PowerBuilder

Get an EC Key in Raw Hex Format

See more ECC Examples

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.

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_PrivKey
oleobject loo_SbPubKeyHex
string ls_PrivKeyHex

li_Success = 0

// 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
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
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