(Visual FoxPro) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loPrivKey
LOCAL lnSuccess
LOCAL loRsa
LOCAL lcOriginalData
LOCAL lcSigBase64

* 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.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.PrivateKey')
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPrivKey.LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem","passwd")
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rsa')
loRsa = CreateObject('Chilkat.Rsa')
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