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Diffstat (limited to 'arch/arm64/crypto/speck-neon-core.S')
| -rw-r--r-- | arch/arm64/crypto/speck-neon-core.S | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/arch/arm64/crypto/speck-neon-core.S b/arch/arm64/crypto/speck-neon-core.S deleted file mode 100644 index b14463438b09..000000000000 --- a/arch/arm64/crypto/speck-neon-core.S +++ /dev/null @@ -1,352 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * ARM64 NEON-accelerated implementation of Speck128-XTS and Speck64-XTS - * - * Copyright (c) 2018 Google, Inc - * - * Author: Eric Biggers <ebiggers@google.com> - */ - -#include <linux/linkage.h> - - .text - - // arguments - ROUND_KEYS .req x0 // const {u64,u32} *round_keys - NROUNDS .req w1 // int nrounds - NROUNDS_X .req x1 - DST .req x2 // void *dst - SRC .req x3 // const void *src - NBYTES .req w4 // unsigned int nbytes - TWEAK .req x5 // void *tweak - - // registers which hold the data being encrypted/decrypted - // (underscores avoid a naming collision with ARM64 registers x0-x3) - X_0 .req v0 - Y_0 .req v1 - X_1 .req v2 - Y_1 .req v3 - X_2 .req v4 - Y_2 .req v5 - X_3 .req v6 - Y_3 .req v7 - - // the round key, duplicated in all lanes - ROUND_KEY .req v8 - - // index vector for tbl-based 8-bit rotates - ROTATE_TABLE .req v9 - ROTATE_TABLE_Q .req q9 - - // temporary registers - TMP0 .req v10 - TMP1 .req v11 - TMP2 .req v12 - TMP3 .req v13 - - // multiplication table for updating XTS tweaks - GFMUL_TABLE .req v14 - GFMUL_TABLE_Q .req q14 - - // next XTS tweak value(s) - TWEAKV_NEXT .req v15 - - // XTS tweaks for the blocks currently being encrypted/decrypted - TWEAKV0 .req v16 - TWEAKV1 .req v17 - TWEAKV2 .req v18 - TWEAKV3 .req v19 - TWEAKV4 .req v20 - TWEAKV5 .req v21 - TWEAKV6 .req v22 - TWEAKV7 .req v23 - - .align 4 -.Lror64_8_table: - .octa 0x080f0e0d0c0b0a090007060504030201 -.Lror32_8_table: - .octa 0x0c0f0e0d080b0a090407060500030201 -.Lrol64_8_table: - .octa 0x0e0d0c0b0a09080f0605040302010007 -.Lrol32_8_table: - .octa 0x0e0d0c0f0a09080b0605040702010003 -.Lgf128mul_table: - .octa 0x00000000000000870000000000000001 -.Lgf64mul_table: - .octa 0x0000000000000000000000002d361b00 - -/* - * _speck_round_128bytes() - Speck encryption round on 128 bytes at a time - * - * Do one Speck encryption round on the 128 bytes (8 blocks for Speck128, 16 for - * Speck64) stored in X0-X3 and Y0-Y3, using the round key stored in all lanes - * of ROUND_KEY. 'n' is the lane size: 64 for Speck128, or 32 for Speck64. - * 'lanes' is the lane specifier: "2d" for Speck128 or "4s" for Speck64. - */ -.macro _speck_round_128bytes n, lanes - - // x = ror(x, 8) - tbl X_0.16b, {X_0.16b}, ROTATE_TABLE.16b - tbl X_1.16b, {X_1.16b}, ROTATE_TABLE.16b - tbl X_2.16b, {X_2.16b}, ROTATE_TABLE.16b - tbl X_3.16b, {X_3.16b}, ROTATE_TABLE.16b - - // x += y - add X_0.\lanes, X_0.\lanes, Y_0.\lanes - add X_1.\lanes, X_1.\lanes, Y_1.\lanes - add X_2.\lanes, X_2.\lanes, Y_2.\lanes - add X_3.\lanes, X_3.\lanes, Y_3.\lanes - - // x ^= k - eor X_0.16b, X_0.16b, ROUND_KEY.16b - eor X_1.16b, X_1.16b, ROUND_KEY.16b - eor X_2.16b, X_2.16b, ROUND_KEY.16b - eor X_3.16b, X_3.16b, ROUND_KEY.16b - - // y = rol(y, 3) - shl TMP0.\lanes, Y_0.\lanes, #3 - shl TMP1.\lanes, Y_1.\lanes, #3 - shl TMP2.\lanes, Y_2.\lanes, #3 - shl TMP3.\lanes, Y_3.\lanes, #3 - sri TMP0.\lanes, Y_0.\lanes, #(\n - 3) - sri TMP1.\lanes, Y_1.\lanes, #(\n - 3) - sri TMP2.\lanes, Y_2.\lanes, #(\n - 3) - sri TMP3.\lanes, Y_3.\lanes, #(\n - 3) - - // y ^= x - eor Y_0.16b, TMP0.16b, X_0.16b - eor Y_1.16b, TMP1.16b, X_1.16b - eor Y_2.16b, TMP2.16b, X_2.16b - eor Y_3.16b, TMP3.16b, X_3.16b -.endm - -/* - * _speck_unround_128bytes() - Speck decryption round on 128 bytes at a time - * - * This is the inverse of _speck_round_128bytes(). - */ -.macro _speck_unround_128bytes n, lanes - - // y ^= x - eor TMP0.16b, Y_0.16b, X_0.16b - eor TMP1.16b, Y_1.16b, X_1.16b - eor TMP2.16b, Y_2.16b, X_2.16b - eor TMP3.16b, Y_3.16b, X_3.16b - - // y = ror(y, 3) - ushr Y_0.\lanes, TMP0.\lanes, #3 - ushr Y_1.\lanes, TMP1.\lanes, #3 - ushr Y_2.\lanes, TMP2.\lanes, #3 - ushr Y_3.\lanes, TMP3.\lanes, #3 - sli Y_0.\lanes, TMP0.\lanes, #(\n - 3) - sli Y_1.\lanes, TMP1.\lanes, #(\n - 3) - sli Y_2.\lanes, TMP2.\lanes, #(\n - 3) - sli Y_3.\lanes, TMP3.\lanes, #(\n - 3) - - // x ^= k - eor X_0.16b, X_0.16b, ROUND_KEY.16b - eor X_1.16b, X_1.16b, ROUND_KEY.16b - eor X_2.16b, X_2.16b, ROUND_KEY.16b - eor X_3.16b, X_3.16b, ROUND_KEY.16b - - // x -= y - sub X_0.\lanes, X_0.\lanes, Y_0.\lanes - sub X_1.\lanes, X_1.\lanes, Y_1.\lanes - sub X_2.\lanes, X_2.\lanes, Y_2.\lanes - sub X_3.\lanes, X_3.\lanes, Y_3.\lanes - - // x = rol(x, 8) - tbl X_0.16b, {X_0.16b}, ROTATE_TABLE.16b - tbl X_1.16b, {X_1.16b}, ROTATE_TABLE.16b - tbl X_2.16b, {X_2.16b}, ROTATE_TABLE.16b - tbl X_3.16b, {X_3.16b}, ROTATE_TABLE.16b -.endm - -.macro _next_xts_tweak next, cur, tmp, n -.if \n == 64 - /* - * Calculate the next tweak by multiplying the current one by x, - * modulo p(x) = x^128 + x^7 + x^2 + x + 1. - */ - sshr \tmp\().2d, \cur\().2d, #63 - and \tmp\().16b, \tmp\().16b, GFMUL_TABLE.16b - shl \next\().2d, \cur\().2d, #1 - ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8 - eor \next\().16b, \next\().16b, \tmp\().16b -.else - /* - * Calculate the next two tweaks by multiplying the current ones by x^2, - * modulo p(x) = x^64 + x^4 + x^3 + x + 1. - */ - ushr \tmp\().2d, \cur\().2d, #62 - shl \next\().2d, \cur\().2d, #2 - tbl \tmp\().16b, {GFMUL_TABLE.16b}, \tmp\().16b - eor \next\().16b, \next\().16b, \tmp\().16b -.endif -.endm - -/* - * _speck_xts_crypt() - Speck-XTS encryption/decryption - * - * Encrypt or decrypt NBYTES bytes of data from the SRC buffer to the DST buffer - * using Speck-XTS, specifically the variant with a block size of '2n' and round - * count given by NROUNDS. The expanded round keys are given in ROUND_KEYS, and - * the current XTS tweak value is given in TWEAK. It's assumed that NBYTES is a - * nonzero multiple of 128. - */ -.macro _speck_xts_crypt n, lanes, decrypting - - /* - * If decrypting, modify the ROUND_KEYS parameter to point to the last - * round key rather than the first, since for decryption the round keys - * are used in reverse order. - */ -.if \decrypting - mov NROUNDS, NROUNDS /* zero the high 32 bits */ -.if \n == 64 - add ROUND_KEYS, ROUND_KEYS, NROUNDS_X, lsl #3 - sub ROUND_KEYS, ROUND_KEYS, #8 -.else - add ROUND_KEYS, ROUND_KEYS, NROUNDS_X, lsl #2 - sub ROUND_KEYS, ROUND_KEYS, #4 -.endif -.endif - - // Load the index vector for tbl-based 8-bit rotates -.if \decrypting - ldr ROTATE_TABLE_Q, .Lrol\n\()_8_table -.else - ldr ROTATE_TABLE_Q, .Lror\n\()_8_table -.endif - - // One-time XTS preparation -.if \n == 64 - // Load first tweak - ld1 {TWEAKV0.16b}, [TWEAK] - - // Load GF(2^128) multiplication table - ldr GFMUL_TABLE_Q, .Lgf128mul_table -.else - // Load first tweak - ld1 {TWEAKV0.8b}, [TWEAK] - - // Load GF(2^64) multiplication table - ldr GFMUL_TABLE_Q, .Lgf64mul_table - - // Calculate second tweak, packing it together with the first - ushr TMP0.2d, TWEAKV0.2d, #63 - shl TMP1.2d, TWEAKV0.2d, #1 - tbl TMP0.8b, {GFMUL_TABLE.16b}, TMP0.8b - eor TMP0.8b, TMP0.8b, TMP1.8b - mov TWEAKV0.d[1], TMP0.d[0] -.endif - -.Lnext_128bytes_\@: - - // Calculate XTS tweaks for next 128 bytes - _next_xts_tweak TWEAKV1, TWEAKV0, TMP0, \n - _next_xts_tweak TWEAKV2, TWEAKV1, TMP0, \n - _next_xts_tweak TWEAKV3, TWEAKV2, TMP0, \n - _next_xts_tweak TWEAKV4, TWEAKV3, TMP0, \n - _next_xts_tweak TWEAKV5, TWEAKV4, TMP0, \n - _next_xts_tweak TWEAKV6, TWEAKV5, TMP0, \n - _next_xts_tweak TWEAKV7, TWEAKV6, TMP0, \n - _next_xts_tweak TWEAKV_NEXT, TWEAKV7, TMP0, \n - - // Load the next source blocks into {X,Y}[0-3] - ld1 {X_0.16b-Y_1.16b}, [SRC], #64 - ld1 {X_2.16b-Y_3.16b}, [SRC], #64 - - // XOR the source blocks with their XTS tweaks - eor TMP0.16b, X_0.16b, TWEAKV0.16b - eor Y_0.16b, Y_0.16b, TWEAKV1.16b - eor TMP1.16b, X_1.16b, TWEAKV2.16b - eor Y_1.16b, Y_1.16b, TWEAKV3.16b - eor TMP2.16b, X_2.16b, TWEAKV4.16b - eor Y_2.16b, Y_2.16b, TWEAKV5.16b - eor TMP3.16b, X_3.16b, TWEAKV6.16b - eor Y_3.16b, Y_3.16b, TWEAKV7.16b - - /* - * De-interleave the 'x' and 'y' elements of each block, i.e. make it so - * that the X[0-3] registers contain only the second halves of blocks, - * and the Y[0-3] registers contain only the first halves of blocks. - * (Speck uses the order (y, x) rather than the more intuitive (x, y).) - */ - uzp2 X_0.\lanes, TMP0.\lanes, Y_0.\lanes - uzp1 Y_0.\lanes, TMP0.\lanes, Y_0.\lanes - uzp2 X_1.\lanes, TMP1.\lanes, Y_1.\lanes - uzp1 Y_1.\lanes, TMP1.\lanes, Y_1.\lanes - uzp2 X_2.\lanes, TMP2.\lanes, Y_2.\lanes - uzp1 Y_2.\lanes, TMP2.\lanes, Y_2.\lanes - uzp2 X_3.\lanes, TMP3.\lanes, Y_3.\lanes - uzp1 Y_3.\lanes, TMP3.\lanes, Y_3.\lanes - - // Do the cipher rounds - mov x6, ROUND_KEYS - mov w7, NROUNDS -.Lnext_round_\@: -.if \decrypting - ld1r {ROUND_KEY.\lanes}, [x6] - sub x6, x6, #( \n / 8 ) - _speck_unround_128bytes \n, \lanes -.else - ld1r {ROUND_KEY.\lanes}, [x6], #( \n / 8 ) - _speck_round_128bytes \n, \lanes -.endif - subs w7, w7, #1 - bne .Lnext_round_\@ - - // Re-interleave the 'x' and 'y' elements of each block - zip1 TMP0.\lanes, Y_0.\lanes, X_0.\lanes - zip2 Y_0.\lanes, Y_0.\lanes, X_0.\lanes - zip1 TMP1.\lanes, Y_1.\lanes, X_1.\lanes - zip2 Y_1.\lanes, Y_1.\lanes, X_1.\lanes - zip1 TMP2.\lanes, Y_2.\lanes, X_2.\lanes - zip2 Y_2.\lanes, Y_2.\lanes, X_2.\lanes - zip1 TMP3.\lanes, Y_3.\lanes, X_3.\lanes - zip2 Y_3.\lanes, Y_3.\lanes, X_3.\lanes - - // XOR the encrypted/decrypted blocks with the tweaks calculated earlier - eor X_0.16b, TMP0.16b, TWEAKV0.16b - eor Y_0.16b, Y_0.16b, TWEAKV1.16b - eor X_1.16b, TMP1.16b, TWEAKV2.16b - eor Y_1.16b, Y_1.16b, TWEAKV3.16b - eor X_2.16b, TMP2.16b, TWEAKV4.16b - eor Y_2.16b, Y_2.16b, TWEAKV5.16b - eor X_3.16b, TMP3.16b, TWEAKV6.16b - eor Y_3.16b, Y_3.16b, TWEAKV7.16b - mov TWEAKV0.16b, TWEAKV_NEXT.16b - - // Store the ciphertext in the destination buffer - st1 {X_0.16b-Y_1.16b}, [DST], #64 - st1 {X_2.16b-Y_3.16b}, [DST], #64 - - // Continue if there are more 128-byte chunks remaining - subs NBYTES, NBYTES, #128 - bne .Lnext_128bytes_\@ - - // Store the next tweak and return -.if \n == 64 - st1 {TWEAKV_NEXT.16b}, [TWEAK] -.else - st1 {TWEAKV_NEXT.8b}, [TWEAK] -.endif - ret -.endm - -ENTRY(speck128_xts_encrypt_neon) - _speck_xts_crypt n=64, lanes=2d, decrypting=0 -ENDPROC(speck128_xts_encrypt_neon) - -ENTRY(speck128_xts_decrypt_neon) - _speck_xts_crypt n=64, lanes=2d, decrypting=1 -ENDPROC(speck128_xts_decrypt_neon) - -ENTRY(speck64_xts_encrypt_neon) - _speck_xts_crypt n=32, lanes=4s, decrypting=0 -ENDPROC(speck64_xts_encrypt_neon) - -ENTRY(speck64_xts_decrypt_neon) - _speck_xts_crypt n=32, lanes=4s, decrypting=1 -ENDPROC(speck64_xts_decrypt_neon) |