Only allow Git Access on the allowed protocol

4 files changed, 37 insertions, 5 deletions

diff --git a/lib/api/internal.rb b/lib/api/internal.rb
index b32503e8516..d5dfba5e0cc 100644
--- a/lib/api/internal.rb
+++ b/lib/api/internal.rb
@@ -13,6 +13,7 @@ module API
       #   action - git action (git-upload-pack or git-receive-pack)
       #   ref - branch name
       #   forced_push - forced_push
+      #   protocol - Git access protocol being used, e.g. HTTP or SSH
       #
 
       helpers do
@@ -46,11 +47,13 @@ module API
             User.find_by(id: params[:user_id])
           end
 
+        protocol = params[:protocol]
+
         access =
           if wiki?
-            Gitlab::GitAccessWiki.new(actor, project)
+            Gitlab::GitAccessWiki.new(actor, project, protocol)
           else
-            Gitlab::GitAccess.new(actor, project)
+            Gitlab::GitAccess.new(actor, project, protocol)
           end
 
         access_status = access.check(params[:action], params[:changes])
diff --git a/lib/gitlab/git/hook.rb b/lib/gitlab/git/hook.rb
index 420c6883c45..0b61c8bf332 100644
--- a/lib/gitlab/git/hook.rb
+++ b/lib/gitlab/git/hook.rb
@@ -34,7 +34,8 @@ module Gitlab
 
         vars = {
           'GL_ID' => gl_id,
-          'PWD' => repo_path
+          'PWD' => repo_path,
+          'PROTOCOL' => 'web'
         }
 
         options = {
diff --git a/lib/gitlab/git_access.rb b/lib/gitlab/git_access.rb
index d2a0e316cbe..7aec650d1a1 100644
--- a/lib/gitlab/git_access.rb
+++ b/lib/gitlab/git_access.rb
@@ -3,11 +3,12 @@ module Gitlab
     DOWNLOAD_COMMANDS = %w{ git-upload-pack git-upload-archive }
     PUSH_COMMANDS = %w{ git-receive-pack }
 
-    attr_reader :actor, :project
+    attr_reader :actor, :project, :protocol
 
-    def initialize(actor, project)
+    def initialize(actor, project, protocol = nil)
       @actor    = actor
       @project  = project
+      @protocol = protocol
     end
 
     def user
@@ -49,6 +50,8 @@ module Gitlab
     end
 
     def check(cmd, changes = nil)
+      return build_status_object(false, "Git access over #{protocol.upcase} is not allowed") unless protocol_allowed?
+
       unless actor
         return build_status_object(false, "No user or key was provided.")
       end
@@ -72,6 +75,8 @@ module Gitlab
     end
 
     def download_access_check
+      return build_status_object(false, "Git access over #{protocol.upcase} is not allowed") unless protocol_allowed?
+
       if user
         user_download_access_check
       elsif deploy_key
@@ -82,6 +87,8 @@ module Gitlab
     end
 
     def push_access_check(changes)
+      return build_status_object(false, "Git access over #{protocol.upcase} is not allowed") unless protocol_allowed?
+
       if user
         user_push_access_check(changes)
       elsif deploy_key
@@ -92,6 +99,8 @@ module Gitlab
     end
 
     def user_download_access_check
+      return build_status_object(false, "Git access over #{protocol.upcase} is not allowed") unless protocol_allowed?
+
       unless user.can?(:download_code, project)
         return build_status_object(false, "You are not allowed to download code from this project.")
       end
@@ -100,6 +109,8 @@ module Gitlab
     end
 
     def user_push_access_check(changes)
+      return build_status_object(false, "Git access over #{protocol.upcase} is not allowed") unless protocol_allowed?
+
       if changes.blank?
         return build_status_object(true)
       end
@@ -188,6 +199,10 @@ module Gitlab
       Gitlab::UserAccess.allowed?(user)
     end
 
+    def protocol_allowed?
+      protocol ? Gitlab::ProtocolAccess.allowed?(protocol) : true
+    end
+
     def branch_name(ref)
       ref = ref.to_s
       if Gitlab::Git.branch_ref?(ref)
diff --git a/lib/gitlab/protocol_access.rb b/lib/gitlab/protocol_access.rb
new file mode 100644
index 00000000000..0498a72d4cf
--- /dev/null
+++ b/lib/gitlab/protocol_access.rb
@@ -0,0 +1,13 @@
+module Gitlab
+  module ProtocolAccess
+    def self.allowed?(protocol)
+      if protocol.to_s == 'web'
+        true
+      elsif !current_application_settings.enabled_git_access_protocols.present?
+        true
+      else
+        protocol.to_s == current_application_settings.enabled_git_access_protocols
+      end
+    end
+  end
+end