ASN1_INTEGER_get_uint64
if ((ASN1_INTEGER_get_uint64(&spkeylen, sparam->keyLength) == 0)
if (ASN1_INTEGER_get_uint64(&N, sparam->costParameter) == 0
|| ASN1_INTEGER_get_uint64(&r, sparam->blockSize) == 0
|| ASN1_INTEGER_get_uint64(&p, sparam->parallelizationParameter) == 0
int ASN1_INTEGER_get_uint64(uint64_t *pr, const ASN1_INTEGER *a);