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Updated XOR to include Cascade scheme

feature-extract-files
George J 2018-08-24 22:33:24 +01:00
parent 5aa13f2428
commit 70d4e3394c
2 changed files with 3 additions and 2 deletions
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1
src/core/lib/BitwiseOp.mjs
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@ -25,6 +25,7 @@ export function bitOp (input, key, func, nullPreserving, scheme) {
for (let i = 0; i < input.length; i++) {
k = key[i % key.length];
if (scheme === "Cascade") k = input[i + 1] || 0;
o = input[i];
x = nullPreserving && (o === 0 || o === k) ? o : func(o, k);
result.push(x);

4
src/core/operations/XOR.mjs
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@ -21,7 +21,7 @@ class XOR extends Operation {
this.name = "XOR";
this.module = "Default";
this.description = "XOR the input with the given key.<br>e.g. <code>fe023da5</code><br><br><strong>Options</strong><br><u>Null preserving:</u> If the current byte is 0x00 or the same as the key, skip it.<br><br><u>Scheme:</u><ul><li>Standard - key is unchanged after each round</li><li>Input differential - key is set to the value of the previous unprocessed byte</li><li>Output differential - key is set to the value of the previous processed byte</li></ul>";
this.description = "XOR the input with the given key.<br>e.g. <code>fe023da5</code><br><br><strong>Options</strong><br><u>Null preserving:</u> If the current byte is 0x00 or the same as the key, skip it.<br><br><u>Scheme:</u><ul><li>Standard - key is unchanged after each round</li><li>Input differential - key is set to the value of the previous unprocessed byte</li><li>Output differential - key is set to the value of the previous processed byte</li><li>Cascade - key is set to the input byte shifted by one</li></ul>";
this.infoURL = "https://wikipedia.org/wiki/XOR";
this.inputType = "byteArray";
this.outputType = "byteArray";
@ -35,7 +35,7 @@ class XOR extends Operation {
{
"name": "Scheme",
"type": "option",
"value": ["Standard", "Input differential", "Output differential"]
"value": ["Standard", "Input differential", "Output differential", "Cascade"]
},
{
"name": "Null preserving",