Xbase++ Requires Chilkat v11.0.0+

RSA Signature SHA256withRSA, iso-8859-1, base64

See more RSA Examples

RSA sign the iso-8859-1 byte representation of a string with SHA256withRSA, and return the signature in the base64 encoding. Xbase++

LOCAL nSuccess
LOCAL oPrivKey
LOCAL oRsa
LOCAL cOriginalData
LOCAL cSigBase64

nSuccess := 0

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

//  This example will duplicate the following Java code:
//  
//  Signature sign = Signature.getInstance("SHA256withRSA");
//  sign.initSign(privateKey);
//  sign.update(original.getBytes(Charset.forName("ISO-8859-1")));
//  
//  ...
//  byte[] resultado = sign.sign();
//  sello = encodeByteArrayToBase64(resultado);
//  

//  Load an RSA private key for signing.
//  You can load any format file.  This example loads a .pem, but you can provide path to any type of file holding a private key.
oPrivKey := CreateObject("Chilkat.PrivateKey")
nSuccess := oPrivKey:LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem", "passwd")
IF (nSuccess == 0)
    ? oPrivKey:LastErrorText
    oPrivKey:destroy()
    RETURN
ENDIF

oRsa := CreateObject("Chilkat.Rsa")
oRsa:UsePrivateKey(oPrivKey)

cOriginalData := "This is the string to be hashed an RSA signed."

//  Indicate that we want the iso-8859-1 byte representation of the string to be signed
oRsa:Charset := "iso-8859-1"

//  We want the RSA signature in base64 format
oRsa:EncodingMode := "base64"

cSigBase64 := oRsa:SignStringENC(cOriginalData, "sha256")
? cSigBase64

oPrivKey:destroy()
oRsa:destroy()