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Ran 24 Sep 2019 02:17PM UTC

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Committed 24 Sep 2019 02:06PM UTC coverage: 77.909% (-0.04%) from 77.951%

Job # 2840.2

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push

travis-ci

Committed by

web-flow

Commit Message

Support encryption at rest  (#1042)

This PR will add support for encrypting data which going to be on disk.
Two components are being encrypted, one is sst and another one is
vlog. In sst, each block is encrypted with seperate IV using AES CTR
mode. In vlog, each entry is being encrypted. Each vlog will have base
IV of 12 bytes. IV for the each entry is generated by merging base IV 
with entry offset. Data are encrypted using datakey, which is generated by
the badger. The datakey is further encrypted using user provided key 
and stored in disk. So that user can change key. In order to change
key user has to provide old key and new key. we'll decrypt using old
key and store the datakey back to disk by encrypting using the new
key. By this mechanism, it'll simplfy the key change.

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