谁给份MD5的Delphi源码，最好写上使用方法。谢谢。 (50分)

本来新手。分不多。给50。
给下载链接或发到zdexin.net@tom.com均可。
收到给分。~~

// tabs = 2
// -----------------------------------------------------------------------------------------------
//
// MD5 Message-Digest for Delphi 4
//
// Delphi Unit implementing the
// RSA Data Security, Inc. MD5 Message-Digest Algorithm
//
// Implementation of Ronald L. Rivest's RFC 1321
//
// Copyright ?1997-1999 Medienagentur Fichtner &amp
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 md5;

// -----------------------------------------------------------------------------------------------
INTERFACE
// -----------------------------------------------------------------------------------------------

uses
Windows;

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);
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;

function MD5Match(D1, D2: MD5Digest): boolean;

// -----------------------------------------------------------------------------------------------
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
);

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, Context.State);
inc(I, 64);
end;
Index := 0;
end else I := 0;
CopyMemory(@Context.Buffer[Index], @Input, 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 shr 4) and $0f] + Digits[D 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 = D2;
inc(I);
end;
end;

end.

使用：
// tabs = 2
// -----------------------------------------------------------------------------------------------
//
// MD5 Message-Digest for Delphi 4 - Test Driver
//
// Copyright ?1997-1999 Medienagentur Fichtner &amp
Meyer
// Written by Matthias Fichtner
//
// -----------------------------------------------------------------------------------------------
//
// Please see md5_test.dpr for detailed information.
//
// -----------------------------------------------------------------------------------------------
// 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 md5_test_main;

// -----------------------------------------------------------------------------------------------
INTERFACE
// -----------------------------------------------------------------------------------------------

uses
Windows, SysUtils, Classes, Forms, Dialogs, Controls, StdCtrls, ComCtrls;

type
TMain = class(TForm)
Pages: TPageControl;
TabString: TTabSheet;
TabFile: TTabSheet;
TabTestSuite: TTabSheet;
TabTimeTrial: TTabSheet;
SLabel: TLabel;
SEdit: TEdit;
SDigest: TButton;
FLabel: TLabel;
FEdit: TEdit;
FSelect: TButton;
FDigest: TButton;
TSExecute: TButton;
TTLabel1: TLabel;
TTLength: TEdit;
TTLabel2: TLabel;
TTCount: TEdit;
TTStart: TButton;
Display: TMemo;
ButtonClear: TButton;
ButtonClose: TButton;
OpenDlg: TOpenDialog;
procedure SDigestClick(Sender: TObject);
procedure FSelectClick(Sender: TObject);
procedure FDigestClick(Sender: TObject);
procedure TSExecuteClick(Sender: TObject);
procedure TTKeyPress(Sender: TObject
var Key: Char);
procedure TTStartClick(Sender: TObject);
procedure ButtonClearClick(Sender: TObject);
procedure ButtonCloseClick(Sender: TObject);
end;

var
Main: TMain;

// -----------------------------------------------------------------------------------------------
IMPLEMENTATION
// -----------------------------------------------------------------------------------------------

{$R *.DFM}

uses
md5;

function LogEntry(Cmd, Msg: string
Dig: MD5Digest): string;
begin
Result := Format('%s(''%s'') =' + #13#10 + ' %s', [Cmd, Msg, MD5Print(Dig)]);
end;

procedure TMain.SDigestClick(Sender: TObject);
begin
with Display.Lines do begin
if Count > 0 then Add('');
Add(LogEntry('MD5String', SEdit.Text, MD5String(SEdit.Text)));
end;
end;

procedure TMain.FSelectClick(Sender: TObject);
begin
with OpenDlg do if Execute then FEdit.Text := FileName;
end;

procedure TMain.FDigestClick(Sender: TObject);
begin
Screen.Cursor := crHourGlass;
with Display.Lines do begin
if Count > 0 then Add('');
Add(LogEntry('MD5File', FEdit.Text, MD5File(FEdit.Text)));
end;
Screen.Cursor := crDefault;
end;

procedure TMain.TSExecuteClick(Sender: TObject);
var
I: byte;
const
Suite: array[1..7] of string = (
'', 'a', 'abc', 'message digest', 'abcdefghijklmnopqrstuvwxyz',
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
'12345678901234567890123456789012345678901234567890123456789012345678901234567890'
);
begin
with Display.Lines do begin
if Count > 0 then Add('');
Add('Executing RFC 1321 test suite ...');
for I := 1 to 7 do Add(LogEntry(' MD5', Suite, MD5String(Suite)));
end;
end;

procedure TMain.TTKeyPress(Sender: TObject
var Key: Char);
begin
if not (Key in [#8, '0'..'9']) then Key := #0;
end;

procedure TMain.TTStartClick(Sender: TObject);
var
BLength, BCount: longint;
Block: pointer;
B: pByte;
I: longint;
Ticks: longword;
Context: MD5Context;
Digest: MD5Digest;
Speed: string;
begin
Screen.Cursor := crHourGlass;
BLength := strToIntDef(copy(TTLength.Text, 1, 5), 0);
BCount := strToIntDef(copy(TTCount.Text, 1, 5), 0);
if BLength < 0 then BLength := 0;
if BCount < 0 then BCount := 0;
with Display.Lines do begin
if Count > 0 then Add('');
Add(Format('Digesting %0.0n %0.0n-byte blocks ...', [BCount + 0.1, BLength + 0.1]));
GetMem(Block, BLength + 1);
try
B := Block;
I := 0;
while I < BLength do begin
B^ := I and $ff;
inc(B);
inc(I);
end;
Ticks := GetTickCount;
MD5Init(Context);
I := 0;
while I < BCount do begin
MD5Update(Context, Block, BLength);
inc(I);
end;
MD5Final(Context, Digest);
Ticks := GetTickCount - Ticks;
if (BCount * BLength = 0) or (Ticks = 0) then Speed := 'n/a'
else Speed := Format('%.0n bytes/second', [(BCount * BLength) / (Ticks / 1000)]);
Add(Format(' Digest = %s', [MD5Print(Digest)]));
Add(Format(' Time = %.3n seconds', [Ticks / 1000]));
Add(Format(' Speed = %s', [Speed]));
finally
FreeMem(Block);
end;
end;
Screen.Cursor := crDefault;
end;

procedure TMain.ButtonClearClick(Sender: TObject);
begin
Display.Lines.Clear;
end;

procedure TMain.ButtonCloseClick(Sender: TObject);
begin
Close;
end;

end.

下载： http://ale.xicp.net/upload/MD5.rar

这个Sampel在delphi7下面运行的时候报错
integer overflow

到作者网站去看看有没有新的版本：http://www.fichtner.net/delphi/md5/
不过，既然源代码都在这里了，错误应该可以找出来的吧。不然怎么写程序？

unit Md5;

interface

uses
Windows;

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);
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;
function MD5Match(D1, D2: MD5Digest): Boolean;

function RivestStr(Str: string): string
//MD5 string
function RivestFile(FileName: string): string
//MD5 file

implementation

uses
SysUtils;

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);

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, Context.State);
inc(I, 64);
end;
Index := 0;
end
else I := 0;
CopyMemory(@Context.Buffer[Index], @Input, 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 shr 4) and $0f] + Digits[D 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 = D2;
Inc(I);
end;
end;

function RivestStr(Str: string): string;
begin
Result := UpperCase(MD5Print(MD5String(Str)));
end;

function RivestFile(FileName: string): string;
begin
Result := MD5Print(MD5File(FileName));
end;

end.

感谢！！

谢谢各位帮忙。：）