sha256.h (690B)
- // SPDX-FileCopyrightText: public domain sha256 implementation based on fips180-3
- // SPDX-License-Identifier: 0BSD
- #include <stdint.h>
- struct sha256
- {
- uint64_t len; /* processed message length */
- uint32_t h[8]; /* hash state */
- uint8_t buf[64]; /* message block buffer */
- };
- enum
- {
- SHA256_DIGEST_LENGTH = 32
- };
- /* reset state */
- void sha256_init(void *ctx);
- /* process message */
- void sha256_update(void *ctx, const void *m, unsigned long len);
- /* get message digest */
- /* state is ruined after sum, keep a copy if multiple sum is needed */
- /* part of the message might be left in s, zero it if secrecy is needed */
- void sha256_sum(void *ctx, uint8_t md[SHA256_DIGEST_LENGTH]);