sha256.h (615B)
1 /* public domain sha256 implementation based on fips180-3 */ 2 3 struct sha256 { 4 uint64_t len; /* processed message length */ 5 uint32_t h[8]; /* hash state */ 6 uint8_t buf[64]; /* message block buffer */ 7 }; 8 9 enum { SHA256_DIGEST_LENGTH = 32 }; 10 11 /* reset state */ 12 void sha256_init(void *ctx); 13 /* process message */ 14 void sha256_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 sha256_sum(void *ctx, uint8_t md[SHA256_DIGEST_LENGTH]);