Delphi DLL Requires Chilkat v11.0.0+

Workaround for the deprecated Crypt2.OpaqueVerifyString method

Shows how to replace the deprecated OpaqueVerifyString method. (Chilkat is moving away from the use of CkByteData.) Delphi DLL

var
success: Boolean;
crypt: HCkCrypt2;
path: PWideChar;
inData: HCkByteData;
originalText: PWideChar;
bd: HCkBinData;

begin
success := False;

crypt := CkCrypt2_Create();

//  Specifies how the original data bytes are converted to characters
CkCrypt2_putCharset(crypt,'utf-8');

path := 'c:/someDir/example.dat';

//  ------------------------------------------------------------------------
//  The OpaqueVerifyString method is deprecated:

inData := CkByteData_Create();
CkByteData_loadFile(inData,path);

originalText := CkCrypt2__opaqueVerifyString(crypt,inData);

//  ------------------------------------------------------------------------
//  Workaround.
//  (Chilkat is moving away from using CkByteData)

bd := CkBinData_Create();
CkBinData_LoadFile(bd,path);

//  If the opaque signature is validated, the contents of bd are replaced with the original data that was signed.
success := CkCrypt2_OpaqueVerifyBd(crypt,bd);

//  Indicate how the bytes are converted to chars by passing the charset.
originalText := CkBinData__getString(bd,'utf-8');

CkCrypt2_Dispose(crypt);
CkByteData_Dispose(inData);
CkBinData_Dispose(bd);