(C) Iterate Keys and Certs in PEM

Demonstrates how to access each of the private keys and certs contained within a PEM.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <C_CkPem.h>
#include <C_CkPrivateKey.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkPem pem;
    const char *password;
    const char *pemContent;
    int numPrivateKeys;
    int i;
    HCkPrivateKey privKey;
    HCkCert cert;
    int numCerts;

    success = FALSE;

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

    pem = CkPem_Create();

    // Load the PEM from a file.
    // If the PEM is encrypted, provide a password.  Otherwise pass an empty string for the password.
    password = "myPassword";
    success = CkPem_LoadPemFile(pem,"../myPemFiles/myPem.pem",password);
    if (success == FALSE) {
        printf("%s\n",CkPem_lastErrorText(pem));
        CkPem_Dispose(pem);
        return;
    }

    // Note: If the app already has the PEM pre-loaded in a string variable, then load it 
    // by calling LoadPem instead.  
    pemContent = "... the PEM contents ...";
    success = CkPem_LoadPem(pem,pemContent,password);
    // Check for success as before..

    // Iterate over the private keys.
    numPrivateKeys = CkPem_getNumPrivateKeys(pem);
    i = 0;

    privKey = CkPrivateKey_Create();
    while (i < numPrivateKeys) {
        CkPem_PrivateKeyAt(pem,i,privKey);
        printf("Private Key %d is %d in length\n",i,CkPrivateKey_getBitLength(privKey));
        i = i + 1;
    }

    // Iterate over the certificates.
    cert = CkCert_Create();
    numCerts = CkPem_getNumCerts(pem);
    i = 0;
    while (i < numCerts) {
        CkPem_CertAt(pem,i,cert);
        printf("Certificate %d : %s\n",i,CkCert_subjectDN(cert));
        i = i + 1;
    }



    CkPem_Dispose(pem);
    CkPrivateKey_Dispose(privKey);
    CkCert_Dispose(cert);

    }