Ruby

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. Ruby

require 'chilkat'

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.
pubKey = Chilkat::CkPublicKey.new()
# In all Chilkat methods expecting a path, you pass either absolute or relative paths.
success = pubKey.LoadFromFile("rsaKeys/Test2048Rsa.pem")
if (success == false)
    print pubKey.lastErrorText() + "\n";
    exit
end

rsa = Chilkat::CkRsa.new()

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

# Generate a random 256-bit AES key (32 bytes)
bdAesKey = Chilkat::CkBinData.new()
prng = Chilkat::CkPrng.new()
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")