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Visual FoxPro Examples


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(Visual FoxPro) Generate an ECC Key (Public and Private)

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

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loFortuna
LOCAL lcEntropy
LOCAL lnSuccess
LOCAL loEcc
LOCAL loPrivKey
LOCAL loPubKey
LOCAL lnBPreferPkcs1

*  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.
loFortuna = CreateObject('Chilkat_9_5_0.Prng')
lcEntropy = loFortuna.GetEntropy(32,"base64")
lnSuccess = loFortuna.AddEntropy(lcEntropy,"base64")

loEcc = CreateObject('Chilkat_9_5_0.Ecc')

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

loPrivKey = loEcc.GenEccKey("secp256r1",loFortuna)
IF (ISNULL(loPrivKey)) THEN
    ? loEcc.LastErrorText
    RELEASE loFortuna
    RELEASE loEcc
    CANCEL
ENDIF

*  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.)
lnSuccess = loPrivKey.SavePkcs8EncryptedPemFile("pemPassword","qa_output/eccPrivKey.pem")
IF (lnSuccess <> 1) THEN
    ? loPrivKey.LastErrorText
ENDIF

RELEASE loPrivKey

*  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.)
loPubKey = loPrivKey.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.
lnBPreferPkcs1 = 0
lnSuccess = loPubKey.SavePemFile(lnBPreferPkcs1,"qa_output/eccPubKey.pem")

RELEASE loPubKey

*  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."

RELEASE loFortuna
RELEASE loEcc


 

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