(Lianja) 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.

Chilkat Lianja Extension Download Chilkat Lianja Extension

// 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.
loPrivKey = createobject("CkPrivateKey")
llSuccess = loPrivKey.LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem","passwd")
if (llSuccess <> .T.) then
    ? loPrivKey.LastErrorText
    release loPrivKey
    return
endif

loRsa = createobject("CkRsa")
loRsa.ImportPrivateKeyObj(loPrivKey)

lcOriginalData = "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
loRsa.Charset = "iso-8859-1"

// We want the RSA signature in base64 format
loRsa.EncodingMode = "base64"

lcSigBase64 = loRsa.SignStringENC(lcOriginalData,"sha256")
? lcSigBase64


release loPrivKey
release loRsa