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1
5 package org.h2.security;
6
7 import java.util.Arrays  ;
8
9 public class SHA256 {
10
11
13 public byte[] getHashWithSalt(byte[] data, byte[] salt) {
14 byte[] buff = new byte[data.length + salt.length];
15 System.arraycopy(data, 0, buff, 0, data.length);
16 System.arraycopy(salt, 0, buff, data.length, salt.length);
17 return getHash(buff);
18 }
19
20 public byte[] getKeyPasswordHash(String userName, char[] password) {
21 String user=userName + "@";
22 byte[] buff = new byte[2*(user.length()+password.length)];
23 int n=0;
24 for(int i=0; i<user.length(); i++) {
25 char c = user.charAt(i);
26 buff[n++] = (byte) (c >> 8);
27 buff[n++] = (byte) (c);
28 }
29 for(int i=0; i<password.length; i++) {
30 char c = password[i];
31 buff[n++] = (byte) (c >> 8);
32 buff[n++] = (byte) (c);
33 }
34 Arrays.fill(password, (char)0);
35 return getHash(buff);
36 }
37
38 private static final int[] K = { 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
41 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98,
42 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe,
43 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6,
44 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
45 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3,
46 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138,
47 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e,
48 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
49 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116,
50 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
51 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814,
52 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 };
53
54
55 public byte[] getHash(byte[] data) {
56 int bytelen = data.length;
57 int intlen = ((bytelen + 9 + 63) / 64) * 16;
58 byte[] bytes = new byte[intlen * 4];
59 System.arraycopy(data, 0, bytes, 0, bytelen);
60 bytes[bytelen] = (byte) 0x80;
61 int[] buff = new int[intlen];
62 for (int i = 0, j = 0; j < intlen; i += 4, j++) {
63 buff[j] = readInt(bytes, i);
64 }
65 buff[intlen - 2] = bytelen >>> 29;
66 buff[intlen - 1] = (bytelen << 3) & 0xffffffff;
67 int[] w = new int[64];
68 int[] hh = new int[] { 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
69 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 };
70
71 for (int block = 0; block < intlen; block += 16) {
72 for (int i = 0; i < 16; i++) {
73 w[i] = buff[block + i];
74 }
75 for (int i = 16; i < 64; i++) {
76 int x = w[i - 2];
77 int theta1 = rot(x, 17) ^ rot(x, 19) ^ (x >>> 10);
78 x = w[i - 15];
79 int theta0 = rot(x, 7) ^ rot(x, 18) ^ (x >>> 3);
80 w[i] = theta1 + w[i - 7] + theta0 + w[i - 16];
81 }
82
83 int a = hh[0], b = hh[1], c = hh[2], d = hh[3];
84 int e = hh[4], f = hh[5], g = hh[6], h = hh[7];
85
86 for (int i = 0; i < 64; i++) {
87 int t1 = h + (rot(e, 6) ^ rot(e, 11) ^ rot(e, 25))
88 + ((e & f) ^ ((~e) & g)) + K[i] + w[i];
89 int t2 = (rot(a, 2) ^ rot(a, 13) ^ rot(a, 22))
90 + ((a & b) ^ (a & c) ^ (b & c));
91 h = g;
92 g = f;
93 f = e;
94 e = d + t1;
95 d = c;
96 c = b;
97 b = a;
98 a = t1 + t2;
99 }
100 hh[0] += a;
101 hh[1] += b;
102 hh[2] += c;
103 hh[3] += d;
104 hh[4] += e;
105 hh[5] += f;
106 hh[6] += g;
107 hh[7] += h;
108 }
109 byte[] result = new byte[32];
110 for (int i = 0; i < 8; i++) {
111 writeInt(result, i*4, hh[i]);
112 }
113 Arrays.fill(w, 0);
114 Arrays.fill(buff, 0);
115 Arrays.fill(hh, 0);
116 Arrays.fill(bytes, (byte) 0);
117 return result;
118 }
119
120 private int rot(int i, int count) {
121 return (i << (32 - count)) | (i >>> count);
122 }
123
124 private int readInt(byte[] b, int i) {
125 return ((b[i] & 0xff) << 24) + ((b[i + 1] & 0xff) << 16)
126 + ((b[i + 2] & 0xff) << 8) + (b[i + 3] & 0xff);
127 }
128
129 private void writeInt(byte[] b, int i, int value) {
130 b[i] = (byte) (value >> 24);
131 b[i + 1] = (byte) (value >> 16);
132 b[i + 2] = (byte) (value >> 8);
133 b[i + 3] = (byte) value;
134 }
135
136 }
137 |
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