(.NET Core C#) Generate RSA SSH Key

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Generates an RSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY).

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Chilkat.SshKey key = new Chilkat.SshKey();

// numBits may range from 384 to 4096.  Typical values are
// 1024 or 2048.  (must be a multiple of 64)
// A good choice for the exponent is 65537.  Chilkat recommends
// always using this value.
int numBits = 2048;
int exponent = 65537;
bool success = key.GenerateRsaKey(numBits,exponent);
if (success != true) {
    Debug.WriteLine("Bad params passed to RSA key generation method.");
    return;
}

// Note: Generating a public/private key pair is CPU intensive
// and may take a short amount of time (more than few seconds,
// but less than a minute).

string exportedKey;
bool exportEncrypted;

// Export the RSA private key to OpenSSH, PuTTY, and XML and save. 
exportEncrypted = false;
exportedKey = key.ToOpenSshPrivateKey(exportEncrypted);
// Chilkat provides a SaveText method for convenience...
success = key.SaveText(exportedKey,"privkey_openssh_unencrypted.pem");

// Export with encryption to OpenSSH private key format:
key.Password = "secret";
exportEncrypted = true;
exportedKey = key.ToOpenSshPrivateKey(exportEncrypted);
success = key.SaveText(exportedKey,"privkey_openssh_encrypted.pem");

// Export the RSA private key to unencrypted PuTTY format:
exportEncrypted = false;
exportedKey = key.ToPuttyPrivateKey(exportEncrypted);
success = key.SaveText(exportedKey,"privkey_putty_unencrypted.ppk");

// Export the RSA private key to encrypted PuTTY format:
key.Password = "secret";
exportEncrypted = true;
exportedKey = key.ToPuttyPrivateKey(exportEncrypted);
success = key.SaveText(exportedKey,"privkey_putty_encrypted.ppk");

// Export private key to XML:
exportedKey = key.ToXml();
success = key.SaveText(exportedKey,"privkey.xml");

// ----------------------------------------------------
// Now for the public key....
// ----------------------------------------------------

// The Secure Shell (SSH) Public Key File Format
// is documented in RFC 4716.
exportedKey = key.ToRfc4716PublicKey();
success = key.SaveText(exportedKey,"pubkey_rfc4716.pub");

// OpenSSH has a separate public-key file format, which 
// is also supported by Chilkat SshKey:
exportedKey = key.ToOpenSshPublicKey();
success = key.SaveText(exportedKey,"pubkey_openSsh.pub");

Debug.WriteLine("Finished.");