git-remote-gcrypt/README

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# git-remote-gcrypt
# Copyright 2013 by Ulrik Sverdrup
# License: GPLv2 or any later version, see http://www.gnu.org/licenses/
# Use GnuPG to use encrypted git remotes
WARNING: This is a proof of concept
WARNING: Repository format WILL change, incompatibly
INTRODUCTION
Install as `git-remote-gcrypt` in $PATH
Supports local, ssh:// and sftp:// remotes at the moment,
as well as the special gitception://<giturl> remote type::
git config --global gcrypt.recipients KEYID1
git remote add gcryptrepo gcrypt::ssh://hostname.com:MyNewRepo
( or maybe:
git remote add gcryptrepo gcrypt::gitception://git://host.com/repo.git
)
git push --all gcryptrepo
CONFIGURATION
* You must set up a small gpg keyring for the repository::
gpg --export KEYID1 > <path-to-keyring>
git config gcrypt.keyring <path-to-keyring>
New repositories will be created to allow access for the keys in
`gcrypt.keyring`. The keyring is used to verify the authenticity of the
repository when it is read or written to.
* Set `git config gcrypt.signmanifest 1` to also sign the manifest (the
list of branches and packfiles) when pushing.
* Set `git config gcrypt.requiresign 1` to fail and stop if no valid
signature is found on the manifest.
* NOTE: We use the users gnupg configuration for cipher-algo and so on!
Configure your gnupg to use a strong crypto -- see `man gpg`.
REPOSITORY FORMAT
* masterkey is first signed, then encrypted using `gpg -e` with hidden
recipients
* manifest contains the branches and the list of packfiles
$ cd MyCryptedRemote
$ ls
-rw-- 11K 00ef27cc2c5b76365e1a46479ed7429e16572c543cdff0a8bf745c7c
-rw-- 41K b934d8d6c0f48e71b9d7a4d5ea56f024a9bed4f6f2c6f8e688695bee
-rw-- 577 manifest
-rw-- 495 masterkey
$ gpg -d masterkey | gpg --passphrase-fd 0 -d manifest
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
b4a4a39365d19282810c19d0f3f24d04dd2d179f refs/tags/something
1d323ddadf4cf1d80fced447e637ab3766b168b7 refs/heads/master
pack :SHA224:00ef27cc2c5b76365e1a46479ed7429e16572c543cdff0a8bf745c7c
pack :SHA224:b934d8d6c0f48e71b9d7a4d5ea56f024a9bed4f6f2c6f8e688695bee
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXX
-----END PGP SIGNATURE-----