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Posted on
2009-02-11 15:58
伯乐共勉
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  Code
 unit NtlmMsgs;
interface
uses
SysUtils, Encryption;
type
TNTLM_Message1 = record
Protocol: array [0..7] of Byte;
MsgType: Char;
Zero1: array [0..2] of Byte;
Flags: Word;
Zero2: array [0..1] of Byte;
LenDomain1: Word;
LenDomain2: Word;
OffSetDomain: Word;
Zero3: array [0..1] of Byte;
LenHost1: Word;
LenHost2: Word;
OffSetHost: Word;
Zero4: array [0..1] of Byte;
end;
TNTLM_Message2 = record
Protocol: array [0..7] of Byte;
MsgType: Char;
Zero1: array [0..6] of Byte;
LenMessage: Word;
Zero2: array [0..1] of Byte;
Flags: Word;
Zero3: array [0..1] of Byte;
Nonce: array [0..7] of Byte;
Zero4: array [0..7] of Byte;
end;
TNTLM_Message3 = record
Protocol: array [0..7] of Byte;
MsgType: Char;
Zero1: array [0..2] of Byte;
Len_LM_Resp1: Word;
Len_LM_Resp2: Word;
OffSet_LM_Resp: Word;
Zero2: array [0..1] of Byte;
Len_NT_Resp1: Word;
Len_NT_Resp2: Word;
OffSet_NT_Resp: Word;
Zero3: array [0..1] of Byte;
LenDomain1: Word;
LenDomain2: Word;
OffSetDomain: Word;
Zero4: array [0..1] of Byte;
LenUser1: Word;
LenUser2: Word;
OffSetUser: Word;
Zero5: array [0..1] of Byte;
LenHost1: Word;
LenHost2: Word;
OffSetHost: Word;
Zero6: array [0..5] of Byte;
LenMessage: Word;
Zero7: array [0..1] of Byte;
Flags: Word;
Zero8: array [0..1] of Byte;
end;
type
INTLM = interface
['{E184F5EF-CB02-11D6-A883-0002B30B8C0F}']
function GetMensaje1( AHost, ADomain: String ): String;
function GetMensaje2( AServerReply: String ): TNTLM_Message2;
function GetMensaje3( ADomain, AHost, AUser, APassword: String; ANonce: Array of Byte ): String;
end;
TNTLM = class( TInterfacedObject, INTLM )
private
{ Public declarations }
function GetLMHash( APassword: String; ANonce: Array of Byte ): String;
function GetNTHash( APassword: String; ANonce: Array of Byte ): String;
function Unicode( AData: String ): String;
public
{ Public declarations }
function GetMensaje1( AHost, ADomain: String ): String;
function GetMensaje2( AServerReply: String ): TNTLM_Message2;
function ReverseMessage1(AString: string): TNTLM_Message1;
function GetMensaje3( ADomain, AHost, AUser, APassword: String; ANonce: Array of Byte ): String;
end;
implementation
{ TNTLM }
function TNTLM.GetMensaje1(AHost, ADomain: String): String;
var
Msg: TNTLM_Message1;
MessageAux: String;
Encryption: IEncryption;
begin
Encryption := TEncryption.Create;
AHost := UpperCase( AHost );
ADomain := UpperCase( ADomain );
with Msg do
begin
FillChar( Msg, sizeof( Msg ), #0 );
Move( 'NTLMSSP' + #0, Protocol, 8 );
MsgType := #1;
//Flags := 45571;
//Flags := 33287;
Flags := 519;
//Zero2 :=
LenHost1 := Length( AHost );
LenHost2 := LenHost1;
//OffSetHost := $20;
OffSetHost := 0;
LenDomain1 := Length( ADomain );
LenDomain2 := LenDomain1;
OffSetDomain := OffSetHost + LenHost1;
{new method}
end;
SetLength( MessageAux, sizeof( Msg ) );
Move( Msg, MessageAux[1], sizeof( Msg ) );
MessageAux := MessageAux + AHost + ADomain;
Result := Encryption.StrToBase64( MessageAux );
end;
function TNTLM.GetMensaje2(AServerReply: String): TNTLM_Message2;
var
Msg: TNTLM_Message2;
NTLMReply: String;
Encryption: IEncryption;
begin
Encryption := TEncryption.Create;
NTLMReply := Encryption.Base64toStr( AServerReply );
Move( NTLMReply[1], Msg, sizeof( Msg ) );
Result := Msg;
end;
function TNTLM.GetMensaje3(ADomain, AHost, AUser,
APassword: String; ANonce: Array of Byte): String;
var
Msg: TNTLM_Message3;
MessageAux: String;
LM_Resp: String[30];
NT_Resp: String[30];
Encryption: IEncryption;
begin
Encryption := TEncryption.Create;
ADomain := Unicode( UpperCase( ADomain ) );
AHost := Unicode( UpperCase( AHost ) );
AUser := Unicode( AUser );
FillChar( Msg, Sizeof( Msg ), #0 );
with Msg do
begin
Move( 'NTLMSSP' + #0, Protocol, 8 );
MsgType := #3;
LenDomain1 := Length( ADomain );
LenDomain2 := LenDomain1;
OffSetDomain := $40;
LenUser1 := Length( AUser );
LenUser2 := LenUser1;
OffSetUser := OffSetDomain + LenDomain1;
LenHost1 := Length( AHost );
LenHost2 := LenHost1;
OffSetHost := OffsetUser + LenUser1;
Len_LM_Resp1 := $18;
Len_LM_Resp2 := Len_LM_Resp1;
OffSet_LM_Resp := OffsetHost + LenHost1;
Len_NT_Resp1 := $18;
Len_NT_Resp2 := Len_NT_Resp1;
OffSet_NT_Resp := OffSet_LM_Resp + Len_LM_Resp1;
LenMessage := Offset_NT_Resp + Len_NT_Resp1;
Flags := 33281;
end;
LM_Resp := GetLMHash( APassword, ANonce );
NT_Resp := GetNTHash( APassword, ANonce );
SetLength( MessageAux, sizeof( Msg ) );
Move( Msg, MessageAux[1], sizeof( Msg ) );
MessageAux := MessageAux + ADomain + AUser + AHost + LM_Resp + NT_Resp;
Result := Encryption.StrToBase64( MessageAux );
end;
function TNTLM.GetLMHash(APassword: String; ANonce: Array of Byte): String;
const
magic: array [0..7] of Byte = ($4B, $47, $53, $21, $40, $23, $24, $25 );
var
i: Integer;
Encryption: IEncryption;
PassHash: String;
begin
Encryption := TEncryption.Create;
APassword := UpperCase( APassword );
if Length( APassword ) >= 14 then
SetLength( APassword, 14 )
else
for i := Length( APassword ) to 14 do
APassword := APassword + #0;
PassHash := '';
PassHash := Encryption.DesEcbEncrypt( Copy( APassword, 1, 7 ), magic );
PassHash := PassHash + Encryption.DesEcbEncrypt( Copy( APassword, 8, 7 ), magic );
PassHash := PassHash + #0#0#0#0#0;
Result := Encryption.DesEcbEncrypt( Copy( PassHash, 1, 7 ), ANonce );
Result := Result + Encryption.DesEcbEncrypt( Copy( PassHash, 8, 7 ), ANonce );
Result := Result + Encryption.DesEcbEncrypt( Copy( PassHash, 15, 7 ), ANonce );
end;
function TNTLM.GetNTHash(APassword: String; ANonce: Array of byte): String;
var
Pass: String;
PassHash: String;
Context: PMD4Ctx;
Encryption: IEncryption;
begin
Encryption := TEncryption.Create;
Pass := Unicode( APassword );
with Encryption do
begin
GetMem( Context, SizeOf( TMD4Ctx ) );
MDInit( Context );
MDUpdate( Context, PChar(Pass), Length( Pass ) );
PassHash := MDFinal( Context );
PassHash := PassHash + #0#0#0#0#0;
FreeMem(Context, SizeOf(TMD4Ctx));
Result := Encryption.DesEcbEncrypt( Copy( PassHash, 1, 7 ), ANonce );
Result := Result + Encryption.DesEcbEncrypt( Copy( PassHash, 8, 7 ), ANonce );
Result := Result + Encryption.DesEcbEncrypt( Copy( PassHash, 15, 7 ), ANonce );
end;
end;
function TNTLM.Unicode(AData: String): String;
var
Data: String;
i: Integer;
begin
Data := '';
for i := 1 to Length( AData ) do
Data := Data + AData[i] + #0;
Result := Data;
end;
function TNTLM.ReverseMessage1(AString: string): TNTLM_Message1;
var
Msg: TNTLM_Message1;
NTLMReply: String;
Encryption: IEncryption;
begin
Encryption := TEncryption.Create;
NTLMReply := Encryption.Base64toStr( AString );
Move( NTLMReply[1], Msg, sizeof( Msg ) );
Result := Msg;
end;
end.
Code
unit Encryption;
interface
uses
SysUtils, Math;
type
PMD4Ctx = ^TMD4Ctx;
TMD4Ctx = record
state: array[0..3] of LongWord;
count: array[0..1] of LongWord;
buffer: array[0..63] of Byte;
end;
PByteArray = ^TByteArray;
TByteArray = array[0..0] of Byte;
PDWordArray = ^TDWordArray;
TDWordArray = array[0..0] of LongWord;
IEncryption = Interface
['{3B5BA6D3-CC96-11D6-A883-0002B30B8C0F}']
procedure MDInit(context: PMD4Ctx);
procedure MDUpdate(context: PMD4Ctx; input: Pointer; inputLen: LongWord);
function MDFinal(context: PMD4Ctx): String;
function StrToBase64( const Buffer: String ): String;
function Base64ToStr( const Buffer: String ): String;
function DesEcbEncrypt( AKey: String; AData: Array of byte ): String;
end;
TEncryption = Class( TInterfacedObject, IEncryption )
private
FRoundKeys : Array [1..16, 1..48] of Byte;
FC: Array [1..28] of Byte;
FD: Array [1..28] of Byte;
FInputValue : Array [1..64] of Byte;
FOutputValue : Array [1..64] of Byte;
FL, FR, FfunctionResult : Array [1..32] of Byte;
FKey: String;
FSmallBuffer: Array[0..63] of BYTE;
procedure MD4Transform (var state: array of LongWord; block: Pointer);
procedure MDEncode(output, input: Pointer; len: LongWord);
procedure MDDecode(output, input: Pointer; len: LongWord);
procedure FF(var a: LongWord; b, c, d, x, s: LongWord);
procedure GG(var a: LongWord; b, c, d, x, s: LongWord);
procedure HH(var a: LongWord; b, c, d, x, s: LongWord);
procedure DF( var FK );
procedure SetBit( var Data; Index, Value: Byte );
function GetBit( var Data; Index : Byte ): Byte;
procedure Shift( var SubKeyPart );
procedure SubKey( Round : Byte; var SubKey );
procedure SetKeys;
procedure EncipherBLOCK;
public
function StrToBase64( const Buffer: String ): String;
function Base64ToStr( const Buffer: String ): String;
procedure MDInit(context: PMD4Ctx);
procedure MDUpdate(context: PMD4Ctx; input: Pointer; inputLen: LongWord);
function MDFinal(context: PMD4Ctx): String;
function DesEcbEncrypt( AKey: String; AData: Array of byte ): String;
end;
implementation
const
IP : Array [1..64] of Byte =( 58,50,42,34,26,18,10,2,
60,52,44,36,28,20,12,4,
62,54,46,38,30,22,14,6,
64,56,48,40,32,24,16,8,
57,49,41,33,25,17, 9,1,
59,51,43,35,27,19,11,3,
61,53,45,37,29,21,13,5,
63,55,47,39,31,23,15,7);
InvIP : Array [1..64] of Byte =( 40, 8,48,16,56,24,64,32,
39, 7,47,15,55,23,63,31,
38, 6,46,14,54,22,62,30,
37, 5,45,13,53,21,61,29,
36, 4,44,12,52,20,60,28,
35, 3,43,11,51,19,59,27,
34, 2,42,10,50,18,58,26,
33, 1,41, 9,49,17,57,25);
E : Array [1..48] of Byte =( 32, 1, 2, 3, 4, 5,
4, 5, 6, 7, 8, 9,
8, 9,10,11,12,13,
12,13,14,15,16,17,
16,17,18,19,20,21,
20,21,22,23,24,25,
24,25,26,27,28,29,
28,29,30,31,32, 1);
P : Array [1..32] of Byte =( 16, 7,20,21,
29,12,28,17,
1,15,23,26,
5,18,31,10,
2, 8,24,14,
32,27, 3, 9,
19,13,30, 6,
22,11, 4,25);
SBoxes : Array [1..8,0..3,0..15] of Byte =
( ((14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7),
( 0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8),
( 4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0),
( 15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13)),
((15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10),
( 3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5),
( 0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15),
( 13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9)),
((10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8),
( 13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1),
( 13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7),
( 1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12)),
(( 7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15),
( 13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9),
( 10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4),
( 3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14)),
(( 2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9),
( 14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6),
( 4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14),
( 11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3)),
((12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11),
( 10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8),
( 9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6),
( 4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13)),
(( 4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1),
( 13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6),
( 1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2),
( 6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12)),
((13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7),
( 1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2),
( 7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8),
( 2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11)));
PC_1 : Array [1..56] of Byte =( 57,49,41,33,25,17, 9,
1,58,50,42,34,26,18,
10, 2,59,51,43,35,27,
19,11, 3,60,52,44,36,
63,55,47,39,31,23,15,
7,62,54,46,38,30,22,
14, 6,61,53,45,37,29,
21,13, 5,28,20,12, 4);
PC_2 : Array [1..48] of Byte =( 14,17,11,24, 1, 5,
3,28,15, 6,21,10,
23,19,12, 4,26, 8,
16, 7,27,20,13, 2,
41,52,31,37,47,55,
30,40,51,45,33,48,
44,49,39,56,34,53,
46,42,50,36,29,32);
ShiftTable : Array [1..16] of Byte =( 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1);
PI_SUBST: array[0..255] of Byte = (
41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
31, 26, 219, 153, 141, 51, 159, 17, 131, 20
);
const
MD_PADDING: array[0..63] of Byte = (
$80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
);
S11 = 3;
S12 = 7;
S13 = 11;
S14 = 19;
S21 = 3;
S22 = 5;
S23 = 9;
S24 = 13;
S31 = 3;
S32 = 9;
S33 = 11;
S34 = 15;
function rol(x: LongWord; y: Byte): LongWord; assembler;
asm
mov cl,dl
rol eax,cl
end;
function F(x, y, z: LongWord): LongWord; assembler;
asm
and edx,eax
not eax
and eax,ecx
or eax,edx
end;
function G(x, y, z: LongWord): LongWord; assembler;
asm
push ecx
and ecx,eax
and eax,edx
or eax,ecx
pop ecx
and edx,ecx
or eax,edx
end;
function H(x, y, z: LongWord): LongWord; assembler;
asm
xor eax,edx
xor eax,ecx
end;
function TEncryption.StrToBase64(const Buffer: String): String;
const
Codes = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var
iRest, iLen, iQuad: Integer;
Byte3: array[0..2] of Byte;
sBuffer: String;
begin
Result := '';
SetLength( sBuffer, 4 * ( ( Length( Buffer ) + 2 ) div 3 ) );
FillChar( sBuffer[1], Length( sBuffer ), 0 );
iQuad := 0;
iLen := Length(Buffer);
iRest := iLen;
while iRest > 0 do
begin
Move(Buffer[iLen - iRest + 1], Byte3, Trunc(Min(3, iRest)));
sBuffer[iQuad + 1] := Codes[(Byte3[0] div 4) + 1];
if iRest > 1 then
begin
sBuffer[iQuad + 2] := Codes[(Byte3[0] mod 4) * 16 + (Byte3[1] div 16) + 1];
if iRest > 2 then
begin
sBuffer[iQuad + 3] := Codes[(Byte3[1] mod 16) * 4 + (Byte3[2] div 64) + 1];
sBuffer[iQuad + 4] := Codes[Byte3[2] mod 64 + 1];
end else
begin
sBuffer[iQuad + 3] := Codes[(Byte3[1] mod 16) * 4 + 1];
sBuffer[iQuad + 4] := '=';
end;
end else
begin
sBuffer[iQuad + 2] := Codes[(Byte3[0] mod 4) * 16 + 1];
sBuffer[iQuad + 3] := '=';
sBuffer[iQuad + 4] := '=';
end;
Inc(iQuad, 4);
Dec(iRest, 3);
end;
Result := Trim(sBuffer);
end;
function TEncryption.Base64ToStr(const Buffer: String): String;
var
i, iCount, iIdx, iLen, iBuild: Integer;
EndReached: Boolean;
Ptr: PChar;
begin
Result := '';
SetLength( Result, 3 * ( Length( Buffer ) + 3 ) div 4 );
iIdx := 0;
iLen := 0;
iBuild := 0;
iCount := 3;
EndReached := false;
Ptr := @Result[ 1 ];
for i := 1 to Length(Buffer) do
begin
Inc(iIdx);
case Buffer[i] of
'A'..'Z': iBuild := ( iBuild shl 6 ) + Ord(Buffer[i]) - 65;
'a'..'z': iBuild := ( iBuild shl 6 ) + Ord(Buffer[i]) - 71;
'0'..'9': iBuild := ( iBuild shl 6 ) + Ord(Buffer[i]) + 4;
'+': iBuild := ( iBuild shl 6 ) + 62;
'/': iBuild := ( iBuild shl 6 ) + 63;
'=':
begin
if not EndReached then
case iIdx of
1: iCount := 0;
2: iCount := 0;
3: iCount := 1;
4: iCount := 2;
end;
EndReached := true;
end;
end;
if iIdx = 4 then
begin
Ptr[ 0 ] := Char( iBuild shr 16 );
Ptr[ 1 ] := Char( ( iBuild shr 8 ) and $FF );
Ptr[ 2 ] := Char( iBuild and $FF );
Inc( Ptr, 3 );
Inc( iLen, iCount );
iCount := 3;
iBuild := 0;
iIdx := 0;
EndReached := false;
end;
end;
if ( iLen <> Length(Result) ) then
SetLength(Result, iLen);
end;
procedure TEncryption.FF(var a: LongWord; b, c, d, x, s: LongWord);
begin
a := a + (F(b, c, d) + x);
a := rol(a, s);
end;
procedure TEncryption.GG(var a: LongWord; b, c, d, x, s: LongWord);
begin
a := a + G(b, c, d) + x + $5a827999;
a := rol(a, s);
end;
procedure TEncryption.HH(var a: LongWord; b, c, d, x, s: LongWord);
begin
a := a + H(b, c, d) + x + $6ed9eba1;
a := rol(a, s);
end;
procedure TEncryption.MDInit(context: PMD4Ctx);
begin
context^.count[0] := 0;
context^.count[1] := 0;
context^.state[0] := $67452301;
context^.state[1] := $efcdab89;
context^.state[2] := $98badcfe;
context^.state[3] := $10325476;
end;
procedure TEncryption.MDEncode(output, input: Pointer; len: LongWord);
var
i, j: LongWord;
begin
i := 0; j := 0;
while j < len do
begin
PByteArray(output)^[j] := (PDWordArray(input)^[i] and $ff);
PByteArray(output)^[j + 1] := ((PDWordArray(input)^[i] shr 8) and $ff);
PByteArray(output)^[j + 2] := ((PDWordArray(input)^[i] shr 16) and $ff);
PByteArray(output)^[j + 3] := ((PDWordArray(input)^[i] shr 24) and $ff);
Inc(i); Inc(j, 4);
end;
end;
procedure TEncryption.MDDecode(output, input: Pointer; len: LongWord);
var
i, j: LongWord;
begin
i := 0; j := 0;
while j < len do
begin
PDWordArray(output)^[i] := PByteArray(input)^[j] or (PByteArray(input)^[j + 1] shl 8) or (PByteArray(input)^[j + 2] shl 16) or (PByteArray(input)^[j + 3] shl 24);
Inc(i); Inc(j, 4);
end;
end;
procedure TEncryption.MD4Transform (var state: array of LongWord; block: Pointer);
var
a, b, c, d: LongWord;
x: array[0..15] of LongWord;
begin
a := state[0]; b := state[1]; c := state[2]; d := state[3];
MDDecode(@x, block, 64);
FF (a, b, c, d, x[ 0], S11);
FF (d, a, b, c, x[ 1], S12);
FF (c, d, a, b, x[ 2], S13);
FF (b, c, d, a, x[ 3], S14);
FF (a, b, c, d, x[ 4], S11);
FF (d, a, b, c, x[ 5], S12);
FF (c, d, a, b, x[ 6], S13);
FF (b, c, d, a, x[ 7], S14);
FF (a, b, c, d, x[ 8], S11);
FF (d, a, b, c, x[ 9], S12);
FF (c, d, a, b, x[10], S13);
FF (b, c, d, a, x[11], S14);
FF (a, b, c, d, x[12], S11);
FF (d, a, b, c, x[13], S12);
FF (c, d, a, b, x[14], S13);
FF (b, c, d, a, x[15], S14);
GG (a, b, c, d, x[ 0], S21);
GG (d, a, b, c, x[ 4], S22);
GG (c, d, a, b, x[ 8], S23);
GG (b, c, d, a, x[12], S24);
GG (a, b, c, d, x[ 1], S21);
GG (d, a, b, c, x[ 5], S22);
GG (c, d, a, b, x[ 9], S23);
GG (b, c, d, a, x[13], S24);
GG (a, b, c, d, x[ 2], S21);
GG (d, a, b, c, x[ 6], S22);
GG (c, d, a, b, x[10], S23);
GG (b, c, d, a, x[14], S24);
GG (a, b, c, d, x[ 3], S21);
GG (d, a, b, c, x[ 7], S22);
GG (c, d, a, b, x[11], S23);
GG (b, c, d, a, x[15], S24);
HH (a, b, c, d, x[ 0], S31);
HH (d, a, b, c, x[ 8], S32);
HH (c, d, a, b, x[ 4], S33);
HH (b, c, d, a, x[12], S34);
HH (a, b, c, d, x[ 2], S31);
HH (d, a, b, c, x[10], S32);
HH (c, d, a, b, x[ 6], S33);
HH (b, c, d, a, x[14], S34);
HH (a, b, c, d, x[ 1], S31);
HH (d, a, b, c, x[ 9], S32);
HH (c, d, a, b, x[ 5], S33);
HH (b, c, d, a, x[13], S34);
HH (a, b, c, d, x[ 3], S31);
HH (d, a, b, c, x[11], S32);
HH (c, d, a, b, x[ 7], S33);
HH (b, c, d, a, x[15], S34);
state[0] := state[0] + a;
state[1] := state[1] + b;
state[2] := state[2] + c;
state[3] := state[3] + d;
end;
procedure TEncryption.MDUpdate(context: PMD4Ctx; input: Pointer; inputLen: LongWord);
var
i, index, partLen: LongWord;
begin
index := (context^.count[0] shr 3) and $3F;
context^.count[0] := context^.count[0] + inputLen shl 3;
if (context^.count[0] < (inputLen shl 3)) then
Inc(context^.count[1]);
context^.count[1] := context^.count[1] + inputLen shr 29;
partLen := 64 - index;
if (inputLen >= partLen) then
begin
Move(input^, context^.buffer[index], partLen);
MD4Transform(context^.state, @context^.buffer);
i := partLen;
while i + 63 < inputLen do
begin
MD4Transform(context^.state, Addr(PByteArray(input)^[i]));
Inc(i, 64);
end;
index := 0;
end
else
i := 0;
Move(PByteArray(input)^[i], context^.buffer[index], inputLen - i);
end;
function TEncryption.MDFinal(context: PMD4Ctx): String;
var
digest: array[0..15] of Char;
bits: array[0..7] of Char;
index, padLen: LongWord;
begin
MDEncode(@bits, @context^.count, 8);
index := (context^.count[0] shr 3) and $3f;
if (index < 56) then
padLen := 56 - index
else
padLen := 120 - index;
MDUpdate(context, @MD_PADDING, padLen);
MDUpdate(context, @bits, 8);
MDEncode(@digest, @context^.state, 16);
FillChar(context^, 0, SizeOf(TMD4Ctx));
Result := Digest;
end;
function TEncryption.GetBit(var Data; Index: Byte): Byte;
var
Bits: Array [0..7] of Byte absolute Data;
begin
Dec( Index );
if Bits[Index div 8] and ( 128 shr( Index mod 8 ) ) > 0 then
GetBit := 1
else
GetBit := 0;
end;
procedure TEncryption.SetBit( var Data; Index, Value : Byte );
var
Bits: Array [0..7] Of Byte absolute Data;
Bit: Byte;
begin
Dec( Index );
Bit := 128 shr( Index mod 8 );
case Value of
0: Bits[Index div 8] := Bits[Index div 8] and ( not Bit );
1: Bits[Index div 8] := Bits[Index div 8] or Bit;
end;
end;
procedure TEncryption.DF( var FK );
var
K : Array [1..48] Of Byte absolute FK;
Temp1 : Array [1..48] Of Byte;
Temp2 : Array [1..32] Of Byte;
n, h, i, j, Row, Column : Integer;
begin
for n:=1 to 48 do
Temp1[n]:=FR[E[n]] xor K[n];
for n:=1 to 8 do
begin
i := ( n - 1 ) * 6;
j := ( n -1 ) * 4;
Row := Temp1[i+1] * 2 + Temp1[i+6];
Column := Temp1[i+2] * 8 + Temp1[i+3] * 4 + Temp1[i+4] * 2 + Temp1[i+5];
for h := 1 to 4 Do
begin
case h of
1: Temp2[j+h] := ( SBoxes[n,Row,Column] and 8 ) div 8;
2: Temp2[j+h] := ( SBoxes[n,Row,Column] and 4 ) div 4;
3: Temp2[j+h] := ( SBoxes[n,Row,Column] and 2 ) div 2;
4: Temp2[j+h] := ( SBoxes[n,Row,Column] and 1 );
end;
end;
end;
for n := 1 to 32 do
FfunctionResult[n] := Temp2[P[n]];
end;
procedure TEncryption.Shift( var SubKeyPart );
var
SKP: Array [1..28] Of Byte absolute SubKeyPart;
n, b: Byte;
begin
b := SKP[1];
for n := 1 to 27 do
SKP[n] := SKP[n+1];
SKP[28] := b;
end;
procedure TEncryption.SubKey( Round: Byte; var SubKey );
var
SK : Array [1..48] of Byte absolute SubKey;
n, b : Byte;
begin
for n := 1 to ShiftTable[Round] do
begin
Shift( FC );
Shift( FD );
end;
for n := 1 to 48 do
begin
b := PC_2[n];
if b <= 28 then
SK[n] := FC[b]
else
SK[n] := FD[b-28];
end;
end;
procedure TEncryption.SetKeys;
var
n: Byte;
Key: Array [0..7] of Byte;
begin
move( FKey[1], Key, 8 );
for n := 1 to 28 do
begin
FC[n] := GetBit( Key, PC_1[n] );
FD[n] := GetBit( Key, PC_1[n+28] );
end;
for n := 1 to 16 do
SubKey( n,FRoundKeys[n] );
end;
procedure TEncryption.EncipherBlock;
var
n, b, Round : Byte;
begin
for n := 1 to 64 do
FInputValue[n]:=GetBit( FSmallBuffer, n );
for n := 1 to 64 do
if n <= 32 then
FL[n] := FInputValue[IP[n]]
else
FR[n-32] := FInputValue[IP[n]];
for Round := 1 to 16 do
begin
DF( FRoundKeys[Round] );
For n := 1 to 32 do
FfunctionResult[n] := FfunctionResult[n] xor FL[n];
FL := FR;
FR := FfunctionResult;
end;
for n := 1 to 64 do
begin
b := InvIP[n];
if b <= 32 then
FOutputValue[n] := FR[b]
else
FOutputValue[n] := FL[b-32];
end;
for n := 1 to 64 do
SetBit( FSmallBuffer, n, FOutputValue[n] );
end;
function TEncryption.DesEcbEncrypt(AKey: String; AData: Array of byte): String;
var
i, j, t, bit: Integer;
begin
SetLength( FKey, 8 );
FKey[1] := AKey[1];
FKey[2] := char( ( ( Byte( AKey[1] ) shl 7 ) and $FF ) or ( Byte( AKey[2] ) shr 1 ) );
FKey[3] := char( ( ( Byte( AKey[2] ) shl 6 ) and $FF ) or ( Byte( AKey[3] ) shr 2 ) );
FKey[4] := char( ( ( Byte( AKey[3] ) shl 5 ) and $FF ) or ( Byte( AKey[4] ) shr 3 ) );
FKey[5] := char( ( ( Byte( AKey[4] ) shl 4 ) and $FF ) or ( Byte( AKey[5] ) shr 4 ) );
FKey[6] := char( ( ( Byte( AKey[5] ) shl 3 ) and $FF ) or ( Byte( AKey[6] ) shr 5 ) );
FKey[7] := char( ( ( Byte( AKey[6] ) shl 2 ) and $FF ) or ( Byte( AKey[7] ) shr 6 ) );
FKey[8] := char( ( ( Byte( AKey[7] ) shl 1 ) and $FF ) );
for i := 1 to 8 do
begin
for j := 1 to 7 do
begin
bit := 0;
t := Byte( Fkey[i] ) shl j;
bit :=( t xor bit) and $1;
end;
Fkey[i] := char( ( Byte( Fkey[i] ) and $FE ) or bit );
end;
SetKeys;
SetLength( Result, 8 );
move( AData, FSmallBuffer, 8 );
EncipherBlock;
move( FSmallBuffer, Result[1], 8 );
end;
end.
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