diff --git a/.license_encryption_key.pub b/.license_encryption_key.pub
new file mode 100644
index 0000000000..68f241b974
--- /dev/null
+++ b/.license_encryption_key.pub
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0Hxv3MkkZbMrKtIs6np9
+ccP4OwGBkNhIvhPjcQP48hbbascv5RqsOquQGrYSD2ZrE/kbkRdkIcoHEeTZLif+
+bDKFZFI7o5x0H92o9/GSvxHJhQ8mkmvwxD7lssGShwZEm8WG+U7BZqUV/gGmCDqe
+9W8H8Fq2B0ck8IXjbQ4Zz+JlyV/NHZTZcs69plFiLKh4N6GYVftOVwSomh0bbypP
+OB9WnLC7RC9a2LRrhtf8sqa2rRFmtyMMfgFFzLMzS+w+1K4+QLnWP1gKQVzaFnzk
+pnwKPrqbGFYbRztIVEWbs8jPYlLkGb8ME4C84YVtQgbQcbyisU/VW3wUGkhT+J0k
+xwIDAQAB
+-----END PUBLIC KEY-----
diff --git a/Gemfile b/Gemfile
index 27abaf3f5d..d0a434c8bb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -203,6 +203,8 @@ gem 'request_store'
 gem "virtus"
 gem 'addressable'
 
+gem "gitlab-license"
+
 group :development do
   gem 'brakeman', require: false
   gem "annotate", "~> 2.6.0.beta2"
diff --git a/Gemfile.lock b/Gemfile.lock
index 79797f9803..3f3837e48d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -209,6 +209,7 @@ GEM
       diff-lcs (~> 1.1)
       mime-types (~> 1.15)
       posix-spawn (~> 0.3)
+    gitlab-license (0.0.1)
     gitlab-linguist (3.0.1)
       charlock_holmes (~> 0.6.6)
       escape_utils (~> 0.2.4)
@@ -706,6 +707,7 @@ DEPENDENCIES
   github-markup
   gitlab-flowdock-git-hook (~> 0.4.2)
   gitlab-grack (~> 2.0.2)
+  gitlab-license
   gitlab-linguist (~> 3.0.1)
   gitlab_emoji (~> 0.1)
   gitlab_git (~> 7.1.10)
diff --git a/app/assets/javascripts/application.js.coffee b/app/assets/javascripts/application.js.coffee
index bb9da14701..0f1b142d0d 100644
--- a/app/assets/javascripts/application.js.coffee
+++ b/app/assets/javascripts/application.js.coffee
@@ -114,6 +114,8 @@ if location.hash
   setTimeout shiftWindow, 1
 window.addEventListener "hashchange", shiftWindow
 
+$.timeago.settings.allowFuture = true
+
 $ ->
   # Click a .js-select-on-focus field, select the contents
   $(".js-select-on-focus").on "focusin", -> $(this).select()
diff --git a/app/controllers/admin/licenses_controller.rb b/app/controllers/admin/licenses_controller.rb
new file mode 100644
index 0000000000..5b94869ac0
--- /dev/null
+++ b/app/controllers/admin/licenses_controller.rb
@@ -0,0 +1,54 @@
+class Admin::LicensesController < Admin::ApplicationController
+  before_action :license, only: [:show, :download, :destroy]
+  before_action :require_license, only: [:show, :download, :destroy]
+
+  respond_to :html
+
+  def show
+    @previous_licenses = License.all.to_a[0..-2].reverse
+  end
+
+  def download
+    send_data @license.data, filename: @license.data_filename, disposition: 'attachment'
+  end
+
+  def new
+    @license = License.new
+  end
+
+  def create
+    @license = License.new
+    @license.data_file = license_params[:data_file]
+
+    respond_with(@license, location: admin_license_path) do
+      if @license.save
+        flash[:notice] = "The license was successfully uploaded."
+      end
+    end
+  end
+
+  def destroy
+    license.destroy
+
+    redirect_to admin_license_path, notice: "The license was removed."
+  end
+
+  private
+
+  def license
+    @license ||= begin
+      License.reset_current
+      License.current
+    end
+  end
+
+  def require_license
+    return if license
+
+    redirect_to new_admin_license_path
+  end
+
+  def license_params
+    params.require(:license).permit(:data_file)
+  end
+end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 6e86400a4f..bbf18f2267 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -213,9 +213,15 @@ module ApplicationHelper
 
   def time_ago_with_tooltip(date, placement = 'top', html_class = 'time_ago')
     capture_haml do
-      haml_tag :time, date.to_s,
-        class: html_class, datetime: date.getutc.iso8601, title: date.stamp('Aug 21, 2011 9:23pm'),
-        data: { toggle: 'tooltip', placement: placement }
+      if date.is_a?(Date)
+        haml_tag :time, date.to_s,
+          class: html_class, datetime: date.iso8601, title: date.stamp('Aug 21, 2011'),
+          data: { toggle: 'tooltip', placement: placement }
+      else
+        haml_tag :time, date.to_s,
+          class: html_class, datetime: date.getutc.iso8601, title: date.stamp('Aug 21, 2011 9:23pm'),
+          data: { toggle: 'tooltip', placement: placement }
+      end
 
       haml_tag :script, "$('." + html_class + "').timeago().tooltip()"
     end.html_safe
diff --git a/app/helpers/license_helper.rb b/app/helpers/license_helper.rb
new file mode 100644
index 0000000000..0a5b88885d
--- /dev/null
+++ b/app/helpers/license_helper.rb
@@ -0,0 +1,55 @@
+module LicenseHelper
+  # better text
+  def license_message(signed_in: signed_in?, is_admin: (current_user && current_user.is_admin?))
+
+    message = []
+
+    license = License.current
+    if license
+      return unless signed_in
+
+      return unless (license.notify_admins? && is_admin) || license.notify_users?
+
+      message << "The GitLab Enterprise Edition license"
+      message << (license.expired? ? "expired" : "will expire")
+      message << "on #{license.expires_at}."
+
+      if license.expired? && license.will_block_changes?
+        message << "Pushing code and creation of issues and merge requests"
+
+        if license.block_changes?
+          message << "has been disabled."
+        else
+          message << "will be disabled on #{license.block_changes_at}."
+        end
+      end
+
+      if is_admin
+        message << "Upload a new license in the admin area"
+      else
+        message << "Ask an admin to upload a new license"
+      end
+
+      if license.block_changes?
+        message << "to restore service."
+      else
+        message << "to ensure uninterrupted service."
+      end
+    else
+      message << "No GitLab Enterprise Edition license has been provided yet."
+      message << "Pushing code and creation of issues and merge requests has been disabled."
+
+      if signed_in && is_admin
+        message << "Upload a license in the admin area"
+      else
+        message << "Ask an admin to upload a license"
+      end
+
+      message << "to restore service."
+    end
+
+    message.join(" ")
+  end
+
+  extend self
+end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 85a15596f8..155e199345 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -5,18 +5,28 @@ class Ability
       return [] unless user.kind_of?(User)
       return [] if user.blocked?
 
-      case subject.class.name
-      when "Project" then project_abilities(user, subject)
-      when "Issue" then issue_abilities(user, subject)
-      when "Note" then note_abilities(user, subject)
-      when "ProjectSnippet" then project_snippet_abilities(user, subject)
-      when "PersonalSnippet" then personal_snippet_abilities(user, subject)
-      when "MergeRequest" then merge_request_abilities(user, subject)
-      when "Group" then group_abilities(user, subject)
-      when "Namespace" then namespace_abilities(user, subject)
-      when "GroupMember" then group_member_abilities(user, subject)
-      else []
-      end.concat(global_abilities(user))
+      abilities = 
+        case subject.class.name
+        when "Project" then project_abilities(user, subject)
+        when "Issue" then issue_abilities(user, subject)
+        when "Note" then note_abilities(user, subject)
+        when "ProjectSnippet" then project_snippet_abilities(user, subject)
+        when "PersonalSnippet" then personal_snippet_abilities(user, subject)
+        when "MergeRequest" then merge_request_abilities(user, subject)
+        when "Group" then group_abilities(user, subject)
+        when "Namespace" then namespace_abilities(user, subject)
+        when "GroupMember" then group_member_abilities(user, subject)
+        else []
+        end.concat(global_abilities(user))
+
+      if License.block_changes?
+        abilities.delete(:push_code)
+        abilities.delete(:push_code_to_protected_branches)
+        abilities.delete(:write_issue)
+        abilities.delete(:write_merge_request)
+      end
+
+      abilities
     end
 
     # List of possible abilities
@@ -68,7 +78,7 @@ class Ability
     def project_abilities(user, project)
       rules = []
       key = "/user/#{user.id}/project/#{project.id}"
-      RequestStore.store[key] ||= begin
+      rules = RequestStore.store[key] ||= begin
         team = project.team
 
         # Rules based on role in project
diff --git a/app/models/license.rb b/app/models/license.rb
new file mode 100644
index 0000000000..87d132e8d6
--- /dev/null
+++ b/app/models/license.rb
@@ -0,0 +1,93 @@
+class License < ActiveRecord::Base
+  validates :data, presence: true
+  validate :valid_license
+
+  before_validation :reset_license, if: :data_changed?
+
+  after_create :reset_current
+  after_destroy :reset_current
+
+  class << self
+    def current
+      return @current if @current
+
+      license = self.last
+      return unless license && license.valid?
+
+      @current = license
+    end
+
+    def reset_current
+      @current = nil
+    end
+
+    def block_changes?
+      !current || current.block_changes?
+    end
+  end
+
+  def data_filename
+    clean_company_name = self.licensee.values.first.gsub(/[^A-Za-z0-9]/, "")
+    "#{clean_company_name}.gitlab-license"
+  end
+
+  def data_file
+    return nil unless self.data
+
+    Tempfile.new(self.data_filename) { |f| f.write(self.data) }
+  end
+
+  def data_file=(file)
+    self.data = file.read
+  end
+
+  def license
+    return nil unless self.data
+
+    @license ||= Gitlab::License.import(self.data)
+  end
+
+  def method_missing(method_name, *arguments, &block)
+    if License.column_names.include?(method_name.to_s)
+      super
+    elsif license && license.respond_to?(method_name)
+      license.send(method_name, *arguments, &block)
+    else
+      super
+    end
+  end
+
+  def respond_to_missing?(method_name, include_private = false)
+    if License.column_names.include?(method_name.to_s)
+      super
+    elsif license && license.respond_to?(method_name)
+      true
+    else
+      super
+    end
+    (license && license.respond_to?(method_name)) || super
+  end
+
+  def active_user_restriction_exceeded?
+    return false unless self.restricted?(:active_user_count)
+
+    User.active.count > self.restrictions[:active_user_count]
+  end
+
+  private
+
+  def reset_current
+    self.class.reset_current
+  end
+
+  def reset_license
+    @license = nil
+  end
+
+  def valid_license
+    return if self.license && self.license.valid?
+
+    # TODO: Clearer message
+    self.errors.add(:license, "is invalid.")
+  end
+end
diff --git a/app/views/admin/licenses/new.html.haml b/app/views/admin/licenses/new.html.haml
new file mode 100644
index 0000000000..48c3943310
--- /dev/null
+++ b/app/views/admin/licenses/new.html.haml
@@ -0,0 +1,20 @@
+%h3.page-title Upload License
+
+%p.light
+  To #{License.current ? "continue" : "start"} using GitLab Enterprise Edition, upload the <code>.gitlab-license</code> file you have received from GitLab B.V.
+
+%hr
+= form_for @license, url: admin_license_path, html: { multipart: true, class: 'form-horizontal fieldset-form' } do |f|
+  - if @license.errors.any?
+    #error_explanation
+      .alert.alert-danger
+        - @license.errors.full_messages.each do |msg|
+          %p= msg
+
+  .form-group
+    = f.label :data_file, "License", class: 'control-label col-sm-2'
+    .col-sm-10
+      = f.file_field :data_file, accept: ".gitlab-license,.gitlab_license"
+
+  .form-actions
+    = f.submit 'Upload', class: 'btn btn-primary'
diff --git a/app/views/admin/licenses/show.html.haml b/app/views/admin/licenses/show.html.haml
new file mode 100644
index 0000000000..f8b8b98ec7
--- /dev/null
+++ b/app/views/admin/licenses/show.html.haml
@@ -0,0 +1,116 @@
+%h3.page-title 
+  Your License
+  = link_to 'Upload License', new_admin_license_path, class: "btn btn-new pull-right"
+
+%hr
+
+.row
+  .col-md-6
+    .panel.panel-default
+      .panel-heading
+        Licensed to
+      %ul.well-list
+        - @license.licensee.each do |label, value|
+          %li
+            %span.light #{label}:
+            %strong= value
+
+    .panel.panel-default
+      .panel-heading
+        Details
+      %ul.well-list
+        %li
+          %span.light Issued:
+          %strong= time_ago_with_tooltip @license.issued_at
+        %li
+          %span.light Uploaded:
+          %strong= time_ago_with_tooltip @license.created_at
+        %li
+          %span.light Expires:
+          %strong
+            - if @license.will_expire?
+              = time_ago_with_tooltip @license.expires_at
+              - if @license.expired?
+                %span.label.label-danger.pull-right
+                  %strong Expired
+            - else
+              Never
+
+    .panel.panel-default
+      .panel-heading
+        Restrictions
+      %ul.well-list
+        %li
+          %span.light Active users:
+          %strong
+            - if @license.restricted?(:active_user_count)
+              - restricted_user_count = @license.restrictions[:active_user_count]
+              - active_user_count = User.active.count
+              #{restricted_user_count} users
+
+              - if active_user_count > restricted_user_count
+                %span.label.label-danger.pull-right
+                  %strong Exceeded by #{active_user_count - restricted_user_count} users
+              - elsif restricted_user_count > active_user_count
+                %span.label.label-success.pull-right
+                  %strong #{restricted_user_count - active_user_count} more allowed
+              - else
+                %span.label.label-info.pull-right
+                  %strong Right at the limit
+
+            - else
+              Unlimited
+
+  .col-md-6
+    .panel.panel-info
+      .panel-heading
+        Download license
+      .panel-body
+        %p Your license will be included in your GitLab backup and will survive upgrades, so in normal usage you should never need to re-upload your <code>.gitlab-license</code>.
+        %p Still, we recommend keeping it save somewhere, because if you ever need it and have lost it, you will need to request GitLab B.V. to send it to you again.
+        %br
+        = link_to 'Download license', download_admin_license_path, class: "btn btn-info"
+
+
+    .panel.panel-danger
+      .panel-heading
+        Remove license
+      .panel-body
+        %p If you remove this license, GitLab will fall back on the previous license, if any.
+        %p If there is no previous license or if the previous license has expired, some GitLab functionality will be blocked until a new, valid license is uploaded.
+        %br
+        = link_to 'Remove license', admin_license_path, data: { confirm: "LICENSE WILL BE REMOVED! Are you sure?" }, method: :delete, class: "btn btn-remove"
+
+- if @previous_licenses.any?
+  %h4 Previous Licenses
+
+  .panel.panel-default
+    %table.table
+      %thead.panel-heading
+        %tr
+          - @license.licensee.keys.each do |label|
+            %th= label
+          %th Issued at
+          %th Uploaded at
+          %th Expired at
+          %th Active users
+      %tbody
+        - @previous_licenses.each do |license|
+          %tr
+            - @license.licensee.keys.each do |label|
+              %td= license.licensee[label]
+            %td
+              %span
+                = license.issued_at
+            %td
+              %span
+                = license.created_at
+            %td
+              %span
+                = license.expires_at || "Never"
+            %td
+              %span
+                - if license.restricted?(:active_user_count)
+                  #{license.restrictions[:active_user_count]} users
+                - else
+                  Unlimited
diff --git a/app/views/layouts/_broadcast.html.haml b/app/views/layouts/_broadcast.html.haml
index e7d477c225..267eaa411c 100644
--- a/app/views/layouts/_broadcast.html.haml
+++ b/app/views/layouts/_broadcast.html.haml
@@ -2,3 +2,8 @@
   .broadcast-message{ style: broadcast_styling(broadcast_message) }
     %i.fa.fa-bullhorn
     = broadcast_message.message
+
+- if (message = license_message) && message.present?
+  .broadcast-message
+    %i.fa.fa-bullhorn
+    = message
diff --git a/app/views/layouts/nav/_admin.html.haml b/app/views/layouts/nav/_admin.html.haml
index fda6880163..2aeccfb08b 100644
--- a/app/views/layouts/nav/_admin.html.haml
+++ b/app/views/layouts/nav/_admin.html.haml
@@ -72,3 +72,9 @@
       = icon('cogs fw')
       %span
         Settings
+
+  = nav_link(controller: :licenses) do
+    = link_to admin_license_path, title: 'License', data: {placement: 'right'} do
+      = icon('check fw')
+      %span
+        License
diff --git a/config/initializers/license.rb b/config/initializers/license.rb
new file mode 100644
index 0000000000..eda165b62e
--- /dev/null
+++ b/config/initializers/license.rb
@@ -0,0 +1,16 @@
+public_key_file = File.read(Rails.root.join(".license_encryption_key.pub"))
+public_key = OpenSSL::PKey::RSA.new(public_key_file)
+Gitlab::License.encryption_key = public_key
+
+# TODO: Validate encryptionkey
+
+# Needed to run migration
+if ActiveRecord::Base.connected? && ActiveRecord::Base.connection.table_exists?('licenses')
+  message = LicenseHelper.license_message(signed_in: true, is_admin: true)
+  if message.present?
+    # TODO: Change
+    warn "WARNING: #{message}"
+  end
+
+  # TODO: Warn about too many users
+end
diff --git a/config/routes.rb b/config/routes.rb
index 81d8cac102..fc83a14c88 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -211,6 +211,10 @@ Gitlab::Application.routes.draw do
       resources :services
     end
 
+    resource :license, only: [:show, :new, :create, :destroy] do
+      get :download, on: :member
+    end
+
     root to: 'dashboard#index'
   end
 
diff --git a/db/migrate/20150501095306_create_licenses.rb b/db/migrate/20150501095306_create_licenses.rb
new file mode 100644
index 0000000000..730c544c82
--- /dev/null
+++ b/db/migrate/20150501095306_create_licenses.rb
@@ -0,0 +1,9 @@
+class CreateLicenses < ActiveRecord::Migration
+  def change
+    create_table :licenses do |t|
+      t.text :data, null: false
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 6728c211ab..3b57047ef6 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150425173433) do
+ActiveRecord::Schema.define(version: 20150501095306) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -210,6 +210,12 @@ ActiveRecord::Schema.define(version: 20150425173433) do
     t.string   "provider"
   end
 
+  create_table "licenses", force: true do |t|
+    t.text     "data",       null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
   create_table "members", force: true do |t|
     t.integer  "access_level",       null: false
     t.integer  "source_id",          null: false
@@ -302,7 +308,7 @@ ActiveRecord::Schema.define(version: 20150425173433) do
   end
 
   add_index "namespaces", ["created_at", "id"], name: "index_namespaces_on_created_at_and_id", using: :btree
-  add_index "namespaces", ["name"], name: "index_namespaces_on_name", unique: true, using: :btree
+  add_index "namespaces", ["name"], name: "index_namespaces_on_name", using: :btree
   add_index "namespaces", ["owner_id"], name: "index_namespaces_on_owner_id", using: :btree
   add_index "namespaces", ["path"], name: "index_namespaces_on_path", unique: true, using: :btree
   add_index "namespaces", ["type"], name: "index_namespaces_on_type", using: :btree
@@ -410,11 +416,11 @@ ActiveRecord::Schema.define(version: 20150425173433) do
     t.string   "avatar"
     t.string   "import_status"
     t.float    "repository_size",               default: 0.0
-    t.text     "merge_requests_template"
     t.integer  "star_count",                    default: 0,        null: false
-    t.boolean  "merge_requests_rebase_enabled", default: false
     t.string   "import_type"
     t.string   "import_source"
+    t.text     "merge_requests_template"
+    t.boolean  "merge_requests_rebase_enabled", default: false
     t.boolean  "merge_requests_rebase_default", default: true
   end
 
@@ -541,7 +547,6 @@ ActiveRecord::Schema.define(version: 20150425173433) do
     t.string   "unconfirmed_email"
     t.boolean  "hide_no_ssh_key",               default: false
     t.string   "website_url",                   default: "",    null: false
-    t.datetime "admin_email_unsubscribed_at"
     t.string   "github_access_token"
     t.string   "gitlab_access_token"
     t.string   "notification_email"
@@ -549,6 +554,7 @@ ActiveRecord::Schema.define(version: 20150425173433) do
     t.boolean  "password_automatically_set",    default: false
     t.string   "bitbucket_access_token"
     t.string   "bitbucket_access_token_secret"
+    t.datetime "admin_email_unsubscribed_at"
     t.string   "location"
     t.string   "public_email",                  default: "",    null: false
   end
diff --git a/lib/gitlab/git_access.rb b/lib/gitlab/git_access.rb
index a443f44f79..4832c73186 100644
--- a/lib/gitlab/git_access.rb
+++ b/lib/gitlab/git_access.rb
@@ -102,8 +102,9 @@ module Gitlab
     end
 
     def user_push_access_check(changes)
-      unless user && user_allowed?
-        return build_status_object(false, "You don't have access")
+      if ::License.block_changes?
+        message = ::LicenseHelper.license_message(signed_in: true, is_admin: (user && user.is_admin?))
+        return build_status_object(false, message)
       end
 
       if changes.blank?