* begin adding encryption for remote pieces
* begin adding decryption
* add encryption key as arg to Put and Get
* move encryption/decryption to object store
* Add encryption key to object store constructor
* Add the erasure scheme to object store constructor
* Ensure decrypter is initialized with the stripe size used by encrypter
* Revert "Ensure decrypter is initialized with the stripe size used by encrypter"
This reverts commit 07272333f461606edfb43ad106cc152f37a3bd46.
* Revert "Add the erasure scheme to object store constructor"
This reverts commit ea5e793b536159d993b96e3db69a37c1656a193c.
* move encryption to stream store
* move decryption stuff to stream store
* revert changes in object store
* add encryptedBlockSize and close rangers on error during Get
* calculate padding sizes correctly
* encryptedBlockSize -> encryptionBlockSize
* pass encryption key and block size into stream store
* remove encryption key and block size from object store constructor
* move encrypter/decrypter initialization
* remove unnecessary cast
* Fix padding issue
* Fix linter
* add todos
* use random encryption key for data encryption. Store an encrypted copy of this key in segment metadata
* use different encryption key for each segment
* encrypt data in one step if it is small enough
* refactor and move encryption stuff
* fix errors related to nil slices passed to copy
* fix encrypter vs. decrypter bug
* put encryption stuff in eestream
* get captplanet test to pass
* fix linting errors
* add types for encryption keys/nonces and clean up
* fix tests
* more review changes
* add Cipher type for encryption stuff
* fix rs_test
* Simplify type casting of key and nonce
* Init starting nonce to the segment index
* don't copy derived key
* remove default encryption key; force user to explicitly set it
* move getSegmentPath to streams package
* dont require user to specify encryption key for captplanet
* rename GenericKey and GenericNonce to Key and Nonce
* review changes
* fix linting error
* Download uses the encryption type from metadata
* Store enc block size in metadata and use it for download
