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crypto: sm3 - add OSCCA SM3 secure hash
Add OSCCA SM3 secure hash (OSCCA GM/T 0004-2012 SM3) generic hash transformation. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef
Herbert Xu
parent
1c9fa294fe
commit
4f0fc1600e
@ -859,6 +859,17 @@ config CRYPTO_SHA3
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References:
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http://keccak.noekeon.org/
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config CRYPTO_SM3
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tristate "SM3 digest algorithm"
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select CRYPTO_HASH
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help
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SM3 secure hash function as defined by OSCCA GM/T 0004-2012 SM3).
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It is part of the Chinese Commercial Cryptography suite.
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References:
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http://www.oscca.gov.cn/UpFile/20101222141857786.pdf
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https://datatracker.ietf.org/doc/html/draft-shen-sm3-hash
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config CRYPTO_TGR192
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tristate "Tiger digest algorithms"
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select CRYPTO_HASH
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@ -70,6 +70,7 @@ obj-$(CONFIG_CRYPTO_SHA1) += sha1_generic.o
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obj-$(CONFIG_CRYPTO_SHA256) += sha256_generic.o
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obj-$(CONFIG_CRYPTO_SHA512) += sha512_generic.o
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obj-$(CONFIG_CRYPTO_SHA3) += sha3_generic.o
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obj-$(CONFIG_CRYPTO_SM3) += sm3_generic.o
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obj-$(CONFIG_CRYPTO_WP512) += wp512.o
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CFLAGS_wp512.o := $(call cc-option,-fno-schedule-insns) # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79149
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obj-$(CONFIG_CRYPTO_TGR192) += tgr192.o
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210
crypto/sm3_generic.c
Normal file
210
crypto/sm3_generic.c
Normal file
@ -0,0 +1,210 @@
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/*
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* SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
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* described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/types.h>
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#include <crypto/sm3.h>
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#include <crypto/sm3_base.h>
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#include <linux/bitops.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
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0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
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0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
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0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
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0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
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};
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EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
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static inline u32 p0(u32 x)
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{
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return x ^ rol32(x, 9) ^ rol32(x, 17);
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}
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static inline u32 p1(u32 x)
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{
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return x ^ rol32(x, 15) ^ rol32(x, 23);
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}
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static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)
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{
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return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));
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}
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static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)
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{
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return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));
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}
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static inline u32 t(unsigned int n)
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{
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return (n < 16) ? SM3_T1 : SM3_T2;
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}
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static void sm3_expand(u32 *t, u32 *w, u32 *wt)
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{
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int i;
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unsigned int tmp;
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/* load the input */
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for (i = 0; i <= 15; i++)
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w[i] = get_unaligned_be32((__u32 *)t + i);
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for (i = 16; i <= 67; i++) {
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tmp = w[i - 16] ^ w[i - 9] ^ rol32(w[i - 3], 15);
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w[i] = p1(tmp) ^ (rol32(w[i - 13], 7)) ^ w[i - 6];
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}
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for (i = 0; i <= 63; i++)
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wt[i] = w[i] ^ w[i + 4];
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}
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static void sm3_compress(u32 *w, u32 *wt, u32 *m)
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{
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u32 ss1;
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u32 ss2;
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u32 tt1;
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u32 tt2;
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u32 a, b, c, d, e, f, g, h;
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int i;
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a = m[0];
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b = m[1];
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c = m[2];
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d = m[3];
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e = m[4];
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f = m[5];
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g = m[6];
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h = m[7];
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for (i = 0; i <= 63; i++) {
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ss1 = rol32((rol32(a, 12) + e + rol32(t(i), i)), 7);
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ss2 = ss1 ^ rol32(a, 12);
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tt1 = ff(i, a, b, c) + d + ss2 + *wt;
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wt++;
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tt2 = gg(i, e, f, g) + h + ss1 + *w;
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w++;
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d = c;
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c = rol32(b, 9);
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b = a;
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a = tt1;
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h = g;
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g = rol32(f, 19);
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f = e;
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e = p0(tt2);
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}
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m[0] = a ^ m[0];
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m[1] = b ^ m[1];
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m[2] = c ^ m[2];
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m[3] = d ^ m[3];
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m[4] = e ^ m[4];
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m[5] = f ^ m[5];
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m[6] = g ^ m[6];
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m[7] = h ^ m[7];
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a = b = c = d = e = f = g = h = ss1 = ss2 = tt1 = tt2 = 0;
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}
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static void sm3_transform(struct sm3_state *sst, u8 const *src)
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{
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unsigned int w[68];
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unsigned int wt[64];
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sm3_expand((u32 *)src, w, wt);
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sm3_compress(w, wt, sst->state);
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memzero_explicit(w, sizeof(w));
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memzero_explicit(wt, sizeof(wt));
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}
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static void sm3_generic_block_fn(struct sm3_state *sst, u8 const *src,
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int blocks)
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{
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while (blocks--) {
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sm3_transform(sst, src);
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src += SM3_BLOCK_SIZE;
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}
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}
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int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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return sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
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}
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EXPORT_SYMBOL(crypto_sm3_update);
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static int sm3_final(struct shash_desc *desc, u8 *out)
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{
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sm3_base_do_finalize(desc, sm3_generic_block_fn);
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return sm3_base_finish(desc, out);
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}
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int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *hash)
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{
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sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
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return sm3_final(desc, hash);
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}
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EXPORT_SYMBOL(crypto_sm3_finup);
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static struct shash_alg sm3_alg = {
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.digestsize = SM3_DIGEST_SIZE,
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.init = sm3_base_init,
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.update = crypto_sm3_update,
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.final = sm3_final,
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.finup = crypto_sm3_finup,
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.descsize = sizeof(struct sm3_state),
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.base = {
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.cra_name = "sm3",
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.cra_driver_name = "sm3-generic",
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SM3_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int __init sm3_generic_mod_init(void)
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{
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return crypto_register_shash(&sm3_alg);
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}
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static void __exit sm3_generic_mod_fini(void)
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{
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crypto_unregister_shash(&sm3_alg);
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}
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module_init(sm3_generic_mod_init);
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module_exit(sm3_generic_mod_fini);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
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MODULE_ALIAS_CRYPTO("sm3");
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MODULE_ALIAS_CRYPTO("sm3-generic");
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40
include/crypto/sm3.h
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40
include/crypto/sm3.h
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@ -0,0 +1,40 @@
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/*
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* Common values for SM3 algorithm
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*/
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#ifndef _CRYPTO_SM3_H
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#define _CRYPTO_SM3_H
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#include <linux/types.h>
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#define SM3_DIGEST_SIZE 32
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#define SM3_BLOCK_SIZE 64
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#define SM3_T1 0x79CC4519
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#define SM3_T2 0x7A879D8A
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#define SM3_IVA 0x7380166f
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#define SM3_IVB 0x4914b2b9
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#define SM3_IVC 0x172442d7
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#define SM3_IVD 0xda8a0600
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#define SM3_IVE 0xa96f30bc
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#define SM3_IVF 0x163138aa
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#define SM3_IVG 0xe38dee4d
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#define SM3_IVH 0xb0fb0e4e
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extern const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE];
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struct sm3_state {
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u32 state[SM3_DIGEST_SIZE / 4];
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u64 count;
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u8 buffer[SM3_BLOCK_SIZE];
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};
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struct shash_desc;
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extern int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
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unsigned int len);
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extern int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *hash);
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#endif
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117
include/crypto/sm3_base.h
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117
include/crypto/sm3_base.h
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@ -0,0 +1,117 @@
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <crypto/internal/hash.h>
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#include <crypto/sm3.h>
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#include <linux/crypto.h>
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#include <linux/module.h>
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#include <asm/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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struct sm3_state *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SM3_IVA;
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sctx->state[1] = SM3_IVB;
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sctx->state[2] = SM3_IVC;
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sctx->state[3] = SM3_IVD;
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sctx->state[4] = SM3_IVE;
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sctx->state[5] = SM3_IVF;
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sctx->state[6] = SM3_IVG;
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sctx->state[7] = SM3_IVH;
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sctx->count = 0;
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return 0;
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}
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static inline int sm3_base_do_update(struct shash_desc *desc,
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const u8 *data,
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unsigned int len,
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sm3_block_fn *block_fn)
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{
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struct sm3_state *sctx = shash_desc_ctx(desc);
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unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
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sctx->count += len;
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if (unlikely((partial + len) >= SM3_BLOCK_SIZE)) {
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int blocks;
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if (partial) {
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int p = SM3_BLOCK_SIZE - partial;
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memcpy(sctx->buffer + partial, data, p);
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data += p;
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len -= p;
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block_fn(sctx, sctx->buffer, 1);
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}
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blocks = len / SM3_BLOCK_SIZE;
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len %= SM3_BLOCK_SIZE;
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if (blocks) {
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block_fn(sctx, data, blocks);
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data += blocks * SM3_BLOCK_SIZE;
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}
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partial = 0;
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}
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if (len)
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memcpy(sctx->buffer + partial, data, len);
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return 0;
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}
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static inline int sm3_base_do_finalize(struct shash_desc *desc,
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sm3_block_fn *block_fn)
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{
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const int bit_offset = SM3_BLOCK_SIZE - sizeof(__be64);
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struct sm3_state *sctx = shash_desc_ctx(desc);
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__be64 *bits = (__be64 *)(sctx->buffer + bit_offset);
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unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
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sctx->buffer[partial++] = 0x80;
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if (partial > bit_offset) {
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memset(sctx->buffer + partial, 0x0, SM3_BLOCK_SIZE - partial);
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partial = 0;
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block_fn(sctx, sctx->buffer, 1);
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}
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memset(sctx->buffer + partial, 0x0, bit_offset - partial);
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*bits = cpu_to_be64(sctx->count << 3);
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block_fn(sctx, sctx->buffer, 1);
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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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*sctx = (struct sm3_state){};
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return 0;
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}
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