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778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * Bit sliced AES using NEON instructions * * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org> */ /* * The algorithm implemented here is described in detail by the paper * 'Faster and Timing-Attack Resistant AES-GCM' by Emilia Kaesper and * Peter Schwabe (https://eprint.iacr.org/2009/129.pdf) * * This implementation is based primarily on the OpenSSL implementation * for 32-bit ARM written by Andy Polyakov <appro@openssl.org> */ #include <linux/linkage.h> #include <asm/assembler.h> .text rounds .req x11 bskey .req x12 .macro in_bs_ch, b0, b1, b2, b3, b4, b5, b6, b7 eor \b2, \b2, \b1 eor \b5, \b5, \b6 eor \b3, \b3, \b0 eor \b6, \b6, \b2 eor \b5, \b5, \b0 eor \b6, \b6, \b3 eor \b3, \b3, \b7 eor \b7, \b7, \b5 eor \b3, \b3, \b4 eor \b4, \b4, \b5 eor \b2, \b2, \b7 eor \b3, \b3, \b1 eor \b1, \b1, \b5 .endm .macro out_bs_ch, b0, b1, b2, b3, b4, b5, b6, b7 eor \b0, \b0, \b6 eor \b1, \b1, \b4 eor \b4, \b4, \b6 eor \b2, \b2, \b0 eor \b6, \b6, \b1 eor \b1, \b1, \b5 eor \b5, \b5, \b3 eor \b3, \b3, \b7 eor \b7, \b7, \b5 eor \b2, \b2, \b5 eor \b4, \b4, \b7 .endm .macro inv_in_bs_ch, b6, b1, b2, b4, b7, b0, b3, b5 eor \b1, \b1, \b7 eor \b4, \b4, \b7 eor \b7, \b7, \b5 eor \b1, \b1, \b3 eor \b2, \b2, \b5 eor \b3, \b3, \b7 eor \b6, \b6, \b1 eor \b2, \b2, \b0 eor \b5, \b5, \b3 eor \b4, \b4, \b6 eor \b0, \b0, \b6 eor \b1, \b1, \b4 .endm .macro inv_out_bs_ch, b6, b5, b0, b3, b7, b1, b4, b2 eor \b1, \b1, \b5 eor \b2, \b2, \b7 eor \b3, \b3, \b1 eor \b4, \b4, \b5 eor \b7, \b7, \b5 eor \b3, \b3, \b4 eor \b5, \b5, \b0 eor \b3, \b3, \b7 eor \b6, \b6, \b2 eor \b2, \b2, \b1 eor \b6, \b6, \b3 eor \b3, \b3, \b0 eor \b5, \b5, \b6 .endm .macro mul_gf4, x0, x1, y0, y1, t0, t1 eor \t0, \y0, \y1 and \t0, \t0, \x0 eor \x0, \x0, \x1 and \t1, \x1, \y0 and \x0, \x0, \y1 eor \x1, \t1, \t0 eor \x0, \x0, \t1 .endm .macro mul_gf4_n_gf4, x0, x1, y0, y1, t0, x2, x3, y2, y3, t1 eor \t0, \y0, \y1 eor \t1, \y2, \y3 and \t0, \t0, \x0 and \t1, \t1, \x2 eor \x0, \x0, \x1 eor \x2, \x2, \x3 and \x1, \x1, \y0 and \x3, \x3, \y2 and \x0, \x0, \y1 and \x2, \x2, \y3 eor \x1, \x1, \x0 eor \x2, \x2, \x3 eor \x0, \x0, \t0 eor \x3, \x3, \t1 .endm .macro mul_gf16_2, x0, x1, x2, x3, x4, x5, x6, x7, \ y0, y1, y2, y3, t0, t1, t2, t3 eor \t0, \x0, \x2 eor \t1, \x1, \x3 mul_gf4 \x0, \x1, \y0, \y1, \t2, \t3 eor \y0, \y0, \y2 eor \y1, \y1, \y3 mul_gf4_n_gf4 \t0, \t1, \y0, \y1, \t3, \x2, \x3, \y2, \y3, \t2 eor \x0, \x0, \t0 eor \x2, \x2, \t0 eor \x1, \x1, \t1 eor \x3, \x3, \t1 eor \t0, \x4, \x6 eor \t1, \x5, \x7 mul_gf4_n_gf4 \t0, \t1, \y0, \y1, \t3, \x6, \x7, \y2, \y3, \t2 eor \y0, \y0, \y2 eor \y1, \y1, \y3 mul_gf4 \x4, \x5, \y0, \y1, \t2, \t3 eor \x4, \x4, \t0 eor \x6, \x6, \t0 eor \x5, \x5, \t1 eor \x7, \x7, \t1 .endm .macro inv_gf256, x0, x1, x2, x3, x4, x5, x6, x7, \ t0, t1, t2, t3, s0, s1, s2, s3 eor \t3, \x4, \x6 eor \t0, \x5, \x7 eor \t1, \x1, \x3 eor \s1, \x7, \x6 eor \s0, \x0, \x2 eor \s3, \t3, \t0 orr \t2, \t0, \t1 and \s2, \t3, \s0 orr \t3, \t3, \s0 eor \s0, \s0, \t1 and \t0, \t0, \t1 eor \t1, \x3, \x2 and \s3, \s3, \s0 and \s1, \s1, \t1 eor \t1, \x4, \x5 eor \s0, \x1, \x0 eor \t3, \t3, \s1 eor \t2, \t2, \s1 and \s1, \t1, \s0 orr \t1, \t1, \s0 eor \t3, \t3, \s3 eor \t0, \t0, \s1 eor \t2, \t2, \s2 eor \t1, \t1, \s3 eor \t0, \t0, \s2 and \s0, \x7, \x3 eor \t1, \t1, \s2 and \s1, \x6, \x2 and \s2, \x5, \x1 orr \s3, \x4, \x0 eor \t3, \t3, \s0 eor \t1, \t1, \s2 eor \s0, \t0, \s3 eor \t2, \t2, \s1 and \s2, \t3, \t1 eor \s1, \t2, \s2 eor \s3, \s0, \s2 bsl \s1, \t1, \s0 not \t0, \s0 bsl \s0, \s1, \s3 bsl \t0, \s1, \s3 bsl \s3, \t3, \t2 eor \t3, \t3, \t2 and \s2, \s0, \s3 eor \t1, \t1, \t0 eor \s2, \s2, \t3 mul_gf16_2 \x0, \x1, \x2, \x3, \x4, \x5, \x6, \x7, \ \s3, \s2, \s1, \t1, \s0, \t0, \t2, \t3 .endm .macro sbox, b0, b1, b2, b3, b4, b5, b6, b7, \ t0, t1, t2, t3, s0, s1, s2, s3 in_bs_ch \b0\().16b, \b1\().16b, \b2\().16b, \b3\().16b, \ \b4\().16b, \b5\().16b, \b6\().16b, \b7\().16b inv_gf256 \b6\().16b, \b5\().16b, \b0\().16b, \b3\().16b, \ \b7\().16b, \b1\().16b, \b4\().16b, \b2\().16b, \ \t0\().16b, \t1\().16b, \t2\().16b, \t3\().16b, \ \s0\().16b, \s1\().16b, \s2\().16b, \s3\().16b out_bs_ch \b7\().16b, \b1\().16b, \b4\().16b, \b2\().16b, \ \b6\().16b, \b5\().16b, \b0\().16b, \b3\().16b .endm .macro inv_sbox, b0, b1, b2, b3, b4, b5, b6, b7, \ t0, t1, t2, t3, s0, s1, s2, s3 inv_in_bs_ch \b0\().16b, \b1\().16b, \b2\().16b, \b3\().16b, \ \b4\().16b, \b5\().16b, \b6\().16b, \b7\().16b inv_gf256 \b5\().16b, \b1\().16b, \b2\().16b, \b6\().16b, \ \b3\().16b, \b7\().16b, \b0\().16b, \b4\().16b, \ \t0\().16b, \t1\().16b, \t2\().16b, \t3\().16b, \ \s0\().16b, \s1\().16b, \s2\().16b, \s3\().16b inv_out_bs_ch \b3\().16b, \b7\().16b, \b0\().16b, \b4\().16b, \ \b5\().16b, \b1\().16b, \b2\().16b, \b6\().16b .endm .macro enc_next_rk ldp q16, q17, [bskey], #128 ldp q18, q19, [bskey, #-96] ldp q20, q21, [bskey, #-64] ldp q22, q23, [bskey, #-32] .endm .macro dec_next_rk ldp q16, q17, [bskey, #-128]! ldp q18, q19, [bskey, #32] ldp q20, q21, [bskey, #64] ldp q22, q23, [bskey, #96] .endm .macro add_round_key, x0, x1, x2, x3, x4, x5, x6, x7 eor \x0\().16b, \x0\().16b, v16.16b eor \x1\().16b, \x1\().16b, v17.16b eor \x2\().16b, \x2\().16b, v18.16b eor \x3\().16b, \x3\().16b, v19.16b eor \x4\().16b, \x4\().16b, v20.16b eor \x5\().16b, \x5\().16b, v21.16b eor \x6\().16b, \x6\().16b, v22.16b eor \x7\().16b, \x7\().16b, v23.16b .endm .macro shift_rows, x0, x1, x2, x3, x4, x5, x6, x7, mask tbl \x0\().16b, {\x0\().16b}, \mask\().16b tbl \x1\().16b, {\x1\().16b}, \mask\().16b tbl \x2\().16b, {\x2\().16b}, \mask\().16b tbl \x3\().16b, {\x3\().16b}, \mask\().16b tbl \x4\().16b, {\x4\().16b}, \mask\().16b tbl \x5\().16b, {\x5\().16b}, \mask\().16b tbl \x6\().16b, {\x6\().16b}, \mask\().16b tbl \x7\().16b, {\x7\().16b}, \mask\().16b .endm .macro mix_cols, x0, x1, x2, x3, x4, x5, x6, x7, \ t0, t1, t2, t3, t4, t5, t6, t7, inv ext \t0\().16b, \x0\().16b, \x0\().16b, #12 ext \t1\().16b, \x1\().16b, \x1\().16b, #12 eor \x0\().16b, \x0\().16b, \t0\().16b ext \t2\().16b, \x2\().16b, \x2\().16b, #12 eor \x1\().16b, \x1\().16b, \t1\().16b ext \t3\().16b, \x3\().16b, \x3\().16b, #12 eor \x2\().16b, \x2\().16b, \t2\().16b ext \t4\().16b, \x4\().16b, \x4\().16b, #12 eor \x3\().16b, \x3\().16b, \t3\().16b ext \t5\().16b, \x5\().16b, \x5\().16b, #12 eor \x4\().16b, \x4\().16b, \t4\().16b ext \t6\().16b, \x6\().16b, \x6\().16b, #12 eor \x5\().16b, \x5\().16b, \t5\().16b ext \t7\().16b, \x7\().16b, \x7\().16b, #12 eor \x6\().16b, \x6\().16b, \t6\().16b eor \t1\().16b, \t1\().16b, \x0\().16b eor \x7\().16b, \x7\().16b, \t7\().16b ext \x0\().16b, \x0\().16b, \x0\().16b, #8 eor \t2\().16b, \t2\().16b, \x1\().16b eor \t0\().16b, \t0\().16b, \x7\().16b eor \t1\().16b, \t1\().16b, \x7\().16b ext \x1\().16b, \x1\().16b, \x1\().16b, #8 eor \t5\().16b, \t5\().16b, \x4\().16b eor \x0\().16b, \x0\().16b, \t0\().16b eor \t6\().16b, \t6\().16b, \x5\().16b eor \x1\().16b, \x1\().16b, \t1\().16b ext \t0\().16b, \x4\().16b, \x4\().16b, #8 eor \t4\().16b, \t4\().16b, \x3\().16b ext \t1\().16b, \x5\().16b, \x5\().16b, #8 eor \t7\().16b, \t7\().16b, \x6\().16b ext \x4\().16b, \x3\().16b, \x3\().16b, #8 eor \t3\().16b, \t3\().16b, \x2\().16b ext \x5\().16b, \x7\().16b, \x7\().16b, #8 eor \t4\().16b, \t4\().16b, \x7\().16b ext \x3\().16b, \x6\().16b, \x6\().16b, #8 eor \t3\().16b, \t3\().16b, \x7\().16b ext \x6\().16b, \x2\().16b, \x2\().16b, #8 eor \x7\().16b, \t1\().16b, \t5\().16b .ifb \inv eor \x2\().16b, \t0\().16b, \t4\().16b eor \x4\().16b, \x4\().16b, \t3\().16b eor \x5\().16b, \x5\().16b, \t7\().16b eor \x3\().16b, \x3\().16b, \t6\().16b eor \x6\().16b, \x6\().16b, \t2\().16b .else eor \t3\().16b, \t3\().16b, \x4\().16b eor \x5\().16b, \x5\().16b, \t7\().16b eor \x2\().16b, \x3\().16b, \t6\().16b eor \x3\().16b, \t0\().16b, \t4\().16b eor \x4\().16b, \x6\().16b, \t2\().16b mov \x6\().16b, \t3\().16b .endif .endm .macro inv_mix_cols, x0, x1, x2, x3, x4, x5, x6, x7, \ t0, t1, t2, t3, t4, t5, t6, t7 ext \t0\().16b, \x0\().16b, \x0\().16b, #8 ext \t6\().16b, \x6\().16b, \x6\().16b, #8 ext \t7\().16b, \x7\().16b, \x7\().16b, #8 eor \t0\().16b, \t0\().16b, \x0\().16b ext \t1\().16b, \x1\().16b, \x1\().16b, #8 eor \t6\().16b, \t6\().16b, \x6\().16b ext \t2\().16b, \x2\().16b, \x2\().16b, #8 eor \t7\().16b, \t7\().16b, \x7\().16b ext \t3\().16b, \x3\().16b, \x3\().16b, #8 eor \t1\().16b, \t1\().16b, \x1\().16b ext \t4\().16b, \x4\().16b, \x4\().16b, #8 eor \t2\().16b, \t2\().16b, \x2\().16b ext \t5\().16b, \x5\().16b, \x5\().16b, #8 eor \t3\().16b, \t3\().16b, \x3\().16b eor \t4\().16b, \t4\().16b, \x4\().16b eor \t5\().16b, \t5\().16b, \x5\().16b eor \x0\().16b, \x0\().16b, \t6\().16b eor \x1\().16b, \x1\().16b, \t6\().16b eor \x2\().16b, \x2\().16b, \t0\().16b eor \x4\().16b, \x4\().16b, \t2\().16b eor \x3\().16b, \x3\().16b, \t1\().16b eor \x1\().16b, \x1\().16b, \t7\().16b eor \x2\().16b, \x2\().16b, \t7\().16b eor \x4\().16b, \x4\().16b, \t6\().16b eor \x5\().16b, \x5\().16b, \t3\().16b eor \x3\().16b, \x3\().16b, \t6\().16b eor \x6\().16b, \x6\().16b, \t4\().16b eor \x4\().16b, \x4\().16b, \t7\().16b eor \x5\().16b, \x5\().16b, \t7\().16b eor \x7\().16b, \x7\().16b, \t5\().16b mix_cols \x0, \x1, \x2, \x3, \x4, \x5, \x6, \x7, \ \t0, \t1, \t2, \t3, \t4, \t5, \t6, \t7, 1 .endm .macro swapmove_2x, a0, b0, a1, b1, n, mask, t0, t1 ushr \t0\().2d, \b0\().2d, #\n ushr \t1\().2d, \b1\().2d, #\n eor \t0\().16b, \t0\().16b, \a0\().16b eor \t1\().16b, \t1\().16b, \a1\().16b and \t0\().16b, \t0\().16b, \mask\().16b and \t1\().16b, \t1\().16b, \mask\().16b eor \a0\().16b, \a0\().16b, \t0\().16b shl \t0\().2d, \t0\().2d, #\n eor \a1\().16b, \a1\().16b, \t1\().16b shl \t1\().2d, \t1\().2d, #\n eor \b0\().16b, \b0\().16b, \t0\().16b eor \b1\().16b, \b1\().16b, \t1\().16b .endm .macro bitslice, x7, x6, x5, x4, x3, x2, x1, x0, t0, t1, t2, t3 movi \t0\().16b, #0x55 movi \t1\().16b, #0x33 swapmove_2x \x0, \x1, \x2, \x3, 1, \t0, \t2, \t3 swapmove_2x \x4, \x5, \x6, \x7, 1, \t0, \t2, \t3 movi \t0\().16b, #0x0f swapmove_2x \x0, \x2, \x1, \x3, 2, \t1, \t2, \t3 swapmove_2x \x4, \x6, \x5, \x7, 2, \t1, \t2, \t3 swapmove_2x \x0, \x4, \x1, \x5, 4, \t0, \t2, \t3 swapmove_2x \x2, \x6, \x3, \x7, 4, \t0, \t2, \t3 .endm .align 6 M0: .octa 0x0004080c0105090d02060a0e03070b0f M0SR: .octa 0x0004080c05090d010a0e02060f03070b SR: .octa 0x0f0e0d0c0a09080b0504070600030201 SRM0: .octa 0x01060b0c0207080d0304090e00050a0f M0ISR: .octa 0x0004080c0d0105090a0e0206070b0f03 ISR: .octa 0x0f0e0d0c080b0a090504070602010003 ISRM0: .octa 0x0306090c00070a0d01040b0e0205080f /* * void aesbs_convert_key(u8 out[], u32 const rk[], int rounds) */ SYM_FUNC_START(aesbs_convert_key) ld1 {v7.4s}, [x1], #16 // load round 0 key ld1 {v17.4s}, [x1], #16 // load round 1 key movi v8.16b, #0x01 // bit masks movi v9.16b, #0x02 movi v10.16b, #0x04 movi v11.16b, #0x08 movi v12.16b, #0x10 movi v13.16b, #0x20 movi v14.16b, #0x40 movi v15.16b, #0x80 ldr q16, M0 sub x2, x2, #1 str q7, [x0], #16 // save round 0 key .Lkey_loop: tbl v7.16b ,{v17.16b}, v16.16b ld1 {v17.4s}, [x1], #16 // load next round key cmtst v0.16b, v7.16b, v8.16b cmtst v1.16b, v7.16b, v9.16b cmtst v2.16b, v7.16b, v10.16b cmtst v3.16b, v7.16b, v11.16b cmtst v4.16b, v7.16b, v12.16b cmtst v5.16b, v7.16b, v13.16b cmtst v6.16b, v7.16b, v14.16b cmtst v7.16b, v7.16b, v15.16b not v0.16b, v0.16b not v1.16b, v1.16b not v5.16b, v5.16b not v6.16b, v6.16b subs x2, x2, #1 stp q0, q1, [x0], #128 stp q2, q3, [x0, #-96] stp q4, q5, [x0, #-64] stp q6, q7, [x0, #-32] b.ne .Lkey_loop movi v7.16b, #0x63 // compose .L63 eor v17.16b, v17.16b, v7.16b str q17, [x0] ret SYM_FUNC_END(aesbs_convert_key) .align 4 SYM_FUNC_START_LOCAL(aesbs_encrypt8) ldr q9, [bskey], #16 // round 0 key ldr q8, M0SR ldr q24, SR eor v10.16b, v0.16b, v9.16b // xor with round0 key eor v11.16b, v1.16b, v9.16b tbl v0.16b, {v10.16b}, v8.16b eor v12.16b, v2.16b, v9.16b tbl v1.16b, {v11.16b}, v8.16b eor v13.16b, v3.16b, v9.16b tbl v2.16b, {v12.16b}, v8.16b eor v14.16b, v4.16b, v9.16b tbl v3.16b, {v13.16b}, v8.16b eor v15.16b, v5.16b, v9.16b tbl v4.16b, {v14.16b}, v8.16b eor v10.16b, v6.16b, v9.16b tbl v5.16b, {v15.16b}, v8.16b eor v11.16b, v7.16b, v9.16b tbl v6.16b, {v10.16b}, v8.16b tbl v7.16b, {v11.16b}, v8.16b bitslice v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11 sub rounds, rounds, #1 b .Lenc_sbox .Lenc_loop: shift_rows v0, v1, v2, v3, v4, v5, v6, v7, v24 .Lenc_sbox: sbox v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, \ v13, v14, v15 subs rounds, rounds, #1 b.cc .Lenc_done enc_next_rk mix_cols v0, v1, v4, v6, v3, v7, v2, v5, v8, v9, v10, v11, v12, \ v13, v14, v15 add_round_key v0, v1, v2, v3, v4, v5, v6, v7 b.ne .Lenc_loop ldr q24, SRM0 b .Lenc_loop .Lenc_done: ldr q12, [bskey] // last round key bitslice v0, v1, v4, v6, v3, v7, v2, v5, v8, v9, v10, v11 eor v0.16b, v0.16b, v12.16b eor v1.16b, v1.16b, v12.16b eor v4.16b, v4.16b, v12.16b eor v6.16b, v6.16b, v12.16b eor v3.16b, v3.16b, v12.16b eor v7.16b, v7.16b, v12.16b eor v2.16b, v2.16b, v12.16b eor v5.16b, v5.16b, v12.16b ret SYM_FUNC_END(aesbs_encrypt8) .align 4 SYM_FUNC_START_LOCAL(aesbs_decrypt8) lsl x9, rounds, #7 add bskey, bskey, x9 ldr q9, [bskey, #-112]! // round 0 key ldr q8, M0ISR ldr q24, ISR eor v10.16b, v0.16b, v9.16b // xor with round0 key eor v11.16b, v1.16b, v9.16b tbl v0.16b, {v10.16b}, v8.16b eor v12.16b, v2.16b, v9.16b tbl v1.16b, {v11.16b}, v8.16b eor v13.16b, v3.16b, v9.16b tbl v2.16b, {v12.16b}, v8.16b eor v14.16b, v4.16b, v9.16b tbl v3.16b, {v13.16b}, v8.16b eor v15.16b, v5.16b, v9.16b tbl v4.16b, {v14.16b}, v8.16b eor v10.16b, v6.16b, v9.16b tbl v5.16b, {v15.16b}, v8.16b eor v11.16b, v7.16b, v9.16b tbl v6.16b, {v10.16b}, v8.16b tbl v7.16b, {v11.16b}, v8.16b bitslice v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11 sub rounds, rounds, #1 b .Ldec_sbox .Ldec_loop: shift_rows v0, v1, v2, v3, v4, v5, v6, v7, v24 .Ldec_sbox: inv_sbox v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, \ v13, v14, v15 subs rounds, rounds, #1 b.cc .Ldec_done dec_next_rk add_round_key v0, v1, v6, v4, v2, v7, v3, v5 inv_mix_cols v0, v1, v6, v4, v2, v7, v3, v5, v8, v9, v10, v11, v12, \ v13, v14, v15 b.ne .Ldec_loop ldr q24, ISRM0 b .Ldec_loop .Ldec_done: ldr q12, [bskey, #-16] // last round key bitslice v0, v1, v6, v4, v2, v7, v3, v5, v8, v9, v10, v11 eor v0.16b, v0.16b, v12.16b eor v1.16b, v1.16b, v12.16b eor v6.16b, v6.16b, v12.16b eor v4.16b, v4.16b, v12.16b eor v2.16b, v2.16b, v12.16b eor v7.16b, v7.16b, v12.16b eor v3.16b, v3.16b, v12.16b eor v5.16b, v5.16b, v12.16b ret SYM_FUNC_END(aesbs_decrypt8) /* * aesbs_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks) * aesbs_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks) */ .macro __ecb_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7 frame_push 5 mov x19, x0 mov x20, x1 mov x21, x2 mov x22, x3 mov x23, x4 99: mov x5, #1 lsl x5, x5, x23 subs w23, w23, #8 csel x23, x23, xzr, pl csel x5, x5, xzr, mi ld1 {v0.16b}, [x20], #16 tbnz x5, #1, 0f ld1 {v1.16b}, [x20], #16 tbnz x5, #2, 0f ld1 {v2.16b}, [x20], #16 tbnz x5, #3, 0f ld1 {v3.16b}, [x20], #16 tbnz x5, #4, 0f ld1 {v4.16b}, [x20], #16 tbnz x5, #5, 0f ld1 {v5.16b}, [x20], #16 tbnz x5, #6, 0f ld1 {v6.16b}, [x20], #16 tbnz x5, #7, 0f ld1 {v7.16b}, [x20], #16 0: mov bskey, x21 mov rounds, x22 bl \do8 st1 {\o0\().16b}, [x19], #16 tbnz x5, #1, 1f st1 {\o1\().16b}, [x19], #16 tbnz x5, #2, 1f st1 {\o2\().16b}, [x19], #16 tbnz x5, #3, 1f st1 {\o3\().16b}, [x19], #16 tbnz x5, #4, 1f st1 {\o4\().16b}, [x19], #16 tbnz x5, #5, 1f st1 {\o5\().16b}, [x19], #16 tbnz x5, #6, 1f st1 {\o6\().16b}, [x19], #16 tbnz x5, #7, 1f st1 {\o7\().16b}, [x19], #16 cbz x23, 1f cond_yield_neon b 99b 1: frame_pop ret .endm .align 4 SYM_FUNC_START(aesbs_ecb_encrypt) __ecb_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5 SYM_FUNC_END(aesbs_ecb_encrypt) .align 4 SYM_FUNC_START(aesbs_ecb_decrypt) __ecb_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5 SYM_FUNC_END(aesbs_ecb_decrypt) /* * aesbs_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks, u8 iv[]) */ .align 4 SYM_FUNC_START(aesbs_cbc_decrypt) frame_push 6 mov x19, x0 mov x20, x1 mov x21, x2 mov x22, x3 mov x23, x4 mov x24, x5 99: mov x6, #1 lsl x6, x6, x23 subs w23, w23, #8 csel x23, x23, xzr, pl csel x6, x6, xzr, mi ld1 {v0.16b}, [x20], #16 mov v25.16b, v0.16b tbnz x6, #1, 0f ld1 {v1.16b}, [x20], #16 mov v26.16b, v1.16b tbnz x6, #2, 0f ld1 {v2.16b}, [x20], #16 mov v27.16b, v2.16b tbnz x6, #3, 0f ld1 {v3.16b}, [x20], #16 mov v28.16b, v3.16b tbnz x6, #4, 0f ld1 {v4.16b}, [x20], #16 mov v29.16b, v4.16b tbnz x6, #5, 0f ld1 {v5.16b}, [x20], #16 mov v30.16b, v5.16b tbnz x6, #6, 0f ld1 {v6.16b}, [x20], #16 mov v31.16b, v6.16b tbnz x6, #7, 0f ld1 {v7.16b}, [x20] 0: mov bskey, x21 mov rounds, x22 bl aesbs_decrypt8 ld1 {v24.16b}, [x24] // load IV eor v1.16b, v1.16b, v25.16b eor v6.16b, v6.16b, v26.16b eor v4.16b, v4.16b, v27.16b eor v2.16b, v2.16b, v28.16b eor v7.16b, v7.16b, v29.16b eor v0.16b, v0.16b, v24.16b eor v3.16b, v3.16b, v30.16b eor v5.16b, v5.16b, v31.16b st1 {v0.16b}, [x19], #16 mov v24.16b, v25.16b tbnz x6, #1, 1f st1 {v1.16b}, [x19], #16 mov v24.16b, v26.16b tbnz x6, #2, 1f st1 {v6.16b}, [x19], #16 mov v24.16b, v27.16b tbnz x6, #3, 1f st1 {v4.16b}, [x19], #16 mov v24.16b, v28.16b tbnz x6, #4, 1f st1 {v2.16b}, [x19], #16 mov v24.16b, v29.16b tbnz x6, #5, 1f st1 {v7.16b}, [x19], #16 mov v24.16b, v30.16b tbnz x6, #6, 1f st1 {v3.16b}, [x19], #16 mov v24.16b, v31.16b tbnz x6, #7, 1f ld1 {v24.16b}, [x20], #16 st1 {v5.16b}, [x19], #16 1: st1 {v24.16b}, [x24] // store IV cbz x23, 2f cond_yield_neon b 99b 2: frame_pop ret SYM_FUNC_END(aesbs_cbc_decrypt) .macro next_tweak, out, in, const, tmp sshr \tmp\().2d, \in\().2d, #63 and \tmp\().16b, \tmp\().16b, \const\().16b add \out\().2d, \in\().2d, \in\().2d ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8 eor \out\().16b, \out\().16b, \tmp\().16b .endm /* * aesbs_xts_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks, u8 iv[]) * aesbs_xts_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, * int blocks, u8 iv[]) */ SYM_FUNC_START_LOCAL(__xts_crypt8) mov x6, #1 lsl x6, x6, x23 subs w23, w23, #8 csel x23, x23, xzr, pl csel x6, x6, xzr, mi ld1 {v0.16b}, [x20], #16 next_tweak v26, v25, v30, v31 eor v0.16b, v0.16b, v25.16b tbnz x6, #1, 0f ld1 {v1.16b}, [x20], #16 next_tweak v27, v26, v30, v31 eor v1.16b, v1.16b, v26.16b tbnz x6, #2, 0f ld1 {v2.16b}, [x20], #16 next_tweak v28, v27, v30, v31 eor v2.16b, v2.16b, v27.16b tbnz x6, #3, 0f ld1 {v3.16b}, [x20], #16 next_tweak v29, v28, v30, v31 eor v3.16b, v3.16b, v28.16b tbnz x6, #4, 0f ld1 {v4.16b}, [x20], #16 str q29, [sp, #.Lframe_local_offset] eor v4.16b, v4.16b, v29.16b next_tweak v29, v29, v30, v31 tbnz x6, #5, 0f ld1 {v5.16b}, [x20], #16 str q29, [sp, #.Lframe_local_offset + 16] eor v5.16b, v5.16b, v29.16b next_tweak v29, v29, v30, v31 tbnz x6, #6, 0f ld1 {v6.16b}, [x20], #16 str q29, [sp, #.Lframe_local_offset + 32] eor v6.16b, v6.16b, v29.16b next_tweak v29, v29, v30, v31 tbnz x6, #7, 0f ld1 {v7.16b}, [x20], #16 str q29, [sp, #.Lframe_local_offset + 48] eor v7.16b, v7.16b, v29.16b next_tweak v29, v29, v30, v31 0: mov bskey, x21 mov rounds, x22 br x7 SYM_FUNC_END(__xts_crypt8) .macro __xts_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7 frame_push 6, 64 mov x19, x0 mov x20, x1 mov x21, x2 mov x22, x3 mov x23, x4 mov x24, x5 0: movi v30.2s, #0x1 movi v25.2s, #0x87 uzp1 v30.4s, v30.4s, v25.4s ld1 {v25.16b}, [x24] 99: adr x7, \do8 bl __xts_crypt8 ldp q16, q17, [sp, #.Lframe_local_offset] ldp q18, q19, [sp, #.Lframe_local_offset + 32] eor \o0\().16b, \o0\().16b, v25.16b eor \o1\().16b, \o1\().16b, v26.16b eor \o2\().16b, \o2\().16b, v27.16b eor \o3\().16b, \o3\().16b, v28.16b st1 {\o0\().16b}, [x19], #16 mov v25.16b, v26.16b tbnz x6, #1, 1f st1 {\o1\().16b}, [x19], #16 mov v25.16b, v27.16b tbnz x6, #2, 1f st1 {\o2\().16b}, [x19], #16 mov v25.16b, v28.16b tbnz x6, #3, 1f st1 {\o3\().16b}, [x19], #16 mov v25.16b, v29.16b tbnz x6, #4, 1f eor \o4\().16b, \o4\().16b, v16.16b eor \o5\().16b, \o5\().16b, v17.16b eor \o6\().16b, \o6\().16b, v18.16b eor \o7\().16b, \o7\().16b, v19.16b st1 {\o4\().16b}, [x19], #16 tbnz x6, #5, 1f st1 {\o5\().16b}, [x19], #16 tbnz x6, #6, 1f st1 {\o6\().16b}, [x19], #16 tbnz x6, #7, 1f st1 {\o7\().16b}, [x19], #16 cbz x23, 1f st1 {v25.16b}, [x24] cond_yield_neon 0b b 99b 1: st1 {v25.16b}, [x24] frame_pop ret .endm SYM_FUNC_START(aesbs_xts_encrypt) __xts_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5 SYM_FUNC_END(aesbs_xts_encrypt) SYM_FUNC_START(aesbs_xts_decrypt) __xts_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5 SYM_FUNC_END(aesbs_xts_decrypt) .macro next_ctr, v mov \v\().d[1], x8 adds x8, x8, #1 mov \v\().d[0], x7 adc x7, x7, xzr rev64 \v\().16b, \v\().16b .endm /* * aesbs_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], * int rounds, int blocks, u8 iv[], u8 final[]) */ SYM_FUNC_START(aesbs_ctr_encrypt) frame_push 8 mov x19, x0 mov x20, x1 mov x21, x2 mov x22, x3 mov x23, x4 mov x24, x5 mov x25, x6 cmp x25, #0 cset x26, ne add x23, x23, x26 // do one extra block if final 98: ldp x7, x8, [x24] ld1 {v0.16b}, [x24] CPU_LE( rev x7, x7 ) CPU_LE( rev x8, x8 ) adds x8, x8, #1 adc x7, x7, xzr 99: mov x9, #1 lsl x9, x9, x23 subs w23, w23, #8 csel x23, x23, xzr, pl csel x9, x9, xzr, le tbnz x9, #1, 0f next_ctr v1 tbnz x9, #2, 0f next_ctr v2 tbnz x9, #3, 0f next_ctr v3 tbnz x9, #4, 0f next_ctr v4 tbnz x9, #5, 0f next_ctr v5 tbnz x9, #6, 0f next_ctr v6 tbnz x9, #7, 0f next_ctr v7 0: mov bskey, x21 mov rounds, x22 bl aesbs_encrypt8 lsr x9, x9, x26 // disregard the extra block tbnz x9, #0, 0f ld1 {v8.16b}, [x20], #16 eor v0.16b, v0.16b, v8.16b st1 {v0.16b}, [x19], #16 tbnz x9, #1, 1f ld1 {v9.16b}, [x20], #16 eor v1.16b, v1.16b, v9.16b st1 {v1.16b}, [x19], #16 tbnz x9, #2, 2f ld1 {v10.16b}, [x20], #16 eor v4.16b, v4.16b, v10.16b st1 {v4.16b}, [x19], #16 tbnz x9, #3, 3f ld1 {v11.16b}, [x20], #16 eor v6.16b, v6.16b, v11.16b st1 {v6.16b}, [x19], #16 tbnz x9, #4, 4f ld1 {v12.16b}, [x20], #16 eor v3.16b, v3.16b, v12.16b st1 {v3.16b}, [x19], #16 tbnz x9, #5, 5f ld1 {v13.16b}, [x20], #16 eor v7.16b, v7.16b, v13.16b st1 {v7.16b}, [x19], #16 tbnz x9, #6, 6f ld1 {v14.16b}, [x20], #16 eor v2.16b, v2.16b, v14.16b st1 {v2.16b}, [x19], #16 tbnz x9, #7, 7f ld1 {v15.16b}, [x20], #16 eor v5.16b, v5.16b, v15.16b st1 {v5.16b}, [x19], #16 8: next_ctr v0 st1 {v0.16b}, [x24] cbz x23, .Lctr_done cond_yield_neon 98b b 99b .Lctr_done: frame_pop ret /* * If we are handling the tail of the input (x6 != NULL), return the * final keystream block back to the caller. */ 0: cbz x25, 8b st1 {v0.16b}, [x25] b 8b 1: cbz x25, 8b st1 {v1.16b}, [x25] b 8b 2: cbz x25, 8b st1 {v4.16b}, [x25] b 8b 3: cbz x25, 8b st1 {v6.16b}, [x25] b 8b 4: cbz x25, 8b st1 {v3.16b}, [x25] b 8b 5: cbz x25, 8b st1 {v7.16b}, [x25] b 8b 6: cbz x25, 8b st1 {v2.16b}, [x25] b 8b 7: cbz x25, 8b st1 {v5.16b}, [x25] b 8b SYM_FUNC_END(aesbs_ctr_encrypt) |