(Unicode C++) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkPrivateKeyW.h>
#include <CkRsaW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkPrivateKeyW privkey;

    // Load the private key object from a PEM file.
    // (To load from a PEM string, call LoadPem instead.)
    success = privkey.LoadPemFile(L"somePath/myPrivateKey.pem");
    if (success == false) {
        wprintf(L"%s\n",privkey.lastErrorText());
        return;
    }

    CkRsaW rsa;
    // Use RSA-PSS by setting OaepPadding = true
    rsa.put_OaepPadding(true);
    // Use SHA256
    rsa.put_OaepHash(L"SHA-256");

    rsa.UsePrivateKey(privkey);

    // Generate a base64 signature.
    rsa.put_EncodingMode(L"base64");

    const wchar_t *sigStr = rsa.signStringENC(L"String to be signed",L"SHA-256");
    if (rsa.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",rsa.lastErrorText());
        return;
    }

    wprintf(L"Signature: %s\n",sigStr);
    }