(PowerShell) Generate an ECC Key (Public and Private)

Demonstrates how to generate an ECC key and save both public and private parts.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

# 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")

$ecc = New-Object Chilkat.Ecc

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

$privKey = $ecc.GenEccKey("secp256r1",$fortuna)
if ($ecc.LastMethodSuccess -eq $false) {
    $($ecc.LastErrorText)
    exit
}

# Save the private key to PKCS8 encrypted PEM
# (The private key can be saved in a variety of different formats. See the online reference documentation.)
$success = $privKey.SavePkcs8EncryptedPemFile("pemPassword","qa_output/eccPrivKey.pem")
if ($success -ne $true) {
    $($privKey.LastErrorText)
}

# The private key PEM looks like this:

# 	-----BEGIN ENCRYPTED PRIVATE KEY-----
# 	MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAhUmn+1/lwCIwICCAAw
# 	FAYIKoZIhvcNAwcECPlyNXAXZO+oBIGAIvxvTENXJWbrCwSjh0QNxLecBotUpfI5
# 	auOonLmwVMyt1ahMmNyVo/D+pnKQSE41Fg8fApM0DCDKZUOVCCcK1qirIsMPQkGp
# 	klPJbvrQRVYgzBtU31uNB5y2wqhrIeepal1HXBvbkUK0nfJMbcdz/XAEIQu2HhTD
# 	t6LMScPQld4=
# 	-----END ENCRYPTED PRIVATE KEY-----

# Now get the public key part from the private key.
# (A public key is actually a subset of the private key.)
$pubKey = $privKey.GetPublicKey()

# Save the public key to a PEM file.
# (The public key can be saved in a variety of different formats. See the online reference documentation.)
# For ECC keys, the 1st argument (bPreferPkcs1) is ignored and unused.
$bPreferPkcs1 = $false
$success = $pubKey.SavePemFile($bPreferPkcs1,"qa_output/eccPubKey.pem")

# The public key PEM looks like this:

# 	-----BEGIN PUBLIC KEY-----
# 	MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA
# 	AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////
# 	///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd
# 	NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5
# 	RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
# 	//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABGdOH8uM6SfX3mdV+TR0mWp2
# 	gfVRPlxWxwhOiowuNByBxmQz7ZR4CJY1XcN2zkUo5pzW73ZhGwgd2XTOvqPqG40=
# 	-----END PUBLIC KEY-----
# 

$("finished.")