Class: EC::PublicKey

Inherits:
Object
  • Object
show all
Defined in:
lib/elliptic.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, group: nil) ⇒ PublicKey

Returns a new instance of PublicKey.



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# File 'lib/elliptic.rb', line 108

def initialize( *args, group: nil )
  point = if args.size == 2   ## assume (x,y) raw integer points
             @pt = Point.new( *args, group: group )
             @pt.to_ec_point ## convert point to openssl (native) class
          else
            ##  "restore"  public key (only) from point for verify
            ## - OpenSSL::PKey::EC::Point   ## assume public key only (restore pkey object for verify?)
            ## - Point
            if args[0].is_a?( Point )
              @pt = args[0]
              @pt.to_ec_point
            else
              args[0]  ## assume it is already OpenSSL::PKey::EC::Point
            end
          end

  ## note: (auto)get group from point
  @pkey = OpenSSL::PKey::EC.new( point.group )
  @pkey.public_key = point
end

Class Method Details

.convert(*args, **kwargs) ⇒ Object 



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# File 'lib/elliptic.rb', line 98

def self.convert( *args, **kwargs )
  if args.size==1 && args[0].is_a?( PublicKey )
    args[0]   ## pass through as is (already a public key)
  else
    new( *args, group: kwargs[:group] )
  end
end

Instance Method Details

#group ⇒ Object 



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# File 'lib/elliptic.rb', line 129

def group() @pkey.group; end

#point ⇒ Object 



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# File 'lib/elliptic.rb', line 132

def point
  ## cache returned point - why? why not?
  @pt ||= Point.new( @pkey.public_key )
  @pt
end

#public? ⇒ Boolean

todo/check: keep - needed? - why? why not?

Returns:

  • (Boolean) 


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# File 'lib/elliptic.rb', line 148

def public?() @pkey.public?; end

#to_text ⇒ Object

helpers for debugging



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# File 'lib/elliptic.rb', line 147

def to_text() @pkey.to_text; end

#verify?(message, signature) ⇒ Boolean Also known as: valid_signature?

Returns:

  • (Boolean) 


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# File 'lib/elliptic.rb', line 140

def verify?( message, signature )
  signature_der = signature.to_der
  @pkey.dsa_verify_asn1( message, signature_der )
end