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(DataFlex) Generate an ECC Key (Public and Private)See more ECC ExamplesDemonstrates how to generate an ECC key and save both public and private parts.Note: This example requires Chilkat v11.0.0 or greater.
Use ChilkatAx-win32.pkg Procedure Test Variant vFortuna Handle hoFortuna String sEntropy Boolean iSuccess Handle hoEcc Variant vPrivKey Handle hoPrivKey Variant vPubKey Handle hoPubKey Boolean iBPreferPkcs1 String sTemp1 // 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 |
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