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annotate app/src/main/java/ch/ethz/ssh2/crypto/digest/HashForSSH2Types.java @ 438:d29cce60f393

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migrate from Eclipse to Android Studio
author Carl Byington <carl@five-ten-sg.com>
date Thu, 03 Dec 2015 11:23:55 -0800
parents src/ch/ethz/ssh2/crypto/digest/HashForSSH2Types.java@071eccdff8ea
children
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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.io.IOException;
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8 import java.math.BigInteger;
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9 import java.security.DigestException;
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10
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11 /**
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12 * HashForSSH2Types.
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13 *
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14 * @author Christian Plattner
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15 * @version 2.50, 03/15/10
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16 */
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17 public class HashForSSH2Types {
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18 Digest md;
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19
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20 public HashForSSH2Types(Digest md) {
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21 this.md = md;
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22 }
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23
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24 public HashForSSH2Types(String type) {
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25 if (type.equals("SHA1")) {
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26 md = new SHA1();
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27 }
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28 else if (type.equals("SHA2")) {
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29 md = new SHA256();
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30 }
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31 else if (type.equals("MD5")) {
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32 md = new MD5();
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33 }
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34 else {
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35 throw new IllegalArgumentException(String.format("Unknown algorithm %s", type));
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36 }
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37 }
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38
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39 public void updateByte(byte b) {
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40 md.update(b);
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41 }
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42
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43 public void updateBytes(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 void updateUINT32(int v) {
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48 md.update((byte)(v >> 24));
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49 md.update((byte)(v >> 16));
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50 md.update((byte)(v >> 8));
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51 md.update((byte)(v));
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52 }
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53
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54 public void updateByteString(byte[] b) {
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55 updateUINT32(b.length);
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56 updateBytes(b);
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57 }
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58
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59 public void updateBigInt(BigInteger b) {
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60 updateByteString(b.toByteArray());
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61 }
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62
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63 public void reset() {
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64 md.reset();
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65 }
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66
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67 public int getDigestLength() {
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68 return md.getDigestLength();
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69 }
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70
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71 public byte[] getDigest() throws IOException {
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72 byte[] tmp = new byte[md.getDigestLength()];
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73 getDigest(tmp);
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74 return tmp;
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75 }
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76
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77 public void getDigest(byte[] out) throws IOException {
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78 try {
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79 getDigest(out, 0);
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80 }
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81 catch (DigestException e) {
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82 throw new IOException(e);
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83 }
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84 }
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85
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86 public void getDigest(byte[] out, int off) throws DigestException {
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87 md.digest(out, off);
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88 }
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89 }