linux/include/crypto/sha256_base.h
Al Viro 5f60d5f6bb move asm/unaligned.h to linux/unaligned.h
asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.

auto-generated by the following:

for i in `git grep -l -w asm/unaligned.h`; do
	sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
	sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
2024-10-02 17:23:23 -04:00

136 lines
3.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* sha256_base.h - core logic for SHA-256 implementations
*
* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
*/
#ifndef _CRYPTO_SHA256_BASE_H
#define _CRYPTO_SHA256_BASE_H
#include <asm/byteorder.h>
#include <linux/unaligned.h>
#include <crypto/internal/hash.h>
#include <crypto/sha2.h>
#include <linux/string.h>
#include <linux/types.h>
typedef void (sha256_block_fn)(struct sha256_state *sst, u8 const *src,
int blocks);
static inline int sha224_base_init(struct shash_desc *desc)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
sha224_init(sctx);
return 0;
}
static inline int sha256_base_init(struct shash_desc *desc)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
sha256_init(sctx);
return 0;
}
static inline int lib_sha256_base_do_update(struct sha256_state *sctx,
const u8 *data,
unsigned int len,
sha256_block_fn *block_fn)
{
unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
sctx->count += len;
if (unlikely((partial + len) >= SHA256_BLOCK_SIZE)) {
int blocks;
if (partial) {
int p = SHA256_BLOCK_SIZE - partial;
memcpy(sctx->buf + partial, data, p);
data += p;
len -= p;
block_fn(sctx, sctx->buf, 1);
}
blocks = len / SHA256_BLOCK_SIZE;
len %= SHA256_BLOCK_SIZE;
if (blocks) {
block_fn(sctx, data, blocks);
data += blocks * SHA256_BLOCK_SIZE;
}
partial = 0;
}
if (len)
memcpy(sctx->buf + partial, data, len);
return 0;
}
static inline int sha256_base_do_update(struct shash_desc *desc,
const u8 *data,
unsigned int len,
sha256_block_fn *block_fn)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
return lib_sha256_base_do_update(sctx, data, len, block_fn);
}
static inline int lib_sha256_base_do_finalize(struct sha256_state *sctx,
sha256_block_fn *block_fn)
{
const int bit_offset = SHA256_BLOCK_SIZE - sizeof(__be64);
__be64 *bits = (__be64 *)(sctx->buf + bit_offset);
unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
sctx->buf[partial++] = 0x80;
if (partial > bit_offset) {
memset(sctx->buf + partial, 0x0, SHA256_BLOCK_SIZE - partial);
partial = 0;
block_fn(sctx, sctx->buf, 1);
}
memset(sctx->buf + partial, 0x0, bit_offset - partial);
*bits = cpu_to_be64(sctx->count << 3);
block_fn(sctx, sctx->buf, 1);
return 0;
}
static inline int sha256_base_do_finalize(struct shash_desc *desc,
sha256_block_fn *block_fn)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
return lib_sha256_base_do_finalize(sctx, block_fn);
}
static inline int lib_sha256_base_finish(struct sha256_state *sctx, u8 *out,
unsigned int digest_size)
{
__be32 *digest = (__be32 *)out;
int i;
for (i = 0; digest_size > 0; i++, digest_size -= sizeof(__be32))
put_unaligned_be32(sctx->state[i], digest++);
memzero_explicit(sctx, sizeof(*sctx));
return 0;
}
static inline int sha256_base_finish(struct shash_desc *desc, u8 *out)
{
unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
struct sha256_state *sctx = shash_desc_ctx(desc);
return lib_sha256_base_finish(sctx, out, digest_size);
}
#endif /* _CRYPTO_SHA256_BASE_H */