[PATCH v2 2/3] package_manager: sign DEB package feeds

[Ferry Toth <fntoth@gmail.com>]

From: Ferry Toth <ftoth@exalondelft.nl>

Implement debian package repository signature.
For each Release file created in repository subdirectory, a signature
Release.gpg is created.

Signature is performed using gpg backend when the following variables
are set in local.conf:
PACKAGE_CLASSES += "sign_package_feed"
PACKAGE_FEED_GPG_NAME = "<Id of GPG key>"
PACKAGE_FEED_GPG_PASSPHRASE_FILE="<path to password file>"

Signed-off-by: Xavier Berger <xavier.berger@bio-logic.net>
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
---
 meta/lib/oe/package_manager/deb/__init__.py | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/meta/lib/oe/package_manager/deb/__init__.py b/meta/lib/oe/package_manager/deb/__init__.py
index 9f112ae25b..86ddb130ad 100644
--- a/meta/lib/oe/package_manager/deb/__init__.py
+++ b/meta/lib/oe/package_manager/deb/__init__.py
@@ -53,6 +53,7 @@ class DpkgIndexer(Indexer):
 
         index_cmds = []
         deb_dirs_found = False
+        index_sign_files = set()
         for arch in arch_list:
             arch_dir = os.path.join(self.deploy_dir, arch)
             if not os.path.isdir(arch_dir):
@@ -62,7 +63,10 @@ class DpkgIndexer(Indexer):
 
             cmd += "%s -fcn Packages > Packages.gz;" % gzip
 
-            with open(os.path.join(arch_dir, "Release"), "w+") as release:
+            release_file = os.path.join(arch_dir, "Release")
+            index_sign_files.add(release_file)
+
+            with open(release_file, "w+") as release:
                 release.write("Label: %s\n" % arch)
 
             cmd += "PSEUDO_UNLOAD=1 %s release . >> Release" % apt_ftparchive
@@ -76,8 +80,17 @@ class DpkgIndexer(Indexer):
             return
 
         oe.utils.multiprocess_launch(create_index, index_cmds, self.d)
-        if self.d.getVar('PACKAGE_FEED_SIGN') == '1':
-            raise NotImplementedError('Package feed signing not implementd for dpkg')
+        if self.d.getVar('PACKAGE_FEED_SIGN', True) == '1':
+            signer = get_signer(self.d, self.d.getVar('PACKAGE_FEED_GPG_BACKEND', True))
+        else:
+            signer = None
+        if signer:
+            for f in index_sign_files:
+                signer.detach_sign(f,
+                                   self.d.getVar('PACKAGE_FEED_GPG_NAME', True),
+                                   self.d.getVar('PACKAGE_FEED_GPG_PASSPHRASE_FILE', True),
+                                   output_suffix="gpg",
+                                   use_sha256=True)
 
 class PMPkgsList(PkgsList):
 
-- 
2.32.0