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 sig2

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 headers

 inner_headers

 meta

 binaries

 deleted_objects

    Hash of UUIDs for objects that have been deleted. This includes groups,
    entries and even custom icons.

 raw

    Bytes contained within the encrypted layer of a KDBX file. This is only
    set when using File::KDBX::Loader::Raw.

 comment

    A text string associated with the database stored unencrypted in the
    file header. Often unset.

 cipher_id

    The UUID of a cipher used to encrypt the database when stored as a
    file.

    See File::KDBX::Cipher.

 compression_flags

    Configuration for whether or not and how the database gets compressed.
    See ":compression" in File::KDBX::Constants.

 master_seed

    The master seed is a string of 32 random bytes that is used as salt in
    hashing the master key when loading and saving the database. If a
    challenge-response key is used in the master key, the master seed is
    also the challenge.

    The master seed should be changed each time the database is saved to
    file.

 transform_seed

    The transform seed is a string of 32 random bytes that is used in the
    key derivation function, either as the salt or the key (depending on
    the algorithm).

    The transform seed should be changed each time the database is saved to
    file.

 transform_rounds

    The number of rounds or iterations used in the key derivation function.
    Increasing this number makes loading and saving the database slower in
    order to make dictionary and brute force attacks more costly.

 encryption_iv

    The initialization vector used by the cipher.

    The encryption IV should be changed each time the database is saved to
    file.

 inner_random_stream_key

    The encryption key (possibly including the IV, depending on the cipher)
    used to encrypt the protected strings within the database.

 stream_start_bytes

    A string of 32 random bytes written in the header and encrypted in the
    body. If the bytes do not match when loading a file then the wrong
    master key was used or the file is corrupt. Only KDBX 2 and KDBX 3
    files use this. KDBX 4 files use an improved HMAC method to verify the
    master key and data integrity of the header and entire file body.

 inner_random_stream_id

    A number indicating the cipher algorithm used to encrypt the protected
    strings within the database, usually Salsa20 or ChaCha20. See
    ":random_stream" in File::KDBX::Constants.

 kdf_parameters

    A hash/dict of key-value pairs used to configure the key derivation
    function. This is the KDBX4+ way to configure the KDF, superceding
    "transform_seed" and "transform_rounds".

 generator

    The name of the software used to generate the KDBX file.

 header_hash

    The header hash used to verify that the file header is not corrupt.
    (KDBX 2 - KDBX 3.1, removed KDBX 4.0)

 database_name

    Name of the database.

 database_name_changed

    Timestamp indicating when the database name was last changed.

 database_description

    Description of the database

 database_description_changed

    Timestamp indicating when the database description was last changed.