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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <stddef.h>
#include <stdint.h>
#define SHA256_DIGEST_SIZE 32
struct sha256_ctx {
uint32_t H[8];
union {
uint64_t total64;
#define TOTAL64_low (1 - (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
#define TOTAL64_high (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
uint32_t total[2];
};
uint32_t buflen;
union {
uint8_t buffer[128]; /* NB: always correctly aligned for UINT32. */
uint32_t buffer32[32];
uint64_t buffer64[16];
};
};
void sha256_init_ctx(struct sha256_ctx *ctx);
uint8_t *sha256_finish_ctx(struct sha256_ctx *ctx, uint8_t resbuf[static SHA256_DIGEST_SIZE]);
void sha256_process_bytes(const void *buffer, size_t len, struct sha256_ctx *ctx);
static inline void sha256_process_bytes_and_size(const void *buffer, size_t len, struct sha256_ctx *ctx) {
sha256_process_bytes(&len, sizeof(len), ctx);
sha256_process_bytes(buffer, len, ctx);
}
uint8_t* sha256_direct(const void *buffer, size_t sz, uint8_t result[static SHA256_DIGEST_SIZE]);
#define SHA256_DIRECT(buffer, sz) sha256_direct(buffer, sz, (uint8_t[SHA256_DIGEST_SIZE]) {})
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