(Unicode C) Generate RSA Key and Export to Encrypted PEM

Unicode C sample showing how to generate an RSA key and export to encrypted PEM.

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#include <C_CkRsaW.h>
#include <C_CkPrivateKeyW.h>

void ChilkatSample(void)
    {
    HCkRsaW rsa;
    BOOL success;
    const wchar_t *keyXml;
    HCkPrivateKeyW privKey;
    const wchar_t *strEncPem;

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

    rsa = CkRsaW_Create();

    // Generate a 1024-bit key.  Chilkat RSA supports
    // key sizes ranging from 512 bits to 4096 bits.
    success = CkRsaW_GenerateKey(rsa,1024);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRsaW_lastErrorText(rsa));
        CkRsaW_Dispose(rsa);
        return;
    }

    // Get the private key as unencrypted XML:
    keyXml = CkRsaW_exportPrivateKey(rsa);
    wprintf(L"%s\n",keyXml);

    // To encrypt the key -- meaning to get the key in
    // an encrypted PEM format -- load it into a PrivateKey object,
    // and then export to encrypted PEM:
    privKey = CkPrivateKeyW_Create();

    success = CkPrivateKeyW_LoadXml(privKey,keyXml);
    if (success != TRUE) {
        wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey));
        CkRsaW_Dispose(rsa);
        CkPrivateKeyW_Dispose(privKey);
        return;
    }

    strEncPem = CkPrivateKeyW_getPkcs8EncryptedPem(privKey,L"myPassword");

    // You now have the private key in an encrypted format,
    // which may be (for example) saved to a database


    CkRsaW_Dispose(rsa);
    CkPrivateKeyW_Dispose(privKey);

    }