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crypto: aesni - Fill in new context data structures

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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@fb.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dave Watson 2018-02-14 09:39:45 -08:00 committed by Herbert Xu
parent c594c54085
commit 9660474b0e
1 changed files with 39 additions and 12 deletions
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51
arch/x86/crypto/aesni-intel_asm.S
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@ -205,6 +205,21 @@ 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
@ -227,13 +242,9 @@ 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
@ -241,6 +252,12 @@ 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
@ -285,16 +302,23 @@ _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
@ -323,6 +347,7 @@ _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
@ -352,11 +377,15 @@ _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
@ -365,8 +394,7 @@ _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_\@:
@ -554,15 +582,14 @@ _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)