(PowerBuilder) RSA Encrypt Randomly Generated AES Key

Demonstrates how to RSA encrypt a randomly generated AES key.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Prng
oleobject loo_BdAesKey
integer li_Success
oleobject loo_Cert
oleobject loo_PubKey
oleobject loo_Rsa
string ls_EncryptedAesKey

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// First generate a 256-bit AES key (32 bytes).
loo_Prng = create oleobject
// Use "Chilkat_9_5_0.Prng" for versions of Chilkat < 10.0.0
li_rc = loo_Prng.ConnectToNewObject("Chilkat.Prng")
if li_rc < 0 then
    destroy loo_Prng
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_BdAesKey = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_BdAesKey.ConnectToNewObject("Chilkat.BinData")

li_Success = loo_Prng.GenRandomBd(32,loo_BdAesKey)

// Use a public key from a certificate for RSA encryption.
loo_Cert = create oleobject
// Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Cert.LoadFromFile("qa_data/pem/mf_public_rsa.pem")
if li_Success = 0 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Prng
    destroy loo_BdAesKey
    destroy loo_Cert
    return
end if

loo_PubKey = loo_Cert.ExportPublicKey()
if loo_Cert.LastMethodSuccess <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Prng
    destroy loo_BdAesKey
    destroy loo_Cert
    return
end if

loo_Rsa = create oleobject
// Use "Chilkat_9_5_0.Rsa" for versions of Chilkat < 10.0.0
li_rc = loo_Rsa.ConnectToNewObject("Chilkat.Rsa")

li_Success = loo_Rsa.ImportPublicKeyObj(loo_PubKey)
if li_Success = 0 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Prng
    destroy loo_BdAesKey
    destroy loo_Cert
    destroy loo_Rsa
    return
end if

destroy loo_PubKey

// RSA encrypt our 32-byte AES key.
// The contents of bdAesKey are replaced with result of the RSA encryption.
li_Success = loo_Rsa.EncryptBd(loo_BdAesKey,0)
if li_Success = 0 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Prng
    destroy loo_BdAesKey
    destroy loo_Cert
    destroy loo_Rsa
    return
end if

// Return the result as a base64 string
ls_EncryptedAesKey = loo_BdAesKey.GetEncoded("base64")

Write-Debug "encrypted AES key = " + ls_EncryptedAesKey


destroy loo_Prng
destroy loo_BdAesKey
destroy loo_Cert
destroy loo_Rsa