def METHOD_NAME(self):
    # Early versions of MCUboot (< v1.5.0) required ECDSA
    # signatures to be padded to 72 bytes.  Because the DER
    # encoding is done with signed integers, the size of the
    # signature will vary depending on whether the high bit is set
    # in each value.  This padding was done in a
    # not-easily-reversible way (by just adding zeros).
    #
    # The signing code no longer requires this padding, and newer
    # versions of MCUboot don't require it.  But, continue to
    # return the total length so that the padding can be done if
    # requested.
    return 72