Hey, Thanks for detailed explanations of IOCipher internals. I appreciate that!
- Dominik On 02/23/2016 06:46 PM, Hans-Christoph Steiner wrote: > > > Nathan of Guardian: >> >> >> On Tue, Feb 23, 2016, at 10:14 AM, Dominik Schuermann wrote: >>> Is there a way in general to store blobs over 1MB inside Android's >>> default SQLite? At OpenKeychain we reached that limit, and I don't like >>> to redesign everything just because of this corner case: >>> https://github.com/open-keychain/open-keychain/issues/1714 >>> >>> I am open for suggestions :) Maybe you guys have an idea, how is this >>> done in IOCipher? >> >> IOCipher does this automatically. It was the reason we developed it - to >> securely store large media files for apps like CameraV and Courier. It >> works well enough that you can stream into it, which we do for recording >> or playing back video and audio. >> >> Hans made the brilliant discovery of Libsqlfs: >> https://github.com/guardianproject/libsqlfs >> that was originally built for Palm OS. >> >> IOCipher = SQLCipher + Libsqlfs + a java.io.File-style API. >> >> +n > > sqlfs works like many filesystems and stores files in blocks. In > IOCipher, an 8192 byte block size is used. So SQLite only ever sees > 8192 byte binary blobs. > > .hc > >
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