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057edc9c8b
Move most of blake2s_update() and blake2s_final() into new inline functions __blake2s_update() and __blake2s_final() in include/crypto/internal/blake2s.h so that this logic can be shared by the shash helper functions. This will avoid duplicating this logic between the library and shash implementations. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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#ifndef BLAKE2S_INTERNAL_H
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#define BLAKE2S_INTERNAL_H
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#include <crypto/blake2s.h>
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#include <linux/string.h>
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struct blake2s_tfm_ctx {
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u8 key[BLAKE2S_KEY_SIZE];
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unsigned int keylen;
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};
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void blake2s_compress_generic(struct blake2s_state *state,const u8 *block,
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size_t nblocks, const u32 inc);
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void blake2s_compress_arch(struct blake2s_state *state,const u8 *block,
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size_t nblocks, const u32 inc);
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bool blake2s_selftest(void);
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static inline void blake2s_set_lastblock(struct blake2s_state *state)
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{
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state->f[0] = -1;
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}
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typedef void (*blake2s_compress_t)(struct blake2s_state *state,
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const u8 *block, size_t nblocks, u32 inc);
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static inline void __blake2s_update(struct blake2s_state *state,
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const u8 *in, size_t inlen,
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blake2s_compress_t compress)
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{
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const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
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if (unlikely(!inlen))
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return;
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if (inlen > fill) {
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memcpy(state->buf + state->buflen, in, fill);
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(*compress)(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);
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state->buflen = 0;
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in += fill;
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inlen -= fill;
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}
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if (inlen > BLAKE2S_BLOCK_SIZE) {
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const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
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/* Hash one less (full) block than strictly possible */
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(*compress)(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);
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in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
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inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
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}
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memcpy(state->buf + state->buflen, in, inlen);
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state->buflen += inlen;
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}
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static inline void __blake2s_final(struct blake2s_state *state, u8 *out,
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blake2s_compress_t compress)
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{
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blake2s_set_lastblock(state);
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memset(state->buf + state->buflen, 0,
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BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
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(*compress)(state, state->buf, 1, state->buflen);
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cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
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memcpy(out, state->h, state->outlen);
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}
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#endif /* BLAKE2S_INTERNAL_H */
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