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BorgBackup - Backup dédupliqué
1e1d80c7b0
This has special and extremely fast HW acceleration on e.g recent Intel CPUs: AES-NI and PCLMULQDQ. Notes: a) I had to kill AES.iv method, it just did not work for aes-gcm as done by openssl. As the incremented IV (counter) can't be read back, we have to keep and manually increment it in Key.enc_iv. b) there is a hack in AES.compute_tag_and_encrypt to add 16B of zero to the right of the gmac (which is also 16B) because the current callers expects 32B. AES.check_tag_and_encrypt is tolerant of such a 32B tag, but will only use the left 16B and ignore the right 16B if needed. this is a bit dirty, but I didn't want to change the header layout within this changeset. c) switched from mac&encrypt to encrypt-then-mac (using aes-gcm) for the keyfile 'data' entry d) also added a test that creates the testdata needed for the constants at top of testsuite/key.py e) I kept enc_hmac_key although it is not used by the code in this changeset. But we'll need to keep supporting the old algorithms, too. |
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| attic | ||
| docs | ||
| scripts | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| AUTHORS | ||
| CHANGES | ||
| LICENSE | ||
| MANIFEST.in | ||
| README.rst | ||
| setup.py | ||
| tox.ini | ||
| versioneer.py | ||
What is Attic?
--------------
Attic is a deduplicating backup program. The main goal of Attic is to provide
an efficient and secure way to backup data. The data deduplication
technique used makes Attic suitable for daily backups since only changes
are stored.
Easy to use
~~~~~~~~~~~
Initialize backup repository and create a backup archive::
$ attic init /usbdrive/my-backup.attic
$ attic create -v /usbdrive/my-backup.attic::documents ~/Documents
Main features
~~~~~~~~~~~~~
Space efficient storage
Variable block size deduplication is used to reduce the number of bytes
stored by detecting redundant data. Each file is split into a number of
variable length chunks and only chunks that have never been seen before are
compressed and added to the repository.
Optional data encryption
All data can be protected using 256-bit AES encryption and data integrity
and authenticity is verified using HMAC-SHA256.
Off-site backups
Attic can store data on any remote host accessible over SSH. This is
most efficient if Attic is also installed on the remote host.
Backups mountable as filesystems
Backup archives are mountable as userspace filesystems for easy backup
verification and restores.
What do I need?
---------------
Attic requires Python 3.2 or above to work. Besides Python, Attic also requires
msgpack-python and sufficiently recent OpenSSL (>= 1.0.0).
In order to mount archives as filesystems, llfuse is required.
How do I install it?
--------------------
::
$ pip install Attic
Where are the docs?
-------------------
Go to https://attic-backup.org/ for a prebuilt version of the documentation.
You can also build it yourself from the docs folder.
Where are the tests?
--------------------
The tests are in the attic/testsuite package. To run the test suite use the
following command::
$ fakeroot -u python -m attic.testsuite.run