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1 package net.sourceforge.jcetaglib.tools;
2
3 import java.io.FilterInputStream  ;
4 import java.io.IOException ;
5 import java.io.InputStream ;
6 import java.security.Signature ;
7 import java.security.SignatureException ;
8
9
12
13
14 public class SignatureInputStream extends FilterInputStream {
15 private Signature sig = null;
16
17 public SignatureInputStream(InputStream st,
18 Signature sig) {
19 super(st);
20 this.sig = sig;
21 }
22
23 public int read()
24 throws IOException {
25 int n = in.read();
26 if (n > -1) {
27 try {
28 sig.update((byte) n);
29 } catch (SignatureException s_ex) {
30 throw(new IOException (s_ex.getMessage()));
31 }
32 }
33
34 return (n);
35 }
36
37 public int read(byte[] b)
38 throws IOException {
39 int n = in.read(b);
40 if (n > -1) {
41 try {
42 sig.update(b, 0, n);
43 } catch (SignatureException s_ex) {
44 throw new IOException (s_ex.getMessage());
45 }
46 }
47
48 return (n);
49 }
50
51 public int read(byte[] b,
52 int o,
53 int l)
54 throws IOException {
55 int n = in.read(b, o, l);
56 if (n > -1) {
57 try {
58 sig.update(b, o, n);
59 } catch (SignatureException s_ex) {
60 throw(new IOException (s_ex.getMessage()));
61 }
62 }
63
64 return (n);
65 }
66 }
67 |
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