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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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9939049085
Now that all sm3_base users have been converted to use the API partial block handling, remove the partial block helpers as well as the lib/crypto functions. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* sm3_base.h - core logic for SM3 implementations
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*
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* Copyright (C) 2017 ARM Limited or its affiliates.
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* Written by Gilad Ben-Yossef <gilad@benyossef.com>
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*/
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#ifndef _CRYPTO_SM3_BASE_H
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#define _CRYPTO_SM3_BASE_H
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#include <crypto/internal/hash.h>
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#include <crypto/sm3.h>
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#include <linux/math.h>
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#include <linux/module.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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typedef void (sm3_block_fn)(struct sm3_state *sst, u8 const *src, int blocks);
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static inline int sm3_base_init(struct shash_desc *desc)
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{
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sm3_init(shash_desc_ctx(desc));
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return 0;
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}
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static inline int sm3_base_do_update_blocks(struct shash_desc *desc,
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const u8 *data, unsigned int len,
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sm3_block_fn *block_fn)
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{
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unsigned int remain = len - round_down(len, SM3_BLOCK_SIZE);
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struct sm3_state *sctx = shash_desc_ctx(desc);
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sctx->count += len - remain;
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block_fn(sctx, data, len / SM3_BLOCK_SIZE);
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return remain;
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}
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static inline int sm3_base_do_finup(struct shash_desc *desc,
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const u8 *src, unsigned int len,
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sm3_block_fn *block_fn)
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{
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unsigned int bit_offset = SM3_BLOCK_SIZE / 8 - 1;
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struct sm3_state *sctx = shash_desc_ctx(desc);
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union {
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__be64 b64[SM3_BLOCK_SIZE / 4];
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u8 u8[SM3_BLOCK_SIZE * 2];
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} block = {};
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if (len >= SM3_BLOCK_SIZE) {
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int remain;
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remain = sm3_base_do_update_blocks(desc, src, len, block_fn);
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src += len - remain;
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len = remain;
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}
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if (len >= bit_offset * 8)
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bit_offset += SM3_BLOCK_SIZE / 8;
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memcpy(&block, src, len);
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block.u8[len] = 0x80;
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sctx->count += len;
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block.b64[bit_offset] = cpu_to_be64(sctx->count << 3);
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block_fn(sctx, block.u8, (bit_offset + 1) * 8 / SM3_BLOCK_SIZE);
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memzero_explicit(&block, sizeof(block));
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return 0;
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}
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static inline int sm3_base_finish(struct shash_desc *desc, u8 *out)
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{
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struct sm3_state *sctx = shash_desc_ctx(desc);
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__be32 *digest = (__be32 *)out;
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int i;
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for (i = 0; i < SM3_DIGEST_SIZE / sizeof(__be32); i++)
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put_unaligned_be32(sctx->state[i], digest++);
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return 0;
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}
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#endif /* _CRYPTO_SM3_BASE_H */
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