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Added differential schemes to 'XOR Brute Force' operation

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This commit is contained in:
n1474335 2017-07-18 16:09:22 +00:00
parent cda557e1b9
commit 38792a0f02
2 changed files with 26 additions and 26 deletions
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24
src/core/config/OperationConfig.js
View File

@ -330,30 +330,25 @@ const OperationConfig = {
value: BitwiseOp.XOR_BRUTE_KEY_LENGTH
},
{
name: "Length of sample",
name: "Sample length",
type: "number",
value: BitwiseOp.XOR_BRUTE_SAMPLE_LENGTH
},
{
name: "Offset of sample",
name: "Sample offset",
type: "number",
value: BitwiseOp.XOR_BRUTE_SAMPLE_OFFSET
},
{
name: "Scheme",
type: "option",
value: BitwiseOp.XOR_SCHEME
},
{
name: "Null preserving",
type: "boolean",
value: BitwiseOp.XOR_PRESERVE_NULLS
},
{
name: "Differential",
type: "boolean",
value: BitwiseOp.XOR_DIFFERENTIAL
},
{
name: "Crib (known plaintext string)",
type: "binaryString",
value: ""
},
{
name: "Print key",
type: "boolean",
@ -363,6 +358,11 @@ const OperationConfig = {
name: "Output as hex",
type: "boolean",
value: BitwiseOp.XOR_BRUTE_OUTPUT_HEX
},
{
name: "Crib (known plaintext string)",
type: "binaryString",
value: ""
}
]
},

28
src/core/operations/BitwiseOp.js
View File

@ -36,7 +36,9 @@ const BitwiseOp = {
o = input[i];
x = nullPreserving && (o === 0 || o === k) ? o : func(o, k);
result.push(x);
if (scheme !== "Standard" && !(nullPreserving && (o === 0 || o === k))) {
if (scheme &&
scheme !== "Standard" &&
!(nullPreserving && (o === 0 || o === k))) {
switch (scheme) {
case "Input differential":
key[i % key.length] = x;
@ -120,19 +122,19 @@ const BitwiseOp = {
* @returns {string}
*/
runXorBrute: function (input, args) {
let keyLength = parseInt(args[0], 10),
const keyLength = parseInt(args[0], 10),
sampleLength = args[1],
sampleOffset = args[2],
nullPreserving = args[3],
differential = args[4],
crib = args[5],
printKey = args[6],
outputHex = args[7],
regex;
scheme = args[3],
nullPreserving = args[4],
printKey = args[5],
outputHex = args[6],
crib = args[7];
let output = "",
result,
resultUtf8;
resultUtf8,
regex;
input = input.slice(sampleOffset, sampleOffset + sampleLength);
@ -142,14 +144,12 @@ const BitwiseOp = {
for (let key = 1, l = Math.pow(256, keyLength); key < l; key++) {
result = BitwiseOp._bitOp(input, Utils.fromHex(key.toString(16)), BitwiseOp._xor, nullPreserving, differential);
result = BitwiseOp._bitOp(input, Utils.fromHex(key.toString(16)), BitwiseOp._xor, nullPreserving, scheme);
resultUtf8 = Utils.byteArrayToUtf8(result);
if (crib !== "" && resultUtf8.search(regex) === -1) continue;
if (printKey) output += "Key = " + Utils.hex(key, (2*keyLength)) + ": ";
if (outputHex)
output += Utils.toHex(result) + "\n";
else
output += Utils.printable(resultUtf8, false) + "\n";
if (outputHex) output += Utils.toHex(result) + "\n";
else output += Utils.printable(resultUtf8, false) + "\n";
if (printKey) output += "\n";
}
return output;