(Delphi DLL) Hash File: SHA-1, HAVAL, MD2, MD5, SHA-256, SHA-384, SHA-512

Computing the hash for a file of any size.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: HCkCrypt2;
filename: PWideChar;
hash: PWideChar;

begin
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

crypt := CkCrypt2_Create();

// Any type of file may be hashed.
// There is  no size limitation because the file is consumed
// in streaming mode internally.

filename := 'something.zip';

CkCrypt2_putHashAlgorithm(crypt,'sha1');
CkCrypt2_putEncodingMode(crypt,'hex');

// Other possible EncodingMode settings are: 
// "quoted-printable", "base64", "base32", and "url"

hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('SHA1:');
Memo1.Lines.Add(hash);

// Hash using MD2
CkCrypt2_putHashAlgorithm(crypt,'md2');
hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('MD2:');
Memo1.Lines.Add(hash);

// Hash using MD5
CkCrypt2_putHashAlgorithm(crypt,'md5');
hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('MD5:');
Memo1.Lines.Add(hash);

// Hash using SHA-256
CkCrypt2_putHashAlgorithm(crypt,'sha256');
hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('SHA256:');
Memo1.Lines.Add(hash);

// Hash using SHA-384
CkCrypt2_putHashAlgorithm(crypt,'sha384');
hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('SHA384:');
Memo1.Lines.Add(hash);

// Hash using SHA-512
CkCrypt2_putHashAlgorithm(crypt,'sha512');
hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('SHA512:');
Memo1.Lines.Add(hash);

// Hash using HAVAL
// There are two additional properties relevant to HAVAL:
// HavalRounds, and KeyLength.
// HavalRounds can have values of 3, 4, or 5.
// KeyLength can have values of 128, 160, 192, 224, or 256
CkCrypt2_putHashAlgorithm(crypt,'haval');
CkCrypt2_putHavalRounds(crypt,5);
CkCrypt2_putKeyLength(crypt,256);
hash := CkCrypt2__hashFileENC(crypt,filename);
Memo1.Lines.Add('Haval:');
Memo1.Lines.Add(hash);

CkCrypt2_Dispose(crypt);

end;