B M¯]•"ã@s†dZddlmZmZmZmZddlZddlmZm Z m Z ddl m Z m Z ejdkZdZd d „Zdd d „Zdd„Zddd„Zdd„ZdS)zÈ Functions for parsing and dumping using the ASN.1 DER encoding. Exports the following items: - emit() - parse() - peek() Other type classes are defined that help compose the types listed above. é)Úunicode_literalsÚdivisionÚabsolute_importÚprint_functionNé)Úbyte_clsÚchr_clsÚ type_name)Úint_from_bytesÚ int_to_bytes)ézO}||d>O}|dkrpd}x0|dkr\t||d@Bƒ|}|sRd}|d?}q.Wt|dBƒ|}n|t||Bƒ7}t|ƒ}|dkrž|t|ƒ7}n$t|ƒ}|tdt|ƒBƒ7}||7}|S) aÇ Constructs the header bytes for an ASN.1 object :param class_: An integer ASN.1 class value: 0 (universal), 1 (application), 2 (context), 3 (private) :param method: An integer ASN.1 method value: 0 (primitive), 1 (constructed) :param tag: An integer ASN.1 tag value :param contents: A byte string of the encoded byte contents :return: A byte string of the ASN.1 DER header r)rr'r(r!r#r"r$)rrr ) rrrrÚheaderZid_numZcont_bitÚlengthZ length_bytesrrrrïs(    r)F)rF)Ú__doc__Z __future__rrrrÚsysZ_typesrrr Úutilr r Ú version_infor+r*rrrrrrrrrÚ s 1 ' d