From: Tianjia Zhang tianjia.zhang@linux.alibaba.com
mainline inclusion from mainline-v5.19-rc1 commit 4f1aef9b806f58ef76fdac0b4d9cfab6e66aeef1 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I50ABL CVE: NA
Reference: https://patchwork.kernel.org/project/linux-crypto/patch/20220315094454.45269...
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This adds ARMv8 NEON implementations of SM4 in ECB, CBC, CFB and CTR modes. This implementation uses the plain NEON instruction set, All S-BOX substitutions uses the tbl/tbx instructions of ARMv8, combined with the out-of-order execution in CPU, this optimization supports encryption of up to 8 blocks at the same time.
The performance of encrypting one block is not as good as software implementation, so the encryption operations of CBC and CFB still use pure software algorithms.
Benchmark on T-Head Yitian-710 2.75 GHz, the data comes from the 218 mode of tcrypt. The abscissas are blocks of different lengths. The data is tabulated and the unit is Mb/s:
sm4-generic | 16 64 128 256 1024 1420 4096 ECB enc | 80.05 91.42 93.66 94.77 95.69 95.77 95.86 ECB dec | 79.98 91.41 93.64 94.76 95.66 95.77 95.85 CBC enc | 78.55 86.50 88.02 88.77 89.36 89.42 89.48 CBC dec | 76.82 89.06 91.52 92.77 93.75 93.83 93.96 CFB enc | 77.64 86.13 87.62 88.42 89.08 88.83 89.18 CFB dec | 77.57 88.34 90.36 91.45 92.34 92.00 92.44 CTR enc | 77.80 88.28 90.23 91.22 92.11 91.81 92.25 CTR dec | 77.83 88.22 90.22 91.22 92.04 91.82 92.28 sm4-neon ECB enc | 28.31 112.77 203.03 209.89 215.49 202.11 210.59 ECB dec | 28.36 113.45 203.23 210.00 215.52 202.13 210.65 CBC enc | 79.32 87.02 88.51 89.28 89.85 89.89 89.97 CBC dec | 28.29 112.20 203.30 209.82 214.99 201.51 209.95 CFB enc | 79.59 87.16 88.54 89.30 89.83 89.62 89.92 CFB dec | 28.12 111.05 202.47 209.02 214.21 210.90 209.12 CTR enc | 28.04 108.81 200.62 206.65 211.78 208.78 206.74 CTR dec | 28.02 108.82 200.45 206.62 211.78 208.74 206.70
Signed-off-by: Tianjia Zhang tianjia.zhang@linux.alibaba.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: GUO Zihua guozihua@huawei.com Reviewed-by: Wang Weiyang wangweiyang2@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- arch/arm64/crypto/Kconfig | 6 + arch/arm64/crypto/Makefile | 3 + arch/arm64/crypto/sm4-neon-core.S | 487 ++++++++++++++++++++++++++++++ arch/arm64/crypto/sm4-neon-glue.c | 442 +++++++++++++++++++++++++++ 4 files changed, 938 insertions(+) create mode 100644 arch/arm64/crypto/sm4-neon-core.S create mode 100644 arch/arm64/crypto/sm4-neon-glue.c
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig index b8eb0453123d..84aa0c3ab997 100644 --- a/arch/arm64/crypto/Kconfig +++ b/arch/arm64/crypto/Kconfig @@ -53,6 +53,12 @@ config CRYPTO_SM4_ARM64_CE select CRYPTO_ALGAPI select CRYPTO_SM4
+config CRYPTO_SM4_ARM64_NEON_BLK + tristate "SM4 in ECB/CBC/CFB/CTR modes using NEON instructions" + depends on KERNEL_MODE_NEON + select CRYPTO_SKCIPHER + select CRYPTO_LIB_SM4 + config CRYPTO_GHASH_ARM64_CE tristate "GHASH/AES-GCM using ARMv8 Crypto Extensions" depends on KERNEL_MODE_NEON diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile index 8c731449285b..fe3701123455 100644 --- a/arch/arm64/crypto/Makefile +++ b/arch/arm64/crypto/Makefile @@ -23,6 +23,9 @@ sm3-ce-y := sm3-ce-glue.o sm3-ce-core.o obj-$(CONFIG_CRYPTO_SM4_ARM64_CE) += sm4-ce-cipher.o sm4-ce-cipher-y := sm4-ce-cipher-glue.o sm4-ce-cipher-core.o
+obj-$(CONFIG_CRYPTO_SM4_ARM64_NEON_BLK) += sm4-neon.o +sm4-neon-y := sm4-neon-glue.o sm4-neon-core.o + obj-$(CONFIG_CRYPTO_GHASH_ARM64_CE) += ghash-ce.o ghash-ce-y := ghash-ce-glue.o ghash-ce-core.o
diff --git a/arch/arm64/crypto/sm4-neon-core.S b/arch/arm64/crypto/sm4-neon-core.S new file mode 100644 index 000000000000..3d5256b354d2 --- /dev/null +++ b/arch/arm64/crypto/sm4-neon-core.S @@ -0,0 +1,487 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SM4 Cipher Algorithm for ARMv8 NEON + * as specified in + * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html + * + * Copyright (C) 2022, Alibaba Group. + * Copyright (C) 2022 Tianjia Zhang tianjia.zhang@linux.alibaba.com + */ + +#include <linux/linkage.h> +#include <asm/assembler.h> + +/* Register macros */ + +#define RTMP0 v8 +#define RTMP1 v9 +#define RTMP2 v10 +#define RTMP3 v11 + +#define RX0 v12 +#define RX1 v13 +#define RKEY v14 +#define RIV v15 + +/* Helper macros. */ + +#define PREPARE \ + adr_l x5, crypto_sm4_sbox; \ + ld1 {v16.16b-v19.16b}, [x5], #64; \ + ld1 {v20.16b-v23.16b}, [x5], #64; \ + ld1 {v24.16b-v27.16b}, [x5], #64; \ + ld1 {v28.16b-v31.16b}, [x5]; + +#define transpose_4x4(s0, s1, s2, s3) \ + zip1 RTMP0.4s, s0.4s, s1.4s; \ + zip1 RTMP1.4s, s2.4s, s3.4s; \ + zip2 RTMP2.4s, s0.4s, s1.4s; \ + zip2 RTMP3.4s, s2.4s, s3.4s; \ + zip1 s0.2d, RTMP0.2d, RTMP1.2d; \ + zip2 s1.2d, RTMP0.2d, RTMP1.2d; \ + zip1 s2.2d, RTMP2.2d, RTMP3.2d; \ + zip2 s3.2d, RTMP2.2d, RTMP3.2d; + +#define rotate_clockwise_90(s0, s1, s2, s3) \ + zip1 RTMP0.4s, s1.4s, s0.4s; \ + zip2 RTMP1.4s, s1.4s, s0.4s; \ + zip1 RTMP2.4s, s3.4s, s2.4s; \ + zip2 RTMP3.4s, s3.4s, s2.4s; \ + zip1 s0.2d, RTMP2.2d, RTMP0.2d; \ + zip2 s1.2d, RTMP2.2d, RTMP0.2d; \ + zip1 s2.2d, RTMP3.2d, RTMP1.2d; \ + zip2 s3.2d, RTMP3.2d, RTMP1.2d; + +#define ROUND4(round, s0, s1, s2, s3) \ + dup RX0.4s, RKEY.s[round]; \ + /* rk ^ s1 ^ s2 ^ s3 */ \ + eor RTMP1.16b, s2.16b, s3.16b; \ + eor RX0.16b, RX0.16b, s1.16b; \ + eor RX0.16b, RX0.16b, RTMP1.16b; \ + \ + /* sbox, non-linear part */ \ + movi RTMP3.16b, #64; /* sizeof(sbox) / 4 */ \ + tbl RTMP0.16b, {v16.16b-v19.16b}, RX0.16b; \ + sub RX0.16b, RX0.16b, RTMP3.16b; \ + tbx RTMP0.16b, {v20.16b-v23.16b}, RX0.16b; \ + sub RX0.16b, RX0.16b, RTMP3.16b; \ + tbx RTMP0.16b, {v24.16b-v27.16b}, RX0.16b; \ + sub RX0.16b, RX0.16b, RTMP3.16b; \ + tbx RTMP0.16b, {v28.16b-v31.16b}, RX0.16b; \ + \ + /* linear part */ \ + shl RTMP1.4s, RTMP0.4s, #8; \ + shl RTMP2.4s, RTMP0.4s, #16; \ + shl RTMP3.4s, RTMP0.4s, #24; \ + sri RTMP1.4s, RTMP0.4s, #(32-8); \ + sri RTMP2.4s, RTMP0.4s, #(32-16); \ + sri RTMP3.4s, RTMP0.4s, #(32-24); \ + /* RTMP1 = x ^ rol32(x, 8) ^ rol32(x, 16) */ \ + eor RTMP1.16b, RTMP1.16b, RTMP0.16b; \ + eor RTMP1.16b, RTMP1.16b, RTMP2.16b; \ + /* RTMP3 = x ^ rol32(x, 24) ^ rol32(RTMP1, 2) */ \ + eor RTMP3.16b, RTMP3.16b, RTMP0.16b; \ + shl RTMP2.4s, RTMP1.4s, 2; \ + sri RTMP2.4s, RTMP1.4s, #(32-2); \ + eor RTMP3.16b, RTMP3.16b, RTMP2.16b; \ + /* s0 ^= RTMP3 */ \ + eor s0.16b, s0.16b, RTMP3.16b; + +#define SM4_CRYPT_BLK4(b0, b1, b2, b3) \ + rev32 b0.16b, b0.16b; \ + rev32 b1.16b, b1.16b; \ + rev32 b2.16b, b2.16b; \ + rev32 b3.16b, b3.16b; \ + \ + transpose_4x4(b0, b1, b2, b3); \ + \ + mov x6, 8; \ +4: \ + ld1 {RKEY.4s}, [x0], #16; \ + subs x6, x6, #1; \ + \ + ROUND4(0, b0, b1, b2, b3); \ + ROUND4(1, b1, b2, b3, b0); \ + ROUND4(2, b2, b3, b0, b1); \ + ROUND4(3, b3, b0, b1, b2); \ + \ + bne 4b; \ + \ + rotate_clockwise_90(b0, b1, b2, b3); \ + rev32 b0.16b, b0.16b; \ + rev32 b1.16b, b1.16b; \ + rev32 b2.16b, b2.16b; \ + rev32 b3.16b, b3.16b; \ + \ + /* repoint to rkey */ \ + sub x0, x0, #128; + +#define ROUND8(round, s0, s1, s2, s3, t0, t1, t2, t3) \ + /* rk ^ s1 ^ s2 ^ s3 */ \ + dup RX0.4s, RKEY.s[round]; \ + eor RTMP0.16b, s2.16b, s3.16b; \ + mov RX1.16b, RX0.16b; \ + eor RTMP1.16b, t2.16b, t3.16b; \ + eor RX0.16b, RX0.16b, s1.16b; \ + eor RX1.16b, RX1.16b, t1.16b; \ + eor RX0.16b, RX0.16b, RTMP0.16b; \ + eor RX1.16b, RX1.16b, RTMP1.16b; \ + \ + /* sbox, non-linear part */ \ + movi RTMP3.16b, #64; /* sizeof(sbox) / 4 */ \ + tbl RTMP0.16b, {v16.16b-v19.16b}, RX0.16b; \ + tbl RTMP1.16b, {v16.16b-v19.16b}, RX1.16b; \ + sub RX0.16b, RX0.16b, RTMP3.16b; \ + sub RX1.16b, RX1.16b, RTMP3.16b; \ + tbx RTMP0.16b, {v20.16b-v23.16b}, RX0.16b; \ + tbx RTMP1.16b, {v20.16b-v23.16b}, RX1.16b; \ + sub RX0.16b, RX0.16b, RTMP3.16b; \ + sub RX1.16b, RX1.16b, RTMP3.16b; \ + tbx RTMP0.16b, {v24.16b-v27.16b}, RX0.16b; \ + tbx RTMP1.16b, {v24.16b-v27.16b}, RX1.16b; \ + sub RX0.16b, RX0.16b, RTMP3.16b; \ + sub RX1.16b, RX1.16b, RTMP3.16b; \ + tbx RTMP0.16b, {v28.16b-v31.16b}, RX0.16b; \ + tbx RTMP1.16b, {v28.16b-v31.16b}, RX1.16b; \ + \ + /* linear part */ \ + shl RX0.4s, RTMP0.4s, #8; \ + shl RX1.4s, RTMP1.4s, #8; \ + shl RTMP2.4s, RTMP0.4s, #16; \ + shl RTMP3.4s, RTMP1.4s, #16; \ + sri RX0.4s, RTMP0.4s, #(32 - 8); \ + sri RX1.4s, RTMP1.4s, #(32 - 8); \ + sri RTMP2.4s, RTMP0.4s, #(32 - 16); \ + sri RTMP3.4s, RTMP1.4s, #(32 - 16); \ + /* RX = x ^ rol32(x, 8) ^ rol32(x, 16) */ \ + eor RX0.16b, RX0.16b, RTMP0.16b; \ + eor RX1.16b, RX1.16b, RTMP1.16b; \ + eor RX0.16b, RX0.16b, RTMP2.16b; \ + eor RX1.16b, RX1.16b, RTMP3.16b; \ + /* RTMP0/1 ^= x ^ rol32(x, 24) ^ rol32(RX, 2) */ \ + shl RTMP2.4s, RTMP0.4s, #24; \ + shl RTMP3.4s, RTMP1.4s, #24; \ + sri RTMP2.4s, RTMP0.4s, #(32 - 24); \ + sri RTMP3.4s, RTMP1.4s, #(32 - 24); \ + eor RTMP0.16b, RTMP0.16b, RTMP2.16b; \ + eor RTMP1.16b, RTMP1.16b, RTMP3.16b; \ + shl RTMP2.4s, RX0.4s, #2; \ + shl RTMP3.4s, RX1.4s, #2; \ + sri RTMP2.4s, RX0.4s, #(32 - 2); \ + sri RTMP3.4s, RX1.4s, #(32 - 2); \ + eor RTMP0.16b, RTMP0.16b, RTMP2.16b; \ + eor RTMP1.16b, RTMP1.16b, RTMP3.16b; \ + /* s0/t0 ^= RTMP0/1 */ \ + eor s0.16b, s0.16b, RTMP0.16b; \ + eor t0.16b, t0.16b, RTMP1.16b; + +#define SM4_CRYPT_BLK8(b0, b1, b2, b3, b4, b5, b6, b7) \ + rev32 b0.16b, b0.16b; \ + rev32 b1.16b, b1.16b; \ + rev32 b2.16b, b2.16b; \ + rev32 b3.16b, b3.16b; \ + rev32 b4.16b, b4.16b; \ + rev32 b5.16b, b5.16b; \ + rev32 b6.16b, b6.16b; \ + rev32 b7.16b, b7.16b; \ + \ + transpose_4x4(b0, b1, b2, b3); \ + transpose_4x4(b4, b5, b6, b7); \ + \ + mov x6, 8; \ +8: \ + ld1 {RKEY.4s}, [x0], #16; \ + subs x6, x6, #1; \ + \ + ROUND8(0, b0, b1, b2, b3, b4, b5, b6, b7); \ + ROUND8(1, b1, b2, b3, b0, b5, b6, b7, b4); \ + ROUND8(2, b2, b3, b0, b1, b6, b7, b4, b5); \ + ROUND8(3, b3, b0, b1, b2, b7, b4, b5, b6); \ + \ + bne 8b; \ + \ + rotate_clockwise_90(b0, b1, b2, b3); \ + rotate_clockwise_90(b4, b5, b6, b7); \ + rev32 b0.16b, b0.16b; \ + rev32 b1.16b, b1.16b; \ + rev32 b2.16b, b2.16b; \ + rev32 b3.16b, b3.16b; \ + rev32 b4.16b, b4.16b; \ + rev32 b5.16b, b5.16b; \ + rev32 b6.16b, b6.16b; \ + rev32 b7.16b, b7.16b; \ + \ + /* repoint to rkey */ \ + sub x0, x0, #128; + + +.align 3 +SYM_FUNC_START_LOCAL(__sm4_neon_crypt_blk1_4) + /* input: + * x0: round key array, CTX + * x1: dst + * x2: src + * w3: num blocks (1..4) + */ + PREPARE; + + ld1 {v0.16b}, [x2], #16; + mov v1.16b, v0.16b; + mov v2.16b, v0.16b; + mov v3.16b, v0.16b; + cmp w3, #2; + blt .Lblk4_load_input_done; + ld1 {v1.16b}, [x2], #16; + beq .Lblk4_load_input_done; + ld1 {v2.16b}, [x2], #16; + cmp w3, #3; + beq .Lblk4_load_input_done; + ld1 {v3.16b}, [x2]; + +.Lblk4_load_input_done: + SM4_CRYPT_BLK4(v0, v1, v2, v3); + + st1 {v0.16b}, [x1], #16; + cmp w3, #2; + blt .Lblk4_store_output_done; + st1 {v1.16b}, [x1], #16; + beq .Lblk4_store_output_done; + st1 {v2.16b}, [x1], #16; + cmp w3, #3; + beq .Lblk4_store_output_done; + st1 {v3.16b}, [x1]; + +.Lblk4_store_output_done: + ret; +SYM_FUNC_END(__sm4_neon_crypt_blk1_4) + +.align 3 +SYM_FUNC_START(sm4_neon_crypt_blk1_8) + /* input: + * x0: round key array, CTX + * x1: dst + * x2: src + * w3: num blocks (1..8) + */ + cmp w3, #5; + blt __sm4_neon_crypt_blk1_4; + + PREPARE; + + ld1 {v0.16b-v3.16b}, [x2], #64; + ld1 {v4.16b}, [x2], #16; + mov v5.16b, v4.16b; + mov v6.16b, v4.16b; + mov v7.16b, v4.16b; + beq .Lblk8_load_input_done; + ld1 {v5.16b}, [x2], #16; + cmp w3, #7; + blt .Lblk8_load_input_done; + ld1 {v6.16b}, [x2], #16; + beq .Lblk8_load_input_done; + ld1 {v7.16b}, [x2]; + +.Lblk8_load_input_done: + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + + cmp w3, #6; + st1 {v0.16b-v3.16b}, [x1], #64; + st1 {v4.16b}, [x1], #16; + blt .Lblk8_store_output_done; + st1 {v5.16b}, [x1], #16; + beq .Lblk8_store_output_done; + st1 {v6.16b}, [x1], #16; + cmp w3, #7; + beq .Lblk8_store_output_done; + st1 {v7.16b}, [x1]; + +.Lblk8_store_output_done: + ret; +SYM_FUNC_END(sm4_neon_crypt_blk1_8) + +.align 3 +SYM_FUNC_START(sm4_neon_crypt_blk8) + /* input: + * x0: round key array, CTX + * x1: dst + * x2: src + * w3: nblocks (multiples of 8) + */ + PREPARE; + +.Lcrypt_loop_blk: + subs w3, w3, #8; + bmi .Lcrypt_end; + + ld1 {v0.16b-v3.16b}, [x2], #64; + ld1 {v4.16b-v7.16b}, [x2], #64; + + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + + st1 {v0.16b-v3.16b}, [x1], #64; + st1 {v4.16b-v7.16b}, [x1], #64; + + b .Lcrypt_loop_blk; + +.Lcrypt_end: + ret; +SYM_FUNC_END(sm4_neon_crypt_blk8) + +.align 3 +SYM_FUNC_START(sm4_neon_cbc_dec_blk8) + /* input: + * x0: round key array, CTX + * x1: dst + * x2: src + * x3: iv (big endian, 128 bit) + * w4: nblocks (multiples of 8) + */ + PREPARE; + + ld1 {RIV.16b}, [x3]; + +.Lcbc_loop_blk: + subs w4, w4, #8; + bmi .Lcbc_end; + + ld1 {v0.16b-v3.16b}, [x2], #64; + ld1 {v4.16b-v7.16b}, [x2]; + + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + + sub x2, x2, #64; + eor v0.16b, v0.16b, RIV.16b; + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; + eor v1.16b, v1.16b, RTMP0.16b; + eor v2.16b, v2.16b, RTMP1.16b; + eor v3.16b, v3.16b, RTMP2.16b; + st1 {v0.16b-v3.16b}, [x1], #64; + + eor v4.16b, v4.16b, RTMP3.16b; + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; + eor v5.16b, v5.16b, RTMP0.16b; + eor v6.16b, v6.16b, RTMP1.16b; + eor v7.16b, v7.16b, RTMP2.16b; + + mov RIV.16b, RTMP3.16b; + st1 {v4.16b-v7.16b}, [x1], #64; + + b .Lcbc_loop_blk; + +.Lcbc_end: + /* store new IV */ + st1 {RIV.16b}, [x3]; + + ret; +SYM_FUNC_END(sm4_neon_cbc_dec_blk8) + +.align 3 +SYM_FUNC_START(sm4_neon_cfb_dec_blk8) + /* input: + * x0: round key array, CTX + * x1: dst + * x2: src + * x3: iv (big endian, 128 bit) + * w4: nblocks (multiples of 8) + */ + PREPARE; + + ld1 {v0.16b}, [x3]; + +.Lcfb_loop_blk: + subs w4, w4, #8; + bmi .Lcfb_end; + + ld1 {v1.16b, v2.16b, v3.16b}, [x2], #48; + ld1 {v4.16b-v7.16b}, [x2]; + + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + + sub x2, x2, #48; + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; + eor v0.16b, v0.16b, RTMP0.16b; + eor v1.16b, v1.16b, RTMP1.16b; + eor v2.16b, v2.16b, RTMP2.16b; + eor v3.16b, v3.16b, RTMP3.16b; + st1 {v0.16b-v3.16b}, [x1], #64; + + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; + eor v4.16b, v4.16b, RTMP0.16b; + eor v5.16b, v5.16b, RTMP1.16b; + eor v6.16b, v6.16b, RTMP2.16b; + eor v7.16b, v7.16b, RTMP3.16b; + st1 {v4.16b-v7.16b}, [x1], #64; + + mov v0.16b, RTMP3.16b; + + b .Lcfb_loop_blk; + +.Lcfb_end: + /* store new IV */ + st1 {v0.16b}, [x3]; + + ret; +SYM_FUNC_END(sm4_neon_cfb_dec_blk8) + +.align 3 +SYM_FUNC_START(sm4_neon_ctr_enc_blk8) + /* input: + * x0: round key array, CTX + * x1: dst + * x2: src + * x3: ctr (big endian, 128 bit) + * w4: nblocks (multiples of 8) + */ + PREPARE; + + ldp x7, x8, [x3]; + rev x7, x7; + rev x8, x8; + +.Lctr_loop_blk: + subs w4, w4, #8; + bmi .Lctr_end; + +#define inc_le128(vctr) \ + mov vctr.d[1], x8; \ + mov vctr.d[0], x7; \ + adds x8, x8, #1; \ + adc x7, x7, xzr; \ + rev64 vctr.16b, vctr.16b; + + /* construct CTRs */ + inc_le128(v0); /* +0 */ + inc_le128(v1); /* +1 */ + inc_le128(v2); /* +2 */ + inc_le128(v3); /* +3 */ + inc_le128(v4); /* +4 */ + inc_le128(v5); /* +5 */ + inc_le128(v6); /* +6 */ + inc_le128(v7); /* +7 */ + + SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7); + + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; + eor v0.16b, v0.16b, RTMP0.16b; + eor v1.16b, v1.16b, RTMP1.16b; + eor v2.16b, v2.16b, RTMP2.16b; + eor v3.16b, v3.16b, RTMP3.16b; + st1 {v0.16b-v3.16b}, [x1], #64; + + ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64; + eor v4.16b, v4.16b, RTMP0.16b; + eor v5.16b, v5.16b, RTMP1.16b; + eor v6.16b, v6.16b, RTMP2.16b; + eor v7.16b, v7.16b, RTMP3.16b; + st1 {v4.16b-v7.16b}, [x1], #64; + + b .Lctr_loop_blk; + +.Lctr_end: + /* store new CTR */ + rev x7, x7; + rev x8, x8; + stp x7, x8, [x3]; + + ret; +SYM_FUNC_END(sm4_neon_ctr_enc_blk8) diff --git a/arch/arm64/crypto/sm4-neon-glue.c b/arch/arm64/crypto/sm4-neon-glue.c new file mode 100644 index 000000000000..03a6a6866a31 --- /dev/null +++ b/arch/arm64/crypto/sm4-neon-glue.c @@ -0,0 +1,442 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SM4 Cipher Algorithm, using ARMv8 NEON + * as specified in + * https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html + * + * Copyright (C) 2022, Alibaba Group. + * Copyright (C) 2022 Tianjia Zhang tianjia.zhang@linux.alibaba.com + */ + +#include <linux/module.h> +#include <linux/crypto.h> +#include <linux/kernel.h> +#include <linux/cpufeature.h> +#include <asm/neon.h> +#include <asm/simd.h> +#include <crypto/internal/simd.h> +#include <crypto/internal/skcipher.h> +#include <crypto/sm4.h> + +#define BYTES2BLKS(nbytes) ((nbytes) >> 4) +#define BYTES2BLK8(nbytes) (((nbytes) >> 4) & ~(8 - 1)) + +asmlinkage void sm4_neon_crypt_blk1_8(const u32 *rkey, u8 *dst, const u8 *src, + unsigned int nblks); +asmlinkage void sm4_neon_crypt_blk8(const u32 *rkey, u8 *dst, const u8 *src, + unsigned int nblks); +asmlinkage void sm4_neon_cbc_dec_blk8(const u32 *rkey, u8 *dst, const u8 *src, + u8 *iv, unsigned int nblks); +asmlinkage void sm4_neon_cfb_dec_blk8(const u32 *rkey, u8 *dst, const u8 *src, + u8 *iv, unsigned int nblks); +asmlinkage void sm4_neon_ctr_enc_blk8(const u32 *rkey, u8 *dst, const u8 *src, + u8 *iv, unsigned int nblks); + +static int sm4_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int key_len) +{ + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + + return sm4_expandkey(ctx, key, key_len); +} + +static int sm4_ecb_do_crypt(struct skcipher_request *req, const u32 *rkey) +{ + struct skcipher_walk walk; + unsigned int nbytes; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while ((nbytes = walk.nbytes) > 0) { + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + unsigned int nblks; + + kernel_neon_begin(); + + nblks = BYTES2BLK8(nbytes); + if (nblks) { + sm4_neon_crypt_blk8(rkey, dst, src, nblks); + dst += nblks * SM4_BLOCK_SIZE; + src += nblks * SM4_BLOCK_SIZE; + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + nblks = BYTES2BLKS(nbytes); + if (nblks) { + sm4_neon_crypt_blk1_8(rkey, dst, src, nblks); + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + kernel_neon_end(); + + err = skcipher_walk_done(&walk, nbytes); + } + + return err; +} + +static int sm4_ecb_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + + return sm4_ecb_do_crypt(req, ctx->rkey_enc); +} + +static int sm4_ecb_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + + return sm4_ecb_do_crypt(req, ctx->rkey_dec); +} + +static int sm4_cbc_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while ((nbytes = walk.nbytes) > 0) { + const u8 *iv = walk.iv; + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + + while (nbytes >= SM4_BLOCK_SIZE) { + crypto_xor_cpy(dst, src, iv, SM4_BLOCK_SIZE); + sm4_crypt_block(ctx->rkey_enc, dst, dst); + iv = dst; + src += SM4_BLOCK_SIZE; + dst += SM4_BLOCK_SIZE; + nbytes -= SM4_BLOCK_SIZE; + } + if (iv != walk.iv) + memcpy(walk.iv, iv, SM4_BLOCK_SIZE); + + err = skcipher_walk_done(&walk, nbytes); + } + + return err; +} + +static int sm4_cbc_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while ((nbytes = walk.nbytes) > 0) { + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + unsigned int nblks; + + kernel_neon_begin(); + + nblks = BYTES2BLK8(nbytes); + if (nblks) { + sm4_neon_cbc_dec_blk8(ctx->rkey_dec, dst, src, + walk.iv, nblks); + dst += nblks * SM4_BLOCK_SIZE; + src += nblks * SM4_BLOCK_SIZE; + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + nblks = BYTES2BLKS(nbytes); + if (nblks) { + u8 keystream[SM4_BLOCK_SIZE * 8]; + u8 iv[SM4_BLOCK_SIZE]; + int i; + + sm4_neon_crypt_blk1_8(ctx->rkey_dec, keystream, + src, nblks); + + src += ((int)nblks - 2) * SM4_BLOCK_SIZE; + dst += (nblks - 1) * SM4_BLOCK_SIZE; + memcpy(iv, src + SM4_BLOCK_SIZE, SM4_BLOCK_SIZE); + + for (i = nblks - 1; i > 0; i--) { + crypto_xor_cpy(dst, src, + &keystream[i * SM4_BLOCK_SIZE], + SM4_BLOCK_SIZE); + src -= SM4_BLOCK_SIZE; + dst -= SM4_BLOCK_SIZE; + } + crypto_xor_cpy(dst, walk.iv, + keystream, SM4_BLOCK_SIZE); + memcpy(walk.iv, iv, SM4_BLOCK_SIZE); + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + kernel_neon_end(); + + err = skcipher_walk_done(&walk, nbytes); + } + + return err; +} + +static int sm4_cfb_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while ((nbytes = walk.nbytes) > 0) { + u8 keystream[SM4_BLOCK_SIZE]; + const u8 *iv = walk.iv; + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + + while (nbytes >= SM4_BLOCK_SIZE) { + sm4_crypt_block(ctx->rkey_enc, keystream, iv); + crypto_xor_cpy(dst, src, keystream, SM4_BLOCK_SIZE); + iv = dst; + src += SM4_BLOCK_SIZE; + dst += SM4_BLOCK_SIZE; + nbytes -= SM4_BLOCK_SIZE; + } + if (iv != walk.iv) + memcpy(walk.iv, iv, SM4_BLOCK_SIZE); + + /* tail */ + if (walk.nbytes == walk.total && nbytes > 0) { + sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv); + crypto_xor_cpy(dst, src, keystream, nbytes); + nbytes = 0; + } + + err = skcipher_walk_done(&walk, nbytes); + } + + return err; +} + +static int sm4_cfb_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while ((nbytes = walk.nbytes) > 0) { + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + unsigned int nblks; + + kernel_neon_begin(); + + nblks = BYTES2BLK8(nbytes); + if (nblks) { + sm4_neon_cfb_dec_blk8(ctx->rkey_enc, dst, src, + walk.iv, nblks); + dst += nblks * SM4_BLOCK_SIZE; + src += nblks * SM4_BLOCK_SIZE; + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + nblks = BYTES2BLKS(nbytes); + if (nblks) { + u8 keystream[SM4_BLOCK_SIZE * 8]; + + memcpy(keystream, walk.iv, SM4_BLOCK_SIZE); + if (nblks > 1) + memcpy(&keystream[SM4_BLOCK_SIZE], src, + (nblks - 1) * SM4_BLOCK_SIZE); + memcpy(walk.iv, src + (nblks - 1) * SM4_BLOCK_SIZE, + SM4_BLOCK_SIZE); + + sm4_neon_crypt_blk1_8(ctx->rkey_enc, keystream, + keystream, nblks); + + crypto_xor_cpy(dst, src, keystream, + nblks * SM4_BLOCK_SIZE); + dst += nblks * SM4_BLOCK_SIZE; + src += nblks * SM4_BLOCK_SIZE; + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + kernel_neon_end(); + + /* tail */ + if (walk.nbytes == walk.total && nbytes > 0) { + u8 keystream[SM4_BLOCK_SIZE]; + + sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv); + crypto_xor_cpy(dst, src, keystream, nbytes); + nbytes = 0; + } + + err = skcipher_walk_done(&walk, nbytes); + } + + return err; +} + +static int sm4_ctr_crypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + unsigned int nbytes; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while ((nbytes = walk.nbytes) > 0) { + const u8 *src = walk.src.virt.addr; + u8 *dst = walk.dst.virt.addr; + unsigned int nblks; + + kernel_neon_begin(); + + nblks = BYTES2BLK8(nbytes); + if (nblks) { + sm4_neon_ctr_enc_blk8(ctx->rkey_enc, dst, src, + walk.iv, nblks); + dst += nblks * SM4_BLOCK_SIZE; + src += nblks * SM4_BLOCK_SIZE; + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + nblks = BYTES2BLKS(nbytes); + if (nblks) { + u8 keystream[SM4_BLOCK_SIZE * 8]; + int i; + + for (i = 0; i < nblks; i++) { + memcpy(&keystream[i * SM4_BLOCK_SIZE], + walk.iv, SM4_BLOCK_SIZE); + crypto_inc(walk.iv, SM4_BLOCK_SIZE); + } + sm4_neon_crypt_blk1_8(ctx->rkey_enc, keystream, + keystream, nblks); + + crypto_xor_cpy(dst, src, keystream, + nblks * SM4_BLOCK_SIZE); + dst += nblks * SM4_BLOCK_SIZE; + src += nblks * SM4_BLOCK_SIZE; + nbytes -= nblks * SM4_BLOCK_SIZE; + } + + kernel_neon_end(); + + /* tail */ + if (walk.nbytes == walk.total && nbytes > 0) { + u8 keystream[SM4_BLOCK_SIZE]; + + sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv); + crypto_inc(walk.iv, SM4_BLOCK_SIZE); + crypto_xor_cpy(dst, src, keystream, nbytes); + nbytes = 0; + } + + err = skcipher_walk_done(&walk, nbytes); + } + + return err; +} + +static struct skcipher_alg sm4_algs[] = { + { + .base = { + .cra_name = "ecb(sm4)", + .cra_driver_name = "ecb-sm4-neon", + .cra_priority = 200, + .cra_blocksize = SM4_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sm4_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = SM4_KEY_SIZE, + .max_keysize = SM4_KEY_SIZE, + .setkey = sm4_setkey, + .encrypt = sm4_ecb_encrypt, + .decrypt = sm4_ecb_decrypt, + }, { + .base = { + .cra_name = "cbc(sm4)", + .cra_driver_name = "cbc-sm4-neon", + .cra_priority = 200, + .cra_blocksize = SM4_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sm4_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = SM4_KEY_SIZE, + .max_keysize = SM4_KEY_SIZE, + .ivsize = SM4_BLOCK_SIZE, + .setkey = sm4_setkey, + .encrypt = sm4_cbc_encrypt, + .decrypt = sm4_cbc_decrypt, + }, { + .base = { + .cra_name = "cfb(sm4)", + .cra_driver_name = "cfb-sm4-neon", + .cra_priority = 200, + .cra_blocksize = 1, + .cra_ctxsize = sizeof(struct sm4_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = SM4_KEY_SIZE, + .max_keysize = SM4_KEY_SIZE, + .ivsize = SM4_BLOCK_SIZE, + .chunksize = SM4_BLOCK_SIZE, + .setkey = sm4_setkey, + .encrypt = sm4_cfb_encrypt, + .decrypt = sm4_cfb_decrypt, + }, { + .base = { + .cra_name = "ctr(sm4)", + .cra_driver_name = "ctr-sm4-neon", + .cra_priority = 200, + .cra_blocksize = 1, + .cra_ctxsize = sizeof(struct sm4_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = SM4_KEY_SIZE, + .max_keysize = SM4_KEY_SIZE, + .ivsize = SM4_BLOCK_SIZE, + .chunksize = SM4_BLOCK_SIZE, + .setkey = sm4_setkey, + .encrypt = sm4_ctr_crypt, + .decrypt = sm4_ctr_crypt, + } +}; + +static int __init sm4_init(void) +{ + return crypto_register_skciphers(sm4_algs, ARRAY_SIZE(sm4_algs)); +} + +static void __exit sm4_exit(void) +{ + crypto_unregister_skciphers(sm4_algs, ARRAY_SIZE(sm4_algs)); +} + +module_init(sm4_init); +module_exit(sm4_exit); + +MODULE_DESCRIPTION("SM4 ECB/CBC/CFB/CTR using ARMv8 NEON"); +MODULE_ALIAS_CRYPTO("sm4-neon"); +MODULE_ALIAS_CRYPTO("sm4"); +MODULE_ALIAS_CRYPTO("ecb(sm4)"); +MODULE_ALIAS_CRYPTO("cbc(sm4)"); +MODULE_ALIAS_CRYPTO("cfb(sm4)"); +MODULE_ALIAS_CRYPTO("ctr(sm4)"); +MODULE_AUTHOR("Tianjia Zhang tianjia.zhang@linux.alibaba.com"); +MODULE_LICENSE("GPL v2");