delphi -MD5 工具

MD5哈希实现及文件校验

最新推荐文章于 2025-10-17 11:11:20 发布

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最新推荐文章于 2025-10-17 11:11:20 发布 · 381 阅读

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#delphi

这是一个使用Delphi实现的MD5哈希算法，包括MD5初始化、更新、最终化等核心过程，以及文件到MD5的转换功能。代码提供了将字符串和文件转化为MD5摘要的函数，用于数据完整性校验。

代码

unit md5;

// -----------------------------------------------------------------------------------------------
interface
// -----------------------------------------------------------------------------------------------

uses
  Windows, Classes, SysUtils;

type
  TProgressEvent = procedure (aPercent: Integer) of object;
	
  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: pAnsiChar; Length: longword);
procedure MD5Final(var Context: MD5Context; var Digest: MD5Digest);

function StrToMD5(M: AnsiString): MD5Digest;
function ViewMD5(D: MD5Digest): AnsiString;
function StrToMD5Str(M: AnsiString): AnsiString;
function  FileToMD5(const aFileName: String; aProgress: TProgressEvent): MD5Digest;
function  FileToMD5Str(const aFileName: String; aProgress: TProgressEvent = nil): string;
function MatchMD5(D1, D2: MD5Digest): boolean;

function DecryptMD5(Decryptstr: AnsiString): AnsiString;
function EncryptMD5(Encyptstr: AnsiString): AnsiString;

function MD5Print(D: MD5Digest): AnsiString;
const
  MD5_16_0 = '0000000000000000';
// -----------------------------------------------------------------------------------------------
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 DecryptMD5(Decryptstr: AnsiString): AnsiString;
begin
  Result := StrToMD5Str(Decryptstr);
end;

function EncryptMD5(Encyptstr: AnsiString): AnsiString;
begin
  Result := StrToMD5Str(Encyptstr);
end;

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
  Res