require 'spec_helper'

describe Key, :mailer do
  describe "Associations" do
    it { is_expected.to belong_to(:user) }
  end

  describe "Validation" do
    it { is_expected.to validate_presence_of(:title) }
    it { is_expected.to validate_length_of(:title).is_at_most(255) }

    it { is_expected.to validate_presence_of(:key) }
    it { is_expected.to validate_length_of(:key).is_at_most(5000) }
    it { is_expected.to allow_value(attributes_for(:rsa_key_2048)[:key]).for(:key) }
    it { is_expected.to allow_value(attributes_for(:dsa_key_2048)[:key]).for(:key) }
    it { is_expected.to allow_value(attributes_for(:ecdsa_key_256)[:key]).for(:key) }
    it { is_expected.to allow_value(attributes_for(:ed25519_key_256)[:key]).for(:key) }
    it { is_expected.not_to allow_value('foo-bar').for(:key) }
  end

  describe "Methods" do
    let(:user) { create(:user) }
    it { is_expected.to respond_to :projects }
    it { is_expected.to respond_to :publishable_key }

    describe "#publishable_keys" do
      it 'replaces SSH key comment with simple identifier of username + hostname' do
        expect(build(:key, user: user).publishable_key).to include("#{user.name} (#{Gitlab.config.gitlab.host})")
      end
    end

    describe "#update_last_used_at" do
      it 'updates the last used timestamp' do
        key = build(:key)
        service = double(:service)

        expect(Keys::LastUsedService).to receive(:new)
          .with(key)
          .and_return(service)

        expect(service).to receive(:execute)

        key.update_last_used_at
      end
    end
  end

  context "validation of uniqueness (based on fingerprint uniqueness)" do
    let(:user) { create(:user) }

    it "accepts the key once" do
      expect(build(:key, user: user)).to be_valid
    end

    it "does not accept the exact same key twice" do
      first_key = create(:key, user: user)

      expect(build(:key, user: user, key: first_key.key)).not_to be_valid
    end

    it "does not accept a duplicate key with a different comment" do
      first_key = create(:key, user: user)
      duplicate = build(:key, user: user, key: first_key.key)
      duplicate.key << ' extra comment'

      expect(duplicate).not_to be_valid
    end
  end

  context "validate it is a fingerprintable key" do
    it "accepts the fingerprintable key" do
      expect(build(:key)).to be_valid
    end

    it 'rejects the unfingerprintable key (not a key)' do
      expect(build(:key, key: 'ssh-rsa an-invalid-key==')).not_to be_valid
    end

    where(:factory, :chars, :expected_sections) do
      [
        [:key,                 ["\n", "\r\n"], 3],
        [:key,                 [' ', ' '],     3],
        [:key_without_comment, [' ', ' '],     2]
      ]
    end

    with_them do
      let!(:key) { create(factory) }
      let!(:original_fingerprint) { key.fingerprint }

      it 'accepts a key with blank space characters after stripping them' do
        modified_key = key.key.insert(100, chars.first).insert(40, chars.last)
        _, content = modified_key.split

        key.update!(key: modified_key)

        expect(key).to be_valid
        expect(key.key.split.size).to eq(expected_sections)

        expect(content).not_to match(/\s/)
        expect(original_fingerprint).to eq(key.fingerprint)
      end
    end
  end

  context 'validate size' do
    where(:key_content, :result) do
      [
        [Spec::Support::Helpers::KeyGeneratorHelper.new(512).generate,  false],
        [Spec::Support::Helpers::KeyGeneratorHelper.new(8192).generate, false],
        [Spec::Support::Helpers::KeyGeneratorHelper.new(1024).generate, true]
      ]
    end

    with_them do
      it 'validates the size of the key' do
        key = build(:key, key: key_content)

        expect(key.valid?).to eq(result)
      end
    end
  end

  context 'validate it meets key restrictions' do
    where(:factory, :minimum, :result) do
      forbidden = ApplicationSetting::FORBIDDEN_KEY_VALUE

      [
        [:rsa_key_2048,    0, true],
        [:dsa_key_2048,    0, true],
        [:ecdsa_key_256,   0, true],
        [:ed25519_key_256, 0, true],

        [:rsa_key_2048, 1024, true],
        [:rsa_key_2048, 2048, true],
        [:rsa_key_2048, 4096, false],

        [:dsa_key_2048, 1024, true],
        [:dsa_key_2048, 2048, true],
        [:dsa_key_2048, 4096, false],

        [:ecdsa_key_256, 256, true],
        [:ecdsa_key_256, 384, false],

        [:ed25519_key_256, 256, true],
        [:ed25519_key_256, 384, false],

        [:rsa_key_2048,    forbidden, false],
        [:dsa_key_2048,    forbidden, false],
        [:ecdsa_key_256,   forbidden, false],
        [:ed25519_key_256, forbidden, false]
      ]
    end

    with_them do
      subject(:key) { build(factory) }

      before do
        stub_application_setting("#{key.public_key.type}_key_restriction" => minimum)
      end

      it { expect(key.valid?).to eq(result) }
    end
  end

  context 'callbacks' do
    it 'adds new key to authorized_file' do
      key = build(:personal_key, id: 7)
      expect(GitlabShellWorker).to receive(:perform_async).with(:add_key, key.shell_id, key.key)
      key.save!
    end

    it 'removes key from authorized_file' do
      key = create(:personal_key)
      expect(GitlabShellWorker).to receive(:perform_async).with(:remove_key, key.shell_id, key.key)
      key.destroy
    end
  end

  describe '#key=' do
    let(:valid_key) do
      "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAIEAiPWx6WM4lhHNedGfBpPJNPpZ7yKu+dnn1SJejgt4596k6YjzGGphH2TUxwKzxcKDKKezwkpfnxPkSMkuEspGRt/aZZ9wa++Oi7Qkr8prgHc4soW6NUlfDzpvZK2H5E7eQaSeP3SAwGmQKUFHCddNaP0L+hM7zhFNzjFvpaMgJw0= dummy@gitlab.com"
    end

    it 'strips white spaces' do
      expect(described_class.new(key: " #{valid_key} ").key).to eq(valid_key)
    end

    it 'invalidates the public_key attribute' do
      key = build(:key)

      original = key.public_key
      key.key = valid_key

      expect(original.key_text).not_to be_nil
      expect(key.public_key.key_text).to eq(valid_key)
    end
  end

  describe '#refresh_user_cache', :use_clean_rails_memory_store_caching do
    context 'when the key belongs to a user' do
      it 'refreshes the keys count cache for the user' do
        expect_any_instance_of(Users::KeysCountService)
          .to receive(:refresh_cache)
          .and_call_original

        key = create(:personal_key)

        expect(Users::KeysCountService.new(key.user).count).to eq(1)
      end
    end

    context 'when the key does not belong to a user' do
      it 'does nothing' do
        expect_any_instance_of(Users::KeysCountService)
          .not_to receive(:refresh_cache)

        create(:key)
      end
    end
  end
end