verifying_openssl.rb

  def verify_pem(cert_file, data, signature)
    public_key = OpenSSL::PKey::RSA.new(cert_file)
    return public_key.verify(OpenSSL::Digest::SHA1.new, Base64.decode64(signature), data)
  end

  def verify_pem_public(cert_file, data, signature)
    public_key = OpenSSL::PKey::RSA.new(cert_file).public_key
    return public_key.verify(OpenSSL::Digest::SHA1.new, Base64.decode64(signature), data)
  end

  def verify_x509(cert_file, data, signature)
    public_key = OpenSSL::X509::Certificate.new(cert_file)
    return public_key.verify(OpenSSL::Digest::SHA1.new, Base64.decode64(signature), data)
  end

  def verify_x509_public(cert_file, data, signature)
    public_key = OpenSSL::X509::Certificate.new(cert_file).public_key
    return public_key.verify(OpenSSL::Digest::SHA1.new, Base64.decode64(signature), data)
  end