Re: [fpc-pascal] Fatal: Internal error 200305103

[Ched]

Hello,

The 2.6.0 version which comes with apt-get is plenty of bugs. Installing the 2.6.4 downloaded from the 
link in the freepascal site makes it workable, at least for my programs, perfectly. So do the upgrade !


Cheers, Raoul





Le 22. 08. 15 16:44, Xiangrong Fang a écrit :

Hello,

I got "Fatal: Internal error 200305103" while try to compile the attached file 
on my raspi.

The file is a class helper. I wonder if that is supported on FPC 2.6.0 or not? 
And whether this problem
has anything to do with ARM?




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[fpc-pascal] Fatal: Internal error 200305103

[Xiangrong Fang]

Hello,

I got "Fatal: Internal error 200305103" while try to compile the attached
file on my raspi.

The file is a class helper. I wonder if that is supported on FPC 2.6.0 or
not? And whether this problem has anything to do with ARM?
unit cipher;
{$mode objfpc}{$H+}
interface
uses sysutils, BlowFish;
type
  TBlowFish = BlowFish.TBlowFish;
  TBlowFishModes = class helper for TBlowFish
  private
procedure CryptCTR(IV: QWord; buf: Pointer; len: Integer); inline;
  public
constructor Create(key: Pointer; KeySize: Integer);
procedure EncryptCTR(IV: QWord; buf: Pointer; len: Integer);
procedure DecryptCTR(IV: QWord; buf: Pointer; len: Integer);
procedure EncryptCBC(IV: QWord; buf: Pointer; len: Integer);
procedure DecryptCBC(IV: QWord; buf: Pointer; len: Integer);
  end;

implementation

constructor TBlowFishModes.Create(key: Pointer; KeySize: Integer);
begin
  inherited Create(PBlowFishKey(key)^, KeySize);
end;

procedure TBlowFishModes.EncryptCTR(IV: QWord; buf: Pointer; len: Integer);
begin
  CryptCTR(IV, Buf, len);
end;

procedure TBlowFishModes.DecryptCTR(IV: QWord; buf: Pointer; len: Integer);
begin
  CryptCTR(IV, Buf, len);
end;

procedure TBlowFishModes.CryptCTR(IV: QWord; buf: Pointer; len: Integer);
var
  i, cnt, res: Integer;
  ipt: QWord;
  iptb: array[0..7] of Byte absolute ipt;
  ptb: PQWord;
  ptr: PByte;
begin
  cnt := len div 8;
  res := len mod 8;
  for i := 0 to cnt - 1 do begin
ipt := IV xor i;
Encrypt(TBFBlock(ipt));
ptb := PQWord(buf + i * 8);
ptb^ := ptb^ xor ipt;
  end;
  if res > 0 then begin //process last block less than 8 byte
ipt := IV xor cnt;
for i := 0 to res - 1 do begin
  ptr := PByte(buf + cnt * 8 + i);
  ptr^ := ptr^ xor iptb[i];
end;
  end;
end;

procedure TBlowFishModes.EncryptCBC(IV: QWord; buf: Pointer; len: Integer);
var
  i, cnt, res: Integer;
  ptb: PQWord;
  last, prelast: QWord;
begin
  if len <= 8 then begin
CryptCTR(IV, buf, len);
Exit;
  end;
  cnt := len div 8;
  res := len mod 8;
  if res = 0 then begin
prelast := PQWord(buf+(cnt-2)*8)^;
last := PQWord(buf+(cnt-1)*8)^;
res := 8;
Dec(cnt, 2);
  end else begin
prelast := PQWord(buf+(cnt-1)*8)^;
last := PQWord(buf+cnt*8)^;
Dec(cnt);
  end;
  for i := 0 to cnt - 1 do begin
ptb := PQWord(buf + i * 8);
ptb^ := ptb^ xor IV;
Encrypt(TBFBlock(ptb^));
IV := ptb^;
  end;
  prelast := prelast xor IV;
  Encrypt(TBFBlock(prelast));
  Move(prelast, PByte(buf+(cnt+1)*8)^, res);
  last := last xor prelast;
  Encrypt(TBFBlock(last));
  PQWord(buf+cnt*8)^ := last;
end;

procedure TBlowFishModes.DecryptCBC(IV: QWord; buf: Pointer; len: Integer);
type
  QWB = array[0..7] of Byte;
var
  i, cnt, res: Integer;
  ptb: PQWord;
  ctx: QWord;
  last, prelast: QWord;
begin
  if len <= 8 then begin
CryptCTR(IV, buf, len);
Exit;
  end;
  cnt := len div 8;
  res := len mod 8;
  if res = 0 then begin
prelast := PQWord(buf+(cnt-2)*8)^;
last := PQWord(buf+(cnt-1)*8)^;
Dec(cnt, 2);
  end else begin
prelast := PQWord(buf+(cnt-1)*8)^;
last := PQWord(buf+cnt*8)^;
Dec(cnt);
  end;
  for i := 0 to cnt - 1 do begin
ptb := PQWord(buf + i * 8);
ctx := ptb^;
Decrypt(TBFBlock(ptb^));
ptb^ := ptb^ xor IV;
IV := ctx;
  end;
  Decrypt(TBFBlock(prelast));
  if res > 0 then begin
for i := res to 7 do QWB(last)[i] := QWB(prelast)[i];
  end else res := 8;
  prelast := prelast xor last;
  Move(prelast, PByte(buf+(cnt+1)*8)^, res);
  Decrypt(TBFBlock(last));
  PQWord(buf+cnt*8)^ := last xor IV;
end;

end.

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