GnuTLS (GNU by Layer http://www.aliyun.com/zixun/aggregation/16952.html ">security Library") is a secure communications library, SSL and TLS protocols and related technologies are implemented. It provides a simple C language Application programming interface (API) to access secure communication protocols, as well as APIs to parse and write X.509, pkcs#12, OpenPGP, and other required structures. The goal is to become portable and efficient security and interoperability.
GNU by Layer Security Library 3.0.18 This version is mainly a bug fix for the current stable branch. It includes a related date (y2k38) fix, fixes the old via processor, and adds a new API for meeting random numbers and certificate resolution extraction.
Software Information: http://www.gnu.org/software/gnutls/
Download Address: http://www.gnu.org/software/gnutls/download.html