crypto: sm3,sm4 - move into crypto directory

The lib/crypto libraries live in lib because they are used by various
drivers of the kernel. In contrast, the various helper functions in
crypto are there because they're used exclusively by the crypto API. The
SM3 and SM4 helper functions were erroniously moved into lib/crypto/
instead of crypto/, even though there are no in-kernel users outside of
the crypto API of those functions. This commit moves them into crypto/.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

4 files changed, 0 insertions, 434 deletions

diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index 379a66d7f504..9856e291f414 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -123,10 +123,4 @@ config CRYPTO_LIB_CHACHA20POLY1305
 config CRYPTO_LIB_SHA256
 	tristate
 
-config CRYPTO_LIB_SM3
-	tristate
-
-config CRYPTO_LIB_SM4
-	tristate
-
 endmenu
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
index 6c872d05d1e6..26be2bbe09c5 100644
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -37,12 +37,6 @@ libpoly1305-y					+= poly1305.o
 obj-$(CONFIG_CRYPTO_LIB_SHA256)			+= libsha256.o
 libsha256-y					:= sha256.o
 
-obj-$(CONFIG_CRYPTO_LIB_SM3)			+= libsm3.o
-libsm3-y					:= sm3.o
-
-obj-$(CONFIG_CRYPTO_LIB_SM4)			+= libsm4.o
-libsm4-y					:= sm4.o
-
 ifneq ($(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS),y)
 libblake2s-y					+= blake2s-selftest.o
 libchacha20poly1305-y				+= chacha20poly1305-selftest.o
diff --git a/lib/crypto/sm3.c b/lib/crypto/sm3.c
deleted file mode 100644
index d473e358a873..000000000000
--- a/lib/crypto/sm3.c
+++ /dev/null
@@ -1,246 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and described
- * at https://datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02
- *
- * 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>
- */
-
-#include <linux/module.h>
-#include <asm/unaligned.h>
-#include <crypto/sm3.h>
-
-static const u32 ____cacheline_aligned K[64] = {
-	0x79cc4519, 0xf3988a32, 0xe7311465, 0xce6228cb,
-	0x9cc45197, 0x3988a32f, 0x7311465e, 0xe6228cbc,
-	0xcc451979, 0x988a32f3, 0x311465e7, 0x6228cbce,
-	0xc451979c, 0x88a32f39, 0x11465e73, 0x228cbce6,
-	0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c,
-	0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce,
-	0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec,
-	0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5,
-	0x7a879d8a, 0xf50f3b14, 0xea1e7629, 0xd43cec53,
-	0xa879d8a7, 0x50f3b14f, 0xa1e7629e, 0x43cec53d,
-	0x879d8a7a, 0x0f3b14f5, 0x1e7629ea, 0x3cec53d4,
-	0x79d8a7a8, 0xf3b14f50, 0xe7629ea1, 0xcec53d43,
-	0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c,
-	0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce,
-	0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec,
-	0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5
-};
-
-/*
- * Transform the message X which consists of 16 32-bit-words. See
- * GM/T 004-2012 for details.
- */
-#define R(i, a, b, c, d, e, f, g, h, t, w1, w2)			\
-	do {							\
-		ss1 = rol32((rol32((a), 12) + (e) + (t)), 7);	\
-		ss2 = ss1 ^ rol32((a), 12);			\
-		d += FF ## i(a, b, c) + ss2 + ((w1) ^ (w2));	\
-		h += GG ## i(e, f, g) + ss1 + (w1);		\
-		b = rol32((b), 9);				\
-		f = rol32((f), 19);				\
-		h = P0((h));					\
-	} while (0)
-
-#define R1(a, b, c, d, e, f, g, h, t, w1, w2) \
-	R(1, a, b, c, d, e, f, g, h, t, w1, w2)
-#define R2(a, b, c, d, e, f, g, h, t, w1, w2) \
-	R(2, a, b, c, d, e, f, g, h, t, w1, w2)
-
-#define FF1(x, y, z)  (x ^ y ^ z)
-#define FF2(x, y, z)  ((x & y) | (x & z) | (y & z))
-
-#define GG1(x, y, z)  FF1(x, y, z)
-#define GG2(x, y, z)  ((x & y) | (~x & z))
-
-/* Message expansion */
-#define P0(x) ((x) ^ rol32((x), 9) ^ rol32((x), 17))
-#define P1(x) ((x) ^ rol32((x), 15) ^ rol32((x), 23))
-#define I(i)  (W[i] = get_unaligned_be32(data + i * 4))
-#define W1(i) (W[i & 0x0f])
-#define W2(i) (W[i & 0x0f] =				\
-		P1(W[i & 0x0f]				\
-			^ W[(i-9) & 0x0f]		\
-			^ rol32(W[(i-3) & 0x0f], 15))	\
-		^ rol32(W[(i-13) & 0x0f], 7)		\
-		^ W[(i-6) & 0x0f])
-
-static void sm3_transform(struct sm3_state *sctx, u8 const *data, u32 W[16])
-{
-	u32 a, b, c, d, e, f, g, h, ss1, ss2;
-
-	a = sctx->state[0];
-	b = sctx->state[1];
-	c = sctx->state[2];
-	d = sctx->state[3];
-	e = sctx->state[4];
-	f = sctx->state[5];
-	g = sctx->state[6];
-	h = sctx->state[7];
-
-	R1(a, b, c, d, e, f, g, h, K[0], I(0), I(4));
-	R1(d, a, b, c, h, e, f, g, K[1], I(1), I(5));
-	R1(c, d, a, b, g, h, e, f, K[2], I(2), I(6));
-	R1(b, c, d, a, f, g, h, e, K[3], I(3), I(7));
-	R1(a, b, c, d, e, f, g, h, K[4], W1(4), I(8));
-	R1(d, a, b, c, h, e, f, g, K[5], W1(5), I(9));
-	R1(c, d, a, b, g, h, e, f, K[6], W1(6), I(10));
-	R1(b, c, d, a, f, g, h, e, K[7], W1(7), I(11));
-	R1(a, b, c, d, e, f, g, h, K[8], W1(8), I(12));
-	R1(d, a, b, c, h, e, f, g, K[9], W1(9), I(13));
-	R1(c, d, a, b, g, h, e, f, K[10], W1(10), I(14));
-	R1(b, c, d, a, f, g, h, e, K[11], W1(11), I(15));
-	R1(a, b, c, d, e, f, g, h, K[12], W1(12), W2(16));
-	R1(d, a, b, c, h, e, f, g, K[13], W1(13), W2(17));
-	R1(c, d, a, b, g, h, e, f, K[14], W1(14), W2(18));
-	R1(b, c, d, a, f, g, h, e, K[15], W1(15), W2(19));
-
-	R2(a, b, c, d, e, f, g, h, K[16], W1(16), W2(20));
-	R2(d, a, b, c, h, e, f, g, K[17], W1(17), W2(21));
-	R2(c, d, a, b, g, h, e, f, K[18], W1(18), W2(22));
-	R2(b, c, d, a, f, g, h, e, K[19], W1(19), W2(23));
-	R2(a, b, c, d, e, f, g, h, K[20], W1(20), W2(24));
-	R2(d, a, b, c, h, e, f, g, K[21], W1(21), W2(25));
-	R2(c, d, a, b, g, h, e, f, K[22], W1(22), W2(26));
-	R2(b, c, d, a, f, g, h, e, K[23], W1(23), W2(27));
-	R2(a, b, c, d, e, f, g, h, K[24], W1(24), W2(28));
-	R2(d, a, b, c, h, e, f, g, K[25], W1(25), W2(29));
-	R2(c, d, a, b, g, h, e, f, K[26], W1(26), W2(30));
-	R2(b, c, d, a, f, g, h, e, K[27], W1(27), W2(31));
-	R2(a, b, c, d, e, f, g, h, K[28], W1(28), W2(32));
-	R2(d, a, b, c, h, e, f, g, K[29], W1(29), W2(33));
-	R2(c, d, a, b, g, h, e, f, K[30], W1(30), W2(34));
-	R2(b, c, d, a, f, g, h, e, K[31], W1(31), W2(35));
-
-	R2(a, b, c, d, e, f, g, h, K[32], W1(32), W2(36));
-	R2(d, a, b, c, h, e, f, g, K[33], W1(33), W2(37));
-	R2(c, d, a, b, g, h, e, f, K[34], W1(34), W2(38));
-	R2(b, c, d, a, f, g, h, e, K[35], W1(35), W2(39));
-	R2(a, b, c, d, e, f, g, h, K[36], W1(36), W2(40));
-	R2(d, a, b, c, h, e, f, g, K[37], W1(37), W2(41));
-	R2(c, d, a, b, g, h, e, f, K[38], W1(38), W2(42));
-	R2(b, c, d, a, f, g, h, e, K[39], W1(39), W2(43));
-	R2(a, b, c, d, e, f, g, h, K[40], W1(40), W2(44));
-	R2(d, a, b, c, h, e, f, g, K[41], W1(41), W2(45));
-	R2(c, d, a, b, g, h, e, f, K[42], W1(42), W2(46));
-	R2(b, c, d, a, f, g, h, e, K[43], W1(43), W2(47));
-	R2(a, b, c, d, e, f, g, h, K[44], W1(44), W2(48));
-	R2(d, a, b, c, h, e, f, g, K[45], W1(45), W2(49));
-	R2(c, d, a, b, g, h, e, f, K[46], W1(46), W2(50));
-	R2(b, c, d, a, f, g, h, e, K[47], W1(47), W2(51));
-
-	R2(a, b, c, d, e, f, g, h, K[48], W1(48), W2(52));
-	R2(d, a, b, c, h, e, f, g, K[49], W1(49), W2(53));
-	R2(c, d, a, b, g, h, e, f, K[50], W1(50), W2(54));
-	R2(b, c, d, a, f, g, h, e, K[51], W1(51), W2(55));
-	R2(a, b, c, d, e, f, g, h, K[52], W1(52), W2(56));
-	R2(d, a, b, c, h, e, f, g, K[53], W1(53), W2(57));
-	R2(c, d, a, b, g, h, e, f, K[54], W1(54), W2(58));
-	R2(b, c, d, a, f, g, h, e, K[55], W1(55), W2(59));
-	R2(a, b, c, d, e, f, g, h, K[56], W1(56), W2(60));
-	R2(d, a, b, c, h, e, f, g, K[57], W1(57), W2(61));
-	R2(c, d, a, b, g, h, e, f, K[58], W1(58), W2(62));
-	R2(b, c, d, a, f, g, h, e, K[59], W1(59), W2(63));
-	R2(a, b, c, d, e, f, g, h, K[60], W1(60), W2(64));
-	R2(d, a, b, c, h, e, f, g, K[61], W1(61), W2(65));
-	R2(c, d, a, b, g, h, e, f, K[62], W1(62), W2(66));
-	R2(b, c, d, a, f, g, h, e, K[63], W1(63), W2(67));
-
-	sctx->state[0] ^= a;
-	sctx->state[1] ^= b;
-	sctx->state[2] ^= c;
-	sctx->state[3] ^= d;
-	sctx->state[4] ^= e;
-	sctx->state[5] ^= f;
-	sctx->state[6] ^= g;
-	sctx->state[7] ^= h;
-}
-#undef R
-#undef R1
-#undef R2
-#undef I
-#undef W1
-#undef W2
-
-static inline void sm3_block(struct sm3_state *sctx,
-		u8 const *data, int blocks, u32 W[16])
-{
-	while (blocks--) {
-		sm3_transform(sctx, data, W);
-		data += SM3_BLOCK_SIZE;
-	}
-}
-
-void sm3_update(struct sm3_state *sctx, const u8 *data, unsigned int len)
-{
-	unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
-	u32 W[16];
-
-	sctx->count += len;
-
-	if ((partial + len) >= SM3_BLOCK_SIZE) {
-		int blocks;
-
-		if (partial) {
-			int p = SM3_BLOCK_SIZE - partial;
-
-			memcpy(sctx->buffer + partial, data, p);
-			data += p;
-			len -= p;
-
-			sm3_block(sctx, sctx->buffer, 1, W);
-		}
-
-		blocks = len / SM3_BLOCK_SIZE;
-		len %= SM3_BLOCK_SIZE;
-
-		if (blocks) {
-			sm3_block(sctx, data, blocks, W);
-			data += blocks * SM3_BLOCK_SIZE;
-		}
-
-		memzero_explicit(W, sizeof(W));
-
-		partial = 0;
-	}
-	if (len)
-		memcpy(sctx->buffer + partial, data, len);
-}
-EXPORT_SYMBOL_GPL(sm3_update);
-
-void sm3_final(struct sm3_state *sctx, u8 *out)
-{
-	const int bit_offset = SM3_BLOCK_SIZE - sizeof(u64);
-	__be64 *bits = (__be64 *)(sctx->buffer + bit_offset);
-	__be32 *digest = (__be32 *)out;
-	unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
-	u32 W[16];
-	int i;
-
-	sctx->buffer[partial++] = 0x80;
-	if (partial > bit_offset) {
-		memset(sctx->buffer + partial, 0, SM3_BLOCK_SIZE - partial);
-		partial = 0;
-
-		sm3_block(sctx, sctx->buffer, 1, W);
-	}
-
-	memset(sctx->buffer + partial, 0, bit_offset - partial);
-	*bits = cpu_to_be64(sctx->count << 3);
-	sm3_block(sctx, sctx->buffer, 1, W);
-
-	for (i = 0; i < 8; i++)
-		put_unaligned_be32(sctx->state[i], digest++);
-
-	/* Zeroize sensitive information. */
-	memzero_explicit(W, sizeof(W));
-	memzero_explicit(sctx, sizeof(*sctx));
-}
-EXPORT_SYMBOL_GPL(sm3_final);
-
-MODULE_DESCRIPTION("Generic SM3 library");
-MODULE_LICENSE("GPL v2");
diff --git a/lib/crypto/sm4.c b/lib/crypto/sm4.c
deleted file mode 100644
index 284e62576d0c..000000000000
--- a/lib/crypto/sm4.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * SM4, as specified in
- * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html
- *
- * Copyright (C) 2018 ARM Limited or its affiliates.
- * Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
- */
-
-#include <linux/module.h>
-#include <asm/unaligned.h>
-#include <crypto/sm4.h>
-
-static const u32 fk[4] = {
-	0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc
-};
-
-static const u32 ____cacheline_aligned ck[32] = {
-	0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
-	0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
-	0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
-	0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
-	0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
-	0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
-	0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
-	0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
-};
-
-static const u8 ____cacheline_aligned sbox[256] = {
-	0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7,
-	0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
-	0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3,
-	0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
-	0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a,
-	0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
-	0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95,
-	0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
-	0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba,
-	0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
-	0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b,
-	0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
-	0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2,
-	0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
-	0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52,
-	0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
-	0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5,
-	0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
-	0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
-	0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
-	0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60,
-	0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
-	0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f,
-	0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
-	0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f,
-	0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
-	0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd,
-	0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
-	0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e,
-	0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
-	0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20,
-	0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
-};
-
-static inline u32 sm4_t_non_lin_sub(u32 x)
-{
-	u32 out;
-
-	out  = (u32)sbox[x & 0xff];
-	out |= (u32)sbox[(x >> 8) & 0xff] << 8;
-	out |= (u32)sbox[(x >> 16) & 0xff] << 16;
-	out |= (u32)sbox[(x >> 24) & 0xff] << 24;
-
-	return out;
-}
-
-static inline u32 sm4_key_lin_sub(u32 x)
-{
-	return x ^ rol32(x, 13) ^ rol32(x, 23);
-}
-
-static inline u32 sm4_enc_lin_sub(u32 x)
-{
-	return x ^ rol32(x, 2) ^ rol32(x, 10) ^ rol32(x, 18) ^ rol32(x, 24);
-}
-
-static inline u32 sm4_key_sub(u32 x)
-{
-	return sm4_key_lin_sub(sm4_t_non_lin_sub(x));
-}
-
-static inline u32 sm4_enc_sub(u32 x)
-{
-	return sm4_enc_lin_sub(sm4_t_non_lin_sub(x));
-}
-
-static inline u32 sm4_round(u32 x0, u32 x1, u32 x2, u32 x3, u32 rk)
-{
-	return x0 ^ sm4_enc_sub(x1 ^ x2 ^ x3 ^ rk);
-}
-
-
-/**
- * sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016
- * @ctx:	The location where the computed key will be stored.
- * @in_key:	The supplied key.
- * @key_len:	The length of the supplied key.
- *
- * Returns 0 on success. The function fails only if an invalid key size (or
- * pointer) is supplied.
- */
-int sm4_expandkey(struct sm4_ctx *ctx, const u8 *in_key,
-			  unsigned int key_len)
-{
-	u32 rk[4];
-	const u32 *key = (u32 *)in_key;
-	int i;
-
-	if (key_len != SM4_KEY_SIZE)
-		return -EINVAL;
-
-	rk[0] = get_unaligned_be32(&key[0]) ^ fk[0];
-	rk[1] = get_unaligned_be32(&key[1]) ^ fk[1];
-	rk[2] = get_unaligned_be32(&key[2]) ^ fk[2];
-	rk[3] = get_unaligned_be32(&key[3]) ^ fk[3];
-
-	for (i = 0; i < 32; i += 4) {
-		rk[0] ^= sm4_key_sub(rk[1] ^ rk[2] ^ rk[3] ^ ck[i + 0]);
-		rk[1] ^= sm4_key_sub(rk[2] ^ rk[3] ^ rk[0] ^ ck[i + 1]);
-		rk[2] ^= sm4_key_sub(rk[3] ^ rk[0] ^ rk[1] ^ ck[i + 2]);
-		rk[3] ^= sm4_key_sub(rk[0] ^ rk[1] ^ rk[2] ^ ck[i + 3]);
-
-		ctx->rkey_enc[i + 0] = rk[0];
-		ctx->rkey_enc[i + 1] = rk[1];
-		ctx->rkey_enc[i + 2] = rk[2];
-		ctx->rkey_enc[i + 3] = rk[3];
-		ctx->rkey_dec[31 - 0 - i] = rk[0];
-		ctx->rkey_dec[31 - 1 - i] = rk[1];
-		ctx->rkey_dec[31 - 2 - i] = rk[2];
-		ctx->rkey_dec[31 - 3 - i] = rk[3];
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(sm4_expandkey);
-
-/**
- * sm4_crypt_block - Encrypt or decrypt a single SM4 block
- * @rk:		The rkey_enc for encrypt or rkey_dec for decrypt
- * @out:	Buffer to store output data
- * @in: 	Buffer containing the input data
- */
-void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in)
-{
-	u32 x[4], i;
-
-	x[0] = get_unaligned_be32(in + 0 * 4);
-	x[1] = get_unaligned_be32(in + 1 * 4);
-	x[2] = get_unaligned_be32(in + 2 * 4);
-	x[3] = get_unaligned_be32(in + 3 * 4);
-
-	for (i = 0; i < 32; i += 4) {
-		x[0] = sm4_round(x[0], x[1], x[2], x[3], rk[i + 0]);
-		x[1] = sm4_round(x[1], x[2], x[3], x[0], rk[i + 1]);
-		x[2] = sm4_round(x[2], x[3], x[0], x[1], rk[i + 2]);
-		x[3] = sm4_round(x[3], x[0], x[1], x[2], rk[i + 3]);
-	}
-
-	put_unaligned_be32(x[3 - 0], out + 0 * 4);
-	put_unaligned_be32(x[3 - 1], out + 1 * 4);
-	put_unaligned_be32(x[3 - 2], out + 2 * 4);
-	put_unaligned_be32(x[3 - 3], out + 3 * 4);
-}
-EXPORT_SYMBOL_GPL(sm4_crypt_block);
-
-MODULE_DESCRIPTION("Generic SM4 library");
-MODULE_LICENSE("GPL v2");