Xbase++ Requires Chilkat v11.0.0+

Create PKCS1 RSA Signature with PEM Private Key

See more RSA Examples

Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature. Xbase++

LOCAL nSuccess
LOCAL oPkey
LOCAL oRsa
LOCAL cStrData
LOCAL cHexSig

nSuccess := 0

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

oPkey := CreateObject("Chilkat.PrivateKey")

//  Load the private key from an RSA PEM file:
nSuccess := oPkey:LoadPemFile("pvkey2_rsa.pem")
IF (nSuccess == 0)
    ? oPkey:LastErrorText
    oPkey:destroy()
    RETURN
ENDIF

oRsa := CreateObject("Chilkat.Rsa")

//  Import the private key into the RSA object:
nSuccess := oRsa:UsePrivateKey(oPkey)
IF (nSuccess == 0)
    ? oRsa:LastErrorText
    oPkey:destroy()
    oRsa:destroy()
    RETURN
ENDIF

//  Get the signature as hex.
oRsa:EncodingMode := "hex"

cStrData := "This is the string to be signed."

//  Sign the string using the sha-1 hash algorithm.
//  Other valid choices are "md2", "md5", "sha256",
//  "sha384", and "sha512".
cHexSig := oRsa:SignStringENC(cStrData, "sha-1")

? cHexSig

? "Success!"

oPkey:destroy()
oRsa:destroy()