publisher.py 文件源码

python
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项目:solaris-ips 作者: oracle 项目源码 文件源码
def __verify_x509_signature(self, c, key):
                """Verify the signature of a certificate or CRL 'c' against a
                provided public key 'key'."""

                verifier = key.verifier(
                    c.signature, padding.PKCS1v15(),
                    c.signature_hash_algorithm)

                if isinstance(c, x509.Certificate):
                        data = c.tbs_certificate_bytes
                elif isinstance(c, x509.CertificateRevocationList):
                        data = c.tbs_certlist_bytes
                else:
                        raise AssertionError("Invalid x509 object for "
                            "signature verification: {0}".format(type(c)))

                verifier.update(data)
                try:
                        verifier.verify()
                        return True
                except Exception:
                        return False
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