根据网上一个流传很久的基于Delph4的MD5单元修改的, 可以支持4G以上的文件, 可以支持UNICODE字符的Delphi
恩.......对于大文件速度稍微慢了一点点, 在我自己的电脑上测试, 5.2G文件计算速度86秒...凑合了吧
如果谁能优化一下速度, 请联系我哦~~~
(*
----------------------------------------------------------------------------------------------- MD5 Message-Digest 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 & Meyer
Written by Matthias Fichtner -----------------------------------------------------------------------------------------------
2013-11-11 堕落恶魔
增加对超过4G大小文件支持
增加对Delphi2009以及更高版本Delphi支持 如果有修改, 希望能够将代码同步邮件给我, 谢谢
hs_kill_god@hotmail.com
----------------------------------------------------------------------------------------------- *) Unit MD5; // -----------------------------------------------------------------------------------------------
interface
// ----------------------------------------------------------------------------------------------- uses
Windows, Classes, SysUtils; const
MD5Length: Byte = ; type
MD5Count = array[..] of Int64;
MD5State = array[..] of DWORD;
MD5Block = array[..] of DWORD;
MD5CBits = array[..] of byte;
MD5Digest = array[..] of byte;
MD5Buffer = array[..] of byte; function MD5String(M: AnsiString): MD5Digest;
function MD5File(N: AnsiString): MD5Digest;
function MD5Print(D: MD5Digest): AnsiString; function MD5Match(D1, D2: MD5Digest): boolean; // -----------------------------------------------------------------------------------------------
IMPLEMENTATION
// ----------------------------------------------------------------------------------------------- var
PADDING: MD5Buffer = (
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $,
$, $, $, $, $, $, $, $
); type
MD5Context = record
State: MD5State;
Count: MD5Count;
Buffer: MD5Buffer;
end; function F(x, y, z: DWORD): DWORD; inline;
begin
Result := (x and y) or ((not x) and z);
end; function G(x, y, z: DWORD): DWORD; inline;
begin
Result := (x and z) or (y and (not z));
end; function H(x, y, z: DWORD): DWORD; inline;
begin
Result := x xor y xor z;
end; function I(x, y, z: DWORD): DWORD; inline;
begin
Result := y xor (x or (not z));
end; procedure rot(var x: DWORD; n: BYTE); inline;
begin
x := (x shl n) or (x shr ( - n));
end; procedure FF(var a: DWORD; b, c, d, x: DWORD; s: BYTE; ac: DWORD); inline;
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); inline;
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); inline;
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); inline;
begin
inc(a, I(b, c, d) + x + ac);
rot(a, s);
inc(a, b);
end; // ----------------------------------------------------------------------------------------------- // Encode Count bytes at Source into (Count / ) DWORDs at Target
procedure Encode(Source, Target: pointer; Count: longword);
var
S: PByte;
T: PDWORD;
I: longword;
begin
S := Source;
T := Target;
for I := to Count div do
begin
T^ := S^;
inc(S);
T^ := T^ or (S^ shl );
inc(S);
T^ := T^ or (S^ shl );
inc(S);
T^ := T^ or (S^ shl );
inc(S);
inc(T);
end;
end; // Decode Count DWORDs at Source into (Count * ) Bytes at Target
procedure Decode(Source, Target: pointer; Count: longword);
var
S: PDWORD;
T: PByte;
I: longword;
begin
S := Source;
T := Target;
for I := to Count do
begin
T^ := S^ and $FF;
inc(T);
T^ := (S^ shr ) and $FF;
inc(T);
T^ := (S^ shr ) and $FF;
inc(T);
T^ := (S^ shr ) and $FF;
inc(T);
inc(S);
end;
end; function MP(P: Pointer; M: Integer): Pointer;
begin
Result := Pointer(Integer(P) + M);
end; // Transform State according to first bytes at Buffer
procedure Transform(Buffer: pointer; var State: MD5State);
var
a, b, c, d: DWORD;
Block: MD5Block;
begin
Encode(Buffer, @Block, );
a := State[];
b := State[];
c := State[];
d := State[];
FF (a, b, c, d, Block[ ], , $d76aa478);
FF (d, a, b, c, Block[ ], , $e8c7b756);
FF (c, d, a, b, Block[ ], , $242070db);
FF (b, c, d, a, Block[ ], , $c1bdceee);
FF (a, b, c, d, Block[ ], , $f57c0faf);
FF (d, a, b, c, Block[ ], , $4787c62a);
FF (c, d, a, b, Block[ ], , $a8304613);
FF (b, c, d, a, Block[ ], , $fd469501);
FF (a, b, c, d, Block[ ], , $698098d8);
FF (d, a, b, c, Block[ ], , $8b44f7af);
FF (c, d, a, b, Block[], , $ffff5bb1);
FF (b, c, d, a, Block[], , $895cd7be);
FF (a, b, c, d, Block[], , $6b901122);
FF (d, a, b, c, Block[], , $fd987193);
FF (c, d, a, b, Block[], , $a679438e);
FF (b, c, d, a, Block[], , $49b40821);
GG (a, b, c, d, Block[ ], , $f61e2562);
GG (d, a, b, c, Block[ ], , $c040b340);
GG (c, d, a, b, Block[], , $265e5a51);
GG (b, c, d, a, Block[ ], , $e9b6c7aa);
GG (a, b, c, d, Block[ ], , $d62f105d);
GG (d, a, b, c, Block[], , $);
GG (c, d, a, b, Block[], , $d8a1e681);
GG (b, c, d, a, Block[ ], , $e7d3fbc8);
GG (a, b, c, d, Block[ ], , $21e1cde6);
GG (d, a, b, c, Block[], , $c33707d6);
GG (c, d, a, b, Block[ ], , $f4d50d87);
GG (b, c, d, a, Block[ ], , $455a14ed);
GG (a, b, c, d, Block[], , $a9e3e905);
GG (d, a, b, c, Block[ ], , $fcefa3f8);
GG (c, d, a, b, Block[ ], , $676f02d9);
GG (b, c, d, a, Block[], , $8d2a4c8a);
HH (a, b, c, d, Block[ ], , $fffa3942);
HH (d, a, b, c, Block[ ], , $8771f681);
HH (c, d, a, b, Block[], , $6d9d6122);
HH (b, c, d, a, Block[], , $fde5380c);
HH (a, b, c, d, Block[ ], , $a4beea44);
HH (d, a, b, c, Block[ ], , $4bdecfa9);
HH (c, d, a, b, Block[ ], , $f6bb4b60);
HH (b, c, d, a, Block[], , $bebfbc70);
HH (a, b, c, d, Block[], , $289b7ec6);
HH (d, a, b, c, Block[ ], , $eaa127fa);
HH (c, d, a, b, Block[ ], , $d4ef3085);
HH (b, c, d, a, Block[ ], , $4881d05);
HH (a, b, c, d, Block[ ], , $d9d4d039);
HH (d, a, b, c, Block[], , $e6db99e5);
HH (c, d, a, b, Block[], , $1fa27cf8);
HH (b, c, d, a, Block[ ], , $c4ac5665);
II (a, b, c, d, Block[ ], , $f4292244);
II (d, a, b, c, Block[ ], , $432aff97);
II (c, d, a, b, Block[], , $ab9423a7);
II (b, c, d, a, Block[ ], , $fc93a039);
II (a, b, c, d, Block[], , $655b59c3);
II (d, a, b, c, Block[ ], , $8f0ccc92);
II (c, d, a, b, Block[], , $ffeff47d);
II (b, c, d, a, Block[ ], , $85845dd1);
II (a, b, c, d, Block[ ], , $6fa87e4f);
II (d, a, b, c, Block[], , $fe2ce6e0);
II (c, d, a, b, Block[ ], , $a3014314);
II (b, c, d, a, Block[], , $4e0811a1);
II (a, b, c, d, Block[ ], , $f7537e82);
II (d, a, b, c, Block[], , $bd3af235);
II (c, d, a, b, Block[ ], , $2ad7d2bb);
II (b, c, d, a, Block[ ], , $eb86d391);
inc(State[], a);
inc(State[], b);
inc(State[], c);
inc(State[], d);
end; // ----------------------------------------------------------------------------------------------- // Initialize given Context
procedure MD5Init(var AContext: MD5Context);
begin
with AContext do
begin
State[] := $;
State[] := $EFCDAB89;
State[] := $98BADCFE;
State[] := $;
Count[] := ;
Count[] := ;
FillChar(Buffer, SizeOf(MD5Buffer), );
end;
end; // Update given Context to include Length bytes of Input
procedure MD5Update(var AContext: MD5Context; AInput: Pointer; ALength: Int64); overload;
var
nIndex: Int64;
nPartLen: Int64;
I: Int64;
begin
with AContext do
begin
nIndex := (Count[] shr ) and $3F;
inc(Count[], ALength shl );
if Count[] < (ALength shl ) then
inc(Count[]);
inc(Count[], ALength shr );
end;
nPartLen := - nIndex;
if ALength >= nPartLen then
begin
Move(AInput^, AContext.Buffer[nIndex], nPartLen);
Transform(@AContext.Buffer, AContext.State);
I := nPartLen;
while I + < ALength do
begin
Transform(MP(AInput, I), AContext.State);
inc(I, );
end;
nIndex := ;
end
else
I := ;
Move(MP(AInput, I)^, AContext.Buffer[nIndex], ALength - i);
end; procedure MD5Update(var AContext: MD5Context; AInput: TStream; ALength: Int64); overload;
var
nIndex: Int64;
nPartLen: Int64;
i: Int64;
x, m: Integer;
nBuff: array[..] of Byte;
begin
with AContext do
begin
nIndex := (Count[] shr ) and $3F;
inc(Count[], ALength shl );
if Count[] < (ALength shl ) then
inc(Count[]);
inc(Count[], ALength shr );
end;
nPartLen := - nIndex;
if ALength >= nPartLen then
begin
AInput.Read(AContext.Buffer[nIndex], nPartLen);
Transform(@AContext.Buffer, AContext.State);
i := nPartLen;
while i < ALength - do
begin
AInput.Read(nBuff, );
for x := to do
Transform(@(nBuff[x * ]), AContext.State);
Inc(i, );
end;
m := (ALength - i) div ;
x := m * ;
AInput.Read(nBuff, x);
Inc(I, x);
for x := to m - do
Transform(@(nBuff[x * ]), AContext.State);
nIndex := ;
end
else
i := ;
AInput.Read(AContext.Buffer[nIndex], ALength - i);
end; // Finalize given Context, create Digest and zeroize Context
procedure MD5Final(var AContext: MD5Context; var Digest: MD5Digest);
var
nBits: MD5CBits;
nIndex: longword;
nPadLen: longword;
begin
Decode(@AContext.Count, @nBits, );
nIndex := (AContext.Count[] shr ) and $3f;
if nIndex < then
nPadLen := - nIndex
else
nPadLen := - nIndex;
MD5Update(AContext, @PADDING, nPadLen);
MD5Update(AContext, @nBits, );
Decode(@AContext.State, @Digest, );
FillChar(AContext, SizeOf(MD5Context), );
end; // ----------------------------------------------------------------------------------------------- // Create digest of given Message
function MD5String(M: AnsiString): MD5Digest;
var
nContext: MD5Context;
begin
MD5Init(nContext);
MD5Update(nContext, pAnsiChar(M), length(M));
MD5Final(nContext, Result);
end; // Create digest of file with given Name
function MD5File(N: AnsiString): MD5Digest;
var
nContext: MD5Context;
nFS: TFileStream;
begin
MD5Init(nContext);
if FileExists(N) then
begin
nFS := TFileStream.Create(N, fmOpenRead or fmShareDenyWrite);
try
nFS.Position := ;
MD5Update(nContext, nFS, nFS.Size);
finally
nFS.Free;
end;
end;
MD5Final(nContext, Result);
end; // Create hex representation of given Digest
function MD5Print(D: MD5Digest): AnsiString;
var
I, x: byte;
const
Digits: array[..] of AnsiChar =
('', '', '', '', '', '', '', '', '', '', 'a', 'b', 'c', 'd', 'e', 'f');
begin
SetLength(Result, );
for I := to do
begin
x := i * + ;
Result[x] := Digits[(D[I] shr ) and $0f];
Result[x + ] := Digits[D[I] and $0f];
end;
end; // ----------------------------------------------------------------------------------------------- // Compare two Digests
function MD5Match(D1, D2: MD5Digest): boolean;
var
I: byte;
begin
I := ;
Result := TRUE;
while Result and (I < ) do
begin
Result := D1[I] = D2[I];
inc(I);
end;
end; end.