Class: Net::DNS::RR::CERT

Inherits:
Net::DNS::RR show all
Defined in:
lib/Net/DNS/RR/CERT.rb

Overview

RFC 2782

Constant Summary collapse

FORMATS = 
{
'PKIX' => 1,
'SPKI' => 2,
'PGP'  => 3,
'URI'  => 253,
'OID'  => 254,
}
R_FORMATS = 
FORMATS.invert
ALGORITHMS = 
{
'RSAMD5'     => 1,
'DH'         => 2,
'DSA'        => 3,
'ECC'        => 4,
'INDIRECT'   => 252,
'PRIVATEDNS' => 253,
'PRIVATEOID' => 254,
}
R_ALGORITHMS = 
ALGORITHMS.invert

Constants inherited from Net::DNS::RR

RRS

Instance Attribute Summary collapse

Attributes inherited from Net::DNS::RR

#name, #rdata, #rdlength, #rrclass, #ttl, #type

Instance Method Summary collapse

Methods inherited from Net::DNS::RR

#_canonicalRdata, #_canonicaldata, _get_subclass, _name2wire, #_name2wire, build_regex, create, #create_rrsort_func, #data, #get_rrsort_func, #init, #init_rrsort_func, #inspect, new_from_data, new_from_hash, new_from_string, #set_rrsort_func

Instance Attribute Details

#algorithm ⇒ Object

print “algorithm = ”, rr.algorithm, “n”



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# File 'lib/Net/DNS/RR/CERT.rb', line 59

def algorithm
  @algorithm
end

#certificate ⇒ Object

print “certificate = ”, rr.certificate, “n”



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# File 'lib/Net/DNS/RR/CERT.rb', line 64

def certificate
  @certificate
end

#format ⇒ Object

print “format = ”, rr.format, “n”



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# File 'lib/Net/DNS/RR/CERT.rb', line 49

def format
  @format
end

#tag ⇒ Object

print “tag = ”, rr.tag, “n”



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# File 'lib/Net/DNS/RR/CERT.rb', line 54

def tag
  @tag
end

Instance Method Details

#new_from_data(data, offset) ⇒ Object 



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# File 'lib/Net/DNS/RR/CERT.rb', line 87

def new_from_data(data, offset)
  if (@rdlength > 0)
    format, tag, algorithm = data.unpack("\@#{offset} n2C");
    
    offset        += 2 * Net::DNS::INT16SZ + 1;
    
    length      = @rdlength - (2 * Net::DNS::INT16SZ + 1);
    certificate = data[offset, length];
    
    @format      = format;
    @tag         = tag;
    @algorithm   = algorithm;
    @certificate = certificate;
  end
end

#new_from_hash(values) ⇒ Object 



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# File 'lib/Net/DNS/RR/CERT.rb', line 103

def new_from_hash(values)
  if values.has_key?(:format)
    @format = values[:format]
  end
  if values.has_key?(:tag)
    @tag = values[:tag]
  end
  if values.has_key?(:algorithm)
    @algorithm = values[:algorithm]
  end
  if values.has_key?(:certificate)
    @certificate = values[:certificate]
  end
end

#new_from_string(string) ⇒ Object 



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# File 'lib/Net/DNS/RR/CERT.rb', line 118

def new_from_string(string)
  if (string==nil)
    return
  end
  
  format, tag, algorithm, rest = string.split(" ")
  if (rest == nil) 
    return
  end
  
  # look up mnemonics
  # the "die"s may be rash, but proceeding would be dangerous
  if (algorithm =~ /\D/)
    if defined?ALGORITHMS[algorithm]
      algorithm = ALGORITHMS[algorithm]
    else
      raise RuntimeError,	"Unknown algorithm mnemonic: '#{algorithm}'"
    end
  end
  
  if (format =~ /\D/)
    if defined?FORMATS[format]
      format = FORMATS[format]
    else
      die "Unknown format mnemonic: '#{format}'"
    end
  end
  
  @format      = format;
  @tag        = tag;
  @algorithm   = algorithm;
  @certificate = Base64::decode64([rest].join(''));
end

#rdatastr ⇒ Object 



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# File 'lib/Net/DNS/RR/CERT.rb', line 152

def rdatastr
  rdatastr=""
  
  if (defined?@format)
    cert = Base64::encode64 @certificate;
    cert.gsub!(/\n/,"");
    
    format = @format
    if defined?R_FORMATS[@format] 
      format = R_FORMATS[@format]
    end
    
    algorithm = @algorithm;
    if  defined?R_ALGORITHMS[@algorithm]  
      algorithm = R_ALGORITHMS[@algorithm] 
    end
    
    rdatastr = "#{format} #{@tag} #{algorithm} #{cert}";
  else
    rdatastr = '';
  end
  
  return rdatastr;
end

#rr_rdata(packet, offset) ⇒ Object 



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# File 'lib/Net/DNS/RR/CERT.rb', line 177

def rr_rdata(packet, offset)
  rdata = "";
  
  if (defined?@format)
    rdata += [@format, @tag].pack("n2")
    rdata += [@algorithm].pack("C")
    rdata += @certificate
  end
  
  return rdata;
end