寻求一些经典的加密算法单元。。。>>>>>>>>>>>>>>>

有没有一些标准加密算法的单元呢？
比如ras...........

function TForm1.Encrypkey(src:string;key:string):string;
var idx,keylen,keypos,offset:integer;
    dest:string;srcpos:integer;srcasc:integer;Tmpsrcasc:integer;
    Range:integer;
begin
keylen:=length(key);
if  keylen=0 then key:='Think space';
keypos:=0;
srcpos:=0;
srcasc:=0;
Range:=256;
randomize;
offset:=random(Range);
dest:=format('%1.2x',[offset]);
for srcpos:=1 to length(src) do
    begin
    srcasc:=(ord(src[srcpos])+offset) mod 255;
    if keypos<keylen then keypos:=keypos+1 else keypos:=1;
    srcasc:=srcasc xor ord(key[keypos]);
    dest:=dest+format('%1.2x',[srcasc]);
    offset:=srcasc;
    end;
result:=dest;
end;function TForm1.Uncrypkey(src:string;key:string):string;
var idx,keylen,keypos,offset:integer;dest:string;srcpos:integer;
    srcasc,tmpsrcasc,range:integer;
begin
keylen:=length(key);
if  keylen=0 then key:='Think space';
keypos:=0;
srcpos:=0;
srcasc:=0;
range:=256;
offset:=strtoint('$'+copy(src,1,2));
srcpos:=3;
repeat
srcasc:=strtoint('$'+copy(src,srcpos,2));
if keypos<keylen then keypos:=keypos+1 else keypos:=1;
tmpsrcasc:=srcasc xor ord(key[keypos]);
if tmpsrcasc<=offset then
   tmpsrcasc:=255+tmpsrcasc-offset
else
   tmpsrcasc:=tmpsrcasc-offset;
dest:=dest+chr(tmpsrcasc);
offset:=srcasc;
srcpos:=srcpos+2;
until srcpos>=length(src);
result:=dest;
end;

深度历险www.vclxxx.com上有大把加密组件

你可以试试TurboPower LockBox和Cipher,这两套控件都不错的，其中前者提供了RSA和DSA，但没有Ideal,后者没有非对称加密部分，但提供了更多地对称加密算法。

加密算法很多网站上都有介绍的！
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unit DesUnit;interfaceprocedure DES(var Input; var Output; var Key; Encrypt : Boolean);implementationprocedure DES(var Input; var Output; var Key; Encrypt : Boolean);const
  IP : array [1..64] Of Byte = (58,50,42,34,26,18,10,2,
                                60,52,44,36,28,20,12,4,
                                62,54,46,38,30,22,14,6,
                                64,56,48,40,32,24,16,8,
                                57,49,41,33,25,17, 9,1,
                                59,51,43,35,27,19,11,3,
                                61,53,45,37,29,21,13,5,
                                63,55,47,39,31,23,15,7);  InvIP : Array [1..64] Of Byte = (40, 8,48,16,56,24,64,32,
                                   39, 7,47,15,55,23,63,31,
                                   38, 6,46,14,54,22,62,30,
                                   37, 5,45,13,53,21,61,29,
                                   36, 4,44,12,52,20,60,28,
                                   35, 3,43,11,51,19,59,27,
                                   34, 2,42,10,50,18,58,26,
                                   33, 1,41, 9,49,17,57,25);  E : Array [1..48] Of Byte = (32, 1, 2, 3, 4, 5,
                                4, 5, 6, 7, 8, 9,
                                8, 9,10,11,12,13,
                               12,13,14,15,16,17,
                               16,17,18,19,20,21,
                               20,21,22,23,24,25,
                               24,25,26,27,28,29,
                               28,29,30,31,32, 1);
  P : Array [1..32] Of Byte = (16, 7,20,21,
                               29,12,28,17,
                                1,15,23,26,
                                5,18,31,10,
                                2, 8,24,14,
                               32,27, 3, 9,
                               19,13,30, 6,
                               22,11, 4,25);
  SBoxes : Array [1..8,0..3,0..15] Of Byte =
           (((14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7),
             ( 0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8),
             ( 4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0),
             (15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13)),            ((15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10),
             ( 3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5),
             ( 0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15),
             (13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9)),            ((10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8),
             (13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1),
             (13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7),
             ( 1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12)),            (( 7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15),
             (13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9),
             (10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4),
             ( 3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14)),            (( 2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9),
             (14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6),
             ( 4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14),
             (11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3)),            ((12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11),
             (10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8),
             ( 9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6),
             ( 4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13)),            (( 4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1),
             (13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6),
             ( 1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2),
             ( 6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12)),            ((13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7),
             ( 1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2),
             ( 7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8),
             ( 2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11)));  PC_1 : Array [1..56] Of Byte = (57,49,41,33,25,17, 9,
                                   1,58,50,42,34,26,18,
                                  10, 2,59,51,43,35,27,
                                  19,11, 3,60,52,44,36,
                                  63,55,47,39,31,23,15,
                                   7,62,54,46,38,30,22,
                                  14, 6,61,53,45,37,29,
                                  21,13, 5,28,20,12, 4);  PC_2 : Array [1..48] Of Byte = (14,17,11,24, 1, 5,
                                   3,28,15, 6,21,10,
                                  23,19,12, 4,26, 8,
                                  16, 7,27,20,13, 2,
                                  41,52,31,37,47,55,
                                  30,40,51,45,33,48,
                                  44,49,39,56,34,53,
                                  46,42,50,36,29,32);  ShiftTable : Array [1..16] Of Byte = (1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1);Var
  InputValue : Array [1..64] Of Byte;
  OutputValue : Array [1..64] Of Byte;
  RoundKeys : Array [1..16,1..48] Of Byte;
  L, R, FunctionResult : Array [1..32] Of Byte;
  C, D : Array [1..28] Of Byte;

Function GetBit (Var Data; Index : Byte) : Byte;Var
  Bits : Array [0..7] Of Byte ABSOLUTE Data;Begin
  Dec (Index);
  If Bits[Index DIV 8] And (128 SHR (Index MOD 8))>0 then GetBit:=1 Else GetBit:=0;
End;{GetBit}Procedure SetBit (Var Data; Index, Value : Byte);Var
  Bits : Array [0..7] Of Byte ABSOLUTE Data;
  Bit : Byte;Begin
  Dec (Index);
  Bit:=128 SHR (Index MOD 8);
  Case Value Of
    0 : Bits[Index DIV 8]:=Bits[Index DIV 8] And (Not Bit);
    1 : Bits[Index DIV 8]:=Bits[Index DIV 8] Or Bit;
  End;
End;{SetBit}Procedure F (Var FR, FK, Output);Var
  R : Array [1..48] Of Byte ABSOLUTE FR;
  K : Array [1..48] Of Byte ABSOLUTE FK;
  Temp1 : Array [1..48] Of Byte;
  Temp2 : Array [1..32] Of Byte;
  n, h, i, j, Row, Column : Integer;
  TotalOut : Array [1..32] Of Byte ABSOLUTE Output;Begin
  For n:=1 to 48 Do Temp1[n]:=R[E[n]] Xor K[n];
  For n:=1 to 8 Do Begin
    i:=(n-1)*6;
    j:=(n-1)*4;
    Row:=Temp1[i+1]*2+Temp1[i+6];
    Column:=Temp1[i+2]*8 + Temp1[i+3]*4 + Temp1[i+4]*2 + Temp1[i+5];
    For h:=1 to 4 Do Begin
      Case h Of
        1 : Temp2[j+h]:=(SBoxes[n,Row,Column] And 8) DIV 8;
        2 : Temp2[j+h]:=(SBoxes[n,Row,Column] And 4) DIV 4;
        3 : Temp2[j+h]:=(SBoxes[n,Row,Column] And 2) DIV 2;
        4 : Temp2[j+h]:=(SBoxes[n,Row,Column] And 1);
      End;
    End;
  End;
  For n:=1 to 32 Do TotalOut[n]:=Temp2[P[n]];
End;{F}Procedure Shift (Var SubKeyPart);Var
  SKP : Array [1..28] Of Byte ABSOLUTE SubKeyPart;
  n, b : Byte;Begin
  b:=SKP[1];
  For n:=1 to 27 Do SKP[n]:=SKP[n+1];
  SKP[28]:=b;
End;{Shift}Procedure SubKey (Round : Byte; Var SubKey);Var
  SK : Array [1..48] Of Byte ABSOLUTE SubKey;
  n, b : Byte;Begin
  For n:=1 to ShiftTable[Round] Do Begin
    Shift (C);
    Shift (D);
  End;
  For n:=1 to 48 Do Begin
    b:=PC_2[n];
    If b<=28 then SK[n]:=C[b] Else SK[n]:=D[b-28];
  End;
End;{SubKey}Var
  n, i, b, Round : Byte;
  Outputje : Array [1..64] Of Byte;
  K : Array [1..48] Of Byte;
  fi : Text;Begin
  For n:=1 to 64 Do InputValue[n]:=GetBit (Input,n);
  For n:=1 to 28 Do Begin
    C[n]:=GetBit(Key,PC_1[n]);
    D[n]:=GetBit(Key,PC_1[n+28]);
  End;
  For n:=1 to 16 Do SubKey (n,RoundKeys[n]);
  For n:=1 to 64 Do If n<=32 then L[n]:=InputValue[IP[n]] Else R[n-32]:=InputValue[IP[n]];
  For Round:=1 to 16 Do Begin
    If Encrypt then
      F (R,RoundKeys[Round],FunctionResult)
    Else
      F (R,RoundKeys[17-Round],FunctionResult);
    For n:=1 to 32 Do FunctionResult[n]:=FunctionResult[n] Xor L[n];
    L:=R;
    R:=FunctionResult;
  End;
  For n:=1 to 64 Do Begin
    b:=InvIP[n];
    If b<=32 then OutputValue[n]:=R[b] Else OutputValue[n]:=L[b-32];
  End;
  For n:=1 to 64 Do SetBit (Output,n,OutputValue[n]);
End;end.

function si(s, inByte: Byte): Byte;
var
  c: Byte;
begin
  c := (inByte and $20) or ((inByte and $1E) shr 1) or
    ((inByte and $01) shl 4);
  Result := (sBox[s][c] and $0F);
end;procedure permutationChoose1(inData: array of Byte;
  var outData: array of Byte);
var
  i: Integer;
begin
  FillChar(outData, 7, 0);
  for i := 0 to 55 do
    if (inData[BitPMC1[i] shr 3] and (1 shl (7 - (BitPMC1[i] and $07)))) <> 0 then
      outData[i shr 3] := outData[i shr 3] or (1 shl (7 - (i and $07)));
end;procedure permutationChoose2(inData: array of Byte;
  var outData: array of Byte);
var
  i: Integer;
begin
  FillChar(outData, 6, 0);
  for i := 0 to 47 do
    if (inData[BitPMC2[i] shr 3] and (1 shl (7 - (BitPMC2[i] and $07)))) <> 0 then
      outData[i shr 3] := outData[i shr 3] or (1 shl (7 - (i and $07)));
end;

procedure cycleMove(var inData: array of Byte; bitMove: Byte);
var
  i: Integer;
begin
  for i := 0 to bitMove - 1 do
  begin
    inData[0] := (inData[0] shl 1) or (inData[1] shr 7);
    inData[1] := (inData[1] shl 1) or (inData[2] shr 7);
    inData[2] := (inData[2] shl 1) or (inData[3] shr 7);
    inData[3] := (inData[3] shl 1) or ((inData[0] and $10) shr 4);
    inData[0] := (inData[0] and $0F);
  end;
end;procedure makeKey(inKey: array of Byte; var outKey: array of TKeyByte);
const
  bitDisplace: array[0..15] of Byte =
  (1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1);
var
  outData56: array[0..6] of Byte;
  key28l: array[0..3] of Byte;
  key28r: array[0..3] of Byte;
  key56o: array[0..6] of Byte;
  i: Integer;
begin
  permutationChoose1(inKey, outData56);  key28l[0] := outData56[0] shr 4;
  key28l[1] := (outData56[0] shl 4) or (outData56[1] shr 4);
  key28l[2] := (outData56[1] shl 4) or (outData56[2] shr 4);
  key28l[3] := (outData56[2] shl 4) or (outData56[3] shr 4);
  key28r[0] := outData56[3] and $0F;
  key28r[1] := outData56[4];
  key28r[2] := outData56[5];
  key28r[3] := outData56[6];  for i := 0 to 15 do
  begin
    cycleMove(key28l, bitDisplace[i]);
    cycleMove(key28r, bitDisplace[i]);
    key56o[0] := (key28l[0] shl 4) or (key28l[1] shr 4);
    key56o[1] := (key28l[1] shl 4) or (key28l[2] shr 4);
    key56o[2] := (key28l[2] shl 4) or (key28l[3] shr 4);
    key56o[3] := (key28l[3] shl 4) or (key28r[0]);
    key56o[4] := key28r[1];
    key56o[5] := key28r[2];
    key56o[6] := key28r[3];
    permutationChoose2(key56o, outKey[i]);
  end;
end;procedure encry(inData, subKey: array of Byte;
  var outData: array of Byte);
var
  outBuf: array[0..5] of Byte;
  buf: array[0..7] of Byte;
  i: Integer;
begin
  expand(inData, outBuf);
  for i := 0 to 5 do outBuf[i] := outBuf[i] xor subKey[i];
                                                // outBuf       xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
  buf[0] := outBuf[0] shr 2; //xxxxxx -> 2
  buf[1] := ((outBuf[0] and $03) shl 4) or (outBuf[1] shr 4); // 4 <- xx xxxx -> 4
  buf[2] := ((outBuf[1] and $0F) shl 2) or (outBuf[2] shr 6); //        2 <- xxxx xx -> 6
  buf[3] := outBuf[2] and $3F; //                    xxxxxx
  buf[4] := outBuf[3] shr 2; //                           xxxxxx
  buf[5] := ((outBuf[3] and $03) shl 4) or (outBuf[4] shr 4); //                                 xx xxxx
  buf[6] := ((outBuf[4] and $0F) shl 2) or (outBuf[5] shr 6); //                                        xxxx xx
  buf[7] := outBuf[5] and $3F; //                                               xxxxxx
  for i := 0 to 7 do buf[i] := si(i, buf[i]);
  for i := 0 to 3 do outBuf[i] := (buf[i * 2] shl 4) or buf[i * 2 + 1];
  permutation(outBuf);
  for i := 0 to 3 do outData[i] := outBuf[i];
end;procedure desData(desMode: TDesMode;
  inData: array of Byte; var outData: array of Byte);
// inData, outData 都为8Bytes，否则出错
var
  i, j: Integer;
  temp, buf: array[0..3] of Byte;
begin
  for i := 0 to 7 do outData[i] := inData[i];
  initPermutation(outData);
  if desMode = dmEncry then
  begin
    for i := 0 to 15 do
    begin
      for j := 0 to 3 do temp[j] := outData[j]; //temp = Ln
      for j := 0 to 3 do outData[j] := outData[j + 4]; //Ln+1 = Rn
      encry(outData, subKey[i], buf); //Rn ==Kn==> buf
      for j := 0 to 3 do outData[j + 4] := temp[j] xor buf[j]; //Rn+1 = Ln^buf
    end;    for j := 0 to 3 do temp[j] := outData[j + 4];
    for j := 0 to 3 do outData[j + 4] := outData[j];
    for j := 0 to 3 do outData[j] := temp[j];
  end
  else if desMode = dmDecry then
  begin
    for i := 15 downto 0 do
    begin
      for j := 0 to 3 do temp[j] := outData[j];
      for j := 0 to 3 do outData[j] := outData[j + 4];
      encry(outData, subKey[i], buf);
      for j := 0 to 3 do outData[j + 4] := temp[j] xor buf[j];
    end;
    for j := 0 to 3 do temp[j] := outData[j + 4];
    for j := 0 to 3 do outData[j + 4] := outData[j];
    for j := 0 to 3 do outData[j] := temp[j];
  end;
  conversePermutation(outData);
end;function EncryStr(Str, Key: string): string;
var
  StrByte, OutByte, KeyByte: array[0..7] of Byte;
  StrResult: string;
  I, J: Integer;
begin
  if (Length(Str) > 0) and (Ord(Str[Length(Str)]) = 0) then
    raise Exception.Create('Error: the last char is NULL char.');
  if Length(Key) < 8 then
    while Length(Key) < 8 do Key := Key + Chr(0);
  while Length(Str) mod 8 <> 0 do Str := Str + Chr(0);  for J := 0 to 7 do KeyByte[J] := Ord(Key[J + 1]);
  makeKey(keyByte, subKey);  StrResult := '';  for I := 0 to Length(Str) div 8 - 1 do
  begin
    for J := 0 to 7 do
      StrByte[J] := Ord(Str[I * 8 + J + 1]);
    desData(dmEncry, StrByte, OutByte);
    for J := 0 to 7 do
      StrResult := StrResult + Chr(OutByte[J]);
  end;  Result := StrResult;
end;function DecryStr(Str, Key: string): string;
var
  StrByte, OutByte, KeyByte: array[0..7] of Byte;
  StrResult: string;
  I, J: Integer;
begin
  if Length(Key) < 8 then
    while Length(Key) < 8 do Key := Key + Chr(0);  for J := 0 to 7 do KeyByte[J] := Ord(Key[J + 1]);
  makeKey(keyByte, subKey);  StrResult := '';  for I := 0 to Length(Str) div 8 - 1 do
  begin
    for J := 0 to 7 do StrByte[J] := Ord(Str[I * 8 + J + 1]);
    desData(dmDecry, StrByte, OutByte);
    for J := 0 to 7 do
      StrResult := StrResult + Chr(OutByte[J]);
  end;
  while (Length(StrResult) > 0) and
    (Ord(StrResult[Length(StrResult)]) = 0) do
    Delete(StrResult, Length(StrResult), 1);
  Result := StrResult;
end;///////////////////////////////////////////////////////////function EncryStrHex(Str, Key: string): string;
var
  StrResult, TempResult, Temp: string;
  I: Integer;
begin
  TempResult := EncryStr(Str, Key);
  StrResult := '';
  for I := 0 to Length(TempResult) - 1 do
  begin
    Temp := Format('%x', [Ord(TempResult[I + 1])]);
    if Length(Temp) = 1 then Temp := '0' + Temp;
    StrResult := StrResult + Temp;
  end;
  Result := StrResult;
end;function DecryStrHex(StrHex, Key: string): string;
  function HexToInt(Hex: string): Integer;
  var
    I, Res: Integer;
    ch: Char;
  begin
    Res := 0;
    for I := 0 to Length(Hex) - 1 do
    begin
      ch := Hex[I + 1];
      if (ch >= '0') and (ch <= '9') then
        Res := Res * 16 + Ord(ch) - Ord('0')
      else if (ch >= 'A') and (ch <= 'F') then
        Res := Res * 16 + Ord(ch) - Ord('A') + 10
      else if (ch >= 'a') and (ch <= 'f') then
        Res := Res * 16 + Ord(ch) - Ord('a') + 10
      else raise Exception.Create('Error: not a Hex String');
    end;
    Result := Res;
  end;var
  Str, Temp: string;
  I: Integer;
begin
  Str := '';
  for I := 0 to Length(StrHex) div 2 - 1 do
  begin
    Temp := Copy(StrHex, I * 2 + 1, 2);
    Str := Str + Chr(HexToInt(Temp));
  end;
  Result := DecryStr(Str, Key);
end;
end.

调试易

寻求一些经典的加密算法单元。。。>>>>>>>>>>>>>>>

解决方案 »