1 /*
2 * Copyright (c) 2003, 2015, 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.pkcs11;
27
28 import java.security.*;
29 import java.security.spec.AlgorithmParameterSpec;
30 import java.security.spec.*;
31
32 import java.util.Locale;
33
34 import javax.crypto.*;
35 import javax.crypto.spec.*;
36
37 import static sun.security.pkcs11.TemplateManager.*;
38 import sun.security.pkcs11.wrapper.*;
39 import static sun.security.pkcs11.wrapper.PKCS11Constants.*;
40 import sun.security.internal.spec.TlsRsaPremasterSecretParameterSpec;
41 import sun.security.util.KeyUtil;
42
43 /**
44 * RSA Cipher implementation class. We currently only support
45 * PKCS#1 v1.5 padding on top of CKM_RSA_PKCS.
46 *
47 * @author Andreas Sterbenz
48 * @since 1.5
49 */
50 final class P11RSACipher extends CipherSpi {
51
52 // minimum length of PKCS#1 v1.5 padding
53 private final static int PKCS1_MIN_PADDING_LENGTH = 11;
54
55 // constant byte[] of length 0
56 private final static byte[] B0 = new byte[0];
57
58 // mode constant for public key encryption
59 private final static int MODE_ENCRYPT = 1;
60 // mode constant for private key decryption
61 private final static int MODE_DECRYPT = 2;
62 // mode constant for private key encryption (signing)
63 private final static int MODE_SIGN = 3;
64 // mode constant for public key decryption (verifying)
65 private final static int MODE_VERIFY = 4;
66
67 // padding type constant for NoPadding
68 private final static int PAD_NONE = 1;
69 // padding type constant for PKCS1Padding
70 private final static int PAD_PKCS1 = 2;
71
72 // token instance
73 private final Token token;
74
75 // algorithm name (always "RSA")
76 private final String algorithm;
77
78 // mechanism id
79 private final long mechanism;
80
81 // associated session, if any
82 private Session session;
83
84 // mode, one of MODE_* above
85 private int mode;
86
87 // padding, one of PAD_* above
88 private int padType;
89
90 private byte[] buffer;
91 private int bufOfs;
92
93 // key, if init() was called
94 private P11Key p11Key;
95
96 // flag indicating whether an operation is initialized
97 private boolean initialized;
98
99 // maximum input data size allowed
100 // for decryption, this is the length of the key
101 // for encryption, length of the key minus minimum padding length
102 private int maxInputSize;
103
104 // maximum output size. this is the length of the key
105 private int outputSize;
106
107 // cipher parameter for TLS RSA premaster secret
108 private AlgorithmParameterSpec spec = null;
109
110 // the source of randomness
111 private SecureRandom random;
112
113 P11RSACipher(Token token, String algorithm, long mechanism)
114 throws PKCS11Exception {
115 super();
116 this.token = token;
117 this.algorithm = "RSA";
118 this.mechanism = mechanism;
119 }
120
121 // modes do not make sense for RSA, but allow ECB
122 // see JCE spec
123 protected void engineSetMode(String mode) throws NoSuchAlgorithmException {
124 if (mode.equalsIgnoreCase("ECB") == false) {
125 throw new NoSuchAlgorithmException("Unsupported mode " + mode);
126 }
127 }
128
129 protected void engineSetPadding(String padding)
130 throws NoSuchPaddingException {
131 String lowerPadding = padding.toLowerCase(Locale.ENGLISH);
132 if (lowerPadding.equals("pkcs1padding")) {
133 padType = PAD_PKCS1;
134 } else if (lowerPadding.equals("nopadding")) {
135 padType = PAD_NONE;
136 } else {
137 throw new NoSuchPaddingException("Unsupported padding " + padding);
138 }
139 }
140
141 // return 0 as block size, we are not a block cipher
142 // see JCE spec
143 protected int engineGetBlockSize() {
144 return 0;
145 }
146
147 // return the output size
148 // see JCE spec
149 protected int engineGetOutputSize(int inputLen) {
150 return outputSize;
151 }
152
153 // no IV, return null
154 // see JCE spec
155 protected byte[] engineGetIV() {
156 return null;
157 }
158
159 // no parameters, return null
160 // see JCE spec
161 protected AlgorithmParameters engineGetParameters() {
162 return null;
163 }
164
165 // see JCE spec
166 protected void engineInit(int opmode, Key key, SecureRandom random)
167 throws InvalidKeyException {
168 implInit(opmode, key);
169 }
170
171 // see JCE spec
172 @SuppressWarnings("deprecation")
173 protected void engineInit(int opmode, Key key,
174 AlgorithmParameterSpec params, SecureRandom random)
175 throws InvalidKeyException, InvalidAlgorithmParameterException {
176 if (params != null) {
177 if (!(params instanceof TlsRsaPremasterSecretParameterSpec)) {
178 throw new InvalidAlgorithmParameterException(
179 "Parameters not supported");
180 }
181 spec = params;
182 this.random = random; // for TLS RSA premaster secret
183 }
184 implInit(opmode, key);
185 }
186
187 // see JCE spec
188 protected void engineInit(int opmode, Key key, AlgorithmParameters params,
189 SecureRandom random)
190 throws InvalidKeyException, InvalidAlgorithmParameterException {
191 if (params != null) {
192 throw new InvalidAlgorithmParameterException(
193 "Parameters not supported");
194 }
195 implInit(opmode, key);
196 }
197
198 private void implInit(int opmode, Key key) throws InvalidKeyException {
199 reset(true);
200 p11Key = P11KeyFactory.convertKey(token, key, algorithm);
201 boolean encrypt;
202 if (opmode == Cipher.ENCRYPT_MODE) {
203 encrypt = true;
204 } else if (opmode == Cipher.DECRYPT_MODE) {
205 encrypt = false;
206 } else if (opmode == Cipher.WRAP_MODE) {
207 if (p11Key.isPublic() == false) {
208 throw new InvalidKeyException
209 ("Wrap has to be used with public keys");
210 }
211 // No further setup needed for C_Wrap(). We'll initialize later if
212 // we can't use C_Wrap().
213 return;
214 } else if (opmode == Cipher.UNWRAP_MODE) {
215 if (p11Key.isPrivate() == false) {
216 throw new InvalidKeyException
217 ("Unwrap has to be used with private keys");
218 }
219 // No further setup needed for C_Unwrap(). We'll initialize later
220 // if we can't use C_Unwrap().
221 return;
222 } else {
223 throw new InvalidKeyException("Unsupported mode: " + opmode);
224 }
225 if (p11Key.isPublic()) {
226 mode = encrypt ? MODE_ENCRYPT : MODE_VERIFY;
227 } else if (p11Key.isPrivate()) {
228 mode = encrypt ? MODE_SIGN : MODE_DECRYPT;
229 } else {
230 throw new InvalidKeyException("Unknown key type: " + p11Key);
231 }
232 int n = (p11Key.length() + 7) >> 3;
233 outputSize = n;
234 buffer = new byte[n];
235 maxInputSize = ((padType == PAD_PKCS1 && encrypt) ?
236 (n - PKCS1_MIN_PADDING_LENGTH) : n);
237 try {
238 ensureInitialized();
239 } catch (PKCS11Exception e) {
240 throw new InvalidKeyException("init() failed", e);
241 }
242 }
243
244 // reset the states to the pre-initialized values
245 private void reset(boolean doCancel) {
246 if (!initialized) {
247 return;
248 }
249 initialized = false;
250 try {
251 if (session == null) {
252 return;
253 }
254 if (doCancel && token.explicitCancel) {
255 cancelOperation();
256 }
257 } finally {
258 p11Key.decNativeKeyRef();
259 session = token.releaseSession(session);
260 }
261 }
262
263 private void cancelOperation() {
264 token.ensureValid();
265 if (session.hasObjects() == false) {
266 session = token.killSession(session);
267 return;
268 } else {
269 try {
270 PKCS11 p11 = token.p11;
271 int inLen = maxInputSize;
272 int outLen = buffer.length;
273 switch (mode) {
274 case MODE_ENCRYPT:
275 p11.C_Encrypt(session.id(), buffer, 0, inLen, buffer, 0,
276 outLen);
277 break;
278 case MODE_DECRYPT:
279 p11.C_Decrypt(session.id(), buffer, 0, inLen, buffer, 0,
280 outLen);
281 break;
282 case MODE_SIGN:
283 byte[] tmpBuffer = new byte[maxInputSize];
284 p11.C_Sign
285 (session.id(), tmpBuffer);
286 break;
287 case MODE_VERIFY:
288 p11.C_VerifyRecover(session.id(), buffer, 0, inLen, buffer,
289 0, outLen);
290 break;
291 default:
292 throw new ProviderException("internal error");
293 }
294 } catch (PKCS11Exception e) {
295 // XXX ensure this always works, ignore error
296 }
297 }
298 }
299
300 private void ensureInitialized() throws PKCS11Exception {
301 if (initialized) {
302 return;
303 }
304 if (p11Key == null) {
305 throw new ProviderException(
306 "Operation cannot be performed without " +
307 "calling engineInit first");
308 }
309 token.ensureValid();
310 p11Key.incNativeKeyRef();
311 try {
312 if (session == null) {
313 session = token.getOpSession();
314 }
315 PKCS11 p11 = token.p11;
316 CK_MECHANISM ckMechanism = new CK_MECHANISM(mechanism);
317 switch (mode) {
318 case MODE_ENCRYPT:
319 p11.C_EncryptInit(session.id(), ckMechanism, p11Key.keyID);
320 break;
321 case MODE_DECRYPT:
322 p11.C_DecryptInit(session.id(), ckMechanism, p11Key.keyID);
323 break;
324 case MODE_SIGN:
325 p11.C_SignInit(session.id(), ckMechanism, p11Key.keyID);
326 break;
327 case MODE_VERIFY:
328 p11.C_VerifyRecoverInit(session.id(), ckMechanism,
329 p11Key.keyID);
330 break;
331 default:
332 throw new AssertionError("internal error");
333 }
334 } catch (Throwable t) {
335 p11Key.decNativeKeyRef();
336 session = token.releaseSession(session);
337 throw t;
338 }
339 initialized = true;
340 bufOfs = 0;
341 }
342
343 private void implUpdate(byte[] in, int inOfs, int inLen) {
344 try {
345 ensureInitialized();
346 } catch (PKCS11Exception e) {
347 throw new ProviderException("update() failed", e);
348 }
349 if ((inLen == 0) || (in == null)) {
350 return;
351 }
352 if (bufOfs + inLen > maxInputSize) {
353 bufOfs = maxInputSize + 1;
354 return;
355 }
356 System.arraycopy(in, inOfs, buffer, bufOfs, inLen);
357 bufOfs += inLen;
358 }
359
360 private int implDoFinal(byte[] out, int outOfs, int outLen)
361 throws BadPaddingException, IllegalBlockSizeException {
362 if (bufOfs > maxInputSize) {
363 throw new IllegalBlockSizeException("Data must not be longer "
364 + "than " + maxInputSize + " bytes");
365 }
366 try {
367 ensureInitialized();
368 PKCS11 p11 = token.p11;
369 int n;
370 switch (mode) {
371 case MODE_ENCRYPT:
372 n = p11.C_Encrypt
373 (session.id(), buffer, 0, bufOfs, out, outOfs, outLen);
374 break;
375 case MODE_DECRYPT:
376 n = p11.C_Decrypt
377 (session.id(), buffer, 0, bufOfs, out, outOfs, outLen);
378 break;
379 case MODE_SIGN:
380 byte[] tmpBuffer = new byte[bufOfs];
381 System.arraycopy(buffer, 0, tmpBuffer, 0, bufOfs);
382 tmpBuffer = p11.C_Sign(session.id(), tmpBuffer);
383 if (tmpBuffer.length > outLen) {
384 throw new BadPaddingException(
385 "Output buffer (" + outLen + ") is too small to " +
386 "hold the produced data (" + tmpBuffer.length + ")");
387 }
388 System.arraycopy(tmpBuffer, 0, out, outOfs, tmpBuffer.length);
389 n = tmpBuffer.length;
390 break;
391 case MODE_VERIFY:
392 n = p11.C_VerifyRecover
393 (session.id(), buffer, 0, bufOfs, out, outOfs, outLen);
394 break;
395 default:
396 throw new ProviderException("internal error");
397 }
398 return n;
399 } catch (PKCS11Exception e) {
400 throw (BadPaddingException)new BadPaddingException
401 ("doFinal() failed").initCause(e);
402 } finally {
403 reset(false);
404 }
405 }
406
407 // see JCE spec
408 protected byte[] engineUpdate(byte[] in, int inOfs, int inLen) {
409 implUpdate(in, inOfs, inLen);
410 return B0;
411 }
412
413 // see JCE spec
414 protected int engineUpdate(byte[] in, int inOfs, int inLen,
415 byte[] out, int outOfs) throws ShortBufferException {
416 implUpdate(in, inOfs, inLen);
417 return 0;
418 }
419
420 // see JCE spec
421 protected byte[] engineDoFinal(byte[] in, int inOfs, int inLen)
422 throws IllegalBlockSizeException, BadPaddingException {
423 implUpdate(in, inOfs, inLen);
424 int n = implDoFinal(buffer, 0, buffer.length);
425 byte[] out = new byte[n];
426 System.arraycopy(buffer, 0, out, 0, n);
427 return out;
428 }
429
430 // see JCE spec
431 protected int engineDoFinal(byte[] in, int inOfs, int inLen,
432 byte[] out, int outOfs) throws ShortBufferException,
433 IllegalBlockSizeException, BadPaddingException {
434 implUpdate(in, inOfs, inLen);
435 return implDoFinal(out, outOfs, out.length - outOfs);
436 }
437
438 private byte[] doFinal() throws BadPaddingException,
439 IllegalBlockSizeException {
440 byte[] t = new byte[2048];
441 int n = implDoFinal(t, 0, t.length);
442 byte[] out = new byte[n];
443 System.arraycopy(t, 0, out, 0, n);
444 return out;
445 }
446
447 // see JCE spec
448 protected byte[] engineWrap(Key key) throws InvalidKeyException,
449 IllegalBlockSizeException {
450 String keyAlg = key.getAlgorithm();
451 P11Key sKey = null;
452 try {
453 // The conversion may fail, e.g. trying to wrap an AES key on
454 // a token that does not support AES, or when the key size is
455 // not within the range supported by the token.
456 sKey = P11SecretKeyFactory.convertKey(token, key, keyAlg);
457 } catch (InvalidKeyException ike) {
458 byte[] toBeWrappedKey = key.getEncoded();
459 if (toBeWrappedKey == null) {
460 throw new InvalidKeyException
461 ("wrap() failed, no encoding available", ike);
462 }
463 // Directly encrypt the key encoding when key conversion failed
464 implInit(Cipher.ENCRYPT_MODE, p11Key);
465 implUpdate(toBeWrappedKey, 0, toBeWrappedKey.length);
466 try {
467 return doFinal();
468 } catch (BadPaddingException bpe) {
469 // should not occur
470 throw new InvalidKeyException("wrap() failed", bpe);
471 } finally {
472 // Restore original mode
473 implInit(Cipher.WRAP_MODE, p11Key);
474 }
475 }
476 Session s = null;
477 try {
478 s = token.getOpSession();
479 p11Key.incNativeKeyRef();
480 sKey.incNativeKeyRef();
481 return token.p11.C_WrapKey(s.id(), new CK_MECHANISM(mechanism),
482 p11Key.keyID, sKey.keyID);
483 } catch (PKCS11Exception e) {
484 throw new InvalidKeyException("wrap() failed", e);
485 } finally {
486 p11Key.decNativeKeyRef();
487 sKey.decNativeKeyRef();
488 token.releaseSession(s);
489 }
490 }
491
492 // see JCE spec
493 @SuppressWarnings("deprecation")
494 protected Key engineUnwrap(byte[] wrappedKey, String algorithm,
495 int type) throws InvalidKeyException, NoSuchAlgorithmException {
496
497 boolean isTlsRsaPremasterSecret =
498 algorithm.equals("TlsRsaPremasterSecret");
499 Exception failover = null;
500
501 // Should C_Unwrap be preferred for non-TLS RSA premaster secret?
502 if (token.supportsRawSecretKeyImport()) {
503 // XXX implement unwrap using C_Unwrap() for all keys
504 implInit(Cipher.DECRYPT_MODE, p11Key);
505 try {
506 if (wrappedKey.length > maxInputSize) {
507 throw new InvalidKeyException("Key is too long for unwrapping");
508 }
509
510 byte[] encoded = null;
511 implUpdate(wrappedKey, 0, wrappedKey.length);
512 try {
513 encoded = doFinal();
514 } catch (BadPaddingException e) {
515 if (isTlsRsaPremasterSecret) {
516 failover = e;
517 } else {
518 throw new InvalidKeyException("Unwrapping failed", e);
519 }
520 } catch (IllegalBlockSizeException e) {
521 // should not occur, handled with length check above
522 throw new InvalidKeyException("Unwrapping failed", e);
523 }
524
525 if (isTlsRsaPremasterSecret) {
526 if (!(spec instanceof TlsRsaPremasterSecretParameterSpec)) {
527 throw new IllegalStateException(
528 "No TlsRsaPremasterSecretParameterSpec specified");
529 }
530
531 // polish the TLS premaster secret
532 TlsRsaPremasterSecretParameterSpec psps =
533 (TlsRsaPremasterSecretParameterSpec)spec;
534 encoded = KeyUtil.checkTlsPreMasterSecretKey(
535 psps.getClientVersion(), psps.getServerVersion(),
536 random, encoded, (failover != null));
537 }
538
539 return ConstructKeys.constructKey(encoded, algorithm, type);
540 } finally {
541 // Restore original mode
542 implInit(Cipher.UNWRAP_MODE, p11Key);
543 }
544 } else {
545 Session s = null;
546 SecretKey secretKey = null;
547 try {
548 try {
549 s = token.getObjSession();
550 long keyType = CKK_GENERIC_SECRET;
551 CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] {
552 new CK_ATTRIBUTE(CKA_CLASS, CKO_SECRET_KEY),
553 new CK_ATTRIBUTE(CKA_KEY_TYPE, keyType),
554 };
555 attributes = token.getAttributes(
556 O_IMPORT, CKO_SECRET_KEY, keyType, attributes);
557 p11Key.incNativeKeyRef();
558 long keyID;
559 try {
560 keyID = token.p11.C_UnwrapKey(s.id(),
561 new CK_MECHANISM(mechanism), p11Key.keyID,
562 wrappedKey, attributes);
563 } finally {
564 p11Key.decNativeKeyRef();
565 }
566 secretKey = P11Key.secretKey(s, keyID,
567 algorithm, 48 << 3, attributes, true);
568 } catch (PKCS11Exception e) {
569 if (isTlsRsaPremasterSecret) {
570 failover = e;
571 } else {
572 throw new InvalidKeyException("unwrap() failed", e);
573 }
574 }
575
576 if (isTlsRsaPremasterSecret) {
577 TlsRsaPremasterSecretParameterSpec psps =
578 (TlsRsaPremasterSecretParameterSpec)spec;
579
580 // Please use the tricky failover as the parameter so that
581 // smart compiler won't dispose the unused variable.
582 secretKey = polishPreMasterSecretKey(token, s,
583 failover, secretKey,
584 psps.getClientVersion(), psps.getServerVersion());
585 }
586
587 return secretKey;
588 } finally {
589 token.releaseSession(s);
590 }
591 }
592 }
593
594 // see JCE spec
595 protected int engineGetKeySize(Key key) throws InvalidKeyException {
596 int n = P11KeyFactory.convertKey(token, key, algorithm).length();
597 return n;
598 }
599
600 private static SecretKey polishPreMasterSecretKey(
601 Token token, Session session,
602 Exception failover, SecretKey unwrappedKey,
603 int clientVersion, int serverVersion) {
604
605 SecretKey newKey;
606 CK_VERSION version = new CK_VERSION(
607 (clientVersion >>> 8) & 0xFF, clientVersion & 0xFF);
608 try {
609 CK_ATTRIBUTE[] attributes = token.getAttributes(
610 O_GENERATE, CKO_SECRET_KEY,
611 CKK_GENERIC_SECRET, new CK_ATTRIBUTE[0]);
612 long keyID = token.p11.C_GenerateKey(session.id(),
613 new CK_MECHANISM(CKM_SSL3_PRE_MASTER_KEY_GEN, version),
614 attributes);
615 newKey = P11Key.secretKey(session, keyID,
616 "TlsRsaPremasterSecret", 48 << 3, attributes, true);
617 } catch (PKCS11Exception e) {
618 throw new ProviderException(
619 "Could not generate premaster secret", e);
620 }
621
622 return (failover == null) ? unwrappedKey : newKey;
623 }
624
625 }
626
627 final class ConstructKeys {
628 /**
629 * Construct a public key from its encoding.
630 *
631 * @param encodedKey the encoding of a public key.
632 *
633 * @param encodedKeyAlgorithm the algorithm the encodedKey is for.
634 *
635 * @return a public key constructed from the encodedKey.
636 */
637 private static final PublicKey constructPublicKey(byte[] encodedKey,
638 String encodedKeyAlgorithm)
639 throws InvalidKeyException, NoSuchAlgorithmException {
640 try {
641 KeyFactory keyFactory =
642 KeyFactory.getInstance(encodedKeyAlgorithm);
643 X509EncodedKeySpec keySpec = new X509EncodedKeySpec(encodedKey);
644 return keyFactory.generatePublic(keySpec);
645 } catch (NoSuchAlgorithmException nsae) {
646 throw new NoSuchAlgorithmException("No installed providers " +
647 "can create keys for the " +
648 encodedKeyAlgorithm +
649 "algorithm", nsae);
650 } catch (InvalidKeySpecException ike) {
651 throw new InvalidKeyException("Cannot construct public key", ike);
652 }
653 }
654
655 /**
656 * Construct a private key from its encoding.
657 *
658 * @param encodedKey the encoding of a private key.
659 *
660 * @param encodedKeyAlgorithm the algorithm the wrapped key is for.
661 *
662 * @return a private key constructed from the encodedKey.
663 */
664 private static final PrivateKey constructPrivateKey(byte[] encodedKey,
665 String encodedKeyAlgorithm) throws InvalidKeyException,
666 NoSuchAlgorithmException {
667 try {
668 KeyFactory keyFactory =
669 KeyFactory.getInstance(encodedKeyAlgorithm);
670 PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encodedKey);
671 return keyFactory.generatePrivate(keySpec);
672 } catch (NoSuchAlgorithmException nsae) {
673 throw new NoSuchAlgorithmException("No installed providers " +
674 "can create keys for the " +
675 encodedKeyAlgorithm +
676 "algorithm", nsae);
677 } catch (InvalidKeySpecException ike) {
678 throw new InvalidKeyException("Cannot construct private key", ike);
679 }
680 }
681
682 /**
683 * Construct a secret key from its encoding.
684 *
685 * @param encodedKey the encoding of a secret key.
686 *
687 * @param encodedKeyAlgorithm the algorithm the secret key is for.
688 *
689 * @return a secret key constructed from the encodedKey.
690 */
691 private static final SecretKey constructSecretKey(byte[] encodedKey,
692 String encodedKeyAlgorithm) {
693 return new SecretKeySpec(encodedKey, encodedKeyAlgorithm);
694 }
695
696 static final Key constructKey(byte[] encoding, String keyAlgorithm,
697 int keyType) throws InvalidKeyException, NoSuchAlgorithmException {
698 switch (keyType) {
699 case Cipher.SECRET_KEY:
700 return constructSecretKey(encoding, keyAlgorithm);
701 case Cipher.PRIVATE_KEY:
702 return constructPrivateKey(encoding, keyAlgorithm);
703 case Cipher.PUBLIC_KEY:
704 return constructPublicKey(encoding, keyAlgorithm);
705 default:
706 throw new InvalidKeyException("Unknown keytype " + keyType);
707 }
708 }
709 }