Rails:未定义的方法`%'表示true:TrueClass

时间:2011-06-22 06:23:32

标签: ruby-on-rails encryption

我遇到了rails的问题:我正在尝试为个人使用和学习rails进行密码管理的应用程序,我希望密码加密(现在我使用的是blowfish算法)。我已经安装了crypt gem并编写了一些代码,但是我收到了一个奇怪的错误。

这是我的代码:

app / controller / credentials_controller.rb(脚手架生成)

def create
  @credential = current_user.credentials.build(params[:credential])

  respond_to do |format|
    if @credential.save
      format.html { redirect_to(@credential, :notice => 'Credential was successfully created.') }
      format.xml  { render :xml => @credential, :status => :created, :location => @credential }
    else
      format.html { render :action => "new" }
      format.xml  { render :xml => @credential.errors, :status => :unprocessable_entity }
    end
  end
end

app / models / credential.rb(在db中我创建了一个salt:string列)

require 'crypt/blowfish'                           

 class Credential < ActiveRecord::Base  
    before_save :hash_password
    before_update :hash_password
    after_find :unhash_password

    private
    def hash_password
      self.salt = ActiveSupport::SecureRandom.base64(8)
      blowfish = Crypt::Blowfish.new(self.salt)
      self.pass = blowfish.encrypt_block(self.pass)
    end

    def unhash_password
    end
end

app / views / credential / _form.html.erb

<%= form_for(@credential) do |f| %>
 <% if @credential.errors.any? %>
 <div id="error_explanation">
   <h2><%= pluralize(@credential.errors.count, "error") %> prohibited this credential from being saved:</h2>

   <ul>
   <% @credential.errors.full_messages.each do |msg| %>
     <li><%= msg %></li>
   <% end %>
   </ul >
 </div> 
   <% end %>
 <div class="field">
   <%= f.label :servizio %><br />
   <%= f.text_field :servizio %>
 </div>
 <div class="field">
   <%= f.label :url %><br />
   <%= f.text_field :url %>
 </div>
 <div class="field">
   <%= f.label :email %><br />
   <%= f.text_field :email %>
 </div>
 <div class="field">
   <%= f.label :utente %><br />
   <%= f.text_field :utente %>
 </div>
 <div class="field">
   <%= f.label :pass %><br />
   <%= f.text_field :pass %>
 </div>
 <div class="field">
   <%= f.label :note %><br />
   <%= f.text_area :note %>
 </div>
 <div class="field">

<%= collection_select(:credential, :group_id, current_user.groups, :id, :nome,  prompt => 'Seleziona Gruppo') %>    
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

错误是:

`Action Controller: Exception caught
NoMethodError in CredentialsController#create 
 undefined method '%' for true:TrueClass
app/models/credential.rb:17:in 'hash_password'
app/controllers/credentials_controller.rb:47
app/controllers/credentials_controller.rb:46:in 'create'

注意:如果是凭据模型

def hash_password
    self.salt = ActiveSupport::SecureRandom.base64(8)
    plainBlock = "ABCD1234"
    blowfish = Crypt::Blowfish.new(self.salt)
    self.pass = blowfish.encrypt_block(plainBlock)
  end

它有效,但密码(显然)始终是ABCD1234。上面的代码,意味着问题是在blowfish.encrypt_block函数中的self.pass。

我做错了什么?

如果我跳过before_save函数,它将作为非加密密码,因此我排除了与路由相关的问题。

非常感谢你!

最好的问候!

ps:我正在使用Rails 3.0.8 ps:我正在关注此页http://crypt.rubyforge.org/blowfish.html

1 个答案:

答案 0 :(得分:2)

我有解决方案。问题是:

self.salt = ActiveSupport::SecureRandom.base64(8)

在这种情况下,self.salt必须长度为56个字节,因为blowfish需要一个56byte的密钥。

self.pass = blowfish.encrypt_block(self.pass)

在blofwish中,self.pass必须是8个字节长度

最诚挚的问候和感谢您的支持