#ifndef SHA_H#define SHA_H/* NIST Secure Hash Algorithm *//* heavily modified from Peter C. Gutmann's implementation *//* Useful defines & typedefs */#define SHA_BLOCKSIZE		64#define SHA_DIGESTSIZE		20typedef struct {    unsigned long digest[5];		/* message digest */    unsigned long count_lo, count_hi;	/* 64-bit bit count */    unsigned long data[16];		/* SHA data buffer */    int local;			/* unprocessed amount in data */} SHA_INFO;void sha_init(SHA_INFO *);void sha_update(SHA_INFO *, unsigned char *, int);void sha_final(SHA_INFO *);#endif /* SHA_H */