ASN.1编解码模块，经典代码，实现了ASN.1各种编码方式的BER,DER,PER,XER的编码解码，代码非常美妙，是C的经典-ASN.1 encoding and decoding modules, the classic code, and implements the various ASN.1 encoding of the BER, DER, PER, XER encoding decoding, the code is very wonderful, is the classic