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16 package org.apache.cocoon.components.modules.input;
17
18 import org.apache.avalon.framework.configuration.Configuration;
19 import org.apache.avalon.framework.configuration.ConfigurationException;
20 import org.apache.avalon.framework.thread.ThreadSafe;
21
22 import org.apache.cocoon.util.HashMap;
23
24 import java.net.URLEncoder  ;
25 import java.security.MessageDigest ;
26 import java.security.NoSuchAlgorithmException ;
27 import java.security.NoSuchProviderException ;
28 import java.util.Iterator ;
29 import java.util.Map ;
30 import java.io.UnsupportedEncodingException ;
31
32
45 public class DigestMetaModule extends AbstractMetaModule implements ThreadSafe {
46
47 private String defaultAlgorithm = "SHA";
48 private String defaultProvider = null;
49 private String defaultSalt = "salt";
50 private String defaultEncode = "false";
51
52
53 static final int ENCODING_NONE = 0;
54
55 static final int ENCODING_STR = 1;
56
57 static final int ENCODING_URL = 2;
58
59 static final int ENCODING_HEX = 3;
60
61 private static final HashMap encodingNames;
62
63 static {
64 HashMap names = new HashMap();
65 names.put("false", new Integer (ENCODING_NONE));
66 names.put("no", new Integer (ENCODING_NONE));
67 names.put("none", new Integer (ENCODING_NONE));
68 names.put("string", new Integer (ENCODING_STR));
69 names.put("yes", new Integer (ENCODING_URL));
70 names.put("true", new Integer (ENCODING_URL));
71 names.put("hex", new Integer (ENCODING_HEX));
72 encodingNames = names;
73 names = null;
74 }
75
76
77 public void configure(Configuration config) throws ConfigurationException {
78
79 this.inputConf = config.getChild("input-module");
80 this.defaultInput = this.inputConf.getAttribute("name", this.defaultInput);
81
82 this.defaultAlgorithm = this.inputConf.getAttribute("algorithm",this.defaultAlgorithm);
83 this.defaultProvider = this.inputConf.getAttribute("provider",this.defaultProvider);
84 this.defaultSalt = this.inputConf.getAttribute("salt",this.defaultSalt);
85 this.defaultEncode = this.inputConf.getAttribute("encode","false");
86
87 this.defaultAlgorithm = config.getChild("algorithm").getValue(this.defaultAlgorithm);
89 this.defaultProvider = config.getChild("provider").getValue(this.defaultProvider);
90 this.defaultSalt = config.getChild("salt").getValue(this.defaultSalt);
91 this.defaultEncode = config.getChild("encode").getValue(this.defaultEncode);
92
93 if (encodingNames.get(this.defaultEncode) == null) {
94 if (getLogger().isErrorEnabled())
95 getLogger().error("Requested encoding is unknown: "+this.defaultEncode);
96 this.defaultEncode="false";
97 }
98 }
99
100
101 public Object getAttribute( String name, Configuration modeConf, Map objectModel )
102 throws ConfigurationException {
103
104 if (!this.initialized) {
105 this.lazy_initialize();
106 }
107 if (this.defaultInput == null) {
108 if (getLogger().isWarnEnabled())
109 getLogger().warn("No input module given. FAILING");
110 return null;
111 }
112
113 Configuration inputConfig = null;
116 String inputName=null;
117 String algorithm = this.defaultAlgorithm;
118 String provider = this.defaultProvider;
119 String salt = this.defaultSalt;
120 int encode = ((Integer ) encodingNames.get(this.defaultEncode)).intValue();
121 if (modeConf!=null) {
122 inputName = modeConf.getChild("input-module").getAttribute("name",null);
123 if (inputName != null) {
124 inputConfig = modeConf.getChild("input-module");
125 }
126 algorithm = modeConf.getAttribute("algorithm", algorithm);
128 provider = modeConf.getAttribute("provider", provider);
129 salt = modeConf.getAttribute("salt", salt);
130 encode = ((Integer ) encodingNames.get(modeConf.getAttribute("encode", this.defaultEncode))).intValue();
131
132 algorithm = modeConf.getChild("algorithm").getValue(algorithm);
134 provider = modeConf.getChild("provider").getValue(provider);
135 salt = modeConf.getChild("salt").getValue(salt);
136 encode = ((Integer ) encodingNames.get(modeConf.getChild("encode").getValue(this.defaultEncode))).intValue();
137 }
138
139
140 Object value = getValue(name, objectModel,
141 this.input, this.defaultInput, this.inputConf,
142 null, inputName, inputConfig);
143
144 if (value != null)
145 try {
146 MessageDigest md = (provider==null ? MessageDigest.getInstance(algorithm) :
147 MessageDigest.getInstance(algorithm,provider));
148
149 md.update((salt+(value instanceof String ? (String )value : value.toString())).getBytes());
150 return encodeByteArray(md.digest(),encode);
151
152 } catch (NoSuchAlgorithmException nsae) {
153 if (getLogger().isWarnEnabled())
154 getLogger().warn("A problem occurred acquiring digest algorithm '" + algorithm
155 + (provider==null?"":"' from '"+provider) +"': " + nsae.getMessage());
156 } catch (NoSuchProviderException nspe) {
157 if (getLogger().isWarnEnabled())
158 getLogger().warn("A problem occurred acquiring digest algorithm '" + algorithm
159 + (provider==null?"":"' from '"+provider) +"': " + nspe.getMessage());
160 }
161
162 return null;
163 }
164
165
166 public Iterator getAttributeNames( Configuration modeConf, Map objectModel )
167 throws ConfigurationException {
168
169 if (!this.initialized) {
170 this.lazy_initialize();
171 }
172 if (this.defaultInput == null) {
173 if (getLogger().isWarnEnabled())
174 getLogger().warn("No input module given. FAILING");
175 return null;
176 }
177
178 Configuration inputConfig = null;
181 String inputName=null;
182 if (modeConf!=null) {
183 inputName = modeConf.getChild("input-module").getAttribute("name",null);
184 if (inputName != null) {
185 inputConfig = modeConf.getChild("input-module");
186 }
187 }
188
189 Iterator names = getNames(objectModel,
190 this.input, this.defaultInput, this.inputConf,
191 null, inputName, inputConfig);
192
193 return names;
194
195 }
196
197
198 public Object [] getAttributeValues( String name, Configuration modeConf, Map objectModel )
199 throws ConfigurationException {
200
201 if (!this.initialized) {
202 this.lazy_initialize();
203 }
204 if (this.defaultInput == null) {
205 if (getLogger().isWarnEnabled())
206 getLogger().warn("No input module given. FAILING");
207 return null;
208 }
209
210 Configuration inputConfig = null;
213 String inputName=null;
214 String algorithm = this.defaultAlgorithm;
215 String provider = this.defaultProvider;
216 String salt = this.defaultSalt;
217 int encode = ((Integer ) encodingNames.get(this.defaultEncode)).intValue();
218 if (modeConf!=null) {
219 inputName = modeConf.getChild("input-module").getAttribute("name",null);
220 if (inputName != null) {
221 inputConfig = modeConf.getChild("input-module");
222 }
223 algorithm = modeConf.getAttribute("algorithm", algorithm);
225 provider = modeConf.getAttribute("provider" , provider );
226 salt = modeConf.getAttribute("salt" , salt );
227 encode = ((Integer ) encodingNames.get(modeConf.getAttribute("encode" , this.defaultEncode))).intValue();
228
229 algorithm = modeConf.getChild("algorithm").getValue(algorithm);
231 provider = modeConf.getChild("provider").getValue(provider);
232 salt = modeConf.getChild("salt").getValue(salt);
233 encode = ((Integer ) encodingNames.get(modeConf.getChild("encode").getValue(this.defaultEncode))).intValue();
234 }
235
236 Object [] values = getValues(name, objectModel,
237 this.input, this.defaultInput, this.inputConf,
238 null, inputName, inputConfig);
239 Object [] result = null;
240
241 if (values != null) {
242 try {
243 MessageDigest md = (provider==null ? MessageDigest.getInstance(algorithm) :
244 MessageDigest.getInstance(algorithm,provider));
245
246 result = new Object [values.length];
247 for (int i=0; i<values.length; i++) {
248 md.update((salt + (values[i] instanceof String ? (String )values[i] :
249 values[i].toString())).getBytes());
250 result[i] = encodeByteArray(md.digest(), encode);
251 }
252 return result;
253 } catch (NoSuchAlgorithmException nsae) {
254 if (getLogger().isWarnEnabled())
255 getLogger().warn("A problem occurred acquiring digest algorithm '" + algorithm
256 + (provider==null?"":"' from '"+provider) +"': " + nsae.getMessage());
257 } catch (NoSuchProviderException nspe) {
258 if (getLogger().isWarnEnabled())
259 getLogger().warn("A problem occurred acquiring digest algorithm '" + algorithm
260 + (provider==null?"":"' from '"+provider) +"': " + nspe.getMessage());
261 }
262 }
263 return result;
264 }
265
266
267
273 Object encodeByteArray(byte[] b, int encode) {
274 Object result = null;
275 switch(encode) {
276 case ENCODING_HEX:
277 result = byte2Hex(b);
278 break;
279 case ENCODING_STR:
280 try {
281 result = new String (b, "UTF-8");
282 } catch (UnsupportedEncodingException uee) {
283 if (getLogger().isErrorEnabled())
284 getLogger().error("UTF-8 not supported -- cannot convert message digest to String.");
285 }
286 break;
287 case ENCODING_URL:
288 try {
289 String str = new String (b, "UTF-8");
290 result = URLEncoder.encode(str);
291 } catch (UnsupportedEncodingException uee) {
292 if (getLogger().isErrorEnabled())
293 getLogger().error("UTF-8 not supported -- cannot convert message digest to String.");
294 }
295 break;
296 case ENCODING_NONE:
297 break;
299 default:
300 }
302 return result;
303 }
304
305
311 static String byte2Hex ( byte[] b ) {
312 StringBuffer sb = new StringBuffer ( b.length * 2 );
313 for ( int i=0 ; i < b.length ; i++ ) {
314 sb.append( hexChar [ ( b[i] & 0xf0 ) >>> 4 ] ) ;
315 sb.append( hexChar [ ( b[i] & 0x0f ) ] ) ;
316 }
317 return sb.toString() ;
318 }
319
320
321
324 static char[] hexChar = {
325 '0' , '1' , '2' , '3' ,
326 '4' , '5' , '6' , '7' ,
327 '8' , '9' , 'a' , 'b' ,
328 'c' , 'd' , 'e' , 'f'
329 };
330
331 }
332 |
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