(C++) RSA Signature using Private Key from .snk File

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

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#include <CkRsa.h>

void ChilkatSample(void)
    {
    CkRsa rsa;

    // Load the .snk and return the private key as XML.
    const char *xmlStr = rsa.snkToXml("./test.snk");
    if (rsa.get_LastMethodSuccess() == false) {
        std::cout << rsa.lastErrorText() << "\r\n";
        return;
    }

    bool success = rsa.ImportPrivateKey(xmlStr);
    if (success == false) {
        std::cout << rsa.lastErrorText() << "\r\n";
        return;
    }

    // Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
    // Return the signature in base64 format.
    rsa.put_EncodingMode("base64");
    rsa.put_Charset("utf-8");
    const char *sigBase64 = rsa.signStringENC("This is the text to be hashed and signed.","sha256");
    if (rsa.get_LastMethodSuccess() == false) {
        std::cout << rsa.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "RSA signature as base64: " << sigBase64 << "\r\n";
    }