VeraCrypt
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path: root/src/Main/UserInterfaceException.h
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/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2017 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#ifndef TC_HEADER_Main_UserInterfaceException
#define TC_HEADER_Main_UserInterfaceException

#include "Platform/Platform.h"

namespace VeraCrypt
{
	TC_EXCEPTION_DECL (UserInterfaceException, Exception);
	TC_EXCEPTION_DECL (MissingArgument, UserInterfaceException);
	TC_EXCEPTION_DECL (NoItemSelected, UserInterfaceException);
	TC_EXCEPTION_DECL (StringFormatterException, UserInterfaceException);

	struct ErrorMessage : public UserInterfaceException
	{
		ErrorMessage (const string &exceptionMessage, const wxString &errorMessage) : UserInterfaceException (exceptionMessage), Text (errorMessage) { }
		virtual ~ErrorMessage () throw () { }

		operator wstring () const { return wstring (Text); }
		operator wxString () const { return Text; }

	protected:
		wxString Text;
	};

#define throw_err(message) throw ErrorMessage (SRC_POS, (message))
}

#endif // TC_HEADER_Main_UserInterfaceException
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;
; GOST89 implementation x64
; 
; 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
; https://opensource.org/licenses/Apache-2.0
;
; Some ideas from article https://xakep.ru/2013/10/19/shifrovanie-gost-28147-89/
;

[section .bss align=16]

;///////////////////////////////////////////////////////////////////
;// Win64 registers to save
;///////////////////////////////////////////////////////////////////
%macro SaveRegs 0
   sub rsp,8*8+10*16
   mov [rsp], rbx
   mov [rsp+8], rbp
   mov [rsp+8*2], rdi
   mov [rsp+8*3], rsi
   mov [rsp+8*4], r12
   mov [rsp+8*5], r13
   mov [rsp+8*6], r14
   mov [rsp+8*7], r15
%endmacro

%macro RestoreRegs 0
   mov rbx, [rsp]
   mov rbp, [rsp+8]
   mov rdi, [rsp+8*2]
   mov rsi, [rsp+8*3]
   mov r12, [rsp+8*4]
   mov r13, [rsp+8*5]
   mov r14, [rsp+8*6]
   mov r15, [rsp+8*7]
   add rsp,8*8+10*16
%endmacro

[section .text align=16]
;///////////////////////////////////////////////////////////////////
;// Crypting 2 blocks
;///////////////////////////////////////////////////////////////////
%macro gost_round2 2                               ; 1 - pos1, 2 - pos2
   ; 1st
   ; 1-2 byte
   add   ecx, r13d                                 ; add key
   movzx edi, cl
   movzx esi, ch
   xor   r14d, dword [r8 + 32 + 256*3*4 + rdi*4]
   xor   r14d, dword [r8 + 32 + 256*2*4 + rsi*4]
   shr   ecx, 16
   ; 3-4 ����
   movzx edi, cl
   xor   r14d, dword [r8 + 32 + 256*4 + rdi*4]
   movzx esi, ch
   xor   r14d, dword [r8 + 32 + rsi*4]
   mov   edx, [r8 + %1*4]                          ; read key for second step
   
   ; 2nd
   ; 1-2 byte
   add   eax, r10d                                 ; read key
   movzx r15d, al
   movzx ebp, ah
   xor   r11d, dword [r8 + 32 + 256*3*4 + r15*4]
   xor   r11d, dword [r8 + 32 + 256*2*4 + rbp*4]
   shr   eax, 16
   ; 3-4 ����
   movzx r15d, al
   xor   r11d, dword [r8 + 32 + 256*4 + r15*4]
   movzx ebp, ah
   xor   r11d, dword [r8 + 32 + rbp*4]
   mov   ebx, [r8 + %1*4]                          ; read key for second step
   
   ; second step
   ; 1st
   ; 1-2 byte
   add   edx, r14d                                 ; add key
   movzx edi, dl
   movzx esi, dh
   xor   r13d, dword [r8 + 32 + 256*3*4 + rdi*4]
   xor   r13d, dword [r8 + 32 + 256*2*4 + rsi*4]
   shr   edx, 16
   ; 3-4 ����
   movzx edi, dl
   xor   r13d, dword [r8 + 32 + 256*4 + rdi*4]
   movzx esi, dh
   xor   r13d, dword [r8 + 32 + rsi*4]
   mov   ecx, [r8 + %2*4]                          ; read key
   
   ; 2nd
   ; 1-2 byte
   add   ebx, r11d;                                ; add key
   movzx r15d, bl;
   movzx ebp, bh;
   xor   r10d, dword [r8 + 32 + 256*3*4 + r15*4]
   xor   r10d, dword [r8 + 32 + 256*2*4 + rbp*4]
   shr   ebx, 16
   ; 3-4 ����
   movzx r15d, bl
   xor   r10d, dword [r8 + 32 + 256*4 + r15*4]
   movzx ebp, bh
   xor   r10d, dword [r8 + 32 + rbp*4]
   mov   eax, [r8 + %2*4]                          ; read key
%endmacro

; input: r8 - &key, rcx - &IN
; returns: (r13) & (r10)
GostEncrypt2x64:
   ; 1st
   mov   r13d, [rcx]
   mov   r14,  [rcx]
   shr   r14, 32

   ; 2nd
   mov   r10d, [rcx + 16]
   mov   r11,  [rcx + 16]
   shr   r11, 32

   mov   ecx, [r8]
   mov   eax, ecx

   gost_round2 1, 2
   gost_round2 3, 4
   gost_round2 5, 6
   gost_round2 7, 0

   gost_round2 1, 2
   gost_round2 3, 4
   gost_round2 5, 6
   gost_round2 7, 0

   gost_round2 1, 2
   gost_round2 3, 4
   gost_round2 5, 6
   gost_round2 7, 7

   gost_round2 6, 5
   gost_round2 4, 3
   gost_round2 2, 1
   gost_round2 0, 0

   shl r13, 32                             ; combine
   or  r13, r14

   shl r10, 32                             ; combine
   or  r10, r11
   ret

; input: r8 - &key, rcx - &IN
; returns: (r13) & (r10)
GostDecrypt2x64:
   ; 1st
   mov   r13d, [rcx]
   mov   r14,  [rcx]
   shr   r14, 32

   ; 2nd
   mov   r10d, [rcx + 16]
   mov   r11,  [rcx + 16]
   shr   r11, 32

   mov   ecx, [r8]
   mov   eax, ecx

   gost_round2 1, 2
   gost_round2 3, 4
   gost_round2 5, 6
   gost_round2 7, 7

   gost_round2 6, 5
   gost_round2 4, 3
   gost_round2 2, 1
   gost_round2 0, 7

   gost_round2 6, 5
   gost_round2 4, 3
   gost_round2 2, 1
   gost_round2 0, 7

   gost_round2 6, 5
   gost_round2 4, 3
   gost_round2 2, 1
   gost_round2 0, 0

   shl r13, 32                             ; combine
   or  r13, r14

   shl r10, 32                             ; combine
   or  r10, r11
ret

;///////////////////////////////////////////////////////////////////
;// Crypting 1 block
;///////////////////////////////////////////////////////////////////
%macro gost_round1 2                                     ; 1 - pos1, 2 - pos2
   ; 1-2 byte
   add   ecx, r13d                                 ; add key
   movzx edi, cl
   movzx esi, ch
   xor   r14d, dword [r8 + 32 + 256*3*4 + rdi*4]
   xor   r14d, dword [r8 + 32 + 256*2*4 + rsi*4]
   shr   ecx, 16
   ; 3-4 ����
   movzx edi, cl
   xor   r14d, dword [r8 + 32 + 256*4 + rdi*4]
   movzx esi, ch
   xor   r14d, dword [r8 + 32 + rsi*4]
   mov   edx, [r8 + %1*4]                          ; read key for second step
   
   ; second step
   ; 1-2 byte
   add   edx, r14d                                 ; add key
   movzx edi, dl
   movzx esi, dh
   xor   r13d, dword [r8 + 32 + 256*3*4 + rdi*4]
   xor   r13d, dword [r8 + 32 + 256*2*4 + rsi*4]
   shr   edx, 16
   ; 3-4 ����
   movzx edi, dl
   xor   r13d, dword [r8 + 32 + 256*4 + rdi*4]
   movzx esi, dh
   xor   r13d, dword [r8 + 32 + rsi*4]
   mov   ecx, [r8 + %2*4]                          ; read key
%endmacro

; input: r8 - &gost_kds rcx - &IN
; returns: r13
GostEncrypt1x64:
   mov   r13d, [rcx]
   mov   r14,  [rcx]
   shr   r14, 32
   mov   ecx, [r8]

   gost_round1 1, 2
   gost_round1 3, 4
   gost_round1 5, 6
   gost_round1 7, 0
   
   gost_round1 1, 2
   gost_round1 3, 4
   gost_round1 5, 6
   gost_round1 7, 0
   
   gost_round1 1, 2
   gost_round1 3, 4
   gost_round1 5, 6
   gost_round1 7, 7
   
   gost_round1 6, 5
   gost_round1 4, 3
   gost_round1 2, 1
   gost_round1 0, 0

   shl r13, 32                             ; combine
   or  r13, r14
ret

; input: r8 - &gost_kds rcx - IN
; returns: r13
GostDecrypt1x64:
   mov   r13d, [rcx]
   mov   r14, [rcx]
   shr   r14, 32
   mov   ecx, [r8]
   
   gost_round1 1, 2
   gost_round1 3, 4
   gost_round1 5, 6
   gost_round1 7, 7
   
   gost_round1 6, 5
   gost_round1 4, 3
   gost_round1 2, 1
   gost_round1 0, 7
   
   gost_round1 6, 5
   gost_round1 4, 3
   gost_round1 2, 1
   gost_round1 0, 7
   
   gost_round1 6, 5
   gost_round1 4, 3
   gost_round1 2, 1
   gost_round1 0, 0

   shl r13, 32                             ; combine
   or  r13, r14
ret

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], rdx                             ; Save out addr
   mov [rsp + 8], rcx                         ; Save in addr
   mov [rsp + 16], r8                         ; key addr

.do:
   mov [rsp + 24], r9                      ; Save count
   cmp r9, 2
   jge .blk2
   cmp r9, 1
   jge .blk1
   jmp .end

; One 128 block encryption
.blk1:
   mov  rcx, [rsp + 8]                         ; set in addr
   call GostEncrypt1x64

   mov rdx, [rsp]                              ; Restore out
   mov rcx, [rsp + 8]                          ; restore in

   mov [rdx], r13
   mov rax, [rcx + 8]
   xor rax, r13                              ; CBC

   add rdx, 8                                ;next 8 bytes
   mov [rdx], rax

   mov rcx, rdx
   call GostEncrypt1x64

   mov rdx, [rsp]                             ; Restore out addr
   mov rcx, [rsp+8]                           ; Restore in addr

   mov [rdx + 8], r13

   add rdx,16
   mov [rsp], rdx

   add rcx, 16
   mov [rsp+8], rcx

   mov r9, [rsp + 24]
   dec r9

   jmp .do

.blk2:
   mov  rcx, [rsp + 8]                         ; set in addr
   call GostEncrypt2x64

   mov rdx, [rsp]                              ; Restore out
   mov rcx, [rsp + 8]                          ; restore in

   mov [rdx], r13

   mov rax, [rcx + 8]
   xor rax, r13                              ; CBC

   mov [rdx + 16], r10

   mov rbx, [rcx + 24]
   xor rbx, r10                              ; CBC

   mov [rdx + 8], rax
   mov [rdx + 24], rbx

   add rdx, 8                                ;next 8 bytes

   mov rcx, rdx
   call GostEncrypt2x64

   mov rdx, [rsp]                             ; Restore out addr
   mov rcx, [rsp+8]                           ; Restore in addr

   mov [rdx + 8], r13
   mov [rdx + 24], r10

   add rdx,32
   mov [rsp], rdx

   add rcx, 32
   mov [rsp+8], rcx

   mov r9, [rsp + 24]
   sub r9, 2

   jmp .do

.end:
   add rsp, 32                              ; Load out addr
   RestoreRegs                              ; Load
ret

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:
   SaveRegs                                 ; Saving
   
   sub rsp, 32
   mov [rsp], rdx                           ; Save out addr
   mov [rsp+8], rcx                         ; Save in addr
   mov [rsp+16], r8                         ; key addr

.do:
   mov [rsp + 24], r9                      ; Save count
   cmp r9, 2
   jge .blk2
   cmp r9, 1
   jge .blk1
   jmp .end

; One 128 block decryption
.blk1:
   add  rcx, 8
   call GostDecrypt1x64
   mov rdx, [rsp]                              ; Restore out
   mov rcx, [rsp + 8]                          ; Restore in
   mov rax, [rcx]
   xor rax, r13                                ; CBC
   mov [rdx + 8], rax

   call GostDecrypt1x64

   mov rdx, [rsp]                             ; Restore out addr
   mov rcx, [rsp+8]                           ; Restore in addr

   mov [rdx], r13

   add rdx,16
   mov [rsp], rdx

   add rcx, 16
   mov [rsp+8], rcx

   mov r9, [rsp + 24]
   dec r9

   jmp .do

.blk2:
   add  rcx, 8
   call GostDecrypt2x64
   mov rdx, [rsp]                              ; Restore out
   mov rcx, [rsp + 8]                          ; Restore in

   mov rax, [rcx]
   xor rax, r13                                ; CBC
   mov [rdx + 8], rax

   mov rbx, [rcx+16]
   xor rbx, r10                                ; CBC
   mov [rdx + 24], rbx

   call GostDecrypt2x64

   mov rdx, [rsp]                             ; Restore out addr
   mov rcx, [rsp+8]                           ; Restore in addr

   mov [rdx], r13
   mov [rdx+16], r10

   add rdx,32
   mov [rsp], rdx

   add rcx,32
   mov [rsp+8], rcx

   mov r9, [rsp + 24]
   sub r9, 2

   jmp .do

.end:
   add rsp, 32                              ; Load out addr
   RestoreRegs                              ; Load
ret