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annotate src/ch/ethz/ssh2/crypto/digest/SHA256.java @ 283:3855f58ffd2b ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 17:32:11 -0700
parents 91a31873c42a
children 071eccdff8ea
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1 /*
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2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
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3 * Please refer to the LICENSE.txt for licensing details.
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4 */
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5 package ch.ethz.ssh2.crypto.digest;
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6
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7 import java.security.DigestException;
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8 import java.security.MessageDigest;
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9 import java.security.NoSuchAlgorithmException;
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10
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11 /**
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12 * @version $Id: SHA256.java 152 2014-04-28 11:02:23Z dkocher@sudo.ch $
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13 */
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14 public final class SHA256 implements Digest {
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15
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16 private MessageDigest md;
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17
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18 public SHA256() {
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19 try {
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20 md = MessageDigest.getInstance("SHA-256");
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21 }
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22 catch(NoSuchAlgorithmException e) {
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23 throw new IllegalArgumentException(e);
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24 }
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25 }
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26
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27 public final int getDigestLength() {
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28 return md.getDigestLength();
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29 }
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30
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31 public final void reset() {
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32 md.reset();
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33 }
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34
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35 public final void update(byte b[]) {
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36 this.update(b, 0, b.length);
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37 }
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38
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39 public final void update(byte b[], int off, int len) {
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40 md.update(b, off, len);
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41 }
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42
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43 public final void update(byte b) {
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44 md.update(b);
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45 }
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46
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47 public final void digest(byte[] out) throws DigestException {
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48 this.digest(out, 0);
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49 }
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50
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51 public final void digest(byte[] out, int off) throws DigestException {
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52 md.digest(out, off, out.length);
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53 }
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54 }