1 files changed, 329 insertions, 0 deletions
diff --git a/arch/arm64/crypto/sm4-ce-ccm-core.S b/arch/arm64/crypto/sm4-ce-ccm-core.S
new file mode 100644
index 000000000000..fa85856f33ce
--- /dev/null
+++ b/arch/arm64/crypto/sm4-ce-ccm-core.S
@@ -0,0 +1,329 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * SM4-CCM AEAD Algorithm using ARMv8 Crypto Extensions
+ * as specified in rfc8998
+ * https://datatracker.ietf.org/doc/html/rfc8998
+ *
+ * Copyright (C) 2022 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
+ */
+
+#include <linux/linkage.h>
+#include <linux/cfi_types.h>
+#include <asm/assembler.h>
+#include "sm4-ce-asm.h"
+
+.arch	armv8-a+crypto
+
+.irp b, 0, 1, 8, 9, 10, 11, 12, 13, 14, 15, 16, 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
+
+/* Register macros */
+
+#define RMAC	v16
+
+/* Helper macros. */
+
+#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;
+
+
+.align 3
+SYM_FUNC_START(sm4_ce_cbcmac_update)
+	/* input:
+	 *   x0: round key array, CTX
+	 *   x1: mac
+	 *   x2: src
+	 *   w3: nblocks
+	 */
+	SM4_PREPARE(x0)
+
+	ld1		{RMAC.16b}, [x1]
+
+.Lcbcmac_loop_4x:
+	cmp		w3, #4
+	blt		.Lcbcmac_loop_1x
+
+	sub		w3, w3, #4
+
+	ld1		{v0.16b-v3.16b}, [x2], #64
+
+	SM4_CRYPT_BLK(RMAC)
+	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
+
+	cbz		w3, .Lcbcmac_end
+	b		.Lcbcmac_loop_4x
+
+.Lcbcmac_loop_1x:
+	sub		w3, w3, #1
+
+	ld1		{v0.16b}, [x2], #16
+
+	SM4_CRYPT_BLK(RMAC)
+	eor		RMAC.16b, RMAC.16b, v0.16b
+
+	cbnz		w3, .Lcbcmac_loop_1x
+
+.Lcbcmac_end:
+	st1		{RMAC.16b}, [x1]
+	ret
+SYM_FUNC_END(sm4_ce_cbcmac_update)
+
+.align 3
+SYM_FUNC_START(sm4_ce_ccm_final)
+	/* input:
+	 *   x0: round key array, CTX
+	 *   x1: ctr0 (big endian, 128 bit)
+	 *   x2: mac
+	 */
+	SM4_PREPARE(x0)
+
+	ld1		{RMAC.16b}, [x2]
+	ld1		{v0.16b}, [x1]
+
+	SM4_CRYPT_BLK2(RMAC, v0)
+
+	/* en-/decrypt the mac with ctr0 */
+	eor		RMAC.16b, RMAC.16b, v0.16b
+	st1		{RMAC.16b}, [x2]
+
+	ret
+SYM_FUNC_END(sm4_ce_ccm_final)
+
+.align 3
+SYM_TYPED_FUNC_START(sm4_ce_ccm_enc)
+	/* input:
+	 *   x0: round key array, CTX
+	 *   x1: dst
+	 *   x2: src
+	 *   x3: ctr (big endian, 128 bit)
+	 *   w4: nbytes
+	 *   x5: mac
+	 */
+	SM4_PREPARE(x0)
+
+	ldp		x7, x8, [x3]
+	rev		x7, x7
+	rev		x8, x8
+
+	ld1		{RMAC.16b}, [x5]
+
+.Lccm_enc_loop_4x:
+	cmp		w4, #(4 * 16)
+	blt		.Lccm_enc_loop_1x
+
+	sub		w4, w4, #(4 * 16)
+
+	/* construct CTRs */
+	inc_le128(v8)			/* +0 */
+	inc_le128(v9)			/* +1 */
+	inc_le128(v10)			/* +2 */
+	inc_le128(v11)			/* +3 */
+
+	ld1		{v0.16b-v3.16b}, [x2], #64
+
+	SM4_CRYPT_BLK2(v8, RMAC)
+	eor		v8.16b, v8.16b, v0.16b
+	eor		RMAC.16b, RMAC.16b, v0.16b
+	SM4_CRYPT_BLK2(v9, RMAC)
+	eor		v9.16b, v9.16b, v1.16b
+	eor		RMAC.16b, RMAC.16b, v1.16b
+	SM4_CRYPT_BLK2(v10, RMAC)
+	eor		v10.16b, v10.16b, v2.16b
+	eor		RMAC.16b, RMAC.16b, v2.16b
+	SM4_CRYPT_BLK2(v11, RMAC)
+	eor		v11.16b, v11.16b, v3.16b
+	eor		RMAC.16b, RMAC.16b, v3.16b
+
+	st1		{v8.16b-v11.16b}, [x1], #64
+
+	cbz		w4, .Lccm_enc_end
+	b		.Lccm_enc_loop_4x
+
+.Lccm_enc_loop_1x:
+	cmp		w4, #16
+	blt		.Lccm_enc_tail
+
+	sub		w4, w4, #16
+
+	/* construct CTRs */
+	inc_le128(v8)
+
+	ld1		{v0.16b}, [x2], #16
+
+	SM4_CRYPT_BLK2(v8, RMAC)
+	eor		v8.16b, v8.16b, v0.16b
+	eor		RMAC.16b, RMAC.16b, v0.16b
+
+	st1		{v8.16b}, [x1], #16
+
+	cbz		w4, .Lccm_enc_end
+	b		.Lccm_enc_loop_1x
+
+.Lccm_enc_tail:
+	/* construct CTRs */
+	inc_le128(v8)
+
+	SM4_CRYPT_BLK2(RMAC, v8)
+
+	/* store new MAC */
+	st1		{RMAC.16b}, [x5]
+
+.Lccm_enc_tail_loop:
+	ldrb		w0, [x2], #1		/* get 1 byte from input */
+	umov		w9, v8.b[0]		/* get top crypted CTR byte */
+	umov		w6, RMAC.b[0]		/* get top MAC byte */
+
+	eor		w9, w9, w0		/* w9 = CTR ^ input */
+	eor		w6, w6, w0		/* w6 = MAC ^ input */
+
+	strb		w9, [x1], #1		/* store out byte */
+	strb		w6, [x5], #1		/* store MAC byte */
+
+	subs		w4, w4, #1
+	beq		.Lccm_enc_ret
+
+	/* shift out one byte */
+	ext		RMAC.16b, RMAC.16b, RMAC.16b, #1
+	ext		v8.16b, v8.16b, v8.16b, #1
+
+	b		.Lccm_enc_tail_loop
+
+.Lccm_enc_end:
+	/* store new MAC */
+	st1		{RMAC.16b}, [x5]
+
+	/* store new CTR */
+	rev		x7, x7
+	rev		x8, x8
+	stp		x7, x8, [x3]
+
+.Lccm_enc_ret:
+	ret
+SYM_FUNC_END(sm4_ce_ccm_enc)
+
+.align 3
+SYM_TYPED_FUNC_START(sm4_ce_ccm_dec)
+	/* input:
+	 *   x0: round key array, CTX
+	 *   x1: dst
+	 *   x2: src
+	 *   x3: ctr (big endian, 128 bit)
+	 *   w4: nbytes
+	 *   x5: mac
+	 */
+	SM4_PREPARE(x0)
+
+	ldp		x7, x8, [x3]
+	rev		x7, x7
+	rev		x8, x8
+
+	ld1		{RMAC.16b}, [x5]
+
+.Lccm_dec_loop_4x:
+	cmp		w4, #(4 * 16)
+	blt		.Lccm_dec_loop_1x
+
+	sub		w4, w4, #(4 * 16)
+
+	/* construct CTRs */
+	inc_le128(v8)			/* +0 */
+	inc_le128(v9)			/* +1 */
+	inc_le128(v10)			/* +2 */
+	inc_le128(v11)			/* +3 */
+
+	ld1		{v0.16b-v3.16b}, [x2], #64
+
+	SM4_CRYPT_BLK2(v8, RMAC)
+	eor		v8.16b, v8.16b, v0.16b
+	eor		RMAC.16b, RMAC.16b, v8.16b
+	SM4_CRYPT_BLK2(v9, RMAC)
+	eor		v9.16b, v9.16b, v1.16b
+	eor		RMAC.16b, RMAC.16b, v9.16b
+	SM4_CRYPT_BLK2(v10, RMAC)
+	eor		v10.16b, v10.16b, v2.16b
+	eor		RMAC.16b, RMAC.16b, v10.16b
+	SM4_CRYPT_BLK2(v11, RMAC)
+	eor		v11.16b, v11.16b, v3.16b
+	eor		RMAC.16b, RMAC.16b, v11.16b
+
+	st1		{v8.16b-v11.16b}, [x1], #64
+
+	cbz		w4, .Lccm_dec_end
+	b		.Lccm_dec_loop_4x
+
+.Lccm_dec_loop_1x:
+	cmp		w4, #16
+	blt		.Lccm_dec_tail
+
+	sub		w4, w4, #16
+
+	/* construct CTRs */
+	inc_le128(v8)
+
+	ld1		{v0.16b}, [x2], #16
+
+	SM4_CRYPT_BLK2(v8, RMAC)
+	eor		v8.16b, v8.16b, v0.16b
+	eor		RMAC.16b, RMAC.16b, v8.16b
+
+	st1		{v8.16b}, [x1], #16
+
+	cbz		w4, .Lccm_dec_end
+	b		.Lccm_dec_loop_1x
+
+.Lccm_dec_tail:
+	/* construct CTRs */
+	inc_le128(v8)
+
+	SM4_CRYPT_BLK2(RMAC, v8)
+
+	/* store new MAC */
+	st1		{RMAC.16b}, [x5]
+
+.Lccm_dec_tail_loop:
+	ldrb		w0, [x2], #1		/* get 1 byte from input */
+	umov		w9, v8.b[0]		/* get top crypted CTR byte */
+	umov		w6, RMAC.b[0]		/* get top MAC byte */
+
+	eor		w9, w9, w0		/* w9 = CTR ^ input */
+	eor		w6, w6, w9		/* w6 = MAC ^ output */
+
+	strb		w9, [x1], #1		/* store out byte */
+	strb		w6, [x5], #1		/* store MAC byte */
+
+	subs		w4, w4, #1
+	beq		.Lccm_dec_ret
+
+	/* shift out one byte */
+	ext		RMAC.16b, RMAC.16b, RMAC.16b, #1
+	ext		v8.16b, v8.16b, v8.16b, #1
+
+	b		.Lccm_dec_tail_loop
+
+.Lccm_dec_end:
+	/* store new MAC */
+	st1		{RMAC.16b}, [x5]
+
+	/* store new CTR */
+	rev		x7, x7
+	rev		x8, x8
+	stp		x7, x8, [x3]
+
+.Lccm_dec_ret:
+	ret
+SYM_FUNC_END(sm4_ce_ccm_dec)