Delphi DLL Requires Chilkat v11.0.0+

Unzip an AES Encrypted Text File directly into a String Variable

See more Zip Examples

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it. Delphi DLL

var
success: Boolean;
zip: HCkZip;
entry: HCkZipEntry;
lineEndingBehavior: Integer;
srcCharset: PWideChar;
xmlText: PWideChar;

begin
success := False;

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

zip := CkZip_Create();

//  This example opens a WinZip-compatible AES encrypted
//  .zip that contains a single file: hamlet.xml.

//  It decrypts and unzips hamlet.xml directly into a string
//  variable.
CkZip_SetPassword(zip,'secret');
success := CkZip_OpenZip(zip,'qa_data/hamlet.zip');
if (success = False) then
  begin
    Memo1.Lines.Add(CkZip__lastErrorText(zip));
    Exit;
  end;

entry := CkZipEntry_Create();
success := CkZip_EntryOf(zip,'hamlet.xml',entry);
if (success = False) then
  begin
    Memo1.Lines.Add(CkZip__lastErrorText(zip));
    Exit;
  end;

//  lineEndingBehavior:
//  0 = leave unchanged.
//  1 = convert all to bare LF's
//  2 = convert all to CRLF's
lineEndingBehavior := 0;
srcCharset := 'utf-8';
xmlText := CkZipEntry__unzipToString(entry,lineEndingBehavior,srcCharset);
Memo1.Lines.Add(xmlText);

CkZip_Dispose(zip);
CkZipEntry_Dispose(entry);