PowerBuilder

Encrypt File using X.509 Certificate using AES in CBC Mode

See more Encryption Examples

Demonstrates how to encrypt a file using an X.509 Certificate's public key, where the underlying bulk encryption algorithm is 128-bit AES in CBC mode. (The underlying bulk encryption algorithm can be specified to be other algorithms/strengths.) PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Crypt
oleobject loo_Cert

li_Success = 0

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

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Use public-key cryptography for encryption.
loo_Crypt.CryptAlgorithm = "pki"

// Get an X.509 certificate to use for encrypting.
// Note: Chilkat provides many different ways of loading a certificate, from many different formats,
// or if on Windows, from the installed certificates on the system.
// This example simply loads a certificate from a file.
// Also, for encryption, only the public key is needed.  Digital certificates embed the public key
// within the X.509 format itself.  Therefore, if you have a certificate, you also have the public key.
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Cert.LoadFromFile("qa_data/certs/testCert.cer")
if li_Success <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    return
end if

li_Success = loo_Crypt.SetEncryptCert(loo_Cert)
if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    return
end if

// Indicate the underlying bulk encryption algorithm to be used:
loo_Crypt.Pkcs7CryptAlg = "aes"
loo_Crypt.KeyLength = 128

// Note: When doing public-key encryption the underlying bulk symmetric cipher mode will always be CBC. (at least with Chilkat...)

// There's one last option that could be set.  If is the RSA encryption encryption/padding scheme. 
// By default, RSAES_PKCS1-V1_5 is used.  If desired, the OaepPadding property could be set to 1 to
// use RSAES_OAEP.  (We'll leave it set at the default value of 0)
loo_Crypt.OaepPadding = 0

// Everything is specified.  Now just encrypt...
// The output is PKCS7 in binary DER format.
li_Success = loo_Crypt.CkEncryptFile("qa_data/hamlet.xml","qa_output/hamlet.p7")
if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    return
end if

Write-Debug "Finished."


destroy loo_Crypt
destroy loo_Cert