141 lines
4.1 KiB
Ruby
141 lines
4.1 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Gpg
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class Commit
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include Gitlab::Utils::StrongMemoize
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def initialize(commit)
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@commit = commit
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repo = commit.project.repository.raw_repository
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@signature_data = Gitlab::Git::Commit.extract_signature_lazily(repo, commit.sha || commit.id)
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end
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def signature_text
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strong_memoize(:signature_text) do
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@signature_data&.itself && @signature_data[0]
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end
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end
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def signed_text
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strong_memoize(:signed_text) do
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@signature_data&.itself && @signature_data[1]
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end
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end
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def has_signature?
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!!(signature_text && signed_text)
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end
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# rubocop: disable CodeReuse/ActiveRecord
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def signature
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return unless has_signature?
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return @signature if @signature
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cached_signature = GpgSignature.find_by(commit_sha: @commit.sha)
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return @signature = cached_signature if cached_signature.present?
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@signature = create_cached_signature!
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end
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# rubocop: enable CodeReuse/ActiveRecord
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def update_signature!(cached_signature)
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using_keychain do |gpg_key|
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cached_signature.update!(attributes(gpg_key))
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@signature = cached_signature
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end
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end
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private
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def using_keychain
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Gitlab::Gpg.using_tmp_keychain do
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# first we need to get the fingerprint from the signature to query the gpg
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# key belonging to the fingerprint.
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# This way we can add the key to the temporary keychain and extract
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# the proper signature.
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# NOTE: the invoked method is #fingerprint but versions of GnuPG
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# prior to 2.2.13 return 16 characters (the format used by keyid)
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# instead of 40.
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fingerprint = verified_signature&.fingerprint
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break unless fingerprint
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gpg_key = find_gpg_key(fingerprint)
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if gpg_key
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Gitlab::Gpg::CurrentKeyChain.add(gpg_key.key)
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clear_memoization(:verified_signature)
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end
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yield gpg_key
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end
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end
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def verified_signature
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strong_memoize(:verified_signature) { gpgme_signature }
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end
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def gpgme_signature
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GPGME::Crypto.new.verify(signature_text, signed_text: signed_text) do |verified_signature|
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# Return the first signature for now: https://gitlab.com/gitlab-org/gitlab-ce/issues/54932
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break verified_signature
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end
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rescue GPGME::Error
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nil
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end
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def create_cached_signature!
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using_keychain do |gpg_key|
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attributes = attributes(gpg_key)
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break GpgSignature.new(attributes) if Gitlab::Database.read_only?
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GpgSignature.safe_create!(attributes)
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end
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end
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def attributes(gpg_key)
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user_infos = user_infos(gpg_key)
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verification_status = verification_status(gpg_key)
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{
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commit_sha: @commit.sha,
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project: @commit.project,
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gpg_key: gpg_key,
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gpg_key_primary_keyid: gpg_key&.keyid || verified_signature&.fingerprint,
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gpg_key_user_name: user_infos[:name],
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gpg_key_user_email: user_infos[:email],
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verification_status: verification_status
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}
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end
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def verification_status(gpg_key)
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return :unknown_key unless gpg_key
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return :unverified_key unless gpg_key.verified?
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return :unverified unless verified_signature&.valid?
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if gpg_key.verified_and_belongs_to_email?(@commit.committer_email)
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:verified
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elsif gpg_key.user.all_emails.include?(@commit.committer_email)
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:same_user_different_email
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else
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:other_user
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end
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end
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def user_infos(gpg_key)
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gpg_key&.verified_user_infos&.first || gpg_key&.user_infos&.first || {}
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end
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def find_gpg_key(fingerprint)
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if fingerprint.length > 16
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GpgKey.find_by_fingerprint(fingerprint) || GpgKeySubkey.find_by_fingerprint(fingerprint)
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else
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GpgKey.find_by_primary_keyid(fingerprint) || GpgKeySubkey.find_by_keyid(fingerprint)
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end
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end
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end
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end
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end
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