Swift

Generate a Random 256-bit AES Key and RSA Encrypt

See more RSA Examples

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. Swift

func chilkatTest() {
    var success: Bool = 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.
    let pubKey = CkoPublicKey()!
    // In all Chilkat methods expecting a path, you pass either absolute or relative paths.
    success = pubKey.load(fromFile: "rsaKeys/Test2048Rsa.pem")
    if success == false {
        print("\(pubKey.lastErrorText!)")
        return
    }

    let rsa = CkoRsa()!

    // Tell RSA to use the public key.
    rsa.usePublicKey(pubKey: pubKey)

    // Generate a random 256-bit AES key (32 bytes)
    let bdAesKey = CkoBinData()!
    let prng = CkoPrng()!
    prng.genRandomBd(numBytes: 32, bd: bdAesKey)

    // RSA encrypt.
    rsa.encryptBd(bd: bdAesKey, usePrivateKey: false)

    // Save the RSA encrypted AES key to a file.
    success = bdAesKey.writeFile(path: "rsaEncrypted/myAes.key")

}