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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?
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)
end
create_cached_signature!(gpg_key)
end
end
private
def verified_signature
GPGME::Crypto.new.verify(@signature_text, signed_text: @signed_text) do |verified_signature|
return verified_signature
end
end
def create_cached_signature!(gpg_key)
verified_signature_result = verified_signature
GpgSignature.create!(
commit_sha: commit.sha,
project: commit.project,
gpg_key: gpg_key,
gpg_key_primary_keyid: gpg_key&.primary_keyid || verified_signature_result.fingerprint,
valid_signature: !!(gpg_key && gpg_key.verified? && verified_signature_result.valid?)
)
end
end
end
end
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