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module Gitlab
module Gpg
class Commit
attr_reader :commit
def initialize(commit)
@commit = commit
@signature_text, @signed_text = commit.raw.signature(commit.project.repository)
end
def has_signature?
!!(@signature_text && @signed_text)
end
def signature
return unless has_signature?
cached_signature = GpgSignature.find_by(commit_sha: commit.sha)
return cached_signature if cached_signature.present?
using_keychain do |gpg_key|
create_cached_signature!(gpg_key)
end
end
def update_signature!(cached_signature)
using_keychain do |gpg_key|
cached_signature.update_attributes!(attributes(gpg_key))
end
end
private
def using_keychain
Gitlab::Gpg.using_tmp_keychain do
# first we need to get the keyid from the signature to query the gpg
# key belonging to the keyid.
# This way we can add the key to the temporary keychain and extract
# the proper signature.
gpg_key = GpgKey.find_by(primary_keyid: verified_signature.fingerprint)
if gpg_key
Gitlab::Gpg::CurrentKeyChain.add(gpg_key.key)
@verified_signature = nil
end
yield gpg_key
end
end
def verified_signature
@verified_signature ||= GPGME::Crypto.new.verify(@signature_text, signed_text: @signed_text) do |verified_signature|
break verified_signature
end
end
def create_cached_signature!(gpg_key)
GpgSignature.create!(attributes(gpg_key))
end
def attributes(gpg_key)
user_infos = user_infos(gpg_key)
{
commit_sha: commit.sha,
project: commit.project,
gpg_key: gpg_key,
gpg_key_primary_keyid: gpg_key&.primary_keyid || verified_signature.fingerprint,
gpg_key_user_name: user_infos[:name],
gpg_key_user_email: user_infos[:email],
valid_signature: gpg_signature_valid_signature_value(gpg_key)
}
end
def gpg_signature_valid_signature_value(gpg_key)
!!(gpg_key && gpg_key.verified? && verified_signature.valid?)
end
def user_infos(gpg_key)
gpg_key&.verified_user_infos&.first || gpg_key&.user_infos&.first || {}
end
end
end
end
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