delphi加密文件夾
我用的加密解密
function EncryptString(Source, Key: string): string;
//對字元串加密(Source:源 Key:密匙)
var
KeyLen: integer;
KeyPos: integer;
Offset: integer;
Dest: string;
SrcPos: integer;
SrcAsc: integer;
Range: integer;
begin
KeyLen := Length(Key);
if KeyLen = 0 then
Key := 'delphi';
KeyPos := 0;
Range := 256;
randomize;
Offset := random(Range);
Dest := format('%1.2x', [Offset]);
for SrcPos := 1 to Length(Source) do
begin
SrcAsc := (Ord(Source[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 UnEncryptString(Source, Key: string): string;
//對字元串解密(Src:源 Key:密匙)
var
KeyLen: integer;
KeyPos: integer;
Offset: integer;
Dest: string;
SrcPos: integer;
SrcAsc: integer;
TmpSrcAsc: integer;
begin
KeyLen := Length(Key);
if KeyLen = 0 then
Key := 'delphi';
KeyPos := 0;
Offset := strtoint('$' + (Source, 1, 2));
SrcPos := 3;
repeat
SrcAsc := strtoint('$' + (Source, 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(Source);
result := Dest;
end;
『貳』 DELPHI 中INI文件加密還原的問題
可以用異或加密演算法。用明文的ASCII碼值同密鑰進行異或運算,得到密文,解密時用密文同密鑰在進行異或運算即可得到明文
『叄』 Delphi常用的字元串(密碼)加密方式都有哪幾種哪種方法可以將數字字母混合加密成純數字
多了,des、aes、base64、rsa、md5、sha等等,等等,數不勝數。每一種演算法,都可以將數字字母加密成純數字。因為加密的結果可以再加密。比如aes加密後的密文,是16進制的東西,我們可以把這個結果轉換成10進制,不就成了純數字了嗎?所以,所有演算法,都可以實現你所說的。
『肆』 誰能給個DELPHI寫的可逆加密函數
function tForm1.Decrypt(const s:string):string; //key=1時為加密,0為解密
var
I:Integer;
begin
Result:='';
for i:=1 to length(s) do
result := result+chr(ord(s[i]) xor i xor 69);
result := result + char(69);
end;
function tForm1.Decrypt1(const s:string):string; //key=1時為加密,0為解密
var
I:Integer;
begin
Result:='';
for i:=1 to length(s) - 1 do
result := result+chr(ord(s[i]) xor i xor 69);
end;
『伍』 在delphi中怎樣實現SHA1加密
方法一、使用 delphi 內置函數。
delphi 的 IdHashSHA 單元,提供了 TidHashSHa1 類,可以實現 SHA1 加密。
方法二、使用第三方控制項。
如:CnPack 小組提供的 CnSHA1。示例代碼如下:
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procere TForm1.btnSha1Click(Sender: TObject);
begin
{$IFDEF UNICODE}
pnlSha1.Caption := SHA1Print(SHA1StringA(AnsiString(edtSha1.Text)));
{$ELSE}
pnlSha1.Caption := SHA1Print(SHA1String(edtSha1.Text));
{$ENDIF}
end;
『陸』 電腦文檔加密數據加密用什麼軟體好
推薦使用域之盾系統 可以針對各類日常辦公軟體一鍵加密 加密後的文件任何形式的非法外發打開都是亂碼 希望可以幫助到你
1. 透明加解密
系統根據管理策略對相應文件進行加密,用戶訪問需要連接到伺服器,按許可權訪問,越權訪問會受限,通過共享、離線和外發管理可以實現更多的訪問控制。
2. 泄密控制
對打開加密文檔的應用程序進行列印、內存竊取、拖拽和剪貼板等操作管控,用戶不能主動或被動地泄漏機密數據。
3. 審批管理
支持共享、離線和外發文檔,管理員可以按照實際工作需求,配置是否對這些操作進行強制審批。用戶在執行加密文檔的共享、離線和外發等操作時,將視管理員的許可權許可,可能需要經過審批管理員審批。
4. 離線文檔管理
對於員工外出無法接入網路的情況可採用系統的離線管理功能。通過此功能授權指定用戶可以在一定時間內不接入網路仍可輕松訪問加密數據,而該用戶相應的安全策略仍然生效,相應數據仍然受控,文檔許可權也與聯網使用一樣。
5. 外發文檔管理
本功能主要是解決數據二次泄密的威脅,目的是讓發出的文檔仍然受控。通過此功能對 需要發出的文件進行審批和授權後,使用者不必安裝加密客戶端即可輕松訪問受控文件,且可對文件的操作許可權及生命周期予以管控。
6. 審計管理
對加密文檔的常規操作,進行詳細且有效的審計。對離線用戶,聯網後會自動上傳相關日誌到伺服器。
7. 自我保護
通過在操作系統的驅動層對系統自身進行自我保護,保障客戶端不被非法破壞,並且始終運行在安全可信狀態。即使客戶端被意外破壞,客戶端計算機里的加密文檔也不會丟失或泄漏。
『柒』 delphi用 MD5加密後生成文件
/* 收藏的一個MD5加密解密
1、 MD5String、MD5File、MD5Print、MD5Match這四個函數是供調用的。其他是用來輔助這幾個函///////數//的子函數。
2、MD5String為加密字元串。
3、MD5File為加密這個文件。
4、MD5Print是將加密後的密文轉換成字元串。
5、MD5Match是用來比較密文是否一致。
加密字元串aaa MD5String('aaa')
將加密後的aaa顯示出來 MD5Print(MD5String('aaa'))
比較兩次密文是否一致: MD5Match(MD5String('第一次明文'),MD5String('第二次輸入的明文'))
*/
unit U_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;
procere MD5Init(var Context: MD5Context);
procere MD5Update(var Context: MD5Context; Input: pChar; Length: longword);
procere 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;
procere rot(var x: DWORD; n: BYTE);
begin
x := (x shl n) or (x shr (32 - n));
end;
procere 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;
procere 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;
procere 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;
procere 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
procere 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
procere 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
procere 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
procere 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
procere 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[I], Context.State);
inc(I, 64);
end;
Index := 0;
end else I := 0;
CopyMemory(@Context.Buffer[Index], @Input[I], Length - I);
end;
// Finalize given Context, create Digest and zeroize Context
procere 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[I] shr 4) and $0f] + Digits[D[I] 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[I] = D2[I];
inc(I);
end;
end;
end.
『捌』 delphi實現DES位元組流加密,該怎麼解決
在 CnPack 提供的源代碼包里,提供了 des 加解密單元文件,提供了以下四個功能函數:
function DESEncryptStr(Str, Key: AnsiString): AnsiString;
{* 傳入明文與加密 Key,DES 加密返回密文,
註:由於密文可能含有擴展 ASCII 字元,因此在 DELPHI 2009 或以上版本中,請用
AnsiString 類型的變數接收返回值,以避免出現多餘的 Unicode 轉換而導致解密出錯}
function DESDecryptStr(Str, Key: AnsiString): AnsiString;
{* 傳入密文與加密 Key,DES 解密返回明文}
function DESEncryptStrToHex(Str, Key: AnsiString): AnsiString;
{* 傳入明文與加密 Key,DES 加密返回轉換成十六進制的密文}
function DESDecryptStrFromHex(StrHex, Key: AnsiString): AnsiString;
{* 傳入十六進制的密文與加密 Key,DES 解密返回明文}