<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def GetCSR(self):
 """Return our CSR."""

    return rdf_crypto.CertificateSigningRequest(
        common_name=self.common_name, private_key=self.private_key)