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Message-ID: <20180214173945.GA62068@davejwatson-mba>
Date: Wed, 14 Feb 2018 09:39:45 -0800
From: Dave Watson <davejwatson@...com>
To: Herbert Xu <herbert@...dor.apana.org.au>,
Junaid Shahid <junaids@...gle.com>,
Steffen Klassert <steffen.klassert@...unet.com>,
<linux-crypto@...r.kernel.org>
CC: "David S. Miller" <davem@...emloft.net>,
Hannes Frederic Sowa <hannes@...essinduktion.org>,
Tim Chen <tim.c.chen@...ux.intel.com>,
Sabrina Dubroca <sd@...asysnail.net>,
<linux-kernel@...r.kernel.org>,
Stephan Mueller <smueller@...onox.de>,
Ilya Lesokhin <ilyal@...lanox.com>
Subject: [PATCH v2 08/14] x86/crypto: aesni: Fill in new context data
structures
Fill in aadhash, aadlen, pblocklen, curcount with appropriate values.
pblocklen, aadhash, and pblockenckey are also updated at the end
of each scatter/gather operation, to be carried over to the next
operation.
Signed-off-by: Dave Watson <davejwatson@...com>
---
arch/x86/crypto/aesni-intel_asm.S | 51 ++++++++++++++++++++++++++++++---------
1 file changed, 39 insertions(+), 12 deletions(-)
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index 58bbfac..aa82493 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -204,6 +204,21 @@ ALL_F: .octa 0xffffffffffffffffffffffffffffffff
# GCM_INIT initializes a gcm_context struct to prepare for encoding/decoding.
# Clobbers rax, r10-r13 and xmm0-xmm6, %xmm13
.macro GCM_INIT
+
+ mov arg9, %r11
+ mov %r11, AadLen(%arg2) # ctx_data.aad_length = aad_length
+ xor %r11, %r11
+ mov %r11, InLen(%arg2) # ctx_data.in_length = 0
+ mov %r11, PBlockLen(%arg2) # ctx_data.partial_block_length = 0
+ mov %r11, PBlockEncKey(%arg2) # ctx_data.partial_block_enc_key = 0
+ mov %arg6, %rax
+ movdqu (%rax), %xmm0
+ movdqu %xmm0, OrigIV(%arg2) # ctx_data.orig_IV = iv
+
+ movdqa SHUF_MASK(%rip), %xmm2
+ PSHUFB_XMM %xmm2, %xmm0
+ movdqu %xmm0, CurCount(%arg2) # ctx_data.current_counter = iv
+
mov arg7, %r12
movdqu (%r12), %xmm13
movdqa SHUF_MASK(%rip), %xmm2
@@ -226,13 +241,9 @@ ALL_F: .octa 0xffffffffffffffffffffffffffffffff
pand POLY(%rip), %xmm2
pxor %xmm2, %xmm13
movdqa %xmm13, HashKey(%rsp)
- mov %arg5, %r13 # %xmm13 holds HashKey<<1 (mod poly)
- and $-16, %r13
- mov %r13, %r12
CALC_AAD_HASH %xmm13 %xmm0 %xmm1 %xmm2 %xmm3 %xmm4 \
%xmm5 %xmm6
- mov %r13, %r12
.endm
# GCM_ENC_DEC Encodes/Decodes given data. Assumes that the passed gcm_context
@@ -240,6 +251,12 @@ ALL_F: .octa 0xffffffffffffffffffffffffffffffff
# Requires the input data be at least 1 byte long because of READ_PARTIAL_BLOCK
# Clobbers rax, r10-r13, and xmm0-xmm15
.macro GCM_ENC_DEC operation
+ movdqu AadHash(%arg2), %xmm8
+ movdqu HashKey(%rsp), %xmm13
+ add %arg5, InLen(%arg2)
+ mov %arg5, %r13 # save the number of bytes
+ and $-16, %r13 # %r13 = %r13 - (%r13 mod 16)
+ mov %r13, %r12
# Encrypt/Decrypt first few blocks
and $(3<<4), %r12
@@ -284,16 +301,23 @@ _four_cipher_left_\@:
GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \
%xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8
_zero_cipher_left_\@:
+ movdqu %xmm8, AadHash(%arg2)
+ movdqu %xmm0, CurCount(%arg2)
+
mov %arg5, %r13
and $15, %r13 # %r13 = arg5 (mod 16)
je _multiple_of_16_bytes_\@
+ mov %r13, PBlockLen(%arg2)
+
# Handle the last <16 Byte block separately
paddd ONE(%rip), %xmm0 # INCR CNT to get Yn
+ movdqu %xmm0, CurCount(%arg2)
movdqa SHUF_MASK(%rip), %xmm10
PSHUFB_XMM %xmm10, %xmm0
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # Encrypt(K, Yn)
+ movdqu %xmm0, PBlockEncKey(%arg2)
lea (%arg4,%r11,1), %r10
mov %r13, %r12
@@ -322,6 +346,7 @@ _zero_cipher_left_\@:
.endif
GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
+ movdqu %xmm8, AadHash(%arg2)
.ifc \operation, enc
# GHASH computation for the last <16 byte block
movdqa SHUF_MASK(%rip), %xmm10
@@ -351,11 +376,15 @@ _multiple_of_16_bytes_\@:
# Output: Authorization Tag (AUTH_TAG)
# Clobbers rax, r10-r12, and xmm0, xmm1, xmm5-xmm15
.macro GCM_COMPLETE
- mov arg9, %r12 # %r13 = aadLen (number of bytes)
+ movdqu AadHash(%arg2), %xmm8
+ movdqu HashKey(%rsp), %xmm13
+ mov AadLen(%arg2), %r12 # %r13 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
movd %r12d, %xmm15 # len(A) in %xmm15
- shl $3, %arg5 # len(C) in bits (*128)
- MOVQ_R64_XMM %arg5, %xmm1
+ mov InLen(%arg2), %r12
+ shl $3, %r12 # len(C) in bits (*128)
+ MOVQ_R64_XMM %r12, %xmm1
+
pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000
pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C)
pxor %xmm15, %xmm8
@@ -364,8 +393,7 @@ _multiple_of_16_bytes_\@:
movdqa SHUF_MASK(%rip), %xmm10
PSHUFB_XMM %xmm10, %xmm8
- mov %arg6, %rax # %rax = *Y0
- movdqu (%rax), %xmm0 # %xmm0 = Y0
+ movdqu OrigIV(%arg2), %xmm0 # %xmm0 = Y0
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Y0)
pxor %xmm8, %xmm0
_return_T_\@:
@@ -553,15 +581,14 @@ _get_AAD_done\@:
.macro INITIAL_BLOCKS_ENC_DEC TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
+ MOVADQ SHUF_MASK(%rip), %xmm14
movdqu AadHash(%arg2), %xmm\i # XMM0 = Y0
xor %r11, %r11 # initialise the data pointer offset as zero
# start AES for num_initial_blocks blocks
- mov %arg6, %rax # %rax = *Y0
- movdqu (%rax), \XMM0 # XMM0 = Y0
- PSHUFB_XMM %xmm14, \XMM0
+ movdqu CurCount(%arg2), \XMM0 # XMM0 = Y0
.if (\i == 5) || (\i == 6) || (\i == 7)
--
2.9.5
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