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1
2 package ch.ethz.ssh2.crypto.digest;
3
4 import java.math.BigInteger  ;
5
6
12 public class HashForSSH2Types
13 {
14 Digest md;
15
16 public HashForSSH2Types(Digest md)
17 {
18 this.md = md;
19 }
20
21 public HashForSSH2Types(String type)
22 {
23 if (type.equals("SHA1"))
24 {
25 md = new SHA1();
26 }
27 else if (type.equals("MD5"))
28 {
29 md = new MD5();
30 }
31 else
32 throw new IllegalArgumentException ("Unknown algorithm " + type);
33 }
34
35 public void updateByte(byte b)
36 {
37
38 byte[] tmp = new byte[1];
39 tmp[0] = b;
40 md.update(tmp);
41 }
42
43 public void updateBytes(byte[] b)
44 {
45 md.update(b);
46 }
47
48 public void updateUINT32(int v)
49 {
50 md.update((byte) (v >> 24));
51 md.update((byte) (v >> 16));
52 md.update((byte) (v >> 8));
53 md.update((byte) (v));
54 }
55
56 public void updateByteString(byte[] b)
57 {
58 updateUINT32(b.length);
59 updateBytes(b);
60 }
61
62 public void updateBigInt(BigInteger b)
63 {
64 updateByteString(b.toByteArray());
65 }
66
67 public void reset()
68 {
69 md.reset();
70 }
71
72 public int getDigestLength()
73 {
74 return md.getDigestLength();
75 }
76
77 public byte[] getDigest()
78 {
79 byte[] tmp = new byte[md.getDigestLength()];
80 getDigest(tmp);
81 return tmp;
82 }
83
84 public void getDigest(byte[] out)
85 {
86 getDigest(out, 0);
87 }
88
89 public void getDigest(byte[] out, int off)
90 {
91 md.digest(out, off);
92 }
93 }
94 |
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