1 /*
2 * Copyright (c) 1997, 2014, 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
35 import sun.misc.IOUtils;
36 import sun.security.pkcs.EncryptedPrivateKeyInfo;
37 import sun.security.pkcs12.PKCS12KeyStore;
38 import sun.security.util.KeyStoreDelegator;
39
40 /**
41 * This class provides the keystore implementation referred to as "JKS".
42 *
43 * @author Jan Luehe
44 * @author David Brownell
45 *
46 *
47 * @see KeyProtector
48 * @see java.security.KeyStoreSpi
49 * @see KeyTool
50 *
51 * @since 1.2
52 */
53
54 public abstract class JavaKeyStore extends KeyStoreSpi {
55
56 // regular JKS
57 public static final class JKS extends JavaKeyStore {
58 String convertAlias(String alias) {
59 return alias.toLowerCase(Locale.ENGLISH);
60 }
61 }
62
63 // special JKS that uses case sensitive aliases
64 public static final class CaseExactJKS extends JavaKeyStore {
65 String convertAlias(String alias) {
66 return alias;
67 }
68 }
69
70 // special JKS that supports JKS and PKCS12 file formats
71 public static final class DualFormatJKS extends KeyStoreDelegator {
72 public DualFormatJKS() {
73 super("JKS", JKS.class, "PKCS12", PKCS12KeyStore.class);
74 }
75 }
76
77 private static final int MAGIC = 0xfeedfeed;
78 private static final int VERSION_1 = 0x01;
79 private static final int VERSION_2 = 0x02;
80
81 // Private keys and their supporting certificate chains
82 private static class KeyEntry {
83 Date date; // the creation date of this entry
84 byte[] protectedPrivKey;
85 Certificate[] chain;
86 };
87
88 // Trusted certificates
89 private static class TrustedCertEntry {
90 Date date; // the creation date of this entry
91 Certificate cert;
92 };
93
94 /**
95 * Private keys and certificates are stored in a hashtable.
96 * Hash entries are keyed by alias names.
97 */
98 private final Hashtable<String, Object> entries;
99
100 JavaKeyStore() {
101 entries = new Hashtable<String, Object>();
102 }
103
104 // convert an alias to internal form, overridden in subclasses:
105 // lower case for regular JKS
106 // original string for CaseExactJKS
107 abstract String convertAlias(String alias);
108
109 /**
110 * Returns the key associated with the given alias, using the given
111 * password to recover it.
112 *
113 * @param alias the alias name
114 * @param password the password for recovering the key
115 *
116 * @return the requested key, or null if the given alias does not exist
117 * or does not identify a <i>key entry</i>.
118 *
119 * @exception NoSuchAlgorithmException if the algorithm for recovering the
120 * key cannot be found
121 * @exception UnrecoverableKeyException if the key cannot be recovered
122 * (e.g., the given password is wrong).
123 */
124 public Key engineGetKey(String alias, char[] password)
125 throws NoSuchAlgorithmException, UnrecoverableKeyException
126 {
127 Object entry = entries.get(convertAlias(alias));
128
129 if (entry == null || !(entry instanceof KeyEntry)) {
130 return null;
131 }
132 if (password == null) {
133 throw new UnrecoverableKeyException("Password must not be null");
134 }
135
136 KeyProtector keyProtector = new KeyProtector(password);
137 byte[] encrBytes = ((KeyEntry)entry).protectedPrivKey;
138 EncryptedPrivateKeyInfo encrInfo;
139 byte[] plain;
140 try {
141 encrInfo = new EncryptedPrivateKeyInfo(encrBytes);
142 } catch (IOException ioe) {
143 throw new UnrecoverableKeyException("Private key not stored as "
144 + "PKCS #8 "
145 + "EncryptedPrivateKeyInfo");
146 }
147 return keyProtector.recover(encrInfo);
148 }
149
150 /**
151 * Returns the certificate chain associated with the given alias.
152 *
153 * @param alias the alias name
154 *
155 * @return the certificate chain (ordered with the user's certificate first
156 * and the root certificate authority last), or null if the given alias
157 * does not exist or does not contain a certificate chain (i.e., the given
158 * alias identifies either a <i>trusted certificate entry</i> or a
159 * <i>key entry</i> without a certificate chain).
160 */
161 public Certificate[] engineGetCertificateChain(String alias) {
162 Object entry = entries.get(convertAlias(alias));
163
164 if (entry != null && entry instanceof KeyEntry) {
165 if (((KeyEntry)entry).chain == null) {
166 return null;
167 } else {
168 return ((KeyEntry)entry).chain.clone();
169 }
170 } else {
171 return null;
172 }
173 }
174
175 /**
176 * Returns the certificate associated with the given alias.
177 *
178 * <p>If the given alias name identifies a
179 * <i>trusted certificate entry</i>, the certificate associated with that
180 * entry is returned. If the given alias name identifies a
181 * <i>key entry</i>, the first element of the certificate chain of that
182 * entry is returned, or null if that entry does not have a certificate
183 * chain.
184 *
185 * @param alias the alias name
186 *
187 * @return the certificate, or null if the given alias does not exist or
188 * does not contain a certificate.
189 */
190 public Certificate engineGetCertificate(String alias) {
191 Object entry = entries.get(convertAlias(alias));
192
193 if (entry != null) {
194 if (entry instanceof TrustedCertEntry) {
195 return ((TrustedCertEntry)entry).cert;
196 } else {
197 if (((KeyEntry)entry).chain == null) {
198 return null;
199 } else {
200 return ((KeyEntry)entry).chain[0];
201 }
202 }
203 } else {
204 return null;
205 }
206 }
207
208 /**
209 * Returns the creation date of the entry identified by the given alias.
210 *
211 * @param alias the alias name
212 *
213 * @return the creation date of this entry, or null if the given alias does
214 * not exist
215 */
216 public Date engineGetCreationDate(String alias) {
217 Object entry = entries.get(convertAlias(alias));
218
219 if (entry != null) {
220 if (entry instanceof TrustedCertEntry) {
221 return new Date(((TrustedCertEntry)entry).date.getTime());
222 } else {
223 return new Date(((KeyEntry)entry).date.getTime());
224 }
225 } else {
226 return null;
227 }
228 }
229
230 /**
231 * Assigns the given private key to the given alias, protecting
232 * it with the given password as defined in PKCS8.
233 *
234 * <p>The given java.security.PrivateKey <code>key</code> must
235 * be accompanied by a certificate chain certifying the
236 * corresponding public key.
237 *
238 * <p>If the given alias already exists, the keystore information
239 * associated with it is overridden by the given key and certificate
240 * chain.
241 *
242 * @param alias the alias name
243 * @param key the private key to be associated with the alias
244 * @param password the password to protect the key
245 * @param chain the certificate chain for the corresponding public
246 * key (only required if the given key is of type
247 * <code>java.security.PrivateKey</code>).
248 *
249 * @exception KeyStoreException if the given key is not a private key,
250 * cannot be protected, or this operation fails for some other reason
251 */
252 public void engineSetKeyEntry(String alias, Key key, char[] password,
253 Certificate[] chain)
254 throws KeyStoreException
255 {
256 KeyProtector keyProtector = null;
257
258 if (!(key instanceof java.security.PrivateKey)) {
259 throw new KeyStoreException("Cannot store non-PrivateKeys");
260 }
261 try {
262 synchronized(entries) {
263 KeyEntry entry = new KeyEntry();
264 entry.date = new Date();
265
266 // Protect the encoding of the key
267 keyProtector = new KeyProtector(password);
268 entry.protectedPrivKey = keyProtector.protect(key);
269
270 // clone the chain
271 if ((chain != null) &&
272 (chain.length != 0)) {
273 entry.chain = chain.clone();
274 } else {
275 entry.chain = null;
276 }
277
278 entries.put(convertAlias(alias), entry);
279 }
280 } catch (NoSuchAlgorithmException nsae) {
281 throw new KeyStoreException("Key protection algorithm not found");
282 } finally {
283 keyProtector = null;
284 }
285 }
286
287 /**
288 * Assigns the given key (that has already been protected) to the given
289 * alias.
290 *
291 * <p>If the protected key is of type
292 * <code>java.security.PrivateKey</code>, it must be accompanied by a
293 * certificate chain certifying the corresponding public key. If the
294 * underlying keystore implementation is of type <code>jks</code>,
295 * <code>key</code> must be encoded as an
296 * <code>EncryptedPrivateKeyInfo</code> as defined in the PKCS #8 standard.
297 *
298 * <p>If the given alias already exists, the keystore information
299 * associated with it is overridden by the given key (and possibly
300 * certificate chain).
301 *
302 * @param alias the alias name
303 * @param key the key (in protected format) to be associated with the alias
304 * @param chain the certificate chain for the corresponding public
305 * key (only useful if the protected key is of type
306 * <code>java.security.PrivateKey</code>).
307 *
308 * @exception KeyStoreException if this operation fails.
309 */
310 public void engineSetKeyEntry(String alias, byte[] key,
311 Certificate[] chain)
312 throws KeyStoreException
313 {
314 synchronized(entries) {
315 // key must be encoded as EncryptedPrivateKeyInfo as defined in
316 // PKCS#8
317 try {
318 new EncryptedPrivateKeyInfo(key);
319 } catch (IOException ioe) {
320 throw new KeyStoreException("key is not encoded as "
321 + "EncryptedPrivateKeyInfo");
322 }
323
324 KeyEntry entry = new KeyEntry();
325 entry.date = new Date();
326
327 entry.protectedPrivKey = key.clone();
328 if ((chain != null) &&
329 (chain.length != 0)) {
330 entry.chain = chain.clone();
331 } else {
332 entry.chain = null;
333 }
334
335 entries.put(convertAlias(alias), entry);
336 }
337 }
338
339 /**
340 * Assigns the given certificate to the given alias.
341 *
342 * <p>If the given alias already exists in this keystore and identifies a
343 * <i>trusted certificate entry</i>, the certificate associated with it is
344 * overridden by the given certificate.
345 *
346 * @param alias the alias name
347 * @param cert the certificate
348 *
349 * @exception KeyStoreException if the given alias already exists and does
350 * not identify a <i>trusted certificate entry</i>, or this operation
351 * fails for some other reason.
352 */
353 public void engineSetCertificateEntry(String alias, Certificate cert)
354 throws KeyStoreException
355 {
356 synchronized(entries) {
357
358 Object entry = entries.get(convertAlias(alias));
359 if ((entry != null) && (entry instanceof KeyEntry)) {
360 throw new KeyStoreException
361 ("Cannot overwrite own certificate");
362 }
363
364 TrustedCertEntry trustedCertEntry = new TrustedCertEntry();
365 trustedCertEntry.cert = cert;
366 trustedCertEntry.date = new Date();
367 entries.put(convertAlias(alias), trustedCertEntry);
368 }
369 }
370
371 /**
372 * Deletes the entry identified by the given alias from this keystore.
373 *
374 * @param alias the alias name
375 *
376 * @exception KeyStoreException if the entry cannot be removed.
377 */
378 public void engineDeleteEntry(String alias)
379 throws KeyStoreException
380 {
381 synchronized(entries) {
382 entries.remove(convertAlias(alias));
383 }
384 }
385
386 /**
387 * Lists all the alias names of this keystore.
388 *
389 * @return enumeration of the alias names
390 */
391 public Enumeration<String> engineAliases() {
392 return entries.keys();
393 }
394
395 /**
396 * Checks if the given alias exists in this keystore.
397 *
398 * @param alias the alias name
399 *
400 * @return true if the alias exists, false otherwise
401 */
402 public boolean engineContainsAlias(String alias) {
403 return entries.containsKey(convertAlias(alias));
404 }
405
406 /**
407 * Retrieves the number of entries in this keystore.
408 *
409 * @return the number of entries in this keystore
410 */
411 public int engineSize() {
412 return entries.size();
413 }
414
415 /**
416 * Returns true if the entry identified by the given alias is a
417 * <i>key entry</i>, and false otherwise.
418 *
419 * @return true if the entry identified by the given alias is a
420 * <i>key entry</i>, false otherwise.
421 */
422 public boolean engineIsKeyEntry(String alias) {
423 Object entry = entries.get(convertAlias(alias));
424 if ((entry != null) && (entry instanceof KeyEntry)) {
425 return true;
426 } else {
427 return false;
428 }
429 }
430
431 /**
432 * Returns true if the entry identified by the given alias is a
433 * <i>trusted certificate entry</i>, and false otherwise.
434 *
435 * @return true if the entry identified by the given alias is a
436 * <i>trusted certificate entry</i>, false otherwise.
437 */
438 public boolean engineIsCertificateEntry(String alias) {
439 Object entry = entries.get(convertAlias(alias));
440 if ((entry != null) && (entry instanceof TrustedCertEntry)) {
441 return true;
442 } else {
443 return false;
444 }
445 }
446
447 /**
448 * Returns the (alias) name of the first keystore entry whose certificate
449 * matches the given certificate.
450 *
451 * <p>This method attempts to match the given certificate with each
452 * keystore entry. If the entry being considered
453 * is a <i>trusted certificate entry</i>, the given certificate is
454 * compared to that entry's certificate. If the entry being considered is
455 * a <i>key entry</i>, the given certificate is compared to the first
456 * element of that entry's certificate chain (if a chain exists).
457 *
458 * @param cert the certificate to match with.
459 *
460 * @return the (alias) name of the first entry with matching certificate,
461 * or null if no such entry exists in this keystore.
462 */
463 public String engineGetCertificateAlias(Certificate cert) {
464 Certificate certElem;
465
466 for (Enumeration<String> e = entries.keys(); e.hasMoreElements(); ) {
467 String alias = e.nextElement();
468 Object entry = entries.get(alias);
469 if (entry instanceof TrustedCertEntry) {
470 certElem = ((TrustedCertEntry)entry).cert;
471 } else if (((KeyEntry)entry).chain != null) {
472 certElem = ((KeyEntry)entry).chain[0];
473 } else {
474 continue;
475 }
476 if (certElem.equals(cert)) {
477 return alias;
478 }
479 }
480 return null;
481 }
482
483 /**
484 * Stores this keystore to the given output stream, and protects its
485 * integrity with the given password.
486 *
487 * @param stream the output stream to which this keystore is written.
488 * @param password the password to generate the keystore integrity check
489 *
490 * @exception IOException if there was an I/O problem with data
491 * @exception NoSuchAlgorithmException if the appropriate data integrity
492 * algorithm could not be found
493 * @exception CertificateException if any of the certificates included in
494 * the keystore data could not be stored
495 */
496 public void engineStore(OutputStream stream, char[] password)
497 throws IOException, NoSuchAlgorithmException, CertificateException
498 {
499 synchronized(entries) {
500 /*
501 * KEYSTORE FORMAT:
502 *
503 * Magic number (big-endian integer),
504 * Version of this file format (big-endian integer),
505 *
506 * Count (big-endian integer),
507 * followed by "count" instances of either:
508 *
509 * {
510 * tag=1 (big-endian integer),
511 * alias (UTF string)
512 * timestamp
513 * encrypted private-key info according to PKCS #8
514 * (integer length followed by encoding)
515 * cert chain (integer count, then certs; for each cert,
516 * integer length followed by encoding)
517 * }
518 *
519 * or:
520 *
521 * {
522 * tag=2 (big-endian integer)
523 * alias (UTF string)
524 * timestamp
525 * cert (integer length followed by encoding)
526 * }
527 *
528 * ended by a keyed SHA1 hash (bytes only) of
529 * { password + whitener + preceding body }
530 */
531
532 // password is mandatory when storing
533 if (password == null) {
534 throw new IllegalArgumentException("password can't be null");
535 }
536
537 byte[] encoded; // the certificate encoding
538
539 MessageDigest md = getPreKeyedHash(password);
540 DataOutputStream dos
541 = new DataOutputStream(new DigestOutputStream(stream, md));
542
543 dos.writeInt(MAGIC);
544 // always write the latest version
545 dos.writeInt(VERSION_2);
546
547 dos.writeInt(entries.size());
548
549 for (Enumeration<String> e = entries.keys(); e.hasMoreElements();) {
550
551 String alias = e.nextElement();
552 Object entry = entries.get(alias);
553
554 if (entry instanceof KeyEntry) {
555
556 // Store this entry as a KeyEntry
557 dos.writeInt(1);
558
559 // Write the alias
560 dos.writeUTF(alias);
561
562 // Write the (entry creation) date
563 dos.writeLong(((KeyEntry)entry).date.getTime());
564
565 // Write the protected private key
566 dos.writeInt(((KeyEntry)entry).protectedPrivKey.length);
567 dos.write(((KeyEntry)entry).protectedPrivKey);
568
569 // Write the certificate chain
570 int chainLen;
571 if (((KeyEntry)entry).chain == null) {
572 chainLen = 0;
573 } else {
574 chainLen = ((KeyEntry)entry).chain.length;
575 }
576 dos.writeInt(chainLen);
577 for (int i = 0; i < chainLen; i++) {
578 encoded = ((KeyEntry)entry).chain[i].getEncoded();
579 dos.writeUTF(((KeyEntry)entry).chain[i].getType());
580 dos.writeInt(encoded.length);
581 dos.write(encoded);
582 }
583 } else {
584
585 // Store this entry as a certificate
586 dos.writeInt(2);
587
588 // Write the alias
589 dos.writeUTF(alias);
590
591 // Write the (entry creation) date
592 dos.writeLong(((TrustedCertEntry)entry).date.getTime());
593
594 // Write the trusted certificate
595 encoded = ((TrustedCertEntry)entry).cert.getEncoded();
596 dos.writeUTF(((TrustedCertEntry)entry).cert.getType());
597 dos.writeInt(encoded.length);
598 dos.write(encoded);
599 }
600 }
601
602 /*
603 * Write the keyed hash which is used to detect tampering with
604 * the keystore (such as deleting or modifying key or
605 * certificate entries).
606 */
607 byte[] digest = md.digest();
608
609 dos.write(digest);
610 dos.flush();
611 }
612 }
613
614 /**
615 * Loads the keystore from the given input stream.
616 *
617 * <p>If a password is given, it is used to check the integrity of the
618 * keystore data. Otherwise, the integrity of the keystore is not checked.
619 *
620 * @param stream the input stream from which the keystore is loaded
621 * @param password the (optional) password used to check the integrity of
622 * the keystore.
623 *
624 * @exception IOException if there is an I/O or format problem with the
625 * keystore data
626 * @exception NoSuchAlgorithmException if the algorithm used to check
627 * the integrity of the keystore cannot be found
628 * @exception CertificateException if any of the certificates in the
629 * keystore could not be loaded
630 */
631 public void engineLoad(InputStream stream, char[] password)
632 throws IOException, NoSuchAlgorithmException, CertificateException
633 {
634 synchronized(entries) {
635 DataInputStream dis;
636 MessageDigest md = null;
637 CertificateFactory cf = null;
638 Hashtable<String, CertificateFactory> cfs = null;
639 ByteArrayInputStream bais = null;
640 byte[] encoded = null;
641
642 if (stream == null)
643 return;
644
645 if (password != null) {
646 md = getPreKeyedHash(password);
647 dis = new DataInputStream(new DigestInputStream(stream, md));
648 } else {
649 dis = new DataInputStream(stream);
650 }
651
652 // Body format: see store method
653
654 int xMagic = dis.readInt();
655 int xVersion = dis.readInt();
656
657 if (xMagic!=MAGIC ||
658 (xVersion!=VERSION_1 && xVersion!=VERSION_2)) {
659 throw new IOException("Invalid keystore format");
660 }
661
662 if (xVersion == VERSION_1) {
663 cf = CertificateFactory.getInstance("X509");
664 } else {
665 // version 2
666 cfs = new Hashtable<String, CertificateFactory>(3);
667 }
668
669 entries.clear();
670 int count = dis.readInt();
671
672 for (int i = 0; i < count; i++) {
673 int tag;
674 String alias;
675
676 tag = dis.readInt();
677
678 if (tag == 1) { // private key entry
679
680 KeyEntry entry = new KeyEntry();
681
682 // Read the alias
683 alias = dis.readUTF();
684
685 // Read the (entry creation) date
686 entry.date = new Date(dis.readLong());
687
688 // Read the private key
689 entry.protectedPrivKey =
690 IOUtils.readFully(dis, dis.readInt(), true);
691
692 // Read the certificate chain
693 int numOfCerts = dis.readInt();
694 if (numOfCerts > 0) {
695 List<Certificate> certs = new ArrayList<>(
696 numOfCerts > 10 ? 10 : numOfCerts);
697 for (int j = 0; j < numOfCerts; j++) {
698 if (xVersion == 2) {
699 // read the certificate type, and instantiate a
700 // certificate factory of that type (reuse
701 // existing factory if possible)
702 String certType = dis.readUTF();
703 if (cfs.containsKey(certType)) {
704 // reuse certificate factory
705 cf = cfs.get(certType);
706 } else {
707 // create new certificate factory
708 cf = CertificateFactory.getInstance(certType);
709 // store the certificate factory so we can
710 // reuse it later
711 cfs.put(certType, cf);
712 }
713 }
714 // instantiate the certificate
715 encoded = IOUtils.readFully(dis, dis.readInt(), true);
716 bais = new ByteArrayInputStream(encoded);
717 certs.add(cf.generateCertificate(bais));
718 bais.close();
719 }
720 // We can be sure now that numOfCerts of certs are read
721 entry.chain = certs.toArray(new Certificate[numOfCerts]);
722 }
723
724 // Add the entry to the list
725 entries.put(alias, entry);
726
727 } else if (tag == 2) { // trusted certificate entry
728
729 TrustedCertEntry entry = new TrustedCertEntry();
730
731 // Read the alias
732 alias = dis.readUTF();
733
734 // Read the (entry creation) date
735 entry.date = new Date(dis.readLong());
736
737 // Read the trusted certificate
738 if (xVersion == 2) {
739 // read the certificate type, and instantiate a
740 // certificate factory of that type (reuse
741 // existing factory if possible)
742 String certType = dis.readUTF();
743 if (cfs.containsKey(certType)) {
744 // reuse certificate factory
745 cf = cfs.get(certType);
746 } else {
747 // create new certificate factory
748 cf = CertificateFactory.getInstance(certType);
749 // store the certificate factory so we can
750 // reuse it later
751 cfs.put(certType, cf);
752 }
753 }
754 encoded = IOUtils.readFully(dis, dis.readInt(), true);
755 bais = new ByteArrayInputStream(encoded);
756 entry.cert = cf.generateCertificate(bais);
757 bais.close();
758
759 // Add the entry to the list
760 entries.put(alias, entry);
761
762 } else {
763 throw new IOException("Unrecognized keystore entry");
764 }
765 }
766
767 /*
768 * If a password has been provided, we check the keyed digest
769 * at the end. If this check fails, the store has been tampered
770 * with
771 */
772 if (password != null) {
773 byte[] computed = md.digest();
774 byte[] actual = new byte[computed.length];
775 dis.readFully(actual);
776 for (int i = 0; i < computed.length; i++) {
777 if (computed[i] != actual[i]) {
778 Throwable t = new UnrecoverableKeyException
779 ("Password verification failed");
780 throw (IOException)new IOException
781 ("Keystore was tampered with, or "
782 + "password was incorrect").initCause(t);
783 }
784 }
785 }
786 }
787 }
788
789 /**
790 * To guard against tampering with the keystore, we append a keyed
791 * hash with a bit of whitener.
792 */
793 private MessageDigest getPreKeyedHash(char[] password)
794 throws NoSuchAlgorithmException, UnsupportedEncodingException
795 {
796 int i, j;
797
798 MessageDigest md = MessageDigest.getInstance("SHA");
799 byte[] passwdBytes = new byte[password.length * 2];
800 for (i=0, j=0; i<password.length; i++) {
801 passwdBytes[j++] = (byte)(password[i] >> 8);
802 passwdBytes[j++] = (byte)password[i];
803 }
804 md.update(passwdBytes);
805 for (i=0; i<passwdBytes.length; i++)
806 passwdBytes[i] = 0;
807 md.update("Mighty Aphrodite".getBytes("UTF8"));
808 return md;
809 }
810
811 /**
812 * Probe the first few bytes of the keystore data stream for a valid
813 * JKS keystore encoding.
814 */
815 @Override
816 public boolean engineProbe(InputStream stream) throws IOException {
817 DataInputStream dataStream;
818 if (stream instanceof DataInputStream) {
819 dataStream = (DataInputStream)stream;
820 } else {
821 dataStream = new DataInputStream(stream);
822 }
823
824 return MAGIC == dataStream.readInt();
825 }
826 }