(PowerBuilder) Get an EC Key in Raw Hex Format

Demonstrates how to get the private and public key parts of an EC (ECDSA) key in lowercase hex formmat.

Note: This example requires Chilkat v9.5.0.83 or greater.

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

integer li_rc
oleobject loo_PrivKey
integer li_Success
oleobject loo_SbPubKeyHex
string ls_PrivKeyHex

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

// Load an EC key from some format..
loo_PrivKey = create oleobject
// Use "Chilkat_9_5_0.PrivateKey" for versions of Chilkat < 10.0.0
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey")
if li_rc < 0 then
    destroy loo_PrivKey
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// This loads an ECDSA key from an unencrypted PEM file (no password required).
li_Success = loo_PrivKey.LoadAnyFormatFile("qa_data/ecc/openssl_ecc_privKey.pem","")
if li_Success = 0 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_PrivKey
    return
end if

// The key type should be "ecc" to indicate an EC key.
Write-Debug "key type = " + loo_PrivKey.KeyType

// What is the size of the private key in bits?
Write-Debug "size in bits = " + string(loo_PrivKey.BitLength)

// Get the private and public EC key parts in raw hex format:
loo_SbPubKeyHex = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbPubKeyHex.ConnectToNewObject("Chilkat.StringBuilder")

ls_PrivKeyHex = loo_PrivKey.GetRawHex(loo_SbPubKeyHex)

// If the private key size in bits is 256, then we should have a 32-byte key (a 64 character hex string).
Write-Debug "private key = " + ls_PrivKeyHex

// The public key is composed of the "x" and "y" parts, and is composed like this:  04||HEX(x)||HEX(y)
Write-Debug "public key = " + loo_SbPubKeyHex.GetAsString()

// Sample output:
// key type = ecc
// size in bits = 256
// private key = ced36f2ba3332be439f79143d69937fc52494cd38e45243c3ea05db183919f1b
// public key = 045b4edcd501831740895f5907feabb71587076a6314d9d5141f9f8c33a478b8ce08b8dfd2a091eb6355803d7e729876c790bc0b176f2015f3bb103813753f676a


destroy loo_PrivKey
destroy loo_SbPubKeyHex