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(Delphi DLL) Compute Glacier SHA256 Tree Hash of a FileComputes the Amazon Glacier SHA256 tree hash for a file. Note: This example requires Chilkat v9.5.0.78 or greater.
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; treeHashHex: PWideChar; begin // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. crypt := CkCrypt2_Create(); // For more information about Amazon Glacier tree hashes, see Computing Glacier Checksums // Chilkat added the "sha256-tree-hash" algorithm in v9.5.0.78 to make it easy to compute the Glacier tree hash checksum // of a file or from bytes in memory. CkCrypt2_putHashAlgorithm(crypt,'sha256-tree-hash'); // Return the hash in lowercase hexidecimal format. CkCrypt2_putEncodingMode(crypt,'hexlower'); treeHashHex := CkCrypt2__hashFileENC(crypt,'qa_data/jpg/penguins.jpg'); Memo1.Lines.Add('SHA256 tree hash = ' + treeHashHex); CkCrypt2_Dispose(crypt); end; |
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