Check File Propertity

时间：2015-07-14 23:54:34 阅读：223 评论：0 收藏：0 [点我收藏+]

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unit CheckFilePropertity;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Buttons,IdHashMessageDigest, IdHashCRC, IdHashSHA, IdSSLOpenSSLHeaders;

type
  TMainFrm = class(TForm)
    lbl1: TLabel;
    edtFileName: TEdit;
    btnBrowser: TBitBtn;
    lbl2: TLabel;
    edtMD5: TEdit;
    lbl3: TLabel;
    edtCRC: TEdit;
    lbl4: TLabel;
    edtSHA1: TEdit;
    dlgOpenFile: TOpenDialog;
    btn1: TButton;
    procedure btnBrowserClick(Sender: TObject);
    procedure edtFileNameChange(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure btn1Click(Sender: TObject);

  private
    { Private declarations }

  public
    function GetFile_MD5(const iFileName: String): String;    // 获取文件MD5
    function GetFile_CRC(const iFileName: String): String;    // 获取文件CRC
    function GetFile_SHA1(const iFileName: String): String;   // 获取文件SHA1
    function GetFile_SHA256(const iFileName: String): String; // 获取文件SHA256
    function GetFile_SHA384(const iFileName: String): String; // 获取文件SHA384
    function GetFile_SHA512(const iFileName: String): String; // 获取文件SHA512
    procedure  GetSum(i:Integer; j:Integer);
    function CheckSum(i:Integer; j:Integer):Integer;
    { Public declarations }
  end;
  type
      TMD5=class(TIdHashMessageDigest5);

var
  MainFrm: TMainFrm;

implementation

{$R *.dfm}
function TMainFrm.CheckSum(i: Integer; j: Integer):Integer;
var
sum : Integer;
begin
     sum := i * j;
     result:= sum;
end;
Procedure TMainFrm.GetSum(i: Integer; j: Integer);
begin
      ShowMessage(IntToStr(i + j));
end;
function TMainFrm.GetFile_MD5(const iFileName: string): String;
var
  MemSteam: TMemoryStream;
  MyMD5   : TIdHashMessageDigest5;
begin
  MemSteam := TMemoryStream.Create;
  MemSteam.LoadFromFile(iFileName);
  MyMD5  := TIdHashMessageDigest5.Create;
  Result := MyMD5.HashStreamAsHex(MemSteam);
  MyMD5.Free;
  MemSteam.Free;
end;

procedure TMainFrm.edtFileNameChange(Sender: TObject);
begin
edtMD5.Text := GetFile_MD5(edtFileName.Text);
edtCRC.Text := GetFile_CRC(edtFileName.Text);
edtSHA1.Text := GetFile_SHA1(edtFileName.Text);
//edtSHA256.Text := GetFile_SHA256(edtFileName.Text);
//edtSHA384.Text := GetFile_SHA384(edtFileName.Text);
//edtSHA512.Text := GetFile_SHA512(edtFileName.Text);
end;

procedure TMainFrm.FormCreate(Sender: TObject);
begin
edtMD5.Font.Color := clRed;
edtCRC.Font.Color := clRed;
edtSHA1.Font.Color := clRed;
end;

function TMainFrm.GetFile_CRC(const iFileName: string): String;
var
  MemSteam: TMemoryStream;
  MyCRC   : TIdHashCRC32;
begin
  MemSteam := TMemoryStream.Create;
  MemSteam.LoadFromFile(iFileName);
  MyCRC  := TIdHashCRC32.Create;
  Result := MyCRC.HashStreamAsHex(MemSteam);
  MyCRC.Free;
  MemSteam.Free;
end;

function TMainFrm.GetFile_SHA1(const iFileName: String): String;
    var
      SHA1      : TIdHashSHA1;
      fileStream: TMemoryStream;
    begin
      SHA1       := TIdHashSHA1.Create;
      fileStream := TMemoryStream.Create;
      try
        fileStream.LoadFromFile(iFileName);
        Result := SHA1.HashStreamAsHex(fileStream);
      finally
        fileStream.Free;
        SHA1.Free;
      end;
    end;

function TMainFrm.GetFile_SHA256(const iFileName: String): String;
    var
      SHA256    : TIdHashSHA256;
      fileStream: TMemoryStream;
    begin
      if 1=1 then
      begin
        SHA256     := TIdHashSHA256.Create;
        fileStream := TMemoryStream.Create;
        try
          fileStream.LoadFromFile(iFileName);
          Result := SHA256.HashStreamAsHex(fileStream);
        finally
          fileStream.Free;
          SHA256.Free;
        end;
      end
      else
      begin
        Result := ‘Error‘;
      end;
    end;

    function TMainFrm.GetFile_SHA384(const iFileName: String): String;
    var
      SHA384    : TIdHashSHA384;
      fileStream: TMemoryStream;
    begin
      if 1=1 then
      begin
        SHA384     := TIdHashSHA384.Create;
        fileStream := TMemoryStream.Create;
        try
          fileStream.LoadFromFile(iFileName);
          Result := SHA384.HashStreamAsHex(fileStream);
        finally
          fileStream.Free;
          SHA384.Free;
        end;
      end
      else
      begin
        Result := ‘Error‘;
      end;
    end;

    function TMainFrm.GetFile_SHA512(const iFileName: String): String;
    var
      SHA512    : TIdHashSHA512;
      fileStream: TMemoryStream;
    begin
      if 1=1 then
      begin
        SHA512     := TIdHashSHA512.Create;
        fileStream := TMemoryStream.Create;
        try
          fileStream.LoadFromFile(iFileName);
          Result := SHA512.HashStreamAsHex(fileStream);
        finally
          fileStream.Free;
          SHA512.Free;
        end;
      end
      else
      begin
        Result := ‘Error‘;
      end;
    end;

procedure TMainFrm.btn1Click(Sender: TObject);
begin
//GetSum(400,50);
ShowMessage(IntToStr(CheckSum(4,5)));
end;

procedure TMainFrm.btnBrowserClick(Sender: TObject);
begin
if dlgOpenFile.Execute then
edtFileName.Text:= dlgOpenFile.FileName;
end;

end.

Check File Propertity

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原文地址：http://www.cnblogs.com/kivin/p/4646939.html

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