SHA512
SHA512(private_key, 32, az);
SHA512(private_key, 32, az);
LCRYPTO_USED(SHA512);
unsigned char *SHA512(const unsigned char *d, size_t n, unsigned char *md)
LCRYPTO_ALIAS(SHA512);
sha_func = SHA512;
unsigned char *SHA512(void* data, unsigned int data_len, unsigned char *digest);
SHA512(buf, lengths[j], md);