Failure of ..new() for CTX objects in openssl 1.1.1g

[prudvi raj <rajprudvi98@xxxxxxxxx>]

Hi,

we are upgrading our codebase to openssl 1.1.1g from openssl 1.0.2k

Previously, all the ctx objects are allocated memory using "calloc"

typedef struct CryptWrapMDContext_t
{
#ifdef OPENSSL
    EVP_MD_CTX  evpMDCtx;
......
    struct CryptWrapMDContext_t *pNext;
}

Allocation :  return ((CryptWrapMDContext_t *)  calloc (1, sizeof (CryptWrapMDContext_t)));

Now that in openssl 1.1.1 , as objects are opaque , we have to use pointers (*) & new()  . 

typedef struct CryptWrapMDContext_t
{
#ifdef OPENSSL
    EVP_MD_CTX *evpMDCtx;

......
    struct CryptWrapMDContext_t *pNext;
}
CryptWrapMDContext_t;

 So Allocation becomes : 

       CryptWrapMDContext_t *pTemp;

        pTemp = ((CryptWrapMDContext_t *) calloc (1, sizeof (CryptWrapMDContext_t)));

         pTemp-> evpMDCtx = EVP_MD_CTX_new();

        return pTemp;

But , we are seeing crash upon the call of  EVP_MD_CTX_new();  (new is returning null)

So, are there any probable reasons why the new() has failed ??

Regards,

prud.