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-rw-r--r--arch/arm/crypto/Kconfig6
-rw-r--r--arch/arm/crypto/Makefile2
-rw-r--r--arch/arm/crypto/curve25519-core.S347
-rw-r--r--arch/arm/crypto/curve25519-glue.c127
4 files changed, 287 insertions, 195 deletions
diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig
index 166d32616fea..ab676229b0da 100644
--- a/arch/arm/crypto/Kconfig
+++ b/arch/arm/crypto/Kconfig
@@ -142,4 +142,10 @@ config CRYPTO_NHPOLY1305_NEON
depends on KERNEL_MODE_NEON
select CRYPTO_NHPOLY1305
+config CRYPTO_CURVE25519_NEON
+ tristate "NEON accelerated Curve25519 scalar multiplication library"
+ depends on KERNEL_MODE_NEON
+ select CRYPTO_LIB_CURVE25519_GENERIC
+ select CRYPTO_ARCH_HAVE_LIB_CURVE25519
+
endif
diff --git a/arch/arm/crypto/Makefile b/arch/arm/crypto/Makefile
index d568d699b3b7..b745c17d356f 100644
--- a/arch/arm/crypto/Makefile
+++ b/arch/arm/crypto/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_CRYPTO_SHA512_ARM) += sha512-arm.o
obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha-neon.o
obj-$(CONFIG_CRYPTO_POLY1305_ARM) += poly1305-arm.o
obj-$(CONFIG_CRYPTO_NHPOLY1305_NEON) += nhpoly1305-neon.o
+obj-$(CONFIG_CRYPTO_CURVE25519_NEON) += curve25519-neon.o
obj-$(CONFIG_CRYPTO_AES_ARM_CE) += aes-arm-ce.o
obj-$(CONFIG_CRYPTO_SHA1_ARM_CE) += sha1-arm-ce.o
@@ -38,6 +39,7 @@ chacha-neon-y := chacha-scalar-core.o chacha-glue.o
chacha-neon-$(CONFIG_KERNEL_MODE_NEON) += chacha-neon-core.o
poly1305-arm-y := poly1305-core.o poly1305-glue.o
nhpoly1305-neon-y := nh-neon-core.o nhpoly1305-neon-glue.o
+curve25519-neon-y := curve25519-core.o curve25519-glue.o
ifdef REGENERATE_ARM_CRYPTO
quiet_cmd_perl = PERL $@
diff --git a/arch/arm/crypto/curve25519-core.S b/arch/arm/crypto/curve25519-core.S
index f33b85fef382..be18af52e7dc 100644
--- a/arch/arm/crypto/curve25519-core.S
+++ b/arch/arm/crypto/curve25519-core.S
@@ -1,43 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
- * Public domain code from Daniel J. Bernstein and Peter Schwabe, from
- * SUPERCOP's curve25519/neon2/scalarmult.s.
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ *
+ * Based on public domain code from Daniel J. Bernstein and Peter Schwabe. This
+ * began from SUPERCOP's curve25519/neon2/scalarmult.s, but has subsequently been
+ * manually reworked for use in kernel space.
*/
-.fpu neon
+#include <linux/linkage.h>
+
.text
+.fpu neon
+.arch armv7-a
.align 4
-.global _crypto_scalarmult_curve25519_neon2
-.global crypto_scalarmult_curve25519_neon2
-.type _crypto_scalarmult_curve25519_neon2 STT_FUNC
-.type crypto_scalarmult_curve25519_neon2 STT_FUNC
- _crypto_scalarmult_curve25519_neon2:
- crypto_scalarmult_curve25519_neon2:
- vpush {q4, q5, q6, q7}
- mov r12, sp
- sub sp, sp, #736
- and sp, sp, #0xffffffe0
- strd r4, [sp, #0]
- strd r6, [sp, #8]
- strd r8, [sp, #16]
- strd r10, [sp, #24]
- str r12, [sp, #480]
- str r14, [sp, #484]
- mov r0, r0
- mov r1, r1
- mov r2, r2
- add r3, sp, #32
- ldr r4, =0
- ldr r5, =254
+
+ENTRY(curve25519_neon)
+ push {r4-r11, lr}
+ mov ip, sp
+ sub r3, sp, #704
+ and r3, r3, #0xfffffff0
+ mov sp, r3
+ movw r4, #0
+ movw r5, #254
vmov.i32 q0, #1
vshr.u64 q1, q0, #7
vshr.u64 q0, q0, #8
vmov.i32 d4, #19
vmov.i32 d5, #38
- add r6, sp, #512
- vst1.8 {d2-d3}, [r6, : 128]
- add r6, sp, #528
- vst1.8 {d0-d1}, [r6, : 128]
- add r6, sp, #544
+ add r6, sp, #480
+ vst1.8 {d2-d3}, [r6, : 128]!
+ vst1.8 {d0-d1}, [r6, : 128]!
vst1.8 {d4-d5}, [r6, : 128]
add r6, r3, #0
vmov.i32 q2, #0
@@ -45,12 +37,12 @@
vst1.8 {d4-d5}, [r6, : 128]!
vst1.8 d4, [r6, : 64]
add r6, r3, #0
- ldr r7, =960
+ movw r7, #960
sub r7, r7, #2
neg r7, r7
sub r7, r7, r7, LSL #7
str r7, [r6]
- add r6, sp, #704
+ add r6, sp, #672
vld1.8 {d4-d5}, [r1]!
vld1.8 {d6-d7}, [r1]
vst1.8 {d4-d5}, [r6, : 128]!
@@ -212,15 +204,15 @@
vst1.8 {d0-d1}, [r6, : 128]!
vst1.8 {d2-d3}, [r6, : 128]!
vst1.8 d4, [r6, : 64]
-._mainloop:
+.Lmainloop:
mov r2, r5, LSR #3
and r6, r5, #7
ldrb r2, [r1, r2]
mov r2, r2, LSR r6
and r2, r2, #1
- str r5, [sp, #488]
+ str r5, [sp, #456]
eor r4, r4, r2
- str r2, [sp, #492]
+ str r2, [sp, #460]
neg r2, r4
add r4, r3, #96
add r5, r3, #192
@@ -291,7 +283,7 @@
vsub.i32 q0, q1, q3
vst1.8 d4, [r4, : 64]
vst1.8 d0, [r6, : 64]
- add r2, sp, #544
+ add r2, sp, #512
add r4, r3, #96
add r5, r3, #144
vld1.8 {d0-d1}, [r2, : 128]
@@ -361,14 +353,13 @@
vmlal.s32 q0, d12, d8
vmlal.s32 q0, d13, d17
vmlal.s32 q0, d6, d6
- add r2, sp, #512
- vld1.8 {d18-d19}, [r2, : 128]
+ add r2, sp, #480
+ vld1.8 {d18-d19}, [r2, : 128]!
vmull.s32 q3, d16, d7
vmlal.s32 q3, d10, d15
vmlal.s32 q3, d11, d14
vmlal.s32 q3, d12, d9
vmlal.s32 q3, d13, d8
- add r2, sp, #528
vld1.8 {d8-d9}, [r2, : 128]
vadd.i64 q5, q12, q9
vadd.i64 q6, q15, q9
@@ -502,22 +493,19 @@
vadd.i32 q5, q5, q0
vtrn.32 q11, q14
vadd.i32 q6, q6, q3
- add r2, sp, #560
+ add r2, sp, #528
vadd.i32 q10, q10, q2
vtrn.32 d24, d25
- vst1.8 {d12-d13}, [r2, : 128]
+ vst1.8 {d12-d13}, [r2, : 128]!
vshl.i32 q6, q13, #1
- add r2, sp, #576
- vst1.8 {d20-d21}, [r2, : 128]
+ vst1.8 {d20-d21}, [r2, : 128]!
vshl.i32 q10, q14, #1
- add r2, sp, #592
- vst1.8 {d12-d13}, [r2, : 128]
+ vst1.8 {d12-d13}, [r2, : 128]!
vshl.i32 q15, q12, #1
vadd.i32 q8, q8, q4
vext.32 d10, d31, d30, #0
vadd.i32 q7, q7, q1
- add r2, sp, #608
- vst1.8 {d16-d17}, [r2, : 128]
+ vst1.8 {d16-d17}, [r2, : 128]!
vmull.s32 q8, d18, d5
vmlal.s32 q8, d26, d4
vmlal.s32 q8, d19, d9
@@ -528,8 +516,7 @@
vmlal.s32 q8, d29, d1
vmlal.s32 q8, d24, d6
vmlal.s32 q8, d25, d0
- add r2, sp, #624
- vst1.8 {d14-d15}, [r2, : 128]
+ vst1.8 {d14-d15}, [r2, : 128]!
vmull.s32 q2, d18, d4
vmlal.s32 q2, d12, d9
vmlal.s32 q2, d13, d8
@@ -537,8 +524,7 @@
vmlal.s32 q2, d22, d2
vmlal.s32 q2, d23, d1
vmlal.s32 q2, d24, d0
- add r2, sp, #640
- vst1.8 {d20-d21}, [r2, : 128]
+ vst1.8 {d20-d21}, [r2, : 128]!
vmull.s32 q7, d18, d9
vmlal.s32 q7, d26, d3
vmlal.s32 q7, d19, d8
@@ -547,14 +533,12 @@
vmlal.s32 q7, d28, d1
vmlal.s32 q7, d23, d6
vmlal.s32 q7, d29, d0
- add r2, sp, #656
- vst1.8 {d10-d11}, [r2, : 128]
+ vst1.8 {d10-d11}, [r2, : 128]!
vmull.s32 q5, d18, d3
vmlal.s32 q5, d19, d2
vmlal.s32 q5, d22, d1
vmlal.s32 q5, d23, d0
vmlal.s32 q5, d12, d8
- add r2, sp, #672
vst1.8 {d16-d17}, [r2, : 128]
vmull.s32 q4, d18, d8
vmlal.s32 q4, d26, d2
@@ -566,7 +550,7 @@
vmlal.s32 q8, d26, d1
vmlal.s32 q8, d19, d6
vmlal.s32 q8, d27, d0
- add r2, sp, #576
+ add r2, sp, #544
vld1.8 {d20-d21}, [r2, : 128]
vmlal.s32 q7, d24, d21
vmlal.s32 q7, d25, d20
@@ -575,32 +559,30 @@
vmlal.s32 q8, d22, d21
vmlal.s32 q8, d28, d20
vmlal.s32 q5, d24, d20
- add r2, sp, #576
vst1.8 {d14-d15}, [r2, : 128]
vmull.s32 q7, d18, d6
vmlal.s32 q7, d26, d0
- add r2, sp, #656
+ add r2, sp, #624
vld1.8 {d30-d31}, [r2, : 128]
vmlal.s32 q2, d30, d21
vmlal.s32 q7, d19, d21
vmlal.s32 q7, d27, d20
- add r2, sp, #624
+ add r2, sp, #592
vld1.8 {d26-d27}, [r2, : 128]
vmlal.s32 q4, d25, d27
vmlal.s32 q8, d29, d27
vmlal.s32 q8, d25, d26
vmlal.s32 q7, d28, d27
vmlal.s32 q7, d29, d26
- add r2, sp, #608
+ add r2, sp, #576
vld1.8 {d28-d29}, [r2, : 128]
vmlal.s32 q4, d24, d29
vmlal.s32 q8, d23, d29
vmlal.s32 q8, d24, d28
vmlal.s32 q7, d22, d29
vmlal.s32 q7, d23, d28
- add r2, sp, #608
vst1.8 {d8-d9}, [r2, : 128]
- add r2, sp, #560
+ add r2, sp, #528
vld1.8 {d8-d9}, [r2, : 128]
vmlal.s32 q7, d24, d9
vmlal.s32 q7, d25, d31
@@ -621,36 +603,36 @@
vmlal.s32 q0, d23, d26
vmlal.s32 q0, d24, d31
vmlal.s32 q0, d19, d20
- add r2, sp, #640
+ add r2, sp, #608
vld1.8 {d18-d19}, [r2, : 128]
vmlal.s32 q2, d18, d7
- vmlal.s32 q2, d19, d6
vmlal.s32 q5, d18, d6
- vmlal.s32 q5, d19, d21
vmlal.s32 q1, d18, d21
- vmlal.s32 q1, d19, d29
vmlal.s32 q0, d18, d28
- vmlal.s32 q0, d19, d9
vmlal.s32 q6, d18, d29
+ vmlal.s32 q2, d19, d6
+ vmlal.s32 q5, d19, d21
+ vmlal.s32 q1, d19, d29
+ vmlal.s32 q0, d19, d9
vmlal.s32 q6, d19, d28
- add r2, sp, #592
+ add r2, sp, #560
vld1.8 {d18-d19}, [r2, : 128]
- add r2, sp, #512
+ add r2, sp, #480
vld1.8 {d22-d23}, [r2, : 128]
vmlal.s32 q5, d19, d7
vmlal.s32 q0, d18, d21
vmlal.s32 q0, d19, d29
vmlal.s32 q6, d18, d6
- add r2, sp, #528
+ add r2, sp, #496
vld1.8 {d6-d7}, [r2, : 128]
vmlal.s32 q6, d19, d21
- add r2, sp, #576
+ add r2, sp, #544
vld1.8 {d18-d19}, [r2, : 128]
vmlal.s32 q0, d30, d8
- add r2, sp, #672
+ add r2, sp, #640
vld1.8 {d20-d21}, [r2, : 128]
vmlal.s32 q5, d30, d29
- add r2, sp, #608
+ add r2, sp, #576
vld1.8 {d24-d25}, [r2, : 128]
vmlal.s32 q1, d30, d28
vadd.i64 q13, q0, q11
@@ -823,22 +805,19 @@
vadd.i32 q5, q5, q0
vtrn.32 q11, q14
vadd.i32 q6, q6, q3
- add r2, sp, #560
+ add r2, sp, #528
vadd.i32 q10, q10, q2
vtrn.32 d24, d25
- vst1.8 {d12-d13}, [r2, : 128]
+ vst1.8 {d12-d13}, [r2, : 128]!
vshl.i32 q6, q13, #1
- add r2, sp, #576
- vst1.8 {d20-d21}, [r2, : 128]
+ vst1.8 {d20-d21}, [r2, : 128]!
vshl.i32 q10, q14, #1
- add r2, sp, #592
- vst1.8 {d12-d13}, [r2, : 128]
+ vst1.8 {d12-d13}, [r2, : 128]!
vshl.i32 q15, q12, #1
vadd.i32 q8, q8, q4
vext.32 d10, d31, d30, #0
vadd.i32 q7, q7, q1
- add r2, sp, #608
- vst1.8 {d16-d17}, [r2, : 128]
+ vst1.8 {d16-d17}, [r2, : 128]!
vmull.s32 q8, d18, d5
vmlal.s32 q8, d26, d4
vmlal.s32 q8, d19, d9
@@ -849,8 +828,7 @@
vmlal.s32 q8, d29, d1
vmlal.s32 q8, d24, d6
vmlal.s32 q8, d25, d0
- add r2, sp, #624
- vst1.8 {d14-d15}, [r2, : 128]
+ vst1.8 {d14-d15}, [r2, : 128]!
vmull.s32 q2, d18, d4
vmlal.s32 q2, d12, d9
vmlal.s32 q2, d13, d8
@@ -858,8 +836,7 @@
vmlal.s32 q2, d22, d2
vmlal.s32 q2, d23, d1
vmlal.s32 q2, d24, d0
- add r2, sp, #640
- vst1.8 {d20-d21}, [r2, : 128]
+ vst1.8 {d20-d21}, [r2, : 128]!
vmull.s32 q7, d18, d9
vmlal.s32 q7, d26, d3
vmlal.s32 q7, d19, d8
@@ -868,15 +845,13 @@
vmlal.s32 q7, d28, d1
vmlal.s32 q7, d23, d6
vmlal.s32 q7, d29, d0
- add r2, sp, #656
- vst1.8 {d10-d11}, [r2, : 128]
+ vst1.8 {d10-d11}, [r2, : 128]!
vmull.s32 q5, d18, d3
vmlal.s32 q5, d19, d2
vmlal.s32 q5, d22, d1
vmlal.s32 q5, d23, d0
vmlal.s32 q5, d12, d8
- add r2, sp, #672
- vst1.8 {d16-d17}, [r2, : 128]
+ vst1.8 {d16-d17}, [r2, : 128]!
vmull.s32 q4, d18, d8
vmlal.s32 q4, d26, d2
vmlal.s32 q4, d19, d7
@@ -887,7 +862,7 @@
vmlal.s32 q8, d26, d1
vmlal.s32 q8, d19, d6
vmlal.s32 q8, d27, d0
- add r2, sp, #576
+ add r2, sp, #544
vld1.8 {d20-d21}, [r2, : 128]
vmlal.s32 q7, d24, d21
vmlal.s32 q7, d25, d20
@@ -896,32 +871,30 @@
vmlal.s32 q8, d22, d21
vmlal.s32 q8, d28, d20
vmlal.s32 q5, d24, d20
- add r2, sp, #576
vst1.8 {d14-d15}, [r2, : 128]
vmull.s32 q7, d18, d6
vmlal.s32 q7, d26, d0
- add r2, sp, #656
+ add r2, sp, #624
vld1.8 {d30-d31}, [r2, : 128]
vmlal.s32 q2, d30, d21
vmlal.s32 q7, d19, d21
vmlal.s32 q7, d27, d20
- add r2, sp, #624
+ add r2, sp, #592
vld1.8 {d26-d27}, [r2, : 128]
vmlal.s32 q4, d25, d27
vmlal.s32 q8, d29, d27
vmlal.s32 q8, d25, d26
vmlal.s32 q7, d28, d27
vmlal.s32 q7, d29, d26
- add r2, sp, #608
+ add r2, sp, #576
vld1.8 {d28-d29}, [r2, : 128]
vmlal.s32 q4, d24, d29
vmlal.s32 q8, d23, d29
vmlal.s32 q8, d24, d28
vmlal.s32 q7, d22, d29
vmlal.s32 q7, d23, d28
- add r2, sp, #608
vst1.8 {d8-d9}, [r2, : 128]
- add r2, sp, #560
+ add r2, sp, #528
vld1.8 {d8-d9}, [r2, : 128]
vmlal.s32 q7, d24, d9
vmlal.s32 q7, d25, d31
@@ -942,36 +915,36 @@
vmlal.s32 q0, d23, d26
vmlal.s32 q0, d24, d31
vmlal.s32 q0, d19, d20
- add r2, sp, #640
+ add r2, sp, #608
vld1.8 {d18-d19}, [r2, : 128]
vmlal.s32 q2, d18, d7
- vmlal.s32 q2, d19, d6
vmlal.s32 q5, d18, d6
- vmlal.s32 q5, d19, d21
vmlal.s32 q1, d18, d21
- vmlal.s32 q1, d19, d29
vmlal.s32 q0, d18, d28
- vmlal.s32 q0, d19, d9
vmlal.s32 q6, d18, d29
+ vmlal.s32 q2, d19, d6
+ vmlal.s32 q5, d19, d21
+ vmlal.s32 q1, d19, d29
+ vmlal.s32 q0, d19, d9
vmlal.s32 q6, d19, d28
- add r2, sp, #592
+ add r2, sp, #560
vld1.8 {d18-d19}, [r2, : 128]
- add r2, sp, #512
+ add r2, sp, #480
vld1.8 {d22-d23}, [r2, : 128]
vmlal.s32 q5, d19, d7
vmlal.s32 q0, d18, d21
vmlal.s32 q0, d19, d29
vmlal.s32 q6, d18, d6
- add r2, sp, #528
+ add r2, sp, #496
vld1.8 {d6-d7}, [r2, : 128]
vmlal.s32 q6, d19, d21
- add r2, sp, #576
+ add r2, sp, #544
vld1.8 {d18-d19}, [r2, : 128]
vmlal.s32 q0, d30, d8
- add r2, sp, #672
+ add r2, sp, #640
vld1.8 {d20-d21}, [r2, : 128]
vmlal.s32 q5, d30, d29
- add r2, sp, #608
+ add r2, sp, #576
vld1.8 {d24-d25}, [r2, : 128]
vmlal.s32 q1, d30, d28
vadd.i64 q13, q0, q11
@@ -1069,7 +1042,7 @@
sub r4, r4, #24
vst1.8 d0, [r2, : 64]
vst1.8 d1, [r4, : 64]
- add r2, sp, #544
+ add r2, sp, #512
add r4, r3, #144
add r5, r3, #192
vld1.8 {d0-d1}, [r2, : 128]
@@ -1139,14 +1112,13 @@
vmlal.s32 q0, d12, d8
vmlal.s32 q0, d13, d17
vmlal.s32 q0, d6, d6
- add r2, sp, #512
- vld1.8 {d18-d19}, [r2, : 128]
+ add r2, sp, #480
+ vld1.8 {d18-d19}, [r2, : 128]!
vmull.s32 q3, d16, d7
vmlal.s32 q3, d10, d15
vmlal.s32 q3, d11, d14
vmlal.s32 q3, d12, d9
vmlal.s32 q3, d13, d8
- add r2, sp, #528
vld1.8 {d8-d9}, [r2, : 128]
vadd.i64 q5, q12, q9
vadd.i64 q6, q15, q9
@@ -1295,22 +1267,19 @@
vadd.i32 q5, q5, q0
vtrn.32 q11, q14
vadd.i32 q6, q6, q3
- add r2, sp, #560
+ add r2, sp, #528
vadd.i32 q10, q10, q2
vtrn.32 d24, d25
- vst1.8 {d12-d13}, [r2, : 128]
+ vst1.8 {d12-d13}, [r2, : 128]!
vshl.i32 q6, q13, #1
- add r2, sp, #576
- vst1.8 {d20-d21}, [r2, : 128]
+ vst1.8 {d20-d21}, [r2, : 128]!
vshl.i32 q10, q14, #1
- add r2, sp, #592
- vst1.8 {d12-d13}, [r2, : 128]
+ vst1.8 {d12-d13}, [r2, : 128]!
vshl.i32 q15, q12, #1
vadd.i32 q8, q8, q4
vext.32 d10, d31, d30, #0
vadd.i32 q7, q7, q1
- add r2, sp, #608
- vst1.8 {d16-d17}, [r2, : 128]
+ vst1.8 {d16-d17}, [r2, : 128]!
vmull.s32 q8, d18, d5
vmlal.s32 q8, d26, d4
vmlal.s32 q8, d19, d9
@@ -1321,8 +1290,7 @@
vmlal.s32 q8, d29, d1
vmlal.s32 q8, d24, d6
vmlal.s32 q8, d25, d0
- add r2, sp, #624
- vst1.8 {d14-d15}, [r2, : 128]
+ vst1.8 {d14-d15}, [r2, : 128]!
vmull.s32 q2, d18, d4
vmlal.s32 q2, d12, d9
vmlal.s32 q2, d13, d8
@@ -1330,8 +1298,7 @@
vmlal.s32 q2, d22, d2
vmlal.s32 q2, d23, d1
vmlal.s32 q2, d24, d0
- add r2, sp, #640
- vst1.8 {d20-d21}, [r2, : 128]
+ vst1.8 {d20-d21}, [r2, : 128]!
vmull.s32 q7, d18, d9
vmlal.s32 q7, d26, d3
vmlal.s32 q7, d19, d8
@@ -1340,15 +1307,13 @@
vmlal.s32 q7, d28, d1
vmlal.s32 q7, d23, d6
vmlal.s32 q7, d29, d0
- add r2, sp, #656
- vst1.8 {d10-d11}, [r2, : 128]
+ vst1.8 {d10-d11}, [r2, : 128]!
vmull.s32 q5, d18, d3
vmlal.s32 q5, d19, d2
vmlal.s32 q5, d22, d1
vmlal.s32 q5, d23, d0
vmlal.s32 q5, d12, d8
- add r2, sp, #672
- vst1.8 {d16-d17}, [r2, : 128]
+ vst1.8 {d16-d17}, [r2, : 128]!
vmull.s32 q4, d18, d8
vmlal.s32 q4, d26, d2
vmlal.s32 q4, d19, d7
@@ -1359,7 +1324,7 @@
vmlal.s32 q8, d26, d1
vmlal.s32 q8, d19, d6
vmlal.s32 q8, d27, d0
- add r2, sp, #576
+ add r2, sp, #544
vld1.8 {d20-d21}, [r2, : 128]
vmlal.s32 q7, d24, d21
vmlal.s32 q7, d25, d20
@@ -1368,32 +1333,30 @@
vmlal.s32 q8, d22, d21
vmlal.s32 q8, d28, d20
vmlal.s32 q5, d24, d20
- add r2, sp, #576
vst1.8 {d14-d15}, [r2, : 128]
vmull.s32 q7, d18, d6
vmlal.s32 q7, d26, d0
- add r2, sp, #656
+ add r2, sp, #624
vld1.8 {d30-d31}, [r2, : 128]
vmlal.s32 q2, d30, d21
vmlal.s32 q7, d19, d21
vmlal.s32 q7, d27, d20
- add r2, sp, #624
+ add r2, sp, #592
vld1.8 {d26-d27}, [r2, : 128]
vmlal.s32 q4, d25, d27
vmlal.s32 q8, d29, d27
vmlal.s32 q8, d25, d26
vmlal.s32 q7, d28, d27
vmlal.s32 q7, d29, d26
- add r2, sp, #608
+ add r2, sp, #576
vld1.8 {d28-d29}, [r2, : 128]
vmlal.s32 q4, d24, d29
vmlal.s32 q8, d23, d29
vmlal.s32 q8, d24, d28
vmlal.s32 q7, d22, d29
vmlal.s32 q7, d23, d28
- add r2, sp, #608
vst1.8 {d8-d9}, [r2, : 128]
- add r2, sp, #560
+ add r2, sp, #528
vld1.8 {d8-d9}, [r2, : 128]
vmlal.s32 q7, d24, d9
vmlal.s32 q7, d25, d31
@@ -1414,36 +1377,36 @@
vmlal.s32 q0, d23, d26
vmlal.s32 q0, d24, d31
vmlal.s32 q0, d19, d20
- add r2, sp, #640
+ add r2, sp, #608
vld1.8 {d18-d19}, [r2, : 128]
vmlal.s32 q2, d18, d7
- vmlal.s32 q2, d19, d6
vmlal.s32 q5, d18, d6
- vmlal.s32 q5, d19, d21
vmlal.s32 q1, d18, d21
- vmlal.s32 q1, d19, d29
vmlal.s32 q0, d18, d28
- vmlal.s32 q0, d19, d9
vmlal.s32 q6, d18, d29
+ vmlal.s32 q2, d19, d6
+ vmlal.s32 q5, d19, d21
+ vmlal.s32 q1, d19, d29
+ vmlal.s32 q0, d19, d9
vmlal.s32 q6, d19, d28
- add r2, sp, #592
+ add r2, sp, #560
vld1.8 {d18-d19}, [r2, : 128]
- add r2, sp, #512
+ add r2, sp, #480
vld1.8 {d22-d23}, [r2, : 128]
vmlal.s32 q5, d19, d7
vmlal.s32 q0, d18, d21
vmlal.s32 q0, d19, d29
vmlal.s32 q6, d18, d6
- add r2, sp, #528
+ add r2, sp, #496
vld1.8 {d6-d7}, [r2, : 128]
vmlal.s32 q6, d19, d21
- add r2, sp, #576
+ add r2, sp, #544
vld1.8 {d18-d19}, [r2, : 128]
vmlal.s32 q0, d30, d8
- add r2, sp, #672
+ add r2, sp, #640
vld1.8 {d20-d21}, [r2, : 128]
vmlal.s32 q5, d30, d29
- add r2, sp, #608
+ add r2, sp, #576
vld1.8 {d24-d25}, [r2, : 128]
vmlal.s32 q1, d30, d28
vadd.i64 q13, q0, q11
@@ -1541,10 +1504,10 @@
sub r4, r4, #24
vst1.8 d0, [r2, : 64]
vst1.8 d1, [r4, : 64]
- ldr r2, [sp, #488]
- ldr r4, [sp, #492]
+ ldr r2, [sp, #456]
+ ldr r4, [sp, #460]
subs r5, r2, #1
- bge ._mainloop
+ bge .Lmainloop
add r1, r3, #144
add r2, r3, #336
vld1.8 {d0-d1}, [r1, : 128]!
@@ -1553,41 +1516,41 @@
vst1.8 {d0-d1}, [r2, : 128]!
vst1.8 {d2-d3}, [r2, : 128]!
vst1.8 d4, [r2, : 64]
- ldr r1, =0
-._invertloop:
+ movw r1, #0
+.Linvertloop:
add r2, r3, #144
- ldr r4, =0
- ldr r5, =2
+ movw r4, #0
+ movw r5, #2
cmp r1, #1
- ldreq r5, =1
+ moveq r5, #1
addeq r2, r3, #336
addeq r4, r3, #48
cmp r1, #2
- ldreq r5, =1
+ moveq r5, #1
addeq r2, r3, #48
cmp r1, #3
- ldreq r5, =5
+ moveq r5, #5
addeq r4, r3, #336
cmp r1, #4
- ldreq r5, =10
+ moveq r5, #10
cmp r1, #5
- ldreq r5, =20
+ moveq r5, #20
cmp r1, #6
- ldreq r5, =10
+ moveq r5, #10
addeq r2, r3, #336
addeq r4, r3, #336
cmp r1, #7
- ldreq r5, =50
+ moveq r5, #50
cmp r1, #8
- ldreq r5, =100
+ moveq r5, #100
cmp r1, #9
- ldreq r5, =50
+ moveq r5, #50
addeq r2, r3, #336
cmp r1, #10
- ldreq r5, =5
+ moveq r5, #5
addeq r2, r3, #48
cmp r1, #11
- ldreq r5, =0
+ moveq r5, #0
addeq r2, r3, #96
add r6, r3, #144
add r7, r3, #288
@@ -1598,8 +1561,8 @@
vst1.8 {d2-d3}, [r7, : 128]!
vst1.8 d4, [r7, : 64]
cmp r5, #0
- beq ._skipsquaringloop
-._squaringloop:
+ beq .Lskipsquaringloop
+.Lsquaringloop:
add r6, r3, #288
add r7, r3, #288
add r8, r3, #288
@@ -1611,7 +1574,7 @@
vld1.8 {d6-d7}, [r7, : 128]!
vld1.8 {d9}, [r7, : 64]
vld1.8 {d10-d11}, [r6, : 128]!
- add r7, sp, #416
+ add r7, sp, #384
vld1.8 {d12-d13}, [r6, : 128]!
vmul.i32 q7, q2, q0
vld1.8 {d8}, [r6, : 64]
@@ -1726,7 +1689,7 @@
vext.32 d10, d6, d6, #0
vmov.i32 q1, #0xffffffff
vshl.i64 q4, q1, #25
- add r7, sp, #512
+ add r7, sp, #480
vld1.8 {d14-d15}, [r7, : 128]
vadd.i64 q9, q2, q7
vshl.i64 q1, q1, #26
@@ -1735,7 +1698,7 @@
vadd.i64 q5, q5, q10
vand q9, q9, q1
vld1.8 {d16}, [r6, : 64]!
- add r6, sp, #528
+ add r6, sp, #496
vld1.8 {d20-d21}, [r6, : 128]
vadd.i64 q11, q5, q10
vsub.i64 q2, q2, q9
@@ -1789,8 +1752,8 @@
sub r6, r6, #32
vst1.8 d4, [r6, : 64]
subs r5, r5, #1
- bhi ._squaringloop
-._skipsquaringloop:
+ bhi .Lsquaringloop
+.Lskipsquaringloop:
mov r2, r2
add r5, r3, #288
add r6, r3, #144
@@ -1802,7 +1765,7 @@
vld1.8 {d6-d7}, [r5, : 128]!
vld1.8 {d9}, [r5, : 64]
vld1.8 {d10-d11}, [r2, : 128]!
- add r5, sp, #416
+ add r5, sp, #384
vld1.8 {d12-d13}, [r2, : 128]!
vmul.i32 q7, q2, q0
vld1.8 {d8}, [r2, : 64]
@@ -1917,7 +1880,7 @@
vext.32 d10, d6, d6, #0
vmov.i32 q1, #0xffffffff
vshl.i64 q4, q1, #25
- add r5, sp, #512
+ add r5, sp, #480
vld1.8 {d14-d15}, [r5, : 128]
vadd.i64 q9, q2, q7
vshl.i64 q1, q1, #26
@@ -1926,7 +1889,7 @@
vadd.i64 q5, q5, q10
vand q9, q9, q1
vld1.8 {d16}, [r2, : 64]!
- add r2, sp, #528
+ add r2, sp, #496
vld1.8 {d20-d21}, [r2, : 128]
vadd.i64 q11, q5, q10
vsub.i64 q2, q2, q9
@@ -1980,7 +1943,7 @@
sub r2, r2, #32
vst1.8 d4, [r2, : 64]
cmp r4, #0
- beq ._skippostcopy
+ beq .Lskippostcopy
add r2, r3, #144
mov r4, r4
vld1.8 {d0-d1}, [r2, : 128]!
@@ -1989,9 +1952,9 @@
vst1.8 {d0-d1}, [r4, : 128]!
vst1.8 {d2-d3}, [r4, : 128]!
vst1.8 d4, [r4, : 64]
-._skippostcopy:
+.Lskippostcopy:
cmp r1, #1
- bne ._skipfinalcopy
+ bne .Lskipfinalcopy
add r2, r3, #288
add r4, r3, #144
vld1.8 {d0-d1}, [r2, : 128]!
@@ -2000,10 +1963,10 @@
vst1.8 {d0-d1}, [r4, : 128]!
vst1.8 {d2-d3}, [r4, : 128]!
vst1.8 d4, [r4, : 64]
-._skipfinalcopy:
+.Lskipfinalcopy:
add r1, r1, #1
cmp r1, #12
- blo ._invertloop
+ blo .Linvertloop
add r1, r3, #144
ldr r2, [r1], #4
ldr r3, [r1], #4
@@ -2085,21 +2048,15 @@
add r8, r8, r10, LSL #12
mov r9, r10, LSR #20
add r1, r9, r1, LSL #6
- str r2, [r0], #4
- str r3, [r0], #4
- str r4, [r0], #4
- str r5, [r0], #4
- str r6, [r0], #4
- str r7, [r0], #4
- str r8, [r0], #4
- str r1, [r0]
- ldrd r4, [sp, #0]
- ldrd r6, [sp, #8]
- ldrd r8, [sp, #16]
- ldrd r10, [sp, #24]
- ldr r12, [sp, #480]
- ldr r14, [sp, #484]
- ldr r0, =0
- mov sp, r12
- vpop {q4, q5, q6, q7}
- bx lr
+ str r2, [r0]
+ str r3, [r0, #4]
+ str r4, [r0, #8]
+ str r5, [r0, #12]
+ str r6, [r0, #16]
+ str r7, [r0, #20]
+ str r8, [r0, #24]
+ str r1, [r0, #28]
+ movw r0, #0
+ mov sp, ip
+ pop {r4-r11, pc}
+ENDPROC(curve25519_neon)
diff --git a/arch/arm/crypto/curve25519-glue.c b/arch/arm/crypto/curve25519-glue.c
new file mode 100644
index 000000000000..2e9e12d2f642
--- /dev/null
+++ b/arch/arm/crypto/curve25519-glue.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ *
+ * Based on public domain code from Daniel J. Bernstein and Peter Schwabe. This
+ * began from SUPERCOP's curve25519/neon2/scalarmult.s, but has subsequently been
+ * manually reworked for use in kernel space.
+ */
+
+#include <asm/hwcap.h>
+#include <asm/neon.h>
+#include <asm/simd.h>
+#include <crypto/internal/kpp.h>
+#include <crypto/internal/simd.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/jump_label.h>
+#include <crypto/curve25519.h>
+
+asmlinkage void curve25519_neon(u8 mypublic[CURVE25519_KEY_SIZE],
+ const u8 secret[CURVE25519_KEY_SIZE],
+ const u8 basepoint[CURVE25519_KEY_SIZE]);
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
+
+void curve25519_arch(u8 out[CURVE25519_KEY_SIZE],
+ const u8 scalar[CURVE25519_KEY_SIZE],
+ const u8 point[CURVE25519_KEY_SIZE])
+{
+ if (static_branch_likely(&have_neon) && crypto_simd_usable()) {
+ kernel_neon_begin();
+ curve25519_neon(out, scalar, point);
+ kernel_neon_end();
+ } else {
+ curve25519_generic(out, scalar, point);
+ }
+}
+EXPORT_SYMBOL(curve25519_arch);
+
+static int curve25519_set_secret(struct crypto_kpp *tfm, const void *buf,
+ unsigned int len)
+{
+ u8 *secret = kpp_tfm_ctx(tfm);
+
+ if (!len)
+ curve25519_generate_secret(secret);
+ else if (len == CURVE25519_KEY_SIZE &&
+ crypto_memneq(buf, curve25519_null_point, CURVE25519_KEY_SIZE))
+ memcpy(secret, buf, CURVE25519_KEY_SIZE);
+ else
+ return -EINVAL;
+ return 0;
+}
+
+static int curve25519_compute_value(struct kpp_request *req)
+{
+ struct crypto_kpp *tfm = crypto_kpp_reqtfm(req);
+ const u8 *secret = kpp_tfm_ctx(tfm);
+ u8 public_key[CURVE25519_KEY_SIZE];
+ u8 buf[CURVE25519_KEY_SIZE];
+ int copied, nbytes;
+ u8 const *bp;
+
+ if (req->src) {
+ copied = sg_copy_to_buffer(req->src,
+ sg_nents_for_len(req->src,
+ CURVE25519_KEY_SIZE),
+ public_key, CURVE25519_KEY_SIZE);
+ if (copied != CURVE25519_KEY_SIZE)
+ return -EINVAL;
+ bp = public_key;
+ } else {
+ bp = curve25519_base_point;
+ }
+
+ curve25519_arch(buf, secret, bp);
+
+ /* might want less than we've got */
+ nbytes = min_t(size_t, CURVE25519_KEY_SIZE, req->dst_len);
+ copied = sg_copy_from_buffer(req->dst, sg_nents_for_len(req->dst,
+ nbytes),
+ buf, nbytes);
+ if (copied != nbytes)
+ return -EINVAL;
+ return 0;
+}
+
+static unsigned int curve25519_max_size(struct crypto_kpp *tfm)
+{
+ return CURVE25519_KEY_SIZE;
+}
+
+static struct kpp_alg curve25519_alg = {
+ .base.cra_name = "curve25519",
+ .base.cra_driver_name = "curve25519-neon",
+ .base.cra_priority = 200,
+ .base.cra_module = THIS_MODULE,
+ .base.cra_ctxsize = CURVE25519_KEY_SIZE,
+
+ .set_secret = curve25519_set_secret,
+ .generate_public_key = curve25519_compute_value,
+ .compute_shared_secret = curve25519_compute_value,
+ .max_size = curve25519_max_size,
+};
+
+static int __init mod_init(void)
+{
+ if (elf_hwcap & HWCAP_NEON) {
+ static_branch_enable(&have_neon);
+ return crypto_register_kpp(&curve25519_alg);
+ }
+ return 0;
+}
+
+static void __exit mod_exit(void)
+{
+ if (elf_hwcap & HWCAP_NEON)
+ crypto_unregister_kpp(&curve25519_alg);
+}
+
+module_init(mod_init);
+module_exit(mod_exit);
+
+MODULE_ALIAS_CRYPTO("curve25519");
+MODULE_ALIAS_CRYPTO("curve25519-neon");
+MODULE_LICENSE("GPL v2");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.