--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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
+ .fpu neon
+
+ // arguments
+ ROUND_KEYS .req r0 // const {u64,u32} *round_keys
+ NROUNDS .req r1 // int nrounds
+ DST .req r2 // void *dst
+ SRC .req r3 // const void *src
+ NBYTES .req r4 // unsigned int nbytes
+ TWEAK .req r5 // void *tweak
+
+ // registers which hold the data being encrypted/decrypted
+ X0 .req q0
+ X0_L .req d0
+ X0_H .req d1
+ Y0 .req q1
+ Y0_H .req d3
+ X1 .req q2
+ X1_L .req d4
+ X1_H .req d5
+ Y1 .req q3
+ Y1_H .req d7
+ X2 .req q4
+ X2_L .req d8
+ X2_H .req d9
+ Y2 .req q5
+ Y2_H .req d11
+ X3 .req q6
+ X3_L .req d12
+ X3_H .req d13
+ Y3 .req q7
+ Y3_H .req d15
+
+ // the round key, duplicated in all lanes
+ ROUND_KEY .req q8
+ ROUND_KEY_L .req d16
+ ROUND_KEY_H .req d17
+
+ // index vector for vtbl-based 8-bit rotates
+ ROTATE_TABLE .req d18
+
+ // multiplication table for updating XTS tweaks
+ GF128MUL_TABLE .req d19
+ GF64MUL_TABLE .req d19
+
+ // current XTS tweak value(s)
+ TWEAKV .req q10
+ TWEAKV_L .req d20
+ TWEAKV_H .req d21
+
+ TMP0 .req q12
+ TMP0_L .req d24
+ TMP0_H .req d25
+ TMP1 .req q13
+ TMP2 .req q14
+ TMP3 .req q15
+
+ .align 4
+.Lror64_8_table:
+ .byte 1, 2, 3, 4, 5, 6, 7, 0
+.Lror32_8_table:
+ .byte 1, 2, 3, 0, 5, 6, 7, 4
+.Lrol64_8_table:
+ .byte 7, 0, 1, 2, 3, 4, 5, 6
+.Lrol32_8_table:
+ .byte 3, 0, 1, 2, 7, 4, 5, 6
+.Lgf128mul_table:
+ .byte 0, 0x87
+ .fill 14
+.Lgf64mul_table:
+ .byte 0, 0x1b, (0x1b << 1), (0x1b << 1) ^ 0x1b
+ .fill 12
+
+/*
+ * _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.
+ *
+ * The 8-bit rotates are implemented using vtbl instead of vshr + vsli because
+ * the vtbl approach is faster on some processors and the same speed on others.
+ */
+.macro _speck_round_128bytes n
+
+ // x = ror(x, 8)
+ vtbl.8 X0_L, {X0_L}, ROTATE_TABLE
+ vtbl.8 X0_H, {X0_H}, ROTATE_TABLE
+ vtbl.8 X1_L, {X1_L}, ROTATE_TABLE
+ vtbl.8 X1_H, {X1_H}, ROTATE_TABLE
+ vtbl.8 X2_L, {X2_L}, ROTATE_TABLE
+ vtbl.8 X2_H, {X2_H}, ROTATE_TABLE
+ vtbl.8 X3_L, {X3_L}, ROTATE_TABLE
+ vtbl.8 X3_H, {X3_H}, ROTATE_TABLE
+
+ // x += y
+ vadd.u\n X0, Y0
+ vadd.u\n X1, Y1
+ vadd.u\n X2, Y2
+ vadd.u\n X3, Y3
+
+ // x ^= k
+ veor X0, ROUND_KEY
+ veor X1, ROUND_KEY
+ veor X2, ROUND_KEY
+ veor X3, ROUND_KEY
+
+ // y = rol(y, 3)
+ vshl.u\n TMP0, Y0, #3
+ vshl.u\n TMP1, Y1, #3
+ vshl.u\n TMP2, Y2, #3
+ vshl.u\n TMP3, Y3, #3
+ vsri.u\n TMP0, Y0, #(\n - 3)
+ vsri.u\n TMP1, Y1, #(\n - 3)
+ vsri.u\n TMP2, Y2, #(\n - 3)
+ vsri.u\n TMP3, Y3, #(\n - 3)
+
+ // y ^= x
+ veor Y0, TMP0, X0
+ veor Y1, TMP1, X1
+ veor Y2, TMP2, X2
+ veor Y3, TMP3, X3
+.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
+
+ // y ^= x
+ veor TMP0, Y0, X0
+ veor TMP1, Y1, X1
+ veor TMP2, Y2, X2
+ veor TMP3, Y3, X3
+
+ // y = ror(y, 3)
+ vshr.u\n Y0, TMP0, #3
+ vshr.u\n Y1, TMP1, #3
+ vshr.u\n Y2, TMP2, #3
+ vshr.u\n Y3, TMP3, #3
+ vsli.u\n Y0, TMP0, #(\n - 3)
+ vsli.u\n Y1, TMP1, #(\n - 3)
+ vsli.u\n Y2, TMP2, #(\n - 3)
+ vsli.u\n Y3, TMP3, #(\n - 3)
+
+ // x ^= k
+ veor X0, ROUND_KEY
+ veor X1, ROUND_KEY
+ veor X2, ROUND_KEY
+ veor X3, ROUND_KEY
+
+ // x -= y
+ vsub.u\n X0, Y0
+ vsub.u\n X1, Y1
+ vsub.u\n X2, Y2
+ vsub.u\n X3, Y3
+
+ // x = rol(x, 8);
+ vtbl.8 X0_L, {X0_L}, ROTATE_TABLE
+ vtbl.8 X0_H, {X0_H}, ROTATE_TABLE
+ vtbl.8 X1_L, {X1_L}, ROTATE_TABLE
+ vtbl.8 X1_H, {X1_H}, ROTATE_TABLE
+ vtbl.8 X2_L, {X2_L}, ROTATE_TABLE
+ vtbl.8 X2_H, {X2_H}, ROTATE_TABLE
+ vtbl.8 X3_L, {X3_L}, ROTATE_TABLE
+ vtbl.8 X3_H, {X3_H}, ROTATE_TABLE
+.endm
+
+.macro _xts128_precrypt_one dst_reg, tweak_buf, tmp
+
+ // Load the next source block
+ vld1.8 {\dst_reg}, [SRC]!
+
+ // Save the current tweak in the tweak buffer
+ vst1.8 {TWEAKV}, [\tweak_buf:128]!
+
+ // XOR the next source block with the current tweak
+ veor \dst_reg, TWEAKV
+
+ /*
+ * Calculate the next tweak by multiplying the current one by x,
+ * modulo p(x) = x^128 + x^7 + x^2 + x + 1.
+ */
+ vshr.u64 \tmp, TWEAKV, #63
+ vshl.u64 TWEAKV, #1
+ veor TWEAKV_H, \tmp\()_L
+ vtbl.8 \tmp\()_H, {GF128MUL_TABLE}, \tmp\()_H
+ veor TWEAKV_L, \tmp\()_H
+.endm
+
+.macro _xts64_precrypt_two dst_reg, tweak_buf, tmp
+
+ // Load the next two source blocks
+ vld1.8 {\dst_reg}, [SRC]!
+
+ // Save the current two tweaks in the tweak buffer
+ vst1.8 {TWEAKV}, [\tweak_buf:128]!
+
+ // XOR the next two source blocks with the current two tweaks
+ veor \dst_reg, TWEAKV
+
+ /*
+ * Calculate the next two tweaks by multiplying the current ones by x^2,
+ * modulo p(x) = x^64 + x^4 + x^3 + x + 1.
+ */
+ vshr.u64 \tmp, TWEAKV, #62
+ vshl.u64 TWEAKV, #2
+ vtbl.8 \tmp\()_L, {GF64MUL_TABLE}, \tmp\()_L
+ vtbl.8 \tmp\()_H, {GF64MUL_TABLE}, \tmp\()_H
+ veor TWEAKV, \tmp
+.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, decrypting
+ push {r4-r7}
+ mov r7, sp
+
+ /*
+ * The first four parameters were passed in registers r0-r3. Load the
+ * additional parameters, which were passed on the stack.
+ */
+ ldr NBYTES, [sp, #16]
+ ldr TWEAK, [sp, #20]
+
+ /*
+ * 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
+.if \n == 64
+ add ROUND_KEYS, ROUND_KEYS, NROUNDS, lsl #3
+ sub ROUND_KEYS, #8
+.else
+ add ROUND_KEYS, ROUND_KEYS, NROUNDS, lsl #2
+ sub ROUND_KEYS, #4
+.endif
+.endif
+
+ // Load the index vector for vtbl-based 8-bit rotates
+.if \decrypting
+ ldr r12, =.Lrol\n\()_8_table
+.else
+ ldr r12, =.Lror\n\()_8_table
+.endif
+ vld1.8 {ROTATE_TABLE}, [r12:64]
+
+ // One-time XTS preparation
+
+ /*
+ * Allocate stack space to store 128 bytes worth of tweaks. For
+ * performance, this space is aligned to a 16-byte boundary so that we
+ * can use the load/store instructions that declare 16-byte alignment.
+ */
+ sub sp, #128
+ bic sp, #0xf
+
+.if \n == 64
+ // Load first tweak
+ vld1.8 {TWEAKV}, [TWEAK]
+
+ // Load GF(2^128) multiplication table
+ ldr r12, =.Lgf128mul_table
+ vld1.8 {GF128MUL_TABLE}, [r12:64]
+.else
+ // Load first tweak
+ vld1.8 {TWEAKV_L}, [TWEAK]
+
+ // Load GF(2^64) multiplication table
+ ldr r12, =.Lgf64mul_table
+ vld1.8 {GF64MUL_TABLE}, [r12:64]
+
+ // Calculate second tweak, packing it together with the first
+ vshr.u64 TMP0_L, TWEAKV_L, #63
+ vtbl.u8 TMP0_L, {GF64MUL_TABLE}, TMP0_L
+ vshl.u64 TWEAKV_H, TWEAKV_L, #1
+ veor TWEAKV_H, TMP0_L
+.endif
+
+.Lnext_128bytes_\@:
+
+ /*
+ * Load the source blocks into {X,Y}[0-3], XOR them with their XTS tweak
+ * values, and save the tweaks on the stack for later. Then
+ * 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).)
+ */
+ mov r12, sp
+.if \n == 64
+ _xts128_precrypt_one X0, r12, TMP0
+ _xts128_precrypt_one Y0, r12, TMP0
+ _xts128_precrypt_one X1, r12, TMP0
+ _xts128_precrypt_one Y1, r12, TMP0
+ _xts128_precrypt_one X2, r12, TMP0
+ _xts128_precrypt_one Y2, r12, TMP0
+ _xts128_precrypt_one X3, r12, TMP0
+ _xts128_precrypt_one Y3, r12, TMP0
+ vswp X0_L, Y0_H
+ vswp X1_L, Y1_H
+ vswp X2_L, Y2_H
+ vswp X3_L, Y3_H
+.else
+ _xts64_precrypt_two X0, r12, TMP0
+ _xts64_precrypt_two Y0, r12, TMP0
+ _xts64_precrypt_two X1, r12, TMP0
+ _xts64_precrypt_two Y1, r12, TMP0
+ _xts64_precrypt_two X2, r12, TMP0
+ _xts64_precrypt_two Y2, r12, TMP0
+ _xts64_precrypt_two X3, r12, TMP0
+ _xts64_precrypt_two Y3, r12, TMP0
+ vuzp.32 Y0, X0
+ vuzp.32 Y1, X1
+ vuzp.32 Y2, X2
+ vuzp.32 Y3, X3
+.endif
+
+ // Do the cipher rounds
+
+ mov r12, ROUND_KEYS
+ mov r6, NROUNDS
+
+.Lnext_round_\@:
+.if \decrypting
+.if \n == 64
+ vld1.64 ROUND_KEY_L, [r12]
+ sub r12, #8
+ vmov ROUND_KEY_H, ROUND_KEY_L
+.else
+ vld1.32 {ROUND_KEY_L[],ROUND_KEY_H[]}, [r12]
+ sub r12, #4
+.endif
+ _speck_unround_128bytes \n
+.else
+.if \n == 64
+ vld1.64 ROUND_KEY_L, [r12]!
+ vmov ROUND_KEY_H, ROUND_KEY_L
+.else
+ vld1.32 {ROUND_KEY_L[],ROUND_KEY_H[]}, [r12]!
+.endif
+ _speck_round_128bytes \n
+.endif
+ subs r6, r6, #1
+ bne .Lnext_round_\@
+
+ // Re-interleave the 'x' and 'y' elements of each block
+.if \n == 64
+ vswp X0_L, Y0_H
+ vswp X1_L, Y1_H
+ vswp X2_L, Y2_H
+ vswp X3_L, Y3_H
+.else
+ vzip.32 Y0, X0
+ vzip.32 Y1, X1
+ vzip.32 Y2, X2
+ vzip.32 Y3, X3
+.endif
+
+ // XOR the encrypted/decrypted blocks with the tweaks we saved earlier
+ mov r12, sp
+ vld1.8 {TMP0, TMP1}, [r12:128]!
+ vld1.8 {TMP2, TMP3}, [r12:128]!
+ veor X0, TMP0
+ veor Y0, TMP1
+ veor X1, TMP2
+ veor Y1, TMP3
+ vld1.8 {TMP0, TMP1}, [r12:128]!
+ vld1.8 {TMP2, TMP3}, [r12:128]!
+ veor X2, TMP0
+ veor Y2, TMP1
+ veor X3, TMP2
+ veor Y3, TMP3
+
+ // Store the ciphertext in the destination buffer
+ vst1.8 {X0, Y0}, [DST]!
+ vst1.8 {X1, Y1}, [DST]!
+ vst1.8 {X2, Y2}, [DST]!
+ vst1.8 {X3, Y3}, [DST]!
+
+ // Continue if there are more 128-byte chunks remaining, else return
+ subs NBYTES, #128
+ bne .Lnext_128bytes_\@
+
+ // Store the next tweak
+.if \n == 64
+ vst1.8 {TWEAKV}, [TWEAK]
+.else
+ vst1.8 {TWEAKV_L}, [TWEAK]
+.endif
+
+ mov sp, r7
+ pop {r4-r7}
+ bx lr
+.endm
+
+ENTRY(speck128_xts_encrypt_neon)
+ _speck_xts_crypt n=64, decrypting=0
+ENDPROC(speck128_xts_encrypt_neon)
+
+ENTRY(speck128_xts_decrypt_neon)
+ _speck_xts_crypt n=64, decrypting=1
+ENDPROC(speck128_xts_decrypt_neon)
+
+ENTRY(speck64_xts_encrypt_neon)
+ _speck_xts_crypt n=32, decrypting=0
+ENDPROC(speck64_xts_encrypt_neon)
+
+ENTRY(speck64_xts_decrypt_neon)
+ _speck_xts_crypt n=32, decrypting=1
+ENDPROC(speck64_xts_decrypt_neon)
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NEON-accelerated implementation of Speck128-XTS and Speck64-XTS
+ *
+ * Copyright (c) 2018 Google, Inc
+ *
+ * Note: the NIST recommendation for XTS only specifies a 128-bit block size,
+ * but a 64-bit version (needed for Speck64) is fairly straightforward; the math
+ * is just done in GF(2^64) instead of GF(2^128), with the reducing polynomial
+ * x^64 + x^4 + x^3 + x + 1 from the original XEX paper (Rogaway, 2004:
+ * "Efficient Instantiations of Tweakable Blockciphers and Refinements to Modes
+ * OCB and PMAC"), represented as 0x1B.
+ */
+
+#include <asm/hwcap.h>
+#include <asm/neon.h>
+#include <asm/simd.h>
+#include <crypto/algapi.h>
+#include <crypto/gf128mul.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/speck.h>
+#include <crypto/xts.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+/* The assembly functions only handle multiples of 128 bytes */
+#define SPECK_NEON_CHUNK_SIZE 128
+
+/* Speck128 */
+
+struct speck128_xts_tfm_ctx {
+ struct speck128_tfm_ctx main_key;
+ struct speck128_tfm_ctx tweak_key;
+};
+
+asmlinkage void speck128_xts_encrypt_neon(const u64 *round_keys, int nrounds,
+ void *dst, const void *src,
+ unsigned int nbytes, void *tweak);
+
+asmlinkage void speck128_xts_decrypt_neon(const u64 *round_keys, int nrounds,
+ void *dst, const void *src,
+ unsigned int nbytes, void *tweak);
+
+typedef void (*speck128_crypt_one_t)(const struct speck128_tfm_ctx *,
+ u8 *, const u8 *);
+typedef void (*speck128_xts_crypt_many_t)(const u64 *, int, void *,
+ const void *, unsigned int, void *);
+
+static __always_inline int
+__speck128_xts_crypt(struct skcipher_request *req,
+ speck128_crypt_one_t crypt_one,
+ speck128_xts_crypt_many_t crypt_many)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct speck128_xts_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ le128 tweak;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+
+ crypto_speck128_encrypt(&ctx->tweak_key, (u8 *)&tweak, walk.iv);
+
+ while (walk.nbytes > 0) {
+ unsigned int nbytes = walk.nbytes;
+ u8 *dst = walk.dst.virt.addr;
+ const u8 *src = walk.src.virt.addr;
+
+ if (nbytes >= SPECK_NEON_CHUNK_SIZE && may_use_simd()) {
+ unsigned int count;
+
+ count = round_down(nbytes, SPECK_NEON_CHUNK_SIZE);
+ kernel_neon_begin();
+ (*crypt_many)(ctx->main_key.round_keys,
+ ctx->main_key.nrounds,
+ dst, src, count, &tweak);
+ kernel_neon_end();
+ dst += count;
+ src += count;
+ nbytes -= count;
+ }
+
+ /* Handle any remainder with generic code */
+ while (nbytes >= sizeof(tweak)) {
+ le128_xor((le128 *)dst, (const le128 *)src, &tweak);
+ (*crypt_one)(&ctx->main_key, dst, dst);
+ le128_xor((le128 *)dst, (const le128 *)dst, &tweak);
+ gf128mul_x_ble(&tweak, &tweak);
+
+ dst += sizeof(tweak);
+ src += sizeof(tweak);
+ nbytes -= sizeof(tweak);
+ }
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+
+ return err;
+}
+
+static int speck128_xts_encrypt(struct skcipher_request *req)
+{
+ return __speck128_xts_crypt(req, crypto_speck128_encrypt,
+ speck128_xts_encrypt_neon);
+}
+
+static int speck128_xts_decrypt(struct skcipher_request *req)
+{
+ return __speck128_xts_crypt(req, crypto_speck128_decrypt,
+ speck128_xts_decrypt_neon);
+}
+
+static int speck128_xts_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct speck128_xts_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+ int err;
+
+ err = xts_verify_key(tfm, key, keylen);
+ if (err)
+ return err;
+
+ keylen /= 2;
+
+ err = crypto_speck128_setkey(&ctx->main_key, key, keylen);
+ if (err)
+ return err;
+
+ return crypto_speck128_setkey(&ctx->tweak_key, key + keylen, keylen);
+}
+
+/* Speck64 */
+
+struct speck64_xts_tfm_ctx {
+ struct speck64_tfm_ctx main_key;
+ struct speck64_tfm_ctx tweak_key;
+};
+
+asmlinkage void speck64_xts_encrypt_neon(const u32 *round_keys, int nrounds,
+ void *dst, const void *src,
+ unsigned int nbytes, void *tweak);
+
+asmlinkage void speck64_xts_decrypt_neon(const u32 *round_keys, int nrounds,
+ void *dst, const void *src,
+ unsigned int nbytes, void *tweak);
+
+typedef void (*speck64_crypt_one_t)(const struct speck64_tfm_ctx *,
+ u8 *, const u8 *);
+typedef void (*speck64_xts_crypt_many_t)(const u32 *, int, void *,
+ const void *, unsigned int, void *);
+
+static __always_inline int
+__speck64_xts_crypt(struct skcipher_request *req, speck64_crypt_one_t crypt_one,
+ speck64_xts_crypt_many_t crypt_many)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct speck64_xts_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ __le64 tweak;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+
+ crypto_speck64_encrypt(&ctx->tweak_key, (u8 *)&tweak, walk.iv);
+
+ while (walk.nbytes > 0) {
+ unsigned int nbytes = walk.nbytes;
+ u8 *dst = walk.dst.virt.addr;
+ const u8 *src = walk.src.virt.addr;
+
+ if (nbytes >= SPECK_NEON_CHUNK_SIZE && may_use_simd()) {
+ unsigned int count;
+
+ count = round_down(nbytes, SPECK_NEON_CHUNK_SIZE);
+ kernel_neon_begin();
+ (*crypt_many)(ctx->main_key.round_keys,
+ ctx->main_key.nrounds,
+ dst, src, count, &tweak);
+ kernel_neon_end();
+ dst += count;
+ src += count;
+ nbytes -= count;
+ }
+
+ /* Handle any remainder with generic code */
+ while (nbytes >= sizeof(tweak)) {
+ *(__le64 *)dst = *(__le64 *)src ^ tweak;
+ (*crypt_one)(&ctx->main_key, dst, dst);
+ *(__le64 *)dst ^= tweak;
+ tweak = cpu_to_le64((le64_to_cpu(tweak) << 1) ^
+ ((tweak & cpu_to_le64(1ULL << 63)) ?
+ 0x1B : 0));
+ dst += sizeof(tweak);
+ src += sizeof(tweak);
+ nbytes -= sizeof(tweak);
+ }
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+
+ return err;
+}
+
+static int speck64_xts_encrypt(struct skcipher_request *req)
+{
+ return __speck64_xts_crypt(req, crypto_speck64_encrypt,
+ speck64_xts_encrypt_neon);
+}
+
+static int speck64_xts_decrypt(struct skcipher_request *req)
+{
+ return __speck64_xts_crypt(req, crypto_speck64_decrypt,
+ speck64_xts_decrypt_neon);
+}
+
+static int speck64_xts_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct speck64_xts_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
+ int err;
+
+ err = xts_verify_key(tfm, key, keylen);
+ if (err)
+ return err;
+
+ keylen /= 2;
+
+ err = crypto_speck64_setkey(&ctx->main_key, key, keylen);
+ if (err)
+ return err;
+
+ return crypto_speck64_setkey(&ctx->tweak_key, key + keylen, keylen);
+}
+
+static struct skcipher_alg speck_algs[] = {
+ {
+ .base.cra_name = "xts(speck128)",
+ .base.cra_driver_name = "xts-speck128-neon",
+ .base.cra_priority = 300,
+ .base.cra_blocksize = SPECK128_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct speck128_xts_tfm_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = 2 * SPECK128_128_KEY_SIZE,
+ .max_keysize = 2 * SPECK128_256_KEY_SIZE,
+ .ivsize = SPECK128_BLOCK_SIZE,
+ .walksize = SPECK_NEON_CHUNK_SIZE,
+ .setkey = speck128_xts_setkey,
+ .encrypt = speck128_xts_encrypt,
+ .decrypt = speck128_xts_decrypt,
+ }, {
+ .base.cra_name = "xts(speck64)",
+ .base.cra_driver_name = "xts-speck64-neon",
+ .base.cra_priority = 300,
+ .base.cra_blocksize = SPECK64_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct speck64_xts_tfm_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = 2 * SPECK64_96_KEY_SIZE,
+ .max_keysize = 2 * SPECK64_128_KEY_SIZE,
+ .ivsize = SPECK64_BLOCK_SIZE,
+ .walksize = SPECK_NEON_CHUNK_SIZE,
+ .setkey = speck64_xts_setkey,
+ .encrypt = speck64_xts_encrypt,
+ .decrypt = speck64_xts_decrypt,
+ }
+};
+
+static int __init speck_neon_module_init(void)
+{
+ if (!(elf_hwcap & HWCAP_NEON))
+ return -ENODEV;
+ return crypto_register_skciphers(speck_algs, ARRAY_SIZE(speck_algs));
+}
+
+static void __exit speck_neon_module_exit(void)
+{
+ crypto_unregister_skciphers(speck_algs, ARRAY_SIZE(speck_algs));
+}
+
+module_init(speck_neon_module_init);
+module_exit(speck_neon_module_exit);
+
+MODULE_DESCRIPTION("Speck block cipher (NEON-accelerated)");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>");
+MODULE_ALIAS_CRYPTO("xts(speck128)");
+MODULE_ALIAS_CRYPTO("xts-speck128-neon");
+MODULE_ALIAS_CRYPTO("xts(speck64)");
+MODULE_ALIAS_CRYPTO("xts-speck64-neon");
projects / openwrt / staging / blogic.git / commitdiff