PowerShell Requires Chilkat v11.0.0+

Generate ECDSA Key and Get Details as XML

See more ECC Examples

Demonstrates how to generate an ECDSA key and gets the parts as XML. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

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

$ecc = New-Object Chilkat.Ecc

#  Generate a random ECC private key on the secp256k1 curve.
#  Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256r1.

#  Create a Fortuna PRNG and seed it with system entropy.
#  This will be our source of random data for generating the ECC private key.
$fortuna = New-Object Chilkat.Prng
$entropy = $fortuna.GetEntropy(32,"base64")
$success = $fortuna.AddEntropy($entropy,"base64")

$privKey = New-Object Chilkat.PrivateKey
$success = $ecc.GenKey("secp256k1",$fortuna,$privKey)
if ($success -eq $false) {
    $($ecc.LastErrorText)
    exit
}

#  An EC private key has this ASN.1
#  ECPrivateKey ::= SEQUENCE {
#      version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
#      privateKey     OCTET STRING,
#      parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
#      publicKey  [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.)

$asn = New-Object Chilkat.Asn
$success = $asn.LoadEncoded($privKey.GetPkcs1ENC("base64"),"base64")
if ($success -ne $true) {
    $($asn.LastErrorText)
    exit
}

$xml = New-Object Chilkat.Xml
$xml.LoadXml($asn.AsnToXml())

$($xml.GetXml())

#  The XML looks like this:
#  <?xml version="1.0" encoding="utf-8" ?>
#  <sequence>
#      <int>01</int>
#      <octets>JgJvBG+3wletkJab8iXAkpz0O8/AgWZSpkYVcB7SpnU=</octets>
#      <contextSpecific tag="0" constructed="1">
#          <oid>1.3.132.0.10</oid>
#      </contextSpecific>
#  </sequence>

#  The 32-byte private key is in the octets..
#  Get it as hex.
$crypt = New-Object Chilkat.Crypt2
$privKeyHex = $crypt.ReEncode($xml.GetChildContent("octets"),"base64","hex")

$("EC private key as hex = " + $privKeyHex)