| 1 | var xor = require('buffer-xor')
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| 2 |
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| 3 | function getBlock (self) {
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| 4 | self._prev = self._cipher.encryptBlock(self._prev)
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| 5 | return self._prev
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| 6 | }
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| 7 |
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| 8 | exports.encrypt = function (self, chunk) {
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| 9 | while (self._cache.length < chunk.length) {
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| 10 | self._cache = Buffer.concat([self._cache, getBlock(self)])
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| 11 | }
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| 12 |
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| 13 | var pad = self._cache.slice(0, chunk.length)
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| 14 | self._cache = self._cache.slice(chunk.length)
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| 15 | return xor(chunk, pad)
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| 16 | }
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