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MD5加密
http://h50237.www5.hp.com/iPortal/Template/Publication/Common/OneColumnWithLogo.aspx?PublicationID=71314e53-cc92-4c44-ac50-a7534a2d7ed6
MD5 md5=new MD5();
sPwd=md5.getMD5ofStr(sPwd);
1
package
com.excp.publicinfo;
2
/** */
/**
**********************************************
3
MD5 �㷨��Java Bean
4
@author
:Topcat Tuppin
5
Last Modified:10,Mar,2001
6
************************************************
*/
7
import
java.lang.reflect.
*
;
8
/** */
/**
***********************************************
9
md5 ��ʵ����RSA Data Security, Inc.���ύ��IETF
10
��RFC1321�е�MD5 message-digest �㷨��
11
************************************************
*/
12
13
public
class
MD5
{
14
/**/
/*
������ЩS11-S44ʵ������һ��4*4�ľ�����ԭʼ��Cʵ��������#define ʵ�ֵģ�
15
���������ʵ�ֳ�Ϊstatic final�DZ�ʾ��ֻ�c�������ͬһ���̿ռ��ڵĶ��
16
Instance�乲��
*/
17
static
final
int
S11
=
7
;
18
static
final
int
S12
=
12
;
19
static
final
int
S13
=
17
;
20
static
final
int
S14
=
22
;
21
22
static
final
int
S21
=
5
;
23
static
final
int
S22
=
9
;
24
static
final
int
S23
=
14
;
25
static
final
int
S24
=
20
;
26
27
static
final
int
S31
=
4
;
28
static
final
int
S32
=
11
;
29
static
final
int
S33
=
16
;
30
static
final
int
S34
=
23
;
31
32
static
final
int
S41
=
6
;
33
static
final
int
S42
=
10
;
34
static
final
int
S43
=
15
;
35
static
final
int
S44
=
21
;
36
37
static
final
byte
[] PADDING
=
{
-
128
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
38
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
39
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
40
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
}
;
41
/**/
/*
���������Ա��MD5���������õ���3�������ݣ���ԭʼ��Cʵ����
42
�����嵽MD5_CTX�ṹ��
43
44
*/
45
private
long
[] state
=
new
long
[
4
];
//
state (ABCD)
46
private
long
[] count
=
new
long
[
2
];
//
number of bits, modulo 2^64 (lsb first)
47
private
byte
[] buffer
=
new
byte
[
64
];
//
input buffer
48
49
/**/
/*
digestHexStr��MD5��Ψһһ�����Ա��������һ�μ������
50
�� 16����ASCII��ʾ.
51
*/
52
public
String digestHexStr;
53
54
/**/
/*
digest,������һ�μ������2�����ڲ���ʾ����ʾ128bit��MD5ֵ.
55
*/
56
private
byte
[] digest
=
new
byte
[
16
];
57
58
/**/
/*
59
getMD5ofStr����MD5����Ҫ�Ĺ�����������ڲ���������Ҫ����MD5�任���ַ�
60
���ص��DZ任��Ľ��������Ǵӹ�����ԱdigestHexStrȡ�õģ�
61
*/
62
public
String getMD5ofStr(String inbuf)
{
63
md5Init();
64
md5Update(inbuf.getBytes(), inbuf.length());
65
md5Final();
66
digestHexStr
=
""
;
67
for
(
int
i
=
0
; i
<
16
; i
++
)
{
68
digestHexStr
+=
byteHEX(digest[i]);
69
}
70
return
digestHexStr;
71
72
}
73
//
����MD5�����ı����캯��JavaBeanҪ����һ��public�IJ���û�в���Ĺ��캯��
74
public
MD5()
{
75
md5Init();
76
77
return
;
78
}
79
80
81
82
/**/
/*
md5Init��һ���ʼ�������ʼ�����ı���װ����Ļ���
*/
83
private
void
md5Init()
{
84
count[
0
]
=
0L
;
85
count[
1
]
=
0L
;
86
//
/* Load magic initialization constants.
87
88
state[
0
]
=
0x67452301L
;
89
state[
1
]
=
0xefcdab89L
;
90
state[
2
]
=
0x98badcfeL
;
91
state[
3
]
=
0x10325476L
;
92
93
return
;
94
}
95
/**/
/*
F, G, H ,I ��4����MD5������ԭʼ��MD5��Cʵ���У�����������
96
��λ���㣬���ܳ���Ч�ʵĿ��ǰ�����ʵ�ֳ��˺꣬��java�У����ǰ�����
97
����ʵ�ֳ���private���������ֱ�����ԭ4C�еġ�
*/
98
99
private
long
F(
long
x,
long
y,
long
z)
{
100
return
(x
&
y)
|
((
~
x)
&
z);
101
102
}
103
private
long
G(
long
x,
long
y,
long
z)
{
104
return
(x
&
z)
|
(y
&
(
~
z));
105
106
}
107
private
long
H(
long
x,
long
y,
long
z)
{
108
return
x
^
y
^
z;
109
}
110
111
private
long
I(
long
x,
long
y,
long
z)
{
112
return
y
^
(x
|
(
~
z));
113
}
114
115
/**/
/*
116
FF,GG,HH��II������F,G,H,I���н�һ���任
117
FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
118
Rotation is separate from addition to prevent recomputation.
119
*/
120
121
private
long
FF(
long
a,
long
b,
long
c,
long
d,
long
x,
long
s,
122
long
ac)
{
123
a
+=
F (b, c, d)
+
x
+
ac;
124
a
=
((
int
) a
<<
s)
|
((
int
) a
>>>
(
32
-
s));
125
a
+=
b;
126
return
a;
127
}
128
129
private
long
GG(
long
a,
long
b,
long
c,
long
d,
long
x,
long
s,
130
long
ac)
{
131
a
+=
G (b, c, d)
+
x
+
ac;
132
a
=
((
int
) a
<<
s)
|
((
int
) a
>>>
(
32
-
s));
133
a
+=
b;
134
return
a;
135
}
136
private
long
HH(
long
a,
long
b,
long
c,
long
d,
long
x,
long
s,
137
long
ac)
{
138
a
+=
H (b, c, d)
+
x
+
ac;
139
a
=
((
int
) a
<<
s)
|
((
int
) a
>>>
(
32
-
s));
140
a
+=
b;
141
return
a;
142
}
143
private
long
II(
long
a,
long
b,
long
c,
long
d,
long
x,
long
s,
144
long
ac)
{
145
a
+=
I (b, c, d)
+
x
+
ac;
146
a
=
((
int
) a
<<
s)
|
((
int
) a
>>>
(
32
-
s));
147
a
+=
b;
148
return
a;
149
}
150
/**/
/*
151
md5Update��MD5��������̣�inbuf��Ҫ�任���ֽڴ���inputlen�dz��ȣ����
152
������getMD5ofStr���ã�����֮ǰ��Ҫ����md5init����˰�����Ƴ�private��
153
*/
154
private
void
md5Update(
byte
[] inbuf,
int
inputLen)
{
155
156
int
i, index, partLen;
157
byte
[] block
=
new
byte
[
64
];
158
index
=
(
int
)(count[
0
]
>>>
3
)
&
0x3F
;
159
//
/* Update number of bits */
160
if
((count[
0
]
+=
(inputLen
<<
3
))
<
(inputLen
<<
3
))
161
count[
1
]
++
;
162
count[
1
]
+=
(inputLen
>>>
29
);
163
164
partLen
=
64
-
index;
165
166
//
Transform as many times as possible.
167
if
(inputLen
>=
partLen)
{
168
md5Memcpy(buffer, inbuf, index,
0
, partLen);
169
md5Transform(buffer);
170
171
for
(i
=
partLen; i
+
63
<
inputLen; i
+=
64
)
{
172
173
md5Memcpy(block, inbuf,
0
, i,
64
);
174
md5Transform (block);
175
}
176
index
=
0
;
177
178
}
else
179
180
i
=
0
;
181
182
//
/* Buffer remaining input */
183
md5Memcpy(buffer, inbuf, index, i, inputLen
-
i);
184
185
}
186
187
/**/
/*
188
md5Final�����������
189
*/
190
private
void
md5Final ()
{
191
byte
[] bits
=
new
byte
[
8
];
192
int
index, padLen;
193
194
//
/* Save number of bits */
195
Encode (bits, count,
8
);
196
197
//
/* Pad out to 56 mod 64.
198
index
=
(
int
)(count[
0
]
>>>
3
)
&
0x3f
;
199
padLen
=
(index
<
56
)
?
(
56
-
index) : (
120
-
index);
200
md5Update (PADDING, padLen);
201
202
//
/* Append length (before padding) */
203
md5Update(bits,
8
);
204
205
//
/* Store state in digest */
206
Encode (digest, state,
16
);
207
208
}
209
210
/**/
/*
md5Memcpy��һ���ڲ�ʹ�õ�byte����Ŀ鿽�������input��inpos��ʼ��len���ȵ�
211
���������� �ֽڿ�����output��outposλ�ÿ�ʼ
212
*/
213
214
private
void
md5Memcpy (
byte
[] output,
byte
[] input,
215
int
outpos,
int
inpos,
int
len)
216
{
217
int
i;
218
219
for
(i
=
0
; i
<
len; i
++
)
220
output[outpos
+
i]
=
input[inpos
+
i];
221
}
222
223
/**/
/*
224
md5Transform��MD5���ı任������md5Update���ã�block�Ƿֿ��ԭʼ�ֽ�
225
*/
226
private
void
md5Transform (
byte
block[])
{
227
long
a
=
state[
0
], b
=
state[
1
], c
=
state[
2
], d
=
state[
3
];
228
long
[] x
=
new
long
[
16
];
229
230
Decode (x, block,
64
);
231
232
/**/
/*
Round 1
*/
233
a
=
FF (a, b, c, d, x[
0
], S11,
0xd76aa478L
);
/**/
/*
1
*/
234
d
=
FF (d, a, b, c, x[
1
], S12,
0xe8c7b756L
);
/**/
/*
2
*/
235
c
=
FF (c, d, a, b, x[
2
], S13,
0x242070dbL
);
/**/
/*
3
*/
236
b
=
FF (b, c, d, a, x[
3
], S14,
0xc1bdceeeL
);
/**/
/*
4
*/
237
a
=
FF (a, b, c, d, x[
4
], S11,
0xf57c0fafL
);
/**/
/*
5
*/
238
d
=
FF (d, a, b, c, x[
5
], S12,
0x4787c62aL
);
/**/
/*
6
*/
239
c
=
FF (c, d, a, b, x[
6
], S13,
0xa8304613L
);
/**/
/*
7
*/
240
b
=
FF (b, c, d, a, x[
7
], S14,
0xfd469501L
);
/**/
/*
8
*/
241
a
=
FF (a, b, c, d, x[
8
], S11,
0x698098d8L
);
/**/
/*
9
*/
242
d
=
FF (d, a, b, c, x[
9
], S12,
0x8b44f7afL
);
/**/
/*
10
*/
243
c
=
FF (c, d, a, b, x[
10
], S13,
0xffff5bb1L
);
/**/
/*
11
*/
244
b
=
FF (b, c, d, a, x[
11
], S14,
0x895cd7beL
);
/**/
/*
12
*/
245
a
=
FF (a, b, c, d, x[
12
], S11,
0x6b901122L
);
/**/
/*
13
*/
246
d
=
FF (d, a, b, c, x[
13
], S12,
0xfd987193L
);
/**/
/*
14
*/
247
c
=
FF (c, d, a, b, x[
14
], S13,
0xa679438eL
);
/**/
/*
15
*/
248
b
=
FF (b, c, d, a, x[
15
], S14,
0x49b40821L
);
/**/
/*
16
*/
249
250
/**/
/*
Round 2
*/
251
a
=
GG (a, b, c, d, x[
1
], S21,
0xf61e2562L
);
/**/
/*
17
*/
252
d
=
GG (d, a, b, c, x[
6
], S22,
0xc040b340L
);
/**/
/*
18
*/
253
c
=
GG (c, d, a, b, x[
11
], S23,
0x265e5a51L
);
/**/
/*
19
*/
254
b
=
GG (b, c, d, a, x[
0
], S24,
0xe9b6c7aaL
);
/**/
/*
20
*/
255
a
=
GG (a, b, c, d, x[
5
], S21,
0xd62f105dL
);
/**/
/*
21
*/
256
d
=
GG (d, a, b, c, x[
10
], S22,
0x2441453L
);
/**/
/*
22
*/
257
c
=
GG (c, d, a, b, x[
15
], S23,
0xd8a1e681L
);
/**/
/*
23
*/
258
b
=
GG (b, c, d, a, x[
4
], S24,
0xe7d3fbc8L
);
/**/
/*
24
*/
259
a
=
GG (a, b, c, d, x[
9
], S21,
0x21e1cde6L
);
/**/
/*
25
*/
260
d
=
GG (d, a, b, c, x[
14
], S22,
0xc33707d6L
);
/**/
/*
26
*/
261
c
=
GG (c, d, a, b, x[
3
], S23,
0xf4d50d87L
);
/**/
/*
27
*/
262
b
=
GG (b, c, d, a, x[
8
], S24,
0x455a14edL
);
/**/
/*
28
*/
263
a
=
GG (a, b, c, d, x[
13
], S21,
0xa9e3e905L
);
/**/
/*
29
*/
264
d
=
GG (d, a, b, c, x[
2
], S22,
0xfcefa3f8L
);
/**/
/*
30
*/
265
c
=
GG (c, d, a, b, x[
7
], S23,
0x676f02d9L
);
/**/
/*
31
*/
266
b
=
GG (b, c, d, a, x[
12
], S24,
0x8d2a4c8aL
);
/**/
/*
32
*/
267
268
/**/
/*
Round 3
*/
269
a
=
HH (a, b, c, d, x[
5
], S31,
0xfffa3942L
);
/**/
/*
33
*/
270
d
=
HH (d, a, b, c, x[
8
], S32,
0x8771f681L
);
/**/
/*
34
*/
271
c
=
HH (c, d, a, b, x[
11
], S33,
0x6d9d6122L
);
/**/
/*
35
*/
272
b
=
HH (b, c, d, a, x[
14
], S34,
0xfde5380cL
);
/**/
/*
36
*/
273
a
=
HH (a, b, c, d, x[
1
], S31,
0xa4beea44L
);
/**/
/*
37
*/
274
d
=
HH (d, a, b, c, x[
4
], S32,
0x4bdecfa9L
);
/**/
/*
38
*/
275
c
=
HH (c, d, a, b, x[
7
], S33,
0xf6bb4b60L
);
/**/
/*
39
*/
276
b
=
HH (b, c, d, a, x[
10
], S34,
0xbebfbc70L
);
/**/
/*
40
*/
277
a
=
HH (a, b, c, d, x[
13
], S31,
0x289b7ec6L
);
/**/
/*
41
*/
278
d
=
HH (d, a, b, c, x[
0
], S32,
0xeaa127faL
);
/**/
/*
42
*/
279
c
=
HH (c, d, a, b, x[
3
], S33,
0xd4ef3085L
);
/**/
/*
43
*/
280
b
=
HH (b, c, d, a, x[
6
], S34,
0x4881d05L
);
/**/
/*
44
*/
281
a
=
HH (a, b, c, d, x[
9
], S31,
0xd9d4d039L
);
/**/
/*
45
*/
282
d
=
HH (d, a, b, c, x[
12
], S32,
0xe6db99e5L
);
/**/
/*
46
*/
283
c
=
HH (c, d, a, b, x[
15
], S33,
0x1fa27cf8L
);
/**/
/*
47
*/
284
b
=
HH (b, c, d, a, x[
2
], S34,
0xc4ac5665L
);
/**/
/*
48
*/
285
286
/**/
/*
Round 4
*/
287
a
=
II (a, b, c, d, x[
0
], S41,
0xf4292244L
);
/**/
/*
49
*/
288
d
=
II (d, a, b, c, x[
7
], S42,
0x432aff97L
);
/**/
/*
50
*/
289
c
=
II (c, d, a, b, x[
14
], S43,
0xab9423a7L
);
/**/
/*
51
*/
290
b
=
II (b, c, d, a, x[
5
], S44,
0xfc93a039L
);
/**/
/*
52
*/
291
a
=
II (a, b, c, d, x[
12
], S41,
0x655b59c3L
);
/**/
/*
53
*/
292
d
=
II (d, a, b, c, x[
3
], S42,
0x8f0ccc92L
);
/**/
/*
54
*/
293
c
=
II (c, d, a, b, x[
10
], S43,
0xffeff47dL
);
/**/
/*
55
*/
294
b
=
II (b, c, d, a, x[
1
], S44,
0x85845dd1L
);
/**/
/*
56
*/
295
a
=
II (a, b, c, d, x[
8
], S41,
0x6fa87e4fL
);
/**/
/*
57
*/
296
d
=
II (d, a, b, c, x[
15
], S42,
0xfe2ce6e0L
);
/**/
/*
58
*/
297
c
=
II (c, d, a, b, x[
6
], S43,
0xa3014314L
);
/**/
/*
59
*/
298
b
=
II (b, c, d, a, x[
13
], S44,
0x4e0811a1L
);
/**/
/*
60
*/
299
a
=
II (a, b, c, d, x[
4
], S41,
0xf7537e82L
);
/**/
/*
61
*/
300
d
=
II (d, a, b, c, x[
11
], S42,
0xbd3af235L
);
/**/
/*
62
*/
301
c
=
II (c, d, a, b, x[
2
], S43,
0x2ad7d2bbL
);
/**/
/*
63
*/
302
b
=
II (b, c, d, a, x[
9
], S44,
0xeb86d391L
);
/**/
/*
64
*/
303
304
state[
0
]
+=
a;
305
state[
1
]
+=
b;
306
state[
2
]
+=
c;
307
state[
3
]
+=
d;
308
309
}
310
311
/**/
/*
Encode��long���鰴˳����byte���飬��Ϊjava��long������64bit�ģ�
312
ֻ���32bit������ӦԭʼCʵ�ֵ���;
313
*/
314
private
void
Encode (
byte
[] output,
long
[] input,
int
len)
{
315
int
i, j;
316
317
for
(i
=
0
, j
=
0
; j
<
len; i
++
, j
+=
4
)
{
318
output[j]
=
(
byte
)(input[i]
&
0xffL
);
319
output[j
+
1
]
=
(
byte
)((input[i]
>>>
8
)
&
0xffL
);
320
output[j
+
2
]
=
(
byte
)((input[i]
>>>
16
)
&
0xffL
);
321
output[j
+
3
]
=
(
byte
)((input[i]
>>>
24
)
&
0xffL
);
322
}
323
}
324
325
/**/
/*
Decode��byte���鰴˳��ϳɳ�long���飬��Ϊjava��long������64bit�ģ�
326
ֻ�ϳɵ�32bit����32bit���㣬����ӦԭʼCʵ�ֵ���;
327
*/
328
private
void
Decode (
long
[] output,
byte
[] input,
int
len)
{
329
int
i, j;
330
331
332
for
(i
=
0
, j
=
0
; j
<
len; i
++
, j
+=
4
)
333
output[i]
=
b2iu(input[j])
|
334
(b2iu(input[j
+
1
])
<<
8
)
|
335
(b2iu(input[j
+
2
])
<<
16
)
|
336
(b2iu(input[j
+
3
])
<<
24
);
337
338
return
;
339
}
340
341
/**/
/*
342
b2iu����д��һ���byte���ղ�������ŵ�ԭ��ģ���λ��������Ϊjavaû��unsigned����
343
*/
344
public
static
long
b2iu(
byte
b)
{
345
return
b
<
0
?
b
&
0x7F
+
128
: b;
346
}
347
348
/**/
/*
byteHEX()����4��һ��byte���͵���ת����ʮ����Ƶ�ASCII��ʾ��
349
����Ϊjava�е�byte��toString��ʵ����һ�㣬������û��C�����е�
350
sprintf(outbuf,"%02X",ib)
351
*/
352
public
static
String byteHEX(
byte
ib)
{
353
char
[] Digit
=
{
'
0
'
,
'
1
'
,
'
2
'
,
'
3
'
,
'
4
'
,
'
5
'
,
'
6
'
,
'
7
'
,
'
8
'
,
'
9
'
,
354
'
A
'
,
'
B
'
,
'
C
'
,
'
D
'
,
'
E
'
,
'
F
'
}
;
355
char
[] ob
=
new
char
[
2
];
356
ob[
0
]
=
Digit[(ib
>>>
4
)
&
0X0F
];
357
ob[
1
]
=
Digit[ib
&
0X0F
];
358
String s
=
new
String(ob);
359
return
s;
360
}
361
362
public
static
void
main(String args[])
{
363
364
365
MD5 m
=
new
MD5();
366
if
(Array.getLength(args)
==
0
)
{
//
���û�в���ִ�б���Test Suite
367
368
System.out.println(
"
MD5 Test suite:
"
);
369
System.out.println(
"
MD5(\
"
\
"
):
"
+
m.getMD5ofStr(
""
));
370
System.out.println(
"
MD5(\
"
a\
"
):
"
+
m.getMD5ofStr(
"
a
"
));
371
System.out.println(
"
MD5(\
"
abc\
"
):
"
+
m.getMD5ofStr(
"
abc
"
));
372
System.out.println(
"
MD5(\
"
message digest\
"
):
"
+
m.getMD5ofStr(
"
message digest
"
));
373
System.out.println(
"
MD5(\
"
abcdefghijklmnopqrstuvwxyz\
"
):
"
+
374
m.getMD5ofStr(
"
abcdefghijklmnopqrstuvwxyz
"
));
375
System.out.println(
"
MD5(\
"
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\
"
):
"
+
376
m.getMD5ofStr(
"
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789
"
));
377
}
378
else
379
System.out.println(
"
MD5(
"
+
args[
0
]
+
"
)=
"
+
m.getMD5ofStr(args[
0
]));
380
381
382
}
383
384
}
posted on 2007-11-12 09:25
华少
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