sshpubkeys/keys.py
def _process_ssh_rsa(self, data):
        """Parses ssh-rsa public keys."""
        current_position, raw_e = self._unpack_by_int(data, 0)
        current_position, raw_n = self._unpack_by_int(data, current_position)

        unpacked_e = self._parse_long(raw_e)
        unpacked_n = self._parse_long(raw_n)

        self.rsa = RSAPublicNumbers(unpacked_e, unpacked_n).public_key(default_backend())
        self.bits = self.rsa.key_size

        if self.strict_mode:
            min_length = self.RSA_MIN_LENGTH_STRICT
            max_length = self.RSA_MAX_LENGTH_STRICT
        else:
            min_length = self.RSA_MIN_LENGTH_LOOSE
            max_length = self.RSA_MAX_LENGTH_LOOSE
        if self.bits < min_length:
            raise TooShortKeyError(
                "%s key data can not be shorter than %s bits (was %s)" % (self.key_type, min_length, self.bits)
            )
        if self.bits > max_length:
            raise TooLongKeyError(
                "%s key data can not be longer than %s bits (was %s)" % (self.key_type, max_length, self.bits)
            )
        return current_position
def _process_ssh_rsa(self, data):
        """Parses ssh-rsa public keys."""
        current_position, raw_e = self._unpack_by_int(data, 0)
        current_position, raw_n = self._unpack_by_int(data, current_position)

        unpacked_e = self._parse_long(raw_e)
        unpacked_n = self._parse_long(raw_n)

        self.rsa = RSAPublicNumbers(unpacked_e, unpacked_n).public_key(default_backend())
        self.bits = self.rsa.key_size

        if self.strict_mode:
            min_length = self.RSA_MIN_LENGTH_STRICT
            max_length = self.RSA_MAX_LENGTH_STRICT
        else:
            min_length = self.RSA_MIN_LENGTH_LOOSE
            max_length = self.RSA_MAX_LENGTH_LOOSE
        if self.bits < min_length:
            raise TooShortKeyError(
                "%s key data can not be shorter than %s bits (was %s)" % (self.key_type, min_length, self.bits)
            )
        if self.bits > max_length:
            raise TooLongKeyError(
                "%s key data can not be longer than %s bits (was %s)" % (self.key_type, max_length, self.bits)
            )
        return current_position
Parses ssh-rsa public keys.