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1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * SM4 Cipher Algorithm for ARMv8 with Crypto Extensions * 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> #include "sm4-ce-asm.h" .arch armv8-a+crypto .irp b, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \ 20, 24, 25, 26, 27, 28, 29, 30, 31 .set .Lv\b\().4s, \b .endr .macro sm4e, vd, vn .inst 0xcec08400 | (.L\vn << 5) | .L\vd .endm .macro sm4ekey, vd, vn, vm .inst 0xce60c800 | (.L\vm << 16) | (.L\vn << 5) | .L\vd .endm /* Register macros */ #define RTMP0 v16 #define RTMP1 v17 #define RTMP2 v18 #define RTMP3 v19 #define RIV v20 #define RMAC v20 #define RMASK v21 .align 3 SYM_FUNC_START(sm4_ce_expand_key) /* input: * x0: 128-bit key * x1: rkey_enc * x2: rkey_dec * x3: fk array * x4: ck array */ ld1 {v0.16b}, [x0]; rev32 v0.16b, v0.16b; ld1 {v1.16b}, [x3]; /* load ck */ ld1 {v24.16b-v27.16b}, [x4], #64; ld1 {v28.16b-v31.16b}, [x4]; /* input ^ fk */ eor v0.16b, v0.16b, v1.16b; sm4ekey v0.4s, v0.4s, v24.4s; sm4ekey v1.4s, v0.4s, v25.4s; sm4ekey v2.4s, v1.4s, v26.4s; sm4ekey v3.4s, v2.4s, v27.4s; sm4ekey v4.4s, v3.4s, v28.4s; sm4ekey v5.4s, v4.4s, v29.4s; sm4ekey v6.4s, v5.4s, v30.4s; sm4ekey v7.4s, v6.4s, v31.4s; adr_l x5, .Lbswap128_mask ld1 {v24.16b}, [x5] st1 {v0.16b-v3.16b}, [x1], #64; st1 {v4.16b-v7.16b}, [x1]; tbl v16.16b, {v7.16b}, v24.16b tbl v17.16b, {v6.16b}, v24.16b tbl v18.16b, {v5.16b}, v24.16b tbl v19.16b, {v4.16b}, v24.16b tbl v20.16b, {v3.16b}, v24.16b tbl v21.16b, {v2.16b}, v24.16b tbl v22.16b, {v1.16b}, v24.16b tbl v23.16b, {v0.16b}, v24.16b st1 {v16.16b-v19.16b}, [x2], #64 st1 {v20.16b-v23.16b}, [x2] ret; SYM_FUNC_END(sm4_ce_expand_key) .align 3 SYM_FUNC_START(sm4_ce_crypt_block) /* input: * x0: round key array, CTX * x1: dst * x2: src */ SM4_PREPARE(x0) ld1 {v0.16b}, [x2]; SM4_CRYPT_BLK(v0); st1 {v0.16b}, [x1]; ret; SYM_FUNC_END(sm4_ce_crypt_block) .align 3 SYM_FUNC_START(sm4_ce_crypt) /* input: * x0: round key array, CTX * x1: dst * x2: src * w3: nblocks */ SM4_PREPARE(x0) .Lcrypt_loop_blk: sub w3, w3, #8; tbnz w3, #31, .Lcrypt_tail8; 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; cbz w3, .Lcrypt_end; b .Lcrypt_loop_blk; .Lcrypt_tail8: add w3, w3, #8; cmp w3, #4; blt .Lcrypt_tail4; sub w3, w3, #4; ld1 {v0.16b-v3.16b}, [x2], #64; SM4_CRYPT_BLK4(v0, v1, v2, v3); st1 {v0.16b-v3.16b}, [x1], #64; cbz w3, .Lcrypt_end; .Lcrypt_tail4: sub w3, w3, #1; ld1 {v0.16b}, [x2], #16; SM4_CRYPT_BLK(v0); st1 {v0.16b}, [x1], #16; cbnz w3, .Lcrypt_tail4; .Lcrypt_end: ret; SYM_FUNC_END(sm4_ce_crypt) .align 3 SYM_FUNC_START(sm4_ce_cbc_enc) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) * w4: nblocks */ SM4_PREPARE(x0) ld1 {RIV.16b}, [x3] .Lcbc_enc_loop_4x: cmp w4, #4 blt .Lcbc_enc_loop_1x sub w4, w4, #4 ld1 {v0.16b-v3.16b}, [x2], #64 eor v0.16b, v0.16b, RIV.16b SM4_CRYPT_BLK(v0) eor v1.16b, v1.16b, v0.16b SM4_CRYPT_BLK(v1) eor v2.16b, v2.16b, v1.16b SM4_CRYPT_BLK(v2) eor v3.16b, v3.16b, v2.16b SM4_CRYPT_BLK(v3) st1 {v0.16b-v3.16b}, [x1], #64 mov RIV.16b, v3.16b cbz w4, .Lcbc_enc_end b .Lcbc_enc_loop_4x .Lcbc_enc_loop_1x: sub w4, w4, #1 ld1 {v0.16b}, [x2], #16 eor RIV.16b, RIV.16b, v0.16b SM4_CRYPT_BLK(RIV) st1 {RIV.16b}, [x1], #16 cbnz w4, .Lcbc_enc_loop_1x .Lcbc_enc_end: /* store new IV */ st1 {RIV.16b}, [x3] ret SYM_FUNC_END(sm4_ce_cbc_enc) .align 3 SYM_FUNC_START(sm4_ce_cbc_dec) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) * w4: nblocks */ SM4_PREPARE(x0) ld1 {RIV.16b}, [x3] .Lcbc_dec_loop_8x: sub w4, w4, #8 tbnz w4, #31, .Lcbc_dec_4x ld1 {v0.16b-v3.16b}, [x2], #64 ld1 {v4.16b-v7.16b}, [x2], #64 rev32 v8.16b, v0.16b rev32 v9.16b, v1.16b rev32 v10.16b, v2.16b rev32 v11.16b, v3.16b rev32 v12.16b, v4.16b rev32 v13.16b, v5.16b rev32 v14.16b, v6.16b rev32 v15.16b, v7.16b SM4_CRYPT_BLK8_BE(v8, v9, v10, v11, v12, v13, v14, v15) eor v8.16b, v8.16b, RIV.16b eor v9.16b, v9.16b, v0.16b eor v10.16b, v10.16b, v1.16b eor v11.16b, v11.16b, v2.16b eor v12.16b, v12.16b, v3.16b eor v13.16b, v13.16b, v4.16b eor v14.16b, v14.16b, v5.16b eor v15.16b, v15.16b, v6.16b st1 {v8.16b-v11.16b}, [x1], #64 st1 {v12.16b-v15.16b}, [x1], #64 mov RIV.16b, v7.16b cbz w4, .Lcbc_dec_end b .Lcbc_dec_loop_8x .Lcbc_dec_4x: add w4, w4, #8 cmp w4, #4 blt .Lcbc_dec_loop_1x sub w4, w4, #4 ld1 {v0.16b-v3.16b}, [x2], #64 rev32 v8.16b, v0.16b rev32 v9.16b, v1.16b rev32 v10.16b, v2.16b rev32 v11.16b, v3.16b SM4_CRYPT_BLK4_BE(v8, v9, v10, v11) eor v8.16b, v8.16b, RIV.16b eor v9.16b, v9.16b, v0.16b eor v10.16b, v10.16b, v1.16b eor v11.16b, v11.16b, v2.16b st1 {v8.16b-v11.16b}, [x1], #64 mov RIV.16b, v3.16b cbz w4, .Lcbc_dec_end .Lcbc_dec_loop_1x: sub w4, w4, #1 ld1 {v0.16b}, [x2], #16 rev32 v8.16b, v0.16b SM4_CRYPT_BLK_BE(v8) eor v8.16b, v8.16b, RIV.16b st1 {v8.16b}, [x1], #16 mov RIV.16b, v0.16b cbnz w4, .Lcbc_dec_loop_1x .Lcbc_dec_end: /* store new IV */ st1 {RIV.16b}, [x3] ret SYM_FUNC_END(sm4_ce_cbc_dec) .align 3 SYM_FUNC_START(sm4_ce_cbc_cts_enc) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) * w4: nbytes */ SM4_PREPARE(x0) sub w5, w4, #16 uxtw x5, w5 ld1 {RIV.16b}, [x3] ld1 {v0.16b}, [x2] eor RIV.16b, RIV.16b, v0.16b SM4_CRYPT_BLK(RIV) /* load permute table */ adr_l x6, .Lcts_permute_table add x7, x6, #32 add x6, x6, x5 sub x7, x7, x5 ld1 {v3.16b}, [x6] ld1 {v4.16b}, [x7] /* overlapping loads */ add x2, x2, x5 ld1 {v1.16b}, [x2] /* create Cn from En-1 */ tbl v0.16b, {RIV.16b}, v3.16b /* padding Pn with zeros */ tbl v1.16b, {v1.16b}, v4.16b eor v1.16b, v1.16b, RIV.16b SM4_CRYPT_BLK(v1) /* overlapping stores */ add x5, x1, x5 st1 {v0.16b}, [x5] st1 {v1.16b}, [x1] ret SYM_FUNC_END(sm4_ce_cbc_cts_enc) .align 3 SYM_FUNC_START(sm4_ce_cbc_cts_dec) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) * w4: nbytes */ SM4_PREPARE(x0) sub w5, w4, #16 uxtw x5, w5 ld1 {RIV.16b}, [x3] /* load permute table */ adr_l x6, .Lcts_permute_table add x7, x6, #32 add x6, x6, x5 sub x7, x7, x5 ld1 {v3.16b}, [x6] ld1 {v4.16b}, [x7] /* overlapping loads */ ld1 {v0.16b}, [x2], x5 ld1 {v1.16b}, [x2] SM4_CRYPT_BLK(v0) /* select the first Ln bytes of Xn to create Pn */ tbl v2.16b, {v0.16b}, v3.16b eor v2.16b, v2.16b, v1.16b /* overwrite the first Ln bytes with Cn to create En-1 */ tbx v0.16b, {v1.16b}, v4.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, RIV.16b /* overlapping stores */ add x5, x1, x5 st1 {v2.16b}, [x5] st1 {v0.16b}, [x1] ret SYM_FUNC_END(sm4_ce_cbc_cts_dec) .align 3 SYM_FUNC_START(sm4_ce_cfb_enc) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) * w4: nblocks */ SM4_PREPARE(x0) ld1 {RIV.16b}, [x3] .Lcfb_enc_loop_4x: cmp w4, #4 blt .Lcfb_enc_loop_1x sub w4, w4, #4 ld1 {v0.16b-v3.16b}, [x2], #64 rev32 v8.16b, RIV.16b SM4_CRYPT_BLK_BE(v8) eor v0.16b, v0.16b, v8.16b rev32 v8.16b, v0.16b SM4_CRYPT_BLK_BE(v8) eor v1.16b, v1.16b, v8.16b rev32 v8.16b, v1.16b SM4_CRYPT_BLK_BE(v8) eor v2.16b, v2.16b, v8.16b rev32 v8.16b, v2.16b SM4_CRYPT_BLK_BE(v8) eor v3.16b, v3.16b, v8.16b st1 {v0.16b-v3.16b}, [x1], #64 mov RIV.16b, v3.16b cbz w4, .Lcfb_enc_end b .Lcfb_enc_loop_4x .Lcfb_enc_loop_1x: sub w4, w4, #1 ld1 {v0.16b}, [x2], #16 SM4_CRYPT_BLK(RIV) eor RIV.16b, RIV.16b, v0.16b st1 {RIV.16b}, [x1], #16 cbnz w4, .Lcfb_enc_loop_1x .Lcfb_enc_end: /* store new IV */ st1 {RIV.16b}, [x3] ret SYM_FUNC_END(sm4_ce_cfb_enc) .align 3 SYM_FUNC_START(sm4_ce_cfb_dec) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: iv (big endian, 128 bit) * w4: nblocks */ SM4_PREPARE(x0) ld1 {RIV.16b}, [x3] .Lcfb_dec_loop_8x: sub w4, w4, #8 tbnz w4, #31, .Lcfb_dec_4x ld1 {v0.16b-v3.16b}, [x2], #64 ld1 {v4.16b-v7.16b}, [x2], #64 rev32 v8.16b, RIV.16b rev32 v9.16b, v0.16b rev32 v10.16b, v1.16b rev32 v11.16b, v2.16b rev32 v12.16b, v3.16b rev32 v13.16b, v4.16b rev32 v14.16b, v5.16b rev32 v15.16b, v6.16b SM4_CRYPT_BLK8_BE(v8, v9, v10, v11, v12, v13, v14, v15) mov RIV.16b, v7.16b eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b eor v4.16b, v4.16b, v12.16b eor v5.16b, v5.16b, v13.16b eor v6.16b, v6.16b, v14.16b eor v7.16b, v7.16b, v15.16b st1 {v0.16b-v3.16b}, [x1], #64 st1 {v4.16b-v7.16b}, [x1], #64 cbz w4, .Lcfb_dec_end b .Lcfb_dec_loop_8x .Lcfb_dec_4x: add w4, w4, #8 cmp w4, #4 blt .Lcfb_dec_loop_1x sub w4, w4, #4 ld1 {v0.16b-v3.16b}, [x2], #64 rev32 v8.16b, RIV.16b rev32 v9.16b, v0.16b rev32 v10.16b, v1.16b rev32 v11.16b, v2.16b SM4_CRYPT_BLK4_BE(v8, v9, v10, v11) mov RIV.16b, v3.16b eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b st1 {v0.16b-v3.16b}, [x1], #64 cbz w4, .Lcfb_dec_end .Lcfb_dec_loop_1x: sub w4, w4, #1 ld1 {v0.16b}, [x2], #16 SM4_CRYPT_BLK(RIV) eor RIV.16b, RIV.16b, v0.16b st1 {RIV.16b}, [x1], #16 mov RIV.16b, v0.16b cbnz w4, .Lcfb_dec_loop_1x .Lcfb_dec_end: /* store new IV */ st1 {RIV.16b}, [x3] ret SYM_FUNC_END(sm4_ce_cfb_dec) .align 3 SYM_FUNC_START(sm4_ce_ctr_enc) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: ctr (big endian, 128 bit) * w4: nblocks */ SM4_PREPARE(x0) ldp x7, x8, [x3] rev x7, x7 rev x8, x8 .Lctr_loop_8x: sub w4, w4, #8 tbnz w4, #31, .Lctr_4x #define inc_le128(vctr) \ mov vctr.d[1], x8; \ mov vctr.d[0], x7; \ adds x8, x8, #1; \ rev64 vctr.16b, vctr.16b; \ adc x7, x7, xzr; /* 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 */ ld1 {v8.16b-v11.16b}, [x2], #64 ld1 {v12.16b-v15.16b}, [x2], #64 SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7) eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b eor v4.16b, v4.16b, v12.16b eor v5.16b, v5.16b, v13.16b eor v6.16b, v6.16b, v14.16b eor v7.16b, v7.16b, v15.16b st1 {v0.16b-v3.16b}, [x1], #64 st1 {v4.16b-v7.16b}, [x1], #64 cbz w4, .Lctr_end b .Lctr_loop_8x .Lctr_4x: add w4, w4, #8 cmp w4, #4 blt .Lctr_loop_1x sub w4, w4, #4 /* construct CTRs */ inc_le128(v0) /* +0 */ inc_le128(v1) /* +1 */ inc_le128(v2) /* +2 */ inc_le128(v3) /* +3 */ ld1 {v8.16b-v11.16b}, [x2], #64 SM4_CRYPT_BLK4(v0, v1, v2, v3) eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b st1 {v0.16b-v3.16b}, [x1], #64 cbz w4, .Lctr_end .Lctr_loop_1x: sub w4, w4, #1 /* construct CTRs */ inc_le128(v0) ld1 {v8.16b}, [x2], #16 SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v8.16b st1 {v0.16b}, [x1], #16 cbnz w4, .Lctr_loop_1x .Lctr_end: /* store new CTR */ rev x7, x7 rev x8, x8 stp x7, x8, [x3] ret SYM_FUNC_END(sm4_ce_ctr_enc) #define tweak_next(vt, vin, RTMP) \ sshr RTMP.2d, vin.2d, #63; \ and RTMP.16b, RTMP.16b, RMASK.16b; \ add vt.2d, vin.2d, vin.2d; \ ext RTMP.16b, RTMP.16b, RTMP.16b, #8; \ eor vt.16b, vt.16b, RTMP.16b; .align 3 SYM_FUNC_START(sm4_ce_xts_enc) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: tweak (big endian, 128 bit) * w4: nbytes * x5: round key array for IV */ ld1 {v8.16b}, [x3] cbz x5, .Lxts_enc_nofirst SM4_PREPARE(x5) /* Generate first tweak */ SM4_CRYPT_BLK(v8) .Lxts_enc_nofirst: SM4_PREPARE(x0) ands w5, w4, #15 lsr w4, w4, #4 sub w6, w4, #1 csel w4, w4, w6, eq uxtw x5, w5 movi RMASK.2s, #0x1 movi RTMP0.2s, #0x87 uzp1 RMASK.4s, RMASK.4s, RTMP0.4s cbz w4, .Lxts_enc_cts .Lxts_enc_loop_8x: sub w4, w4, #8 tbnz w4, #31, .Lxts_enc_4x tweak_next( v9, v8, RTMP0) tweak_next(v10, v9, RTMP1) tweak_next(v11, v10, RTMP2) tweak_next(v12, v11, RTMP3) tweak_next(v13, v12, RTMP0) tweak_next(v14, v13, RTMP1) tweak_next(v15, v14, RTMP2) ld1 {v0.16b-v3.16b}, [x2], #64 ld1 {v4.16b-v7.16b}, [x2], #64 eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b eor v4.16b, v4.16b, v12.16b eor v5.16b, v5.16b, v13.16b eor v6.16b, v6.16b, v14.16b eor v7.16b, v7.16b, v15.16b SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7) eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b eor v4.16b, v4.16b, v12.16b eor v5.16b, v5.16b, v13.16b eor v6.16b, v6.16b, v14.16b eor v7.16b, v7.16b, v15.16b st1 {v0.16b-v3.16b}, [x1], #64 st1 {v4.16b-v7.16b}, [x1], #64 tweak_next(v8, v15, RTMP3) cbz w4, .Lxts_enc_cts b .Lxts_enc_loop_8x .Lxts_enc_4x: add w4, w4, #8 cmp w4, #4 blt .Lxts_enc_loop_1x sub w4, w4, #4 tweak_next( v9, v8, RTMP0) tweak_next(v10, v9, RTMP1) tweak_next(v11, v10, RTMP2) ld1 {v0.16b-v3.16b}, [x2], #64 eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b SM4_CRYPT_BLK4(v0, v1, v2, v3) eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b st1 {v0.16b-v3.16b}, [x1], #64 tweak_next(v8, v11, RTMP3) cbz w4, .Lxts_enc_cts .Lxts_enc_loop_1x: sub w4, w4, #1 ld1 {v0.16b}, [x2], #16 eor v0.16b, v0.16b, v8.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v8.16b st1 {v0.16b}, [x1], #16 tweak_next(v8, v8, RTMP0) cbnz w4, .Lxts_enc_loop_1x .Lxts_enc_cts: cbz x5, .Lxts_enc_end /* cipher text stealing */ tweak_next(v9, v8, RTMP0) ld1 {v0.16b}, [x2] eor v0.16b, v0.16b, v8.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v8.16b /* load permute table */ adr_l x6, .Lcts_permute_table add x7, x6, #32 add x6, x6, x5 sub x7, x7, x5 ld1 {v3.16b}, [x6] ld1 {v4.16b}, [x7] /* overlapping loads */ add x2, x2, x5 ld1 {v1.16b}, [x2] /* create Cn from En-1 */ tbl v2.16b, {v0.16b}, v3.16b /* padding Pn with En-1 at the end */ tbx v0.16b, {v1.16b}, v4.16b eor v0.16b, v0.16b, v9.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v9.16b /* overlapping stores */ add x5, x1, x5 st1 {v2.16b}, [x5] st1 {v0.16b}, [x1] b .Lxts_enc_ret .Lxts_enc_end: /* store new tweak */ st1 {v8.16b}, [x3] .Lxts_enc_ret: ret SYM_FUNC_END(sm4_ce_xts_enc) .align 3 SYM_FUNC_START(sm4_ce_xts_dec) /* input: * x0: round key array, CTX * x1: dst * x2: src * x3: tweak (big endian, 128 bit) * w4: nbytes * x5: round key array for IV */ ld1 {v8.16b}, [x3] cbz x5, .Lxts_dec_nofirst SM4_PREPARE(x5) /* Generate first tweak */ SM4_CRYPT_BLK(v8) .Lxts_dec_nofirst: SM4_PREPARE(x0) ands w5, w4, #15 lsr w4, w4, #4 sub w6, w4, #1 csel w4, w4, w6, eq uxtw x5, w5 movi RMASK.2s, #0x1 movi RTMP0.2s, #0x87 uzp1 RMASK.4s, RMASK.4s, RTMP0.4s cbz w4, .Lxts_dec_cts .Lxts_dec_loop_8x: sub w4, w4, #8 tbnz w4, #31, .Lxts_dec_4x tweak_next( v9, v8, RTMP0) tweak_next(v10, v9, RTMP1) tweak_next(v11, v10, RTMP2) tweak_next(v12, v11, RTMP3) tweak_next(v13, v12, RTMP0) tweak_next(v14, v13, RTMP1) tweak_next(v15, v14, RTMP2) ld1 {v0.16b-v3.16b}, [x2], #64 ld1 {v4.16b-v7.16b}, [x2], #64 eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b eor v4.16b, v4.16b, v12.16b eor v5.16b, v5.16b, v13.16b eor v6.16b, v6.16b, v14.16b eor v7.16b, v7.16b, v15.16b SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7) eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b eor v4.16b, v4.16b, v12.16b eor v5.16b, v5.16b, v13.16b eor v6.16b, v6.16b, v14.16b eor v7.16b, v7.16b, v15.16b st1 {v0.16b-v3.16b}, [x1], #64 st1 {v4.16b-v7.16b}, [x1], #64 tweak_next(v8, v15, RTMP3) cbz w4, .Lxts_dec_cts b .Lxts_dec_loop_8x .Lxts_dec_4x: add w4, w4, #8 cmp w4, #4 blt .Lxts_dec_loop_1x sub w4, w4, #4 tweak_next( v9, v8, RTMP0) tweak_next(v10, v9, RTMP1) tweak_next(v11, v10, RTMP2) ld1 {v0.16b-v3.16b}, [x2], #64 eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b SM4_CRYPT_BLK4(v0, v1, v2, v3) eor v0.16b, v0.16b, v8.16b eor v1.16b, v1.16b, v9.16b eor v2.16b, v2.16b, v10.16b eor v3.16b, v3.16b, v11.16b st1 {v0.16b-v3.16b}, [x1], #64 tweak_next(v8, v11, RTMP3) cbz w4, .Lxts_dec_cts .Lxts_dec_loop_1x: sub w4, w4, #1 ld1 {v0.16b}, [x2], #16 eor v0.16b, v0.16b, v8.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v8.16b st1 {v0.16b}, [x1], #16 tweak_next(v8, v8, RTMP0) cbnz w4, .Lxts_dec_loop_1x .Lxts_dec_cts: cbz x5, .Lxts_dec_end /* cipher text stealing */ tweak_next(v9, v8, RTMP0) ld1 {v0.16b}, [x2] eor v0.16b, v0.16b, v9.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v9.16b /* load permute table */ adr_l x6, .Lcts_permute_table add x7, x6, #32 add x6, x6, x5 sub x7, x7, x5 ld1 {v3.16b}, [x6] ld1 {v4.16b}, [x7] /* overlapping loads */ add x2, x2, x5 ld1 {v1.16b}, [x2] /* create Cn from En-1 */ tbl v2.16b, {v0.16b}, v3.16b /* padding Pn with En-1 at the end */ tbx v0.16b, {v1.16b}, v4.16b eor v0.16b, v0.16b, v8.16b SM4_CRYPT_BLK(v0) eor v0.16b, v0.16b, v8.16b /* overlapping stores */ add x5, x1, x5 st1 {v2.16b}, [x5] st1 {v0.16b}, [x1] b .Lxts_dec_ret .Lxts_dec_end: /* store new tweak */ st1 {v8.16b}, [x3] .Lxts_dec_ret: ret SYM_FUNC_END(sm4_ce_xts_dec) .align 3 SYM_FUNC_START(sm4_ce_mac_update) /* input: * x0: round key array, CTX * x1: digest * x2: src * w3: nblocks * w4: enc_before * w5: enc_after */ SM4_PREPARE(x0) ld1 {RMAC.16b}, [x1] cbz w4, .Lmac_update SM4_CRYPT_BLK(RMAC) .Lmac_update: cbz w3, .Lmac_ret sub w6, w3, #1 cmp w5, wzr csel w3, w3, w6, ne cbz w3, .Lmac_end .Lmac_loop_4x: cmp w3, #4 blt .Lmac_loop_1x sub w3, w3, #4 ld1 {v0.16b-v3.16b}, [x2], #64 eor RMAC.16b, RMAC.16b, v0.16b SM4_CRYPT_BLK(RMAC) eor RMAC.16b, RMAC.16b, v1.16b SM4_CRYPT_BLK(RMAC) eor RMAC.16b, RMAC.16b, v2.16b SM4_CRYPT_BLK(RMAC) eor RMAC.16b, RMAC.16b, v3.16b SM4_CRYPT_BLK(RMAC) cbz w3, .Lmac_end b .Lmac_loop_4x .Lmac_loop_1x: sub w3, w3, #1 ld1 {v0.16b}, [x2], #16 eor RMAC.16b, RMAC.16b, v0.16b SM4_CRYPT_BLK(RMAC) cbnz w3, .Lmac_loop_1x .Lmac_end: cbnz w5, .Lmac_ret ld1 {v0.16b}, [x2], #16 eor RMAC.16b, RMAC.16b, v0.16b .Lmac_ret: st1 {RMAC.16b}, [x1] ret SYM_FUNC_END(sm4_ce_mac_update) .section ".rodata", "a" .align 4 .Lbswap128_mask: .byte 0x0c, 0x0d, 0x0e, 0x0f, 0x08, 0x09, 0x0a, 0x0b .byte 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03 .Lcts_permute_table: .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7 .byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |