/usr/lib/nodejs/browserify-aes/modes/ofb.js is in node-browserify-aes 1.1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | var xor = require('buffer-xor')
function getBlock (self) {
self._prev = self._cipher.encryptBlock(self._prev)
return self._prev
}
exports.encrypt = function (self, chunk) {
while (self._cache.length < chunk.length) {
self._cache = Buffer.concat([self._cache, getBlock(self)])
}
var pad = self._cache.slice(0, chunk.length)
self._cache = self._cache.slice(chunk.length)
return xor(chunk, pad)
}
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