1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * SM3 hash algorithm 4 * 5 * Copyright (C) 2017 ARM Limited or its affiliates. 6 * Copyright (C) 2017 Gilad Ben-Yossef <gilad@benyossef.com> 7 * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> 8 */ 9 10 #ifndef _CRYPTO_SM3_H 11 #define _CRYPTO_SM3_H 12 13 #include <linux/types.h> 14 15 #define SM3_DIGEST_SIZE 32 16 #define SM3_BLOCK_SIZE 64 17 #define SM3_STATE_SIZE 40 18 19 #define SM3_IVA 0x7380166f 20 #define SM3_IVB 0x4914b2b9 21 #define SM3_IVC 0x172442d7 22 #define SM3_IVD 0xda8a0600 23 #define SM3_IVE 0xa96f30bc 24 #define SM3_IVF 0x163138aa 25 #define SM3_IVG 0xe38dee4d 26 #define SM3_IVH 0xb0fb0e4e 27 28 struct sm3_state { 29 u32 state[SM3_DIGEST_SIZE / 4]; 30 u64 count; 31 u8 buffer[SM3_BLOCK_SIZE]; 32 }; 33 34 void sm3_block_generic(struct sm3_state *sctx, u8 const *data, int blocks); 35 36 /* State for the SM3 compression function */ 37 struct sm3_block_state { 38 u32 h[SM3_DIGEST_SIZE / 4]; 39 }; 40 41 /** 42 * struct sm3_ctx - Context for hashing a message with SM3 43 * @state: the compression function state 44 * @bytecount: number of bytes processed so far 45 * @buf: partial block buffer; bytecount % SM3_BLOCK_SIZE bytes are valid 46 */ 47 struct sm3_ctx { 48 struct sm3_block_state state; 49 u64 bytecount; 50 u8 buf[SM3_BLOCK_SIZE] __aligned(__alignof__(__be64)); 51 }; 52 53 /** 54 * sm3_init() - Initialize an SM3 context for a new message 55 * @ctx: the context to initialize 56 * 57 * If you don't need incremental computation, consider sm3() instead. 58 * 59 * Context: Any context. 60 */ 61 void sm3_init(struct sm3_ctx *ctx); 62 63 /** 64 * sm3_update() - Update an SM3 context with message data 65 * @ctx: the context to update; must have been initialized 66 * @data: the message data 67 * @len: the data length in bytes 68 * 69 * This can be called any number of times. 70 * 71 * Context: Any context. 72 */ 73 void sm3_update(struct sm3_ctx *ctx, const u8 *data, size_t len); 74 75 /** 76 * sm3_final() - Finish computing an SM3 message digest 77 * @ctx: the context to finalize; must have been initialized 78 * @out: (output) the resulting SM3 message digest 79 * 80 * After finishing, this zeroizes @ctx. So the caller does not need to do it. 81 * 82 * Context: Any context. 83 */ 84 void sm3_final(struct sm3_ctx *ctx, u8 out[at_least SM3_DIGEST_SIZE]); 85 86 /** 87 * sm3() - Compute SM3 message digest in one shot 88 * @data: the message data 89 * @len: the data length in bytes 90 * @out: (output) the resulting SM3 message digest 91 * 92 * Context: Any context. 93 */ 94 void sm3(const u8 *data, size_t len, u8 out[at_least SM3_DIGEST_SIZE]); 95 96 #endif /* _CRYPTO_SM3_H */ 97