Module: KBEncryptionMixin

Included in:
KBEngine, KBIndex, KBRecnoIndex
Defined in:
lib/kirbybase.rb

Overview

KBEncryptionMixin

Constant Summary collapse

EN_STR = 
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' + \
'0123456789.+-,$:|&;_ '
EN_STR_LEN = 
EN_STR.length
EN_KEY1 =

*** DO NOT CHANGE ***

")2VER8GE\"87-E\n"
EN_KEY = 

      
        
EN_KEY_LEN =
          
        

        
EN_KEY.length


      
    

  







  
    

      Instance Method Summary
      collapse
    


    
  



  

    
Instance Method Details


    
      

  

  
    #encrypt_str(s)  ⇒ Object 
  

  

  




  

    



encrypt_str





++ Returns an encrypted string, using the Vignere Cipher.



  





  



  

    
      


318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338

    		
    
      
# File 'lib/kirbybase.rb', line 318

def encrypt_str(s)
    new_str = ''
    i_key = -1
    s.each_byte do |c|
        if i_key < EN_KEY_LEN - 1
            i_key += 1
        else
            i_key = 0
        end

        if EN_STR.index(c.chr).nil?
            new_str << c.chr
            next
        end

        i_from_str = EN_STR.index(EN_KEY[i_key]) + EN_STR.index(c.chr)
        i_from_str = i_from_str - EN_STR_LEN if i_from_str >= EN_STR_LEN
        new_str << EN_STR[i_from_str]
    end
    return new_str
end


    		
  





    
      

  

  
    #unencrypt_str(s)  ⇒ Object 
  

  

  




  

    



unencrypt_str





++ Returns an unencrypted string, using the Vignere Cipher.



  





  



  

    
      


346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366

    		
    
      
# File 'lib/kirbybase.rb', line 346

def unencrypt_str(s)
    new_str = ''
    i_key = -1
    s.each_byte do |c|
        if i_key < EN_KEY_LEN - 1
            i_key += 1
        else
            i_key = 0
        end

        if EN_STR.index(c.chr).nil?
            new_str << c.chr
            next
        end

        i_from_str = EN_STR.index(c.chr) - EN_STR.index(EN_KEY[i_key])
        i_from_str = i_from_str + EN_STR_LEN if i_from_str < 0
        new_str << EN_STR[i_from_str]
    end
    return new_str
end