C

Generate new DSA Key from OpenSSL Parameters File

See more DSA Examples

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

C

#include <C_CkDsa.h>

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

    success = FALSE;

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

    dsa = CkDsa_Create();

    success = CkDsa_GenKeyFromParamsDerFile(dsa,"dsaparam.der");
    if (success != TRUE) {
        printf("%s\n",CkDsa_lastErrorText(dsa));
        CkDsa_Dispose(dsa);
        return;
    }

    // To generate a key from PEM, call GenKeyFromParamsPem 
    // (for an in-memory PEM string) or GenKeyFromParamsFilePem
    // for a PEM file.

    // The public and private keys may now be exported to PEM, DER,
    // and XML formatted files.

    // First for the public key...
    // The public key never needs to be encrypted.

    // Save the public key in PEM format:
    pemStr = CkDsa_toPublicPem(dsa);
    // This example will not check the return value of SaveText...
    success = CkDsa_SaveText(dsa,pemStr,"dsa_pub.pem");

    // Save the public key in DER format:
    success = CkDsa_ToPublicDerFile(dsa,"dsa_pub.der");

    bPublicOnly = TRUE;
    // Save to XML
    xmlStr = CkDsa_toXml(dsa,bPublicOnly);
    success = CkDsa_SaveText(dsa,pemStr,"dsa_pub.xml");

    // ------------------------------------
    // Now for the private key....
    // ------------------------------------

    // Unencrypted PEM:
    pemStr = CkDsa_toPem(dsa);
    success = CkDsa_SaveText(dsa,pemStr,"dsa_priv.pem");

    // Encrypted PEM:
    pemStr = CkDsa_toEncryptedPem(dsa,"myPassword");
    success = CkDsa_SaveText(dsa,pemStr,"dsa_privEncrypted.pem");

    // DER:
    success = CkDsa_ToDerFile(dsa,"dsa_priv.der");

    // XML:
    bPublicOnly = FALSE;
    xmlStr = CkDsa_toXml(dsa,bPublicOnly);
    success = CkDsa_SaveText(dsa,pemStr,"dsa_priv.xml");

    printf("Finished!\n");


    CkDsa_Dispose(dsa);

    }