1#ifndef HASH_H2#define HASH_H34#if defined(SHA1_PPC)5#include "ppc/sha1.h"6#elif defined(SHA1_APPLE)7#include <CommonCrypto/CommonDigest.h>8#elif defined(SHA1_OPENSSL)9#include <openssl/sha.h>10#else /* SHA1_BLK */11#include "block-sha1/sha1.h"12#endif1314#endif