package enigma

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Config is the backward compatible config of filesystem. The message is created in the init phase of enigma filesystem, and must remain immutable upon the execution of the filesystem.

• uint64 version = 1

  Version of the enigma filesystem config. The version must increment by 1 per modification. The config has backward compatibility, which means the filesystem engine must not attempt to open or modify the filesystem of newer version, while must support opening and modifying the one of older version one.

• bytes key = 2

  Key is the AES-256 key of the filesystem. The field must be of length 32 since it is an AES-256 key. Since protobuf does not support defining byte array of fixed length, an extra check of length will be done on this field.

• uint32 prefix_length = 3

  PrefixLength is the length of nonce prefixing the filename under each directories. The file names under each directories are protected by a nonce prefix which is calculated from the real file name and file name's length, through some pseudo random process involving the key eventually. The minimum value of this field is 1 and maximum value of this field is 8. Values exceeding this boundary will be clamped towards the boundary.