Sha256: 0283e5495735ce9220d68defc4504ec42d422d2234a7452dcf85dcbde829a762
Contents?: true
Size: 668 Bytes
Versions: 62
Compression:
Stored size: 668 Bytes
Contents
var xor = require('../xor');
function getBlock(self) {
var out = self._cipher.encryptBlock(self._prev);
incr32(self._prev);
return out;
}
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);
};
function incr32(iv) {
var len = iv.length;
var item;
while (len--) {
item = iv.readUInt8(len);
if (item === 255) {
iv.writeUInt8(0, len);
} else {
item++;
iv.writeUInt8(item, len);
break;
}
}
}
Version data entries
62 entries across 62 versions & 1 rubygems