key.py 文件源码

def load_pkcs1_openssl_der(cls, keyfile):
        """Loads a PKCS#1 DER-encoded public key file from OpenSSL.

        :param keyfile: contents of a DER-encoded file that contains the public
            key, from OpenSSL.
        :return: a PublicKey object

        """

        from rsa.asn1 import OpenSSLPubKey
        from pyasn1.codec.der import decoder
        from pyasn1.type import univ

        (keyinfo, _) = decoder.decode(keyfile, asn1Spec=OpenSSLPubKey())

        if keyinfo['header']['oid'] != univ.ObjectIdentifier('1.2.840.113549.1.1.1'):
            raise TypeError("This is not a DER-encoded OpenSSL-compatible public key")

        return cls._load_pkcs1_der(keyinfo['key'][1:])