哪位兄弟有产生16位MD5的加密算法代码？(100分)

哪位兄弟有产生16位MD5的加密算法代码？

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.

这应该是产生32位的吧？兄弟，，，，，，有没有哪位兄弟有16位的？

哪位兄弟可以帮我下啊？？？？？？？？？？非常感谢。。。。。。。

MD5_16 := Copy(MD5_32, 9, 16);

哇，不会吧，，，这样也可以！？我试下。。。。。。。。。。

接受答案了.