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DCPCrypt/DCPblockciphers.pas
Stephen Genusa 5fc435d45f Initial Commit with XE7 Package Files added 
DCPCrypt by David Barton updated and tested with Delphi 2009, 2010, XE,
XE2, XE3, XE4, XE5 by Warren Postma. Updated for XE7 by Stephen Genusa.
2015-03-08 18:30:34 -05:00

795 lines
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{******************************************************************************}
{* DCPcrypt v2.1 written by David Barton (crypto@cityinthesky.co.uk) **********}
{******************************************************************************}
{* Block cipher component definitions *****************************************}
{******************************************************************************}
{* Copyright (c) 1999-2002 David Barton *}
{* Permission is hereby granted, free of charge, to any person obtaining a *}
{* copy of this software and associated documentation files (the "Software"), *}
{* to deal in the Software without restriction, including without limitation *}
{* the rights to use, copy, modify, merge, publish, distribute, sublicense, *}
{* and/or sell copies of the Software, and to permit persons to whom the *}
{* Software is furnished to do so, subject to the following conditions: *}
{* *}
{* The above copyright notice and this permission notice shall be included in *}
{* all copies or substantial portions of the Software. *}
{* *}
{* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *}
{* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *}
{* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *}
{* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *}
{* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *}
{* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *}
{* DEALINGS IN THE SOFTWARE. *}
{******************************************************************************}
unit DCPblockciphers;
interface
uses
Classes, Sysutils, DCPcrypt2;
{******************************************************************************}
{ Base type definition for 64 bit block ciphers }
type
TDCP_blockcipher64= class(TDCP_blockcipher)
private
IV, CV: array[0..7] of byte;
procedure IncCounter;
public
class function GetBlockSize: integer; override;
{ Get the block size of the cipher (in bits) }
procedure Reset; override;
{ Reset any stored chaining information }
procedure Burn; override;
{ Clear all stored key information and chaining information }
procedure SetIV(const Value); override;
{ Sets the IV to Value and performs a reset }
procedure GetIV(var Value); override;
{ Returns the current chaining information, not the actual IV }
procedure Init(const Key; Size: longword; InitVector: pointer); override;
{ Do key setup based on the data in Key, size is in bits }
procedure EncryptCBC(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CBC method of encryption }
procedure DecryptCBC(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CBC method of decryption }
procedure EncryptCFB8bit(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CFB (8 bit) method of encryption }
procedure DecryptCFB8bit(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CFB (8 bit) method of decryption }
procedure EncryptCFBblock(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CFB (block) method of encryption }
procedure DecryptCFBblock(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CFB (block) method of decryption }
procedure EncryptOFB(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the OFB method of encryption }
procedure DecryptOFB(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the OFB method of decryption }
procedure EncryptCTR(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CTR method of encryption }
procedure DecryptCTR(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CTR method of decryption }
end;
{******************************************************************************}
{ Base type definition for 128 bit block ciphers }
type
TDCP_blockcipher128= class(TDCP_blockcipher)
private
IV, CV: array[0..15] of byte;
procedure IncCounter;
public
class function GetBlockSize: integer; override;
{ Get the block size of the cipher (in bits) }
procedure Reset; override;
{ Reset any stored chaining information }
procedure Burn; override;
{ Clear all stored key information and chaining information }
procedure SetIV(const Value); override;
{ Sets the IV to Value and performs a reset }
procedure GetIV(var Value); override;
{ Returns the current chaining information, not the actual IV }
procedure Init(const Key; Size: longword; InitVector: pointer); override;
{ Do key setup based on the data in Key, size is in bits }
procedure EncryptCBC(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CBC method of encryption }
procedure DecryptCBC(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CBC method of decryption }
procedure EncryptCFB8bit(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CFB (8 bit) method of encryption }
procedure DecryptCFB8bit(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CFB (8 bit) method of decryption }
procedure EncryptCFBblock(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CFB (block) method of encryption }
procedure DecryptCFBblock(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CFB (block) method of decryption }
procedure EncryptOFB(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the OFB method of encryption }
procedure DecryptOFB(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the OFB method of decryption }
procedure EncryptCTR(const Indata; var Outdata; Size: longword); override;
{ Encrypt size bytes of data using the CTR method of encryption }
procedure DecryptCTR(const Indata; var Outdata; Size: longword); override;
{ Decrypt size bytes of data using the CTR method of decryption }
end;
implementation
{ From XE2 and up the following flag enables conditional compiled pointer-code changes }
{$IF CompilerVersion >= 23}
{$DEFINE DELPHIXE2_UP}
{$POINTERMATH ON}
{$IFEND}
{** TDCP_blockcipher64 ********************************************************}
procedure TDCP_blockcipher64.IncCounter;
var
i: integer;
begin
Inc(CV[7]);
i:= 7;
while (i> 0) and (CV[i] = 0) do
begin
Inc(CV[i-1]);
Dec(i);
end;
end;
class function TDCP_blockcipher64.GetBlockSize: integer;
begin
Result:= 64;
end;
procedure TDCP_blockcipher64.Init(const Key; Size: longword; InitVector: pointer);
begin
inherited Init(Key,Size,InitVector);
InitKey(Key,Size);
if InitVector= nil then
begin
FillChar(IV,8,{$IFDEF DCP1COMPAT}$FF{$ELSE}0{$ENDIF});
EncryptECB(IV,IV);
Reset;
end
else
begin
Move(InitVector^,IV,8);
Reset;
end;
end;
procedure TDCP_blockcipher64.SetIV(const Value);
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
Move(Value,IV,8);
Reset;
end;
procedure TDCP_blockcipher64.GetIV(var Value);
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
Move(CV,Value,8);
end;
procedure TDCP_blockcipher64.Reset;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized')
else
Move(IV,CV,8);
end;
procedure TDCP_blockcipher64.Burn;
begin
FillChar(IV,8,$FF);
FillChar(CV,8,$FF);
inherited Burn;
end;
procedure TDCP_blockcipher64.EncryptCBC(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 8) do
begin
Move(p1^,p2^,8);
XorBlock(p2^,CV,8);
EncryptECB(p2^,p2^);
Move(p2^,CV,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,CV,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.DecryptCBC(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
Temp: array[0..7] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
FillChar(Temp, SizeOf(Temp), 0);
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 8) do
begin
Move(p1^,p2^,8);
Move(p1^,Temp,8);
DecryptECB(p2^,p2^);
XorBlock(p2^,CV,8);
Move(Temp,CV,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,CV,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.EncryptCFB8bit(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: Pbyte;
Temp: array[0..7] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to Size do
begin
EncryptECB(CV,Temp);
p2^:= p1^ xor Temp[0];
Move(CV[1],CV[0],8-1);
CV[7]:= p2^;
Inc(p1);
Inc(p2);
end;
end;
procedure TDCP_blockcipher64.DecryptCFB8bit(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: Pbyte;
TempByte: byte;
Temp: array[0..7] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to Size do
begin
TempByte:= p1^;
EncryptECB(CV,Temp);
p2^:= p1^ xor Temp[0];
Move(CV[1],CV[0],8-1);
CV[7]:= TempByte;
Inc(p1);
Inc(p2);
end;
end;
procedure TDCP_blockcipher64.EncryptCFBblock(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 8) do
begin
EncryptECB(CV,CV);
Move(p1^,p2^,8);
XorBlock(p2^,CV,8);
Move(p2^,CV,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,CV,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.DecryptCFBblock(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
Temp: array[0..7] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 8) do
begin
Move(p1^,Temp,8);
EncryptECB(CV,CV);
Move(p1^,p2^,8);
XorBlock(p2^,CV,8);
Move(Temp,CV,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,CV,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.EncryptOFB(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 8) do
begin
EncryptECB(CV,CV);
Move(p1^,p2^,8);
XorBlock(p2^,CV,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,CV,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.DecryptOFB(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 8) do
begin
EncryptECB(CV,CV);
Move(p1^,p2^,8);
XorBlock(p2^,CV,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,CV,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.EncryptCTR(const Indata; var Outdata; Size: longword);
var
temp: array[0..7] of byte;
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 8) do
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,8);
XorBlock(p2^,temp,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,temp,Size mod 8);
end;
end;
procedure TDCP_blockcipher64.DecryptCTR(const Indata; var Outdata; Size: longword);
var
temp: array[0..7] of byte;
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 8) do
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,8);
XorBlock(p2^,temp,8);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 8; {$ELSE} Inc(p1, 8); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 8; {$ELSE} Inc(p2, 8); {$ENDIF}
end;
if (Size mod 8)<> 0 then
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,Size mod 8);
XorBlock(p2^,temp,Size mod 8);
end;
end;
{** TDCP_blockcipher128 ********************************************************}
procedure TDCP_blockcipher128.IncCounter;
var
i: integer;
begin
Inc(CV[15]);
i:= 15;
while (i> 0) and (CV[i] = 0) do
begin
Inc(CV[i-1]);
Dec(i);
end;
end;
class function TDCP_blockcipher128.GetBlockSize: integer;
begin
Result:= 128;
end;
procedure TDCP_blockcipher128.Init(const Key; Size: longword; InitVector: pointer);
begin
inherited Init(Key,Size,InitVector);
InitKey(Key,Size);
if InitVector= nil then
begin
FillChar(IV,16,{$IFDEF DCP1COMPAT}$FF{$ELSE}0{$ENDIF});
EncryptECB(IV,IV);
Reset;
end
else
begin
Move(InitVector^,IV,16);
Reset;
end;
end;
procedure TDCP_blockcipher128.SetIV(const Value);
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
Move(Value,IV,16);
Reset;
end;
procedure TDCP_blockcipher128.GetIV(var Value);
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
Move(CV,Value,16);
end;
procedure TDCP_blockcipher128.Reset;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized')
else
Move(IV,CV,16);
end;
procedure TDCP_blockcipher128.Burn;
begin
FillChar(IV,16,$FF);
FillChar(CV,16,$FF);
inherited Burn;
end;
procedure TDCP_blockcipher128.EncryptCBC(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 16) do
begin
Move(p1^,p2^,16);
XorBlock(p2^,CV,16);
EncryptECB(p2^,p2^);
Move(p2^,CV,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,CV,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.DecryptCBC(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
Temp: array[0..15] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 16) do
begin
Move(p1^,p2^,16);
Move(p1^,Temp,16);
DecryptECB(p2^,p2^);
XorBlock(p2^,CV,16);
Move(Temp,CV,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,CV,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.EncryptCFB8bit(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: Pbyte;
Temp: array[0..15] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to Size do
begin
EncryptECB(CV,Temp);
p2^:= p1^ xor Temp[0];
Move(CV[1],CV[0],15);
CV[15]:= p2^;
Inc(p1);
Inc(p2);
end;
end;
procedure TDCP_blockcipher128.DecryptCFB8bit(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: Pbyte;
TempByte: byte;
Temp: array[0..15] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to Size do
begin
TempByte:= p1^;
EncryptECB(CV,Temp);
p2^:= p1^ xor Temp[0];
Move(CV[1],CV[0],15);
CV[15]:= TempByte;
Inc(p1);
Inc(p2);
end;
end;
procedure TDCP_blockcipher128.EncryptCFBblock(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 16) do
begin
EncryptECB(CV,CV);
Move(p1^,p2^,16);
XorBlock(p2^,CV,16);
Move(p2^,CV,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,CV,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.DecryptCFBblock(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
Temp: array[0..15] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 16) do
begin
Move(p1^,Temp,16);
EncryptECB(CV,CV);
Move(p1^,p2^,16);
XorBlock(p2^,CV,16);
Move(Temp,CV,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,CV,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.EncryptOFB(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 16) do
begin
EncryptECB(CV,CV);
Move(p1^,p2^,16);
XorBlock(p2^,CV,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,CV,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.DecryptOFB(const Indata; var Outdata; Size: longword);
var
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
for i:= 1 to (Size div 16) do
begin
EncryptECB(CV,CV);
Move(p1^,p2^,16);
XorBlock(p2^,CV,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,CV);
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,CV,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.EncryptCTR(const Indata; var Outdata; Size: longword);
var
temp: array[0..15] of byte;
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 16) do
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,16);
XorBlock(p2^,temp,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,temp,Size mod 16);
end;
end;
procedure TDCP_blockcipher128.DecryptCTR(const Indata; var Outdata; Size: longword);
var
temp: array[0..15] of byte;
i: longword;
p1, p2: PByte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
p1:= @Indata;
p2:= @Outdata;
FillChar(Temp, SizeOf(Temp), 0);
for i:= 1 to (Size div 16) do
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,16);
XorBlock(p2^,temp,16);
{$IFDEF DELPHIXE2_UP} p1:= PByte(p1) + 16; {$ELSE} Inc(p1, 16); {$ENDIF}
{$IFDEF DELPHIXE2_UP} p2:= PByte(p2) + 16; {$ELSE} Inc(p2, 16); {$ENDIF}
end;
if (Size mod 16)<> 0 then
begin
EncryptECB(CV,temp);
IncCounter;
Move(p1^,p2^,Size mod 16);
XorBlock(p2^,temp,Size mod 16);
end;
end;
end.
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