Class: JSON::LD::SIGNATURE::RsaVerifier

Inherits:
Object
  • Object
show all
Defined in:
lib/json/ld/signature/rsaVerifier.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#priv ⇒ Object 



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# File 'lib/json/ld/signature/rsaVerifier.rb', line 14

def priv
  @priv
end

#pub ⇒ Object 



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# File 'lib/json/ld/signature/rsaVerifier.rb', line 10

def pub
  @pub
end

Instance Method Details

#verify(input, options = {}) ⇒ Object 



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# File 'lib/json/ld/signature/rsaVerifier.rb', line 18

def verify(input, options = {})
  
  # We require a publicKeyPem in the options hash
#      if options['publicKeyPem'].nil?
#        raise JsonLdSignatureError::MissingKey, "options parameter must include publicKeyPem"
#      end

  # The publicKeyPem can be either a String or a parsed RSA key
#      publicKey = case options['publicKeyPem']
#      when String then OpenSSL::PKey::RSA.new options['publicKeyPem']
#      when OpenSSL::PKey::RSA then options['publicKeyPem']
#      else 
#        raise JsonLdSignatureError::InvalidKeyType, "key must be RSA Key or PEM String"
#      end
  publicKey = @pub
  
  # Check the input, it should either be a String or a parsed JSON object

  jsonld = case input
  when String then 
  begin
      JSON.parse(input)        
    rescue JSON::ParserError => e
        raise JsonLdSignatureError::InvalidJsonLdDocument, e.message
  end 
  when Hash then input
  else
    raise JsonLdSignatureError::InvalidJsonLdDocument
  end
  
  signature = jsonld['signature']
  
  created = signature['created']
  creator = signature['creator']
  signatureValue = signature['signatureValue']
  domain = signature['domain']
  nonce = signature['nonce']
  
  uri = URI(creator)
#      response = Net::HTTP.get_response(uri)
  
#      case response.code
#        when "200"
#          publicKey = OpenSSL::PKey::RSA.new response.body
#        else
#          raise JsonLdSignatureError::UnreachableKey, 
#             "Key #{creator} could not be retrieved. Error: #{response.code}, #{response.message}"
#      end
  
  normOpts = {
    'nonce' => nonce,
    'domain' => domain,
    'created' => created,
    'creator' => creator
  }

  normalizedGraph = JSON::LD::SIGNATURE::generateNormalizedGraph jsonld, normOpts

  digest = OpenSSL::Digest::SHA256.new
  publicKey.verify digest, Base64.decode64(signatureValue), normalizedGraph
end