| 1 | var xor = require('buffer-xor')
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| 2 |
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| 3 | exports.encrypt = function (self, block) {
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| 4 | var data = xor(block, self._prev)
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| 5 |
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| 6 | self._prev = self._cipher.encryptBlock(data)
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| 7 | return self._prev
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| 8 | }
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| 9 |
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| 10 | exports.decrypt = function (self, block) {
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| 11 | var pad = self._prev
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| 12 |
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| 13 | self._prev = block
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| 14 | var out = self._cipher.decryptBlock(block)
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| 15 |
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| 16 | return xor(out, pad)
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| 17 | }
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