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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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3007e90572
Use the BLOCK_HASH_UPDATE_BLOCKS helper instead of duplicating partial block handling. Also remove the unused lib/sha256 force-generic interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef _CRYPTO_INTERNAL_SHA2_H
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#define _CRYPTO_INTERNAL_SHA2_H
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#include <crypto/internal/simd.h>
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#include <crypto/sha2.h>
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#include <linux/compiler_attributes.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/unaligned.h>
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#if IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_SHA256)
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bool sha256_is_arch_optimized(void);
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#else
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static inline bool sha256_is_arch_optimized(void)
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{
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return false;
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}
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#endif
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void sha256_blocks_generic(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks);
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void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks);
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void sha256_blocks_simd(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks);
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static inline void sha256_choose_blocks(
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u32 state[SHA256_STATE_WORDS], const u8 *data, size_t nblocks,
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bool force_generic, bool force_simd)
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{
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if (!IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_SHA256) || force_generic)
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sha256_blocks_generic(state, data, nblocks);
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else if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_SHA256_SIMD) &&
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(force_simd || crypto_simd_usable()))
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sha256_blocks_simd(state, data, nblocks);
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else
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sha256_blocks_arch(state, data, nblocks);
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}
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static __always_inline void sha256_finup(
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struct crypto_sha256_state *sctx, u8 buf[SHA256_BLOCK_SIZE],
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size_t len, u8 out[SHA256_DIGEST_SIZE], size_t digest_size,
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bool force_generic, bool force_simd)
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{
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const size_t bit_offset = SHA256_BLOCK_SIZE - 8;
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__be64 *bits = (__be64 *)&buf[bit_offset];
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int i;
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buf[len++] = 0x80;
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if (len > bit_offset) {
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memset(&buf[len], 0, SHA256_BLOCK_SIZE - len);
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sha256_choose_blocks(sctx->state, buf, 1, force_generic,
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force_simd);
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len = 0;
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}
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memset(&buf[len], 0, bit_offset - len);
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*bits = cpu_to_be64(sctx->count << 3);
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sha256_choose_blocks(sctx->state, buf, 1, force_generic, force_simd);
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for (i = 0; i < digest_size; i += 4)
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put_unaligned_be32(sctx->state[i / 4], out + i);
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}
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#endif /* _CRYPTO_INTERNAL_SHA2_H */
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