| 1 | var xor = require('../xor');
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| 2 | exports.encrypt = function (self, data, decrypt) {
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| 3 | var out = new Buffer('');
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| 4 | var len;
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| 5 | while (data.length) {
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| 6 | if (self._cache.length === 0) {
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| 7 | self._cache = self._cipher.encryptBlock(self._prev);
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| 8 | self._prev = new Buffer('');
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| 9 | }
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| 10 | if (self._cache.length <= data.length) {
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| 11 | len = self._cache.length;
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| 12 | out = Buffer.concat([out, encryptStart(self, data.slice(0, len), decrypt)]);
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| 13 | data = data.slice(len);
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| 14 | } else {
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| 15 | out = Buffer.concat([out, encryptStart(self, data, decrypt)]);
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| 16 | break;
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| 17 | }
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| 18 | }
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| 19 | return out;
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| 20 | };
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| 21 | function encryptStart(self, data, decrypt) {
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| 22 | var len = data.length;
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| 23 | var out = xor(data, self._cache);
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| 24 | self._cache = self._cache.slice(len);
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| 25 | self._prev = Buffer.concat([self._prev, decrypt?data:out]);
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| 26 | return out;
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| 27 | } |
| \ | No newline at end of file |