
applications to use EVP. Add missing calls to HMAC_cleanup() and don't assume HMAC_CTX can be copied using memcpy(). Note: this is almost identical to the patch submitted to openssl-dev by Verdon Walker <VWalker@novell.com> except some redundant EVP_add_digest_()/EVP_cleanup() calls were removed and some changes made to avoid compiler warnings.
The stuff in here is based on patches supplied to me by Steven Schoch <schoch@sheba.arc.nasa.gov> to do DSS. I have since modified a them a little but a debt of gratitude is due for doing the initial work.