Xbase++ Requires Chilkat v11.0.0+

RSA Signature using Private Key from .snk File

See more RSA Examples

A .snk file (Strong Name Key file) is a file format used in the .NET ecosystem to store an RSA public/private key pair. This key pair is typically used for strong-naming assemblies, which is a process of signing .NET assemblies to ensure their integrity and to uniquely identify them.

This example loads a private key from a .snk file and creates an RSA signature.

Xbase++

LOCAL nSuccess
LOCAL oRsa
LOCAL cXmlStr
LOCAL oPrivKey
LOCAL cSigBase64

nSuccess := 0

oRsa := CreateObject("Chilkat.Rsa")

//  Load the .snk and return the private key as XML.
cXmlStr := oRsa:SnkToXml("./test.snk")
IF (oRsa:LastMethodSuccess == 0)
    ? oRsa:LastErrorText
    oRsa:destroy()
    RETURN
ENDIF

oPrivKey := CreateObject("Chilkat.PrivateKey")
nSuccess := oPrivKey:LoadXml(cXmlStr)
IF (nSuccess == 0)
    ? oPrivKey:LastErrorText
    oRsa:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

nSuccess := oRsa:UsePrivateKey(oPrivKey)
IF (nSuccess == 0)
    ? oRsa:LastErrorText
    oRsa:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

//  Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
//  Return the signature in base64 format.
oRsa:EncodingMode := "base64"
oRsa:Charset := "utf-8"
cSigBase64 := oRsa:SignStringENC("This is the text to be hashed and signed.", "sha256")
IF (oRsa:LastMethodSuccess == 0)
    ? oRsa:LastErrorText
    oRsa:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

? "RSA signature as base64: " + cSigBase64

oRsa:destroy()
oPrivKey:destroy()