You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
899 B
34 lines
899 B
'use strict';
|
|
|
|
/**
|
|
* Masks a buffer using the given mask.
|
|
*
|
|
* @param {Buffer} source The buffer to mask
|
|
* @param {Buffer} mask The mask to use
|
|
* @param {Buffer} output The buffer where to store the result
|
|
* @param {Number} offset The offset at which to start writing
|
|
* @param {Number} length The number of bytes to mask.
|
|
* @public
|
|
*/
|
|
const mask = (source, mask, output, offset, length) => {
|
|
for (var i = 0; i < length; i++) {
|
|
output[offset + i] = source[i] ^ mask[i & 3];
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Unmasks a buffer using the given mask.
|
|
*
|
|
* @param {Buffer} buffer The buffer to unmask
|
|
* @param {Buffer} mask The mask to use
|
|
* @public
|
|
*/
|
|
const unmask = (buffer, mask) => {
|
|
// Required until https://github.com/nodejs/node/issues/9006 is resolved.
|
|
const length = buffer.length;
|
|
for (var i = 0; i < length; i++) {
|
|
buffer[i] ^= mask[i & 3];
|
|
}
|
|
};
|
|
|
|
module.exports = { mask, unmask };
|