What is it all about?
GnuTLS(GNU Transport Layer Security Library) is a free cross-platform secure communications library which used many cryptographic components, including SSL,TLS and DTLS protocols. it's supply AIPs which enables secure communications for applications over the network transport layer, written in C language, but it has interfaces to many programming languages.
• Support for TLS 1.2, TLS 1.1, TLS 1.0, and SSL 3.0 protocols • Support for DTLS 1.2, and DTLS 1.0, protocols • Support for certificate path validation, as well as DANE and trust on first use. • Support for the Online Certificate Status Protocol (OCSP). • Support for multiple certificate types including X.509 and OpenPGP certificates. • Support for public key methods, including RSA and Elliptic curves, as well as password and key authentication methods such as SRP and PSK protocols. • Support for all the strong encryption algorithms, including AES and Camellia. • Support for CPU-assisted cryptography with VIA padlock and AES-NI instruction sets. • Support for cryptographic accelerator drivers via /dev/crypto. • Supports natively HSMs and cryptographic tokens, via PKCS #11 and the Trusted Platform Module (TPM). • Runs on most Unix platforms and Windows.