Cool_Tools/CyberChef
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n1474335 2022-11-25 12:46:15 +00:00
parent 0fb3743b6d
commit 130e9d8192
1 changed files with 10 additions and 4 deletions
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14
src/core/operations/CMAC.mjs
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@ -49,11 +49,13 @@ class CMAC extends Operation {
*/
run(input, args) {
const key = Utils.convertToByteString(args[0].string, args[0].option);
const algo = args[1];
const info = (function() {
switch (args[1]) {
switch (algo) {
case "AES":
if (key.length !== 16 && key.length !== 24 && key.length !== 32) {
throw new OperationError("the key for AES must be either 16, 24, or 32 bytes (currently " + key.length + " bytes)");
throw new OperationError("The key for AES must be either 16, 24, or 32 bytes (currently " + key.length + " bytes)");
}
return {
"algorithm": "AES-ECB",
@ -63,7 +65,7 @@ class CMAC extends Operation {
};
case "Triple DES":
if (key.length !== 16 && key.length !== 24) {
throw new OperationError("the key for Triple DES must be 16 or 24 bytes (currently " + key.length + " bytes)");
throw new OperationError("The key for Triple DES must be 16 or 24 bytes (currently " + key.length + " bytes)");
}
return {
"algorithm": "3DES-ECB",
@ -72,9 +74,10 @@ class CMAC extends Operation {
"Rb": new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0x1b]),
};
default:
throw new OperationError("undefined encryption algorithm");
throw new OperationError("Undefined encryption algorithm");
}
})();
const xor = function(a, b, out) {
if (!out) out = new Uint8Array(a.length);
for (let i = 0; i < a.length; i++) {
@ -82,6 +85,7 @@ class CMAC extends Operation {
}
return out;
};
const leftShift1 = function(a) {
const out = new Uint8Array(a.length);
let carry = 0;
@ -91,6 +95,7 @@ class CMAC extends Operation {
}
return out;
};
const cipher = forge.cipher.createCipher(info.algorithm, info.key);
const encrypt = function(a, out) {
if (!out) out = new Uint8Array(a.length);
@ -127,6 +132,7 @@ class CMAC extends Operation {
return xor(data, K2, data);
}
})();
const X = new Uint8Array(info.blockSize);
const Y = new Uint8Array(info.blockSize);
for (let i = 0; i < n - 1; i++) {