Digital Signature with SHA256 RSA

Digital Signature with SHA256 RSA

To address potential issues related to digital signatures using SHA256 RSA, you can directly utilize the TScKey object as demonstrated in the following example:

uses ...ScBridge, ScUtils;

var

  Source, Signed: TBytes;

  aComment: string;

  Key: TScKey;

begin

  Key := TScKey.Create();

  Key.ImportFrom('MyKeyFile.pem', Password, aComment);

  Signed := Key.Sign(Source, haSHA2_256);

  if Key.VerifySign(Source, Signed, haSHA2_256) = True then

    // Sign is verified

  Key.Free;

end;

Important Note: The TScKey object is designed to work with TBytes buffers and cannot directly sign files. Therefore, ensure that the Source TBytes buffer is populated with the data you intend to sign before calling the TScKey.Sign method.

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See also:

1. Class TScKey;
2. Method TScKey.ImportKey;
3. Method TScKey.Sign;
4. Method TScKey.VerifySign;
5. Type TScHashAlgorithm.