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(Visual Basic 6.0) Generate an ECC Key (Public and Private)Demonstrates how to generate an ECC key and save both public and private parts.
' 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") Dim success As Long 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 PrivateKey Set privKey = ecc.GenEccKey("secp256r1",fortuna) If (ecc.LastMethodSuccess = 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 PublicKey Set 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. 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." |
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