Visual Basic 6.0

Generate an ECC Key (Public and Private)

See more ECC Examples

Demonstrates how to generate an ECC key and save both public and private parts. Visual Basic 6.0

Dim success As Long
success = 0

' 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.
Dim fortuna As New ChilkatPrng
Dim entropy As String
entropy = fortuna.GetEntropy(32,"base64")
success = fortuna.AddEntropy(entropy,"base64")

Dim ecc As New ChilkatEcc

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

Dim privKey As New PrivateKey
success = ecc.GenKey("secp256r1",fortuna,privKey)
If (success = 0) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

' 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 <> 1) Then
    Debug.Print privKey.LastErrorText
End If

' 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.)
Dim pubKey As New PublicKey
success = privKey.ToPublicKey(pubKey)

' 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.
Dim bPreferPkcs1 As Long
bPreferPkcs1 = 0
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-----
' 

Debug.Print "finished."