unit dmdes;
{ ********************************************************* }
{ * DELPHI、PHP、C#通用DES编码解码单元 * }
{ * 由TurboPower LockBox部分代码改写 * }
{ * 滕州市东鸣软件工作室制作 ZWF 2011-12-27 *
* update by wh 2012-12-13 仅限英文及数字，中文不匹配 for delphi xe2 * }
{ * EncryDes为编码函数，DecryDes为解码函数，keystr为密码，ivstr为偏移量，
一般设置keystr，ivstr相同，内容为八位字节长度的字符串,编码结果为十六进制字串 * }
{ ********************************************************* }
// 附：测试代码如下
// uses dmdes, Soap.EncdDecd;
//
// procedure TForm1.Button1Click(Sender: TObject);
// var
// str1, str2: AnsiString;
// keyAnsiStr, ivAnsiStr: AnsiString;
// begin
// keyAnsiStr := '11111111';
// ivAnsiStr := AnsiChar($12) + AnsiChar($34) + AnsiChar($56) + AnsiChar($78) +
// AnsiChar($90) + AnsiChar($AB) + AnsiChar($CD) + AnsiChar($EF);
// str1 := AnsiString(Edit1.Text);
// str2 := EncryDes(str1, keyAnsiStr, ivAnsiStr);
// Edit2.Text := EncodeString(string(str2));
// end;
interface
uses
Windows, SysUtils, System.Math;
type
PKey64 = ^TKey64;
TKey64 = array [0 .. 7] of Byte;
type
TDESBlock = array [0 .. 7] of Byte;
TDESContext = packed record
TransformedKey: array [0 .. 31] of LongInt;
Encrypt: Boolean;
end;
function EncryDes(const str: AnsiString; const keystr: AnsiString;
const ivstr: AnsiString): AnsiString;
function DecryDes(const str: AnsiString; const keystr: AnsiString;
const ivstr: AnsiString): AnsiString;
function DecryDessec(const str: AnsiString; const keystr: AnsiString;
const ivstr: AnsiString): AnsiString;
implementation
uses System.AnsiStrings;
procedure XorMemPrim(var Mem1; const Mem2; Count: Cardinal); register;
asm
push esi
push edi
mov esi, eax // esi = Mem1
mov edi, edx // edi = Mem2
push ecx // save byte count
shr ecx, 2 // convert to dwords
jz @Continue
cld
@Loop1: // xor dwords at a time
mov eax, [edi]
xor [esi], eax
add esi, 4
add edi, 4
dec ecx
jnz @Loop1
@Continue: // handle remaining bytes (3 or less)
pop ecx
and ecx, 3
jz @Done
@Loop2: // xor remaining bytes
mov al, [edi]
xor [esi], al
inc esi
inc edi
dec ecx
jnz @Loop2
@Done:
pop edi
pop esi
end;
{ -------------------------------------------------------------------------- }
procedure XorMem(var Mem1; const Mem2; Count: Cardinal);
begin
XorMemPrim(Mem1, Mem2, Count);
end;
{ -------------------------------------------------------------------------- }
procedure EncryptDES(const Context: TDESContext; var Block: TDESBlock);
const
SPBox: array [0 .. 7, 0 .. 63] of DWord = (($01010400, $00000000, $00010000,
$01010404, $01010004, $00010404, $00000004, $00010000, $00000400, $01010400,
$01010404, $00000400, $01000404, $01010004, $01000000, $00000004, $00000404,
$01000400, $01000400, $00010400, $00010400, $01010000, $01010000, $01000404,
$00010004, $01000004, $01000004, $00010004, $00000000, $00000404, $00010404,
$01000000, $00010000, $01010404, $00000004, $01010000, $01010400, $01000000,
$01000000, $00000400, $01010004, $00010000, $00010400, $01000004, $00000400,
$00000004, $01000404, $00010404, $01010404, $00010004, $01010000, $01000404,
$01000004, $00000404, $00010404, $01010400, $00000404, $01000400, $01000400,
$00000000, $00010004, $00010400, $00000000, $01010004),
($80108020, $80008000, $00008000, $00108020, $00100000, $00000020,
$80100020, $80008020, $80000020, $80108020, $80108000, $80000000, $80008000,
$00100000, $00000020, $80100020, $00108000, $00100020, $80008020, $00000000,
$80000000, $00008000, $00108020, $80100000, $00100020, $80000020, $00000000,
$00108000, $00008020, $80108000, $80100000, $00008020, $00000000, $00108020,
$80100020, $00100000, $80008020, $80100000, $80108000, $00008000, $80100000,
$80008000, $00000020, $80108020, $00108020, $00000020, $00008000, $80000000,
$00008020, $80108000, $00100000, $80000020, $00100020, $80008020, $80000020,
$00100020, $00108000, $00000000, $80008000, $00008020, $80000000, $80100020,
$80108020, $00108000),
($00000208, $08020200, $00000000, $08020008, $08000200, $00000000,
$00020208, $08000200, $00020008, $08000008, $08000008, $00020000, $08020208,
$00020008, $08020000, $00000208, $08000000, $00000008, $08020200, $00000200,
$00020200, $08020000, $08020008, $00020208, $08000208, $00020200, $00020000,
$08000208, $00000008, $08020208, $00000200, $08000000, $08020200, $08000000,
$00020008, $00000208, $00020000, $08020200, $08000200, $00000000, $00000200,
$00020008, $08020208, $08000200, $08000008, $00000200, $00000000, $08020008,
$08000208, $00020000, $08000000, $08020208, $00000008, $00020208, $00020200,
$08000008, $08020000, $08000208, $00000208, $08020000, $00020208, $00000008,
$08020008, $00020200),
($00802001, $00002081, $00002081, $00000080, $00802080, $00800081,
$00800001, $00002001, $00000000, $00802000, $00802000, $00802081, $00000081,
$00000000, $00800080, $00800001, $00000001, $00002000, $00800000, $00802001,
$00000080, $00800000, $00002001, $00002080, $00800081, $00000001, $00002080,
$00800080, $00002000, $00802080, $00802081, $00000081, $00800080, $00800001,
$00802000, $00802081, $00000081, $00000000, $00000000, $00802000, $00002080,
$00800080, $00800081, $00000001, $00802001, $00002081, $00002081, $00000080,
$00802081, $00000081, $00000001, $00002000, $00800001, $00002001, $00802080,
$00800081, $00002001, $00002080, $00800000, $00802001, $00000080, $00800000,
$00002000, $00802080),
($00000100, $02080100, $02080000, $42000100, $00080000, $00000100,
$40000000, $02080000, $40080100, $00080000, $02000100, $40080100, $42000100,
$42080000, $00080100, $40000000, $02000000, $40080000, $40080000, $00000000,
$40000100, $42080100, $42080100, $02000100, $42080000, $40000100, $00000000,
$42000000, $02080100, $02000000, $42000000, $00080100, $00080000, $42000100,
$00000100, $02000000, $40000000, $02080000, $42000100, $40080100, $02000100,
$40000000, $42080000, $02080100, $40080100, $00000100, $02000000, $42080000,
$42080100, $00080100, $42000000, $42080100, $02080000, $00000000, $40080000,
$42000000, $00080100, $02000100, $40000100, $00080000, $00000000, $40080000,
$02080100, $40000100),
($20000010, $20400000, $00004000, $20404010, $20400000, $00000010,
$20404010, $00400000, $20004000, $00404010, $00400000, $20000010, $00400010,
$20004000, $20000000, $00004010, $00000000, $00400010, $20004010, $00004000,
$00404000, $20004010, $00000010, $20400010, $20400010, $00000000, $00404010,
$20404000, $00004010, $00404000, $20404000, $20000000, $20004000, $00000010,
$20400010, $00404000, $20404010, $00400000, $00004010, $20000010, $00400000,
$20004000, $20000000, $00004010, $20000010, $20404010, $00404000, $20400000,
$00404010, $20404000, $00000000, $20400010, $00000010, $00004000, $20400000,
$00404010, $00004000, $00400010, $20004010, $00000000, $20404000, $20000000,
$00400010, $20004010),
($00200000, $04200002, $04000802, $00000000, $00000800, $04000802,
$00200802, $04200800, $04200802, $00200000, $00000000, $04000002, $00000002,
$04000000, $04200002, $00000802, $04000800, $00200802, $00200002, $04000800,
$04000002, $04200000, $04200800, $00200002, $04200000, $00000800, $00000802,
$04200802, $00200800, $00000002, $04000000, $00200800, $04000000, $00200800,
$00200000, $04000802, $04000802, $04200002, $04200002, $00000002, $00200002,
$04000000, $04000800, $00200000, $04200800, $00000802, $00200802, $04200800,
$00000802, $04000002, $04200802, $04200000, $00200800, $00000000, $00000002,
$04200802, $00000000, $00200802, $04200000, $00000800, $04000002, $04000800,
$00000800, $00200002),
($10001040, $00001000, $00040000, $10041040, $10000000, $10001040,
$00000040, $10000000, $00040040, $10040000, $10041040, $00041000, $10041000,
$00041040, $00001000, $00000040, $10040000, $10000040, $10001000, $00001040,
$00041000, $00040040, $10040040, $10041000, $00001040, $00000000, $00000000,
$10040040, $10000040, $10001000, $00041040, $00040000, $00041040, $00040000,
$10041000, $00001000, $00000040, $10040040, $00001000, $00041040, $10001000,
$00000040, $10000040, $10040000, $10040040, $10000000, $00040000, $10001040,
$00000000, $10041040, $00040040, $10000040, $10040000, $10001000, $10001040,
$00000000, $10041040, $00041000, $00041000, $00001040, $00001040, $00040040,
$10000000, $10041000));
var
I, L, R, Work: DWord;
CPtr: PDWord;
procedure SplitBlock(const Block: TDESBlock; var L, R: DWord); register;
asm
push ebx
push eax
mov eax, [eax]
mov bh, al
mov bl, ah
rol ebx, 16
shr eax, 16
mov bh, al
mov bl, ah
mov [edx], ebx
pop eax
mov eax, [eax+4]
mov bh, al
mov bl, ah
rol ebx, 16
shr eax, 16
mov bh, al
mov bl, ah
mov [ecx], ebx
pop ebx
end;
procedure JoinBlock(const L, R: LongInt; var Block: TDESBlock); register;
asm
push ebx
mov bh, al
mov bl, ah
rol ebx, 16
shr eax, 16
mov bh, al
mov bl, ah
mov [ecx+4], ebx
mov bh, dl
mov bl, dh
rol ebx, 16
shr edx, 16
mov bh, dl
mov bl, dh
mov [ecx], ebx
pop ebx
end;
procedure IPerm(var L, R: DWord);
var
Work: DWord;
begin
Work := ((L shr 4) xor R) and $0F0F0F0F;
R := R xor Work;
L := L xor Work shl 4;
Work := ((L shr 16) xor R) and $0000FFFF;
R := R xor Work;
L := L xor Work shl 16;
Work := ((R shr 2) xor L) and $33333333;
L := L xor Work;
R := R xor Work shl 2;
Work := ((R shr 8) xor L) and $00FF00FF;
L := L xor Work;
R := R xor Work shl 8;
R := (R shl 1) or (R shr 31);
Work := (L xor R) and $AAAAAAAA;
L := L xor Work;
R := R xor Work;
L := (L shl 1) or (L shr 31);
end;
procedure FPerm(var L, R: DWord);
var
Work: DWord;
begin
L := L;
R := (R shl 31) or (R shr 1);
Work := (L xor R) and $AAAAAAAA;
L := L xor Work;
R := R xor Work;
L := (L shr 1) or (L shl 31);
Work := ((L shr 8) xor R) and $00FF00FF;
R := R xor Work;
L := L xor Work shl 8;
Work := ((L shr 2) xor R) and $33333333;
R := R xor Work;
L := L xor Work shl 2;
Work := ((R shr 16) xor L) and $0000FFFF;
L := L xor Work;
R := R xor Work shl 16;
Work := ((R shr 4) xor L) and $0F0F0F0F;
L := L xor Work;
R := R xor Work shl 4;
end;
begin
SplitBlock(Block, L, R);
IPerm(L, R);
CPtr := @Context;
for I := 0 to 7 do
begin
Work := (((R shr 4) or (R shl 28)) xor CPtr^);
inc(CPtr);
L := L xor SPBox[6, Work and $3F];
L := L xor SPBox[4, Work shr 8 and $3F];
L := L xor SPBox[2, Work shr 16 and $3F];
L := L xor SPBox[0, Work shr 24 and $3F];
Work := (R xor CPtr^);
inc(CPtr);
L := L xor SPBox[7, Work and $3F];
L := L xor SPBox[5, Work shr 8 and $3F];
L := L xor SPBox[3, Work shr 16 and $3F];
L := L xor SPBox[1, Work shr 24 and $3F];
Work := (((L shr 4) or (L shl 28)) xor CPtr^);
inc(CPtr);
R := R xor SPBox[6, Work and $3F];
R := R xor SPBox[4, Work shr 8 and $3F];
R := R xor SPBox[2, Work shr 16 and $3F];
R := R xor SPBox[0, Work shr 24 and $3F];
Work := (L xor CPtr^);
inc(CPtr);
R := R xor SPBox[7, Work and $3F];
R := R xor SPBox[5, Work shr 8 and $3F];
R := R xor SPBox[3, Work shr 16 and $3F];
R := R xor SPBox[1, Work shr 24 and $3F];
end;
FPerm(L, R);
JoinBlock(L, R, Block);
end;
procedure InitEncryptDES(const Key: TKey64; var Context: TDESContext;
Encrypt: Boolean);
const
PC1: array [0 .. 55] of Byte = (56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33,
25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 62, 54, 46, 38,
30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 60, 52, 44, 36, 28, 20, 12, 4,
27, 19, 11, 3);
PC2: array [0 .. 47] of Byte = (13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, 22,
18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, 40, 51, 30, 36, 46, 54, 29, 39, 50,
44, 32, 47, 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31);
CTotRot: array [0 .. 15] of Byte = (1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21,
23, 25, 27, 28);
CBitMask: array [0 .. 7] of Byte = (128, 64, 32, 16, 8, 4, 2, 1);
var
PC1M: array [0 .. 55] of Byte;
PC1R: array [0 .. 55] of Byte;
KS: array [0 .. 7] of Byte;
I, J, L, M: LongInt;
begin
{ convert PC1 to bits of key }
for J := 0 to 55 do
begin
L := PC1[J];
M := L mod 8;
PC1M[J] := Ord((Key[L div 8] and CBitMask[M]) <> 0);
end;
{ key chunk for each iteration }
for I := 0 to 15 do
begin
{ rotate PC1 the right amount }
for J := 0 to 27 do
begin
L := J + CTotRot[I];
if (L < 28) then
begin
PC1R[J] := PC1M[L];
PC1R[J + 28] := PC1M[L + 28];
end
else
begin
PC1R[J] := PC1M[L - 28];
PC1R[J + 28] := PC1M[L];
end;
end;
{ select bits individually }
FillChar(KS, SizeOf(KS), 0);
for J := 0 to 47 do
if Boolean(PC1R[PC2[J]]) then
begin
L := J div 6;
KS[L] := KS[L] or CBitMask[J mod 6] shr 2;
end;
{ now convert to odd/even interleaved form for use in F }
if Encrypt then
begin
Context.TransformedKey[I * 2] := (LongInt(KS[0]) shl 24) or
(LongInt(KS[2]) shl 16) or (LongInt(KS[4]) shl 8) or (LongInt(KS[6]));
Context.TransformedKey[I * 2 + 1] := (LongInt(KS[1]) shl 24) or
(LongInt(KS[3]) shl 16) or (LongInt(KS[5]) shl 8) or (LongInt(KS[7]));
end
else
begin
Context.TransformedKey[31 - (I * 2 + 1)] := (LongInt(KS[0]) shl 24) or
(LongInt(KS[2]) shl 16) or (LongInt(KS[4]) shl 8) or (LongInt(KS[6]));
Context.TransformedKey[31 - (I * 2)] := (LongInt(KS[1]) shl 24) or
(LongInt(KS[3]) shl 16) or (LongInt(KS[5]) shl 8) or (LongInt(KS[7]));
end;
end;
Context.Encrypt := Encrypt;
end;
procedure EncryptDESCBC(const Context: TDESContext; const Prev: TDESBlock;
var Block: TDESBlock);
begin
if Context.Encrypt then
begin
XorMem(Block, Prev, SizeOf(Block));
EncryptDES(Context, Block);
end
else
begin
EncryptDES(Context, Block);
XorMem(Block, Prev, SizeOf(Block));
end;
end;
function EncryDes(const str: AnsiString; const keystr: AnsiString;
const ivstr: AnsiString): AnsiString;
var
Key: TKey64;
Context: TDESContext;
Block, iv: TDESBlock;
I, J, len, posnum: smallint;
poschar, xx: AnsiChar;
begin
for I := 0 to 7 do
begin
if I > (length(keystr) - 1) then
Key[I] := 0
else
Key[I] := Byte(keystr[I + 1]);
end;
for I := 0 to 7 do
begin
if I > (length(ivstr) - 1) then
iv[I] := 0
else
iv[I] := Byte(ivstr[I + 1]);
end;
InitEncryptDES(Key, Context, true);
len := length(AnsiString(str));
xx := AnsiChar(8 - (len mod 8));
{ DELPHI下要实现相应的加密和解密，需要自己写DES代码，并加上CBC方式的异或
这里要说明一点，我发现C#下DES明文在加密前，有补足8的倍数的情况，即如果
如果是“11111”就会补成“11111＃3＃3＃3”，如果是“11111111”就会“11111111＃8＃8＃8＃8＃8＃8＃8＃8”，
然后在进行异或，最后加密！ }
for I := 0 to (len div 8) do
begin
for J := 0 to 7 do
begin
if ((I * 8 + J + 1) <= len) then // <=
begin
poschar := str[I * 8 + J + 1];
Block[J] := Byte(poschar);
end
else
Block[J] := Byte(xx);
end;
EncryptDESCBC(Context, iv, Block);
for J := 0 to 7 do
begin
posnum := Block[J];
result := result + AnsiChar(posnum); // inttohex(posnum,2);
end;
iv := Block;
end;
end;
function DecryDessec(const str: AnsiString; const keystr: AnsiString;
const ivstr: AnsiString): AnsiString;
var
Key: TKey64;
Context: TDESContext;
bak, Block, iv: TDESBlock;
I, J, { len, } posnum: smallint;
{ poschar,xx:char; }
res, { lss, } temp: AnsiString;
begin
temp := keystr;
res := '';
for I := 0 to 7 do
begin
if I > (length(temp) - 1) then
Key[I] := 0
else
Key[I] := Byte(temp[I + 1]);
end;
temp := ivstr;
for I := 0 to 7 do
begin
if I > (length(temp) - 1) then
iv[I] := 0
else
iv[I] := Byte(temp[I + 1]);
end;
InitEncryptDES(Key, Context, False);
temp := str;
posnum := 0;
for I := 0 to length(temp) - 1 do
begin
Block[posnum] := Byte(temp[I + 1]);
posnum := posnum + 1;
if posnum = 8 then
begin
bak := Block;
EncryptDESCBC(Context, iv, Block);
for J := 0 to 7 do
begin
// temp := temp+inttostr(byte(block[i]))+' ';
res := res + AnsiChar(Block[J]);
end;
iv := bak;
posnum := 0;
end;
end;
if posnum <> 0 then
begin
//
end
else
begin
temp := '';
for I := 1 to length(res) do
begin
temp := temp + AnsiChar(res[I]);
end;
result := Trim(temp);
end;
end;
function DecryDes(const str: AnsiString; const keystr: AnsiString;
const ivstr: AnsiString): AnsiString;
var
Key: TKey64;
Context: TDESContext;
bak, Block, iv: TDESBlock;
I, J, len { ,posnum } : smallint;
poschar, xx: AnsiChar;
res, lss: AnsiString;
begin
for I := 0 to 7 do
begin
if I > (length(keystr) - 1) then
Key[I] := 0
else
Key[I] := Byte(keystr[I + 1]);
end;
for I := 0 to 15 do
begin
if I > (length(ivstr) - 1) then
iv[I] := 0
else
iv[I] := Byte(ivstr[I + 1]);
end;
InitEncryptDES(Key, Context, False);
res := '';
for J := 0 to (length(str) div 2) - 1 do
begin
lss := copy(str, J * 2 + 1, 2);
res := res + AnsiChar(StrToInt('$' + lss));
end;
len := length(AnsiString(res));
for I := 0 to round(len / 8) - 1 do
begin
for J := 0 to 7 do
begin
if ((I * 7 + J + 1) <= len) then
begin
poschar := res[I * 8 + J + 1];
Block[J] := Byte(poschar);
end
else
begin
Block[J] := Byte(xx);
end;
end;
bak := Block;
EncryptDESCBC(Context, iv, Block);
for J := 0 to 7 do
begin
result := result + AnsiChar(Block[J]);
end;
iv := bak;
end;
end;
end.
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THE END
