sha512.h - sbase - suckless unix tools
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       sha512.h (618B)
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            1 /* public domain sha512 implementation based on fips180-3 */
            2 
            3 struct sha512 {
            4         uint64_t len;     /* processed message length */
            5         uint64_t h[8];    /* hash state */
            6         uint8_t buf[128]; /* message block buffer */
            7 };
            8 
            9 enum { SHA512_DIGEST_LENGTH = 64 };
           10 
           11 /* reset state */
           12 void sha512_init(void *ctx);
           13 /* process message */
           14 void sha512_update(void *ctx, const void *m, unsigned long len);
           15 /* get message digest */
           16 /* state is ruined after sum, keep a copy if multiple sum is needed */
           17 /* part of the message might be left in s, zero it if secrecy is needed */
           18 void sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH]);