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Class: Net::SMTP::AuthCramMD5

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Authenticator
Instance Chain:
self, Authenticator
Inherits: Net::SMTP::Authenticator
Defined in: lib/net/smtp/auth_cram_md5.rb

Constant Summary

Class Method Summary

Authenticator - Inherited

.auth_class, .auth_classes, .auth_type, .check_args, .new

Instance Attribute Summary

Authenticator - Inherited

#smtp

Instance Method Summary

Authenticator - Inherited

#base64_encode, #continue, #finish

Constructor Details

This class inherits a constructor from Net::SMTP::Authenticator

Instance Method Details

#auth(user, secret)

[ GitHub ] 

  


# File 'lib/net/smtp/auth_cram_md5.rb', line 12



def auth(user, secret)
  challenge = continue('AUTH CRAM-MD5')
  crammed = cram_md5_response(secret, challenge.unpack1('m'))
  finish(base64_encode("#{user} #{crammed}"))
end


  








  

    #cram_md5_response(secret, challenge)  
  



  

    

CRAM-MD5: [RFC2195]


  



  [ GitHub ]


  

  


# File 'lib/net/smtp/auth_cram_md5.rb', line 22



def cram_md5_response(secret, challenge)
  tmp = digest_class::MD5.digest(cram_secret(secret, IMASK) + challenge)
  digest_class::MD5.hexdigest(cram_secret(secret, OMASK) + tmp)
end


  








  

    #cram_secret(secret, mask)  
  

  [ GitHub ]


  

  


# File 'lib/net/smtp/auth_cram_md5.rb', line 29



def cram_secret(secret, mask)
  secret = digest_class::MD5.digest(secret) if secret.size > CRAM_BUFSIZE
  buf = secret.ljust(CRAM_BUFSIZE, "\0")
  0.upto(buf.size - 1) do |i|
    buf[i] = (buf[i].ord ^ mask).chr
  end
  buf
end


  








  

    #digest_class  
  

  [ GitHub ]


  

  


# File 'lib/net/smtp/auth_cram_md5.rb', line 38



def digest_class
  @digest_class ||= if defined?(OpenSSL::Digest)
                      OpenSSL::Digest
                    elsif defined?(::Digest)
                      ::Digest
                    else
                      raise '"openssl" or "digest" library is required'
                    end
end