk(fn); } |
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185 | /** |
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186 | * Load an Identity from an object. Supported objects are an Identity, a |
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187 | * String, a File, or a java.security.cert.X509Certificate. A string |
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188 | * creates an new identity, and the others are derived from the contents of |
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189 | * the data or file. |
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190 | * @param c an object convertable to an identity as above. |
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191 | * @return one of the static int return codes. |
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192 | */ |
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193 | public int load_id_chunk(Object c) { |
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194 | try { |
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195 | if (c instanceof Identity) |
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196 | addIdentity((Identity) c); |
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197 | else if (c instanceof String) |
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198 | addIdentity(new Identity((String) c)); |
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199 | else if (c instanceof File) |
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200 | addIdentity(new Identity((File) c)); |
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201 | else if (c instanceof X509Certificate) |
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202 | addIdentity(new Identity((X509Certificate) c)); |
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203 | else |
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204 | return ABAC_CERT_INVALID; |
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205 | } |
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206 | catch (BadSignatureException sig) { |
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207 | return ABAC_CERT_BAD_SIG; |
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208 | } |
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209 | catch (Exception e) { |
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210 | return ABAC_CERT_INVALID; |
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211 | } |
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212 | return ABAC_CERT_SUCCESS; |
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213 | } |
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214 | |
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215 | /** |
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216 | * Load an attribute certificate from a file. |
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217 | * @param fn a String containing the file name. |
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218 | * @return one of the static int return codes. |
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219 | */ |
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220 | public int load_attribute_file(String fn) { |
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221 | return load_attribute_chunk(new File(fn)); |
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222 | } |
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223 | |
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224 | /** |
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225 | * Load an attribute certificate from a file. |
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226 | * @param fn a File containing the file name. |
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227 | * @return one of the static int return codes. |
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228 | */ |
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229 | public int load_attribute_file(File fn) { return load_attribute_chunk(fn); } |
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230 | |
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231 | /** |
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232 | * Load an Credential from an object. Supported objects are a Credential, a |
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233 | * String, a File, or an org.bouncycastle.x509.X509V2AttributeCertificate. |
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234 | * A string creates an new Credential, and the others are derived from the |
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235 | * contents of the data or file. |
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236 | * @param c an object convertable to a Credential as above. |
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237 | * @return one of the static int return codes. |
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238 | */ |
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239 | public int load_attribute_chunk(Object c) { |
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240 | try { |
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241 | Credential[] creds = null; |
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242 | |
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243 | if (c instanceof Credential) { |
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244 | add_credential((Credential) c); |
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245 | return ABAC_CERT_SUCCESS; |
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246 | } else if (c instanceof String) { |
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247 | creds = credentialFactory.parseCredential( |
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248 | (String) c, m_identities); |
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249 | } else if (c instanceof File) { |
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250 | creds = credentialFactory.parseCredential( |
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251 | (File) c, m_identities); |
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252 | } else if ( c instanceof X509V2AttributeCertificate) { |
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253 | add_credential(new X509Credential((X509V2AttributeCertificate)c, |
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254 | m_identities)); |
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255 | return ABAC_CERT_SUCCESS; |
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256 | } else return ABAC_CERT_INVALID; |
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257 | |
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258 | if ( creds == null ) |
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259 | return ABAC_CERT_INVALID; |
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260 | |
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261 | for (Credential cc: creds ) |
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262 | add_credential(cc); |
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263 | } |
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264 | catch (MissingIssuerException sig) { |
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265 | return ABAC_CERT_MISSING_ISSUER ; |
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266 | } |
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267 | catch (BadSignatureException sig) { |
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268 | return ABAC_CERT_BAD_SIG; |
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269 | } |
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270 | catch (CertInvalidException e) { |
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271 | return ABAC_CERT_INVALID; |
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272 | } |
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273 | catch (ABACException ae) { |
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274 | return ABAC_CERT_INVALID; |
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275 | } |
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276 | return ABAC_CERT_SUCCESS; |
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277 | } |
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278 | |
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279 | /** |
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280 | * Determine if prinicpal possesses role in the current context. If so, |
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281 | * return a proof of that, otherwise return a partial proof of it. |
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282 | * @param role a String encoding the role to check for. |
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283 | * @param principal a String with the principal ID in it. |
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284 | * @return a Context.QueryResult containing the result. |
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285 | */ |
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286 | public QueryResult query(String role, String principal) { |
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287 | derive_implied_edges(); |
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288 | |
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289 | Query q = new Query(g); |
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290 | Graph<Role, Credential> rg = q.run(role, principal); |
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291 | TreeSet<Credential> tr = new TreeSet<Credential>(); |
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292 | |
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293 | // Weed out internal credentials before returning |
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294 | for ( Credential c: rg.getEdges()) |
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295 | if (!(c instanceof InternalCredential)) tr.add(c); |
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296 | |
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297 | return new QueryResult(tr, q.successful()); |
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298 | } |
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299 | |
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300 | /** |
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301 | * Return a collection of the credentials in the graph.s |
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302 | * @return a collection of the credentials in the graph. |
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303 | */ |
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304 | public Collection<Credential> credentials() { |
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305 | Collection<Credential> creds = new HashSet<Credential>(); |
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306 | |
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307 | // only non-derived edges |
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308 | for (Credential cred : g.getEdges()) |
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309 | if (!derived_edges.contains(cred)) |
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310 | creds.add(cred); |
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311 | |
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312 | return creds; |
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313 | } |
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314 | |
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315 | /** |
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316 | * Return all the Identities known in this context. A jabac extension. |
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317 | * @return all the Identities known in this context. |
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318 | */ |
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319 | public Collection<Identity> identities() { |
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320 | return m_identities; |
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321 | } |
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322 | |
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323 | /** |
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324 | * Returns true if the given Identity is known in this Context. A jabac |
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325 | * extension. |
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326 | * @param i the Identity to look for |
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327 | * @return a boolean, true if the Identity is known. |
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328 | */ |
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329 | public boolean knowsIdentity(Identity i) { return m_identities.contains(i);} |
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330 | /** |
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331 | * Returns true if an Identity with the given string representation is |
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332 | * known in this Context. A jabac extension. |
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333 | * @param k the string representing the Identity to look for |
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334 | * @return a boolean, true if the Identity is known. |
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335 | */ |
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336 | public boolean knowsKeyID(String k) { |
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337 | boolean known = false; |
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338 | for (Identity i: m_identities) |
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339 | if (k.equals(i.getKeyID())) return true; |
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340 | return false; |
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341 | } |
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342 | |
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343 | |
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344 | /** |
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345 | * Add a credential to the graph. |
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346 | * @param cred the Credential to add |
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347 | */ |
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348 | protected void add_credential(Credential cred) { |
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349 | Role tail = cred.tail(); |
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350 | Role head = cred.head(); |
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351 | |
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352 | // explicitly add the vertices, to avoid a null pointer exception |
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353 | if ( !g.containsVertex(head)) |
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354 | g.addVertex(head); |
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355 | if ( !g.containsVertex(tail)) |
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356 | g.addVertex(tail); |
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357 | |
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358 | if (!g.containsEdge(cred)) |
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359 | g.addEdge(cred, tail, head); |
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360 | |
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361 | // add the prereqs of an intersection to the graph |
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362 | if (tail.is_intersection()) { |
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363 | try { |
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364 | for (Role prereq : tail.prereqs()) |
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365 | g.addVertex(prereq); |
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366 | } catch (ABACException ignored) { } |
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367 | } |
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368 | |
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369 | dirty = true; |
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370 | } |
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371 | |
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372 | /** |
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373 | * Remove a credential from the graph. |
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374 | * @param cred the Credential to remove |
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375 | */ |
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376 | protected void remove_credential(Credential cred) { |
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377 | if (g.containsEdge(cred)) |
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378 | g.removeEdge(cred); |
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379 | dirty = true; |
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380 | } |
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381 | |
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382 | /** |
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383 | * Add a role w/o an edge |
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384 | * @param v the Role to add |
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385 | */ |
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386 | protected void add_vertex(Role v) { |
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387 | if (!g.containsVertex(v)) { |
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388 | g.addVertex(v); |
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389 | dirty = true; |
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390 | } |
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391 | } |
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392 | |
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393 | /** |
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394 | * Remove a role and connected edges. |
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395 | * @param v the Role to remove |
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396 | */ |
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397 | protected void remove_vertex(Role v) { |
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398 | if (g.containsVertex(v)) { |
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399 | g.removeVertex(v); |
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400 | dirty = true; |
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401 | } |
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402 | } |
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403 | |
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404 | /** |
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405 | * Derive the implied edges in the graph, according to RT0 derivation rules. |
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406 | * They are added to this graph. See "Distributed Credential Chain Discovery |
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407 | * in Trust Management" by Ninghui Li et al. for details. Note that a |
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408 | * derived linking edge can imply a new intersection edge and vice versa. |
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409 | * Therefore we iteratively derive edges, giving up when an iteration |
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410 | * produces 0 new edges. |
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411 | */ |
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412 | protected synchronized void derive_implied_edges() { |
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413 | // nothing to do on a clean graph |
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414 | if (!dirty) |
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415 | return; |
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416 | |
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417 | clear_old_edges(); |
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418 | |
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419 | // iteratively derive links. continue as long as new links are added |
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420 | while (derive_links_iter() > 0) |
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421 | ; |
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422 | dirty = false; |
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423 | } |
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424 | |
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425 | /** |
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426 | * Single iteration of deriving implied edges. Returns the number of new |
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427 | * links added. |
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428 | * @return the number of new links added. |
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429 | */ |
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430 | protected int derive_links_iter() { |
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431 | int count = 0; |
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432 | |
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433 | /* for every node in the graph.. */ |
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434 | for (Role vertex : g.getVertices()) { |
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435 | if (vertex.is_intersection()) { |
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436 | // for each prereq edge: |
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437 | // find set of principals that have the prereq |
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438 | // find the intersection of all sets (i.e., principals |
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439 | // that satisfy all prereqs) |
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440 | // for each principal in intersection: |
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441 | // add derived edge |
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442 | |
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443 | Set<Role> principals = null; |
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444 | try { |
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445 | for (Role prereq : vertex.prereqs()) { |
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446 | Set<Role> cur_principals = pq.find_principals(prereq); |
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447 | |
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448 | if (principals == null) |
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449 | principals = cur_principals; |
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450 | else |
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451 | // no, they couldn't just call it "intersection" |
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452 | principals.retainAll(cur_principals); |
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453 | |
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454 | if (principals.size() == 0) |
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455 | break; |
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456 | } |
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457 | } |
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458 | catch (ABACException ignored) { } |
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459 | |
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460 | // add em |
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461 | for (Role principal : principals) |
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462 | if (add_derived_edge(vertex, principal)) |
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463 | ++count; |
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464 | } |
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465 | |
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466 | else if (vertex.is_linking()) { |
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467 | // make the rest of the code a bit clearer |
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468 | Role A_r1_r2 = vertex; |
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469 | |
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470 | Role A_r1 = new Role(A_r1_r2.A_r1()); |
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471 | String r2 = A_r1_r2.r2(); |
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472 | |
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473 | /* locate the node A.r1 */ |
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474 | if (!g.containsVertex(A_r1)) continue; |
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475 | |
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476 | /* for each B that satisfies A_r1 */ |
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477 | for (Role principal : pq.find_principals(A_r1)) { |
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478 | Role B_r2 = new Role(principal + "." + r2); |
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479 | if (!g.containsVertex(B_r2)) continue; |
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480 | |
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481 | if (add_derived_edge(A_r1_r2, B_r2)) |
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482 | ++count; |
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483 | } |
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484 | } |
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485 | } |
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486 | |
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487 | return count; |
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488 | } |
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489 | |
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490 | /** |
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491 | * Add a derived edge in the graph. Returns true only if the edge does not |
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492 | * exist. |
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493 | * @return a boolean, true if an edge has been added |
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494 | */ |
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495 | protected boolean add_derived_edge(Role head, Role tail) { |
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496 | // edge exists: return false |
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497 | if (g.findEdge(tail, head) != null) |
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498 | return false; |
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499 | |
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500 | // add the new edge |
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501 | Credential derived_edge = new InternalCredential(head, tail); |
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502 | derived_edges.add(derived_edge); |
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503 | g.addEdge(derived_edge, tail, head); |
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504 | |
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505 | return true; |
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506 | } |
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507 | |
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508 | /** |
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509 | * Clear the derived edges that currently exist in the graph. This is done |
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510 | * before the edges are rederived. The derived edges in filtered graphs are |
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511 | * also cleared. |
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512 | */ |
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513 | protected void clear_old_edges() { |
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514 | for (Credential i: derived_edges) |
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515 | g.removeEdge(i); |
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516 | derived_edges = new HashSet<Credential>(); |
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517 | } |
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518 | |
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519 | /** |
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520 | * Put the Identity into the set of ids used to validate certificates. |
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521 | * Also put the keyID and name into the translation mappings used by Roles |
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522 | * to pretty print. In the role mapping, if multiple ids use the same |
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523 | * common name they are disambiguated. Only one entry for keyid is |
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524 | * allowed. |
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525 | * @param id the Identity to add |
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526 | */ |
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527 | protected void addIdentity(Identity id) { |
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528 | if (m_identities.contains(id)) |
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529 | return; |
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530 | m_identities.add(id); |
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531 | if (id.getName() != null && id.getKeyID() != null) { |
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532 | if ( !keys.containsKey(id.getKeyID()) ) { |
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533 | String name = id.getName(); |
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534 | int n= 1; |
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535 | |
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536 | while (nicknames.containsKey(name)) { |
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537 | name = id.getName() + n++; |
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538 | } |
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539 | nicknames.put(name, id.getKeyID()); |
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540 | keys.put(id.getKeyID(), name); |
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541 | } |
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542 | } |
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543 | } |
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544 | /** |
---|
545 | * Translate either keys to nicknames or vice versa. Break the string into |
---|
546 | * space separated tokens and then each of them into period separated |
---|
547 | * strings. If any of the smallest strings is in the map, replace it with |
---|
548 | * the value. |
---|
549 | * @param is the string to manipulate |
---|
550 | * @param m the Map containing translations |
---|
551 | * @return the string after modification |
---|
552 | */ |
---|
553 | protected String replace(String is, Map<String, String> m) { |
---|
554 | String rv = ""; |
---|
555 | for (String tok: is.split(" ")) { |
---|
556 | String term = ""; |
---|
557 | for (String s: tok.split("\\.")) { |
---|
558 | String next = m.containsKey(s) ? m.get(s) : s; |
---|
559 | |
---|
560 | if (term.isEmpty()) term = next; |
---|
561 | else term += "." + next; |
---|
562 | } |
---|
563 | if (rv.isEmpty()) rv = term; |
---|
564 | else rv += " " + term; |
---|
565 | } |
---|
566 | return rv; |
---|
567 | } |
---|
568 | |
---|
569 | /** |
---|
570 | * Expand menmonic names in a Role string, e.g. the CN of the issuer |
---|
571 | * certificate, into the full key ID. Used internally by Roles to provide |
---|
572 | * transparent use of mnemonics |
---|
573 | * @param s the string to expand |
---|
574 | * @return the String after expansion. |
---|
575 | */ |
---|
576 | String expandKeyID(String s) { return replace(s, nicknames); } |
---|
577 | /** |
---|
578 | * Convert key IDs to menmonic names in a Role string. The inverse of |
---|
579 | * expandKeyID. |
---|
580 | * @param s the string to expand |
---|
581 | * @return the String after expansion. |
---|
582 | */ |
---|
583 | String expandNickname(String s) { return replace(s, keys); } |
---|
584 | |
---|
585 | /** |
---|
586 | * Read the current ZipEntry's bytes from z. Tedious because there's no |
---|
587 | * way to reliably tell how big the entry is, so we have to rely on a |
---|
588 | * simple expanding array read of the bytes. |
---|
589 | */ |
---|
590 | protected byte[] readCurrentZipEntry(ZipInputStream z) throws IOException { |
---|
591 | final int bsize = 4096; |
---|
592 | byte[] buf = new byte[bsize]; |
---|
593 | byte[] rv = new byte[0]; |
---|
594 | int r = 0; |
---|
595 | |
---|
596 | // z.read returns -1 at the end of entry |
---|
597 | while ((r = z.read(buf, 0, bsize)) != -1 ) { |
---|
598 | byte[] b = new byte[rv.length + r]; |
---|
599 | |
---|
600 | System.arraycopy(rv, 0, b, 0, rv.length); |
---|
601 | System.arraycopy(buf, 0, b, rv.length, r); |
---|
602 | rv = b; |
---|
603 | } |
---|
604 | return rv; |
---|
605 | } |
---|
606 | |
---|
607 | /** |
---|
608 | * Import a zip file. First import all the identities |
---|
609 | * (pem), then the credentials (der) into the credential graph then any |
---|
610 | * alias files into the two maps. If keys is not null, any key pairs in |
---|
611 | * PEM files are put in there. If errors is not null, errors reading files |
---|
612 | * are added indexed by filename. This is a jabac extension. |
---|
613 | * @param s the InputStream to read |
---|
614 | * @param keys a Collection into which to insert unmatched keys |
---|
615 | * @param errors a Map from entry name to generated exception |
---|
616 | * @throws IOException if the file is unreadable. Per entry exceptions are |
---|
617 | * returned in the errors parameter. |
---|
618 | */ |
---|
619 | public void load_zip(InputStream s, Collection<KeyPair> keys, |
---|
620 | Map<String, Exception> errors) throws IOException { |
---|
621 | Map<String, byte[]> derEntries = new HashMap<String, byte[]>(); |
---|
622 | Map<String, Identity> ids = new TreeMap<String, Identity>(); |
---|
623 | Map<String, KeyPair> kps = new TreeMap<String, KeyPair>(); |
---|
624 | int entries = 0; |
---|
625 | |
---|
626 | ZipInputStream z = new ZipInputStream(s); |
---|
627 | |
---|
628 | for (ZipEntry ze = z.getNextEntry(); ze != null; ze = z.getNextEntry()){ |
---|
629 | try { |
---|
630 | entries++; |
---|
631 | byte[] buf = readCurrentZipEntry(z); |
---|
632 | PEMReader r = new PEMReader( |
---|
633 | new InputStreamReader(new ByteArrayInputStream(buf))); |
---|
634 | Object o = readPEM(r); |
---|
635 | |
---|
636 | if ( o != null ) { |
---|
637 | if (o instanceof Identity) { |
---|
638 | Identity i = (Identity) o; |
---|
639 | String kid = i.getKeyID(); |
---|
640 | |
---|
641 | if (kps.containsKey(kid) ) { |
---|
642 | i.setKeyPair(kps.get(kid)); |
---|
643 | kps.remove(kid); |
---|
644 | } |
---|
645 | else if (i.getKeyPair() == null ) |
---|
646 | ids.put(i.getKeyID(), i); |
---|
647 | |
---|
648 | load_id_chunk(i); |
---|
649 | } |
---|
650 | else if (o instanceof KeyPair ) { |
---|
651 | KeyPair kp = (KeyPair) o; |
---|
652 | String kid = extractKeyID(kp.getPublic()); |
---|
653 | |
---|
654 | if (ids.containsKey(kid)) { |
---|
655 | Identity i = ids.get(kid); |
---|
656 | |
---|
657 | i.setKeyPair(kp); |
---|
658 | ids.remove(kid); |
---|
659 | } |
---|
660 | else { |
---|
661 | kps.put(kid, kp); |
---|
662 | } |
---|
663 | } |
---|
664 | } |
---|
665 | else { |
---|
666 | // Not a PEM file |
---|
667 | derEntries.put(ze.getName(),buf); |
---|
668 | continue; |
---|
669 | } |
---|
670 | } |
---|
671 | catch (Exception e ) { |
---|
672 | if (errors != null ) errors.put(ze.getName(), e); |
---|
673 | } |
---|
674 | } |
---|
675 | |
---|
676 | for ( String k: derEntries.keySet() ) { |
---|
677 | try { |
---|
678 | Credential[] creds = credentialFactory.parseCredential( |
---|
679 | new ByteArrayInputStream(derEntries.get(k)), |
---|
680 | m_identities); |
---|
681 | for (Credential c: creds) |
---|
682 | add_credential(c); |
---|
683 | } |
---|
684 | catch (Exception e ) { |
---|
685 | if (errors != null ) errors.put(k, e); |
---|
686 | } |
---|
687 | } |
---|
688 | |
---|
689 | if (entries == 0) |
---|
690 | throw new IOException("Not a ZIP file (or empty ZIP file)"); |
---|
691 | } |
---|
692 | /** |
---|
693 | * Equivalent to load_zip(s, null, null). |
---|
694 | * @param s the InputStream to read |
---|
695 | * @throws IOException if the file is unreadable. To see per-entry |
---|
696 | * exceptions use a signature with the errors parameter |
---|
697 | */ |
---|
698 | public void load_zip(InputStream s) |
---|
699 | throws IOException { |
---|
700 | load_zip(s, null, null); |
---|
701 | } |
---|
702 | /** |
---|
703 | * Equivalent to load_zip(s, null, errors). |
---|
704 | * @param s the InputStream to read |
---|
705 | * @param errors a Map from entry name to generated exception |
---|
706 | * @throws IOException if the file is unreadable. Per entry exceptions are |
---|
707 | * returned in the errors parameter. |
---|
708 | */ |
---|
709 | public void load_zip(InputStream s, |
---|
710 | Map<String, Exception> errors) throws IOException { |
---|
711 | load_zip(s, null, errors); |
---|
712 | } |
---|
713 | /** |
---|
714 | * Equivalent to load_zip(s, keys, null). |
---|
715 | * @param s the InputStream to read |
---|
716 | * @param keys a Collection into which to insert unmatched keys |
---|
717 | * @throws IOException if the file is unreadable. To see per-entry |
---|
718 | * exceptions use a signature with the errors parameter |
---|
719 | */ |
---|
720 | public void load_zip(InputStream s, |
---|
721 | Collection<KeyPair> keys) throws IOException { |
---|
722 | load_zip(s, keys, null); |
---|
723 | } |
---|
724 | |
---|
725 | /** |
---|
726 | * Loads a zip file. Equivalent to |
---|
727 | * load_zip(new FileInputStream(zf), keys, errors). |
---|
728 | * @param zf the File to read |
---|
729 | * @param keys a Collection into which to insert unmatched keys |
---|
730 | * @param errors a Map from entry name to generated exception |
---|
731 | * @throws IOException if the file is unreadable. Per entry exceptions are |
---|
732 | * returned in the errors parameter. |
---|
733 | */ |
---|
734 | public void load_zip(File zf, Collection<KeyPair> keys, |
---|
735 | Map<String, Exception> errors) throws IOException { |
---|
736 | load_zip(new FileInputStream(zf), keys, errors); |
---|
737 | } |
---|
738 | /** |
---|
739 | * Equivalent to load_zip(d, null, null). |
---|
740 | * @param d the File to read |
---|
741 | * @throws IOException if the file is unreadable. To see per-entry |
---|
742 | * exceptions use a signature with the errors parameter |
---|
743 | */ |
---|
744 | public void load_zip(File d) |
---|
745 | throws IOException { |
---|
746 | load_zip(d, null, null); |
---|
747 | } |
---|
748 | /** |
---|
749 | * Equivalent to load_zip(d, null, errors). |
---|
750 | * @param d the File to read |
---|
751 | * @param errors a Map from entry name to generated exception |
---|
752 | * @throws IOException if the file is unreadable. Per entry exceptions are |
---|
753 | * returned in the errors parameter. |
---|
754 | */ |
---|
755 | public void load_zip(File d, |
---|
756 | Map<String, Exception> errors) throws IOException { |
---|
757 | load_zip(d, null, errors); |
---|
758 | } |
---|
759 | /** |
---|
760 | * Equivalent to load_zip(d, keys, null). |
---|
761 | * @param d the File to read |
---|
762 | * @param keys a Collection into which to insert unmatched keys |
---|
763 | * @throws IOException if the file is unreadable. To see per-entry |
---|
764 | * exceptions use a signature with the errors parameter |
---|
765 | */ |
---|
766 | public void load_zip(File d, |
---|
767 | Collection<KeyPair> keys) throws IOException { |
---|
768 | load_zip(d, keys, null); |
---|
769 | } |
---|
770 | |
---|
771 | /** |
---|
772 | * Read a PEM file that contains an X509 Certificate, a key pair, or both. |
---|
773 | * If a cert is present it is converted into an Identity. A key pair is |
---|
774 | * returned as a java.security.KeyPair and both are returned as an Identity |
---|
775 | * with an associated key pair. |
---|
776 | * @param r a PEMReader from which to read |
---|
777 | * @return an object encoding the contents (as above) |
---|
778 | * @throws IOException for an unreadable or badly formated input |
---|
779 | */ |
---|
780 | protected Object readPEM(PEMReader r) throws IOException { |
---|
781 | Identity i = null; |
---|
782 | KeyPair keys = null; |
---|
783 | Object o = null; |
---|
784 | |
---|
785 | while ( (o = r.readObject()) != null ) { |
---|
786 | if (o instanceof X509Certificate) { |
---|
787 | if ( i == null ) { |
---|
788 | try { |
---|
789 | i = new Identity((X509Certificate)o); |
---|
790 | } |
---|
791 | catch (Exception e) { |
---|
792 | // Translate Idenitiy exceptions to IOException |
---|
793 | throw new IOException(e); |
---|
794 | } |
---|
795 | if (keys != null ) { |
---|
796 | i.setKeyPair(keys); |
---|
797 | keys = null; |
---|
798 | } |
---|
799 | } |
---|
800 | else throw new IOException("Two certificates"); |
---|
801 | } |
---|
802 | else if (o instanceof KeyPair ) { |
---|
803 | if ( i != null ) i.setKeyPair((KeyPair) o); |
---|
804 | else keys = (KeyPair) o; |
---|
805 | } |
---|
806 | else { |
---|
807 | throw new IOException("Unexpected PEM object: " + |
---|
808 | o.getClass().getName()); |
---|
809 | } |
---|
810 | } |
---|
811 | |
---|
812 | if ( i != null ) return i; |
---|
813 | else if ( keys != null) return keys; |
---|
814 | else return null; |
---|
815 | } |
---|
816 | |
---|
817 | /** |
---|
818 | * Import a directory full of files. First import all the identities |
---|
819 | * (pem), then the credentials (der) into the credential graph then any |
---|
820 | * alias files into the two maps. If keys is not null, any key pairs in |
---|
821 | * PEM files are put in there. If errors is not null, errors reading files |
---|
822 | * are added indexed by filename. This behaves slightly differently from |
---|
823 | * the load_directory description in the general libabac documentation. |
---|
824 | * @param d the File to read. If it is a directory its contents are read |
---|
825 | * @param keys a Collection into which to insert unmatched keys |
---|
826 | * @param errors a Map from entry name to generated exception |
---|
827 | * @throws IOException if the file is unreadable. Per file exceptions are |
---|
828 | * returned in the errors parameter. |
---|
829 | */ |
---|
830 | public void load_directory(File d, Collection<KeyPair> keys, |
---|
831 | Map<String, Exception> errors) { |
---|
832 | Vector<File> derFiles = new Vector<File>(); |
---|
833 | Collection<File> files = new Vector<File>(); |
---|
834 | Map<String, Identity> ids = new TreeMap<String, Identity>(); |
---|
835 | Map<String, KeyPair> kps = new TreeMap<String, KeyPair>(); |
---|
836 | |
---|
837 | if (d.isDirectory() ) |
---|
838 | for (File f : d.listFiles()) |
---|
839 | files.add(f); |
---|
840 | else files.add(d); |
---|
841 | |
---|
842 | for (File f: files ) { |
---|
843 | try { |
---|
844 | PEMReader r = new PEMReader(new FileReader(f)); |
---|
845 | Object o = readPEM(r); |
---|
846 | |
---|
847 | if ( o != null ) { |
---|
848 | if (o instanceof Identity) { |
---|
849 | Identity i = (Identity) o; |
---|
850 | String kid = i.getKeyID(); |
---|
851 | |
---|
852 | if (kps.containsKey(kid) ) { |
---|
853 | i.setKeyPair(kps.get(kid)); |
---|
854 | kps.remove(kid); |
---|
855 | } |
---|
856 | else if (i.getKeyPair() == null ) |
---|
857 | ids.put(i.getKeyID(), i); |
---|
858 | |
---|
859 | load_id_chunk(i); |
---|
860 | } |
---|
861 | else if (o instanceof KeyPair ) { |
---|
862 | KeyPair kp = (KeyPair) o; |
---|
863 | String kid = extractKeyID(kp.getPublic()); |
---|
864 | |
---|
865 | if (ids.containsKey(kid)) { |
---|
866 | Identity i = ids.get(kid); |
---|
867 | |
---|
868 | i.setKeyPair(kp); |
---|
869 | ids.remove(kid); |
---|
870 | } |
---|
871 | else { |
---|
872 | kps.put(kid, kp); |
---|
873 | } |
---|
874 | } |
---|
875 | } |
---|
876 | else { |
---|
877 | // Not a PEM file |
---|
878 | derFiles.add(f); |
---|
879 | continue; |
---|
880 | } |
---|
881 | } |
---|
882 | catch (Exception e ) { |
---|
883 | if (errors != null ) errors.put(f.getName(), e); |
---|
884 | } |
---|
885 | } |
---|
886 | |
---|
887 | for ( File f : derFiles ) { |
---|
888 | try { |
---|
889 | Credential[] creds = credentialFactory.parseCredential(f, |
---|
890 | m_identities); |
---|
891 | for (Credential c: creds) |
---|
892 | add_credential(c); |
---|
893 | } |
---|
894 | catch (Exception e ) { |
---|
895 | if (errors != null ) errors.put(f.getName(), e); |
---|
896 | } |
---|
897 | } |
---|
898 | } |
---|
899 | /** |
---|
900 | * Equivalent to load_directory(d, null, null). |
---|
901 | * @param d the File to read. If it is a directory its contents are read |
---|
902 | * @throws IOException if the file is unreadable. To see per-file |
---|
903 | * exceptions use a signature with the errors parameter. |
---|
904 | */ |
---|
905 | public void load_directory(File d) { |
---|
906 | load_directory(d, null, null); |
---|
907 | } |
---|
908 | /** |
---|
909 | * Equivalent to load_directory(d, null, null). |
---|
910 | * @param d the File to read. If it is a directory its contents are read |
---|
911 | * @param errors a Map from entry name to generated exception |
---|
912 | * @throws IOException if the file is unreadable. Per file exceptions are |
---|
913 | * returned in the errors parameter. |
---|
914 | */ |
---|
915 | public void load_directory(File d, Map<String, Exception> errors) { |
---|
916 | load_directory(d, null, errors); |
---|
917 | } |
---|
918 | /** |
---|
919 | * Equivalent to load_directory(d, null, null). |
---|
920 | * @param d the File to read. If it is a directory its contents are read |
---|
921 | * @param keys a Collection into which to insert unmatched keys |
---|
922 | * @throws IOException if the file is unreadable. To see per-file |
---|
923 | * exceptions use a signature with the errors parameter. |
---|
924 | */ |
---|
925 | public void load_directory(File d, Collection<KeyPair> keys) { |
---|
926 | load_directory(d, keys, null); |
---|
927 | } |
---|
928 | |
---|
929 | /** |
---|
930 | * Load from a simple rt0 text format. A jabac extension. The format is |
---|
931 | * <br/> |
---|
932 | * # comments<br/> |
---|
933 | * role <- role<br/> |
---|
934 | * <br/> |
---|
935 | * |
---|
936 | * Spaces are not significant around the arrow and the tail can be as long |
---|
937 | * as needed. |
---|
938 | * @param s the InputStream to load |
---|
939 | * @throws IOException if there is an error getting the file open or in |
---|
940 | * format |
---|
941 | */ |
---|
942 | public void load_rt0(InputStream s) |
---|
943 | throws IOException { |
---|
944 | Pattern comment = Pattern.compile("(^\\s*#|^\\s*$)"); |
---|
945 | Pattern rule = Pattern.compile("([\\w\\.]+)\\s*<-+\\s*(.+)"); |
---|
946 | LineNumberReader r = new LineNumberReader(new InputStreamReader(s)); |
---|
947 | String line = null; |
---|
948 | |
---|
949 | while ((line = r.readLine()) != null) { |
---|
950 | Matcher cm = comment.matcher(line); |
---|
951 | Matcher rm = rule.matcher(line); |
---|
952 | |
---|
953 | if (cm.find()) continue; |
---|
954 | if (rm.find()) |
---|
955 | add_credential(new InternalCredential(new Role(rm.group(1)), |
---|
956 | new Role(rm.group(2)))); |
---|
957 | else |
---|
958 | throw new IOException("Unexpected format: line " + |
---|
959 | r.getLineNumber()); |
---|
960 | } |
---|
961 | } |
---|
962 | /** |
---|
963 | * Equivalent to load_rt0(new FileInputStream(f) |
---|
964 | * @param f the File to load |
---|
965 | * @throws IOException if there is an error getting the file open |
---|
966 | */ |
---|
967 | public void load_rt0(File f) throws IOException { |
---|
968 | load_rt0(new FileInputStream(f)); |
---|
969 | } |
---|
970 | |
---|
971 | |
---|
972 | /** |
---|
973 | * Write the certificates that make up the context as a zip file, with an |
---|
974 | * entry for each credential or identity. The files are all zipped in a |
---|
975 | * directory derived from the filename. |
---|
976 | * @param s the OutputStream to write |
---|
977 | * @param allIDs a boolean, if true write certificates for all Identities, |
---|
978 | * whether used in signing a credential or not. |
---|
979 | * @param withPrivateKeys a boolean, if true write the Identities as PEM |
---|
980 | * file containing both the certificate and the private keys. |
---|
981 | * @throws IOException if there is a problem writing the file. |
---|
982 | */ |
---|
983 | public void write_zip(OutputStream s, boolean allIDs, |
---|
984 | boolean withPrivateKeys) throws IOException { |
---|
985 | ZipOutputStream z = new ZipOutputStream(s); |
---|
986 | Set<Identity> ids = allIDs ? m_identities : new TreeSet<Identity>(); |
---|
987 | String baseDir = "creds"; |
---|
988 | int idx = baseDir.indexOf('.'); |
---|
989 | |
---|
990 | |
---|
991 | if (idx != -1) |
---|
992 | baseDir = baseDir.substring(0, idx); |
---|
993 | |
---|
994 | int n = 0; |
---|
995 | for (Credential c: credentials()) { |
---|
996 | z.putNextEntry(new ZipEntry(baseDir + File.separator + |
---|
997 | "attr" + n++ + c.getSuffix())); |
---|
998 | c.write(z); |
---|
999 | z.closeEntry(); |
---|
1000 | if ( c.issuer() != null && !allIDs) ids.add(c.issuer()); |
---|
1001 | } |
---|
1002 | for (Identity i: ids) { |
---|
1003 | z.putNextEntry(new ZipEntry(baseDir + File.separator + |
---|
1004 | i.getName() + ".pem")); |
---|
1005 | i.write(z); |
---|
1006 | if (withPrivateKeys) |
---|
1007 | i.writePrivateKey(z); |
---|
1008 | z.closeEntry(); |
---|
1009 | } |
---|
1010 | z.close(); |
---|
1011 | } |
---|
1012 | /** |
---|
1013 | * Equivalent to |
---|
1014 | * write_zip(new FileOutputStream(f), allIDs, withPrivateKeys). |
---|
1015 | * @param f the File to write |
---|
1016 | * @param allIDs a boolean, if true write certificates for all Identities, |
---|
1017 | * whether used in signing a credential or not. |
---|
1018 | * @param withPrivateKeys a boolean, if true write the Identities as PEM |
---|
1019 | * file containing both the certificate and the private keys. |
---|
1020 | * @throws IOException if there is a problem writing the file. |
---|
1021 | */ |
---|
1022 | public void write_zip(File f, boolean allIDs, boolean withPrivateKeys) |
---|
1023 | throws IOException { |
---|
1024 | write_zip(new FileOutputStream(f), allIDs, withPrivateKeys); |
---|
1025 | } |
---|
1026 | |
---|
1027 | /** |
---|
1028 | * Write to a simple rt0 text format. A jabac extension. |
---|
1029 | * The format is |
---|
1030 | * <br/> |
---|
1031 | * role <- role<br/> |
---|
1032 | * <br/> |
---|
1033 | * |
---|
1034 | * @param w a Writer to print on |
---|
1035 | * @param useKeyIDs a boolean, true to print key IDs not mnemonics |
---|
1036 | */ |
---|
1037 | public void write_rt0(Writer w, boolean useKeyIDs) { |
---|
1038 | PrintWriter pw = w instanceof PrintWriter ? |
---|
1039 | (PrintWriter) w : new PrintWriter(w); |
---|
1040 | |
---|
1041 | for (Credential c: credentials()) |
---|
1042 | pw.println(useKeyIDs ? c.toString() : c.simpleString(this)); |
---|
1043 | pw.flush(); |
---|
1044 | } |
---|
1045 | |
---|
1046 | /** |
---|
1047 | * Call write_rt0 on a FileWriter derived from f. |
---|
1048 | * @param f the File to write to |
---|
1049 | * @param useKeyIDs a boolean, true to print key IDs not mnemonics |
---|
1050 | * @throws IOException if there is a problem writing the file. |
---|
1051 | */ |
---|
1052 | public void write_rt0(File f, boolean useKeyIDs) throws IOException { |
---|
1053 | write_rt0(new FileWriter(f), useKeyIDs); |
---|
1054 | } |
---|
1055 | |
---|
1056 | /** |
---|
1057 | * Equivalent to write_rt0(w, false); |
---|
1058 | * @param w a Writer to print on |
---|
1059 | */ |
---|
1060 | public void write_rt0(Writer w) { write_rt0(w, false); } |
---|
1061 | |
---|
1062 | /** |
---|
1063 | * Equivalent to write_rt0(f, false); |
---|
1064 | * @param f the File to write to |
---|
1065 | * @throws IOException if there is a problem writing the file. |
---|
1066 | */ |
---|
1067 | public void write_rt0(File f) throws IOException { |
---|
1068 | write_rt0(new FileWriter(f), false); |
---|
1069 | } |
---|
1070 | |
---|
1071 | /** |
---|
1072 | * Return this Context's CredentialFactory. |
---|
1073 | * @return this Context's CredentialFactory. |
---|
1074 | */ |
---|
1075 | public CredentialFactory getCredentialFactory() { |
---|
1076 | return credentialFactory; |
---|
1077 | } |
---|
1078 | |
---|
1079 | /** |
---|
1080 | * Set this Context's CredentialFactory. |
---|
1081 | * @param cf the new CredentialFactoty |
---|
1082 | */ |
---|
1083 | public void setCredentialFactory(CredentialFactory cf) { |
---|
1084 | credentialFactory = cf; |
---|
1085 | } |
---|
1086 | |
---|
1087 | /** |
---|
1088 | * Return a new credential supported by this Context. It is not inserted |
---|
1089 | * in the Context. |
---|
1090 | * @param head a Role, the head of the encoded ABAC statement |
---|
1091 | * @param tail a Role, the tail of the decoded ABAC statement |
---|
1092 | * @return a Credential encoding that ABAC statement |
---|
1093 | */ |
---|
1094 | public Credential newCredential(Role head, Role tail) { |
---|
1095 | return credentialFactory.generateCredential(head, tail); |
---|
1096 | } |
---|
1097 | |
---|
1098 | /** |
---|
1099 | * Get to the SHA1 hash of the key. Used by Roles and Identities to get a |
---|
1100 | * key ID. |
---|
1101 | * @param k the PublicKey to get the ID from. |
---|
1102 | * @return a String with the key identifier |
---|
1103 | */ |
---|
1104 | static String extractKeyID(PublicKey k) { |
---|
1105 | SubjectPublicKeyInfo ki = extractSubjectPublicKeyInfo(k); |
---|
1106 | SubjectKeyIdentifier id = |
---|
1107 | SubjectKeyIdentifier.createSHA1KeyIdentifier(ki); |
---|
1108 | |
---|
1109 | // Now format it into a string for keeps |
---|
1110 | Formatter fmt = new Formatter(new StringWriter()); |
---|
1111 | for (byte b: id.getKeyIdentifier()) |
---|
1112 | fmt.format("%02x", b); |
---|
1113 | return fmt.out().toString(); |
---|
1114 | } |
---|
1115 | |
---|
1116 | /** |
---|
1117 | * Extratct the SubjectPublicKeyInfo. Useful for some other encryptions, |
---|
1118 | * notably Certificate.make_cert(). |
---|
1119 | * @param k the PublicKey to get the ID from. |
---|
1120 | * @return a String with the key identifier |
---|
1121 | */ |
---|
1122 | static SubjectPublicKeyInfo extractSubjectPublicKeyInfo( |
---|
1123 | PublicKey k) { |
---|
1124 | ASN1Sequence seq = null; |
---|
1125 | try { |
---|
1126 | seq = (ASN1Sequence) new ASN1InputStream( |
---|
1127 | k.getEncoded()).readObject(); |
---|
1128 | } |
---|
1129 | catch (IOException ie) { |
---|
1130 | // Badly formatted key?? |
---|
1131 | return null; |
---|
1132 | } |
---|
1133 | return new SubjectPublicKeyInfo(seq); |
---|
1134 | } |
---|
1135 | |
---|
1136 | } |
---|