--- W variable moved to the heap;
--- return type changed to int, returning 0 for success;
--- chain of dependency updated to propagate the error in Sha256Update and Sha256Final functions.
sha512: Transform and Transform384 refactory to reduce stack usage: (128 bytes - pointer size) moved to the heap in each function
--- W variable moved to the heap;
--- return type changed to int, returning 0 for success;
--- chain of dependency updated to propagate the error in Sha512Update, Sha512Final, Sha384Update and Sha384Final functions.
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