/* SPDX-License-Identifier: GPL-2.0-only *//* * SM3 hash algorithm * * Copyright (C) 2017 ARM Limited or its affiliates. * Copyright (C) 2017 Gilad Ben-Yossef <gilad@benyossef.com> * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> */ #ifndef _CRYPTO_SM3_H#define _CRYPTO_SM3_H #include <linux/types.h> #define SM3_DIGEST_SIZE	32#define SM3_BLOCK_SIZE	64 #define SM3_IVA		0x7380166f#define SM3_IVB		0x4914b2b9#define SM3_IVC		0x172442d7#define SM3_IVD		0xda8a0600#define SM3_IVE		0xa96f30bc#define SM3_IVF		0x163138aa#define SM3_IVG		0xe38dee4d#define SM3_IVH		0xb0fb0e4e /* State for the SM3 compression function */struct sm3_block_state {	u32 h[SM3_DIGEST_SIZE / 4];}; /** * struct sm3_ctx - Context for hashing a message with SM3 * @state: the compression function state * @bytecount: number of bytes processed so far * @buf: partial block buffer; bytecount % SM3_BLOCK_SIZE bytes are valid */struct sm3_ctx {	struct sm3_block_state state;	u64 bytecount;	u8 buf[SM3_BLOCK_SIZE] __aligned(__alignof__(__be64));}; /** * sm3_init() - Initialize an SM3 context for a new message * @ctx: the context to initialize * * If you don't need incremental computation, consider sm3() instead. * * Context: Any context. */void sm3_init(struct sm3_ctx *ctx); /** * sm3_update() - Update an SM3 context with message data * @ctx: the context to update; must have been initialized * @data: the message data * @len: the data length in bytes * * This can be called any number of times. * * Context: Any context. */void sm3_update(struct sm3_ctx *ctx, const u8 *data, size_t len); /** * sm3_final() - Finish computing an SM3 message digest * @ctx: the context to finalize; must have been initialized * @out: (output) the resulting SM3 message digest * * After finishing, this zeroizes @ctx.  So the caller does not need to do it. * * Context: Any context. */void sm3_final(struct sm3_ctx *ctx, u8 out[at_least SM3_DIGEST_SIZE]); /** * sm3() - Compute SM3 message digest in one shot * @data: the message data * @len: the data length in bytes * @out: (output) the resulting SM3 message digest * * Context: Any context. */void sm3(const u8 *data, size_t len, u8 out[at_least SM3_DIGEST_SIZE]); #endif /* _CRYPTO_SM3_H */