EVP_MD_CTX_new
ctx = EVP_MD_CTX_new();
ctx2 = EVP_MD_CTX_new();
if ((md_ctx = EVP_MD_CTX_new()) == NULL)
EVP_MD_CTX *EVP_MD_CTX_new(void);
if ((ctx = EVP_MD_CTX_new()) == NULL)
if ((ctx = EVP_MD_CTX_new()) == NULL)