1 package com.util;
2 /**
3 * MD5编码工具类
4 *
5 */
6 public class MD5Code {
7 static final int S11 = 7;
8
9 static final int S12 = 12;
10
11 static final int S13 = 17;
12
13 static final int S14 = 22;
14
15 static final int S21 = 5;
16
17 static final int S22 = 9;
18
19 static final int S23 = 14;
20
21 static final int S24 = 20;
22
23 static final int S31 = 4;
24
25 static final int S32 = 11;
26
27 static final int S33 = 16;
28
29 static final int S34 = 23;
30
31 static final int S41 = 6;
32
33 static final int S42 = 10;
34
35 static final int S43 = 15;
36
37 static final int S44 = 21;
38
39 static final byte[] PADDING = { -128, 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, 0, 0, 0,
41 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
42 0, 0, 0, 0, 0, 0, 0 };
43
44 private long[] state = new long[4];// state (ABCD)
45
46 private long[] count = new long[2];// number of bits, modulo 2^64 (lsb
47
48 // first)
49
50 private byte[] buffer = new byte[64]; // input buffer
51
52
53 public String digestHexStr;
54
55 private byte[] digest = new byte[16];
56
57 public String getMD5ofStr(String inbuf) {
58 md5Init();
59 md5Update(inbuf.getBytes(), inbuf.length());
60 md5Final();
61 digestHexStr = "";
62 for (int i = 0; i < 16; i++) {
63 digestHexStr += byteHEX(digest[i]);
64 }
65 return digestHexStr;
66 }
67
68 public MD5Code() {
69 md5Init();
70 return;
71 }
72
73 private void md5Init() {
74 count[0] = 0L;
75 count[1] = 0L;
76 // /* Load magic initialization constants.
77 state[0] = 0x67452301L;
78 state[1] = 0xefcdab89L;
79 state[2] = 0x98badcfeL;
80 state[3] = 0x10325476L;
81 return;
82 }
83
84 private long F(long x, long y, long z) {
85 return (x & y) | ((~x) & z);
86 }
87
88 private long G(long x, long y, long z) {
89 return (x & z) | (y & (~z));
90 }
91
92 private long H(long x, long y, long z) {
93 return x ^ y ^ z;
94 }
95
96 private long I(long x, long y, long z) {
97 return y ^ (x | (~z));
98 }
99
100 private long FF(long a, long b, long c, long d, long x, long s, long ac) {
101 a += F(b, c, d) + x + ac;
102 a = ((int) a << s) | ((int) a >>> (32 - s));
103 a += b;
104 return a;
105 }
106
107 private long GG(long a, long b, long c, long d, long x, long s, long ac) {
108 a += G(b, c, d) + x + ac;
109 a = ((int) a << s) | ((int) a >>> (32 - s));
110 a += b;
111 return a;
112 }
113
114 private long HH(long a, long b, long c, long d, long x, long s, long ac) {
115 a += H(b, c, d) + x + ac;
116 a = ((int) a << s) | ((int) a >>> (32 - s));
117 a += b;
118 return a;
119 }
120
121 private long II(long a, long b, long c, long d, long x, long s, long ac) {
122 a += I(b, c, d) + x + ac;
123 a = ((int) a << s) | ((int) a >>> (32 - s));
124 a += b;
125 return a;
126 }
127
128 private void md5Update(byte[] inbuf, int inputLen) {
129 int i, index, partLen;
130 byte[] block = new byte[64];
131 index = (int) (count[0] >>> 3) & 0x3F;
132 // /* Update number of bits */
133 if ((count[0] += (inputLen << 3)) < (inputLen << 3))
134 count[1]++;
135 count[1] += (inputLen >>> 29);
136 partLen = 64 - index;
137 // Transform as many times as possible.
138 if (inputLen >= partLen) {
139 md5Memcpy(buffer, inbuf, index, 0, partLen);
140 md5Transform(buffer);
141 for (i = partLen; i + 63 < inputLen; i += 64) {
142 md5Memcpy(block, inbuf, 0, i, 64);
143 md5Transform(block);
144 }
145 index = 0;
146 } else
147 i = 0;
148 // /* Buffer remaining input */
149 md5Memcpy(buffer, inbuf, index, i, inputLen - i);
150 }
151
152 private void md5Final() {
153 byte[] bits = new byte[8];
154 int index, padLen;
155 // /* Save number of bits */
156 Encode(bits, count, 8);
157 // /* Pad out to 56 mod 64.
158 index = (int) (count[0] >>> 3) & 0x3f;
159 padLen = (index < 56) ? (56 - index) : (120 - index);
160 md5Update(PADDING, padLen);
161 // /* Append length (before padding) */
162 md5Update(bits, 8);
163 // /* Store state in digest */
164 Encode(digest, state, 16);
165 }
166
167 private void md5Memcpy(byte[] output, byte[] input, int outpos, int inpos,
168 int len) {
169 int i;
170 for (i = 0; i < len; i++)
171 output[outpos + i] = input[inpos + i];
172 }
173
174 private void md5Transform(byte block[]) {
175 long a = state[0], b = state[1], c = state[2], d = state[3];
176 long[] x = new long[16];
177 Decode(x, block, 64);
178 /* Round 1 */
179 a = FF(a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */
180 d = FF(d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */
181 c = FF(c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */
182 b = FF(b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */
183 a = FF(a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */
184 d = FF(d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */
185 c = FF(c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */
186 b = FF(b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */
187 a = FF(a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */
188 d = FF(d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */
189 c = FF(c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */
190 b = FF(b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */
191 a = FF(a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */
192 d = FF(d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */
193 c = FF(c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */
194 b = FF(b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */
195 /* Round 2 */
196 a = GG(a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */
197 d = GG(d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */
198 c = GG(c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */
199 b = GG(b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */
200 a = GG(a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */
201 d = GG(d, a, b, c, x[10], S22, 0x2441453L); /* 22 */
202 c = GG(c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */
203 b = GG(b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */
204 a = GG(a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */
205 d = GG(d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */
206 c = GG(c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */
207 b = GG(b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */
208 a = GG(a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */
209 d = GG(d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */
210 c = GG(c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */
211 b = GG(b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */
212 /* Round 3 */
213 a = HH(a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */
214 d = HH(d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */
215 c = HH(c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */
216 b = HH(b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */
217 a = HH(a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */
218 d = HH(d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */
219 c = HH(c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */
220 b = HH(b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */
221 a = HH(a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */
222 d = HH(d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */
223 c = HH(c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */
224 b = HH(b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */
225 a = HH(a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */
226 d = HH(d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */
227 c = HH(c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */
228 b = HH(b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */
229 /* Round 4 */
230 a = II(a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */
231 d = II(d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */
232 c = II(c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */
233 b = II(b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */
234 a = II(a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */
235 d = II(d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */
236 c = II(c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */
237 b = II(b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */
238 a = II(a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */
239 d = II(d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */
240 c = II(c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */
241 b = II(b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */
242 a = II(a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */
243 d = II(d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */
244 c = II(c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */
245 b = II(b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */
246 state[0] += a;
247 state[1] += b;
248 state[2] += c;
249 state[3] += d;
250 }
251
252 private void Encode(byte[] output, long[] input, int len) {
253 int i, j;
254 for (i = 0, j = 0; j < len; i++, j += 4) {
255 output[j] = (byte) (input[i] & 0xffL);
256 output[j + 1] = (byte) ((input[i] >>> 8) & 0xffL);
257 output[j + 2] = (byte) ((input[i] >>> 16) & 0xffL);
258 output[j + 3] = (byte) ((input[i] >>> 24) & 0xffL);
259 }
260 }
261
262 private void Decode(long[] output, byte[] input, int len) {
263 int i, j;
264 for (i = 0, j = 0; j < len; i++, j += 4)
265 output[i] = b2iu(input[j]) | (b2iu(input[j + 1]) << 8)
266 | (b2iu(input[j + 2]) << 16) | (b2iu(input[j + 3]) << 24);
267 return;
268 }
269
270 public static long b2iu(byte b) {
271 return b < 0 ? b & 0x7F + 128 : b;
272 }
273
274 public static String byteHEX(byte ib) {
275 char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',
276 'B', 'C', 'D', 'E', 'F' };
277 char[] ob = new char[2];
278 ob[0] = Digit[(ib >>> 4) & 0X0F];
279 ob[1] = Digit[ib & 0X0F];
280 String s = new String(ob);
281 return s;
282 }
283 }
