1 files changed, 74 insertions, 0 deletions
diff --git a/spec/lib/gitlab/middleware/multipart_spec.rb b/spec/lib/gitlab/middleware/multipart_spec.rb
new file mode 100644
index 00000000000..ab1ab22795c
--- /dev/null
+++ b/spec/lib/gitlab/middleware/multipart_spec.rb
@@ -0,0 +1,74 @@
+require 'spec_helper'
+
+require 'tempfile'
+
+describe Gitlab::Middleware::Multipart do
+  let(:app) { double(:app) }
+  let(:middleware) { described_class.new(app) }
+
+  it 'opens top-level files' do
+    Tempfile.open('top-level') do |tempfile|
+      env = post_env({ 'file' => tempfile.path }, { 'file.name' => 'filename' }, Gitlab::Workhorse.secret, 'gitlab-workhorse')
+
+      expect(app).to receive(:call) do |env|
+        file = Rack::Request.new(env).params['file']
+        expect(file).to be_a(File)
+        expect(file.path).to eq(tempfile.path)
+      end
+
+      middleware.call(env)
+    end
+  end
+
+  it 'rejects headers signed with the wrong secret' do
+    env = post_env({ 'file' => '/var/empty/nonesuch' }, {}, 'x' * 32, 'gitlab-workhorse')
+
+    expect { middleware.call(env) }.to raise_error(JWT::VerificationError)
+  end
+
+  it 'rejects headers signed with the wrong issuer' do
+    env = post_env({ 'file' => '/var/empty/nonesuch' }, {}, Gitlab::Workhorse.secret, 'acme-inc')
+
+    expect { middleware.call(env) }.to raise_error(JWT::InvalidIssuerError)
+  end
+
+  it 'opens files one level deep' do
+    Tempfile.open('one-level') do |tempfile|
+      in_params = { 'user' => { 'avatar' => { '.name' => 'filename' } } }
+      env = post_env({ 'user[avatar]' => tempfile.path }, in_params, Gitlab::Workhorse.secret, 'gitlab-workhorse')
+
+      expect(app).to receive(:call) do |env|
+        file = Rack::Request.new(env).params['user']['avatar']
+        expect(file).to be_a(File)
+        expect(file.path).to eq(tempfile.path)
+      end
+
+      middleware.call(env)
+    end
+  end
+
+  it 'opens files two levels deep' do
+    Tempfile.open('two-levels') do |tempfile|
+      in_params = { 'project' => { 'milestone' => { 'themesong' => { '.name' => 'filename' } } } }
+      env = post_env({ 'project[milestone][themesong]' => tempfile.path }, in_params, Gitlab::Workhorse.secret, 'gitlab-workhorse')
+
+      expect(app).to receive(:call) do |env|
+        file = Rack::Request.new(env).params['project']['milestone']['themesong']
+        expect(file).to be_a(File)
+        expect(file.path).to eq(tempfile.path)
+      end
+
+      middleware.call(env)
+    end
+  end
+
+  def post_env(rewritten_fields, params, secret, issuer)
+    token = JWT.encode({ 'iss' => issuer, 'rewritten_fields' => rewritten_fields }, secret, 'HS256')
+    Rack::MockRequest.env_for(
+      '/',
+      method: 'post',
+      params: params,
+      described_class::RACK_ENV_KEY => token
+    )
+  end
+end