We`ve implemented ChaCha20 allowing for the use of both 128 bit and 256 bit keys and are in the process of implementing Poly1305 into wolfSSL. Both crypt tools and a suite using the two are on schedule to be released by the end of the summer.
The ChaCha20 and Poly1305 algorithms, originally developed by Bernstein, have been shown to be very secure. Further reading about these algorithms can be found in the link below.
http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-04
We`re excited about this addition to our code. If you have comments, questions, or need it in our code sooner than the end of this summer, let us know! We can be reached at facts@wolfssl.com or by phone at +1 425 245 8247.