(C# UWP/WinRT) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// Unlock the Chilkat API.
// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
Chilkat.Global chilkatGlob = new Chilkat.Global();
bool success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
if (success != true) {
    Debug.WriteLine(chilkatGlob.LastErrorText);
    return;
}

Chilkat.Pem pem = new Chilkat.Pem();

// Load a public key from a PEM file.
// (Assume the PEM contains at least one public key..)
success = await pem.LoadPemFileAsync("/Users/chilkat/testData/pem/myPublicKey.pem");
if (success != true) {
    Debug.WriteLine(pem.LastErrorText);
    return;
}

int i;
int numPublicKeys = pem.NumPublicKeys;
if (numPublicKeys == 0) {
    Debug.WriteLine(("Error: Expected the PEM to contain public keys."));
    return;
}

// Get each public key as PEM, first in PKCS1 format, then in PKCS8.
for (i = 1; i <= numPublicKeys; i++) {

    // First output to PKCS1 PEM format:
    Debug.WriteLine("This is PKCS1 format:");
    pem.PublicKeyFormat = "pkcs1";
    Debug.WriteLine(pem.ToPem());

    // Now PKCS8 PEM format:
    Debug.WriteLine("This is PKCS8 format:");
    pem.PublicKeyFormat = "pkcs8";
    Debug.WriteLine(pem.ToPem());

}