MD5 簡介與演算法說明
http://delphi.ktop.com.tw/board.php?cid=169&fid=963&tid=23879

MD5String , 計算字串的 MD5 值, Delphi 2009 用

[code delphi]
//Delphi 2009 測試可用
uses
IdHashMessageDigest;
procedure TForm1.Button1Click(Sender: TObject);
var
MyMD5: TIdHashMessageDigest5;
begin
MyMD5 := TIdHashMessageDigest5.Create;
ShowMessage(MyMD5.HashStringAsHex('test')); // 算出 test 字串的 MD5 值
end;
[/code]

------
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子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

編輯記錄

MD5String , 使用 Indy , Delphi 7 版


[code delphi]
uses
IdHashMessageDigest, IdHash;

procedure TForm1.Button1Click(Sender: TObject);
var
md5 : TIdHashMessageDigest5; // uses : IdHashMessageDigest
longWordRec : T4x4LongWordRecord; // uses : IdHash
begin
md5 := TIdHashMessageDigest5.Create;
longWordRec:=md5.HashValue('test');
ShowMessage(md5.AsHex(longWordRec));
end;

[/code]

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

編輯記錄

MD5File, 使用 Indy, Delphi 7 版, 測試正常


[code delphi]
uses
IdHash, IdHashMessageDigest;
function MD5File(sFileName:String):String;
Var
Digest: T4x4LongWordRecord;
S, S1: String;
i: Integer;
md5: TIdHashMessageDigest5;
fs : TFileStream;
begin
SetLength(S, 16);
md5:=TIdHashMessageDigest5.Create;
fs := TFileStream.Create(sFileName, fmOpenRead);
Digest :=md5.HashValue(fs);
Move(Digest, S[1], 16);
for i := 1 to Length(S) do begin
S1 := S1 Format('x', [Byte(S[i])]);
end;
while Pos(' ', S1) > 0 do S1[Pos(' ', S1)] := '0';
Result:=S1;
md5.Free;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
ShowMessage(MD5File('C:\NTDETECT.COM'));
end;
[/code]

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

編輯記錄

MD5File , 使用 Indy, Delphi 2009 版, 測試正常


[code delphi]
// Delphi 2009 Test OK
uses
IdHashMessageDigest;
function MD5File(sFileName:String):String;
var
md5: TIdHashMessageDigest5;
fs : TFileStream;
begin
md5:=TIdHashMessageDigest5.Create;
fs := TFileStream.Create(sFileName, fmOpenRead);
result :=md5.HashStreamAsHex(fs);
md5.Free;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
ShowMessage(MD5File('C:\NTDETECT.COM'));
end;
[/code]

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

MD5, 不使用 Indy , Delphi 7 測試正常


[code delphi]
{*
FileName : Unit1.pas
Delphi 7

1、MD5String、MD5File、MD5Print、MD5Match這四個函數是供調用的。其他是用來輔助這幾個函數的子函數。
2、MD5String為加密字符串。
3、MD5File為加密這個文件。
4、MD5Print是將加密後的密文轉換成字符串。
5、MD5Match是用來比較密文是否一致。

加密字符串aaa MD5String('aaa')
將加密後的aaa顯示出來 MD5Print(MD5String('aaa'))
比較兩次密文是否一致： MD5Match(MD5String('第一次明文'),MD5String('第二次輸入的明文'))
*}

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type

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;

TForm1 = class(TForm)
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
Edit3: TEdit;
Edit4: TEdit;
Button2: TButton;
OpenDialog1: TOpenDialog;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

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
);

implementation

{$R *.dfm}

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;

// -----------------------------------------------------------------------------------------------

// Encode Count bytes at Source into (Count / 4) DWORDs at Target
procedure 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;

// Decode Count DWORDs at Source into (Count * 4) Bytes at Target
procedure 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 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;

// -----------------------------------------------------------------------------------------------

// Initialize given Context
procedure 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;
// Update given Context to include Length bytes of Input
procedure 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;
// Finalize given Context, create Digest and zeroize Context
procedure 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;
// -----------------------------------------------------------------------------------------------
// Create digest of given Message
function MD5String(M: string): MD5Digest;
var
Context: MD5Context;
begin
MD5Init(Context);
MD5Update(Context, pChar(M), length(M));
MD5Final(Context, Result);
end;
// Create digest of file with given Name
function 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;
// Create hex representation of given Digest
function 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;
// -----------------------------------------------------------------------------------------------
// Compare two Digests
function 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;
{***************************************************************************
實際測試 : 請放 Edit1, Edit2, Edit3, Edit4, OpenDialog1, Button1, Button 2
Button1 : 開啟檔案, 檔名顯示於 Edit1, MD5File 值顯示於 Edit2
Button2 : 在 Edit3 輸入字串, Edit4 顯示 MD5String 結果
****************************************************************************}
procedure TForm1.Button1Click(Sender: TObject);
begin
if OpenDialog1.Execute then
begin
Edit1.Text := OpenDialog1.FileName;
end;
Edit2.Text := UpperCase(MD5Print(MD5File(Edit1.Text)));
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Edit4.Text := UpperCase(MD5Print(MD5String(Edit3.Text)));
end;
end.

[/code]

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

  
MD5String, MD5File , 不用 Indy, Delphi 2009 測試正常

Unit1.pas 內容


[code delphi]
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Edit2: TEdit;
Edit3: TEdit;
Edit4: TEdit;
Button2: TButton;
OpenDialog1: TOpenDialog;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
{***************************************************************************
實際測試 : 請放 Edit1, Edit2, Edit3, Edit4, OpenDialog1, Button1, Button 2
Button1 : 開啟檔案, 檔名顯示於 Edit1, MD5File 值顯示於 Edit2
Button2 : 在 Edit3 輸入字串, Edit4 顯示 MD5String 結果
****************************************************************************}
uses
MD5;
procedure TForm1.Button1Click(Sender: TObject);
begin
if OpenDialog1.Execute then
begin
Edit1.Text := OpenDialog1.FileName;
end;
Edit2.Text := UpperCase(MD5Print(MD5File(Edit1.Text)));
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Edit4.Text := UpperCase(MD5Print(MD5String(Edit3.Text)));
end;
end.

[/code]


MD5.pas 內容


[code delphi]
{*
FileName : MD5.pas
Delphi 2009
1、MD5String、MD5File、MD5Print、MD5Match這四個函數是供調用的。其他是用來輔助這幾個函數的子函數。
2、MD5String為加密字符串。
3、MD5File為加密這個文件。
4、MD5Print是將加密後的密文轉換成字符串。
5、MD5Match是用來比較密文是否一致。
加密字符串aaa MD5String('aaa')
將加密後的aaa顯示出來 MD5Print(MD5String('aaa'))
比較兩次密文是否一致： MD5Match(MD5String('第一次明文'),MD5String('第二次輸入的明文'))
*}

unit MD5;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
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;
procedure MD5Init(var Context: MD5Context);
function MD5String(M: AnsiString): MD5Digest;
procedure MD5Update(var Context: MD5Context; Input: PAnsiChar; Length: longword);
procedure MD5Final(var Context: MD5Context; var Digest: MD5Digest);
function MD5File(N:String): MD5Digest;
function MD5Print(D: MD5Digest): AnsiString;
function MD5F(FileName:AnsiString): AnsiString;
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);
implementation

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;
procedure 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;
procedure 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;
procedure 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 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;
procedure MD5Update(var Context: MD5Context; Input: PAnsiChar; 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 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;
function MD5String(M: AnsiString): MD5Digest;
var
Context: MD5Context;
begin
MD5Init(Context);
MD5Update(Context, PAnsiChar(M), length(M));
MD5Final(Context, Result);
end;
function MD5File(N:String): MD5Digest;
var
FileHandle: THandle;
MapHandle: THandle;
ViewPointer: pointer;
Context: MD5Context;
begin
MD5Init(Context);
// FileHandle := CreateFile(PWideChar(N), GENERIC_READ, FILE_SHARE_READ or FILE_SHARE_WRITE,
// nil, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL or FILE_FLAG_SEQUENTIAL_SCAN, 0);
FileHandle := CreateFile(PWideChar(WideString(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;
function MD5Print(D: MD5Digest): AnsiString;
var
I: byte;
const
Digits: array[0..15] of Ansichar =
('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 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 MD5S(Str: AnsiString): AnsiString;
begin
Result := MD5Print(MD5String(Str));
end;
function MD5F(FileName: AnsiString): AnsiString;
begin
Result := MD5Print(MD5File(FileName));
end;
end.

[/code]

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