Recommended crypto libraries? (SHA-256)

[Phil Endecott]

Dear All,

Does anyone have any experience to share regarding
cryptographic libraries that can be compiled for
emscripten?

Currently I only need an HMAC SHA-256 implementation.
I am wondering if I could extract this from one of the
more "light weight" crypto libraries by copying a
handful of source files, rather than trying to build
a complete library.

This is for a C++ application.

Any suggestions?


Thanks, Phil.