VeraCrypt
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-rw-r--r--src/Crypto/GostCipher.c3
-rw-r--r--src/Crypto/gost89_x64.asm174
2 files changed, 90 insertions, 87 deletions
diff --git a/src/Crypto/GostCipher.c b/src/Crypto/GostCipher.c
index 925fdfaa..b84fd4ed 100644
--- a/src/Crypto/GostCipher.c
+++ b/src/Crypto/GostCipher.c
@@ -5,7 +5,8 @@ Copyright (c) 2016. Disk Cryptography Services for EFI (DCS), Alex Kolotnikov
This program and the accompanying materials
are licensed and made available under the terms and conditions
-of the Apache License, Version 2.0. The full text of the license may be found at
+of the Apache License, Version 2.0.
+The full text of the license may be found at
https://opensource.org/licenses/Apache-2.0
Dynamic SBOX idea is from GostCrypt project. Copyright (c) 2008-2011 TrueCrypt Developers Association
diff --git a/src/Crypto/gost89_x64.asm b/src/Crypto/gost89_x64.asm
index f2e49cb7..5f5892fe 100644
--- a/src/Crypto/gost89_x64.asm
+++ b/src/Crypto/gost89_x64.asm
@@ -5,7 +5,9 @@
;
; This program and the accompanying materials
; are licensed and made available under the terms and conditions
-; of the Apache License, Version 2.0. The full text of the license may be found at
+; of the Apache License, Version 2.0.
+;
+; The full text of the license may be found at
; https://opensource.org/licenses/Apache-2.0
;
; Some ideas from article https://xakep.ru/2013/10/19/shifrovanie-gost-28147-89/
@@ -107,17 +109,17 @@
mov eax, [r8 + %2*4] ; read key
%endmacro
-; input: r8 - &key, rdx - &IN
+; input: r8 - &key, rcx - &IN
; returns: (r13) & (r10)
GostEncrypt2x64:
; 1st
- mov r13d, [rdx]
- mov r14, [rdx]
+ mov r13d, [rcx]
+ mov r14, [rcx]
shr r14, 32
; 2nd
- mov r10d, [rdx + 16]
- mov r11, [rdx + 16]
+ mov r10d, [rcx + 16]
+ mov r11, [rcx + 16]
shr r11, 32
mov ecx, [r8]
@@ -150,17 +152,17 @@ GostEncrypt2x64:
or r10, r11
ret
-; input: r8 - &key, rdx - &IN
+; input: r8 - &key, rcx - &IN
; returns: (r13) & (r10)
GostDecrypt2x64:
; 1st
- mov r13d, [rdx]
- mov r14, [rdx]
+ mov r13d, [rcx]
+ mov r14, [rcx]
shr r14, 32
; 2nd
- mov r10d, [rdx + 16]
- mov r11, [rdx + 16]
+ mov r10d, [rcx + 16]
+ mov r11, [rcx + 16]
shr r11, 32
mov ecx, [r8]
@@ -227,11 +229,11 @@ ret
mov ecx, [r8 + %2*4] ; read key
%endmacro
-; input: r8 - &gost_kds rdx - &IN
+; input: r8 - &gost_kds rcx - &IN
; returns: r13
GostEncrypt1x64:
- mov r13d, [rdx]
- mov r14, [rdx]
+ mov r13d, [rcx]
+ mov r14, [rcx]
shr r14, 32
mov ecx, [r8]
@@ -259,11 +261,11 @@ GostEncrypt1x64:
or r13, r14
ret
-; input: r8 - &gost_kds rdx - IN
+; input: r8 - &gost_kds rcx - IN
; returns: r13
GostDecrypt1x64:
- mov r13d, [rdx]
- mov r14, [rdx]
+ mov r13d, [rcx]
+ mov r14, [rcx]
shr r14, 32
mov ecx, [r8]
@@ -291,17 +293,17 @@ GostDecrypt1x64:
or r13, r14
ret
-global gost_encrypt_128_CBC_asm ; gost_encrypt_128_CBC_asm(uint64* out, uint64* in, gost_kds* kds, uint64 count);
-; rcx - &out
-; rdx - &in
+global gost_encrypt_128_CBC_asm ; gost_encrypt_128_CBC_asm(uint64* in, uint64* out, gost_kds* kds, uint64 count);
+; rcx - &in
+; rdx - &out
; r8 - &gost_kds
; r9 - count
gost_encrypt_128_CBC_asm:
SaveRegs ; Saving
sub rsp, 32
- mov [rsp], rcx ; Save out addr
- mov [rsp + 8], rdx ; Save in addr
+ mov [rsp], rdx ; Save out addr
+ mov [rsp + 8], rcx ; Save in addr
mov [rsp + 16], r8 ; key addr
.do:
@@ -314,32 +316,32 @@ gost_encrypt_128_CBC_asm:
; One 128 block encryption
.blk1:
- mov rdx, [rsp + 8] ; set in addr
+ mov rcx, [rsp + 8] ; set in addr
call GostEncrypt1x64
- mov rcx, [rsp] ; Restore out
- mov rdx, [rsp + 8] ; restore in
+ mov rdx, [rsp] ; Restore out
+ mov rcx, [rsp + 8] ; restore in
- mov [rcx], r13
- mov rax, [rdx + 8]
+ mov [rdx], r13
+ mov rax, [rcx + 8]
xor rax, r13 ; CBC
- add rcx, 8 ;next 8 bytes
- mov [rcx], rax
+ add rdx, 8 ;next 8 bytes
+ mov [rdx], rax
- mov rdx, rcx
+ mov rcx, rdx
call GostEncrypt1x64
- mov rcx, [rsp] ; Restore out addr
- mov rdx, [rsp+8] ; Restore in addr
+ mov rdx, [rsp] ; Restore out addr
+ mov rcx, [rsp+8] ; Restore in addr
- mov [rcx + 8], r13
+ mov [rdx + 8], r13
- add rcx,16
- mov [rsp], rcx
+ add rdx,16
+ mov [rsp], rdx
- add rdx, 16
- mov [rsp+8], rdx
+ add rcx, 16
+ mov [rsp+8], rcx
mov r9, [rsp + 24]
dec r9
@@ -347,41 +349,41 @@ gost_encrypt_128_CBC_asm:
jmp .do
.blk2:
- mov rdx, [rsp + 8] ; set in addr
+ mov rcx, [rsp + 8] ; set in addr
call GostEncrypt2x64
- mov rcx, [rsp] ; Restore out
- mov rdx, [rsp + 8] ; restore in
+ mov rdx, [rsp] ; Restore out
+ mov rcx, [rsp + 8] ; restore in
- mov [rcx], r13
+ mov [rdx], r13
- mov rax, [rdx + 8]
+ mov rax, [rcx + 8]
xor rax, r13 ; CBC
- mov [rcx + 16], r10
+ mov [rdx + 16], r10
- mov rbx, [rdx + 24]
+ mov rbx, [rcx + 24]
xor rbx, r10 ; CBC
- mov [rcx + 8], rax
- mov [rcx + 24], rbx
+ mov [rdx + 8], rax
+ mov [rdx + 24], rbx
- add rcx, 8 ;next 8 bytes
+ add rdx, 8 ;next 8 bytes
- mov rdx, rcx
+ mov rcx, rdx
call GostEncrypt2x64
- mov rcx, [rsp] ; Restore out addr
- mov rdx, [rsp+8] ; Restore in addr
+ mov rdx, [rsp] ; Restore out addr
+ mov rcx, [rsp+8] ; Restore in addr
- mov [rcx + 8], r13
- mov [rcx + 24], r10
+ mov [rdx + 8], r13
+ mov [rdx + 24], r10
- add rcx,32
- mov [rsp], rcx
+ add rdx,32
+ mov [rsp], rdx
- add rdx, 32
- mov [rsp+8], rdx
+ add rcx, 32
+ mov [rsp+8], rcx
mov r9, [rsp + 24]
sub r9, 2
@@ -393,9 +395,9 @@ gost_encrypt_128_CBC_asm:
RestoreRegs ; Load
ret
-global gost_decrypt_128_CBC_asm ; gost_decrypt_128_CBC_asm(uint64* out, uint64* in, const gost_kds* kds, uint64 count);
-; rcx - &out
-; rdx - &in
+global gost_decrypt_128_CBC_asm ; gost_decrypt_128_CBC_asm(uint64* in, uint64* out, const gost_kds* kds, uint64 count);
+; rcx - &in
+; rdx - &out
; r8 - &gost_kds
; r9 - count
gost_decrypt_128_CBC_asm:
@@ -416,26 +418,26 @@ gost_decrypt_128_CBC_asm:
; One 128 block decryption
.blk1:
- add rdx, 8
+ add rcx, 8
call GostDecrypt1x64
- mov rcx, [rsp] ; Restore out
- mov rdx, [rsp + 8] ; Restore in
- mov rax, [rdx]
+ mov rdx, [rsp] ; Restore out
+ mov rcx, [rsp + 8] ; Restore in
+ mov rax, [rcx]
xor rax, r13 ; CBC
- mov [rcx + 8], rax
+ mov [rdx + 8], rax
call GostDecrypt1x64
- mov rcx, [rsp] ; Restore out addr
- mov rdx, [rsp+8] ; Restore in addr
+ mov rdx, [rsp] ; Restore out addr
+ mov rcx, [rsp+8] ; Restore in addr
- mov [rcx], r13
+ mov [rdx], r13
- add rcx,16
- mov [rsp], rcx
+ add rdx,16
+ mov [rsp], rdx
- add rdx, 16
- mov [rsp+8], rdx
+ add rcx, 16
+ mov [rsp+8], rcx
mov r9, [rsp + 24]
dec r9
@@ -443,32 +445,32 @@ gost_decrypt_128_CBC_asm:
jmp .do
.blk2:
- add rdx, 8
+ add rcx, 8
call GostDecrypt2x64
- mov rcx, [rsp] ; Restore out
- mov rdx, [rsp + 8] ; Restore in
+ mov rdx, [rsp] ; Restore out
+ mov rcx, [rsp + 8] ; Restore in
- mov rax, [rdx]
+ mov rax, [rcx]
xor rax, r13 ; CBC
- mov [rcx + 8], rax
+ mov [rdx + 8], rax
- mov rbx, [rdx+16]
+ mov rbx, [rcx+16]
xor rbx, r10 ; CBC
- mov [rcx + 24], rbx
+ mov [rdx + 24], rbx
call GostDecrypt2x64
- mov rcx, [rsp] ; Restore out addr
- mov rdx, [rsp+8] ; Restore in addr
+ mov rdx, [rsp] ; Restore out addr
+ mov rcx, [rsp+8] ; Restore in addr
- mov [rcx], r13
- mov [rcx+16], r10
-
- add rcx,32
- mov [rsp], rcx
+ mov [rdx], r13
+ mov [rdx+16], r10
add rdx,32
- mov [rsp+8], rdx
+ mov [rsp], rdx
+
+ add rcx,32
+ mov [rsp+8], rcx
mov r9, [rsp + 24]
sub r9, 2