Sha256: 159b6778e8c7e79b6f5955d75ca2547e8b152ac93a5a7d321dbd1a919dca94f5

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Size: 1010 Bytes

Versions: 2

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Stored size: 1010 Bytes

Contents

module Saml
  module Kit
    class Cryptography
      attr_reader :private_key

      def initialize(private_key = Saml::Kit.configuration.encryption_private_key)
        @private_key = private_key
      end

      def decrypt(data)
        encrypt_data = data['EncryptedData']
        symmetric_key = symmetric_key_from(encrypt_data)
        cipher_text = Base64.decode64(encrypt_data["CipherData"]["CipherValue"])
        to_plaintext(cipher_text, symmetric_key, encrypt_data["EncryptionMethod"]['Algorithm'])
      end

      private

      def symmetric_key_from(encrypted_data)
        encrypted_key = encrypted_data['KeyInfo']['EncryptedKey']
        cipher_text = Base64.decode64(encrypted_key['CipherData']['CipherValue'])
        to_plaintext(cipher_text, private_key, encrypted_key["EncryptionMethod"]['Algorithm'])
      end

      def to_plaintext(cipher_text, symmetric_key, algorithm)
        return Crypto.decryptor_for(algorithm, symmetric_key).decrypt(cipher_text)
      end
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version Path
saml-kit-0.2.1 lib/saml/kit/cryptography.rb
saml-kit-0.2.0 lib/saml/kit/cryptography.rb