Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
 * Helper functions for BLAKE2s implementations.
 * Keep this in sync with the corresponding BLAKE2b header.
 */
 
#ifndef _CRYPTO_INTERNAL_BLAKE2S_H
#define _CRYPTO_INTERNAL_BLAKE2S_H
 
#include <crypto/blake2s.h>
#include <crypto/internal/hash.h>
#include <linux/string.h>
 
void blake2s_compress_generic(struct blake2s_state *state,const u8 *block,
<------><------><------>      size_t nblocks, const u32 inc);
 
void blake2s_compress_arch(struct blake2s_state *state,const u8 *block,
<------><------><------>   size_t nblocks, const u32 inc);
 
bool blake2s_selftest(void);
 
static inline void blake2s_set_lastblock(struct blake2s_state *state)
{
<------>state->f[0] = -1;
}
 
typedef void (*blake2s_compress_t)(struct blake2s_state *state,
<------><------><------><------>   const u8 *block, size_t nblocks, u32 inc);
 
/* Helper functions for BLAKE2s shared by the library and shash APIs */
 
static inline void __blake2s_update(struct blake2s_state *state,
<------><------><------><------>    const u8 *in, size_t inlen,
<------><------><------><------>    blake2s_compress_t compress)
{
<------>const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
 
<------>if (unlikely(!inlen))
<------><------>return;
<------>if (inlen > fill) {
<------><------>memcpy(state->buf + state->buflen, in, fill);
<------><------>(*compress)(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);
<------><------>state->buflen = 0;
<------><------>in += fill;
<------><------>inlen -= fill;
<------>}
<------>if (inlen > BLAKE2S_BLOCK_SIZE) {
<------><------>const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
<------><------>/* Hash one less (full) block than strictly possible */
<------><------>(*compress)(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);
<------><------>in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
<------><------>inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
<------>}
<------>memcpy(state->buf + state->buflen, in, inlen);
<------>state->buflen += inlen;
}
 
static inline void __blake2s_final(struct blake2s_state *state, u8 *out,
<------><------><------><------>   blake2s_compress_t compress)
{
<------>blake2s_set_lastblock(state);
<------>memset(state->buf + state->buflen, 0,
<------>       BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
<------>(*compress)(state, state->buf, 1, state->buflen);
<------>cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
<------>memcpy(out, state->h, state->outlen);
}
 
/* Helper functions for shash implementations of BLAKE2s */
 
struct blake2s_tfm_ctx {
<------>u8 key[BLAKE2S_KEY_SIZE];
<------>unsigned int keylen;
};
 
static inline int crypto_blake2s_setkey(struct crypto_shash *tfm,
<------><------><------><------><------>const u8 *key, unsigned int keylen)
{
<------>struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(tfm);
 
<------>if (keylen == 0 || keylen > BLAKE2S_KEY_SIZE)
<------><------>return -EINVAL;
 
<------>memcpy(tctx->key, key, keylen);
<------>tctx->keylen = keylen;
 
<------>return 0;
}
 
static inline int crypto_blake2s_init(struct shash_desc *desc)
{
<------>const struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
<------>struct blake2s_state *state = shash_desc_ctx(desc);
<------>unsigned int outlen = crypto_shash_digestsize(desc->tfm);
 
<------>__blake2s_init(state, outlen, tctx->key, tctx->keylen);
<------>return 0;
}
 
static inline int crypto_blake2s_update(struct shash_desc *desc,
<------><------><------><------><------>const u8 *in, unsigned int inlen,
<------><------><------><------><------>blake2s_compress_t compress)
{
<------>struct blake2s_state *state = shash_desc_ctx(desc);
 
<------>__blake2s_update(state, in, inlen, compress);
<------>return 0;
}
 
static inline int crypto_blake2s_final(struct shash_desc *desc, u8 *out,
<------><------><------><------>       blake2s_compress_t compress)
{
<------>struct blake2s_state *state = shash_desc_ctx(desc);
 
<------>__blake2s_final(state, out, compress);
<------>return 0;
}
 
#endif /* _CRYPTO_INTERNAL_BLAKE2S_H */