Delphi DLL

Load a Private Key from XML Text

Demonstrates the Chilkat PrivateKey.LoadXml method, which loads a private key from XML text. The only argument is the XML string. Supported roots include RSAKeyValue, DSAKeyValue, ECCKeyValue, and Ed25519KeyValue.

Background: XML key representations such as RSAKeyValue come from the .NET/XML-DSIG world, where keys are exchanged as XML elements. This loads that form — the inverse of GetXml — which is handy for interoperating with .NET code or systems built around XML signatures. It is a plaintext format, so protect the XML like any unencrypted key material.

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var
success: Boolean;
privKey: HCkPrivateKey;
xmlText: PWideChar;

begin
success := False;

//  Demonstrates the PrivateKey.LoadXml method, which loads a private key from XML text.  The only
//  argument is the XML string.  Supported roots include RSAKeyValue, DSAKeyValue, ECCKeyValue,
//  and Ed25519KeyValue.

privKey := CkPrivateKey_Create();

//  The XML text of a private key (for example as produced by GetXml).
xmlText := '<RSAKeyValue><Modulus>...</Modulus><Exponent>AQAB</Exponent>...</RSAKeyValue>';

success := CkPrivateKey_LoadXml(privKey,xmlText);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

Memo1.Lines.Add('Loaded a ' + CkPrivateKey__keyType(privKey) + ' private key.');

CkPrivateKey_Dispose(privKey);