Add action AsymmentricKeysController#show

app/controllers/asymmetric_keys_controller.rb

@@ -1,9 +1,22 @@
 # frozen_string_literal: true
 
 class AsymmetricKeysController < ApplicationController
+  before_action :set_asymmetric_key, except: :index
+
   # GET /public_keys
   def index
     authorize AsymmetricKey
     @asymmetric_keys = policy_scope(AsymmetricKey).page(params[:page])
   end
+
+  # GET /public_keys/:id
+  def show
+    authorize @asymmetric_key
+  end
+
+private
+
+  def set_asymmetric_key
+    @asymmetric_key = AsymmetricKey.find params[:id]
+  end
 end

app/helpers/application_helper.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-module ApplicationHelper
+module ApplicationHelper # rubocop:disable Metrics/ModuleLength
   def federal_subjects_controller?
     controller_path == 'federal_subjects'
   end
@@ -13,6 +13,34 @@ module ApplicationHelper
     [*negative_timezones_collection, *positive_timezones_collection].freeze
   end
 
+  def display_sha1(str)
+    str = String(str).upcase
+    raise 'Invalid format for SHA-1' unless str.match?(/\A[A-F0-9]{40}\z/)
+
+    tag.small do
+      concat display_fingerprint str[0...20]
+      concat tag.br
+      concat display_fingerprint str[20..-1]
+    end
+  end
+
+  def display_sha256(str)
+    str = String(str).upcase
+    raise 'Invalid format for SHA-256' unless str.match?(/\A[A-F0-9]{64}\z/)
+
+    tag.small do
+      concat display_fingerprint str[0...32]
+      concat tag.br
+      concat display_fingerprint str[32..-1]
+    end
+  end
+
+  def display_fingerprint(str)
+    tag.samp do
+      String(str).strip.upcase.each_char.each_slice(2).map(&:join).join(':')
+    end
+  end
+
   def positive_timezones_collection
     0.upto(11).flat_map do |n|
       s = n.to_s.rjust(2, '0')

app/models/asymmetric_key.rb

@@ -44,6 +44,10 @@ class AsymmetricKey < ApplicationRecord
   # Methods #
   ###########
 
+  def self.policy_class
+    AsymmetricKeyPolicy
+  end
+
   def algo_class
     raise NotImplementedError, "#{self.class}#algo_class"
   end

app/policies/asymmetric_key_policy.rb

@@ -5,6 +5,10 @@ class AsymmetricKeyPolicy < ApplicationPolicy
     true
   end
 
+  def show?
+    true
+  end
+
   class Scope < Scope
     def resolve
       scope.all

app/views/asymmetric_keys/_table.html.erb

@@ -10,6 +10,7 @@
       <th scope="col">
         <%= AsymmetricKey.human_attribute_name :algo_variant %>
       </th>
+      <th scope="col"></th>
     </tr>
   </thead>
 
@@ -19,6 +20,11 @@
         <td scope="row"><%= asymmetric_key.id %></td>
         <td><%= asymmetric_key.algo_class %></td>
         <td><%= asymmetric_key.algo_variant %></td>
+        <td>
+          <% if policy(asymmetric_key).show? %>
+            <%= open_action public_key_path(asymmetric_key) %>
+          <% end %>
+        </td>
       </tr>
     <% end %>
   </tbody>

app/views/asymmetric_keys/show.html.erb

@@ -0,0 +1,35 @@
+<div class="container">
+  <%= nav_breadcrumb(
+      [AsymmetricKey.model_name.human(count: 0), public_keys_path],
+      AsymmetricKey.model_name.human(count: 1),
+    ) %>
+
+  <div class="row">
+    <div class="col-md-6">
+      <dl>
+        <dt><%= AsymmetricKey.human_attribute_name :id %></dt>
+        <dd><%= @asymmetric_key.id %></dd>
+
+        <dt><%= AsymmetricKey.human_attribute_name :algo_class %></dt>
+        <dd><%= @asymmetric_key.algo_class %></dd>
+
+        <dt><%= AsymmetricKey.human_attribute_name :algo_variant %></dt>
+        <dd><%= @asymmetric_key.algo_variant %></dd>
+
+        <dt><%= AsymmetricKey.human_attribute_name :sha1 %></dt>
+        <dd><%= display_sha1 @asymmetric_key.sha1 %></dd>
+
+        <dt><%= AsymmetricKey.human_attribute_name :sha256 %></dt>
+        <dd><%= display_sha256 @asymmetric_key.sha256 %></dd>
+      </dl>
+    </div>
+
+    <div class="col-md-6">
+      <%= render partial: 'private_keys/alert',
+                 locals: {
+                   asymmetric_key: @asymmetric_key,
+                 }
+        %>
+    </div>
+  </div>
+</div>

config/locales/activerecord/en.yml

@@ -57,6 +57,7 @@ en:
         id: ID
         algo_class: Algorithm class
         algo_variant: Variant
+        sha1: SHA-1 fingerprint
         sha256: SHA-256 fingerprint
       contact:
         id: ID

config/locales/activerecord/ru.yml

@@ -57,6 +57,7 @@ ru:
         id: ID
         algo_class: Класс алгоритма
         algo_variant: Вариант
+        sha1: Отпечаток SHA-1
         sha256: Отпечаток SHA-256
       contact:
         id: ID

config/routes.rb

@@ -14,9 +14,8 @@ Rails.application.routes.draw do
   resources :federal_subjects, param: :number, only: %i[index show]
 
   resources :public_keys,
-            as: :asymmetric_key,
             controller: 'asymmetric_keys',
-            only: :index
+            only: %i[index show]
 
   resources :private_keys, only: :show
 

spec/requests/asymmetric_keys/show_spec.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'GET /public_keys/:id' do
+  let(:current_account) { nil }
+
+  let(:asymmetric_key) { create %i[rsa_key ecurve_key].sample }
+
+  def make_request
+    get "/public_keys/#{asymmetric_key.id}"
+  end
+
+  before do
+    sign_in current_account.user if current_account&.user
+    make_request
+  end
+
+  for_account_types nil, :usual, :superuser do
+    specify do
+      expect(response).to have_http_status :ok
+    end
+  end
+
+  context 'for RSA key' do
+    let(:asymmetric_key) { create :rsa_key }
+
+    specify do
+      expect(response).to have_http_status :ok
+    end
+  end
+
+  context 'for elliptic-curve key' do
+    let(:asymmetric_key) { create :ecurve_key }
+
+    specify do
+      expect(response).to have_http_status :ok
+    end
+  end
+end