EVP_MD_CTX_new - dynamic allocation

[sushma s <sushma.bharadwaja@xxxxxxxxx>]

In OpenSSL 1.0, we could stack allocate EVP_MD_CTX. 

Now this is replaced with 'EVP_MD_CTX_new' which needs to be dynamically allocated. 

Are there any alternatives to 'EVP_MD_CTX_new' which enables us to continue to do a stack allocation for the digest routines. 

NOTE: we have some constraints wrt dynamic allocation in our work. 

Thanks.