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1
17 package org.cofax.util.digest;
18
19 import java.security.MessageDigest  ;
20 import java.security.NoSuchAlgorithmException ;
21 import org.cofax.cms.CofaxToolsUtil;
22 import com.Ostermiller.util.Base64;
23
24 public class SHADigestHandler implements IDigestHandler {
25
26 public static final String RCS_ID = "$Header: /cvsroot/cofax/cofax/src/org/cofax/util/digest/SHADigestHandler.java,v 1.1.2.1 2006/12/11 16:29:51 fxrobin Exp $";
27
28 private static final String hexits = "0123456789abcdef";
29
30 private static final String id = "SHA";
31
32 public boolean isSupported(String digest) {
33 if (digest.regionMatches(true, 0, "{SHA}", 0, 5)) {
34 return true;
35 } else if (digest.regionMatches(true, 0, "{SSHA}", 0, 6)) {
36 return true;
37 }
38
39 return false;
40 }
41
42
46 public boolean checkPassword(String password, String digest) {
47 boolean passwordMatch = false;
48
49 MessageDigest sha = null;
50 try {
51 sha = MessageDigest.getInstance("SHA-1");
52
53 if (digest.regionMatches(true, 0, "{SHA}", 0, 5)) {
54 digest = digest.substring(5); } else if (digest.regionMatches(true, 0, "{SSHA}", 0, 6)) {
56 digest = digest.substring(6); }
58 byte[][] hs = split(Base64.decode(digest.getBytes()), 20);
59 byte[] hash = hs[0];
60 byte[] salt = hs[1];
61 sha.reset();
62 sha.update(password.getBytes());
63 sha.update(salt);
64 byte[] pwhash = sha.digest();
65 if (MessageDigest.isEqual(hash, pwhash)) {
66 passwordMatch = true;
67 }
68 } catch (NoSuchAlgorithmException nsae) {
69 CofaxToolsUtil.log("Algorithme SHA-1 non supporte a la verification du password" + nsae + id);
70 }
71
72 return passwordMatch;
73 }
74
75
78 public static String getSSHADigest(String password, String salt) {
79 String digest = null;
80
81 MessageDigest sha = null;
82 try {
83 sha = MessageDigest.getInstance("SHA-1");
84
85 sha.reset();
86 sha.update(password.getBytes());
87 sha.update(salt.getBytes());
88 byte[] pwhash = sha.digest();
89 digest = "{SSHA}" + new String (Base64.encode(concatenate(pwhash, salt.getBytes())));
90
91 } catch (NoSuchAlgorithmException nsae) {
92 CofaxToolsUtil.log("Algorithme SHA-1 non supporte a la creation du hashage" + nsae + id);
93 }
94
95 return digest;
96 }
97
98
101 public static String getSHADigest(String password) {
102 String digest = null;
103
104 MessageDigest sha = null;
105 try {
106 sha = MessageDigest.getInstance("SHA-1");
107
108 sha.reset();
109 sha.update(password.getBytes());
110 byte[] pwhash = sha.digest();
111 digest = "{SHA}" + new String (Base64.encode(pwhash));
112
113 } catch (NoSuchAlgorithmException nsae) {
114 CofaxToolsUtil.log("Algorithme SHA-1 non supporte a la creation du hashage" + nsae + id);
115 }
116
117 return digest;
118 }
119
120 private static byte[] concatenate(byte[] l, byte[] r) {
121 byte[] b = new byte[l.length + r.length];
122 System.arraycopy(l, 0, b, 0, l.length);
123 System.arraycopy(r, 0, b, l.length, r.length);
124 return b;
125 }
126
127 private static byte[][] split(byte[] src, int n) {
128 byte[] l, r;
129 if (src.length <= n) {
130 l = src;
131 r = new byte[0];
132 } else {
133 l = new byte[n];
134 r = new byte[src.length - n];
135 System.arraycopy(src, 0, l, 0, n);
136 System.arraycopy(src, n, r, 0, r.length);
137 }
138 byte[][] lr = { l, r };
139 return lr;
140 }
141
142 private static String toHex(byte[] block) {
143 StringBuffer buf = new StringBuffer ();
144 for (int i = 0; i < block.length; ++i) {
145 buf.append(hexits.charAt((block[i] >>> 4) & 0xf));
146 buf.append(hexits.charAt(block[i] & 0xf));
147 }
148 return buf + "";
149 }
150
151 private static byte[] fromHex(String s) {
152 s = s.toLowerCase();
153 byte[] b = new byte[(s.length() + 1) / 2];
154 int j = 0;
155 int h;
156 int nybble = -1;
157 for (int i = 0; i < s.length(); ++i) {
158 h = hexits.indexOf(s.charAt(i));
159 if (h >= 0) {
160 if (nybble < 0) {
161 nybble = h;
162 } else {
163 b[j++] = (byte) ((nybble << 4) + h);
164 nybble = -1;
165 }
166 }
167 }
168 if (nybble >= 0) {
169 b[j++] = (byte) (nybble << 4);
170 }
171 if (j < b.length) {
172 byte[] b2 = new byte[j];
173 System.arraycopy(b, 0, b2, 0, j);
174 b = b2;
175 }
176 return b;
177 }
178 }
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