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

RSA encrypt a SHA256 hash with OAEP padding.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

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

void ChilkatSample(void)
    {
    // 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.)
    bool success = privkey.LoadPemFile(L"somePath/myPrivateKey.pem");
    if (success != true) {
        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.ImportPrivateKeyObj(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() != true) {
        wprintf(L"%s\n",rsa.lastErrorText());
        return;
    }

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