Xbase++ Requires Chilkat v11.0.0+

Duplicate openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

See more RSA Examples

Demonstrates how to duplicate the creation of an RSA signature produced by this OpenSSL command:

openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

Xbase++

LOCAL nSuccess
LOCAL oPkey
LOCAL oRsa
LOCAL cStrData
LOCAL cBase64Sig

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("myKey.pem")

oRsa := CreateObject("Chilkat.Rsa")

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

//  OpenSSL uses BigEndian byte ordering:
oRsa:LittleEndian := 0

//  The resulting signature will be a Base64 string:
oRsa:EncodingMode := "base64"

//  For simplicity, we're not loading
//  the data to be signed from a file.  We are instead simply
//  using a literal string value.  
cStrData := "This is the text to be signed."

//  Hash the input using MD5, and then sign the hash:
//  Other valid hash algorithm choices are "md2" and "sha-1".
cBase64Sig := oRsa:SignStringENC(cStrData, "md5")

? cBase64Sig

? "Success!"

oPkey:destroy()
oRsa:destroy()