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DesEncryption.js
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DesEncryption.js
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function des(key, message, encrypt, mode, iv, padding) {
//declaring this locally speeds things up a bit
var spfunction1 = new Array(
0x1010400,
0,
0x10000,
0x1010404,
0x1010004,
0x10404,
0x4,
0x10000,
0x400,
0x1010400,
0x1010404,
0x400,
0x1000404,
0x1010004,
0x1000000,
0x4,
0x404,
0x1000400,
0x1000400,
0x10400,
0x10400,
0x1010000,
0x1010000,
0x1000404,
0x10004,
0x1000004,
0x1000004,
0x10004,
0,
0x404,
0x10404,
0x1000000,
0x10000,
0x1010404,
0x4,
0x1010000,
0x1010400,
0x1000000,
0x1000000,
0x400,
0x1010004,
0x10000,
0x10400,
0x1000004,
0x400,
0x4,
0x1000404,
0x10404,
0x1010404,
0x10004,
0x1010000,
0x1000404,
0x1000004,
0x404,
0x10404,
0x1010400,
0x404,
0x1000400,
0x1000400,
0,
0x10004,
0x10400,
0,
0x1010004
);
var spfunction2 = new Array(
-0x7fef7fe0,
-0x7fff8000,
0x8000,
0x108020,
0x100000,
0x20,
-0x7fefffe0,
-0x7fff7fe0,
-0x7fffffe0,
-0x7fef7fe0,
-0x7fef8000,
-0x80000000,
-0x7fff8000,
0x100000,
0x20,
-0x7fefffe0,
0x108000,
0x100020,
-0x7fff7fe0,
0,
-0x80000000,
0x8000,
0x108020,
-0x7ff00000,
0x100020,
-0x7fffffe0,
0,
0x108000,
0x8020,
-0x7fef8000,
-0x7ff00000,
0x8020,
0,
0x108020,
-0x7fefffe0,
0x100000,
-0x7fff7fe0,
-0x7ff00000,
-0x7fef8000,
0x8000,
-0x7ff00000,
-0x7fff8000,
0x20,
-0x7fef7fe0,
0x108020,
0x20,
0x8000,
-0x80000000,
0x8020,
-0x7fef8000,
0x100000,
-0x7fffffe0,
0x100020,
-0x7fff7fe0,
-0x7fffffe0,
0x100020,
0x108000,
0,
-0x7fff8000,
0x8020,
-0x80000000,
-0x7fefffe0,
-0x7fef7fe0,
0x108000
);
var spfunction3 = new Array(
0x208,
0x8020200,
0,
0x8020008,
0x8000200,
0,
0x20208,
0x8000200,
0x20008,
0x8000008,
0x8000008,
0x20000,
0x8020208,
0x20008,
0x8020000,
0x208,
0x8000000,
0x8,
0x8020200,
0x200,
0x20200,
0x8020000,
0x8020008,
0x20208,
0x8000208,
0x20200,
0x20000,
0x8000208,
0x8,
0x8020208,
0x200,
0x8000000,
0x8020200,
0x8000000,
0x20008,
0x208,
0x20000,
0x8020200,
0x8000200,
0,
0x200,
0x20008,
0x8020208,
0x8000200,
0x8000008,
0x200,
0,
0x8020008,
0x8000208,
0x20000,
0x8000000,
0x8020208,
0x8,
0x20208,
0x20200,
0x8000008,
0x8020000,
0x8000208,
0x208,
0x8020000,
0x20208,
0x8,
0x8020008,
0x20200
);
var spfunction4 = new Array(
0x802001,
0x2081,
0x2081,
0x80,
0x802080,
0x800081,
0x800001,
0x2001,
0,
0x802000,
0x802000,
0x802081,
0x81,
0,
0x800080,
0x800001,
0x1,
0x2000,
0x800000,
0x802001,
0x80,
0x800000,
0x2001,
0x2080,
0x800081,
0x1,
0x2080,
0x800080,
0x2000,
0x802080,
0x802081,
0x81,
0x800080,
0x800001,
0x802000,
0x802081,
0x81,
0,
0,
0x802000,
0x2080,
0x800080,
0x800081,
0x1,
0x802001,
0x2081,
0x2081,
0x80,
0x802081,
0x81,
0x1,
0x2000,
0x800001,
0x2001,
0x802080,
0x800081,
0x2001,
0x2080,
0x800000,
0x802001,
0x80,
0x800000,
0x2000,
0x802080
);
var spfunction5 = new Array(
0x100,
0x2080100,
0x2080000,
0x42000100,
0x80000,
0x100,
0x40000000,
0x2080000,
0x40080100,
0x80000,
0x2000100,
0x40080100,
0x42000100,
0x42080000,
0x80100,
0x40000000,
0x2000000,
0x40080000,
0x40080000,
0,
0x40000100,
0x42080100,
0x42080100,
0x2000100,
0x42080000,
0x40000100,
0,
0x42000000,
0x2080100,
0x2000000,
0x42000000,
0x80100,
0x80000,
0x42000100,
0x100,
0x2000000,
0x40000000,
0x2080000,
0x42000100,
0x40080100,
0x2000100,
0x40000000,
0x42080000,
0x2080100,
0x40080100,
0x100,
0x2000000,
0x42080000,
0x42080100,
0x80100,
0x42000000,
0x42080100,
0x2080000,
0,
0x40080000,
0x42000000,
0x80100,
0x2000100,
0x40000100,
0x80000,
0,
0x40080000,
0x2080100,
0x40000100
);
var spfunction6 = new Array(
0x20000010,
0x20400000,
0x4000,
0x20404010,
0x20400000,
0x10,
0x20404010,
0x400000,
0x20004000,
0x404010,
0x400000,
0x20000010,
0x400010,
0x20004000,
0x20000000,
0x4010,
0,
0x400010,
0x20004010,
0x4000,
0x404000,
0x20004010,
0x10,
0x20400010,
0x20400010,
0,
0x404010,
0x20404000,
0x4010,
0x404000,
0x20404000,
0x20000000,
0x20004000,
0x10,
0x20400010,
0x404000,
0x20404010,
0x400000,
0x4010,
0x20000010,
0x400000,
0x20004000,
0x20000000,
0x4010,
0x20000010,
0x20404010,
0x404000,
0x20400000,
0x404010,
0x20404000,
0,
0x20400010,
0x10,
0x4000,
0x20400000,
0x404010,
0x4000,
0x400010,
0x20004010,
0,
0x20404000,
0x20000000,
0x400010,
0x20004010
);
var spfunction7 = new Array(
0x200000,
0x4200002,
0x4000802,
0,
0x800,
0x4000802,
0x200802,
0x4200800,
0x4200802,
0x200000,
0,
0x4000002,
0x2,
0x4000000,
0x4200002,
0x802,
0x4000800,
0x200802,
0x200002,
0x4000800,
0x4000002,
0x4200000,
0x4200800,
0x200002,
0x4200000,
0x800,
0x802,
0x4200802,
0x200800,
0x2,
0x4000000,
0x200800,
0x4000000,
0x200800,
0x200000,
0x4000802,
0x4000802,
0x4200002,
0x4200002,
0x2,
0x200002,
0x4000000,
0x4000800,
0x200000,
0x4200800,
0x802,
0x200802,
0x4200800,
0x802,
0x4000002,
0x4200802,
0x4200000,
0x200800,
0,
0x2,
0x4200802,
0,
0x200802,
0x4200000,
0x800,
0x4000002,
0x4000800,
0x800,
0x200002
);
var spfunction8 = new Array(
0x10001040,
0x1000,
0x40000,
0x10041040,
0x10000000,
0x10001040,
0x40,
0x10000000,
0x40040,
0x10040000,
0x10041040,
0x41000,
0x10041000,
0x41040,
0x1000,
0x40,
0x10040000,
0x10000040,
0x10001000,
0x1040,
0x41000,
0x40040,
0x10040040,
0x10041000,
0x1040,
0,
0,
0x10040040,
0x10000040,
0x10001000,
0x41040,
0x40000,
0x41040,
0x40000,
0x10041000,
0x1000,
0x40,
0x10040040,
0x1000,
0x41040,
0x10001000,
0x40,
0x10000040,
0x10040000,
0x10040040,
0x10000000,
0x40000,
0x10001040,
0,
0x10041040,
0x40040,
0x10000040,
0x10040000,
0x10001000,
0x10001040,
0,
0x10041040,
0x41000,
0x41000,
0x1040,
0x1040,
0x40040,
0x10000000,
0x10041000
);
//create the 16 or 48 subkeys we will need
var keys = des_createKeys(key);
var m = 0,
i,
j,
temp,
temp2,
right1,
right2,
left,
right,
looping;
var cbcleft, cbcleft2, cbcright, cbcright2;
var endloop, loopinc;
var len = message.length;
var chunk = 0;
//set up the loops for single and triple des
var iterations = keys.length == 32 ? 3 : 9; //single or triple des
if (iterations == 3) {
looping = encrypt ? new Array(0, 32, 2) : new Array(30, -2, -2);
} else {
looping = encrypt
? new Array(0, 32, 2, 62, 30, -2, 64, 96, 2)
: new Array(94, 62, -2, 32, 64, 2, 30, -2, -2);
}
//pad the message depending on the padding parameter
if (padding == 2) message += ' ';
//pad the message with spaces
else if (padding == 1) {
temp = 8 - (len % 8);
message += String.fromCharCode(
temp,
temp,
temp,
temp,
temp,
temp,
temp,
temp
);
if (temp == 8) len += 8;
} //PKCS7 padding
else if (!padding) message += '\0\0\0\0\0\0\0\0'; //pad the message out with null bytes
//store the result here
result = '';
tempresult = '';
if (mode == 1) {
//CBC mode
cbcleft =
(iv.charCodeAt(m++) << 24) |
(iv.charCodeAt(m++) << 16) |
(iv.charCodeAt(m++) << 8) |
iv.charCodeAt(m++);
cbcright =
(iv.charCodeAt(m++) << 24) |
(iv.charCodeAt(m++) << 16) |
(iv.charCodeAt(m++) << 8) |
iv.charCodeAt(m++);
m = 0;
}
//loop through each 64 bit chunk of the message
while (m < len) {
left =
(message.charCodeAt(m++) << 24) |
(message.charCodeAt(m++) << 16) |
(message.charCodeAt(m++) << 8) |
message.charCodeAt(m++);
right =
(message.charCodeAt(m++) << 24) |
(message.charCodeAt(m++) << 16) |
(message.charCodeAt(m++) << 8) |
message.charCodeAt(m++);
//for Cipher Block Chaining mode, xor the message with the previous result
if (mode == 1) {
if (encrypt) {
left ^= cbcleft;
right ^= cbcright;
} else {
cbcleft2 = cbcleft;
cbcright2 = cbcright;
cbcleft = left;
cbcright = right;
}
}
//first each 64 but chunk of the message must be permuted according to IP
temp = ((left >>> 4) ^ right) & 0x0f0f0f0f;
right ^= temp;
left ^= temp << 4;
temp = ((left >>> 16) ^ right) & 0x0000ffff;
right ^= temp;
left ^= temp << 16;
temp = ((right >>> 2) ^ left) & 0x33333333;
left ^= temp;
right ^= temp << 2;
temp = ((right >>> 8) ^ left) & 0x00ff00ff;
left ^= temp;
right ^= temp << 8;
temp = ((left >>> 1) ^ right) & 0x55555555;
right ^= temp;
left ^= temp << 1;
left = (left << 1) | (left >>> 31);
right = (right << 1) | (right >>> 31);
//do this either 1 or 3 times for each chunk of the message
for (j = 0; j < iterations; j += 3) {
endloop = looping[j + 1];
loopinc = looping[j + 2];
//now go through and perform the encryption or decryption
for (i = looping[j]; i != endloop; i += loopinc) {
//for efficiency
right1 = right ^ keys[i];
right2 = ((right >>> 4) | (right << 28)) ^ keys[i + 1];
//the result is attained by passing these bytes through the S selection functions
temp = left;
left = right;
right =
temp ^
(spfunction2[(right1 >>> 24) & 0x3f] |
spfunction4[(right1 >>> 16) & 0x3f] |
spfunction6[(right1 >>> 8) & 0x3f] |
spfunction8[right1 & 0x3f] |
spfunction1[(right2 >>> 24) & 0x3f] |
spfunction3[(right2 >>> 16) & 0x3f] |
spfunction5[(right2 >>> 8) & 0x3f] |
spfunction7[right2 & 0x3f]);
}
temp = left;
left = right;
right = temp; //unreverse left and right
} //for either 1 or 3 iterations
//move then each one bit to the right
left = (left >>> 1) | (left << 31);
right = (right >>> 1) | (right << 31);
//now perform IP-1, which is IP in the opposite direction
temp = ((left >>> 1) ^ right) & 0x55555555;
right ^= temp;
left ^= temp << 1;
temp = ((right >>> 8) ^ left) & 0x00ff00ff;
left ^= temp;
right ^= temp << 8;
temp = ((right >>> 2) ^ left) & 0x33333333;
left ^= temp;
right ^= temp << 2;
temp = ((left >>> 16) ^ right) & 0x0000ffff;
right ^= temp;
left ^= temp << 16;
temp = ((left >>> 4) ^ right) & 0x0f0f0f0f;
right ^= temp;
left ^= temp << 4;
//for Cipher Block Chaining mode, xor the message with the previous result
if (mode == 1) {
if (encrypt) {
cbcleft = left;
cbcright = right;
} else {
left ^= cbcleft2;
right ^= cbcright2;
}
}
tempresult += String.fromCharCode(
left >>> 24,
(left >>> 16) & 0xff,
(left >>> 8) & 0xff,
left & 0xff,
right >>> 24,
(right >>> 16) & 0xff,
(right >>> 8) & 0xff,
right & 0xff
);
chunk += 8;
if (chunk == 512) {
result += tempresult;
tempresult = '';
chunk = 0;
}
} //for every 8 characters, or 64 bits in the message
//return the result as an array
return result + tempresult;
} //end of des
//des_createKeys
//this takes as input a 64 bit key (even though only 56 bits are used)
//as an array of 2 integers, and returns 16 48 bit keys
function des_createKeys(key) {
//declaring this locally speeds things up a bit
pc2bytes0 = new Array(
0,
0x4,
0x20000000,
0x20000004,
0x10000,
0x10004,
0x20010000,
0x20010004,
0x200,
0x204,
0x20000200,
0x20000204,
0x10200,
0x10204,
0x20010200,
0x20010204
);
pc2bytes1 = new Array(
0,
0x1,
0x100000,
0x100001,
0x4000000,
0x4000001,
0x4100000,
0x4100001,
0x100,
0x101,
0x100100,
0x100101,
0x4000100,
0x4000101,
0x4100100,
0x4100101
);
pc2bytes2 = new Array(
0,
0x8,
0x800,
0x808,
0x1000000,
0x1000008,
0x1000800,
0x1000808,
0,
0x8,
0x800,
0x808,
0x1000000,
0x1000008,
0x1000800,
0x1000808
);
pc2bytes3 = new Array(
0,
0x200000,
0x8000000,
0x8200000,
0x2000,
0x202000,
0x8002000,
0x8202000,
0x20000,
0x220000,
0x8020000,
0x8220000,
0x22000,
0x222000,
0x8022000,
0x8222000
);
pc2bytes4 = new Array(
0,
0x40000,
0x10,
0x40010,
0,
0x40000,
0x10,
0x40010,
0x1000,
0x41000,
0x1010,
0x41010,
0x1000,
0x41000,
0x1010,
0x41010
);
pc2bytes5 = new Array(
0,
0x400,
0x20,
0x420,
0,
0x400,
0x20,
0x420,
0x2000000,
0x2000400,
0x2000020,
0x2000420,
0x2000000,
0x2000400,
0x2000020,
0x2000420
);
pc2bytes6 = new Array(
0,
0x10000000,
0x80000,
0x10080000,
0x2,
0x10000002,
0x80002,
0x10080002,
0,
0x10000000,
0x80000,
0x10080000,
0x2,
0x10000002,
0x80002,
0x10080002
);
pc2bytes7 = new Array(
0,
0x10000,
0x800,
0x10800,
0x20000000,
0x20010000,
0x20000800,
0x20010800,
0x20000,
0x30000,
0x20800,
0x30800,
0x20020000,
0x20030000,
0x20020800,
0x20030800
);
pc2bytes8 = new Array(
0,
0x40000,
0,
0x40000,
0x2,
0x40002,
0x2,
0x40002,
0x2000000,
0x2040000,
0x2000000,
0x2040000,
0x2000002,
0x2040002,
0x2000002,
0x2040002
);
pc2bytes9 = new Array(
0,
0x10000000,
0x8,
0x10000008,
0,
0x10000000,
0x8,
0x10000008,
0x400,
0x10000400,
0x408,
0x10000408,
0x400,
0x10000400,
0x408,
0x10000408
);
pc2bytes10 = new Array(
0,
0x20,
0,
0x20,
0x100000,
0x100020,
0x100000,
0x100020,
0x2000,
0x2020,
0x2000,
0x2020,
0x102000,
0x102020,
0x102000,
0x102020
);
pc2bytes11 = new Array(
0,
0x1000000,
0x200,
0x1000200,
0x200000,
0x1200000,
0x200200,
0x1200200,
0x4000000,
0x5000000,
0x4000200,
0x5000200,
0x4200000,
0x5200000,
0x4200200,
0x5200200
);
pc2bytes12 = new Array(
0,
0x1000,
0x8000000,
0x8001000,
0x80000,
0x81000,
0x8080000,
0x8081000,
0x10,
0x1010,
0x8000010,
0x8001010,
0x80010,
0x81010,
0x8080010,
0x8081010
);
pc2bytes13 = new Array(
0,
0x4,
0x100,
0x104,
0,
0x4,
0x100,
0x104,
0x1,
0x5,
0x101,
0x105,
0x1,
0x5,
0x101,
0x105
);
//how many iterations (1 for des, 3 for triple des)
var iterations = key.length > 8 ? 3 : 1; //changed by Paul 16/6/2007 to use Triple DES for 9+ byte keys
//stores the return keys
var keys = new Array(32 * iterations);
//now define the left shifts which need to be done
var shifts = new Array(0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
//other variables
var lefttemp,
righttemp,
m = 0,
n = 0,
temp;
for (var j = 0; j < iterations; j++) {
//either 1 or 3 iterations
left =
(key.charCodeAt(m++) << 24) |
(key.charCodeAt(m++) << 16) |
(key.charCodeAt(m++) << 8) |