Arsip: Component MD5


by Starboard in Articles more 14 years ago 1980
ini, MD5 yang udah aku buat component, moga ajah bisa membantu.

untuk cara pakenya gini.
pass compare password
if CompareStr(MD51.MD5Print(MD51.MD5String(ed_user.Text)),pass)=0 then

Untuk Client:
// -----------------------------------------------------------------------------------------------
//
//                                 MD5 Message-Digest for Delphi 4
//
//                                 Delphi 4 Unit implementing the
//                      RSA Data Security, Inc. MD5 Message-Digest Algorithm
//
//                          Implementation of Ronald L. Rivest's RFC 1321
//
//                      Copyright © 1997-1999 Medienagentur Fichtner & Meyer
//                                  Written by Matthias Fichtner
//
// -----------------------------------------------------------------------------------------------
//               See RFC 1321 for RSA Data Security's copyright and license notice!
// -----------------------------------------------------------------------------------------------
//
//     14-Jun-97  mf  Implemented MD5 according to RFC 1321                           RFC 1321
//     16-Jun-97  mf  Initial release of the compiled unit (no source code)           RFC 1321
//     28-Feb-99  mf  Added MD5Match function for comparing two digests               RFC 1321
//     13-Sep-99  mf  Reworked the entire unit                                        RFC 1321
//     17-Sep-99  mf  Reworked the "Test Driver" project                              RFC 1321
//     19-Sep-99  mf  Release of sources for MD5 unit and "Test Driver" project       RFC 1321
//
// -----------------------------------------------------------------------------------------------
//                   The latest release of md5.pas will always be available from
//                  the distribution site at: http://www.fichtner.net/delphi/md5/
// -----------------------------------------------------------------------------------------------
//                       Please send questions, bug reports and suggestions
//                      regarding this code to: mfichtner@fichtner-meyer.com
// -----------------------------------------------------------------------------------------------
//                        This code is provided "as is" without express or
//                     implied warranty of any kind. Use it at your own risk.
// -----------------------------------------------------------------------------------------------
unit MyMD5;
interface
uses
SysUtils, Classes,Windows;
const
FAuthors = 'Medienagentur Fichtner & Meyer';
FWriten  = 'Matthias Fichtner';
FCreatedby = 'Kiyat Yuni Saptoko';
FVersion = '19 Sep 1999';
FSite = 'www.fichtner.net/delphi/md5/';
type
TDigType  = (MDString,MDFile);
MD5Count = array[0..1] of DWORD;
MD5State = array[0..3] of DWORD;
MD5Block = array[0..15] of DWORD;
MD5CBits = array[0..7] of byte;
MD5Digest = array[0..15] of byte;
MD5Buffer = array[0..63] of byte;
MD5Context = record
State: MD5State;
Count: MD5Count;
Buffer: MD5Buffer;
end;
TMD5 = class(TComponent)
private
FxCreatedby: string;
FxVersion: string;
FxAuthors: string;
FxSite: string;
FxWritenby: string;
FDigestNow: Boolean;
FDigestType: TDigType;
FDigestResult: string;
FSourceString: string;
FSourceFile: TFileName;
procedure SetxAuthors(const Value: string);
procedure SetxCreatedby(const Value: string);
procedure SetxVersion(const Value: string);
procedure SetxSite(const Value: string);
procedure SetxWritenby(const Value: string);
procedure SetDigestNow(const Value: Boolean);
procedure SetDigestType(const Value: TDigType);
procedure SetDigestResult(const Value: string);
procedure SetSourceString(const Value: string);
procedure SetSourceFile(const Value: TFileName);
{ Private declarations }
protected
{ Protected declarations }
procedure MD5Init(var Context: MD5Context);
function MD5Match(D1, D2: MD5Digest): boolean;
procedure Decode(Source, Target: pointer; Count: longword);
procedure Transform(Buffer: pointer; var State: MD5State);
procedure Encode(Source, Target: pointer; Count: longword);
public
{ Public declarations }
procedure MD5Update(var Context: MD5Context; Input: pChar; Length: longword);
procedure MD5Final(var Context: MD5Context; var Digest: MD5Digest);
function MD5String(M: string): MD5Digest;
function MD5File(N: string): MD5Digest;
function MD5Print(D: MD5Digest): string;
constructor Create(aOwner: TComponent); override;
destructor Destroy();override;
published
{ Published declarations }
property xVersion : string read FxVersion write SetxVersion;
property xAuthors : string read FxAuthors write SetxAuthors;
property xSite    : string read FxSite write SetxSite;
property xCreatedby : string read FxCreatedby write SetxCreatedby;
property xWritenby : string read FxWritenby write SetxWritenby;
property DigestNow : Boolean read FDigestNow write SetDigestNow;
property DigestType : TDigType read FDigestType write SetDigestType;
property DigestResult : string read FDigestResult write SetDigestResult;
property SourceString : string read FSourceString write SetSourceString;
property SourceFile   : TFileName read FSourceFile write SetSourceFile;
end;
procedure Register;
implementation
var
PADDING: MD5Buffer = (
$80, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00,
$00, $00, $00, $00, $00, $00, $00, $00
);
procedure Register;
begin
RegisterComponents('Kiyat', [TMD5]);
end;
{ TMD5 }
constructor TMD5.Create(aOwner: TComponent);
begin
inherited;
FxCreatedby :=FCreatedby;
FxVersion := FVersion;
FxAuthors := FAuthors;
FxSite := FSite;
FxWritenby := FWriten;
end;
function F(x, y, z: DWORD): DWORD;
begin
Result := (x and y) or ((not x) and z);
end;
function G(x, y, z: DWORD): DWORD;
begin
Result := (x and z) or (y and (not z));
end;
function H(x, y, z: DWORD): DWORD;
begin
Result := x xor y xor z;
end;
function I(x, y, z: DWORD): DWORD;
begin
Result := y xor (x or (not z));
end;
procedure rot(var x: DWORD; n: BYTE);
begin
x := (x shl n) or (x shr (32 - n));
end;
procedure FF(var a: DWORD; b, c, d, x: DWORD; s: BYTE; ac: DWORD);
begin
inc(a, F(b, c, d) + x + ac);
rot(a, s);
inc(a, b);
end;
procedure GG(var a: DWORD; b, c, d, x: DWORD; s: BYTE; ac: DWORD);
begin
inc(a, G(b, c, d) + x + ac);
rot(a, s);
inc(a, b);
end;
procedure HH(var a: DWORD; b, c, d, x: DWORD; s: BYTE; ac: DWORD);
begin
inc(a, H(b, c, d) + x + ac);
rot(a, s);
inc(a, b);
end;
procedure II(var a: DWORD; b, c, d, x: DWORD; s: BYTE; ac: DWORD);
begin
inc(a, I(b, c, d) + x + ac);
rot(a, s);
inc(a, b);
end;
function TMD5.MD5File(N: string): MD5Digest;
var
FileHandle: THandle;
MapHandle: THandle;
ViewPointer: pointer;
Context: MD5Context;
begin
MD5Init(Context);
FileHandle := CreateFile(pChar(N), GENERIC_READ, FILE_SHARE_READ or FILE_SHARE_WRITE,
nil, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL or FILE_FLAG_SEQUENTIAL_SCAN, 0);
if FileHandle <> INVALID_HANDLE_VALUE then try
MapHandle := CreateFileMapping(FileHandle, nil, PAGE_READONLY, 0, 0, nil);
if MapHandle <> 0 then try
ViewPointer := MapViewOfFile(MapHandle, FILE_MAP_READ, 0, 0, 0);
if ViewPointer <> nil then try
MD5Update(Context, ViewPointer, GetFileSize(FileHandle, nil));
finally
UnmapViewOfFile(ViewPointer);
end;
finally
CloseHandle(MapHandle);
end;
finally
CloseHandle(FileHandle);
end;
MD5Final(Context, Result);
end;
procedure TMD5.MD5Final(var Context: MD5Context; var Digest: MD5Digest);
var
Bits: MD5CBits;
Index: longword;
PadLen: longword;
begin
Decode(@Context.Count, @Bits, 2);
Index := (Context.Count[0] shr 3) and $3f;
if Index < 56 then PadLen := 56 - Index else PadLen := 120 - Index;
MD5Update(Context, @PADDING, PadLen);
MD5Update(Context, @Bits, 8);
Decode(@Context.State, @Digest, 4);
ZeroMemory(@Context, SizeOf(MD5Context));
end;
procedure TMD5.MD5Init(var Context: MD5Context);
begin
with Context do begin
State[0] := $67452301;
State[1] := $efcdab89;
State[2] := $98badcfe;
State[3] := $10325476;
Count[0] := 0;
Count[1] := 0;
ZeroMemory(@Buffer, SizeOf(MD5Buffer));
end;
end;
function TMD5.MD5Match(D1, D2: MD5Digest): boolean;
var
I: byte;
begin
I := 0;
Result := TRUE;
while Result and (I < 16) do begin
Result := D1[I] = D2[I];
inc(I);
end;
end;
function TMD5.MD5Print(D: MD5Digest): string;
var
I: byte;
const
Digits: array[0..15] of char =
('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
begin
Result := '';
for I := 0 to 15 do Result := Result + Digits[(D[I] shr 4) and $0f] + Digits[D[I] and $0f];
end;
function TMD5.MD5String(M: string): MD5Digest;
var
Context: MD5Context;
begin
MD5Init(Context);
MD5Update(Context, pChar(M), length(M));
MD5Final(Context, Result);
end;
procedure TMD5.MD5Update(var Context: MD5Context; Input: pChar;
Length: longword);
var
Index: longword;
PartLen: longword;
I: longword;
begin
with Context do begin
Index := (Count[0] shr 3) and $3f;
inc(Count[0], Length shl 3);
if Count[0] < (Length shl 3) then inc(Count[1]);
inc(Count[1], Length shr 29);
end;
PartLen := 64 - Index;
if Length >= PartLen then begin
CopyMemory(@Context.Buffer[Index], Input, PartLen);
Transform(@Context.Buffer, Context.State);
I := PartLen;
while I + 63 < Length do begin
Transform(@Input[I], Context.State);
inc(I, 64);
end;
Index := 0;
end else I := 0;
CopyMemory(@Context.Buffer[Index], @Input[I], Length - I);
end;
procedure TMD5.SetDigestNow(const Value: Boolean);
begin
FDigestNow := Value;
if  FDigestNow = True then
case FDigestType of
MDString  : FDigestResult := MD5Print(MD5String(FSourceString));
MDFile    : FDigestResult := MD5Print(MD5File(FSourceFile));
end;
end;
procedure TMD5.SetDigestResult(const Value: string);
begin
FDigestResult := Value;
end;
procedure TMD5.SetDigestType(const Value: TDigType);
begin
FDigestType := Value;
end;
procedure TMD5.SetSourceString(const Value: string);
begin
FSourceString := Value;
end;
procedure TMD5.SetxAuthors(const Value: string);
begin
FxAuthors := Value;
end;
procedure TMD5.SetxCreatedby(const Value: string);
begin
FxCreatedby := Value;
end;
procedure TMD5.SetxSite(const Value: string);
begin
FxSite := Value;
end;
procedure TMD5.SetxVersion(const Value: string);
begin
FxVersion := Value;
end;
procedure TMD5.SetxWritenby(const Value: string);
begin
FxWritenby := Value;
end;
procedure TMD5.Decode(Source, Target: pointer; Count: longword);
var
S: PDWORD;
T: PByte;
I: longword;
begin
S := Source;
T := Target;
for I := 1 to Count do begin
T^ := S^ and $ff;
inc(T);
T^ := (S^ shr 8) and $ff;
inc(T);
T^ := (S^ shr 16) and $ff;
inc(T);
T^ := (S^ shr 24) and $ff;
inc(T);
inc(S);
end;
end;
// Transform State according to first 64 bytes at Buffer
procedure TMD5.Transform(Buffer: pointer; var State: MD5State);
var
a, b, c, d: DWORD;
Block: MD5Block;
begin
Encode(Buffer, @Block, 64);
a := State[0];
b := State[1];
c := State[2];
d := State[3];
FF (a, b, c, d, Block[ 0],  7, $d76aa478);
FF (d, a, b, c, Block[ 1], 12, $e8c7b756);
FF (c, d, a, b, Block[ 2], 17, $242070db);
FF (b, c, d, a, Block[ 3], 22, $c1bdceee);
FF (a, b, c, d, Block[ 4],  7, $f57c0faf);
FF (d, a, b, c, Block[ 5], 12, $4787c62a);
FF (c, d, a, b, Block[ 6], 17, $a8304613);
FF (b, c, d, a, Block[ 7], 22, $fd469501);
FF (a, b, c, d, Block[ 8],  7, $698098d8);
FF (d, a, b, c, Block[ 9], 12, $8b44f7af);
FF (c, d, a, b, Block[10], 17, $ffff5bb1);
FF (b, c, d, a, Block[11], 22, $895cd7be);
FF (a, b, c, d, Block[12],  7, $6b901122);
FF (d, a, b, c, Block[13], 12, $fd987193);
FF (c, d, a, b, Block[14], 17, $a679438e);
FF (b, c, d, a, Block[15], 22, $49b40821);
GG (a, b, c, d, Block[ 1],  5, $f61e2562);
GG (d, a, b, c, Block[ 6],  9, $c040b340);
GG (c, d, a, b, Block[11], 14, $265e5a51);
GG (b, c, d, a, Block[ 0], 20, $e9b6c7aa);
GG (a, b, c, d, Block[ 5],  5, $d62f105d);
GG (d, a, b, c, Block[10],  9,  $2441453);
GG (c, d, a, b, Block[15], 14, $d8a1e681);
GG (b, c, d, a, Block[ 4], 20, $e7d3fbc8);
GG (a, b, c, d, Block[ 9],  5, $21e1cde6);
GG (d, a, b, c, Block[14],  9, $c33707d6);
GG (c, d, a, b, Block[ 3], 14, $f4d50d87);
GG (b, c, d, a, Block[ 8], 20, $455a14ed);
GG (a, b, c, d, Block[13],  5, $a9e3e905);
GG (d, a, b, c, Block[ 2],  9, $fcefa3f8);
GG (c, d, a, b, Block[ 7], 14, $676f02d9);
GG (b, c, d, a, Block[12], 20, $8d2a4c8a);
HH (a, b, c, d, Block[ 5],  4, $fffa3942);
HH (d, a, b, c, Block[ 8], 11, $8771f681);
HH (c, d, a, b, Block[11], 16, $6d9d6122);
HH (b, c, d, a, Block[14], 23, $fde5380c);
HH (a, b, c, d, Block[ 1],  4, $a4beea44);
HH (d, a, b, c, Block[ 4], 11, $4bdecfa9);
HH (c, d, a, b, Block[ 7], 16, $f6bb4b60);
HH (b, c, d, a, Block[10], 23, $bebfbc70);
HH (a, b, c, d, Block[13],  4, $289b7ec6);
HH (d, a, b, c, Block[ 0], 11, $eaa127fa);
HH (c, d, a, b, Block[ 3], 16, $d4ef3085);
HH (b, c, d, a, Block[ 6], 23,  $4881d05);
HH (a, b, c, d, Block[ 9],  4, $d9d4d039);
HH (d, a, b, c, Block[12], 11, $e6db99e5);
HH (c, d, a, b, Block[15], 16, $1fa27cf8);
HH (b, c, d, a, Block[ 2], 23, $c4ac5665);
II (a, b, c, d, Block[ 0],  6, $f4292244);
II (d, a, b, c, Block[ 7], 10, $432aff97);
II (c, d, a, b, Block[14], 15, $ab9423a7);
II (b, c, d, a, Block[ 5], 21, $fc93a039);
II (a, b, c, d, Block[12],  6, $655b59c3);
II (d, a, b, c, Block[ 3], 10, $8f0ccc92);
II (c, d, a, b, Block[10], 15, $ffeff47d);
II (b, c, d, a, Block[ 1], 21, $85845dd1);
II (a, b, c, d, Block[ 8],  6, $6fa87e4f);
II (d, a, b, c, Block[15], 10, $fe2ce6e0);
II (c, d, a, b, Block[ 6], 15, $a3014314);
II (b, c, d, a, Block[13], 21, $4e0811a1);
II (a, b, c, d, Block[ 4],  6, $f7537e82);
II (d, a, b, c, Block[11], 10, $bd3af235);
II (c, d, a, b, Block[ 2], 15, $2ad7d2bb);
II (b, c, d, a, Block[ 9], 21, $eb86d391);
inc(State[0], a);
inc(State[1], b);
inc(State[2], c);
inc(State[3], d);
end;
procedure TMD5.Encode(Source, Target: pointer; Count: longword);
var
S: PByte;
T: PDWORD;
I: longword;
begin
S := Source;
T := Target;
for I := 1 to Count div 4 do begin
T^ := S^;
inc(S);
T^ := T^ or (S^ shl 8);
inc(S);
T^ := T^ or (S^ shl 16);
inc(S);
T^ := T^ or (S^ shl 24);
inc(S);
inc(T);
end;
end;
destructor TMD5.Destroy;
begin
inherited;
end;
procedure TMD5.SetSourceFile(const Value: TFileName);
begin
FSourceFile := Value;
end;
end.

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