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| author | Tianjia Zhang <tianjia.zhang@linux.alibaba.com> | 2022-01-07 20:06:55 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-01-28 16:51:10 +1100 |
| commit | eb90686d5d10fef9cadd9c0eb30f3fee66d2b2a5 (patch) | |
| tree | cde8ab5fdcd6712014a4d2e869210825bebc3b83 /include/crypto | |
| parent | 68ce6126e11364dd5b3a5c5113b4285c56d8d249 (diff) | |
| download | lwn-eb90686d5d10fef9cadd9c0eb30f3fee66d2b2a5.tar.gz lwn-eb90686d5d10fef9cadd9c0eb30f3fee66d2b2a5.zip | |
crypto: sm3 - create SM3 stand-alone library
Stand-alone implementation of the SM3 algorithm. It is designed
to have as little dependencies as possible. In other cases you
should generally use the hash APIs from include/crypto/hash.h.
Especially when hashing large amounts of data as those APIs may
be hw-accelerated. In the new SM3 stand-alone library,
sm3_transform() has also been optimized, instead of simply using
the code in sm3_generic.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Reviewed-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/sm3.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/crypto/sm3.h b/include/crypto/sm3.h index 42ea21289ba9..b5fb6d1bf247 100644 --- a/include/crypto/sm3.h +++ b/include/crypto/sm3.h @@ -1,5 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Common values for SM3 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 @@ -39,4 +44,31 @@ extern int crypto_sm3_final(struct shash_desc *desc, u8 *out); extern int crypto_sm3_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *hash); + +/* + * Stand-alone implementation of the SM3 algorithm. It is designed to + * have as little dependencies as possible so it can be used in the + * kexec_file purgatory. In other cases you should generally use the + * hash APIs from include/crypto/hash.h. Especially when hashing large + * amounts of data as those APIs may be hw-accelerated. + * + * For details see lib/crypto/sm3.c + */ + +static inline void sm3_init(struct sm3_state *sctx) +{ + sctx->state[0] = SM3_IVA; + sctx->state[1] = SM3_IVB; + sctx->state[2] = SM3_IVC; + sctx->state[3] = SM3_IVD; + sctx->state[4] = SM3_IVE; + sctx->state[5] = SM3_IVF; + sctx->state[6] = SM3_IVG; + sctx->state[7] = SM3_IVH; + sctx->count = 0; +} + +void sm3_update(struct sm3_state *sctx, const u8 *data, unsigned int len); +void sm3_final(struct sm3_state *sctx, u8 *out); + #endif |