File size: 3,807 Bytes
7e9dc27 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | require("lockbox").insecure();
local Bit = require("lockbox.util.bit");
local String = require("string");
local Queue = require("lockbox.util.queue");
local SUBST = {
0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14 };
local AND = Bit.band;
local OR = Bit.bor;
local NOT = Bit.bnot;
local XOR = Bit.bxor;
local LROT = Bit.lrotate;
local RROT = Bit.rrotate;
local LSHIFT = Bit.lshift;
local RSHIFT = Bit.rshift;
local MD2 = function()
local queue = Queue();
local X = {};
for i=0,47 do
X[i] = 0x00;
end
local L = 0;
local C = {};
for i=0,15 do
C[i] = 0x00;
end
local public = {};
local processBlock = function()
local block = {};
for i=0,15 do
block[i] = queue.pop();
end
for i=0,15 do
X[i+16] = block[i];
X[i+32] = XOR(X[i],block[i]); --mix
end
local t;
--update block
t=0;
for i=0,17 do
for j=0,47 do
X[j] = XOR(X[j],SUBST[t+1]);
t = X[j];
end
t = (t+i) % 256;
end
--update checksum
t = C[15];
for i=0,15 do
C[i] = XOR(C[i],SUBST[XOR(block[i],t)+1]);
t = C[i];
end
end
public.init = function()
queue.reset();
X = {};
for i=0,47 do
X[i] = 0x00;
end
L = 0;
C = {};
for i=0,15 do
C[i] = 0x00;
end
return public;
end
public.update = function(stream)
for b in stream do
queue.push(b);
if(queue.size() >= 16) then processBlock(); end
end
return public;
end
public.finish = function()
local i = 16-queue.size();
while queue.size() < 16 do
queue.push(i);
end
processBlock();
queue.push(C[ 0]); queue.push(C[ 1]); queue.push(C[ 2]); queue.push(C[ 3]);
queue.push(C[ 4]); queue.push(C[ 5]); queue.push(C[ 6]); queue.push(C[ 7]);
queue.push(C[ 8]); queue.push(C[ 9]); queue.push(C[10]); queue.push(C[11]);
queue.push(C[12]); queue.push(C[13]); queue.push(C[14]); queue.push(C[15]);
processBlock();
return public;
end
public.asBytes = function()
return {X[ 0],X[ 1],X[ 2],X[ 3],X[ 4],X[ 5],X[ 6],X[ 7],
X[ 8],X[ 9],X[10],X[11],X[12],X[13],X[14],X[15]};
end
public.asHex = function()
return String.format("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
X[ 0],X[ 1],X[ 2],X[ 3],X[ 4],X[ 5],X[ 6],X[ 7],
X[ 8],X[ 9],X[10],X[11],X[12],X[13],X[14],X[15]);
end
return public;
end
return MD2;
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