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b6ac1dac2f
Instead of exposing the mips-optimized SHA-1 code via mips-specific crypto_shash algorithms, instead just implement the sha1_blocks() library function. This is much simpler, it makes the SHA-1 library functions be mips-optimized, and it fixes the longstanding issue where the mips-optimized SHA-1 code was disabled by default. SHA-1 still remains available through crypto_shash, but individual architectures no longer need to handle it. Note: to see the diff from arch/mips/cavium-octeon/crypto/octeon-sha1.c to lib/crypto/mips/sha1.h, view this commit with 'git show -M10'. Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20250712232329.818226-10-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Cryptographic API.
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*
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* SHA1 Secure Hash Algorithm.
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*
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* Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
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*
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* Based on crypto/sha1_generic.c, which is:
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*
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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*/
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#include <asm/octeon/crypto.h>
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#include <asm/octeon/octeon.h>
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/*
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* We pass everything as 64-bit. OCTEON can handle misaligned data.
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*/
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static void octeon_sha1_store_hash(struct sha1_block_state *state)
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{
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u64 *hash = (u64 *)&state->h[0];
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union {
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u32 word[2];
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u64 dword;
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} hash_tail = { { state->h[4], } };
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write_octeon_64bit_hash_dword(hash[0], 0);
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write_octeon_64bit_hash_dword(hash[1], 1);
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write_octeon_64bit_hash_dword(hash_tail.dword, 2);
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memzero_explicit(&hash_tail.word[0], sizeof(hash_tail.word[0]));
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}
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static void octeon_sha1_read_hash(struct sha1_block_state *state)
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{
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u64 *hash = (u64 *)&state->h[0];
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union {
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u32 word[2];
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u64 dword;
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} hash_tail;
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hash[0] = read_octeon_64bit_hash_dword(0);
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hash[1] = read_octeon_64bit_hash_dword(1);
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hash_tail.dword = read_octeon_64bit_hash_dword(2);
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state->h[4] = hash_tail.word[0];
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memzero_explicit(&hash_tail.dword, sizeof(hash_tail.dword));
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}
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static void sha1_blocks(struct sha1_block_state *state,
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const u8 *data, size_t nblocks)
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{
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struct octeon_cop2_state cop2_state;
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unsigned long flags;
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if (!octeon_has_crypto())
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return sha1_blocks_generic(state, data, nblocks);
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flags = octeon_crypto_enable(&cop2_state);
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octeon_sha1_store_hash(state);
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do {
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const u64 *block = (const u64 *)data;
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write_octeon_64bit_block_dword(block[0], 0);
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write_octeon_64bit_block_dword(block[1], 1);
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write_octeon_64bit_block_dword(block[2], 2);
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write_octeon_64bit_block_dword(block[3], 3);
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write_octeon_64bit_block_dword(block[4], 4);
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write_octeon_64bit_block_dword(block[5], 5);
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write_octeon_64bit_block_dword(block[6], 6);
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octeon_sha1_start(block[7]);
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data += SHA1_BLOCK_SIZE;
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} while (--nblocks);
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octeon_sha1_read_hash(state);
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octeon_crypto_disable(&cop2_state, flags);
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}
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