Lianja

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. Lianja

llSuccess = .F.

// 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.
loPubKey = createobject("CkPublicKey")
// In all Chilkat methods expecting a path, you pass either absolute or relative paths.
llSuccess = loPubKey.LoadFromFile("rsaKeys/Test2048Rsa.pem")
if (llSuccess = .F.) then
    ? loPubKey.LastErrorText
    release loPubKey
    return
endif

loRsa = createobject("CkRsa")

// Tell RSA to use the public key.
loRsa.UsePublicKey(loPubKey)

// Generate a random 256-bit AES key (32 bytes)
loBdAesKey = createobject("CkBinData")
loPrng = createobject("CkPrng")
loPrng.GenRandomBd(32,loBdAesKey)

// RSA encrypt.
loRsa.EncryptBd(loBdAesKey,.F.)

// Save the RSA encrypted AES key to a file.
llSuccess = loBdAesKey.WriteFile("rsaEncrypted/myAes.key")


release loPubKey
release loRsa
release loBdAesKey
release loPrng