1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.codec.digest;
19
20 import java.io.IOException;
21 import java.io.InputStream;
22 import java.security.MessageDigest;
23 import java.security.NoSuchAlgorithmException;
24
25 import org.apache.commons.codec.binary.Hex;
26 import org.apache.commons.codec.binary.StringUtils;
27
28 /**
29 * Operations to simplify common {@link java.security.MessageDigest} tasks.
30 * This class is immutable and thread-safe.
31 *
32 * @version $Id: DigestUtils.html 891688 2013-12-24 20:49:46Z ggregory $
33 */
34 public class DigestUtils {
35
36 private static final int STREAM_BUFFER_LENGTH = 1024;
37
38 /**
39 * Read through an InputStream and returns the digest for the data
40 *
41 * @param digest
42 * The MessageDigest to use (e.g. MD5)
43 * @param data
44 * Data to digest
45 * @return the digest
46 * @throws IOException
47 * On error reading from the stream
48 */
49 private static byte[] digest(final MessageDigest digest, final InputStream data) throws IOException {
50 return updateDigest(digest, data).digest();
51 }
52
53 /**
54 * Returns a <code>MessageDigest</code> for the given <code>algorithm</code>.
55 *
56 * @param algorithm
57 * the name of the algorithm requested. See <a
58 * href="http://java.sun.com/j2se/1.3/docs/guide/security/CryptoSpec.html#AppA">Appendix A in the Java
59 * Cryptography Architecture API Specification & Reference</a> for information about standard algorithm
60 * names.
61 * @return A digest instance.
62 * @see MessageDigest#getInstance(String)
63 * @throws IllegalArgumentException
64 * when a {@link NoSuchAlgorithmException} is caught.
65 */
66 public static MessageDigest getDigest(final String algorithm) {
67 try {
68 return MessageDigest.getInstance(algorithm);
69 } catch (final NoSuchAlgorithmException e) {
70 throw new IllegalArgumentException(e);
71 }
72 }
73
74 /**
75 * Returns an MD2 MessageDigest.
76 *
77 * @return An MD2 digest instance.
78 * @throws IllegalArgumentException
79 * when a {@link NoSuchAlgorithmException} is caught, which should never happen because MD2 is a
80 * built-in algorithm
81 * @see MessageDigestAlgorithms#MD2
82 * @since 1.7
83 */
84 public static MessageDigest getMd2Digest() {
85 return getDigest(MessageDigestAlgorithms.MD2);
86 }
87
88 /**
89 * Returns an MD5 MessageDigest.
90 *
91 * @return An MD5 digest instance.
92 * @throws IllegalArgumentException
93 * when a {@link NoSuchAlgorithmException} is caught, which should never happen because MD5 is a
94 * built-in algorithm
95 * @see MessageDigestAlgorithms#MD5
96 */
97 public static MessageDigest getMd5Digest() {
98 return getDigest(MessageDigestAlgorithms.MD5);
99 }
100
101 /**
102 * Returns an SHA-1 digest.
103 *
104 * @return An SHA-1 digest instance.
105 * @throws IllegalArgumentException
106 * when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-1 is a
107 * built-in algorithm
108 * @see MessageDigestAlgorithms#SHA_1
109 * @since 1.7
110 */
111 public static MessageDigest getSha1Digest() {
112 return getDigest(MessageDigestAlgorithms.SHA_1);
113 }
114
115 /**
116 * Returns an SHA-256 digest.
117 * <p>
118 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
119 * </p>
120 *
121 * @return An SHA-256 digest instance.
122 * @throws IllegalArgumentException
123 * when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-256 is a
124 * built-in algorithm
125 * @see MessageDigestAlgorithms#SHA_256
126 */
127 public static MessageDigest getSha256Digest() {
128 return getDigest(MessageDigestAlgorithms.SHA_256);
129 }
130
131 /**
132 * Returns an SHA-384 digest.
133 * <p>
134 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
135 * </p>
136 *
137 * @return An SHA-384 digest instance.
138 * @throws IllegalArgumentException
139 * when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-384 is a
140 * built-in algorithm
141 * @see MessageDigestAlgorithms#SHA_384
142 */
143 public static MessageDigest getSha384Digest() {
144 return getDigest(MessageDigestAlgorithms.SHA_384);
145 }
146
147 /**
148 * Returns an SHA-512 digest.
149 * <p>
150 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
151 * </p>
152 *
153 * @return An SHA-512 digest instance.
154 * @throws IllegalArgumentException
155 * when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-512 is a
156 * built-in algorithm
157 * @see MessageDigestAlgorithms#SHA_512
158 */
159 public static MessageDigest getSha512Digest() {
160 return getDigest(MessageDigestAlgorithms.SHA_512);
161 }
162
163 /**
164 * Returns an SHA-1 digest.
165 *
166 * @return An SHA-1 digest instance.
167 * @throws IllegalArgumentException
168 * when a {@link NoSuchAlgorithmException} is caught
169 * @deprecated Use {@link #getSha1Digest()}
170 */
171 @Deprecated
172 public static MessageDigest getShaDigest() {
173 return getSha1Digest();
174 }
175
176 /**
177 * Calculates the MD2 digest and returns the value as a 16 element <code>byte[]</code>.
178 *
179 * @param data
180 * Data to digest
181 * @return MD2 digest
182 * @since 1.7
183 */
184 public static byte[] md2(final byte[] data) {
185 return getMd2Digest().digest(data);
186 }
187
188 /**
189 * Calculates the MD2 digest and returns the value as a 16 element <code>byte[]</code>.
190 *
191 * @param data
192 * Data to digest
193 * @return MD2 digest
194 * @throws IOException
195 * On error reading from the stream
196 * @since 1.7
197 */
198 public static byte[] md2(final InputStream data) throws IOException {
199 return digest(getMd2Digest(), data);
200 }
201
202 /**
203 * Calculates the MD2 digest and returns the value as a 16 element <code>byte[]</code>.
204 *
205 * @param data
206 * Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
207 * @return MD2 digest
208 * @since 1.7
209 */
210 public static byte[] md2(final String data) {
211 return md2(StringUtils.getBytesUtf8(data));
212 }
213
214 /**
215 * Calculates the MD2 digest and returns the value as a 32 character hex string.
216 *
217 * @param data
218 * Data to digest
219 * @return MD2 digest as a hex string
220 * @since 1.7
221 */
222 public static String md2Hex(final byte[] data) {
223 return Hex.encodeHexString(md2(data));
224 }
225
226 /**
227 * Calculates the MD2 digest and returns the value as a 32 character hex string.
228 *
229 * @param data
230 * Data to digest
231 * @return MD2 digest as a hex string
232 * @throws IOException
233 * On error reading from the stream
234 * @since 1.7
235 */
236 public static String md2Hex(final InputStream data) throws IOException {
237 return Hex.encodeHexString(md2(data));
238 }
239
240 /**
241 * Calculates the MD2 digest and returns the value as a 32 character hex string.
242 *
243 * @param data
244 * Data to digest
245 * @return MD2 digest as a hex string
246 * @since 1.7
247 */
248 public static String md2Hex(final String data) {
249 return Hex.encodeHexString(md2(data));
250 }
251
252 /**
253 * Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
254 *
255 * @param data
256 * Data to digest
257 * @return MD5 digest
258 */
259 public static byte[] md5(final byte[] data) {
260 return getMd5Digest().digest(data);
261 }
262
263 /**
264 * Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
265 *
266 * @param data
267 * Data to digest
268 * @return MD5 digest
269 * @throws IOException
270 * On error reading from the stream
271 * @since 1.4
272 */
273 public static byte[] md5(final InputStream data) throws IOException {
274 return digest(getMd5Digest(), data);
275 }
276
277 /**
278 * Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
279 *
280 * @param data
281 * Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
282 * @return MD5 digest
283 */
284 public static byte[] md5(final String data) {
285 return md5(StringUtils.getBytesUtf8(data));
286 }
287
288 /**
289 * Calculates the MD5 digest and returns the value as a 32 character hex string.
290 *
291 * @param data
292 * Data to digest
293 * @return MD5 digest as a hex string
294 */
295 public static String md5Hex(final byte[] data) {
296 return Hex.encodeHexString(md5(data));
297 }
298
299 /**
300 * Calculates the MD5 digest and returns the value as a 32 character hex string.
301 *
302 * @param data
303 * Data to digest
304 * @return MD5 digest as a hex string
305 * @throws IOException
306 * On error reading from the stream
307 * @since 1.4
308 */
309 public static String md5Hex(final InputStream data) throws IOException {
310 return Hex.encodeHexString(md5(data));
311 }
312
313 /**
314 * Calculates the MD5 digest and returns the value as a 32 character hex string.
315 *
316 * @param data
317 * Data to digest
318 * @return MD5 digest as a hex string
319 */
320 public static String md5Hex(final String data) {
321 return Hex.encodeHexString(md5(data));
322 }
323
324 /**
325 * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
326 *
327 * @param data
328 * Data to digest
329 * @return SHA-1 digest
330 * @deprecated Use {@link #sha1(byte[])}
331 */
332 @Deprecated
333 public static byte[] sha(final byte[] data) {
334 return sha1(data);
335 }
336
337 /**
338 * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
339 *
340 * @param data
341 * Data to digest
342 * @return SHA-1 digest
343 * @throws IOException
344 * On error reading from the stream
345 * @since 1.4
346 * @deprecated Use {@link #sha1(InputStream)}
347 */
348 @Deprecated
349 public static byte[] sha(final InputStream data) throws IOException {
350 return sha1(data);
351 }
352
353 /**
354 * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
355 *
356 * @param data
357 * Data to digest
358 * @return SHA-1 digest
359 * @deprecated Use {@link #sha1(String)}
360 */
361 @Deprecated
362 public static byte[] sha(final String data) {
363 return sha1(data);
364 }
365
366 /**
367 * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
368 *
369 * @param data
370 * Data to digest
371 * @return SHA-1 digest
372 * @since 1.7
373 */
374 public static byte[] sha1(final byte[] data) {
375 return getSha1Digest().digest(data);
376 }
377
378 /**
379 * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
380 *
381 * @param data
382 * Data to digest
383 * @return SHA-1 digest
384 * @throws IOException
385 * On error reading from the stream
386 * @since 1.7
387 */
388 public static byte[] sha1(final InputStream data) throws IOException {
389 return digest(getSha1Digest(), data);
390 }
391
392 /**
393 * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
394 *
395 * @param data
396 * Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
397 * @return SHA-1 digest
398 */
399 public static byte[] sha1(final String data) {
400 return sha1(StringUtils.getBytesUtf8(data));
401 }
402
403 /**
404 * Calculates the SHA-1 digest and returns the value as a hex string.
405 *
406 * @param data
407 * Data to digest
408 * @return SHA-1 digest as a hex string
409 * @since 1.7
410 */
411 public static String sha1Hex(final byte[] data) {
412 return Hex.encodeHexString(sha1(data));
413 }
414
415 /**
416 * Calculates the SHA-1 digest and returns the value as a hex string.
417 *
418 * @param data
419 * Data to digest
420 * @return SHA-1 digest as a hex string
421 * @throws IOException
422 * On error reading from the stream
423 * @since 1.7
424 */
425 public static String sha1Hex(final InputStream data) throws IOException {
426 return Hex.encodeHexString(sha1(data));
427 }
428
429 /**
430 * Calculates the SHA-1 digest and returns the value as a hex string.
431 *
432 * @param data
433 * Data to digest
434 * @return SHA-1 digest as a hex string
435 * @since 1.7
436 */
437 public static String sha1Hex(final String data) {
438 return Hex.encodeHexString(sha1(data));
439 }
440
441 /**
442 * Calculates the SHA-256 digest and returns the value as a <code>byte[]</code>.
443 * <p>
444 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
445 * </p>
446 *
447 * @param data
448 * Data to digest
449 * @return SHA-256 digest
450 * @since 1.4
451 */
452 public static byte[] sha256(final byte[] data) {
453 return getSha256Digest().digest(data);
454 }
455
456 /**
457 * Calculates the SHA-256 digest and returns the value as a <code>byte[]</code>.
458 * <p>
459 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
460 * </p>
461 *
462 * @param data
463 * Data to digest
464 * @return SHA-256 digest
465 * @throws IOException
466 * On error reading from the stream
467 * @since 1.4
468 */
469 public static byte[] sha256(final InputStream data) throws IOException {
470 return digest(getSha256Digest(), data);
471 }
472
473 /**
474 * Calculates the SHA-256 digest and returns the value as a <code>byte[]</code>.
475 * <p>
476 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
477 * </p>
478 *
479 * @param data
480 * Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
481 * @return SHA-256 digest
482 * @since 1.4
483 */
484 public static byte[] sha256(final String data) {
485 return sha256(StringUtils.getBytesUtf8(data));
486 }
487
488 /**
489 * Calculates the SHA-256 digest and returns the value as a hex string.
490 * <p>
491 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
492 * </p>
493 *
494 * @param data
495 * Data to digest
496 * @return SHA-256 digest as a hex string
497 * @since 1.4
498 */
499 public static String sha256Hex(final byte[] data) {
500 return Hex.encodeHexString(sha256(data));
501 }
502
503 /**
504 * Calculates the SHA-256 digest and returns the value as a hex string.
505 * <p>
506 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
507 * </p>
508 *
509 * @param data
510 * Data to digest
511 * @return SHA-256 digest as a hex string
512 * @throws IOException
513 * On error reading from the stream
514 * @since 1.4
515 */
516 public static String sha256Hex(final InputStream data) throws IOException {
517 return Hex.encodeHexString(sha256(data));
518 }
519
520 /**
521 * Calculates the SHA-256 digest and returns the value as a hex string.
522 * <p>
523 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
524 * </p>
525 *
526 * @param data
527 * Data to digest
528 * @return SHA-256 digest as a hex string
529 * @since 1.4
530 */
531 public static String sha256Hex(final String data) {
532 return Hex.encodeHexString(sha256(data));
533 }
534
535 /**
536 * Calculates the SHA-384 digest and returns the value as a <code>byte[]</code>.
537 * <p>
538 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
539 * </p>
540 *
541 * @param data
542 * Data to digest
543 * @return SHA-384 digest
544 * @since 1.4
545 */
546 public static byte[] sha384(final byte[] data) {
547 return getSha384Digest().digest(data);
548 }
549
550 /**
551 * Calculates the SHA-384 digest and returns the value as a <code>byte[]</code>.
552 * <p>
553 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
554 * </p>
555 *
556 * @param data
557 * Data to digest
558 * @return SHA-384 digest
559 * @throws IOException
560 * On error reading from the stream
561 * @since 1.4
562 */
563 public static byte[] sha384(final InputStream data) throws IOException {
564 return digest(getSha384Digest(), data);
565 }
566
567 /**
568 * Calculates the SHA-384 digest and returns the value as a <code>byte[]</code>.
569 * <p>
570 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
571 * </p>
572 *
573 * @param data
574 * Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
575 * @return SHA-384 digest
576 * @since 1.4
577 */
578 public static byte[] sha384(final String data) {
579 return sha384(StringUtils.getBytesUtf8(data));
580 }
581
582 /**
583 * Calculates the SHA-384 digest and returns the value as a hex string.
584 * <p>
585 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
586 * </p>
587 *
588 * @param data
589 * Data to digest
590 * @return SHA-384 digest as a hex string
591 * @since 1.4
592 */
593 public static String sha384Hex(final byte[] data) {
594 return Hex.encodeHexString(sha384(data));
595 }
596
597 /**
598 * Calculates the SHA-384 digest and returns the value as a hex string.
599 * <p>
600 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
601 * </p>
602 *
603 * @param data
604 * Data to digest
605 * @return SHA-384 digest as a hex string
606 * @throws IOException
607 * On error reading from the stream
608 * @since 1.4
609 */
610 public static String sha384Hex(final InputStream data) throws IOException {
611 return Hex.encodeHexString(sha384(data));
612 }
613
614 /**
615 * Calculates the SHA-384 digest and returns the value as a hex string.
616 * <p>
617 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
618 * </p>
619 *
620 * @param data
621 * Data to digest
622 * @return SHA-384 digest as a hex string
623 * @since 1.4
624 */
625 public static String sha384Hex(final String data) {
626 return Hex.encodeHexString(sha384(data));
627 }
628
629 /**
630 * Calculates the SHA-512 digest and returns the value as a <code>byte[]</code>.
631 * <p>
632 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
633 * </p>
634 *
635 * @param data
636 * Data to digest
637 * @return SHA-512 digest
638 * @since 1.4
639 */
640 public static byte[] sha512(final byte[] data) {
641 return getSha512Digest().digest(data);
642 }
643
644 /**
645 * Calculates the SHA-512 digest and returns the value as a <code>byte[]</code>.
646 * <p>
647 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
648 * </p>
649 *
650 * @param data
651 * Data to digest
652 * @return SHA-512 digest
653 * @throws IOException
654 * On error reading from the stream
655 * @since 1.4
656 */
657 public static byte[] sha512(final InputStream data) throws IOException {
658 return digest(getSha512Digest(), data);
659 }
660
661 /**
662 * Calculates the SHA-512 digest and returns the value as a <code>byte[]</code>.
663 * <p>
664 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
665 * </p>
666 *
667 * @param data
668 * Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
669 * @return SHA-512 digest
670 * @since 1.4
671 */
672 public static byte[] sha512(final String data) {
673 return sha512(StringUtils.getBytesUtf8(data));
674 }
675
676 /**
677 * Calculates the SHA-512 digest and returns the value as a hex string.
678 * <p>
679 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
680 * </p>
681 *
682 * @param data
683 * Data to digest
684 * @return SHA-512 digest as a hex string
685 * @since 1.4
686 */
687 public static String sha512Hex(final byte[] data) {
688 return Hex.encodeHexString(sha512(data));
689 }
690
691 /**
692 * Calculates the SHA-512 digest and returns the value as a hex string.
693 * <p>
694 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
695 * </p>
696 *
697 * @param data
698 * Data to digest
699 * @return SHA-512 digest as a hex string
700 * @throws IOException
701 * On error reading from the stream
702 * @since 1.4
703 */
704 public static String sha512Hex(final InputStream data) throws IOException {
705 return Hex.encodeHexString(sha512(data));
706 }
707
708 /**
709 * Calculates the SHA-512 digest and returns the value as a hex string.
710 * <p>
711 * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
712 * </p>
713 *
714 * @param data
715 * Data to digest
716 * @return SHA-512 digest as a hex string
717 * @since 1.4
718 */
719 public static String sha512Hex(final String data) {
720 return Hex.encodeHexString(sha512(data));
721 }
722
723 /**
724 * Calculates the SHA-1 digest and returns the value as a hex string.
725 *
726 * @param data
727 * Data to digest
728 * @return SHA-1 digest as a hex string
729 * @deprecated Use {@link #sha1Hex(byte[])}
730 */
731 @Deprecated
732 public static String shaHex(final byte[] data) {
733 return sha1Hex(data);
734 }
735
736 /**
737 * Calculates the SHA-1 digest and returns the value as a hex string.
738 *
739 * @param data
740 * Data to digest
741 * @return SHA-1 digest as a hex string
742 * @throws IOException
743 * On error reading from the stream
744 * @since 1.4
745 * @deprecated Use {@link #sha1Hex(InputStream)}
746 */
747 @Deprecated
748 public static String shaHex(final InputStream data) throws IOException {
749 return sha1Hex(data);
750 }
751
752 /**
753 * Calculates the SHA-1 digest and returns the value as a hex string.
754 *
755 * @param data
756 * Data to digest
757 * @return SHA-1 digest as a hex string
758 * @deprecated Use {@link #sha1Hex(String)}
759 */
760 @Deprecated
761 public static String shaHex(final String data) {
762 return sha1Hex(data);
763 }
764
765 /**
766 * Updates the given {@link MessageDigest}.
767 *
768 * @param messageDigest
769 * the {@link MessageDigest} to update
770 * @param valueToDigest
771 * the value to update the {@link MessageDigest} with
772 * @return the updated {@link MessageDigest}
773 * @since 1.7
774 */
775 public static MessageDigest updateDigest(final MessageDigest messageDigest, final byte[] valueToDigest) {
776 messageDigest.update(valueToDigest);
777 return messageDigest;
778 }
779
780 /**
781 * Reads through an InputStream and updates the digest for the data
782 *
783 * @param digest
784 * The MessageDigest to use (e.g. MD5)
785 * @param data
786 * Data to digest
787 * @return the digest
788 * @throws IOException
789 * On error reading from the stream
790 * @since 1.8
791 */
792 public static MessageDigest updateDigest(final MessageDigest digest, final InputStream data) throws IOException {
793 final byte[] buffer = new byte[STREAM_BUFFER_LENGTH];
794 int read = data.read(buffer, 0, STREAM_BUFFER_LENGTH);
795
796 while (read > -1) {
797 digest.update(buffer, 0, read);
798 read = data.read(buffer, 0, STREAM_BUFFER_LENGTH);
799 }
800
801 return digest;
802 }
803
804 /**
805 * Updates the given {@link MessageDigest}.
806 *
807 * @param messageDigest
808 * the {@link MessageDigest} to update
809 * @param valueToDigest
810 * the value to update the {@link MessageDigest} with;
811 * converted to bytes using {@link StringUtils#getBytesUtf8(String)}
812 * @return the updated {@link MessageDigest}
813 * @since 1.7
814 */
815 public static MessageDigest updateDigest(final MessageDigest messageDigest, final String valueToDigest) {
816 messageDigest.update(StringUtils.getBytesUtf8(valueToDigest));
817 return messageDigest;
818 }
819 }