.NET Core C#

Generate a Random 256-bit AES Key and RSA Encrypt

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Generates a random 256-bit AES key and encrypts using an RSA public key. Only the owner of the RSA private key will be able to decrypt the AES key. .NET Core C#

bool success = false;

// The RSA public key is used for encryption, and the private key for decryption.

// The public key's role is to make encryption accessible to anyone while ensuring that
// only the private key holder can decrypt the messages.
// The public key is designed to be widely distributed so anyone can use it to encrypt messages
// intended for the owner of the private key.

// Load our 2048-bit RSA public key.
Chilkat.PublicKey pubKey = new Chilkat.PublicKey();
// In all Chilkat methods expecting a path, you pass either absolute or relative paths.
success = pubKey.LoadFromFile("rsaKeys/Test2048Rsa.pem");
if (success == false) {
    Debug.WriteLine(pubKey.LastErrorText);
    return;
}

Chilkat.Rsa rsa = new Chilkat.Rsa();

// Tell RSA to use the public key.
rsa.UsePublicKey(pubKey);

// Generate a random 256-bit AES key (32 bytes)
Chilkat.BinData bdAesKey = new Chilkat.BinData();
Chilkat.Prng prng = new Chilkat.Prng();
prng.GenRandomBd(32,bdAesKey);

// RSA encrypt.
rsa.EncryptBd(bdAesKey,false);

// Save the RSA encrypted AES key to a file.
success = bdAesKey.WriteFile("rsaEncrypted/myAes.key");