1 21 package com.db4o.io.crypt; 22 23 26 public class KeyGenerator { 27 30 public KeyGenerator() { 31 32 } 33 34 43 public int[] core(String message) { 44 45 int[] messageAsInt = string2integer_padding(message); 46 int a = 0x01234567; 47 int b = 0x89abcdef; 48 int c = 0xfedcba98; 49 int d = 0x76543210; 50 51 for (int i = 0; i < messageAsInt.length; i += 16) { 52 int variable_a = a; 53 int variable_b = b; 54 int variable_c = c; 55 int variable_d = d; 56 57 a = ff(a, b, c, d, messageAsInt[i + 0], 7, 0xD76AA478); 58 d = ff(d, a, b, c, messageAsInt[i + 1], 12, 0xE8C7B756); 59 c = ff(c, d, a, b, messageAsInt[i + 2], 17, 0x242070DB); 60 b = ff(b, c, d, a, messageAsInt[i + 3], 22, 0xC1BDCEEE); 61 a = ff(a, b, c, d, messageAsInt[i + 4], 7, 0xF57C0FAF); 62 d = ff(d, a, b, c, messageAsInt[i + 5], 12, 0x4787C62A); 63 c = ff(c, d, a, b, messageAsInt[i + 6], 17, 0xA8304613); 64 b = ff(b, c, d, a, messageAsInt[i + 7], 22, 0xFD469501); 65 a = ff(a, b, c, d, messageAsInt[i + 8], 7, 0x698098D8); 66 d = ff(d, a, b, c, messageAsInt[i + 9], 12, 0x8B44F7AF); 67 c = ff(c, d, a, b, messageAsInt[i + 10], 17, 0xFFFF5BB1); 68 b = ff(b, c, d, a, messageAsInt[i + 11], 22, 0x895CD7BE); 69 a = ff(a, b, c, d, messageAsInt[i + 12], 7, 0x6B901122); 70 d = ff(d, a, b, c, messageAsInt[i + 13], 12, 0xFD987193); 71 c = ff(c, d, a, b, messageAsInt[i + 14], 17, 0xA679438E); 72 b = ff(b, c, d, a, messageAsInt[i + 15], 22, 0x49B40821); 73 74 a = gg(a, b, c, d, messageAsInt[i + 1], 5, 0xF61E2562); 75 d = gg(d, a, b, c, messageAsInt[i + 6], 9, 0xC040B340); 76 c = gg(c, d, a, b, messageAsInt[i + 11], 14, 0x265E5A51); 77 b = gg(b, c, d, a, messageAsInt[i + 0], 20, 0xE9B6C7AA); 78 a = gg(a, b, c, d, messageAsInt[i + 5], 5, 0xD62F105D); 79 d = gg(d, a, b, c, messageAsInt[i + 10], 9, 0x02441453); 80 c = gg(c, d, a, b, messageAsInt[i + 15], 14, 0xD8A1E681); 81 b = gg(b, c, d, a, messageAsInt[i + 4], 20, 0xE7D3FBC8); 82 a = gg(a, b, c, d, messageAsInt[i + 9], 5, 0x21E1CDE6); 83 d = gg(d, a, b, c, messageAsInt[i + 14], 9, 0xC33707D6); 84 c = gg(c, d, a, b, messageAsInt[i + 3], 14, 0xF4D50D87); 85 b = gg(b, c, d, a, messageAsInt[i + 8], 20, 0x455A14ED); 86 a = gg(a, b, c, d, messageAsInt[i + 13], 5, 0xA9E3E905); 87 d = gg(d, a, b, c, messageAsInt[i + 2], 9, 0xFCEFA3F8); 88 c = gg(c, d, a, b, messageAsInt[i + 7], 14, 0x676F02D9); 89 b = gg(b, c, d, a, messageAsInt[i + 12], 20, 0x8D2A4C8A); 90 91 a = hh(a, b, c, d, messageAsInt[i + 5], 4, 0xFFFA3942); 92 d = hh(d, a, b, c, messageAsInt[i + 8], 11, 0x8771F681); 93 c = hh(c, d, a, b, messageAsInt[i + 11], 16, 0x6D9D6122); 94 b = hh(b, c, d, a, messageAsInt[i + 14], 23, 0xFDE5380C); 95 a = hh(a, b, c, d, messageAsInt[i + 1], 4, 0xA4BEEA44); 96 d = hh(d, a, b, c, messageAsInt[i + 4], 11, 0x4BDECFA9); 97 c = hh(c, d, a, b, messageAsInt[i + 7], 16, 0xF6BB4B60); 98 b = hh(b, c, d, a, messageAsInt[i + 10], 23, 0xBEBFBC70); 99 a = hh(a, b, c, d, messageAsInt[i + 13], 4, 0x289B7EC6); 100 d = hh(d, a, b, c, messageAsInt[i + 0], 11, 0xEAA127FA); 101 c = hh(c, d, a, b, messageAsInt[i + 3], 16, 0xD4EF3085); 102 b = hh(b, c, d, a, messageAsInt[i + 6], 23, 0x04881D05); 103 a = hh(a, b, c, d, messageAsInt[i + 9], 4, 0xD9D4D039); 104 d = hh(d, a, b, c, messageAsInt[i + 12], 11, 0xE6DB99E5); 105 c = hh(c, d, a, b, messageAsInt[i + 15], 16, 0x1FA27CF8); 106 b = hh(b, c, d, a, messageAsInt[i + 2], 23, 0xC4AC5665); 107 108 a = ii(a, b, c, d, messageAsInt[i + 0], 6, 0xF4292244); 109 d = ii(d, a, b, c, messageAsInt[i + 7], 10, 0x432AFF97); 110 c = ii(c, d, a, b, messageAsInt[i + 14], 15, 0xAB9423A7); 111 b = ii(b, c, d, a, messageAsInt[i + 5], 21, 0xFC93A039); 112 a = ii(a, b, c, d, messageAsInt[i + 12], 6, 0x655B59C3); 113 d = ii(d, a, b, c, messageAsInt[i + 3], 10, 0x8F0CCC92); 114 c = ii(c, d, a, b, messageAsInt[i + 10], 15, 0xFFEFF47D); 115 b = ii(b, c, d, a, messageAsInt[i + 1], 21, 0x85845DD1); 116 a = ii(a, b, c, d, messageAsInt[i + 8], 6, 0x6FA87E4F); 117 d = ii(d, a, b, c, messageAsInt[i + 15], 10, 0xFE2CE6E0); 118 c = ii(c, d, a, b, messageAsInt[i + 6], 15, 0xA3014314); 119 b = ii(b, c, d, a, messageAsInt[i + 13], 21, 0x4E0811A1); 120 a = ii(a, b, c, d, messageAsInt[i + 4], 6, 0xF7537E82); 121 d = ii(d, a, b, c, messageAsInt[i + 11], 10, 0xBD3AF235); 122 c = ii(c, d, a, b, messageAsInt[i + 2], 15, 0x2AD7D2BB); 123 b = ii(b, c, d, a, messageAsInt[i + 9], 21, 0xEB86D391); 124 125 a = addInteger_wrappingAt32(a, variable_a); 126 b = addInteger_wrappingAt32(b, variable_b); 127 c = addInteger_wrappingAt32(c, variable_c); 128 d = addInteger_wrappingAt32(d, variable_d); 129 } 130 return new int[] { a, b, c, d }; 131 } 132 133 137 private int core_operation(int q, int a, int b, int x, int s, int t) { 138 return addInteger_wrappingAt32(bitwiseRotate32BitNumberLeft( 139 addInteger_wrappingAt32(addInteger_wrappingAt32(a, q), 140 addInteger_wrappingAt32(x, t)), s), b); 141 } 142 143 private int ff(int a, int b, int c, int d, int x, int s, int t) { 144 return core_operation(f(b, c, d), a, b, x, s, t); 145 } 146 147 151 private int f(int b, int c, int d) { 152 return (b & c) | ((~b) & d); 153 } 154 155 private int gg(int a, int b, int c, int d, int x, int s, int t) { 156 return core_operation(g(b, c, d), a, b, x, s, t); 157 } 158 159 163 private int g(int b, int c, int d) { 164 return (b & d) | (c & (~d)); 165 } 166 167 private int hh(int a, int b, int c, int d, int x, int s, int t) { 168 return core_operation(h(b, c, d), a, b, x, s, t); 169 } 170 171 175 private int h(int b, int c, int d) { 176 return b ^ c ^ d; 177 } 178 179 private int ii(int a, int b, int c, int d, int x, int s, int t) { 180 return core_operation(i(b, c, d), a, b, x, s, t); 181 } 182 183 187 private int i(int b, int c, int d) { 188 return c ^ (b | (~d)); 189 } 190 191 198 private int[] string2integer_padding(String incomingString) { 199 int i = 0; 200 int block = ((incomingString.length() + 8) >> 6) + 1; 201 int[] padded = new int[block * 16]; 202 for (i = 0; i < block * 16; i++) { 203 padded[i] = 0; 204 } 205 for (i = 0; i < incomingString.length(); i++) { 206 padded[i >> 2] |= incomingString.charAt(i) << ((i % 4) * 8); 207 } 208 padded[i >> 2] |= 0x80 << ((i % 4) * 8); 209 padded[block * 16 - 2] = incomingString.length() * 8; 210 211 return padded; 212 } 213 214 private int addInteger_wrappingAt32(int x, int y) { 215 return ((x & 0x7FFFFFFF) + (y & 0x7FFFFFFF)) ^ (x & 0x80000000) 216 ^ (y & 0x80000000); 217 } 218 219 private int bitwiseRotate32BitNumberLeft(int number, int p) { 220 return (number << p) | (number >>> (32 - p)); 221 } 222 223 } 224 225 226 227 | Popular Tags |