hadisalahi2
پنج شنبه 25 اردیبهشت 1393, 10:48 صبح
باید قبل از اینکه در جدول ذخیره کنی اونها رو با یک روش کدینگ رمز گذاری کنی و موقعی هم که میخوای اونها رو بخونی ، رمزگشایی کنی
در مورد رمزنگاری رشته ها و اطلاعات هم تاپیک های بسیار زیادی وجود داره
اما یک نمونه کد برات میزام
function Decode(const S: AnsiString): AnsiString;
const
Map: array[Char] of Byte = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63, 52, 53,
54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2,
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, 0, 26, 27, 28, 29, 30,
31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0);
var
I: LongInt;
begin
case Length(S) of
2:
begin
I := Map[S[1]] + (Map[S[2]] shl 6);
SetLength(Result, 1);
Move(I, Result[1], Length(Result))
end;
3:
begin
I := Map[S[1]] + (Map[S[2]] shl 6) + (Map[S[3]] shl 12);
SetLength(Result, 2);
Move(I, Result[1], Length(Result))
end;
4:
begin
I := Map[S[1]] + (Map[S[2]] shl 6) + (Map[S[3]] shl 12) +
(Map[S[4]] shl 18);
SetLength(Result, 3);
Move(I, Result[1], Length(Result))
end
end
end;
function Encode(const S: AnsiString): AnsiString;
const
Map: array[0..63] of Char = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' +
'abcdefghijklmnopqrstuvwxyz0123456789+/';
var
I: LongInt;
begin
I := 0;
Move(S[1], I, Length(S));
case Length(S) of
1:
Result := Map[I mod 64] + Map[(I shr 6) mod 64];
2:
Result := Map[I mod 64] + Map[(I shr 6) mod 64] +
Map[(I shr 12) mod 64];
3:
Result := Map[I mod 64] + Map[(I shr 6) mod 64] +
Map[(I shr 12) mod 64] + Map[(I shr 18) mod 64]
end
end;
const
Codes64 = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklm nopqrstuvwxyz+/';
function Encode64(S: string): string;
var
i: Integer;
a: Integer;
x: Integer;
b: Integer;
begin
Result := '';
a := 0;
b := 0;
for i := 1 to Length(s) do
begin
x := Ord(s[i]);
b := b * 256 + x;
a := a + 8;
while a = 6 do
begin
a := a - 6;
x := b div (1 shl a);
b := b mod (1 shl a);
Result := Result + Codes64[x + 1];
end;
end;
if a 0 then
begin
x := b shl (6 - a);
Result := Result + Codes64[x + 1];
end;
end;
function Decode64(S: string): string;
var
i: Integer;
a: Integer;
x: Integer;
b: Integer;
begin
Result := '';
a := 0;
b := 0;
for i := 1 to Length(s) do
begin
x := Pos(s[i], codes64) - 1;
if x = 0 then
begin
b := b * 64 + x;
a := a + 6;
if a = 8 then
begin
a := a - 8;
x := b shr a;
b := b mod (1 shl a);
x := x mod 256;
Result := Result + chr(x);
end;
end
else
Exit;
end;
end;
vBulletin® v4.2.5, Copyright ©2000-1403, Jelsoft Enterprises Ltd.