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(C) Convert DSA DER Private Key to PEM

Converts a DSA private key from DER format to PEM. Demonstrates how to write both encrypted and unencrypted PEM formatted private keys.

Chilkat C/C++ Library Downloads

MS Visual C/C++

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#include <C_CkDsa.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkDsa dsa;
    const char *pemStr;



    dsa = CkDsa_Create();

    success = CkDsa_UnlockComponent(dsa,"Anything for 30-day trial");
    if (success != TRUE) {
        printf("%s\n",CkDsa_lastErrorText(dsa));
        CkDsa_Dispose(dsa);
        return;
    }

    //  Load a DER private key.
    success = CkDsa_FromDerFile(dsa,"dsa_priv.der");
    if (success != TRUE) {
        printf("%s\n",CkDsa_lastErrorText(dsa));
        CkDsa_Dispose(dsa);
        return;
    }

    //  Save to unencrypted PEM:
    pemStr = CkDsa_toPem(dsa);
    success = CkDsa_SaveText(dsa,pemStr,"dsa_priv.pem");
    if (success != TRUE) {
        printf("%s\n",CkDsa_lastErrorText(dsa));
        CkDsa_Dispose(dsa);
        return;
    }

    //  Save to encrypted PEM:
    pemStr = CkDsa_toEncryptedPem(dsa,"myPassword");
    success = CkDsa_SaveText(dsa,pemStr,"dsa_privEncrypted.pem");
    if (success != TRUE) {
        printf("%s\n",CkDsa_lastErrorText(dsa));
        CkDsa_Dispose(dsa);
        return;
    }

    printf("Finished!\n");


    CkDsa_Dispose(dsa);

    }

 

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