Unicode C++

RSA Sign with PKCS8 Encrypted Key

See more RSA Examples

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature. Unicode C++

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

void ChilkatSample(void)
    {
    bool success = false;

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

    CkPrivateKeyW pkey;

    // Load the private key from an RSA PEM file:
    success = pkey.LoadPkcs8EncryptedFile(L"privateKey.key",L"myPassword");

    CkRsaW rsa;

    // Import the private key into the RSA object:
    success = rsa.UsePrivateKey(pkey);
    if (success == false) {
        wprintf(L"%s\n",rsa.lastErrorText());
        return;
    }

    // Return the signature in hex
    rsa.put_EncodingMode(L"hex");

    const wchar_t *strData = L"This is the string to be signed.";

    // Sign the string using the sha-1 hash algorithm.
    // Other valid choices are "md2", "sha256", "sha384", "sha512",  and "md5".
    const wchar_t *hexSig = rsa.signStringENC(strData,L"sha-1");

    wprintf(L"%s\n",hexSig);
    }