402 lines
13 KiB
ObjectPascal
402 lines
13 KiB
ObjectPascal
|
// tabs = 2
|
|||
|
|
// -----------------------------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
// 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 <20> 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 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[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;
|
|||
|
|
|
|||
|
|
end.
|
|||
|
|
|