Save a Private Key as a PKCS #8 PEM File

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Demonstrates the Chilkat PrivateKey.SavePkcs8PemFile method, which saves the key as unencrypted PKCS #8 PEM (the PRIVATE KEY label) to a file. The only argument is the destination path.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This writes the widely-compatible unencrypted .pem that most modern tooling reads — the text (Base64) form of PKCS #8. It is convenient and portable, but unprotected, so keep the file access-controlled or prefer the encrypted variant for anything that leaves a trusted location.

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#include <C_CkPrivateKey.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkPrivateKey privKey;

    success = FALSE;

    //  Load a private key to export.
    privKey = CkPrivateKey_Create();
    success = CkPrivateKey_LoadPemFile(privKey,"qa_data/private.pem");
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkPrivateKey_Dispose(privKey);
        return;
    }

    //  Save as unencrypted PKCS #8 PEM (the "PRIVATE KEY" label).
    success = CkPrivateKey_SavePkcs8PemFile(privKey,"qa_output/private_pkcs8.pem");
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkPrivateKey_Dispose(privKey);
        return;
    }

    printf("Saved.\n");


    CkPrivateKey_Dispose(privKey);

    }