(PowerBuilder) RSA Encrypt and Decrypt Strings

PowerBuilder sample code to RSA public-key encrypt and decrypt strings using public and private keys.

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

integer li_rc
oleobject loo_Rsa
integer li_Success
string ls_PublicKey
string ls_PrivateKey
string ls_PlainText
oleobject loo_RsaEncryptor
integer li_UsePrivateKey
string ls_EncryptedStr
oleobject loo_RsaDecryptor
string ls_DecryptedStr

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

loo_Rsa = create oleobject
// Use "Chilkat_9_5_0.Rsa" for versions of Chilkat < 10.0.0
li_rc = loo_Rsa.ConnectToNewObject("Chilkat.Rsa")
if li_rc < 0 then
    destroy loo_Rsa
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// This example also generates the public and private
// keys to be used in the RSA encryption.
// Normally, you would generate a key pair once,
// and distribute the public key to your partner.
// Anything encrypted with the public key can be
// decrypted with the private key.  The reverse is 
// also true: anything encrypted using the private
// key can be decrypted using the public key.

// Generate a 1024-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 4096 bits.
li_Success = loo_Rsa.GenerateKey(1024)
if li_Success <> 1 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Rsa
    return
end if

// Keys are exported in XML format:
ls_PublicKey = loo_Rsa.ExportPublicKey()
ls_PrivateKey = loo_Rsa.ExportPrivateKey()

ls_PlainText = "Encrypting and decrypting should be easy!"

// Start with a new RSA object to demonstrate that all we
// need are the keys previously exported:
loo_RsaEncryptor = create oleobject
// Use "Chilkat_9_5_0.Rsa" for versions of Chilkat < 10.0.0
li_rc = loo_RsaEncryptor.ConnectToNewObject("Chilkat.Rsa")

// Encrypted output is always binary.  In this case, we want
// to encode the encrypted bytes in a printable string.
// Our choices are "hex", "base64", "url", "quoted-printable".
loo_RsaEncryptor.EncodingMode = "hex"

// We'll encrypt with the public key and decrypt with the private
// key.  It's also possible to do the reverse.
li_Success = loo_RsaEncryptor.ImportPublicKey(ls_PublicKey)

li_UsePrivateKey = 0
ls_EncryptedStr = loo_RsaEncryptor.EncryptStringENC(ls_PlainText,li_UsePrivateKey)
Write-Debug ls_EncryptedStr

// Now decrypt:
loo_RsaDecryptor = create oleobject
// Use "Chilkat_9_5_0.Rsa" for versions of Chilkat < 10.0.0
li_rc = loo_RsaDecryptor.ConnectToNewObject("Chilkat.Rsa")

loo_RsaDecryptor.EncodingMode = "hex"
li_Success = loo_RsaDecryptor.ImportPrivateKey(ls_PrivateKey)

li_UsePrivateKey = 1
ls_DecryptedStr = loo_RsaDecryptor.DecryptStringENC(ls_EncryptedStr,li_UsePrivateKey)

Write-Debug ls_DecryptedStr


destroy loo_Rsa
destroy loo_RsaEncryptor
destroy loo_RsaDecryptor