DataFlex

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. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vFortuna
    Handle hoFortuna
    String sEntropy
    Handle hoEcc
    Variant vPrivKey
    Handle hoPrivKey
    Variant vPubKey
    Handle hoPubKey
    Boolean iBPreferPkcs1
    String sTemp1

    Move False To iSuccess

    // 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.
    Get Create (RefClass(cComChilkatPrng)) To hoFortuna
    If (Not(IsComObjectCreated(hoFortuna))) Begin
        Send CreateComObject of hoFortuna
    End
    Get ComGetEntropy Of hoFortuna 32 "base64" To sEntropy
    Get ComAddEntropy Of hoFortuna sEntropy "base64" To iSuccess

    Get Create (RefClass(cComChilkatEcc)) To hoEcc
    If (Not(IsComObjectCreated(hoEcc))) Begin
        Send CreateComObject of hoEcc
    End

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

    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
    If (Not(IsComObjectCreated(hoPrivKey))) Begin
        Send CreateComObject of hoPrivKey
    End
    Get pvComObject of hoFortuna to vFortuna
    Get pvComObject of hoPrivKey to vPrivKey
    Get ComGenKey Of hoEcc "secp256r1" vFortuna vPrivKey To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoEcc To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // 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.)
    Get ComSavePkcs8EncryptedPemFile Of hoPrivKey "pemPassword" "qa_output/eccPrivKey.pem" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
    End

    // 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.)
    Get Create (RefClass(cComChilkatPublicKey)) To hoPubKey
    If (Not(IsComObjectCreated(hoPubKey))) Begin
        Send CreateComObject of hoPubKey
    End
    Get pvComObject of hoPubKey to vPubKey
    Get ComToPublicKey Of hoPrivKey vPubKey To iSuccess

    // 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.
    Move False To iBPreferPkcs1
    Get ComSavePemFile Of hoPubKey iBPreferPkcs1 "qa_output/eccPubKey.pem" To iSuccess

    // 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-----
    // 

    Showln "finished."


End_Procedure