Check the size_t isn't larger than 32 bit

Assure that `size_t` isn't larger than 32 bit, with preprocessor check.
Using `#if SIZE_MAX > UINT_MAX`.

Author: Ron Eldor

features/cryptocell/FEATURE_CRYPTOCELL310/ccm_alt.c

@@ -85,7 +85,7 @@ int mbedtls_ccm_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
     if( iv_len < 7 || iv_len > 13 )
         return ( MBEDTLS_ERR_CCM_BAD_INPUT );
 
-#if defined(MBEDTLS_HAVE_INT64)
+#if SIZE_MAX > UINT_MAX
     if( length > 0xFFFFFFFF || add_len > 0xFFFFFFFF )
         return ( MBEDTLS_ERR_CCM_BAD_INPUT );
 #endif
@@ -122,7 +122,7 @@ int mbedtls_ccm_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
     if( iv_len < 7 || iv_len > 13 )
         return ( MBEDTLS_ERR_CCM_BAD_INPUT );
 
-#if defined(MBEDTLS_HAVE_INT64)
+#if SIZE_MAX > UINT_MAX
     if( length > 0xFFFFFFFF || add_len > 0xFFFFFFFF )
         return ( MBEDTLS_ERR_CCM_BAD_INPUT );
 #endif

features/cryptocell/FEATURE_CRYPTOCELL310/ecdsa_alt.c

@@ -78,7 +78,7 @@ int mbedtls_ecdsa_sign( mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s,
     mbedtls_rand_func_container cc_rand = { f_rng, p_rng };
     const CRYS_ECPKI_Domain_t*  pDomain =  CRYS_ECPKI_GetEcDomain ( convert_mbedtls_grp_id_to_crys_domain_id( grp->id ) );
 
-#if defined(MBEDTLS_HAVE_INT64)
+#if SIZE_MAX > UINT_MAX
     if( blen > 0xFFFFFFFF )
     {
         return ( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
@@ -176,7 +176,7 @@ int mbedtls_ecdsa_verify( mbedtls_ecp_group *grp,
     uint32_t signature_size = ( ( grp->nbits + 7 ) / 8 ) * 2;
     const CRYS_ECPKI_Domain_t*  pDomain =  CRYS_ECPKI_GetEcDomain ( convert_mbedtls_grp_id_to_crys_domain_id( grp->id ) );
 
-#if defined(MBEDTLS_HAVE_INT64)
+#if SIZE_MAX > UINT_MAX
     if( blen > 0xFFFFFFFF )
     {
         return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );