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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/sun/security/provider/JavaKeyStore.java (1 of 18352 files). Show all

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java/pkg/sun/security/provider/JavaKeyStore.java+802−0
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1+/*
2+ * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+
26+package sun.security.provider;
27+
28+import java.io.*;
29+import java.security.*;
30+import java.security.cert.Certificate;
31+import java.security.cert.CertificateFactory;
32+import java.security.cert.CertificateException;
33+import java.util.*;
34+import sun.misc.IOUtils;
35+
36+import sun.security.pkcs.EncryptedPrivateKeyInfo;
37+
38+/**
39+ * This class provides the keystore implementation referred to as "JKS".
40+ *
41+ * @author Jan Luehe
42+ * @author David Brownell
43+ *
44+ *
45+ * @see KeyProtector
46+ * @see java.security.KeyStoreSpi
47+ * @see KeyTool
48+ *
49+ * @since 1.2
50+ */
51+
52+abstract class JavaKeyStore extends KeyStoreSpi {
53+
54+ // regular JKS
55+ public static final class JKS extends JavaKeyStore {
56+ String convertAlias(String alias) {
57+ return alias.toLowerCase();
58+ }
59+ }
60+
61+ // special JKS that uses case sensitive aliases
62+ public static final class CaseExactJKS extends JavaKeyStore {
63+ String convertAlias(String alias) {
64+ return alias;
65+ }
66+ }
67+
68+ private static final int MAGIC = 0xfeedfeed;
69+ private static final int VERSION_1 = 0x01;
70+ private static final int VERSION_2 = 0x02;
71+
72+ // Private keys and their supporting certificate chains
73+ private static class KeyEntry {
74+ Date date; // the creation date of this entry
75+ byte[] protectedPrivKey;
76+ Certificate chain[];
77+ };
78+
79+ // Trusted certificates
80+ private static class TrustedCertEntry {
81+ Date date; // the creation date of this entry
82+ Certificate cert;
83+ };
84+
85+ /**
86+ * Private keys and certificates are stored in a hashtable.
87+ * Hash entries are keyed by alias names.
88+ */
89+ private final Hashtable<String, Object> entries;
90+
91+ JavaKeyStore() {
92+ entries = new Hashtable<String, Object>();
93+ }
94+
95+ // convert an alias to internal form, overridden in subclasses:
96+ // lower case for regular JKS
97+ // original string for CaseExactJKS
98+ abstract String convertAlias(String alias);
99+
100+ /**
101+ * Returns the key associated with the given alias, using the given
102+ * password to recover it.
103+ *
104+ * @param alias the alias name
105+ * @param password the password for recovering the key
106+ *
107+ * @return the requested key, or null if the given alias does not exist
108+ * or does not identify a <i>key entry</i>.
109+ *
110+ * @exception NoSuchAlgorithmException if the algorithm for recovering the
111+ * key cannot be found
112+ * @exception UnrecoverableKeyException if the key cannot be recovered
113+ * (e.g., the given password is wrong).
114+ */
115+ public Key engineGetKey(String alias, char[] password)
116+ throws NoSuchAlgorithmException, UnrecoverableKeyException
117+ {
118+ Object entry = entries.get(convertAlias(alias));
119+
120+ if (entry == null || !(entry instanceof KeyEntry)) {
121+ return null;
122+ }
123+ if (password == null) {
124+ throw new UnrecoverableKeyException("Password must not be null");
125+ }
126+
127+ KeyProtector keyProtector = new KeyProtector(password);
128+ byte[] encrBytes = ((KeyEntry)entry).protectedPrivKey;
129+ EncryptedPrivateKeyInfo encrInfo;
130+ byte[] plain;
131+ try {
132+ encrInfo = new EncryptedPrivateKeyInfo(encrBytes);
133+ } catch (IOException ioe) {
134+ throw new UnrecoverableKeyException("Private key not stored as "
135+ + "PKCS #8 "
136+ + "EncryptedPrivateKeyInfo");
137+ }
138+ return keyProtector.recover(encrInfo);
139+ }
140+
141+ /**
142+ * Returns the certificate chain associated with the given alias.
143+ *
144+ * @param alias the alias name
145+ *
146+ * @return the certificate chain (ordered with the user's certificate first
147+ * and the root certificate authority last), or null if the given alias
148+ * does not exist or does not contain a certificate chain (i.e., the given
149+ * alias identifies either a <i>trusted certificate entry</i> or a
150+ * <i>key entry</i> without a certificate chain).
151+ */
152+ public Certificate[] engineGetCertificateChain(String alias) {
153+ Object entry = entries.get(convertAlias(alias));
154+
155+ if (entry != null && entry instanceof KeyEntry) {
156+ if (((KeyEntry)entry).chain == null) {
157+ return null;
158+ } else {
159+ return ((KeyEntry)entry).chain.clone();
160+ }
161+ } else {
162+ return null;
163+ }
164+ }
165+
166+ /**
167+ * Returns the certificate associated with the given alias.
168+ *
169+ * <p>If the given alias name identifies a
170+ * <i>trusted certificate entry</i>, the certificate associated with that
171+ * entry is returned. If the given alias name identifies a
172+ * <i>key entry</i>, the first element of the certificate chain of that
173+ * entry is returned, or null if that entry does not have a certificate
174+ * chain.
175+ *
176+ * @param alias the alias name
177+ *
178+ * @return the certificate, or null if the given alias does not exist or
179+ * does not contain a certificate.
180+ */
181+ public Certificate engineGetCertificate(String alias) {
182+ Object entry = entries.get(convertAlias(alias));
183+
184+ if (entry != null) {
185+ if (entry instanceof TrustedCertEntry) {
186+ return ((TrustedCertEntry)entry).cert;
187+ } else {
188+ if (((KeyEntry)entry).chain == null) {
189+ return null;
190+ } else {
191+ return ((KeyEntry)entry).chain[0];
192+ }
193+ }
194+ } else {
195+ return null;
196+ }
197+ }
198+
199+ /**
200+ * Returns the creation date of the entry identified by the given alias.
201+ *
202+ * @param alias the alias name
203+ *
204+ * @return the creation date of this entry, or null if the given alias does
205+ * not exist
206+ */
207+ public Date engineGetCreationDate(String alias) {
208+ Object entry = entries.get(convertAlias(alias));
209+
210+ if (entry != null) {
211+ if (entry instanceof TrustedCertEntry) {
212+ return new Date(((TrustedCertEntry)entry).date.getTime());
213+ } else {
214+ return new Date(((KeyEntry)entry).date.getTime());
215+ }
216+ } else {
217+ return null;
218+ }
219+ }
220+
221+ /**
222+ * Assigns the given private key to the given alias, protecting
223+ * it with the given password as defined in PKCS8.
224+ *
225+ * <p>The given java.security.PrivateKey <code>key</code> must
226+ * be accompanied by a certificate chain certifying the
227+ * corresponding public key.
228+ *
229+ * <p>If the given alias already exists, the keystore information
230+ * associated with it is overridden by the given key and certificate
231+ * chain.
232+ *
233+ * @param alias the alias name
234+ * @param key the private key to be associated with the alias
235+ * @param password the password to protect the key
236+ * @param chain the certificate chain for the corresponding public
237+ * key (only required if the given key is of type
238+ * <code>java.security.PrivateKey</code>).
239+ *
240+ * @exception KeyStoreException if the given key is not a private key,
241+ * cannot be protected, or this operation fails for some other reason
242+ */
243+ public void engineSetKeyEntry(String alias, Key key, char[] password,
244+ Certificate[] chain)
245+ throws KeyStoreException
246+ {
247+ KeyProtector keyProtector = null;
248+
249+ if (!(key instanceof java.security.PrivateKey)) {
250+ throw new KeyStoreException("Cannot store non-PrivateKeys");
251+ }
252+ try {
253+ synchronized(entries) {
254+ KeyEntry entry = new KeyEntry();
255+ entry.date = new Date();
256+
257+ // Protect the encoding of the key
258+ keyProtector = new KeyProtector(password);
259+ entry.protectedPrivKey = keyProtector.protect(key);
260+
261+ // clone the chain
262+ if ((chain != null) &&
263+ (chain.length != 0)) {
264+ entry.chain = chain.clone();
265+ } else {
266+ entry.chain = null;
267+ }
268+
269+ entries.put(convertAlias(alias), entry);
270+ }
271+ } catch (NoSuchAlgorithmException nsae) {
272+ throw new KeyStoreException("Key protection algorithm not found");
273+ } finally {
274+ keyProtector = null;
275+ }
276+ }
277+
278+ /**
279+ * Assigns the given key (that has already been protected) to the given
280+ * alias.
281+ *
282+ * <p>If the protected key is of type
283+ * <code>java.security.PrivateKey</code>, it must be accompanied by a
284+ * certificate chain certifying the corresponding public key. If the
285+ * underlying keystore implementation is of type <code>jks</code>,
286+ * <code>key</code> must be encoded as an
287+ * <code>EncryptedPrivateKeyInfo</code> as defined in the PKCS #8 standard.
288+ *
289+ * <p>If the given alias already exists, the keystore information
290+ * associated with it is overridden by the given key (and possibly
291+ * certificate chain).
292+ *
293+ * @param alias the alias name
294+ * @param key the key (in protected format) to be associated with the alias
295+ * @param chain the certificate chain for the corresponding public
296+ * key (only useful if the protected key is of type
297+ * <code>java.security.PrivateKey</code>).
298+ *
299+ * @exception KeyStoreException if this operation fails.
300+ */
301+ public void engineSetKeyEntry(String alias, byte[] key,
302+ Certificate[] chain)
303+ throws KeyStoreException
304+ {
305+ synchronized(entries) {
306+ // key must be encoded as EncryptedPrivateKeyInfo as defined in
307+ // PKCS#8
308+ try {
309+ new EncryptedPrivateKeyInfo(key);
310+ } catch (IOException ioe) {
311+ throw new KeyStoreException("key is not encoded as "
312+ + "EncryptedPrivateKeyInfo");
313+ }
314+
315+ KeyEntry entry = new KeyEntry();
316+ entry.date = new Date();
317+
318+ entry.protectedPrivKey = key.clone();
319+ if ((chain != null) &&
320+ (chain.length != 0)) {
321+ entry.chain = chain.clone();
322+ } else {
323+ entry.chain = null;
324+ }
325+
326+ entries.put(convertAlias(alias), entry);
327+ }
328+ }
329+
330+ /**
331+ * Assigns the given certificate to the given alias.
332+ *
333+ * <p>If the given alias already exists in this keystore and identifies a
334+ * <i>trusted certificate entry</i>, the certificate associated with it is
335+ * overridden by the given certificate.
336+ *
337+ * @param alias the alias name
338+ * @param cert the certificate
339+ *
340+ * @exception KeyStoreException if the given alias already exists and does
341+ * not identify a <i>trusted certificate entry</i>, or this operation
342+ * fails for some other reason.
343+ */
344+ public void engineSetCertificateEntry(String alias, Certificate cert)
345+ throws KeyStoreException
346+ {
347+ synchronized(entries) {
348+
349+ Object entry = entries.get(convertAlias(alias));
350+ if ((entry != null) && (entry instanceof KeyEntry)) {
351+ throw new KeyStoreException
352+ ("Cannot overwrite own certificate");
353+ }
354+
355+ TrustedCertEntry trustedCertEntry = new TrustedCertEntry();
356+ trustedCertEntry.cert = cert;
357+ trustedCertEntry.date = new Date();
358+ entries.put(convertAlias(alias), trustedCertEntry);
359+ }
360+ }
361+
362+ /**
363+ * Deletes the entry identified by the given alias from this keystore.
364+ *
365+ * @param alias the alias name
366+ *
367+ * @exception KeyStoreException if the entry cannot be removed.
368+ */
369+ public void engineDeleteEntry(String alias)
370+ throws KeyStoreException
371+ {
372+ synchronized(entries) {
373+ entries.remove(convertAlias(alias));
374+ }
375+ }
376+
377+ /**
378+ * Lists all the alias names of this keystore.
379+ *
380+ * @return enumeration of the alias names
381+ */
382+ public Enumeration<String> engineAliases() {
383+ return entries.keys();
384+ }
385+
386+ /**
387+ * Checks if the given alias exists in this keystore.
388+ *
389+ * @param alias the alias name
390+ *
391+ * @return true if the alias exists, false otherwise
392+ */
393+ public boolean engineContainsAlias(String alias) {
394+ return entries.containsKey(convertAlias(alias));
395+ }
396+
397+ /**
398+ * Retrieves the number of entries in this keystore.
399+ *
400+ * @return the number of entries in this keystore
401+ */
402+ public int engineSize() {
403+ return entries.size();
404+ }
405+
406+ /**
407+ * Returns true if the entry identified by the given alias is a
408+ * <i>key entry</i>, and false otherwise.
409+ *
410+ * @return true if the entry identified by the given alias is a
411+ * <i>key entry</i>, false otherwise.
412+ */
413+ public boolean engineIsKeyEntry(String alias) {
414+ Object entry = entries.get(convertAlias(alias));
415+ if ((entry != null) && (entry instanceof KeyEntry)) {
416+ return true;
417+ } else {
418+ return false;
419+ }
420+ }
421+
422+ /**
423+ * Returns true if the entry identified by the given alias is a
424+ * <i>trusted certificate entry</i>, and false otherwise.
425+ *
426+ * @return true if the entry identified by the given alias is a
427+ * <i>trusted certificate entry</i>, false otherwise.
428+ */
429+ public boolean engineIsCertificateEntry(String alias) {
430+ Object entry = entries.get(convertAlias(alias));
431+ if ((entry != null) && (entry instanceof TrustedCertEntry)) {
432+ return true;
433+ } else {
434+ return false;
435+ }
436+ }
437+
438+ /**
439+ * Returns the (alias) name of the first keystore entry whose certificate
440+ * matches the given certificate.
441+ *
442+ * <p>This method attempts to match the given certificate with each
443+ * keystore entry. If the entry being considered
444+ * is a <i>trusted certificate entry</i>, the given certificate is
445+ * compared to that entry's certificate. If the entry being considered is
446+ * a <i>key entry</i>, the given certificate is compared to the first
447+ * element of that entry's certificate chain (if a chain exists).
448+ *
449+ * @param cert the certificate to match with.
450+ *
451+ * @return the (alias) name of the first entry with matching certificate,
452+ * or null if no such entry exists in this keystore.
453+ */
454+ public String engineGetCertificateAlias(Certificate cert) {
455+ Certificate certElem;
456+
457+ for (Enumeration<String> e = entries.keys(); e.hasMoreElements(); ) {
458+ String alias = e.nextElement();
459+ Object entry = entries.get(alias);
460+ if (entry instanceof TrustedCertEntry) {
461+ certElem = ((TrustedCertEntry)entry).cert;
462+ } else if (((KeyEntry)entry).chain != null) {
463+ certElem = ((KeyEntry)entry).chain[0];
464+ } else {
465+ continue;
466+ }
467+ if (certElem.equals(cert)) {
468+ return alias;
469+ }
470+ }
471+ return null;
472+ }
473+
474+ /**
475+ * Stores this keystore to the given output stream, and protects its
476+ * integrity with the given password.
477+ *
478+ * @param stream the output stream to which this keystore is written.
479+ * @param password the password to generate the keystore integrity check
480+ *
481+ * @exception IOException if there was an I/O problem with data
482+ * @exception NoSuchAlgorithmException if the appropriate data integrity
483+ * algorithm could not be found
484+ * @exception CertificateException if any of the certificates included in
485+ * the keystore data could not be stored
486+ */
487+ public void engineStore(OutputStream stream, char[] password)
488+ throws IOException, NoSuchAlgorithmException, CertificateException
489+ {
490+ synchronized(entries) {
491+ /*
492+ * KEYSTORE FORMAT:
493+ *
494+ * Magic number (big-endian integer),
495+ * Version of this file format (big-endian integer),
496+ *
497+ * Count (big-endian integer),
498+ * followed by "count" instances of either:
499+ *
500+ * {
501+ * tag=1 (big-endian integer),
502+ * alias (UTF string)
503+ * timestamp
504+ * encrypted private-key info according to PKCS #8
505+ * (integer length followed by encoding)
506+ * cert chain (integer count, then certs; for each cert,
507+ * integer length followed by encoding)
508+ * }
509+ *
510+ * or:
511+ *
512+ * {
513+ * tag=2 (big-endian integer)
514+ * alias (UTF string)
515+ * timestamp
516+ * cert (integer length followed by encoding)
517+ * }
518+ *
519+ * ended by a keyed SHA1 hash (bytes only) of
520+ * { password + whitener + preceding body }
521+ */
522+
523+ // password is mandatory when storing
524+ if (password == null) {
525+ throw new IllegalArgumentException("password can't be null");
526+ }
527+
528+ byte[] encoded; // the certificate encoding
529+
530+ MessageDigest md = getPreKeyedHash(password);
531+ DataOutputStream dos
532+ = new DataOutputStream(new DigestOutputStream(stream, md));
533+
534+ dos.writeInt(MAGIC);
535+ // always write the latest version
536+ dos.writeInt(VERSION_2);
537+
538+ dos.writeInt(entries.size());
539+
540+ for (Enumeration<String> e = entries.keys(); e.hasMoreElements();) {
541+
542+ String alias = e.nextElement();
543+ Object entry = entries.get(alias);
544+
545+ if (entry instanceof KeyEntry) {
546+
547+ // Store this entry as a KeyEntry
548+ dos.writeInt(1);
549+
550+ // Write the alias
551+ dos.writeUTF(alias);
552+
553+ // Write the (entry creation) date
554+ dos.writeLong(((KeyEntry)entry).date.getTime());
555+
556+ // Write the protected private key
557+ dos.writeInt(((KeyEntry)entry).protectedPrivKey.length);
558+ dos.write(((KeyEntry)entry).protectedPrivKey);
559+
560+ // Write the certificate chain
561+ int chainLen;
562+ if (((KeyEntry)entry).chain == null) {
563+ chainLen = 0;
564+ } else {
565+ chainLen = ((KeyEntry)entry).chain.length;
566+ }
567+ dos.writeInt(chainLen);
568+ for (int i = 0; i < chainLen; i++) {
569+ encoded = ((KeyEntry)entry).chain[i].getEncoded();
570+ dos.writeUTF(((KeyEntry)entry).chain[i].getType());
571+ dos.writeInt(encoded.length);
572+ dos.write(encoded);
573+ }
574+ } else {
575+
576+ // Store this entry as a certificate
577+ dos.writeInt(2);
578+
579+ // Write the alias
580+ dos.writeUTF(alias);
581+
582+ // Write the (entry creation) date
583+ dos.writeLong(((TrustedCertEntry)entry).date.getTime());
584+
585+ // Write the trusted certificate
586+ encoded = ((TrustedCertEntry)entry).cert.getEncoded();
587+ dos.writeUTF(((TrustedCertEntry)entry).cert.getType());
588+ dos.writeInt(encoded.length);
589+ dos.write(encoded);
590+ }
591+ }
592+
593+ /*
594+ * Write the keyed hash which is used to detect tampering with
595+ * the keystore (such as deleting or modifying key or
596+ * certificate entries).
597+ */
598+ byte digest[] = md.digest();
599+
600+ dos.write(digest);
601+ dos.flush();
602+ }
603+ }
604+
605+ /**
606+ * Loads the keystore from the given input stream.
607+ *
608+ * <p>If a password is given, it is used to check the integrity of the
609+ * keystore data. Otherwise, the integrity of the keystore is not checked.
610+ *
611+ * @param stream the input stream from which the keystore is loaded
612+ * @param password the (optional) password used to check the integrity of
613+ * the keystore.
614+ *
615+ * @exception IOException if there is an I/O or format problem with the
616+ * keystore data
617+ * @exception NoSuchAlgorithmException if the algorithm used to check
618+ * the integrity of the keystore cannot be found
619+ * @exception CertificateException if any of the certificates in the
620+ * keystore could not be loaded
621+ */
622+ public void engineLoad(InputStream stream, char[] password)
623+ throws IOException, NoSuchAlgorithmException, CertificateException
624+ {
625+ synchronized(entries) {
626+ DataInputStream dis;
627+ MessageDigest md = null;
628+ CertificateFactory cf = null;
629+ Hashtable<String, CertificateFactory> cfs = null;
630+ ByteArrayInputStream bais = null;
631+ byte[] encoded = null;
632+
633+ if (stream == null)
634+ return;
635+
636+ if (password != null) {
637+ md = getPreKeyedHash(password);
638+ dis = new DataInputStream(new DigestInputStream(stream, md));
639+ } else {
640+ dis = new DataInputStream(stream);
641+ }
642+
643+ // Body format: see store method
644+
645+ int xMagic = dis.readInt();
646+ int xVersion = dis.readInt();
647+
648+ if (xMagic!=MAGIC ||
649+ (xVersion!=VERSION_1 && xVersion!=VERSION_2)) {
650+ throw new IOException("Invalid keystore format");
651+ }
652+
653+ if (xVersion == VERSION_1) {
654+ cf = CertificateFactory.getInstance("X509");
655+ } else {
656+ // version 2
657+ cfs = new Hashtable<String, CertificateFactory>(3);
658+ }
659+
660+ entries.clear();
661+ int count = dis.readInt();
662+
663+ for (int i = 0; i < count; i++) {
664+ int tag;
665+ String alias;
666+
667+ tag = dis.readInt();
668+
669+ if (tag == 1) { // private key entry
670+
671+ KeyEntry entry = new KeyEntry();
672+
673+ // Read the alias
674+ alias = dis.readUTF();
675+
676+ // Read the (entry creation) date
677+ entry.date = new Date(dis.readLong());
678+
679+ // Read the private key
680+ entry.protectedPrivKey =
681+ IOUtils.readFully(dis, dis.readInt(), true);
682+
683+ // Read the certificate chain
684+ int numOfCerts = dis.readInt();
685+ if (numOfCerts > 0) {
686+ List<Certificate> certs = new ArrayList<>(
687+ numOfCerts > 10 ? 10 : numOfCerts);
688+ for (int j = 0; j < numOfCerts; j++) {
689+ if (xVersion == 2) {
690+ // read the certificate type, and instantiate a
691+ // certificate factory of that type (reuse
692+ // existing factory if possible)
693+ String certType = dis.readUTF();
694+ if (cfs.containsKey(certType)) {
695+ // reuse certificate factory
696+ cf = cfs.get(certType);
697+ } else {
698+ // create new certificate factory
699+ cf = CertificateFactory.getInstance(certType);
700+ // store the certificate factory so we can
701+ // reuse it later
702+ cfs.put(certType, cf);
703+ }
704+ }
705+ // instantiate the certificate
706+ encoded = IOUtils.readFully(dis, dis.readInt(), true);
707+ bais = new ByteArrayInputStream(encoded);
708+ certs.add(cf.generateCertificate(bais));
709+ bais.close();
710+ }
711+ // We can be sure now that numOfCerts of certs are read
712+ entry.chain = certs.toArray(new Certificate[numOfCerts]);
713+ }
714+
715+ // Add the entry to the list
716+ entries.put(alias, entry);
717+
718+ } else if (tag == 2) { // trusted certificate entry
719+
720+ TrustedCertEntry entry = new TrustedCertEntry();
721+
722+ // Read the alias
723+ alias = dis.readUTF();
724+
725+ // Read the (entry creation) date
726+ entry.date = new Date(dis.readLong());
727+
728+ // Read the trusted certificate
729+ if (xVersion == 2) {
730+ // read the certificate type, and instantiate a
731+ // certificate factory of that type (reuse
732+ // existing factory if possible)
733+ String certType = dis.readUTF();
734+ if (cfs.containsKey(certType)) {
735+ // reuse certificate factory
736+ cf = cfs.get(certType);
737+ } else {
738+ // create new certificate factory
739+ cf = CertificateFactory.getInstance(certType);
740+ // store the certificate factory so we can
741+ // reuse it later
742+ cfs.put(certType, cf);
743+ }
744+ }
745+ encoded = IOUtils.readFully(dis, dis.readInt(), true);
746+ bais = new ByteArrayInputStream(encoded);
747+ entry.cert = cf.generateCertificate(bais);
748+ bais.close();
749+
750+ // Add the entry to the list
751+ entries.put(alias, entry);
752+
753+ } else {
754+ throw new IOException("Unrecognized keystore entry");
755+ }
756+ }
757+
758+ /*
759+ * If a password has been provided, we check the keyed digest
760+ * at the end. If this check fails, the store has been tampered
761+ * with
762+ */
763+ if (password != null) {
764+ byte computed[], actual[];
765+ computed = md.digest();
766+ actual = new byte[computed.length];
767+ dis.readFully(actual);
768+ for (int i = 0; i < computed.length; i++) {
769+ if (computed[i] != actual[i]) {
770+ Throwable t = new UnrecoverableKeyException
771+ ("Password verification failed");
772+ throw (IOException)new IOException
773+ ("Keystore was tampered with, or "
774+ + "password was incorrect").initCause(t);
775+ }
776+ }
777+ }
778+ }
779+ }
780+
781+ /**
782+ * To guard against tampering with the keystore, we append a keyed
783+ * hash with a bit of whitener.
784+ */
785+ private MessageDigest getPreKeyedHash(char[] password)
786+ throws NoSuchAlgorithmException, UnsupportedEncodingException
787+ {
788+ int i, j;
789+
790+ MessageDigest md = MessageDigest.getInstance("SHA");
791+ byte[] passwdBytes = new byte[password.length * 2];
792+ for (i=0, j=0; i<password.length; i++) {
793+ passwdBytes[j++] = (byte)(password[i] >> 8);
794+ passwdBytes[j++] = (byte)password[i];
795+ }
796+ md.update(passwdBytes);
797+ for (i=0; i<passwdBytes.length; i++)
798+ passwdBytes[i] = 0;
799+ md.update("Mighty Aphrodite".getBytes("UTF8"));
800+ return md;
801+ }
802+}